/* ==========================================================================
   REZOLUS VIEWER - Performance Telemetry Dashboard
   A refined, technical aesthetic for high-resolution systems analysis
   ========================================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ==========================================================================
   Design Tokens
   ========================================================================== */

:root {
    /* Background layers - deep space aesthetic */
    --bg-void: #05080d;
    --bg: #0a0e14;
    --bg-secondary: #0d1117;
    --bg-tertiary: #161b22;
    --bg-card: #0d1117;
    --bg-card-hover: #111820;
    --bg-elevated: #1c2128;

    /* Border hierarchy */
    --border-subtle: rgba(48, 54, 61, 0.4);
    --border-default: rgba(48, 54, 61, 0.7);
    --border-emphasis: rgba(56, 139, 253, 0.3);

    /* Foreground - high contrast for readability */
    --fg: #e6edf3;
    --fg-secondary: #8b949e;
    --fg-muted: #484f58;
    --fg-subtle: #30363d;

    /* Accent palette - electric cyan as primary */
    --accent: #58a6ff;
    --accent-emphasis: #79c0ff;
    --accent-muted: rgba(56, 139, 253, 0.4);
    --accent-subtle: rgba(56, 139, 253, 0.15);
    --accent-glow: rgba(56, 139, 253, 0.25);

    /* Status colors */
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --danger-fg: #ffa198;
    --info: #58a6ff;

    /* Transport / recording controls */
    --record: #f56565;
    --record-bg: rgba(229, 62, 62, 0.2);
    --record-bg-hover: rgba(229, 62, 62, 0.35);
    --record-hover: #fc8181;
    --record-glow: rgba(229, 62, 62, 0.25);
    --stop: #ecc94b;
    --stop-bg: rgba(236, 201, 75, 0.15);
    --stop-bg-hover: rgba(236, 201, 75, 0.3);
    --stop-hover: #f6e05e;
    --stop-glow: rgba(236, 201, 75, 0.2);
    --recording-badge: #e53e3e;

    /* Overlays */
    --overlay: rgba(0, 0, 0, 0.5);
    --overlay-heavy: rgba(0, 0, 0, 0.6);
    --selection-highlight: rgba(255, 255, 255, 0.06);

    /* Topology diagram */
    --topo-threads: rgba(63, 185, 80, 0.6);
    --topo-threads-emphasis: rgba(63, 185, 80, 0.9);
    --topo-cache: rgba(249, 115, 22, 0.6);
    --topo-numa: rgba(88, 166, 255, 0.6);
    --topo-numa-emphasis: rgba(88, 166, 255, 0.9);
    --topo-inset: rgba(22, 27, 34, 0.4);
    --topo-inset-deep: rgba(28, 33, 40, 0.6);
    --topo-inset-deeper: rgba(13, 17, 23, 0.5);

    /* On-accent foreground (text on filled accent/primary buttons) */
    --fg-on-accent: #fff;

    /* Gradients */
    --bg-card-gradient: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-void) 100%);

    /* Layout dimensions */
    --sidebar-width: 180px;
    --header-height: 56px;
    --content-padding: 24px;
    --card-radius: 8px;
    --card-radius-lg: 12px;

    /* Typography scale */
    --font-mono: "Berkeley Mono", "JetBrains Mono", "Fira Code", "SF Mono", monospace;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.8125rem;
    --font-size-base: 0.875rem;
    --font-size-lg: 1rem;
    --font-size-xl: 1.125rem;

    /* Transitions */
    --transition-fast: 0.1s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Chart-specific tokens (used by colormap.js via CSS variable reads) */
    --chart-area-top: rgba(88, 166, 255, 0.2);
    --chart-area-mid: rgba(88, 166, 255, 0.08);
    --chart-area-bottom: rgba(88, 166, 255, 0.01);
    --chart-grid-line: rgba(48, 54, 61, 0.5);
    --chart-shadow: rgba(0, 0, 0, 0.4);
    --chart-shadow-strong: rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   Light Theme
   ========================================================================== */

[data-theme="light"] {
    /* Background layers */
    --bg-void: #eaeef2;
    --bg: #f6f8fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f0f2f5;
    --bg-card: #ffffff;
    --bg-card-hover: #f3f5f8;
    --bg-elevated: #ffffff;
    --bg-card-gradient: var(--bg-card);

    /* Border hierarchy */
    --border-subtle: rgba(31, 35, 40, 0.12);
    --border-default: rgba(31, 35, 40, 0.2);
    --border-emphasis: rgba(9, 105, 218, 0.35);

    /* Foreground */
    --fg: #1f2328;
    --fg-secondary: #57606a;
    --fg-muted: #8c959f;
    --fg-subtle: #b0bbc5;

    /* Accent palette */
    --accent: #0969da;
    --accent-emphasis: #0550ae;
    --accent-muted: rgba(9, 105, 218, 0.3);
    --accent-subtle: rgba(9, 105, 218, 0.1);
    --accent-glow: rgba(9, 105, 218, 0.2);

    /* Status colors */
    --success: #1a7f37;
    --warning: #9a6700;
    --danger: #cf222e;
    --danger-fg: #cf222e;
    --info: #0969da;

    /* Transport / recording controls */
    --record: #cf222e;
    --record-bg: rgba(207, 34, 46, 0.1);
    --record-bg-hover: rgba(207, 34, 46, 0.18);
    --record-hover: #a40e26;
    --record-glow: rgba(207, 34, 46, 0.15);
    --stop: #9a6700;
    --stop-bg: rgba(154, 103, 0, 0.1);
    --stop-bg-hover: rgba(154, 103, 0, 0.18);
    --stop-hover: #7c5200;
    --stop-glow: rgba(154, 103, 0, 0.12);
    --recording-badge: #cf222e;

    /* Overlays */
    --overlay: rgba(0, 0, 0, 0.3);
    --overlay-heavy: rgba(0, 0, 0, 0.45);
    --selection-highlight: rgba(0, 0, 0, 0.06);

