/* Import a premium pixelated programming font for headers */
@import url('https://fonts.googleapis.com/css2?family=VT323&family=Space+Mono:wght@400;700&display=swap');



/* ==========================================================================
   PHASE 1 RE-TUNING: EYE-STRAIN MITIGATION MATRIX (THEME ACCENT ROOTS)
   ========================================================================== */

:root {
    /* --- VERCEL LIGHT MODE THEME (SOFT TEXTURE BALANCED) --- */
    --bg-color: #fcfcfc;       /* Ultra-soft pristine light gray background */
    --card-bg: #ffffff;        /* Clean card face lifters */
    --text-color: #18181b;     /* Deep zinc-900 instead of piercing pure black text */
    --text-muted: #71717a;     /* Balanced zinc-500 readability lines */
    --border-color: #e4e4e7;   /* Zinc-200 border rules */
    
    /* Premium Monochromatic Branding Accents */
    --primary-color: #18181b;  
    --primary-hover: #27272a;
    --accent-glow: #0070f3;    
    
    /* Operational State Indicators */
    --success-color: #0070f3;
    --error-color: #ee0000;
    --premium-color: #f5a623;
    
    /* Geometry Layout Constraints */
    --radius-sharp: 6px;       
    --transition-smooth: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.dark-mode {
    /* --- VERCEL EYE-COMFORT DARK MODE (SOFT GLOW RESISTANT) --- */
    --bg-color: #09090b;       /* Rich, soothing zinc-950 deep space canvas */
    --card-bg: #141416;        /* Slate-tinted charcoal beds for reading panel layering */
    --text-color: #e4e4e7;     /* High-comfort zinc-200 text that eliminates screen blooming */
    --text-muted: #8a8a93;     /* Visible, distinct muted metadata lines */
    --border-color: rgba(255, 255, 255, 0.06); /* Invisible-border transition matrix */
    
    /* Accent Inversion States */
    --primary-color: #e4e4e7;
    --primary-hover: #ffffff;
    --accent-glow: #38bdf8;    /* Softer neon-blue element highlights */
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    
    /* Advanced Anti-Glare Subpixel Text Engine */
    -webkit-font-smoothing: antialiased; 
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}
/* --- STRUCTURE CONSTRAINTS & GRID CHANNELS --- */
.container {
    max-width: 1200px; /* Expanded from 800px to allow professional widescreen split dashboards */
    margin: 0 auto;
    padding: 40px 24px; /* Increased padding to give elements massive, elegant breathing space */
    box-sizing: border-box;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000; /* Keeps navbar fluidly floating overhead as you scroll down pages */
    transition: var(--transition-smooth);
}

.nav-actions {
    display: flex;
    gap: 24px; /* Slightly wider spacing for an uncrowded interface layout */
    align-items: center;
}

/* Utility visibility flag overrides */
.hidden { display: none !important; }




/* Buttons */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-circle {
    background: var(--border-color);
    border: none;
    font-size: 1.2rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
}

.btn-back {
    background: transparent;
    color: var(--primary-color);
    padding-left: 0;
    margin-bottom: 15px;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-premium-toggle {
    background-color: #475569;
    color: white;
    font-size: 0.85rem;
}

/* Page Components */
.welcome-hero {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #2563eb10, #3b82f620);
    border-radius: 16px;
    margin-bottom: 30px;
}

.subject-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.subject-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-color);
    font-size: 1.3rem;
    font-weight: bold;
    cursor: pointer;
    text-align: left;
    transition: transform 0.2s, box-shadow 0.2s;
}

.subject-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
}

.chapters-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chapter-card {
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    text-align: left;
    font-size: 1.05rem;
    cursor: pointer;
    font-weight: 500;
}

.chapter-card:hover { border-color: var(--primary-color); }

/* ==========================================================================
   VERCEL-STYLE QUESTION ENGINE & OPTION LABELS (REFINED LAYOUT CANVAS)
   ========================================================================== */

/* The Core Card Container Matrix */
.question-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp); /* Tight geometric mechanical corner profile */
    padding: 24px;
    margin-bottom: 24px;
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    transition: var(--transition-smooth);
}

/* Metadata Subheadings (e.g., Year / Topic Track) */
.question-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em; /* Monospace-adjacent spacious design */
    margin-bottom: 12px;
}

/* Main Text Blueprint */
.question-text {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-color);
    margin-bottom: 24px;
}

/* Exam Equations & Figures Image Frame */
.question-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sharp);
    border: 1px solid var(--border-color); /* Safely frames equation snips */
    margin-bottom: 20px;
    display: block;
}

