/* ============================================================
   MARUTI.FUN - MULTI-MORPH 8-IN-1 UI DESIGN ENGINE
   Audited & Engineered per Emil Kowalski's Design Engineering Skill:
   - Custom cubic-bezier easing (--ease-out: cubic-bezier(0.23, 1, 0.32, 1))
   - Zero `transition: all` (explicit GPU-friendly properties < 200ms)
   - Tactile `:active` scale(0.97) feedback on all interactive controls
   - @media (hover: hover) and (pointer: fine) guards for touch devices
   - Smooth modal scale(0.96) -> scale(1) + opacity entry/exit transitions
   - Tabular numerals (font-variant-numeric: tabular-nums) on timers/metrics
   - Optical font smoothing, text-wrap: balance/pretty & reduced-motion support
   ============================================================ */

:root {
    /* Emil Kowalski Precision Easing Curves */
    --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
    --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
    --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);
}

/* ------------------------------------------------------------
   1. DEFAULT: MAXIMALISM (NEO-BRUTALIST POP & HIGH-ENERGY CONTRAST)
   ------------------------------------------------------------ */
:root,
html[data-ui="maximalism"] {
    --bg-main: #fef08a;
    --bg-page-gradient: radial-gradient(rgba(9, 9, 11, 0.14) 1px, transparent 1px),
                        linear-gradient(135deg, #fef08a 0%, #fed7aa 52%, #fbcfe8 100%);
    --card-bg: #ffffff;
    --inset-bg: #fef9c3;
    --btn-bg: #a7f3d0;
    --text-primary: #09090b;
    --text-secondary: #1e293b;
    --text-muted: #334155;
    --accent-primary: #6d28d9;
    --accent-secondary: #0369a1;
    --accent-success: #15803d;
    --accent-warning: #b45309;
    --accent-danger: #be123c;

    --neu-flat: 6px 6px 0px #09090b;
    --neu-sm: 4px 4px 0px #09090b;
    --neu-lg: 9px 9px 0px #09090b;
    --neu-inset: inset 3px 3px 0px rgba(9, 9, 11, 0.1);
    --neu-inset-sm: 3px 3px 0px #09090b;

    --border-card: 3px solid #09090b;
    --border-btn: 2.5px solid #09090b;
    --border-input: 2.5px solid #09090b;
    --radius-card: 14px;
    --radius-btn: 10px;
    --radius-input: 10px;
    --card-backdrop: none;
    --code-bg: #fde68a;
    --primary-btn-bg: #6d28d9;
    --primary-btn-shadow: 4px 4px 0px #09090b;
}

html[data-ui="maximalism"] body {
    background-size: 24px 24px, 100% 100%;
}

/* ------------------------------------------------------------
   2. NEUMORPHISM (SOFT UI)
   ------------------------------------------------------------ */
html[data-ui="neumorphism"] {
    --bg-main: #e0e5ec;
    --bg-page-gradient: none;
    --card-bg: #e0e5ec;
    --inset-bg: #e0e5ec;
    --btn-bg: #e0e5ec;
    --text-primary: #2d3748;
    --text-secondary: #5a677d;
    --text-muted: #7b889e;
    --accent-primary: #4f46e5;
    --accent-secondary: #0891b2;
    --accent-success: #059669;
    --accent-warning: #d97706;
    --accent-danger: #e11d48;

    --shadow-dark: #a3b1c6;
    --shadow-light: #ffffff;

    --neu-flat: 8px 8px 16px var(--shadow-dark), -8px -8px 16px var(--shadow-light);
    --neu-sm: 4px 4px 8px var(--shadow-dark), -4px -4px 8px var(--shadow-light);
    --neu-lg: 12px 12px 24px var(--shadow-dark), -12px -12px 24px var(--shadow-light);
    --neu-inset: inset 5px 5px 10px var(--shadow-dark), inset -5px -5px 10px var(--shadow-light);
    --neu-inset-sm: inset 3px 3px 6px var(--shadow-dark), inset -3px -3px 6px var(--shadow-light);