    /* Topology diagram */
    --topo-threads: rgba(26, 127, 55, 0.6);
    --topo-threads-emphasis: rgba(26, 127, 55, 0.9);
    --topo-cache: rgba(188, 82, 0, 0.6);
    --topo-numa: rgba(9, 105, 218, 0.6);
    --topo-numa-emphasis: rgba(9, 105, 218, 0.85);
    --topo-inset: rgba(208, 215, 222, 0.5);
    --topo-inset-deep: rgba(208, 215, 222, 0.7);
    --topo-inset-deeper: rgba(208, 215, 222, 0.4);

    /* On-accent foreground */
    --fg-on-accent: #fff;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(31, 35, 40, 0.08);
    --shadow-md: 0 4px 12px rgba(31, 35, 40, 0.12);
    --shadow-lg: 0 8px 24px rgba(31, 35, 40, 0.16);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Chart-specific tokens */
    --chart-area-top: rgba(9, 105, 218, 0.15);
    --chart-area-mid: rgba(9, 105, 218, 0.06);
    --chart-area-bottom: rgba(9, 105, 218, 0.0);
    --chart-grid-line: rgba(31, 35, 40, 0.12);
    --chart-shadow: rgba(31, 35, 40, 0.15);
    --chart-shadow-strong: rgba(31, 35, 40, 0.25);
}

/* In light theme, use a slightly stronger grid tint for visibility */
[data-theme="light"] body::before {
    background-image:
        linear-gradient(color-mix(in srgb, var(--accent) 2.5%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in srgb, var(--accent) 2.5%, transparent) 1px, transparent 1px);
}

[data-theme="light"] body::after {
    opacity: 0.015;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.5;
    min-height: 100vh;
}

/* Subtle grid pattern overlay for depth */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(color-mix(in srgb, var(--accent) 1.5%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in srgb, var(--accent) 1.5%, transparent) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: -1;
}

/* Noise texture for organic feel */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.02;
    pointer-events: none;
    z-index: -1;
}

/* ==========================================================================
   Top Navigation Bar
   ========================================================================== */

#topnav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg) 100%);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    padding: 0 var(--content-padding);
    z-index: 100;
    backdrop-filter: blur(12px);
}

#topnav .logo {
    font-family: var(--font-mono);
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--fg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

/* Logo mark - abstract waveform */
#topnav .logo::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-emphasis) 100%);
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M2 12h4l3-9 6 18 3-9h4' fill='none' stroke='white' stroke-width='2' stroke-linejoin='miter'/%3E%3C/svg%3E");
    mask-size: contain;
    mask-repeat: no-repeat;
}

#topnav .logo .live-indicator {
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--fg-on-accent);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
}

#topnav .logo .live-indicator.recording {
    background: var(--recording-badge);
    animation: live-pulse 2s ease-in-out infinite;
}

#topnav .logo .live-indicator.stopped {
    background: var(--fg-muted);
    animation: none;
}

@keyframes live-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Global time range bar */
.time-range-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.time-label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--fg);
    white-space: nowrap;
    user-select: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.2;
}

.time-label-date {
    color: var(--fg);
}

.time-label-input {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--fg);
    background: var(--bg-tertiary);
    border: 1px solid var(--accent);
    border-radius: 2px;
    padding: 1px 4px;
    width: 12ch;
    outline: none;
}

.time-track {
    width: 200px;
    flex-shrink: 0;
    height: 20px;
    background: var(--bg-void);
    border: 1px solid var(--border-default);
    border-radius: 3px;
    position: relative;
    cursor: crosshair;
    overflow: hidden;
}

.time-dim {
    position: absolute;
    top: 0;
    bottom: 0;
    background: var(--overlay);
    pointer-events: none;
}

.time-selection {
    position: absolute;
    top: 0;
    bottom: 0;
    background: var(--selection-highlight);
    cursor: grab;
    min-width: 2px;
}

.time-selection:active {
    cursor: grabbing;
}

.time-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--accent);
    cursor: ew-resize;
    z-index: 2;
    border-radius: 1px;
}

.time-handle-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    font-size: 10px;
    line-height: 1;
    color: var(--accent);
}

.time-handle-arrow-left {
    right: calc(100% + 1px);
}

.time-handle-arrow-right {
    left: calc(100% + 1px);
}

.time-handle-left {
    left: -2px;
}

.time-handle-right {
    right: -2px;
}

.time-reset-btn {
    padding: 2px 8px;
    background: var(--accent-subtle);
    color: var(--accent);
    border: 1px solid var(--accent-muted);
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    white-space: nowrap;
    transition: all var(--transition-base);
}

.time-reset-btn:hover {
    background: var(--accent-muted);
    color: var(--fg);
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.time-match-btn {
    padding: 2px 8px;
    background: transparent;
    color: var(--fg-secondary);
    border: 1px solid var(--border-default);
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    white-space: nowrap;
    transition: all var(--transition-base);
}

.time-match-btn:hover {
    background: var(--bg-elevated);
    color: var(--fg);
    border-color: var(--border-emphasis);
}

.granularity-selector {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 12px;
    margin-right: 4px;
    flex-shrink: 0;
}

.granularity-label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--fg-secondary);
    white-space: nowrap;
    user-select: none;
}

.granularity-select {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--fg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: 3px;
    padding: 2px 4px;
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition-base);
}

.granularity-select:hover {
    border-color: var(--accent-muted);
}

.granularity-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 4px var(--accent-glow);
}

#topnav .topnav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.topnav-source {
    position: relative;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--fg);
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 4px;
    border: 1px solid var(--border-subtle);
    margin-left: 1.5rem;
    cursor: pointer;
    user-select: none;
}

.topnav-source:hover {
    border-color: var(--border-default);
}

.topnav-source-chevron {
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 14px;
    color: var(--fg-secondary);
    transition: transform 0.15s ease;
}

.topnav-source-chevron.expanded {
    transform: rotate(180deg);
}

.topnav-meta-table {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    display: table;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    z-index: 200;
    white-space: nowrap;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border-spacing: 0;
}