/* Stack Layout for Options selection */
.options-list {
    display: flex;
    flex-direction: column;
    gap: 8px; /* Slightly tighter spacing setup */
}

/* Interactive Option Boundaries (Using our global opacity rules) */
.option-label {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp);
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

/* Replaced separate theme blocks with a clean dynamic border highlight */
.option-label:hover { 
    border-color: var(--text-color);
}

/* --- STATE ASSESSMENTS: CLEAN HIGHLIGHT OVERLAYS --- */
/* Dropped muddy saturated backgrounds for precise, bright micro-tokens */
.correct-ans {
    border-color: var(--success-color) !important;
    background-color: rgba(0, 112, 243, 0.04) !important; /* Elegant Vercel Blue micro-tint */
    color: var(--success-color) !important;
    font-weight: 500;
}

.wrong-ans {
    border-color: var(--error-color) !important;
    background-color: rgba(238, 0, 0, 0.04) !important; /* Elegant Vercel Red micro-tint */
    color: var(--error-color) !important;
}

/* --- PREMIUM SECURITY MASK COATINGS --- */
.locked-card { 
    overflow: hidden; 
}

.blur-content {
    filter: blur(6px); /* Clean computational mask depth */
    opacity: 0.25;
    pointer-events: none;
    user-select: none;
}

/* Flat, translucent glass barrier */
.lock-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(var(--bg-color), 0.2);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

/* Geometric Unlock Badge Trigger */
.lock-text {
    background: var(--text-color);
    color: var(--bg-color);
    border: 1px solid var(--text-color);
    padding: 10px 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-sharp);
    cursor: pointer;
    transition: var(--transition-smooth);
}

/* Implements your premium plastic wrap hover on the lock block trigger */
.lock-text:hover {
    opacity: 0.85;
}

/* Premium / Pay Box Layout */
.pay-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    margin-top: 20px;
}

.lock-large { font-size: 4rem; display: block; margin-bottom: 15px; }

.price-tag {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--premium-color);
    margin: 25px 0;
}

.price-tag .duration { font-size: 1rem; color: var(--text-muted); font-weight: normal; }

.btn-pay-now {
    background: var(--primary-color);
    color: white;
    font-size: 1.1rem;
    padding: 15px 40px;
    width: 100%;
}
.quirky-footer-intro {
    text-align: center;
    margin: 40px auto 20px auto; /* Generous spacing above, neat spacing below */
    max-width: 600px;            /* Keeps the text block readable and tight */
    padding: 20px;
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-muted, #666); /* Matches your theme's lighter text color */
    font-style: italic;          /* Gives it a nice personal, commentary feel */
    border-top: 1px dashed rgba(255, 255, 255, 0.1); /* Subtle divider line */
}

/* Optional: Emphasize your snacks slightly if you want them to pop */
.quirky-footer-intro strong {
    color: #e2c873; /* A warm orange/yellow accent color */
    font-weight: 600;
}

#mode-toggle {
    background: var(--btn-bg, #eee);
    color: var(--btn-text, #333);
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 8px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
    margin-left: 10px; /* Pushes it slightly away from the dark mode button */
}

/* Dark mode adjustments if your theme uses a .dark-mode class on body */
body.dark-mode #mode-toggle {
    background: #2d2d2d;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.1);
}

#mode-toggle:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}


/* ==========================================================================
   VERCEL-STYLE FREE TEASER PORTAL ROWS (MONOCHROME REFINED FEED)
   ========================================================================== */

#teaser-list-wrapper {
    max-width: 800px;
    margin: 32px auto;
    padding: 0 24px;
}

.teaser-row {
    background: var(--card-bg);
    color: var(--text-color);
    padding: 20px 24px;
    margin-bottom: 16px;
    border-radius: var(--radius-sharp);
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition-smooth);
    display: flex;
    align-items: flex-start;
    box-sizing: border-box;
    
    /* 3-LINE BOUNDARY CONSTRAINT LAYER */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;  
    overflow: hidden;
    white-space: normal;
}

/* Premium Geometric Focus (No movement/shifting) */
.teaser-row:hover {
    border-color: var(--text-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

/* Tight Index Tracking Numbers */
.teaser-num {
    font-weight: 600;
    color: var(--text-muted); /* Dropped the orange for an un-cluttered gray */
    margin-right: 16px;
    flex-shrink: 0;
    font-family: monospace; /* Gives a structured engineering look to the indices */
}

/* --- PREMIUM LOCKED PREMIUM LAYER RE-ENGINEERING --- */
.locked-teaser {
    /* Uses a subtle translucent background instead of a harsh red block line */
    background: rgba(0, 0, 0, 0.01) !important;
    border-color: var(--border-color) !important;
}

