/* ============================================
   PIECES OF US — Design System
   A warm, playful, handmade-feeling theme
   ============================================ */

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

/* ── CSS Custom Properties ── */
:root {
    /* Background */
    --bg-cream:     #FFF8F0;
    --bg-light:     #FEF3E2;
    --bg-warm:      #FFF1E6;
    --bg-card:      #FFFFFF;

    /* Pink spectrum */
    --pink-50:      #FDF2F8;
    --pink-100:     #FCE7F3;
    --pink-200:     #FBCFE8;
    --pink-300:     #F9A8D4;
    --pink-400:     #F472B6;
    --pink-500:     #EC4899;
    --pink-600:     #DB2777;
    --pink-700:     #BE185D;

    /* Yellow spectrum */
    --yellow-50:    #FFFBEB;
    --yellow-100:   #FEF3C7;
    --yellow-200:   #FDE68A;
    --yellow-300:   #FCD34D;
    --yellow-400:   #FBBF24;
    --yellow-500:   #F59E0B;
    --yellow-600:   #D97706;

    /* Text */
    --text-dark:    #1F1218;
    --text-mid:     #6B4C5A;
    --text-light:   #9B7A8A;
    --text-muted:   #C4A3B3;

    /* Utility */
    --glass:        rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.85);
    --shadow-soft:  0 4px 24px rgba(190, 24, 93, 0.08);
    --shadow-card:  0 8px 32px rgba(190, 24, 93, 0.12);
    --shadow-float: 0 16px 48px rgba(190, 24, 93, 0.15);
    --radius-sm:    8px;
    --radius-md:    16px;
    --radius-lg:    24px;
    --radius-xl:    32px;
    --radius-full:  9999px;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--pink-400), var(--yellow-400));
    --gradient-warm:    linear-gradient(135deg, var(--pink-100), var(--yellow-100));
    --gradient-sunset:  linear-gradient(135deg, #fce4ec, #fff8e1, #fce4ec);
    --gradient-glow:    radial-gradient(circle, var(--pink-200) 0%, transparent 70%);

    /* Transitions */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);

    /* Dark mode (for finale) */
    --dark-bg:      #0a0a0a;
    --dark-surface:  #1a1a1a;
    --dark-text:    #f3f4f6;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-cream);
    color: var(--text-dark);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--pink-500);
    text-decoration: none;
}

/* ── Typography ── */
h1, h2, h3, h4 {
    font-family: 'Playfair Display', Georgia, serif;
    line-height: 1.2;
    color: var(--text-dark);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); font-weight: 600; }
h3 { font-size: clamp(1.2rem, 3vw, 1.75rem); font-weight: 600; }

.font-handwriting {
    font-family: 'Caveat', cursive;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Glass Panels ── */
.glass-panel {
    background: var(--glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border: none;
    border-radius: var(--radius-full);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--ease-spring);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.2);
    opacity: 0;
    transition: opacity 0.3s;
}

.btn:hover::after {
    opacity: 1;
}

.btn:active {
    transform: scale(0.96);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(236, 72, 153, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 8px 30px rgba(236, 72, 153, 0.45);
}

.btn-secondary {
    background: white;
    color: var(--text-dark);
    box-shadow: var(--shadow-soft);
    border: 2px solid var(--pink-200);
}

.btn-secondary:hover {
    border-color: var(--pink-400);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-mid);
    padding: 10px 20px;
}

.btn-ghost:hover {
    color: var(--pink-500);
    background: var(--pink-50);
}

/* ── Cards ── */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all 0.4s var(--ease-spring);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-float);
}

/* ── Chapter Cards (Hub) ── */
.chapter-card {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s var(--ease-spring);
    border: 2px solid transparent;
    overflow: hidden;
}

.chapter-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s;
}

.chapter-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-float);
    border-color: var(--pink-200);
}

.chapter-card:hover::before {
    opacity: 1;
}

.chapter-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

.chapter-card.locked:hover {
    transform: none;
    box-shadow: var(--shadow-card);
    border-color: transparent;
}

.chapter-card.completed {
    border-color: var(--pink-300);
    background: linear-gradient(135deg, var(--pink-50), var(--yellow-50));
}

.chapter-card.completed::before {
    opacity: 1;
}

.chapter-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    background: var(--gradient-warm);
    transition: transform 0.4s var(--ease-spring);
}

.chapter-card:hover .chapter-icon {
    transform: scale(1.1) rotate(-5deg);
}

.chapter-card.completed .chapter-icon {
    background: var(--gradient-primary);
}

.chapter-number {
    font-family: 'Playfair Display', serif;
    font-size: 0.8rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 6px;
}

.chapter-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.chapter-subtitle {
    font-size: 0.8rem;
    color: var(--text-light);
}

.lock-icon {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 18px;
    opacity: 0.5;
}