    --border-card: 1px solid rgba(255, 255, 255, 0.45);
    --border-btn: 1px solid rgba(255, 255, 255, 0.45);
    --border-input: 1px solid transparent;
    --radius-card: 22px;
    --radius-btn: 14px;
    --radius-input: 14px;
    --card-backdrop: none;
    --code-bg: #d3dae4;
    --primary-btn-bg: linear-gradient(135deg, #4f46e5, #6366f1);
    --primary-btn-shadow: var(--neu-sm);
}

/* ------------------------------------------------------------
   3. GLASSMORPHISM (TRANSLUCENT FROSTED GLASS)
   ------------------------------------------------------------ */
html[data-ui="glassmorphism"] {
    --bg-main: #dbeafe;
    --bg-page-gradient: radial-gradient(at 12% 15%, #c7d2fe 0px, transparent 50%),
                        radial-gradient(at 85% 20%, #fbcfe8 0px, transparent 50%),
                        radial-gradient(at 75% 85%, #a5f3fc 0px, transparent 50%),
                        radial-gradient(at 15% 85%, #ddd6fe 0px, transparent 50%),
                        linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 50%, #cffafe 100%);
    --card-bg: rgba(255, 255, 255, 0.52);
    --inset-bg: rgba(255, 255, 255, 0.38);
    --btn-bg: rgba(255, 255, 255, 0.65);
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --accent-primary: #4338ca;
    --accent-secondary: #0369a1;

    --neu-flat: 0 12px 32px 0 rgba(31, 38, 135, 0.11);
    --neu-sm: 0 4px 14px 0 rgba(31, 38, 135, 0.08);
    --neu-lg: 0 18px 42px 0 rgba(31, 38, 135, 0.16);
    --neu-inset: inset 0 2px 6px rgba(15, 23, 42, 0.07);
    --neu-inset-sm: inset 0 1px 4px rgba(15, 23, 42, 0.07);

    --border-card: 1px solid rgba(255, 255, 255, 0.68);
    --border-btn: 1px solid rgba(255, 255, 255, 0.78);
    --border-input: 1px solid rgba(255, 255, 255, 0.65);
    --radius-card: 24px;
    --radius-btn: 14px;
    --radius-input: 14px;
    --card-backdrop: blur(14px) saturate(160%);
    --code-bg: rgba(255, 255, 255, 0.55);
}

/* ------------------------------------------------------------
   4. SKEUOMORPHISM (REALISTIC TACTILE HARDWARE & BEVELS)
   ------------------------------------------------------------ */
html[data-ui="skeuomorphism"] {
    --bg-main: #d7d2c8;
    --bg-page-gradient: repeating-linear-gradient(45deg, rgba(0,0,0,0.015) 0px, rgba(0,0,0,0.015) 2px, transparent 2px, transparent 4px),
                        linear-gradient(180deg, #dedad0 0%, #cdc7bb 100%);
    --card-bg: linear-gradient(180deg, #f7f5f0 0%, #e5e0d5 100%);
    --inset-bg: #e2ddd2;
    --btn-bg: linear-gradient(180deg, #fdfcfb 0%, #dcd6ca 100%);
    --text-primary: #22201d;
    --text-secondary: #4e4942;
    --text-muted: #736c61;
    --accent-primary: #b45309;
    --accent-secondary: #0f766e;
    --accent-success: #15803d;

    --neu-flat: 0 3px 6px rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.9), 0 0 0 1px #9c9488;
    --neu-sm: 0 2px 4px rgba(0,0,0,0.24), inset 0 1px 0 #ffffff, 0 0 0 1px #8c8478;
    --neu-lg: 0 8px 18px rgba(0,0,0,0.3), inset 0 1px 0 #ffffff, 0 0 0 1px #8c8478;
    --neu-inset: inset 0 3px 7px rgba(0,0,0,0.35), inset 0 0 0 1px #7d7569, 0 1px 0 rgba(255,255,255,0.8);
    --neu-inset-sm: inset 0 2px 5px rgba(0,0,0,0.3), 0 1px 0 rgba(255,255,255,0.8);