.topnav-meta-row {
    display: table-row;
}

.topnav-meta-row span {
    display: table-cell;
    padding: 0.35rem 0.75rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
}

.topnav-meta-header span {
    color: var(--fg-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    font-size: 9px;
    border-bottom: 1px solid var(--border-subtle);
}

.topnav-meta-values span {
    color: var(--fg-secondary);
}

/* Transport controls group */
.transport-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#topnav .topnav-actions .transport-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 18px;
    line-height: 1;
}

#topnav .topnav-actions .transport-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Record button — red */
#topnav .topnav-actions .transport-btn.record-btn {
    background: var(--record-bg);
    color: var(--record);
}

#topnav .topnav-actions .transport-btn.record-btn:hover:not(:disabled) {
    background: var(--record-bg-hover);
    color: var(--record-hover);
    box-shadow: 0 0 12px var(--record-glow);
}

/* Stop button — amber */
#topnav .topnav-actions .transport-btn.stop-btn {
    background: var(--stop-bg);
    color: var(--stop);
}

#topnav .topnav-actions .transport-btn.stop-btn:hover:not(:disabled) {
    background: var(--stop-bg-hover);
    color: var(--stop-hover);
    box-shadow: 0 0 12px var(--stop-glow);
}

/* Save button — blue */
#topnav .topnav-actions .transport-btn.save-btn {
    background: var(--accent-subtle);
    color: var(--accent);
}

#topnav .topnav-actions .transport-btn.save-btn:hover {
    background: var(--accent-muted);
    color: var(--accent-emphasis);
    box-shadow: 0 0 12px var(--accent-glow);
}

#topnav .topnav-actions .transport-btn.import-btn {
    width: auto;
    max-width: 240px;
    padding: 0 0.75rem;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    background: var(--accent-subtle);
    color: var(--accent);
}


#topnav .topnav-actions .transport-btn.import-btn span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#topnav .topnav-actions .transport-btn.import-btn svg {
    flex-shrink: 0;
}

#topnav .topnav-actions .transport-btn.import-btn:hover {
    background: var(--accent-muted);
    color: var(--accent-emphasis);
    box-shadow: 0 0 12px var(--accent-glow);
}

#topnav .topnav-actions .transport-btn.import-btn.parquet-loaded {
    color: var(--success);
    border-color: color-mix(in srgb, var(--success) 40%, transparent);
}

#topnav .topnav-actions .transport-btn.import-btn.parquet-loaded:hover {
    background: color-mix(in srgb, var(--success) 15%, transparent);
    color: var(--success);
    box-shadow: 0 0 12px color-mix(in srgb, var(--success) 20%, transparent);
}

#topnav .theme-toggle-btn {
    padding: 0.4rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-left: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    color: var(--fg-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

#topnav .theme-toggle-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-muted);
    color: var(--fg);
    box-shadow: var(--shadow-glow);
}

#topnav .topnav-actions button {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    color: var(--fg-secondary);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition-base);
}

#topnav .topnav-actions button:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-muted);
    color: var(--fg);
    box-shadow: var(--shadow-glow);
}

#topnav .topnav-actions button:disabled {
    color: var(--fg-muted);
    cursor: not-allowed;
    opacity: 0.5;
    pointer-events: none;
}

/* ==========================================================================
   Main Layout
   ========================================================================== */

main {
    display: flex;
    min-height: calc(100vh - var(--header-height));
    margin-top: var(--header-height);
    position: relative;
    z-index: 1;
}

/* ==========================================================================
   Sidebar Navigation
   ========================================================================== */

#sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg) 100%);
    border-right: 1px solid var(--border-subtle);
    padding: 1.5rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    overflow-y: auto;
    z-index: 50;
}

#sidebar a {
    display: flex;
    align-items: center;
    padding: 0.625rem 1.25rem;
    color: var(--fg-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-base);
    border-left: 2px solid transparent;
    position: relative;
}

#sidebar a:hover {
    color: var(--fg);
    background: linear-gradient(90deg, var(--accent-subtle) 0%, transparent 100%);
    border-left-color: var(--fg-muted);
}

#sidebar a.selected {
    color: var(--accent);
    background: linear-gradient(90deg, var(--accent-subtle) 0%, transparent 100%);
    border-left-color: var(--accent);
    font-weight: 600;
}

#sidebar a.selected::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 70%;
    background: var(--accent);
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 12px var(--accent-glow);
}

#sidebar .sidebar-label {
    padding: 1.25rem 1.25rem 0.5rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--fg-muted);
}

#sidebar .sidebar-separator {
    margin: 1rem 1.25rem;
    border-top: 1px solid var(--border-subtle);
}

#sidebar .query-explorer-link {
    color: var(--fg-secondary);
    display: flex;
    align-items: center;
    margin-left: 0;
}

#sidebar .query-explorer-link .arrow {
    margin-right: 0.5rem;
    color: var(--accent);
    font-family: var(--font-mono);
    transition: transform var(--transition-base);
}

#sidebar .query-explorer-link:hover .arrow {
    transform: translateX(2px);
}

#sidebar .query-explorer-link.selected {
    color: var(--accent);
}

/* ==========================================================================
   Section Content
   ========================================================================== */

#section-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--content-padding);
    background: var(--bg);
    min-height: calc(100vh - var(--header-height));
    max-width: calc(100vw - var(--sidebar-width));
    overflow: hidden;
}

.section-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--fg);
    margin: 0;
    letter-spacing: -0.01em;
}

.section-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-action-btn {
    padding: 0.35rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--fg-secondary);
    border: 1px solid var(--border-default);
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.05em;
    white-space: nowrap;
    transition: all var(--transition-base);
}

.section-action-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--border-emphasis);
    color: var(--fg);
}

.section-action-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ==========================================================================
   Chart Groups
   ========================================================================== */

#groups {
    flex: 1;
}

#groups h2 {
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--fg);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#groups h2::before {
    content: '';
    width: 4px;
    height: 16px;
    background: linear-gradient(180deg, var(--accent) 0%, var(--chart-cyan) 100%);
    border-radius: 2px;
}