.check-icon {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
}

/* ── Page Layout ── */
.page-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px;
    min-height: 100vh;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    margin-bottom: 24px;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: white;
    border: 2px solid var(--pink-200);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-mid);
    cursor: pointer;
    transition: all 0.3s var(--ease-spring);
    font-family: 'Inter', sans-serif;
}

.back-btn:hover {
    border-color: var(--pink-400);
    color: var(--pink-600);
    transform: translateX(-4px);
}

.page-title-area {
    text-align: center;
    margin-bottom: 32px;
}

.page-title-area .chapter-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--pink-400);
    font-weight: 600;
    margin-bottom: 8px;
}

.puzzle-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

/* ── Puzzle Board (Jigsaw) ── */
.jigsaw-board {
    position: relative;
    border-radius: var(--radius-md);
    background: var(--bg-warm);
    border: 3px dashed var(--pink-200);
    overflow: hidden;
}

.jigsaw-piece {
    position: absolute;
    cursor: grab;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    transition: box-shadow 0.2s, transform 0.15s;
    touch-action: none;
    z-index: 1;
}

.jigsaw-piece:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.25);
    z-index: 10;
}

.jigsaw-piece.dragging {
    cursor: grabbing;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    z-index: 100;
    transform: scale(1.05);
}

.jigsaw-piece.placed {
    cursor: default;
    box-shadow: none;
    z-index: 0;
    opacity: 1;
}

.jigsaw-piece.placed::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 4px;
    pointer-events: none;
}

.piece-tray {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    padding: 16px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    max-width: 100%;
}

/* ── Crossword ── */
.crossword-grid {
    display: inline-grid;
    gap: 2px;
    background: var(--pink-200);
    padding: 2px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-card);
}

.crossword-cell {
    width: 42px;
    height: 42px;
    position: relative;
}

.crossword-cell input {
    width: 100%;
    height: 100%;
    border: none;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    background: white;
    color: var(--text-dark);
    caret-color: var(--pink-500);
    outline: none;
    transition: background 0.3s;
}

.crossword-cell input:focus {
    background: var(--yellow-100);
}

.crossword-cell input.correct {
    background: var(--pink-100);
    color: var(--pink-700);
}

.crossword-cell .cell-number {
    position: absolute;
    top: 2px;
    left: 3px;
    font-size: 0.6rem;
    color: var(--text-light);
    pointer-events: none;
    z-index: 1;
}

.crossword-cell.blocked {
    background: var(--pink-200);
}

.crossword-clues {
    max-width: 400px;
    width: 100%;
}

.clue-item {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    font-size: 0.9rem;
    color: var(--text-mid);
    background: white;
    transition: all 0.3s;
    cursor: pointer;
}

.clue-item:hover {
    background: var(--pink-50);
}

.clue-item.solved {
    background: var(--pink-100);
    color: var(--pink-700);
    text-decoration: line-through;
}

.clue-number {
    font-weight: 700;
    color: var(--pink-500);
    margin-right: 8px;
}

/* ── Memory Match ── */
.memory-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    max-width: 480px;
    width: 100%;
}

.memory-card {
    aspect-ratio: 3/4;
    perspective: 800px;
    cursor: pointer;
}

.memory-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s var(--ease-spring);
    transform-style: preserve-3d;
}

.memory-card.flipped .memory-card-inner {
    transform: rotateY(180deg);
}

.memory-card-front, .memory-card-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.memory-card-front {
    background: var(--gradient-warm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    border: 2px solid var(--pink-200);
}

.memory-card-back {
    transform: rotateY(180deg);
    background: white;
    border: 2px solid var(--pink-300);
}

.memory-card-back img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.memory-card.matched .memory-card-inner {
    transform: rotateY(180deg);
}

.memory-card.matched .memory-card-back {
    border-color: var(--yellow-400);
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.3);
}

/* ── Math Puzzle ── */
.math-question-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-card);
    max-width: 400px;
    width: 100%;
}

.math-expression {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 24px 0;
    letter-spacing: 0.05em;
}

.math-input {
    width: 120px;
    height: 56px;
    border: 3px solid var(--pink-200);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.math-input:focus {
    border-color: var(--pink-400);
    box-shadow: 0 0 0 4px rgba(244, 114, 182, 0.15);
}

.math-input.correct {
    border-color: #10b981;
    background: #ecfdf5;
}

.math-input.wrong {
    border-color: #ef4444;
    animation: shake 0.4s ease;
}

.digit-display {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 24px 0;
}

.digit-slot {
    width: 48px;
    height: 56px;
    border: 2px dashed var(--pink-200);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--pink-500);
    transition: all 0.4s var(--ease-spring);
}

.digit-slot.revealed {
    border-style: solid;
    border-color: var(--pink-400);
    background: var(--pink-50);
    transform: scale(1.1);
}

/* ── Cipher Puzzle ── */
.cipher-display {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    letter-spacing: 0.1em;
    line-height: 2;
    background: white;
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    max-width: 600px;
    width: 100%;
    text-align: center;
    word-wrap: break-word;
}