    --border-card: 2px solid #b5ae9e;
    --border-btn: 1px solid #91897c;
    --border-input: 1px solid #8a8275;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-input: 8px;
    --card-backdrop: none;
    --code-bg: #dad4c8;
    --primary-btn-bg: linear-gradient(180deg, #ea580c 0%, #9a3412 100%);
    --primary-btn-shadow: 0 2px 4px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.45);
}

/* ------------------------------------------------------------
   5. CLAYMORPHISM (PLAYFUL 3D INFLATED CLAY SURFACES)
   ------------------------------------------------------------ */
html[data-ui="claymorphism"] {
    --bg-main: #f0f4ff;
    --bg-page-gradient: linear-gradient(135deg, #eef2ff 0%, #fce7f3 55%, #e0f2fe 100%);
    --card-bg: #ffffff;
    --inset-bg: #f5f7ff;
    --btn-bg: #ffffff;
    --text-primary: #1e1b4b;
    --text-secondary: #4338ca;
    --text-muted: #6366f1;
    --accent-primary: #4f46e5;
    --accent-secondary: #db2777;
    --accent-success: #059669;
    --accent-warning: #d97706;
    --accent-danger: #e11d48;

    --neu-flat: 0 16px 30px rgba(99, 102, 241, 0.14),
                inset -6px -6px 14px rgba(199, 210, 254, 0.75),
                inset 6px 6px 14px rgba(255, 255, 255, 0.95);
    --neu-sm: 0 8px 16px rgba(99, 102, 241, 0.14),
              inset -4px -4px 8px rgba(199, 210, 254, 0.7),
              inset 4px 4px 8px rgba(255, 255, 255, 0.95);
    --neu-lg: 0 22px 38px rgba(99, 102, 241, 0.2),
              inset -8px -8px 16px rgba(199, 210, 254, 0.8),
              inset 8px 8px 16px rgba(255, 255, 255, 1);
    --neu-inset: inset 6px 6px 12px rgba(165, 180, 252, 0.45),
                 inset -6px -6px 12px #ffffff;
    --neu-inset-sm: inset 4px 4px 8px rgba(165, 180, 252, 0.45),
                    inset -4px -4px 8px #ffffff;

    --border-card: 2px solid rgba(255, 255, 255, 0.85);
    --border-btn: 2px solid rgba(255, 255, 255, 0.9);
    --border-input: 2px solid #e0e7ff;
    --radius-card: 32px;
    --radius-btn: 20px;
    --radius-input: 20px;
    --card-backdrop: none;
    --code-bg: #eef2ff;
    --primary-btn-bg: linear-gradient(135deg, #818cf8 0%, #4f46e5 100%);
    --primary-btn-shadow: 0 10px 20px rgba(79, 70, 229, 0.3),
                          inset -4px -4px 8px rgba(49, 46, 129, 0.4),
                          inset 4px 4px 8px rgba(255, 255, 255, 0.45);
}

/* ------------------------------------------------------------
   6. MINIMALISM (SWISS CLEAN / HIGH-CONTRAST EDITORIAL)
   ------------------------------------------------------------ */
html[data-ui="minimalism"] {
    --bg-main: #fafafa;
    --bg-page-gradient: none;
    --card-bg: #ffffff;
    --inset-bg: #f4f4f5;
    --btn-bg: #ffffff;
    --text-primary: #09090b;
    --text-secondary: #52525b;
    --text-muted: #71717a;
    --accent-primary: #18181b;
    --accent-secondary: #2563eb;
    --accent-success: #16a34a;
    --accent-warning: #ca8a04;
    --accent-danger: #dc2626;

    --neu-flat: 0 1px 2px rgba(0, 0, 0, 0.04);
    --neu-sm: 0 1px 2px rgba(0, 0, 0, 0.03);
    --neu-lg: 0 6px 16px rgba(0, 0, 0, 0.06);
    --neu-inset: none;
    --neu-inset-sm: none;