.dark-mode .locked-teaser {
    background: rgba(255, 255, 255, 0.01) !important;
}

/* Soft Premium Blur Layer Matrix */
.blur-teaser-text {
    filter: blur(5px); /* Slightly deeper crisp blur context */
    opacity: 0.4;      /* More elegant fading mask layout */
    user-select: none;
    pointer-events: none;
}

/* ==========================================================================
   VERCEL-STYLE EXAM READER SCREEN LAYOUT (REFINED MONOCHROME)
   ========================================================================== */

/* 1. Viewport Edge Splitting */
#exam-reader-page {
    width: 100vw !important;
    position: relative;
    left: 50%;
    right: 50%;
    margin-left: -50vw !important;
    margin-right: -50vw !important;
    padding: 0 40px !important; /* Balanced architectural padding */
    box-sizing: border-box;
}

/* 2. Structured Layout Framework */
.exam-split-container {
    display: flex;
    flex-direction: row; 
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    justify-content: center;
    gap: 40px;
    box-sizing: border-box;
}

/* 3. The Central Question Region */
.exam-left-column {
    flex: 0 1 700px;
    width: 100%;
    max-width: 700px;
}

.exam-left-column .question-card {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box;
    margin-bottom: 24px;
}

/* 4. The Sticky Geometric Dashboard Sidebar */
.exam-right-sidebar {
    width: 260px; /* Slightly wider layout channel footprint */
    min-width: 260px;
    max-width: 260px;
    flex-shrink: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sharp);
    padding: 24px;
    height: fit-content;
    position: sticky;
    top: 140px; /* Aligns perfectly beneath our floating dynamic header bars */
    box-sizing: border-box;
    transition: var(--transition-smooth);
}

.exam-right-sidebar h3 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

/* Question Number Boxes Grid Setup */
.jee-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr); /* Clean, predictable 5-column engineering alignment matrix */
    gap: 8px;
    margin-bottom: 24px;
}

/* Individual Grid Squares Style: Crisp Monochrome Geometry */
.grid-box {
    aspect-ratio: 1 / 1; /* Keeps grid blocks perfectly square dynamically */
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 0.85rem;
    border-radius: var(--radius-sharp);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-muted);
}

/* Premium Active Focus State: Inverts dynamically matching Vercel's buttons */
.grid-box.active-slice {
    background: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
}

/* Premium Minimalist Shading Hover Effect */
.grid-box:hover {
    border-color: var(--text-color);
    color: var(--text-color);
    opacity: 0.8;
}

/* Sidebar Dashboard Legend Utility Classes */
.jee-legend {
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    color: var(--text-muted);
}

.legend-box {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 2px;
}

.legend-box.active { 
    background: var(--text-color); 
}

.legend-box.available { 
    background: transparent; 
    border: 1px solid var(--border-color); 
}

/* --- RESPONSIVE MOBILE CONSTRAINT LAYERS --- */
@media (max-width: 992px) {
    #exam-reader-page {
        width: 100% !important;
        position: static;
        margin: 0 !important;
        padding: 0 16px !important;
    }
    .exam-split-container {
        flex-direction: column;
        gap: 32px;
    }
    .exam-right-sidebar {
        position: static;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 100% !important;
    }
}

/* Collapse Layout States */
.exam-right-sidebar.collapsed {
    display: none !important;
}

.exam-right-sidebar.collapsed ~ .exam-left-column {
    max-width: 700px; 
    margin: 0 auto;
}





/* ==========================================================================
   VERCEL-STYLE COMPACT OPERATIONAL BUTTON (LOW-CONTRAST / PREMIUM FRAME)
   ========================================================================== */

.btn, .btn-submit, #check-ans-btn {
    /* Subtle low-contrast presentation rules */
    background: transparent !important; 
    color: var(--text-color) !important;       
    border: 1px solid var(--border-color) !important;
    
    /* Layout structural sizing changes */
    width: auto !important;             /* Stops the button from stretching wide */
    display: inline-flex !important;    /* Allows it to respect padding sizing */
    align-self: flex-end;               /* Snaps it cleanly toward the right context boundary */
    padding: 8px 16px !important;       /* Tighter, more compact spacing profile */
    font-size: 0.85rem !important;
    font-weight: 500;
    border-radius: var(--radius-sharp);
    cursor: pointer;
    transition: var(--transition-smooth) !important;
    
    /* Spacing alignment layout tools */
    margin-top: 16px;
    margin-left: auto;                  /* Pushes the element to the far right inside a column container */
}

