/* ═══════════════════════════════════════════════════════════════
   DEVELOPER-FIRST IDE DESIGN SYSTEM — WHAT THE BUG (PRODUCTION)
   Dual theme, custom fonts, Prism.js integration & bright terminal
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300;1,400;1,500;1,600;1,700&family=JetBrains+Mono:wght@400;500;600;700&family=Space+Mono:ital,wght@0,400;0,700;1,400;1,700&family=Caveat:wght@400;700&display=swap');

/* ── Global Custom Properties ───────────────────────────────── */
:root {
    /* Fonts */
    --font-heading: 'Space Mono', monospace;
    --font-body: 'IBM Plex Mono', -apple-system, BlinkMacSystemFont, monospace;
    --font-code: 'IBM Plex Mono', monospace;

    /* Theme Variables (Default is Dark Mode) */
    --bg-void: #050b14;          /* Absolute background */
    --bg-primary: rgba(10, 15, 25, 0.6);       /* Main panel/editor background */
    --bg-secondary: rgba(5, 11, 20, 0.7);     /* Sidebar & Header background */
    --bg-card: rgba(15, 25, 40, 0.5);          /* Card background */
    --bg-card-hover: rgba(25, 40, 60, 0.8);
    --bg-code: rgba(3, 7, 12, 0.8);          /* Code blocks / compiler logs background */
    --bg-input: rgba(10, 20, 35, 0.5);
    --bg-overlay: rgba(13, 17, 23, 0.85);

    --border-color: rgba(0, 255, 255, 0.2);     /* High-contrast divider borders */
    --border-subtle: rgba(0, 255, 255, 0.1);
    --border-glow: rgba(0, 240, 255, 0.2);

    --text-primary: #e0f2fe;     /* Highly legible primary text */
    --text-secondary: #8b949e;   /* Secondary descriptive text */
    --text-muted: #57606a;       /* Muted annotations */
    --text-code: #58a6ff;

    /* Accent colors (vibrant but professional) */
    --neon-cyan: #00ffff;
    --neon-magenta: #f000ff;
    --neon-purple: #9d4edd;
    --neon-green: #39ff14;
    --neon-orange: #ff7f00;
    --neon-red: #ff3366;
    --neon-yellow: #ffe600;
    --neon-blue: #00a8ff;

    --gradient-hero: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple) 100%);
    --shadow-card: 0 8px 32px 0 rgba(0, 255, 255, 0.15);
    --shadow-glow: 0 0 15px rgba(0, 255, 255, 0.8), 0 0 30px rgba(0, 255, 255, 0.4);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;

    --t-fast: 0.15s;
    --t-normal: 0.25s;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── Light Theme (Warm Cream) ───────────────────────────────── */
html.light {
    --bg-void: #f8f7f2;          /* Warm cream body background */
    --bg-primary: #ffffff;       /* Pure white main containers */
    --bg-secondary: #f3efe6;     /* Shaded sidebar & header panels */
    --bg-card: #f8f7f2;
    --bg-card-hover: #ffffff;
    --bg-code: #161b22;          /* Editor/Console stays dark for syntax visibility */
    --bg-input: #ffffff;
    --bg-overlay: rgba(243, 239, 230, 0.85);

    --border-color: #d8d3c5;     /* Warm grey borders */
    --border-subtle: #e5dec9;
    --border-glow: rgba(194, 65, 12, 0.2);

    --text-primary: #1c1917;     /* Charcoal brown text */
    --text-secondary: #57534e;   /* Soft slate text */
    --text-muted: #a8a29e;       /* Light stone text */
    --text-code: #3fb950;

    --neon-cyan: #098ca3;        /* Slightly darker accents for readability */
    --neon-magenta: #b5179e;
    --neon-purple: #7209b7;
    --neon-green: #166534;
    --neon-orange: #c2410c;
    --neon-red: #991b1b;
    --neon-yellow: #a16207;
    --neon-blue: #1d4ed8;

    --gradient-hero: linear-gradient(135deg, #098ca3 0%, #7209b7 100%);
    --shadow-card: 0 4px 20px rgba(28, 25, 23, 0.05);
    --shadow-glow: 0 0 15px rgba(9, 140, 163, 0.1);
}