    --border-card: 1px solid rgba(9, 9, 11, 0.09);
    --border-btn: 1px solid rgba(9, 9, 11, 0.14);
    --border-input: 1px solid rgba(9, 9, 11, 0.14);
    --radius-card: 10px;
    --radius-btn: 7px;
    --radius-input: 7px;
    --card-backdrop: none;
    --code-bg: #f4f4f5;
    --primary-btn-bg: #09090b;
    --primary-btn-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

/* ------------------------------------------------------------
   7. BENTO GRID UI (APPLE / LINEAR MODULAR COMPARTMENTS)
   ------------------------------------------------------------ */
html[data-ui="bento"] {
    --bg-main: #f1f5f9;
    --bg-page-gradient: linear-gradient(180deg, #f8fafc 0%, #eef2f6 100%);
    --card-bg: #ffffff;
    --inset-bg: #f8fafc;
    --btn-bg: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent-primary: #2563eb;
    --accent-secondary: #0891b2;
    --accent-success: #059669;
    --accent-warning: #d97706;
    --accent-danger: #e11d48;

    --neu-flat: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 0 0 1px rgba(15, 23, 42, 0.06);
    --neu-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --neu-lg: 0 12px 28px -4px rgba(15, 23, 42, 0.1), 0 0 0 1px rgba(37, 99, 235, 0.2);
    --neu-inset: inset 0 1px 2px rgba(15, 23, 42, 0.04);
    --neu-inset-sm: 0 1px 2px rgba(15, 23, 42, 0.05);

    --border-card: 1px solid rgba(15, 23, 42, 0.08);
    --border-btn: 1px solid rgba(15, 23, 42, 0.12);
    --border-input: 1px solid rgba(15, 23, 42, 0.12);
    --radius-card: 26px;
    --radius-btn: 12px;
    --radius-input: 12px;
    --card-backdrop: none;
    --code-bg: #f1f5f9;
    --primary-btn-bg: linear-gradient(180deg, #3b82f6 0%, #2563eb 100%);
    --primary-btn-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* ------------------------------------------------------------
   8. SPATIAL UI (APPLE VISIONOS FLOATING DEPTH WINDOWS)
   ------------------------------------------------------------ */
html[data-ui="spatial"] {
    --bg-main: #0b0f19;
    --bg-page-gradient: radial-gradient(circle at 20% 20%, rgba(79, 70, 229, 0.32) 0%, transparent 45%),
                        radial-gradient(circle at 80% 30%, rgba(14, 165, 233, 0.26) 0%, transparent 45%),
                        radial-gradient(circle at 50% 85%, rgba(168, 85, 247, 0.25) 0%, transparent 50%),
                        linear-gradient(160deg, #090d16 0%, #111827 50%, #0f172a 100%);
    --card-bg: rgba(30, 41, 59, 0.56);
    --inset-bg: rgba(15, 23, 42, 0.55);
    --btn-bg: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-primary: #38bdf8;
    --accent-secondary: #a78bfa;
    --accent-success: #34d399;
    --accent-warning: #fbbf24;
    --accent-danger: #fb7185;

    --neu-flat: 0 24px 48px rgba(0, 0, 0, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.28);
    --neu-sm: 0 8px 20px rgba(0, 0, 0, 0.35), inset 0 1px 1px rgba(255, 255, 255, 0.22);
    --neu-lg: 0 30px 60px rgba(0, 0, 0, 0.65), inset 0 1px 2px rgba(255, 255, 255, 0.4);
    --neu-inset: inset 0 3px 10px rgba(0, 0, 0, 0.55), 0 1px 0 rgba(255, 255, 255, 0.1);
    --neu-inset-sm: inset 0 2px 6px rgba(0, 0, 0, 0.45);