.group {
    margin-bottom: 2.5rem;
}

.group .charts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

/* ==========================================================================
   Chart Cards
   ========================================================================== */

.chart {
    height: 270px;
    overflow: hidden;
    position: relative;
}

.chart.no-data {
    height: 0;
    border: none;
    background: none;
}

.chart.no-data > div {
    display: none !important;
}

.chart-wrapper:has(.no-data) {
    min-height: 40px;
}

.chart-wrapper:has(.no-data) .chart-header {
    opacity: 0.5;
}

.chart-wrapper:has(.no-data):hover {
    border-color: var(--border-default);
    box-shadow: none;
}

.chart-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 10px 16px 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    z-index: 2;
    pointer-events: none;
}

.chart-header > * {
    pointer-events: auto;
}

.chart-title {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--fg);
    user-select: text;
    width: fit-content;
}

.chart-subtitle {
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: normal;
    color: var(--fg-muted);
    user-select: text;
    width: fit-content;
}

.chart-wrapper {
    position: relative;
    min-width: 0;
    overflow: hidden;
    background: var(--bg-card-gradient);
    border: 1px solid var(--border-default);
    border-radius: var(--card-radius);
    transition: all var(--transition-base);
}

.chart-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 3%, transparent) 0%, transparent 30%);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.chart-wrapper:hover {
    border-color: var(--border-emphasis);
    box-shadow:
        var(--shadow-lg),
        0 0 0 1px var(--accent-subtle),
        inset 0 1px 0 color-mix(in srgb, var(--fg-on-accent) 2%, transparent);
}

.chart-wrapper:hover::before {
    opacity: 1;
}

.chart-expand {
    position: absolute;
    bottom: 2px;
    left: 16px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--fg-muted);
    text-decoration: none;
    opacity: 0;
    transition: opacity var(--transition-base), color var(--transition-base);
    display: flex;
    align-items: center;
    gap: 3px;
    z-index: 10;
}

.chart-wrapper:hover .chart-expand {
    opacity: 0.6;
}

.chart-expand:hover {
    opacity: 1 !important;
    color: var(--fg);
}

.chart-select {
    position: absolute;
    bottom: 2px;
    right: 16px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    color: var(--fg-muted);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    padding: 2px 8px;
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition-base);
    z-index: 10;
}

.chart-wrapper:hover .chart-select {
    opacity: 0.6;
}

.chart-select:hover {
    opacity: 1 !important;
    color: var(--fg);
    border-color: var(--accent-muted);
    background: var(--accent-subtle);
}

.chart-selected {
    opacity: 0.8 !important;
    color: var(--accent);
    border-color: var(--accent-muted);
    background: var(--accent-subtle);
}

.chart-wrapper:hover .chart-selected {
    opacity: 1;
}

/* ==========================================================================
   Single Chart View
   ========================================================================== */

.single-chart-main {
    flex: 1;
    padding: var(--content-padding);
}

.single-chart-view {
    width: 70%;
    margin: 0 auto;
}

.single-chart-container .chart {
    height: 500px;
}

.single-chart-fields {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
}

.single-chart-field {
    flex: 1;
}

.single-chart-field label,
.single-chart-query label {
    display: block;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--fg-muted);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.field-input,
.query-input {
    width: 100%;
    padding: 1rem;
    background: var(--bg-void);
    color: var(--fg);
    border: 1px solid var(--border-default);
    border-radius: var(--card-radius);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    transition: all var(--transition-base);
}

.field-input:focus,
.query-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow:
        0 0 0 3px var(--accent-subtle),
        var(--shadow-glow);
}

.field-input::placeholder,
.query-input::placeholder {
    color: var(--fg-muted);
}

.field-input-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.field-input-row .field-input {
    flex: 1;
}

.field-apply-btn {
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--fg-secondary);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    white-space: nowrap;
    transition: all var(--transition-base);
}

.field-apply-btn:hover {
    background: var(--bg-card);
    color: var(--fg);
    border-color: var(--border-emphasis);
}

.single-chart-query {
    margin-top: 1rem;
}

/* ==========================================================================
   Query Explorer
   ========================================================================== */

.query-explorer {
    padding: 0;
    max-width: 100%;
}

.query-input-section {
    margin-bottom: 1.5rem;
}

.query-input-section h2 {
    font-family: var(--font-mono);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--fg);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.query-input-section h2::before {
    content: '>';
    color: var(--accent);
    font-weight: 400;
}

.query-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.query-input {
    min-height: 120px;
    resize: vertical;
}

.execute-btn {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(180deg, var(--accent) 0%, var(--accent-emphasis) 100%);
    color: var(--bg-void);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: 0.02em;
    align-self: flex-start;
    transition: all var(--transition-base);
    box-shadow: 0 2px 8px var(--accent-muted);
}

.execute-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow:
        0 4px 16px var(--accent-muted),
        0 0 24px var(--accent-glow);
}

.execute-btn:active:not(:disabled) {
    transform: translateY(0);
}

.execute-btn:disabled {
    background: var(--bg-tertiary);
    color: var(--fg-muted);
    cursor: not-allowed;
    box-shadow: none;
}

.query-history {
    margin-top: 1.25rem;
}

.query-history h3,
.example-queries h3,
.selector-column h4 {
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--fg-muted);
}

.history-select {
    width: 100%;
    padding: 0.625rem;
    background: var(--bg-card);
    color: var(--fg);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

.error-message {
    background: linear-gradient(180deg, color-mix(in srgb, var(--danger) 15%, transparent) 0%, color-mix(in srgb, var(--danger) 5%, transparent) 100%);
    border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
    color: var(--danger-fg);
    padding: 1rem;
    border-radius: var(--card-radius);
    margin: 1rem 0;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
}

.query-result {
    margin-top: 1.5rem;
}

.query-result h3 {
    margin-bottom: 1rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--fg);
}

.query-chart {
    background: var(--bg-card-gradient);
    border: 1px solid var(--border-default);
    border-radius: var(--card-radius);
    height: 336px;
}