/* ── Base Resets ────────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 15px;
    height: 100%;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.92rem;
    line-height: 1.6;
    letter-spacing: -0.02em; /* Tight letter-spacing for the mono/sans hybrid style */
    background: var(--bg-void);
    background-image: linear-gradient(rgba(0, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    color: var(--text-primary);
    overflow: hidden;
    height: 100%;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--neon-cyan);
    box-shadow: 0 0 5px var(--neon-cyan);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.025em; /* Custom spacing for Space Mono headings */
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

h1 { font-size: 1.8rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; }

a {
    color: var(--neon-cyan);
    text-decoration: none;
    transition: color var(--t-fast) var(--ease-out);
}
a:hover {
    color: var(--neon-magenta);
    text-decoration: underline;
}

pre, code, .mono {
    font-family: var(--font-code);
    font-size: 0.85rem;
}

/* ── Workspace Core Structure (3 Panels) ─────────────────────── */
.workspace-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* Top Navbar */
.app-header {
    height: 48px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    flex-shrink: 0;
    z-index: 10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.app-logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.app-logo span {
    color: var(--neon-cyan);
}

.header-links a {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: all var(--t-fast) ease;
}
.header-links a:hover, .header-links a.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    text-decoration: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Sub-Header bar */
.sub-header {
    height: 38px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    gap: 1rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
    flex-shrink: 0;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.sub-header-nav {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.sub-header-btn {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--t-fast) ease;
}
.sub-header-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.breadcrumbs {
    font-family: var(--font-code);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.breadcrumbs span.separator {
    color: var(--text-muted);
}

/* Main row of panels */
.workspace-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Workspace Resizers (Vertical & Horizontal) */
.resizer-v {
    height: 8px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    cursor: row-resize;
    flex-shrink: 0;
    transition: background 0.15s ease;
    position: relative;
    z-index: 20;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
}
.resizer-v:hover, .resizer-v.dragging {
    background: rgba(88, 166, 255, 0.25);
    border-color: var(--neon-cyan);
}
.resizer-v::after {
    content: '';
    width: 36px;
    height: 3px;
    background: var(--text-muted);
    border-radius: 2px;
    opacity: 0.7;
}

.resizer-h {
    width: 8px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    cursor: col-resize;
    flex-shrink: 0;
    transition: background 0.15s ease;
    position: relative;
    z-index: 20;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
}
.resizer-h:hover, .resizer-h.dragging {
    background: rgba(88, 166, 255, 0.25);
    border-color: var(--neon-cyan);
}
.resizer-h::after {
    content: '';
    height: 36px;
    width: 3px;
    background: var(--text-muted);
    border-radius: 2px;
    opacity: 0.7;
}

/* Left Panel: Collapsible Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
    transition: width 0.3s var(--ease-out);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.sidebar.collapsed {
    width: 0;
    border-right: none;
    overflow: hidden;
}

.sidebar-group {
    border-bottom: 1px solid var(--border-subtle);
}
.sidebar-group-title {
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 0.6rem 0.8rem;
    letter-spacing: 0.04em;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
}
.sidebar-group-title::after {
    content: '▼';
    font-size: 0.55rem;
    transition: transform 0.2s ease;
    color: var(--text-muted);
}
.sidebar-group.collapsed .sidebar-group-title::after {
    transform: rotate(-90deg);
}
.sidebar-group.collapsed .sidebar-items {
    display: none;
}
.sidebar-items {
    list-style: none;
    padding-bottom: 0.4rem;
}
.sidebar-item-link {
    display: block;
    padding: 0.35rem 1.2rem;
    font-size: 0.78rem;
    font-family: var(--font-body);
    color: var(--text-secondary);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all 0.15s ease;
}
.sidebar-item-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
    text-decoration: none;
}
.sidebar-item-link.active {
    color: var(--neon-cyan);
    background: rgba(88, 166, 255, 0.08);
    border-left: 2px solid var(--neon-cyan);
    font-weight: 500;
}