    --border-card: 1px solid rgba(255, 255, 255, 0.16);
    --border-btn: 1px solid rgba(255, 255, 255, 0.2);
    --border-input: 1px solid rgba(255, 255, 255, 0.18);
    --radius-card: 28px;
    --radius-btn: 999px;
    --radius-input: 18px;
    --card-backdrop: blur(20px) saturate(180%);
    --code-bg: rgba(15, 23, 42, 0.75);
    --primary-btn-bg: linear-gradient(135deg, rgba(56, 189, 248, 0.9), rgba(99, 102, 241, 0.9));
    --primary-btn-shadow: 0 8px 25px rgba(56, 189, 248, 0.35), inset 0 1px 1px rgba(255, 255, 255, 0.5);
}

/* ------------------------------------------------------------
   DARK MODE OVERRIDES (WORKS ACROSS ALL UI STYLES)
   ------------------------------------------------------------ */
html[data-theme="dark"] {
    --bg-main: #1e2229;
    --bg-page-gradient: none;
    --card-bg: #1e2229;
    --inset-bg: #1a1d24;
    --btn-bg: #1e2229;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #818cf8;
    --accent-secondary: #22d3ee;
    --accent-success: #34d399;
    --accent-warning: #fbbf24;
    --accent-danger: #fb7185;

    --shadow-dark: #14171c;
    --shadow-light: #282d36;

    --neu-flat: 7px 7px 14px var(--shadow-dark), -7px -7px 14px var(--shadow-light);
    --neu-sm: 4px 4px 8px var(--shadow-dark), -4px -4px 8px var(--shadow-light);
    --neu-lg: 11px 11px 22px var(--shadow-dark), -11px -11px 22px var(--shadow-light);
    --neu-inset: inset 5px 5px 10px var(--shadow-dark), inset -5px -5px 10px var(--shadow-light);
    --neu-inset-sm: inset 3px 3px 6px var(--shadow-dark), inset -3px -3px 6px var(--shadow-light);
    --border-card: 1px solid rgba(255, 255, 255, 0.06);
    --border-btn: 1px solid rgba(255, 255, 255, 0.08);
    --code-bg: #15181e;
}

/* ============================================================
   BASE TYPOGRAPHY & OPTICAL RENDERING (emil-design-eng)
   ============================================================ */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-main);
    background-image: var(--bg-page-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
    text-wrap: balance;
    letter-spacing: -0.02em;
}

p {
    text-wrap: pretty;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 150ms var(--ease-out), opacity 150ms var(--ease-out);
}

/* Keyboard Focus Ring */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.tabular-nums,
#quizTimerDisplay,
.neu-table td,
.neu-pill,
.badge-type {
    font-variant-numeric: tabular-nums;
}

.container {
    width: 100%;
    max-width: 1260px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================================
   FLOATING UI THEME POPOVER (ZERO EXTRA LAYOUT SPACE)
   ============================================================ */
.ui-theme-popover {
    position: absolute;
    top: calc(100% + 10px);
    right: 16px;
    width: min(360px, calc(100vw - 32px));
    background: var(--card-bg);
    backdrop-filter: var(--card-backdrop);
    -webkit-backdrop-filter: var(--card-backdrop);
    border: var(--border-card);
    border-radius: var(--radius-card);
    box-shadow: var(--neu-lg);
    padding: 14px;
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: scale(0.96) translateY(-4px);
    transform-origin: top right;
    transition: opacity 160ms var(--ease-out),
                transform 160ms var(--ease-out),
                visibility 160ms var(--ease-out);
}

.ui-theme-popover.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scale(1) translateY(0);
}

.ui-popover-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(163, 177, 198, 0.3);
}

.ui-popover-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.ui-style-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 34px;
    padding: 5px 12px;
    border-radius: var(--radius-btn);
    background: var(--btn-bg);
    box-shadow: var(--neu-sm);
    border: var(--border-btn);
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
    transition: transform 160ms var(--ease-out),
                box-shadow 160ms var(--ease-out),
                background-color 150ms var(--ease-out),
                color 150ms var(--ease-out);
}