/* Premium micro-shading overlay interaction */
.btn:hover, .btn-submit:hover, #check-ans-btn:hover {
    border-color: var(--text-color) !important; /* The border subtly brightens up */
    background: rgba(var(--text-color), 0.04) !important; /* Whispering smooth plastic overlay tint */
    opacity: 1 !important;
}




/* ==========================================================================
   THE ABSOLUTE FINAL CORRECTION OVERRIDE: MONOCHROME ACCENT FORCES
   ========================================================================== */

/* Overwrites any hidden bright blue or green highlights with our soft Vercel blue micro-tint */
.correct-ans, 
.option-label.correct-ans,
body .correct-ans,
body.dark-mode .correct-ans {
    border-color: var(--success-color) !important;
    background-color: rgba(0, 112, 243, 0.06) !important; /* Premium whisper-thin tint */
    color: var(--success-color) !important;
    font-weight: 600 !important;
}

/* Overwrites any hidden bright red highlights with our soft Vercel red micro-tint */
.wrong-ans, 
.option-label.wrong-ans,
body .wrong-ans,
body.dark-mode .wrong-ans {
    border-color: var(--error-color) !important;
    background-color: rgba(238, 0, 0, 0.06) !important; /* Premium whisper-thin tint */
    color: var(--error-color) !important;
}


/* ==========================================================================
   ADVANCED LIGHT RE-ENGINEERING: MONOCHROME DIMMING & GLYPH FEED
   ========================================================================== */

/* 1. Nothing-Glyph Typographic Treatment */
.nothing-glyph {
    font-family: 'VT323', 'Space Mono', monospace !important;
    text-transform: uppercase;
    font-size: 2rem !important;
    letter-spacing: 0.05em !important;
    color: var(--text-color);
}

/* 2. The Artistic Parent Container Hover Mechanic */
/* When the USER hovers anywhere inside the grid, ALL items drop their opacity */
.subject-grid:hover .subject-card {
    opacity: 0.35;
    filter: grayscale(1);
}

/* 3. The Singular Anchor Focus Exception */
/* The specific item currently under the user's cursor snaps back to full strength */
.subject-grid .subject-card:hover {
    opacity: 1 !important;
    filter: grayscale(0) !important;
    border-color: var(--text-color) !important;
    background: rgba(var(--text-color), 0.01) !important;
}

/* 4. Refined Chapter Rows (Without Hero Triangle) */
.chapters-grid div {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
    font-size: 0.95rem;
    color: var(--text-color);
}

.chapters-grid div:hover {
    background: rgba(0, 112, 243, 0.01);
    padding-left: 32px;
}

.chapters-grid div::after {
    content: "LAUNCH //";
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent-glow);
    opacity: 0;
    transform: translateX(-8px);
    transition: var(--transition-smooth);
}

.chapters-grid div:hover::after {
    opacity: 1;
    transform: translateX(0);
}





/* ==========================================================================
   FINAL PRODUCTION MOBILE FIXED LAYER: TRUE EDGE-TO-EDGE HYPER-COMPACT ENGINE
   ========================================================================== */
@media screen and (max-width: 600px) {
    /* 0. ULTRA-SLIM MOBILE NAVBAR CONFIGURATION */
    .navbar {
        padding: 6px 12px !important; /* Extra compression on mobile header strip */
        height: 48px !important;       /* Dropped to 48px for micro utility baseline */
        box-sizing: border-box;
    }

    /* Logo/Title adjustment */
    .navbar div[onclick*="navigateTo"],
    .navbar h1, 
    .navbar h2,
    .navbar .brand {
        font-size: 0.9rem !important; 
        font-weight: 700;
        letter-spacing: -0.01em;
    }

    /* Button and interface control alignment track */
    .nav-actions {
        gap: 6px !important; 
    }

    /* Shrinks navbar operational elements down to a mobile utility profile */
    .navbar .btn,
    .navbar button,
    .navbar #mode-toggle {
        padding: 4px 8px !important;  
        font-size: 0.72rem !important; 
        margin: 0 !important;
        height: auto !important;
    }

    /* 1. ELIMINATE DOUBLE-STACKED VERTICAL PADDING COATS */
    body, 
    .container, 
    main {
        padding: 0 !important; /* Completely zero out default padding bloat */
        margin: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        overflow-x: hidden;
    }

    /* 2. Intercept both Scroll and Exam section panels to force 100% screen utility */
    #quiz-page,
    #exam-reader-page,
    .page-section {
        max-width: 100% !important;
        width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
        box-sizing: border-box !important;
    }