/* Center Panel: Challenge Content */
.content-panel {
    flex: 1 1 45%;
    background: var(--bg-primary);
    overflow-y: auto;
    padding: 1.5rem 2rem;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.content-badge {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    padding: 0.2rem 0.6rem;
    font-size: 0.72rem;
    font-family: var(--font-code);
    font-weight: 600;
    color: var(--neon-cyan);
    background: rgba(88, 166, 255, 0.08);
    border: 1px solid rgba(88, 166, 255, 0.15);
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

.content-header {
    margin-bottom: 1.5rem;
}

.content-desc {
    font-size: 0.88rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Checklist cards */
.checklist-container {
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1.5rem;
}
.checklist-title {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
    letter-spacing: 0.05em;
}
.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.82rem;
    margin-bottom: 0.4rem;
    color: var(--text-secondary);
}
.checklist-item::before {
    content: '☐';
    color: var(--neon-cyan);
    font-weight: bold;
    flex-shrink: 0;
}

/* Action forms (rating, status, buttons) */
.action-box {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ratings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.rating-stars {
    display: flex;
    gap: 0.2rem;
}
.star {
    font-size: 1.2rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.15s ease;
}
.star.active {
    color: var(--neon-yellow);
}

.controls-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Reference Solution Drawer */
.reference-drawer {
    margin-top: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.reference-toggle {
    background: var(--bg-secondary);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    cursor: pointer;
    user-select: none;
    border-bottom: 1px solid var(--border-color);
}
.reference-toggle::after {
    content: '▼';
    font-size: 0.6rem;
    transition: transform 0.2s ease;
}
.reference-drawer.open .reference-toggle::after {
    transform: rotate(180deg);
}
.reference-content {
    display: none;
    background: #090d13 !important;
    color: #00ffff !important; /* Bright glowing neon cyan */
    padding: 1.2rem !important;
    max-height: 320px !important; /* Constrain height to keep dashboard layout stable */
    overflow: auto !important; /* Enable scrollbars */
    font-family: var(--font-code) !important;
    font-size: 0.85rem !important;
    line-height: 1.6 !important;
    border-top: 1px solid var(--border-color);
    white-space: pre !important;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.4); /* Cyan glow */
}
.reference-drawer.open .reference-content {
    display: block;
}

/* Clean Dual-Pane Workspace Layout */
.dual-pane-container {
    display: flex;
    flex: 1;
    height: calc(100vh - 86px);
    overflow: hidden;
    background: var(--bg-void);
}

.pane-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    border-right: 1px solid var(--border-color);
    background: var(--bg-code);
}
.pane-column:last-child {
    border-right: none;
}

.pane-header-bar {
    height: 38px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.8rem;
    flex-shrink: 0;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.pane-file-tabs {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    height: 100%;
}

.pane-file-tab {
    font-family: var(--font-code);
    font-size: 0.78rem;
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    border-right: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 6px;
    user-select: none;
    transition: all var(--t-fast);
}
.pane-file-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}
.pane-file-tab.active {
    color: var(--neon-cyan);
    background: var(--bg-code);
    border-bottom: 2px solid var(--neon-cyan);
    font-weight: 600;
}

.pane-editor-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.pane-editor-body .CodeMirror {
    height: 100% !important;
    font-family: var(--font-code);
    font-size: 0.85rem;
}


.line-numbers {
    width: 3rem;
    background: rgba(0, 0, 0, 0.15);
    border-right: 1px solid var(--border-color);
    font-family: var(--font-code);
    font-size: 0.78rem;
    color: var(--text-muted);
    text-align: right;
    padding: 1rem 0.5rem;
    user-select: none;
    line-height: 1.5;
    overflow: hidden;
}

.editor-area {
    position: relative;
    flex: 1;
    height: 100%;
}

/* Overlay alignment */
.code-textarea, .highlight-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    margin: 0 !important;
    padding: 1rem !important;
    font-family: var(--font-code) !important;
    font-size: 0.85rem !important;
    line-height: 1.5 !important;
    letter-spacing: -0.01em !important;
    tab-size: 4 !important;
    -moz-tab-size: 4 !important;
    border: none !important;
    box-sizing: border-box !important;
    overflow-y: auto !important;
    white-space: pre-wrap !important;
    word-wrap: break-word !important;
    border-radius: 0 !important;
}