.ui-style-chip:active {
    transform: scale(0.97);
}

.ui-style-chip.active {
    background: var(--primary-btn-bg);
    color: #ffffff !important;
    box-shadow: var(--primary-btn-shadow);
}

/* ============================================================
   MORPHIC SURFACES & CARDS
   ============================================================ */
.neu-card {
    background: var(--card-bg);
    backdrop-filter: var(--card-backdrop);
    -webkit-backdrop-filter: var(--card-backdrop);
    border-radius: var(--radius-card);
    box-shadow: var(--neu-flat);
    border: var(--border-card);
    padding: 24px;
    transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}

.neu-inset {
    background: var(--inset-bg);
    border-radius: var(--radius-input);
    box-shadow: var(--neu-inset);
    border: var(--border-input);
    padding: 16px;
}

.neu-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--btn-bg);
    box-shadow: var(--neu-sm);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    border: var(--border-btn);
    transition: transform 150ms var(--ease-out),
                box-shadow 150ms var(--ease-out),
                color 150ms var(--ease-out);
}

.neu-pill:active {
    transform: scale(0.97);
}

.neu-pill.active,
.neu-btn-filter.active {
    box-shadow: var(--neu-inset-sm);
    color: var(--accent-primary);
    font-weight: 700;
}

/* ============================================================
   MORPHIC BUTTONS (Tactile scale(0.97) on :active)
   ============================================================ */
.neu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 40px;
    padding: 10px 20px;
    border-radius: var(--radius-btn);
    background: var(--btn-bg);
    box-shadow: var(--neu-sm);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.94rem;
    border: var(--border-btn);
    cursor: pointer;
    user-select: none;
    text-decoration: none;
    transition: transform 160ms var(--ease-out),
                box-shadow 160ms var(--ease-out),
                background-color 150ms var(--ease-out),
                color 150ms var(--ease-out),
                filter 150ms var(--ease-out);
}

.neu-btn:active,
.neu-btn.pressed {
    transform: scale(0.97);
    box-shadow: var(--neu-inset-sm);
    color: var(--accent-primary);
}

.neu-btn-primary {
    color: #ffffff !important;
    background: var(--primary-btn-bg);
    box-shadow: var(--primary-btn-shadow);
}

.neu-btn-danger {
    color: var(--accent-danger) !important;
}

.neu-btn-success {
    color: var(--accent-success) !important;
}

.neu-btn-sm {
    min-height: 36px;
    padding: 7px 14px;
    font-size: 0.83rem;
}

.neu-icon-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--btn-bg);
    box-shadow: var(--neu-sm);
    color: var(--text-primary);
    border: var(--border-btn);
    cursor: pointer;
    user-select: none;
    transition: transform 160ms var(--ease-out),
                box-shadow 160ms var(--ease-out),
                color 150ms var(--ease-out);
}

.neu-icon-btn:active {
    transform: scale(0.95);
}

/* ============================================================
   HOVER INTERACTIONS GUARDED FOR POINTER DEVICES ONLY
   Prevents sticky hover artifacts on mobile touch screens
   ============================================================ */
@media (hover: hover) and (pointer: fine) {
    .neu-card-hover:hover {
        transform: translateY(-3px);
        box-shadow: var(--neu-lg);
    }

    .ui-style-chip:hover {
        color: var(--accent-primary);
        transform: translateY(-1px);
    }

    .neu-btn:hover {
        color: var(--accent-primary);
        transform: translateY(-1px);
        box-shadow: var(--neu-flat);
    }

    .neu-btn-primary:hover {
        color: #ffffff !important;
        filter: brightness(1.07);
    }

    .neu-icon-btn:hover {
        color: var(--accent-primary);
        box-shadow: var(--neu-inset-sm);
    }

    .video-thumb-box:hover img {
        transform: scale(1.03);
        opacity: 1;
    }