.example-queries {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-card-gradient);
    border: 1px solid var(--border-subtle);
    border-radius: var(--card-radius);
}

.example-queries h3 {
    margin-bottom: 1rem;
}

.example-queries ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.example-queries li {
    font-size: var(--font-size-sm);
    color: var(--fg-secondary);
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
}

.example-queries code {
    display: inline-block;
    padding: 0.4rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--accent);
    border-radius: 4px;
    border: 1px solid var(--border-subtle);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    transition: all var(--transition-base);
}

.example-queries code:hover {
    background: var(--accent-subtle);
    border-color: var(--accent-muted);
    box-shadow: 0 0 12px var(--accent-glow);
}

/* ==========================================================================
   Cgroups Section
   ========================================================================== */

.cgroups-section {
    width: 100%;
}

.cgroup-pairs {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.cgroup-pair-header {
    display: flex;
    flex-direction: column;
    margin-bottom: 0.75rem;
}

.cgroup-pair-header .chart-title {
    font-size: var(--font-size-base);
    font-weight: 600;
}

.cgroup-pair-header .chart-subtitle {
    font-size: var(--font-size-xs);
    color: var(--fg-muted);
}

.cgroup-pair-charts {
    display: flex;
    gap: 1.5rem;
}

.cgroup-chart {
    flex: 1;
    min-width: 0;
}

.cgroup-chart-label {
    display: block;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--fg-muted);
    margin: 0.25rem 0 0 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cgroup-pair-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    padding: 0.25rem 0.5rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--fg-secondary);
}

.cgroup-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.cgroup-legend-swatch {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    flex-shrink: 0;
}

.cgroup-selector {
    background: var(--bg-card-gradient);
    border: 1px solid var(--border-subtle);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.cgroup-selector h3 {
    margin-bottom: 1rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--fg);
}

.cgroup-selector .error-message {
    background: color-mix(in srgb, var(--danger) 10%, transparent);
    border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
    color: var(--danger-fg);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: var(--font-size-sm);
}

.cgroup-list .loading,
.cgroup-list .empty {
    padding: 1rem;
    text-align: center;
    color: var(--fg-secondary);
    font-family: var(--font-mono);
}

.selector-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.selector-column {
    flex: 1;
}

.selector-column h4 {
    color: var(--fg-muted);
}

.cgroup-select {
    width: 100%;
    min-height: 8.5rem;
    background: var(--bg-card);
    color: var(--fg);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    padding: 0.5rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
}

.cgroup-select option {
    padding: 0.375rem 0.5rem;
}

.cgroup-select option:checked {
    background: var(--accent);
    color: var(--bg-void);
}

.cgroup-select option[disabled] {
    color: var(--fg-muted);
    font-style: italic;
}

.selector-controls {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 0.375rem;
    padding: 1.85rem 0.5rem 0;
    align-self: stretch;
}

.selector-controls button {
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--fg);
    border: 1px solid var(--border-default);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    font-weight: 600;
    min-width: 44px;
}

.selector-controls button:hover:not(:disabled) {
    background: var(--accent);
    color: var(--bg-void);
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.selector-controls button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Arrow direction toggling: show horizontal by default, vertical on mobile */
.selector-controls button .arrow-ud {
    display: none;
}

.selector-info {
    margin-top: 0.75rem;
    text-align: center;
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
}

/* ==========================================================================
   System Info Section
   ========================================================================== */

.systeminfo-section {
    padding: 0;
}

.systeminfo-empty {
    color: var(--fg-muted);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    margin-top: 1rem;
}

.sysinfo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.sysinfo-group {
    background: var(--bg-card-gradient);
    border: 1px solid var(--border-default);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    transition: border-color var(--transition-base);
}

.sysinfo-group:hover {
    border-color: var(--border-emphasis);
}

.sysinfo-group-title {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--fg);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sysinfo-group-title::before {
    content: '';
    width: 3px;
    height: 14px;
    background: var(--accent);
    border-radius: 2px;
}

.sysinfo-table {
    width: 100%;
    border-collapse: collapse;
}

.sysinfo-table tr + tr {
    border-top: 1px solid var(--border-subtle);
}

.sysinfo-label {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--fg-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.5rem 1rem 0.5rem 0;
    white-space: nowrap;
    width: 1%;
}

.sysinfo-value {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--fg-secondary);
    padding: 0.5rem 0;
}

.sysinfo-raw {
    margin-top: 1.5rem;
}

.sysinfo-raw .sysinfo-group-title {
    margin-bottom: 0.75rem;
}

.sysinfo-json {
    background: var(--bg-void);
    border: 1px solid var(--border-default);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--fg-secondary);
    line-height: 1.6;
    overflow-x: auto;
    max-height: 600px;
    overflow-y: auto;
    user-select: text;
}

/* Service section heading */
#section-content > h1 {
    margin-bottom: 1.5rem;
}

/* Service notes — unavailable KPIs */
.service-notes {
    margin-top: 2rem;
    padding: 1rem 1.25rem;
    background: var(--bg-void);
    border: 1px solid var(--border-default);
    border-radius: var(--card-radius);
    color: var(--fg-muted);
    font-size: var(--font-size-sm);
}

.service-notes h3 {
    margin: 0 0 0.5rem;
    font-size: var(--font-size-sm);
    color: var(--fg-secondary);
}

.service-notes p {
    margin: 0 0 0.5rem;
}

.service-notes ul {
    margin: 0;
    padding-left: 1.25rem;
}

.service-notes li {
    margin-bottom: 0.25rem;
}

/* Sidebar systeminfo link — same style as query explorer link */
#sidebar .systeminfo-link {
    color: var(--fg-secondary);
    display: flex;
    align-items: center;
}

#sidebar .systeminfo-link .arrow {
    margin-right: 0.5rem;
    color: var(--accent);
    font-family: var(--font-mono);
    transition: transform var(--transition-base);
}

#sidebar .systeminfo-link:hover .arrow {
    transform: translateX(2px);
}

#sidebar .systeminfo-link.selected {
    color: var(--accent);
}

/* ==========================================================================
   CPU Topology Diagram
   ========================================================================== */