.code-textarea {
    background: transparent !important;
    color: transparent !important;
    caret-color: var(--neon-cyan) !important;
    z-index: 2;
    resize: none;
    outline: none;
}

.highlight-overlay {
    z-index: 1;
    background: transparent !important;
    pointer-events: none;
}

.highlight-overlay code {
    font-family: var(--font-code) !important;
    font-size: 0.85rem !important;
    line-height: 1.5 !important;
    white-space: pre-wrap !important;
    word-wrap: break-word !important;
    background: transparent !important;
    padding: 0 !important;
}

/* Play button floating bottom right of editor */
.btn-play-run {
    position: absolute;
    bottom: 1.25rem;
    right: 1.25rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #ffffff;
    color: #3fb950;
    border: 1px solid rgba(0, 0, 0, 0.1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 10;
}
.btn-play-run:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 20px rgba(63, 185, 80, 0.4);
    color: #2ea043;
}
.btn-play-run svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* Console Pane */
.console-pane {
    height: 30%;
    min-height: 120px;
    background: var(--bg-code);
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.console-header {
    height: 32px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-heading);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
/* ── Console tab switcher — pill capsule (ported from production_version_redesign) */
.console-tabs {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 3px;
    background: rgba(0, 0, 0, 0.25);
    border-radius: 9px;
    height: auto;
}
.tab-btn {
    height: 28px;
    padding: 0 13px;
    border: 0;
    border-radius: 7px;
    color: rgba(180, 200, 230, 0.65);
    background: transparent;
    font-family: var(--font-heading);
    font-size: 0.69rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    cursor: pointer;
    white-space: nowrap;
    transition: background .14s, color .14s, box-shadow .14s;
}
.tab-btn:hover {
    color: rgba(220, 240, 255, 0.95);
    background: rgba(255, 255, 255, 0.08);
}
.tab-btn.active {
    color: var(--neon-cyan);
    background: rgba(0, 255, 255, 0.12);
    font-weight: 700;
    box-shadow: 0 1px 4px rgba(0,0,0,.35), 0 0 0 .5px rgba(0,255,255,.2);
}

/* ── Light Mode Tab Visibility Fix ── */
html.light .console-tabs {
    background: #e4e9f2;
}
html.light .tab-btn {
    color: #475569;
}
html.light .tab-btn:hover {
    color: #0f172a;
    background: rgba(255, 255, 255, 0.6);
}
html.light .tab-btn.active {
    color: #0284c7;
    background: #ffffff;
    font-weight: 700;
    box-shadow: 0 1px 4px rgba(15, 23, 42, 0.12);
}

/* ── Sleek 3-Column Coverage Grid (ported from production_version_redesign) ── */
.coverage-grid {
    min-height: 180px;
    display: grid;
    grid-template-columns: 0.8fr 1.3fr 1.1fr;
    background: var(--bg-code);
    font-family: var(--font-body);
}
@media (max-width: 768px) {
    .coverage-grid {
        grid-template-columns: 1fr;
    }
}

.coverage-score,
.coverage-list,
.coverage-note {
    padding: 16px 20px;
}

.coverage-score {
    background: rgba(13, 27, 42, 0.6);
    border-right: 1px solid var(--border-color);
}
.coverage-score > span {
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.coverage-score strong {
    display: block;
    margin-top: 8px;
    color: var(--neon-cyan);
    font-size: 44px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -2px;
}
.coverage-score strong small {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0;
}
.coverage-score p {
    margin: 8px 0 0;
    color: var(--neon-green);
    font-size: 11px;
    font-weight: 600;
}

.coverage-list {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
}
.coverage-list .cov-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px 10px;
    color: var(--text-secondary);
    font-size: 11.5px;
    font-weight: 600;
}
.coverage-list .cov-item span {
    color: var(--text-primary);
}
.coverage-list .cov-item b {
    color: var(--neon-cyan);
    font-size: 12px;
}
.coverage-list .cov-item i {
    grid-column: 1 / -1;
    height: 6px;
    overflow: hidden;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
}
.coverage-list .cov-item em {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #38bdf8, var(--neon-cyan));
}