    /* 3. EXAM MODE ACTION HEADER CLEARANCE: Anchored tightly to the 48px navbar height */
    .exam-split-container {
        display: flex !important;
        flex-direction: column !important;
        width: 100% !important;
        max-width: 100% !important;
        padding: 48px 0 0 0 !important; /* Exactly clears the new 48px header without an extra pixel wasted */
        margin: 0 !important;
        gap: 8px !important; /* Tighter column element gap spacing */
        box-sizing: border-box !important;
    }

    /* 4. Force column blocks to collapse flat with zero margin leakages */
    .exam-left-column,
    #questions-wrapper,
    #exam-cards-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
        box-sizing: border-box !important;
    }

    /* 5. SCROLL MODE HEADER FIX */
    #questions-wrapper .question-card:first-child,
    #exam-cards-wrapper .question-card:first-child {
        margin-top: 12px !important; /* Halved from 24px to instantly cram content upward */
    }

    /* 6. TRUE SHRINK-WRAP TABLET MATRIX (No Dead Bottom/Top Space) */
    .exam-card-layout {
        display: flex !important;
        flex-direction: column !important;
        border-left: none !important;
        border-right: none !important;
        border-radius: 0 !important;
        width: 100% !important;
        height: auto !important;        /* Forcibly breaks any desktop height inherited limits */
        min-height: 0 !important;       /* Permits full structural shrink wrapping */
    }

    .question-workspace-pane {
        width: 100% !important;
        height: auto !important;        /* Shrink wraps around options content tightly */
        min-height: 0 !important;
        padding: 14px 16px !important;  /* Compressed interior padding for tighter geometry */
        box-sizing: border-box;
    }

    .question-card {
        width: 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        margin-bottom: 8px !important;   /* Tight space between item listings */
        border-left: none !important;
        border-right: none !important;
        border-radius: 0 !important;
        padding: 14px 16px !important;  /* Reduced vertical footprint padding */
        box-sizing: border-box !important;
        height: auto !important;
        min-height: 0 !important;
    }

    /* 7. Control Row Compression ("Back to Chapter", "Show Status" buttons wrapper) */
    #quiz-back-btn,
    #selected-chapter-title,
    .btn-back {
        margin-top: 8px !important;     /* Tightly fits beneath navbar bounds */
        margin-bottom: 8px !important;  /* Slashes the gap below headers */
        margin-left: 16px !important;
        margin-right: 16px !important;
    }

    /* 8. Re-align typesetting margins for formulas and layout question strings */
    .question-meta {
        margin-bottom: 6px !important;  /* Tighter metadata grouping line */
    }

    .question-text {
        width: 100% !important;
        max-width: 100% !important;
        font-size: 0.92rem !important; 
        line-height: 1.45 !important;
        margin: 8px 0 !important;       /* Brings question layout tightly next to options stack */
        padding: 0 !important;
    }

    /* 9. STACK & CRAM SELECTION INTERACTIVE OPTIONS CORES */
    .options-list {
        display: flex !important;
        flex-direction: column !important;
        gap: 6px !important;            /* Brings choices close together for single-glance assimilation */
        width: 100% !important;
    }

    .option-label {
        display: flex !important;
        width: 100% !important;
        padding: 10px 12px !important;  /* Slashes inner padding while holding the ideal finger tap-target rule */
        font-size: 0.9rem !important;
        box-sizing: border-box !important;
    }

    /* Compact Operational Buttons ("Check Answer" / "Ask Gemini") Alignment Matrix */
    .btn, .btn-submit, #check-ans-btn {
        margin-top: 10px !important;    /* Tight gap below options list block */
        padding: 6px 12px !important;   /* Sleek, app-like operational tabs */
        font-size: 0.8rem !important;
    }

    /* 10. Sidebar Navigation Panel when stacked below full-bleed cards */
    .exam-right-sidebar {
        position: relative !important;
        top: 0 !important;
        width: calc(100% - 24px) !important;
        margin: 12px auto !important;   /* Clean, tight separation buffer block */
        padding: 16px !important;       /* Tighter layout structure internals */
        border-radius: var(--radius-sharp) !important;
    }

    /* 11. TIGHTEN EXAM MODE BOTTOM NAVIGATION PAGINATION ROW */
    .exam-pagination-row {
        margin-top: 8px !important;    
        padding-top: 8px !important;   
        padding-left: 16px !important; 
        padding-right: 16px !important;
        box-sizing: border-box !important;
    }

    #exam-prev-btn, 
    #exam-next-btn {
        padding: 6px 12px !important;  
        font-size: 0.78rem !important;  
    }