    .video-thumb-box:hover .play-btn-circle {
        transform: scale(1.08);
    }

    .quiz-option-label:hover {
        transform: translateX(3px);
    }
}

/* ============================================================
   MORPHIC INPUTS, SELECTS & SEARCH BARS
   ============================================================ */
.neu-input,
.neu-select,
.neu-textarea {
    width: 100%;
    padding: 13px 18px;
    border-radius: var(--radius-input);
    background: var(--inset-bg);
    box-shadow: var(--neu-inset);
    border: var(--border-input);
    color: var(--text-primary);
    font-size: 0.96rem;
    font-family: inherit;
    outline: none;
    transition: border-color 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}

.neu-input:focus,
.neu-select:focus,
.neu-textarea:focus {
    border-color: var(--accent-primary);
}

.neu-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%235a677d' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 42px;
}

.neu-select option {
    background-color: var(--bg-main);
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

/* ============================================================
   TOP ANNOUNCEMENT BAR & RESPONSIVE NAVBAR
   ============================================================ */
.announcement-bar {
    background: var(--inset-bg);
    box-shadow: var(--neu-inset-sm);
    padding: 8px 16px;
    font-size: 0.84rem;
    text-align: center;
    color: var(--text-secondary);
    font-weight: 500;
}

.announcement-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 6px 12px;
}

.announcement-yt-link {
    font-weight: 700;
    white-space: nowrap;
}

.navbar-wrapper {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 0;
}

.neu-navbar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-radius: var(--radius-card);
    background: var(--card-bg);
    backdrop-filter: var(--card-backdrop);
    -webkit-backdrop-filter: var(--card-backdrop);
    box-shadow: var(--neu-flat);
    border: var(--border-card);
    gap: 14px;
}

.navbar-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-width: 0;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 11px;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-primary);
    min-width: 0;
}

.brand-text-wrap {
    min-width: 0;
}

.brand-title {
    line-height: 1.15;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.brand-subtitle {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.brand-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-btn);
    background: var(--btn-bg);
    box-shadow: var(--neu-sm);
    border: var(--border-btn);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-size: 1.3rem;
    flex-shrink: 0;
}

.navbar-mobile-controls {
    display: none;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.mobile-only-label {
    display: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 9px;
    flex-wrap: wrap;
}

@keyframes mobileMenuEnter {
    from {
        opacity: 0;
        transform: translateY(-6px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ============================================================
   GRID LAYOUTS & BADGES
   ============================================================ */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 330px), 1fr));
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 310px), 1fr));
    gap: 24px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
    gap: 20px;
}

.badge-type {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 11px;
    border-radius: 10px;
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    background: var(--inset-bg);
    box-shadow: var(--neu-inset-sm);
    border: var(--border-btn);
}

.badge-video { color: #e11d48; }
.badge-notes { color: var(--accent-primary); }
.badge-book  { color: #d97706; }
.badge-pdf   { color: #059669; }

/* ============================================================
   VIDEO THUMBNAIL & SMOOTH ANIMATED MODAL (emil-design-eng)
   Uses scale(0.96) -> scale(1) + opacity with --ease-out
   ============================================================ */
.video-thumb-box {
    position: relative;
    border-radius: var(--radius-input);
    overflow: hidden;
    box-shadow: var(--neu-inset-sm);
    border: var(--border-btn);
    margin-bottom: 16px;
    aspect-ratio: 16 / 9;
    background: #1a202c;
    cursor: pointer;
}

.video-thumb-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.92;
    transition: transform 240ms var(--ease-out), opacity 200ms var(--ease-out);
}

.play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.28);
}

.play-btn-circle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(225, 29, 72, 0.92);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: transform 180ms var(--ease-out);
}

/* Smooth Modal Backdrop & Content (No abrupt display:none jump) */
.neu-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.72);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 180ms var(--ease-out), visibility 180ms var(--ease-out);
}

.neu-modal-backdrop.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.neu-modal-content {
    background: var(--card-bg);
    backdrop-filter: var(--card-backdrop);
    -webkit-backdrop-filter: var(--card-backdrop);
    border-radius: var(--radius-card);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
    width: 100%;
    max-width: 860px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 26px;
    border: var(--border-card);
    transform: scale(0.96) translateY(6px);
    transform-origin: center center;
    transition: transform 200ms var(--ease-out);
}