.coverage-note {
    background: rgba(13, 27, 42, 0.4);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
}
.coverage-note strong {
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 700;
}
.coverage-note p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 11.5px;
    line-height: 1.5;
}
.coverage-note .cov-btn {
    display: inline-flex;
    align-self: flex-start;
    align-items: center;
    gap: 4px;
    margin-top: 4px;
    padding: 5px 12px;
    border: 1px solid var(--neon-cyan);
    border-radius: 6px;
    color: var(--neon-cyan);
    background: transparent;
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.14s ease;
}
.coverage-note .cov-btn:hover {
    background: rgba(0, 255, 255, 0.12);
}

/* Light mode overrides for coverage-grid */
html.light .coverage-score {
    background: #f9fbff;
    border-right-color: #eaeef6;
}
html.light .coverage-note {
    background: #f5f8ff;
    border-left-color: #eaeef6;
}
html.light .coverage-list .cov-item i {
    background: #dde3f0;
}

/* ── Console body — readable monospace output */
.console-body {
    flex: 1;
    padding: 18px 22px 22px;
    font-family: 'JetBrains Mono', 'IBM Plex Mono', var(--font-code);
    font-size: 13px;
    line-height: 2.05;
    color: #a8c0da;
    background: #0b1726;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-word;
    letter-spacing: 0;
}

/* ── Console log token colours (use span.log-* classes in output HTML) */
.log-time  { color: #3a5878; }          /* [00:00.00] timestamps — clearly muted    */
.log-pass  { color: #43d4a1; font-weight: 600; } /* [PASS] — bright teal green        */
.log-fail  { color: #f07585; font-weight: 600; } /* [FAIL]/[ERROR] — warm red         */
.log-warn  { color: #f5c842; font-weight: 600; } /* [WARN] — amber                    */
.log-code  { color: #82b4ff; }          /* module names / file paths              */
.log-check { color: #64e0b8; }          /* ✓ checkmark lines                      */

/* Legacy success/error/warning whole-pane colours — kept for compatibility */
.console-body.success {
    color: #43d4a1;
    font-weight: 600;
}
.console-body.error {
    color: #f07585;
    font-weight: 600;
}
.console-body.warning {
    color: #f5c842;
    font-weight: 600;
}

/* ── UI Components & Utilities ──────────────────────────────── */

/* Inputs & Filter elements */
.filter-search {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 0.4rem 0.8rem;
    font-family: var(--font-body);
    font-size: 0.8rem;
    outline: none;
    transition: all 0.2s ease;
}
.filter-search:focus {
    border-color: var(--neon-cyan);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem 1rem;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    text-decoration: none;
}
.btn-primary {
    background: var(--neon-cyan);
    color: var(--bg-void);
}
.btn-primary:hover {
    background: var(--neon-magenta);
    box-shadow: var(--shadow-glow);
}
.btn-secondary {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}
.btn-secondary:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
}
.btn-sm {
    padding: 0.25rem 0.6rem;
    font-size: 0.72rem;
}
.btn-group {
    display: flex;
    gap: 0.5rem;
}

/* Badge/Tag colors */
.tag-cyan { color: var(--neon-cyan); border-color: rgba(88, 166, 255, 0.2); background: rgba(88, 166, 255, 0.05); }
.tag-magenta { color: var(--neon-magenta); border-color: rgba(188, 140, 255, 0.2); background: rgba(188, 140, 255, 0.05); }
.tag-orange { color: var(--neon-orange); border-color: rgba(240, 136, 62, 0.2); background: rgba(240, 136, 62, 0.05); }
.tag-green { color: var(--neon-green); border-color: rgba(63, 185, 80, 0.2); background: rgba(63, 185, 80, 0.05); }
.tag-purple { color: var(--neon-purple); border-color: rgba(137, 87, 229, 0.2); background: rgba(137, 87, 229, 0.05); }
.tag-yellow { color: var(--neon-yellow); border-color: rgba(210, 153, 34, 0.2); background: rgba(210, 153, 34, 0.05); }
.tag-blue { color: var(--neon-blue); border-color: rgba(88, 166, 255, 0.2); background: rgba(88, 166, 255, 0.05); }