    /* 12. AI SPLIT TERMINAL PANELS HEIGHT SHINK matrix */
    .ai-explanation-pane {
        display: none;
        width: 100% !important;
        padding: 14px 16px !important;
        background: var(--card-bg) !important;
        border-top: 1px solid var(--border-color) !important;
        box-sizing: border-box;
        height: 380px !important;       /* Tightened viewport workspace height for split terminal */
    }
    .exam-card-layout.ai-pane-active .ai-explanation-pane {
        display: flex !important;
        flex-direction: column;
    }
}


/* ==========================================================================
   RIGID DESKTOP MUTUAL EXCLUSIVITY ARCHITECTURE (DESKTOP MODES)
   ========================================================================== */
@media screen and (min-width: 601px) {
    .exam-left-column, .exam-right-sidebar {
        min-width: 0 !important;
        transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    }

    .exam-card-layout {
        display: flex !important;
        flex-direction: row !important;
        width: 100% !important;
        gap: 0 !important;
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sharp);
        overflow: hidden;
        box-sizing: border-box;
        min-width: 0 !important;
        height: auto;
    }

    .question-workspace-pane {
        flex: 0 0 100% !important;
        width: 100% !important;
        padding: 24px !important;
        box-sizing: border-box;
        min-width: 0 !important;
    }

    .ai-explanation-pane {
        flex: 0 0 0% !important;
        width: 0 !important;
        opacity: 0;
        background: rgba(255, 255, 255, 0.01);
        padding: 0;
        border-left: 0 solid var(--border-color);
        box-sizing: border-box;
        overflow: hidden;
        min-width: 0 !important;
        display: flex;
        flex-direction: column;
    }

    /* ==========================================================================
       CHOREOGRAPHED STATE RULES: ENGAGED WHEN ".ai-active-mode" RUNS
       ========================================================================== */
    .exam-split-container.ai-active-mode .exam-right-sidebar {
        display: none !important;
        width: 0 !important;
        flex: 0 0 0% !important;
    }

    .exam-split-container.ai-active-mode .exam-left-column {
        flex: 0 0 100% !important;
        max-width: 100% !important;
        width: 100% !important;
    }

    .exam-card-layout.ai-pane-active {
        gap: 24px !important;
    }

    .exam-card-layout.ai-pane-active .question-workspace-pane {
        flex: 0 0 calc(50% - 12px) !important;
        width: 50% !important;
    }

    .exam-card-layout.ai-pane-active .ai-explanation-pane {
        flex: 0 0 calc(50% - 12px) !important;
        width: 50% !important;
        opacity: 1;
        padding: 24px !important;
        border-left: 1px solid var(--border-color) !important;
        height: 600px; /* Set an explicit height to keep the terminal uniform */
    }
}

/* ==========================================================================
   MOBILE VIEW RIGID OVERRIDES (STACKS EVERYTHING SAFELY DOWNWARD)
   ========================================================================== */
@media screen and (max-width: 600px) {
    .exam-card-layout {
        display: flex !important;
        flex-direction: column !important;
        border-left: none !important;
        border-right: none !important;
        border-radius: 0 !important;
        width: 100% !important;
    }
    .question-workspace-pane {
        width: 100% !important;
        padding: 20px 16px !important;
        box-sizing: border-box;
    }
    .ai-explanation-pane {
        display: none;
        width: 100% !important;
        padding: 16px !important;
        background: var(--card-bg) !important;
        border-top: 1px solid var(--border-color) !important;
        box-sizing: border-box;
        height: 450px;
    }
    .exam-card-layout.ai-pane-active .ai-explanation-pane {
        display: flex !important;
        flex-direction: column;
    }
}

/* ==========================================================================
   HIGH-SPECIFICITY EYE COMFORT & CONTRAST ENGINE FOR GEMINI BOX
   ========================================================================== */

/* Base structural panel configuration */
.ai-explanation-pane {
    background-color: var(--card-bg) !important;
}

/* --- LIGHT MODE TEXT DEFINITION (Prevents being dimmed or washed out) --- */
.ai-explanation-pane,
.ai-explanation-pane p,
.ai-explanation-pane li,
.ai-explanation-pane span,
.ai-bubble-response,
.ai-bubble-response p,
.ai-bubble-response li {
    color: #1c1c1f !important; /* Crisp, distinct dark zinc instead of faded gray */
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Crisp headers for Light Mode */
.ai-explanation-pane strong,
.ai-explanation-pane h1,
.ai-explanation-pane h2,
.ai-explanation-pane h3 {
    color: #09090b !important; /* Solid structural black */
    font-weight: 600;
}