.topo-canvas {
    margin-top: 1.5rem;
    background: var(--bg-card-gradient);
    border: 1px solid var(--border-default);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.topo-inner {
    display: inline-flex;
    flex-direction: column;
    align-items: stretch;
}

/* Toggle chips */
.topo-toggles {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.topo-toggle {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    border: 1px solid transparent;
    background: var(--bg-elevated);
    color: var(--fg-muted);
    cursor: pointer;
    transition: all var(--transition-base);
}

.topo-toggle:hover { color: var(--fg-secondary); }
.topo-toggle.active { color: var(--fg); }

.topo-toggle-threads.active { border-color: var(--topo-threads); }
.topo-toggle-caches.active  { border-color: var(--topo-cache); }
.topo-toggle-numa.active    { border-color: var(--topo-numa); }

/* Packages container */
.topo-packages {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

/* Package */
.topo-package {
    border: var(--topo-border, 2px) solid var(--border-default);
    border-radius: var(--card-radius);
    padding: 0.75rem;
    background: var(--bg-void);
}

.topo-package-header {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--fg);
    margin-bottom: 0.5rem;
}

/* NUMA grid — 1 or 2 columns driven by JS via --topo-numa-cols */
.topo-numa-grid {
    display: grid;
    grid-template-columns: repeat(var(--topo-numa-cols, 1), auto);
    gap: 12px;
}

/* NUMA box */
.topo-numa-box {
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    padding: 0.5rem;
}

.topo-numa-box.numa-highlighted {
    border-color: var(--topo-numa);
}

.topo-numa-header {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--topo-numa-emphasis);
    margin-bottom: 0.35rem;
}

/* LLC groups within a NUMA node */
.topo-llc-groups {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.topo-llc-group {
    display: grid;
    gap: var(--topo-border, 2px);
    flex: 1 1 0;
}

/* Wrapped LLC group: explicit row packing (no CSS flex-wrap) */
.topo-llc-group-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.topo-llc-row {
    display: flex;
    gap: 8px;
}

.topo-subgroup-grid {
    display: grid;
    gap: var(--topo-border, 2px);
}

/* Core cell */
.topo-core {
    background: var(--bg);
    border: var(--topo-border, 2px) solid var(--topo-threads);
    border-radius: 3px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 8px;
    min-width: 0;
    padding: 4px 2px;
    transition: border-color var(--transition-base);
}

.topo-core:hover {
    border-color: var(--topo-threads-emphasis);
}

.core-id {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    color: var(--fg);
    line-height: 1;
}

/* Thread sub-cells */
.topo-threads {
    display: flex;
    gap: 1px;
    margin-top: 2px;
}

.topo-thread {
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--fg);
    background: var(--bg-elevated);
    border-radius: 2px;
    padding: 0 2px;
    line-height: 1.3;
}

/* L1 pair — orange outline box per core */
.topo-l1-pair {
    display: flex;
    gap: 2px;
    justify-content: center;
    align-items: center;
    background: var(--topo-inset);
    border: var(--topo-border, 2px) solid var(--topo-cache);
    border-radius: 3px;
    padding: 3px 4px;
    min-width: 0;
    overflow: hidden;
}

/* Compact L1 — outline only, no content */
.topo-l1-pair.compact {
    min-height: 6px;
    padding: 2px;
}

.topo-l1 {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--fg);
    background: var(--topo-inset-deep);
    border-radius: 2px;
    padding: 2px 4px;
    line-height: 1.4;
}

/* Cache bars — span their cores (orange outline) */
.topo-cache-bar {
    border: var(--topo-border, 2px) solid var(--topo-cache);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    padding: 3px 6px;
    min-width: 0;
    overflow: hidden;
}

.topo-cache-name {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    color: var(--fg);
    line-height: 1.2;
}

.topo-cache-size {
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--fg-secondary);
    line-height: 1.2;
}

.topo-mid-cache {
    background: var(--topo-inset);
    border-radius: 3px;
}

.topo-llc {
    background: var(--topo-inset-deeper);
    border-radius: 4px;
}

/* ── Legend (shown when labels are omitted) ───────────────────────── */

.topo-legend {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
    overflow-x: auto;
}

.topo-legend-title {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--fg-secondary);
    margin-bottom: 0.5rem;
}

.topo-legend-cluster {
    display: inline-flex;
    flex-direction: column;
    gap: 2px;
}

.topo-legend-cluster .topo-subgroups {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
}

.topo-legend-cluster .topo-subgroup {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.topo-legend-cluster .topo-core-row {
    display: flex;
    gap: 2px;
}

.topo-legend-cluster .topo-cache-bar {
    width: auto;
}

/* ── Descriptions ─────────────────────────────────────────────────── */

.topo-descriptions {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
}

.topo-desc {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--fg-secondary);
    line-height: 1.6;
    margin-bottom: 0.35rem;
}

/* ==========================================================================
   Scrollbar Styling
   ========================================================================== */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
    border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--fg-muted);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--bg-tertiary) var(--bg);
}

/* ==========================================================================
   Selection Section
   ========================================================================== */

.selection-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.selection-tagline-sep {
    color: var(--fg-muted);
    font-size: 1.2rem;
}

.selection-tagline {
    flex: 1;
    background: transparent;
    border: 1px solid transparent;
    border-bottom-color: var(--border-default);
    color: var(--fg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 4px 8px;
    transition: border-color var(--transition-base);
}

.selection-tagline:focus {
    outline: none;
    border-color: var(--accent-muted);
}

.selection-tagline::placeholder {
    color: var(--fg-muted);
    opacity: 0.5;
}

.selection-actions {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.selection-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: var(--accent-subtle);
    color: var(--accent);
    border: 1px solid var(--accent-muted);
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    transition: all var(--transition-base);
}

.selection-btn:hover {
    background: var(--accent-muted);
    color: var(--fg);
    border-color: var(--accent);
}