/* Difficulty Badges */
.diff-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-size: 0.68rem;
    font-family: var(--font-code);
    text-transform: uppercase;
    font-weight: 700;
}
.diff-warmup { background: rgba(63, 185, 80, 0.15); color: #58d68d; border: 1px solid rgba(63, 185, 80, 0.3); }
.diff-medium { background: rgba(210, 153, 34, 0.15); color: #f4d03f; border: 1px solid rgba(210, 153, 34, 0.3); }
.diff-hard { background: rgba(240, 136, 62, 0.15); color: #eb984e; border: 1px solid rgba(240, 136, 62, 0.3); }
.diff-crusher { background: rgba(255, 123, 114, 0.15); color: #ec7063; border: 1px solid rgba(255, 123, 114, 0.3); }

/* ── Full-Width Layout ───── */
.full-width-panel {
    flex: 1;
    background: var(--bg-primary);
    overflow-y: auto;
    padding: 2rem;
}

/* Dashboard Styles */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.hero-section {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.04) 0%, rgba(137, 87, 229, 0.04) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(16px);
    box-shadow: inset 0 0 20px rgba(0, 255, 255, 0.1), 0 8px 32px rgba(0,0,0,0.5);
}
.hero-subtitle {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* Grid Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: all 0.2s ease;
    text-decoration: none;
    color: inherit;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}
.card:hover {
    border-color: var(--neon-cyan);
    transform: translateY(-2px);
    text-decoration: none;
    box-shadow: var(--shadow-card);
}
.card-icon {
    font-size: 1.5rem;
}
.card-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
}
.card-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
}
.card-meta {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    border-top: 1px solid var(--border-subtle);
    padding-top: 0.75rem;
}

/* Day timeline */
.timeline-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1rem;
    display: flex;
    gap: 1rem;
}
.timeline-marker {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    flex-shrink: 0;
}

/* Table styles */
.dataset-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
}
.dataset-table th, .dataset-table td {
    padding: 0.8rem 1rem;
    text-align: left;
    font-size: 0.82rem;
    border-bottom: 1px solid var(--border-color);
}
.dataset-table th {
    background: var(--bg-secondary);
    color: var(--neon-cyan);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
}
.dataset-table tr:hover td {
    background: rgba(255, 255, 255, 0.01);
}

/* Toast System */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 1000;
}
.toast {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--neon-cyan);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1.25rem;
    color: var(--text-primary);
    font-size: 0.8rem;
    font-family: var(--font-body);
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: toast-enter 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.toast.success { border-left-color: var(--neon-green); }
.toast.error { border-left-color: var(--neon-red); }
.toast-icon { font-weight: bold; }

@keyframes toast-enter {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.toast-exit {
    animation: toast-exit 0.2s ease forwards;
}
@keyframes toast-exit {
    to { transform: translateY(10px); opacity: 0; }
}

/* ── Prism Okaidia Syntax Highlighting Core ─────────────────── */
.token.comment, .token.prolog, .token.doctype, .token.cdata {
    font-family: 'Caveat', 'Georgia', cursive, serif;
    font-size: 1.15rem;
    color: #8292a2;
    font-style: normal;
    letter-spacing: 0.03em;
}
.token.punctuation { color: #f8f8f2; }
.token.property, .token.tag, .token.constant, .token.symbol, .token.deleted { color: #f92672; }
.token.boolean, .token.number { color: #ae81ff; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted { color: #a6e22e; }
.token.operator, .token.entity, .token.url { color: #f8f8f2; }
.token.atrule, .token.attr-value, .token.function, .token.class-name { color: #e6db74; }
.token.keyword { color: #66d9ef; font-weight: bold; }
.token.regex, .token.important, .token.variable { color: #fd971f; }
.token.important, .token.bold { font-weight: bold; }
.token.italic { font-style: italic; }

