styles.css

/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    --primary-color: #20B2AA;
    --primary-dark: #189A94;
    --secondary-color: #10b981;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --error: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    max-width: 100vw;
}

#app {
    max-width: 100vw;
    overflow-x: hidden;
}

/* ===========================
   Container & Layout
   =========================== */
.container {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

.content {
    flex: 1;
    margin: 1.5rem 0;
    max-width: 100%;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

/* ===========================
   Typography
   =========================== */
h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 0.5rem;
    text-align: center;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0.5rem 0 1rem;
    text-align: center;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1rem 0 0.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.intro-text {
    font-size: 1.1rem;
    font-weight: 500;
    color: #1e40af;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.skills-list {
    list-style: none;
    margin-left: 0;
}

.skills-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.75rem;
}

ul, ol {
    margin: 1rem 0 1rem 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

/* ===========================
   Pages & Navigation
   =========================== */
.page {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    position: relative;
}

.page.active {
    display: block;
    opacity: 1;
}

.page-logo-header {
    text-align: center;
    margin-bottom: 1rem;
    padding-top: 1rem;
}

.page-logo-footer {
    text-align: center;
    margin-top: 2rem;
    padding: 1.5rem 0;
    border-top: 1px solid #e5e7eb;
}

.page-logo {
    height: 2.5rem;
    cursor: pointer;
    animation: logoShake 2s ease-in-out infinite;
    transform-origin: center;
}

.page-logo.shake-intense {
    animation: logoShakeIntense 0.3s ease-in-out infinite;
}

.page-logo.flipping {
    animation: logoFlipWithShake 4s ease-in-out forwards;
}

.username-footer {
    margin-top: 2rem;
    font-size: 0.75rem;
    color: #94a3b8;
    text-align: center;
    padding: 0.25rem 0.75rem;
    background: rgba(148, 163, 184, 0.1);
    border-radius: 12px;
    font-weight: 500;
}

/* ===========================
   Buttons
   =========================== */
.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    max-width: 300px;
    display: block;
    margin: 2rem auto 0;
    transition: background 0.2s;
    box-shadow: 0 4px 6px var(--shadow);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px var(--shadow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-finish {
    background: #f59e0b;
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    max-width: 300px;
    display: block;
    margin: 0 auto;
    transition: background 0.2s;
    box-shadow: 0 4px 6px var(--shadow);
}

.btn-finish:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px var(--shadow);
}

.btn-finish:active {
    transform: translateY(0);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

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

/* ===========================
   Floating Help Button
   =========================== */
.floating-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 999;
    display: none;
    transition: transform 0.2s, box-shadow 0.2s;
    padding: 0;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.floating-btn.visible {
    display: flex;
}

.floating-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px var(--shadow);
}

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

/* ===========================
   Info Boxes
   =========================== */
.info-box {
    background: #eff6ff;
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.5rem;
    border-radius: 4px;
    margin: 1rem 0;
}

.highlight {
    background: #fef3c7;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    border-left: 4px solid var(--warning);
}

/* ===========================
   Back to Previous Study Button
   =========================== */
.back-to-previous-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    border: none;
    color: #64748b;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    border-radius: 6px;
}

.back-to-previous-btn:hover {
    background: rgba(100, 116, 139, 0.1);
    color: var(--primary-color);
}

.back-to-previous-btn svg {
    transition: transform 0.2s;
}

.back-to-previous-btn:hover svg {
    transform: translateX(-3px);
}

.back-to-previous-btn:active {
    transform: scale(0.98);
}

/* ===========================
   Paper Card
   =========================== */
.paper-card {
    background: var(--surface);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1rem 0;
    box-shadow: 0 2px 8px var(--shadow);
    max-width: 100%;
    box-sizing: border-box;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.paper-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border);
}

.paper-id {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.paper-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0.5rem 0;
    text-align: left;
}

.paper-section {
    margin: 1.5rem 0;
}

.paper-section h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.paper-section p {
    color: var(--text-primary);
}

/* ===========================
   Rating Scale
   =========================== */
.rating-section {
    background: #f1f5f9;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.rating-section h3 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.rating-scale {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
    margin: 1rem 0;
    flex-wrap: wrap;
}

.rating-option {
    flex: 1;
    min-width: 60px;
}

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

.rating-option label {
    display: block;
    background: white;
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 1rem 0.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
}