/* --- DARK MODE TEXT DEFINITION (Eliminates blinding white blooming) --- */
body.dark-mode .ai-explanation-pane,
body.dark-mode .ai-explanation-pane p,
body.dark-mode .ai-explanation-pane li,
body.dark-mode .ai-explanation-pane span,
body.dark-mode .ai-bubble-response,
body.dark-mode .ai-bubble-response p,
body.dark-mode .ai-bubble-response li,
body.dark-mode .ai-bubble-response mjx-container {
    color: #d4d4d8 !important; /* Soft, beautiful anti-glare silver gray (Zinc-300) */
}

/* Soft off-white headers for Dark Mode */
body.dark-mode .ai-explanation-pane strong,
body.dark-mode .ai-explanation-pane h1,
body.dark-mode .ai-explanation-pane h2,
body.dark-mode .ai-explanation-pane h3 {
    color: #f4f4f5 !important; /* Matte white heading highlights (Zinc-100) */
}

/* --- DYNAMIC FORM FIELD & CHAT BUBBLE TUNING --- */
.ai-doubt-input {
    background: var(--bg-color) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-color) !important;
}

.student-chat-bubble {
    background: rgba(128, 128, 128, 0.05) !important;
    border-left: 3px solid var(--text-muted) !important;
    color: var(--text-color) !important;
}

.ai-loading-bubble {
    color: var(--text-muted) !important;
}

/* --- ULTRA-THIN GHOST SCROLLBAR DECORATIONS --- */
.ai-explanation-pane,
.ai-chat-scroller {
    scrollbar-width: thin !important;
}

.ai-explanation-pane::-webkit-scrollbar,
.ai-chat-scroller::-webkit-scrollbar {
    width: 5px !important;
    height: 5px !important;
}

.ai-explanation-pane::-webkit-scrollbar-track,
.ai-chat-scroller::-webkit-scrollbar-track {
    background: transparent !important;
}

/* Smooth contextual scroll thumbs that blend into the theme */
.ai-explanation-pane::-webkit-scrollbar-thumb,
.ai-chat-scroller::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15) !important;
    border-radius: 99px !important;
}

body.dark-mode .ai-explanation-pane::-webkit-scrollbar-thumb,
body.dark-mode .ai-chat-scroller::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1) !important;
}


/* ==========================================================================
   DYNAMIC GEMINI INTERFACE & LOW-PROFILE SCROLL EMBED
   ========================================================================== */

/* Structure adjustment for the chat area inside your split pane */
.ai-explanation-pane {
    background: var(--card-bg) !important;
    display: flex;
    flex-direction: column;
}

/* 1. Low-Contrast Scrollbars (Hides the harsh native bars) */
.ai-chat-scroller, 
.ai-explanation-pane,
div[class*="-scroller"] {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.08) transparent;
}

/* Webkit Scrollbar Dimensions (Chrome, Safari, Edge) */
.ai-chat-scroller::-webkit-scrollbar,
.ai-explanation-pane::-webkit-scrollbar,
div[class*="-scroller"]::-webkit-scrollbar {
    width: 5px; /* Extremely thin architectural tracking */
    height: 5px;
}

/* Clean transparent tracks */
.ai-chat-scroller::-webkit-scrollbar-track,
.ai-explanation-pane::-webkit-scrollbar-track,
div[class*="-scroller"]::-webkit-scrollbar-track {
    background: transparent;
}

/* Semi-transparent thumb piece that fades away */
.ai-chat-scroller::-webkit-scrollbar-thumb,
.ai-explanation-pane::-webkit-scrollbar-thumb,
div[class*="-scroller"]::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1); 
    border-radius: 99px;
    transition: background 0.2s ease;
}

/* Reveal gently on direct cursor hover interactions */
.ai-chat-scroller::-webkit-scrollbar-thumb:hover,
.ai-explanation-pane::-webkit-scrollbar-thumb:hover,
div[class*="-scroller"]::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Light mode override adjustment for scrollbars */
body:not(.dark-mode) .ai-chat-scroller::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.12);
}

/* 2. Soft-Contrast Styles for Injected Chat Elements */
.ai-doubt-input {
    background: rgba(0, 0, 0, 0.2) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-color) !important;
}

.dark-mode .ai-doubt-input {
    background: #09090b !important; /* Deep internal well input fields */
}

/* Balance LaTeX block math display text rendering inside answers */
.ai-bubble-response p, 
.ai-bubble-response li {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-color);
}


/* Prevents your question container tablets from stretching with empty dead space */
.exam-card, .question-card, .quiz-card, [id*="card"] {
    height: auto !important;
    min-height: unset !important;
    max-height: none !important;
    padding-bottom: 20px !important;
}