/* ── CodeMirror Integration Styles ─────────────────────────── */
.CodeMirror {
    font-family: var(--font-code) !important;
    font-size: 0.85rem !important;
    line-height: 1.5 !important;
    height: 100% !important;
    width: 100% !important;
    background: var(--bg-code) !important;
    color: #f8f8f2 !important;
}

.CodeMirror-gutters {
    background: rgba(0, 0, 0, 0.2) !important;
    border-right: 1px solid var(--border-color) !important;
    width: 3.2rem !important;
}

.CodeMirror-linenumber {
    color: var(--text-muted) !important;
    font-family: var(--font-code) !important;
    font-size: 0.78rem !important;
    padding-right: 8px !important;
}

.CodeMirror-cursor {
    border-left: 2px solid var(--neon-cyan) !important;
}

/* Adjust CodeMirror matching scrollbars to our global layout */
.CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
    background: transparent !important;
}

/* CodeMirror theme overrides to match Okaidia colors */
.cm-s-monokai span.cm-keyword { color: #66d9ef !important; font-weight: bold !important; }
.cm-s-monokai span.cm-atom { color: #ae81ff !important; }
.cm-s-monokai span.cm-number { color: #ae81ff !important; }
.cm-s-monokai span.cm-def { color: #a6e22e !important; }
.cm-s-monokai span.cm-variable { color: #f8f8f2 !important; }
.cm-s-monokai span.cm-type { color: #66d9ef !important; font-style: italic !important; }
.cm-s-monokai span.cm-comment {
    font-family: 'Caveat', 'Georgia', cursive, serif !important;
    font-size: 1.15rem !important;
    color: #8292a2 !important;
    font-style: normal !important;
    letter-spacing: 0.03em !important;
}
.cm-s-monokai span.cm-string { color: #a6e22e !important; }
.cm-s-monokai span.cm-meta { color: #f92672 !important; }
.cm-s-monokai span.cm-qualifier { color: #e6db74 !important; }
.cm-s-monokai span.cm-builtin { color: #e6db74 !important; }
.cm-s-monokai span.cm-property { color: #f92672 !important; }
.cm-s-monokai span.cm-operator { color: #f8f8f2 !important; }


@keyframes neon-pulse {
    0% { box-shadow: 0 0 5px var(--neon-cyan), 0 0 10px var(--neon-cyan); }
    50% { box-shadow: 0 0 10px var(--neon-cyan), 0 0 20px var(--neon-cyan); }
    100% { box-shadow: 0 0 5px var(--neon-cyan), 0 0 10px var(--neon-cyan); }
}
.btn-primary:hover {
    animation: neon-pulse 1.5s infinite;
}

/* ── Auth System CSS Styles ─────────────────────────────────── */
.auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity var(--t-normal) var(--ease-out);
}
.auth-overlay.open {
    display: flex;
    opacity: 1;
}
.auth-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transform: scale(0.9);
    transition: transform var(--t-normal) var(--ease-out);
}
.auth-overlay.open .auth-card {
    transform: scale(1);
}
.auth-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.2rem;
}
.auth-close:hover {
    color: var(--neon-red);
}
.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 0.5rem;
}
.auth-tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    cursor: pointer;
    text-transform: uppercase;
}
.auth-tab-btn.active {
    color: var(--neon-cyan);
    border-bottom: 2px solid var(--neon-cyan);
}
.auth-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.auth-input-group label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}
.auth-input {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    font-family: var(--font-body);
    font-size: 0.82rem;
}
.auth-input:focus {
    border-color: var(--neon-cyan);
    outline: none;
}
.auth-social-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
    border-top: 1px solid var(--border-subtle);
    padding-top: 0.75rem;
}
.btn-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 0.5rem;
    font-size: 0.82rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
}
.btn-social:hover {
    border-color: var(--neon-cyan);
    background: var(--bg-card-hover);
}
.auth-user-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid var(--border-subtle);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
}
.auth-user-email {
    color: var(--neon-cyan);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.btn-signout {
    background: transparent;
    border: none;
    color: var(--neon-red);
    cursor: pointer;
    font-size: 0.72rem;
    font-family: var(--font-heading);
}
.btn-signout:hover {
    text-decoration: underline;
}