.selection-btn-danger {
    background: transparent;
    color: var(--fg-muted);
    border-color: var(--border-default);
}

.selection-btn-danger:hover {
    background: color-mix(in srgb, var(--danger) 15%, transparent);
    color: var(--danger);
    border-color: var(--danger);
}

.save-modal-input-row + .save-modal-options {
    margin-top: -11px;
}

.save-modal-options {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 1rem;
    padding-left: 2px;
}

.save-modal-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--fg-secondary);
    cursor: pointer;
    user-select: none;
}

.save-modal-checkbox input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
    accent-color: var(--accent-muted);
    background: var(--bg-tertiary);
}

.selection-card {
    border: 1px solid var(--border-default);
    border-radius: 8px;
    background: var(--bg-surface);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.selection-card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 8px 16px;
    background: var(--bg-inset);
    border-bottom: 1px solid var(--border-default);
    font-family: var(--font-mono);
    font-size: 12px;
}

.selection-card-section-link {
    color: var(--accent);
    text-decoration: none;
}

.selection-card-section-link:hover {
    text-decoration: underline;
}

.selection-card-sep {
    color: var(--fg-muted);
}

.selection-card-title {
    color: var(--fg);
}

.selection-card-desc {
    color: var(--fg-muted);
    font-size: 0.85em;
    flex: 1;
}

.selection-card-remove {
    background: transparent;
    border: none;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    color: var(--fg-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    padding: 0;
    margin-bottom: 6px;
    transition: color var(--transition-base);
}

.selection-card-remove:hover {
    color: var(--danger);
}

.selection-card-body {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
}

.selection-card-chart {
    flex: 1 1 calc(50% - 1rem);
    max-width: calc(50% - 1rem);
    min-width: 300px;
    padding: 12px;
}

.selection-card-chart .chart {
    height: 250px;
}

.selection-card-notes {
    flex: 1 1 200px;
    display: flex;
    flex-direction: column;
    padding: 12px;
    border-left: 1px solid var(--border-default);
}

.selection-notes-label {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    color: var(--fg-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.selection-notes {
    flex: 1;
    min-height: 120px;
    background: var(--bg-void);
    border: 1px solid var(--border-default);
    border-radius: 4px;
    color: var(--fg);
    font-family: var(--font-mono);
    font-size: 12px;
    padding: 8px;
    resize: vertical;
    transition: border-color var(--transition-base);
}

.selection-notes:focus {
    outline: none;
    border-color: var(--accent-muted);
}

.selection-notes::placeholder {
    color: var(--fg-muted);
    opacity: 0.5;
}

.selection-tagline-text {
    color: var(--fg-secondary);
    font-size: 1rem;
    margin: 0.25rem 0 0 0;
    padding: 0;
}

.selection-notes-text {
    color: var(--fg-default);
    font-size: 0.85rem;
    line-height: 1.5;
    margin: 0;
    padding: 0;
    white-space: pre-wrap;
}

.selection-link {
    font-weight: 600 !important;
}

.report-link {
    color: var(--success) !important;
}

/* Report metadata */
.report-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.5rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--fg-secondary);
    margin: 0.25rem 0 0.5rem;
    line-height: 1.6;
}

.report-meta-label {
    color: var(--fg-muted);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

#toast-container {
    position: fixed;
    top: calc(var(--header-height) + 8px);
    right: 16px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--fg);
    border: 1px solid var(--border-default);
    background: var(--bg-elevated);
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    max-width: 400px;
}

.toast-visible {
    opacity: 1;
    transform: translateX(0);
}

.toast-info   { border-left: 3px solid var(--info); }
.toast-warn   { border-left: 3px solid var(--warning); }
.toast-error  { border-left: 3px solid var(--danger); }

.toast-dismiss {
    background: none;
    border: none;
    color: var(--fg-muted);
    font-size: 14px;
    cursor: pointer;
    padding: 0 2px;
    margin-left: auto;
    line-height: 1;
}

.toast-dismiss:hover {
    color: var(--fg);
}

/* ==========================================================================
   Save-As Modal
   ========================================================================== */

.save-modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--overlay-heavy);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.save-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--card-radius-lg);
    padding: 1.5rem;
    min-width: 380px;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
}

.save-modal-title {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--fg);
    margin-bottom: 1rem;
}

.save-modal-input-row {
    display: flex;
    align-items: center;
    background: var(--bg-void);
    border: 1px solid var(--border-default);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.save-modal-input-row:focus-within {
    border-color: var(--accent-muted);
}

.save-modal-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--fg);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    padding: 8px 10px;
    outline: none;
    min-width: 0;
}

.save-modal-suffix {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--fg-muted);
    padding: 8px 10px 8px 0;
    user-select: none;
    flex-shrink: 0;
}

.save-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

.save-modal-btn {
    padding: 6px 16px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-default);
    transition: all var(--transition-base);
}

.save-modal-cancel {
    background: transparent;
    color: var(--fg-secondary);
}

.save-modal-cancel:hover {
    background: var(--bg-tertiary);
    color: var(--fg);
}

.save-modal-confirm {
    background: var(--accent-subtle);
    color: var(--accent);
    border-color: var(--accent-muted);
}

.save-modal-confirm:hover:not(:disabled) {
    background: var(--accent-muted);
    color: var(--fg);
}

.save-modal-confirm:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Print-only header (hidden on screen) */

/* ==========================================================================
   Mobile hamburger button (hidden on desktop)
   ========================================================================== */

.hamburger-btn {
    display: none;
    background: none;
    border: none;
    color: var(--fg-secondary);
    padding: 0.5rem;
    cursor: pointer;
    line-height: 1;
    flex-shrink: 0;
}

.hamburger-btn:hover {
    color: var(--fg);
}

/* Sidebar backdrop overlay (mobile only) */
.sidebar-backdrop {
    display: none;
}

/* ==========================================================================
   Narrow viewport — single-column charts, sidebar stays (<1200px)
   ========================================================================== */

@media (max-width: 1199px) {
    .group .charts {
        grid-template-columns: 1fr;
    }