/* ==========================================================================
   CENTRALIZED DARK EXAMS HUB CORE STYLES
   ========================================================================== */

/* Navbar Container Extensions */
.portal-navbar {
    backdrop-filter: blur(8px);
    background: rgba(var(--bg-color), 0.85);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between; /* Pushes brand left, button right */
    align-items: center;
}

/* Brand Logo Elements */
.navbar-logo {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}
.navbar-logo .logo-subtext {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.95rem;
    border-left: 1px solid var(--border-color);
    padding-left: 8px;
}

/* Structural Layout Layouts */
.portal-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 24px;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}
.welcome-hero {
    margin-bottom: 48px;
    text-align: left;
}
.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--text-color);
    margin: 0 0 12px 0;
}
.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
    max-width: 600px;
}
.terminal-header {
    font-family: 'Space Mono', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* Gateway Selector Grids */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}
.subject-card {
    text-decoration: none;
    background: var(--card-bg);
    padding: 24px;
    text-align: left;
    border-radius: var(--radius-sharp);
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: var(--transition-smooth);
}
.subject-card .node-identifier {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}
.subject-card .exam-title-text {
    font-size: 1.25rem;
    font-weight: 700;
    display: block;
    margin-bottom: 4px;
}
.subject-card .card-description {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Active vs Blocked Modifiers */
.subject-card.active-card {
    border: 1px solid var(--text-color);
    color: var(--text-color);
}
.subject-card.active-card:hover {
    opacity: 0.85;
}
.subject-card.disabled-card {
    border: 1px solid var(--border-color);
    color: var(--text-color);
    opacity: 0.5;
    cursor: not-allowed;
}

/* Monochromatic Theme Action Controls Toggle Switch */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sharp);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}
.theme-toggle-btn:hover {
    background: var(--border-color);
}

/* SVG Visibility Triggers Based On Active Core Themes */
body.dark-mode .theme-toggle-btn .moon-icon {
    display: none;
}
body:not(.dark-mode) .theme-toggle-btn .sun-icon {
    display: none;
}

/* ==========================================================================
   DARK EXAMS CYBER-MINIMALIST HUB CARD STYLES
   ========================================================================== */

/* Main Portal Layout Architecture */
.portal-navbar {
    backdrop-filter: blur(8px);
    background: rgba(var(--bg-color), 0.85);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.portal-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 24px;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}
.welcome-hero {
    margin-bottom: 48px;
    text-align: left;
}
.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--text-color);
    margin: 0 0 12px 0;
}
.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
    max-width: 600px;
}
.terminal-header {
    font-family: 'Space Mono', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 24px;
}
.portal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

/* Master Portal Node Cards Base Layout */
.active-portal-card,
.disabled-portal-card {
    text-decoration: none;
    background: var(--card-bg);
    padding: 24px;
    text-align: left;
    border-radius: var(--radius-sharp);
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    overflow: hidden;
    transition: border-color 0.25s ease, transform 0.2s ease, opacity 0.25s ease;
    box-sizing: border-box;
}

/* Operational States Setup */
.active-portal-card {
    border: 1px solid var(--border-color);
    color: var(--text-color);
    cursor: pointer;
}
.disabled-portal-card {
    border: 1px dashed var(--border-color);
    color: var(--text-color);
    opacity: 0.45;
    cursor: not-allowed;
}

/* Code Node Identity Wrappers */
.card-identity-wrapper {
    display: inline-flex;
    align-items: center;
    position: relative;
}

/* Interactive Dynamic Block Cursor Micro-Animations */
.active-portal-card .card-identity-wrapper::after {
    content: "▮";
    font-family: monospace;
    font-size: 1.7rem;
    color: var(--text-muted);
    margin-left: 6px;
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity 0.2s ease, transform 0.2s ease, color 0.2s ease;
}
.active-portal-card:hover {
    border-color: var(--text-color);
    transform: translateY(-2px);
}
.active-portal-card:hover .card-identity-wrapper::after {
    opacity: 1;
    transform: translateX(0);
    color: var(--text-color);
}

/* Terminal Bracket Text Labels */
.card-description-bracket {
    font-family: 'Space Mono', monospace;
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: -0.01em;
    text-transform: uppercase;
    transition: color 0.2s ease;
}
.active-portal-card:hover .card-description-bracket {
    color: var(--text-color);
}

/* Navigation Button Components */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sharp);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}
.theme-toggle-btn:hover {
    background: var(--border-color);
}
body.dark-mode .theme-toggle-btn .moon-icon {
    display: none;
}
body:not(.dark-mode) .theme-toggle-btn .sun-icon {
    display: none;
}