.neu-modal-backdrop.open .neu-modal-content {
    transform: scale(1) translateY(0);
}

/* ============================================================
   QUIZ ENGINE & OPTION CARDS
   ============================================================ */
.quiz-option-label {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    margin-bottom: 14px;
    border-radius: var(--radius-input);
    background: var(--btn-bg);
    box-shadow: var(--neu-sm);
    cursor: pointer;
    user-select: none;
    border: var(--border-btn);
    transition: transform 160ms var(--ease-out),
                box-shadow 160ms var(--ease-out),
                border-color 150ms var(--ease-out);
}

.quiz-option-label:active {
    transform: scale(0.985);
}

.quiz-option-label input[type="radio"] {
    display: none;
}

.quiz-option-letter {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--inset-bg);
    box-shadow: var(--neu-inset-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.quiz-option-label.selected {
    box-shadow: var(--neu-inset);
    border: 2px solid var(--accent-primary);
}

.quiz-option-label.selected .quiz-option-letter {
    background: var(--accent-primary);
    color: #fff;
    box-shadow: none;
}

.code-block {
    background: var(--code-bg);
    box-shadow: var(--neu-inset-sm);
    padding: 14px 18px;
    border-radius: 12px;
    font-family: 'Fira Code', Consolas, monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    margin: 12px 0;
    white-space: pre-wrap;
}

/* ============================================================
   TABLES
   ============================================================ */
.neu-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-input);
    background: var(--inset-bg);
    box-shadow: var(--neu-inset-sm);
    border: var(--border-input);
    padding: 8px;
}

.neu-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.neu-table th,
.neu-table td {
    padding: 13px 16px;
    text-align: left;
    border-bottom: 1px solid rgba(163, 177, 198, 0.25);
}

.neu-table th {
    font-weight: 700;
    color: var(--text-secondary);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================================
   ALERTS & FOOTER
   ============================================================ */
.neu-alert {
    padding: 14px 20px;
    border-radius: var(--radius-input);
    background: var(--inset-bg);
    box-shadow: var(--neu-inset-sm);
    margin-bottom: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.neu-alert-success { color: var(--accent-success); border-left: 4px solid var(--accent-success); }
.neu-alert-danger  { color: var(--accent-danger);  border-left: 4px solid var(--accent-danger); }
.neu-alert-warning { color: var(--accent-warning); border-left: 4px solid var(--accent-warning); }

.footer-area {
    margin-top: auto;
    padding: 45px 0 30px;
}

/* ============================================================
   REDUCED MOTION ACCESSIBILITY (emil-design-eng)
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (max-width: 960px) {
    .navbar-wrapper {
        padding: 8px 0;
    }

    .neu-navbar {
        flex-direction: column;
        align-items: stretch;
        padding: 10px 14px;
        gap: 0;
    }

    .navbar-top-row {
        width: 100%;
    }

    .navbar-mobile-controls {
        display: flex;
    }

    .desktop-theme-btn {
        display: none !important;
    }

    .mobile-only-label {
        display: inline;
    }

    .nav-links {
        display: none;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        width: 100%;
        margin-top: 12px;
        padding-top: 12px;
        border-top: 1px solid rgba(163, 177, 198, 0.35);
    }

    .nav-links.mobile-open {
        display: grid;
        animation: mobileMenuEnter 180ms var(--ease-out) forwards;
    }

    .nav-links .neu-btn {
        width: 100%;
        justify-content: flex-start;
        min-height: 44px;
        padding: 10px 14px;
        font-size: 0.88rem;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .container {
        padding: 0 14px;
    }

    .brand-title {
        font-size: 1.08rem;
    }

    .brand-subtitle {
        font-size: 0.65rem;
        max-width: 175px;
    }

    .nav-links {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .neu-card {
        padding: 18px 16px;
    }

    .ui-switcher-admin-link {
        display: none;
    }
}