    .sysinfo-grid {
        grid-template-columns: 1fr;
    }

    .cgroup-pair-charts {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Touch / mobile devices: hide chart action buttons and add scroll gutter */
@media (pointer: coarse) {
    .chart-expand,
    .chart-select {
        display: none !important;
        pointer-events: none;
    }

    /* Extra right padding so users can scroll without accidentally
       triggering chart zoom on the dataZoom drag area */
    #section-content {
        padding-right: 40px;
    }
}

/* ==========================================================================
   Mobile / Responsive (<768px)
   ========================================================================== */

@media (max-width: 767px) {
    :root {
        --content-padding: 12px;
    }

    /* ── Top navigation ── */
    #topnav {
        flex-wrap: wrap;
        height: auto;
        min-height: var(--header-height);
        padding: 0.5rem 0.75rem;
        gap: 0.25rem 0.5rem;
    }

    .hamburger-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        order: -1;
    }

    #topnav .logo {
        font-size: var(--font-size-base);
    }

    /* Show filename but hide expandable metadata on mobile */
    .topnav-source {
        pointer-events: none;
        overflow: hidden;
        text-overflow: ellipsis;
        min-width: 0;
        flex: 1;
    }

    .topnav-source-chevron,
    .topnav-meta-table {
        display: none;
    }

    /* Shrink transport buttons */
    #topnav .topnav-actions {
        gap: 0.375rem;
    }

    #topnav .topnav-actions .transport-btn.import-btn span {
        display: none;
    }

    #topnav .topnav-actions .transport-btn.import-btn {
        width: 32px;
        padding: 0;
    }

    /* Time range bar shares row with granularity + theme on mobile */
    .time-range-bar {
        margin-left: 0;
        margin-right: 0;
        gap: 4px;
    }

    .time-track {
        width: 120px;
    }

    .granularity-selector {
        margin-left: auto;
        margin-right: 0;
    }

    /* ── Sidebar as slide-out drawer ── */
    #sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-slow);
        z-index: 200;
        box-shadow: none;
    }

    #sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

    .sidebar-backdrop {
        position: fixed;
        inset: 0;
        background: var(--overlay);
        z-index: 199;
    }

    .sidebar-backdrop.visible {
        display: block;
    }

    /* ── Main content full-width ── */
    #section-content {
        margin-left: 0;
        max-width: 100vw;
    }

    /* ── Section header stacks vertically ── */
    .section-header-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    /* ── Cgroup pairs: stack charts vertically on mobile ── */
    .cgroup-pair-charts {
        flex-direction: column;
        gap: 1rem;
    }

    /* ── Cgroup selector: stack vertically, horizontal controls ── */
    .selector-container {
        flex-direction: column;
    }


    .selector-controls {
        flex-direction: row;
        justify-content: center;
        padding: 0;
    }

    .selector-controls button .arrow-lr {
        display: none;
    }

    .selector-controls button .arrow-ud {
        display: inline;
    }

    /* ── Charts: single column ── */
    .group .charts {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* Chart action buttons already hidden by pointer:coarse rule */

    /* ── Single chart (expanded) view ── */
    .single-chart-view {
        width: 100%;
    }

    /* ── Hide Query Explorer on mobile ── */
    .query-explorer {
        display: none;
    }

    #sidebar .query-explorer-link {
        display: none;
    }

    /* ── System Info grid: single column ── */
    .sysinfo-grid {
        grid-template-columns: 1fr;
    }

    .sysinfo-table {
        overflow-x: auto;
    }

    /* ── Selection cards: stack vertically ── */
    .selection-card-body {
        flex-direction: column;
    }

    .selection-card-chart {
        flex: 1 1 100%;
        max-width: 100%;
    }

    .selection-card-notes {
        flex: 1 1 auto;
    }
}

/* ---- Landing / File Upload Page ---- */

.upload-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

.upload-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: 12px;
    padding: 3rem;
    max-width: 520px;
    width: 100%;
    text-align: center;
}

.upload-title {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
    color: var(--fg);
}

.upload-subtitle {
    color: var(--fg-secondary);
    margin: 0 0 0.25rem;
    font-size: 0.95rem;
}

.upload-privacy {
    color: var(--accent);
    margin: 0 0 2rem;
    font-size: 0.85rem;
    font-weight: 500;
}

.upload-dropzone {
    border: 2px dashed var(--border-default);
    border-radius: 8px;
    padding: 2.5rem 1.5rem;
    transition: border-color 0.15s, background 0.15s;
    cursor: pointer;
}

.upload-dropzone.dragover {
    border-color: var(--accent);
    background: var(--accent-subtle);
}

.upload-icon {
    color: var(--fg-muted);
    margin-bottom: 1rem;
}

.upload-dropzone p {
    margin: 0.25rem 0;
    color: var(--fg-secondary);
    font-size: 0.9rem;
}

.upload-or {
    font-size: 0.8rem;
    color: var(--fg-secondary);
    opacity: 0.6;
}

.upload-btn {
    display: inline-block;
    margin-top: 0.75rem;
    padding: 0.5rem 1.5rem;
    background: var(--accent);
    color: var(--fg-on-accent);
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
}

.upload-btn:hover {
    opacity: 0.85;
}

.upload-error {
    color: var(--danger);
    margin-top: 1rem;
    font-size: 0.85rem;
}

.upload-loading {
    color: var(--accent);
    margin-top: 1rem;
    font-size: 0.85rem;
}

/* ---- Connect to Live Agent ---- */

.upload-connect {
    margin-top: 1.5rem;
    text-align: center;
}

.upload-connect-label {
    color: var(--fg-secondary);
    font-size: 0.9rem;
    margin: 0 0 0.25rem;
}

.connect-input {
    display: block;
    width: 100%;
    margin-top: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-void);
    color: var(--fg);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
    outline: none;
    transition: border-color 0.15s;
    text-align: center;
}

.connect-input:focus {
    border-color: var(--accent);
}

.connect-input::placeholder {
    color: var(--fg-muted);
    opacity: 0.6;
}