/* Color all rating boxes with their scale colors */
.rating-option label[for$="-1"] { background: #fee2e2; border-color: #ef4444; color: #991b1b; }
.rating-option label[for$="-2"] { background: #fed7aa; border-color: #fb923c; color: #9a3412; }
.rating-option label[for$="-3"] { background: #fef3c7; border-color: #facc15; color: #854d0e; }
.rating-option label[for$="-4"] { background: #fef9c3; border-color: #fde047; color: #713f12; }
.rating-option label[for$="-5"] { background: #d9f99d; border-color: #84cc16; color: #365314; }
.rating-option label[for$="-6"] { background: #bbf7d0; border-color: #22c55e; color: #14532d; }
.rating-option label[for$="-7"] { background: #a7f3d0; border-color: #10b981; color: #064e3b; }

.rating-option label:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.rating-option input[type="radio"]:checked + label {
    transform: scale(1.05);
}

/* Color scale for rating options when checked - full saturation */
.rating-option input[type="radio"]:checked + label[for$="-1"] { background: #ef4444; border-color: #ef4444; color: white; }
.rating-option input[type="radio"]:checked + label[for$="-2"] { background: #fb923c; border-color: #fb923c; color: white; }
.rating-option input[type="radio"]:checked + label[for$="-3"] { background: #facc15; border-color: #facc15; color: #1f2937; }
.rating-option input[type="radio"]:checked + label[for$="-4"] { background: #fde047; border-color: #fde047; color: #1f2937; }
.rating-option input[type="radio"]:checked + label[for$="-5"] { background: #84cc16; border-color: #84cc16; color: white; }
.rating-option input[type="radio"]:checked + label[for$="-6"] { background: #22c55e; border-color: #22c55e; color: white; }
.rating-option input[type="radio"]:checked + label[for$="-7"] { background: #10b981; border-color: #10b981; color: white; }

.rating-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}

.submit-rating {
    background: var(--success);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    margin-top: 1rem;
    transition: background 0.2s;
}

.submit-rating:hover {
    background: #059669;
}

.submit-rating:disabled {
    background: #cbd5e1;
    cursor: not-allowed;
}

/* ===========================
   Results Display
   =========================== */
.results-box {
    background: white;
    border: 2px solid var(--success);
    border-radius: 12px;
    padding: 0.75rem 1.5rem 1.5rem;
    margin: 0 0 1rem 0;
    text-align: center;
}

.results-box h3 {
    color: var(--success);
    margin-bottom: 1rem;
}

.rating-comparison {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.rating-scale-grid {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
}

.scale-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.scale-row {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.25rem;
}

.scale-cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: #e2e8f0;
    font-size: 0.75rem;
    font-weight: 600;
    color: #94a3b8;
    transition: all 0.2s ease;
}

.scale-cell.active {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transform: scale(1.1);
}

/* Color scale from blue (low) to red (high) - only applied to active cells */
.scale-cell.active.rating-1 { background: #3b82f6; }
.scale-cell.active.rating-2 { background: #06b6d4; }
.scale-cell.active.rating-3 { background: #10b981; }
.scale-cell.active.rating-4 { background: #84cc16; }
.scale-cell.active.rating-5 { background: #facc15; }
.scale-cell.active.rating-6 { background: #fb923c; }
.scale-cell.active.rating-7 { background: #ef4444; }

.rating-display {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
}

.rating-display .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.rating-display .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.participant-count {
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===========================
   Modal
   =========================== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}

.modal.active {
    display: block;
}

.modal-content {
    background: white;
    margin: 2rem auto;
    padding: 2rem;
    max-width: 800px;
    border-radius: 12px;
    position: relative;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.close {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.close:hover {
    color: var(--text-primary);
}

.modal-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border);
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ===========================
   Glossary & Rubric
   =========================== */
.glossary-item {
    margin-bottom: 1.5rem;
}

.glossary-term {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.glossary-definition {
    margin-top: 0.25rem;
    color: var(--text-primary);
}

.rubric-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.9rem;
}

.rubric-table th {
    background: var(--primary-color);
    color: white;
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
}

.rubric-table td {
    padding: 0.75rem;
    border: 1px solid var(--border);
    vertical-align: top;
}

.rubric-table tr:nth-child(even) {
    background: #f8fafc;
}

/* ===========================
   Loading Spinner
   =========================== */
.spinner {
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes scoreUpdate {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

/* ===========================
   Gamification Elements
   =========================== */
.score-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: clamp(0.5rem, 1.5vh, 0.75rem) 1rem;
    min-height: 2.5rem;
    max-height: 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 998;
    box-shadow: 0 2px 8px var(--shadow);
    font-weight: 600;
}

#total-score-header {
    background: rgba(255, 255, 255, 0.25);
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.9rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    min-width: 80px;
}