.cipher-letter {
    display: inline-block;
    padding: 2px 1px;
    transition: color 0.3s, transform 0.3s;
}

.cipher-letter.decoded {
    color: var(--pink-600);
    font-weight: 700;
}

.cipher-letter.space {
    width: 8px;
}

.cipher-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    max-width: 500px;
}

.cipher-key-btn {
    width: 40px;
    height: 40px;
    border: 2px solid var(--pink-200);
    border-radius: var(--radius-sm);
    background: white;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
}

.cipher-key-btn:hover {
    background: var(--pink-50);
    border-color: var(--pink-400);
}

.cipher-key-btn.used {
    background: var(--pink-100);
    border-color: var(--pink-400);
    color: var(--pink-700);
}

/* ── Love Note Reveal ── */
.love-note {
    background: linear-gradient(135deg, #FFF5F7, #FFFAF0);
    border: 2px solid var(--pink-200);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    max-width: 500px;
    width: 100%;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s var(--ease-smooth);
    position: relative;
    overflow: hidden;
}

.love-note::before {
    content: '💌';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
}

.love-note.visible {
    opacity: 1;
    transform: translateY(0);
}

.love-note-text {
    font-family: 'Caveat', cursive;
    font-size: 1.5rem;
    line-height: 1.6;
    color: var(--text-dark);
    margin-top: 16px;
}

/* ── Progress Heart (Hub) ── */
.progress-heart {
    width: 200px;
    height: 200px;
    margin: 0 auto 32px;
    position: relative;
}

.progress-heart svg {
    width: 100%;
    height: 100%;
}

/* ── Stats Bar ── */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: 24px;
    padding: 16px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--pink-500);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ── Modal / Overlay ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(31, 18, 24, 0.5);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: white;
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 480px;
    width: 100%;
    text-align: center;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.4s var(--ease-spring);
    box-shadow: var(--shadow-float);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

/* ── Animations ── */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

@keyframes pulse-soft {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

@keyframes pop-in {
    0% { transform: scale(0); opacity: 0; }
    70% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes slide-up {
    0% { transform: translateY(30px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

@keyframes typewriter {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes sparkle {
    0%, 100% { opacity: 0; transform: scale(0); }
    50% { opacity: 1; transform: scale(1); }
}

@keyframes heart-float {
    0% { transform: translateY(0) scale(1); opacity: 1; }
    100% { transform: translateY(-100vh) scale(0.5); opacity: 0; }
}

.anim-float { animation: float 6s ease-in-out infinite; }
.anim-pulse { animation: pulse-soft 2s ease-in-out infinite; }
.anim-pop   { animation: pop-in 0.5s var(--ease-spring) forwards; }
.anim-slide { animation: slide-up 0.6s var(--ease-smooth) forwards; }

/* ── Floating Particles ── */
.particles-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    font-size: 1.2rem;
    opacity: 0.3;
    animation: heart-float linear infinite;
}

/* ── Page Transition ── */
.page-transition-enter {
    opacity: 0;
    transform: translateY(20px);
}

.page-transition-active {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.5s var(--ease-smooth);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--pink-300);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--pink-400);
}

/* ── Hint Button ── */
.hint-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 2px dashed var(--yellow-400);
    border-radius: var(--radius-full);
    background: var(--yellow-50);
    color: var(--yellow-600);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Inter', sans-serif;
}

.hint-btn:hover {
    background: var(--yellow-100);
    border-color: var(--yellow-500);
}

/* ── Timer / Counter ── */
.game-timer {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-mid);
    padding: 8px 20px;
    background: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-soft);
}

.piece-counter {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

/* ── Dark Mode (for finale page) ── */
body.dark-mode {
    background: var(--dark-bg);
    color: var(--dark-text);
}

body.dark-mode h1, body.dark-mode h2, body.dark-mode h3 {
    color: var(--dark-text);
}

body.dark-mode .card {
    background: var(--dark-surface);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .page-container {
        padding: 16px;
    }

    .memory-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .crossword-cell {
        width: 36px;
        height: 36px;
    }

    .crossword-cell input {
        font-size: 0.95rem;
    }

    .math-expression {
        font-size: 2rem;
    }

    .love-note {
        padding: 24px 16px;
    }

    .love-note-text {
        font-size: 1.3rem;
    }

    .piece-tray {
        gap: 6px;
        padding: 12px;
    }
}

@media (max-width: 480px) {
    .page-container {
        padding: 12px;
    }

    .crossword-cell {
        width: 30px;
        height: 30px;
    }

    .crossword-cell input {
        font-size: 0.8rem;
    }

    .cipher-display {
        font-size: 0.9rem;
        padding: 16px;
    }

    .stats-bar {
        gap: 16px;
    }
}

/* ── Completion Celebration ── */
.completion-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(255, 248, 240, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.8s;
}

.completion-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* ── Utility Classes ── */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.w-full { width: 100%; }
.hidden { display: none !important; }