.navbar-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
}

.navbar-logo {
    height: 2.5rem;
    width: 2.5rem;
    cursor: pointer;
    animation: logoShake 2s ease-in-out infinite;
    transform-origin: center;
    background: white;
    border-radius: 50%;
    padding: 0.4rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.navbar-logo.shake-intense {
    animation: logoShakeIntense 0.3s ease-in-out infinite;
}

.navbar-logo.flipping {
    animation: logoFlipWithShake 4s ease-in-out forwards;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-username {
    font-size: 0.85rem;
    opacity: 0.9;
    font-weight: 500;
    display: none; /* Hidden by default, shown only on results page */
}

.navbar-paper-number {
    font-size: 0.85rem;
    opacity: 0.9;
    font-weight: 500;
}

.medal-icon {
    font-size: 1rem;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.score-banner + .page {
    margin-top: clamp(3rem, 10vh, 5rem);
}

#page-welcome {
    margin-top: 0 !important;
}

#page-welcome .container {
    padding-top: 2rem;
    min-height: auto;
}

#page-welcome h1 {
    margin-top: 0;
    padding-top: 0;
    margin-bottom: 0.15rem;
    font-size: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    line-height: 1;
}

.logo-text {
    background: linear-gradient(135deg, #20B2AA 0%, #48d1cc 30%, #ff9a56 70%, #ff6b35 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    letter-spacing: -0.02em;
}

#page-welcome h2 {
    margin-bottom: 0.5rem;
}

/* Logo animations */
#logo-icon {
    animation: logoShake 2s ease-in-out infinite;
    transform-origin: center;
    position: relative;
    z-index: 1;
    margin-bottom: 0.3rem;
}

#logo-icon.shake-intense {
    animation: logoShakeIntense 0.3s ease-in-out infinite;
}

@keyframes logoShake {
    0% { transform: rotate(0deg); }
    12.5% { transform: rotate(-4deg); }
    25% { transform: rotate(-8deg); }
    37.5% { transform: rotate(-4deg); }
    50% { transform: rotate(0deg); }
    62.5% { transform: rotate(4deg); }
    75% { transform: rotate(8deg); }
    87.5% { transform: rotate(4deg); }
    100% { transform: rotate(0deg); }
}

@keyframes logoShakeIntense {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-15deg); }
    75% { transform: rotate(15deg); }
}

#logo-icon.flipping {
    animation: logoFlipWithShake 4s ease-in-out forwards;
}

@keyframes logoFlipWithShake {
    0% { transform: rotate(0deg); }
    2% { transform: rotate(-15deg); }
    4% { transform: rotate(15deg); }
    6% { transform: rotate(-12deg); }
    8% { transform: rotate(12deg); }
    10% { transform: rotate(-8deg); }
    12% { transform: rotate(8deg); }
    15% { transform: rotate(180deg); }
    85% { transform: rotate(180deg); }
    100% { transform: rotate(360deg); }
}

.droplet-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.droplet {
    position: absolute;
    background: radial-gradient(ellipse at 50% 30%, #ffaa33 0%, #ff8c42 40%, #ff6b35 70%, #cc5528 100%);
    border-radius: 50%;
    opacity: 0;
    box-shadow: 
        0 2px 6px rgba(255, 107, 53, 0.5),
        0 4px 12px rgba(255, 107, 53, 0.3),
        inset 0 -2px 4px rgba(0, 0, 0, 0.2),
        inset 0 2px 4px rgba(255, 200, 100, 0.3);
    animation: dropletDrop 3s cubic-bezier(0.4, 0, 0.6, 1) forwards;
}

@keyframes dropletDrop {
    0% {
        opacity: 0;
        transform: translateY(0) scale(0.5);
    }
    5% {
        opacity: 0.9;
        transform: translateY(10px) scale(1);
    }
    15% {
        transform: translateY(30px) scale(2);
    }
    40% {
        transform: translateY(50vh) scale(4);
    }
    70% {
        transform: translateY(80vh) scale(6);
    }
    100% {
        opacity: 0.3;
        transform: translateY(120vh) scale(8);
    }
}

/* Varied drop types */
.droplet-star {
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 50%, #ffaa00 100%);
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
    border-radius: 0;
    box-shadow: 
        0 0 10px rgba(255, 215, 0, 0.8),
        0 0 20px rgba(255, 215, 0, 0.5),
        0 2px 6px rgba(255, 170, 0, 0.5);
}

.droplet-heart {
    background: linear-gradient(135deg, #ff69b4 0%, #ff1493 50%, #c71585 100%);
    border-radius: 0;
    box-shadow: 
        0 0 8px rgba(255, 105, 180, 0.6),
        0 2px 6px rgba(255, 20, 147, 0.4);
}

.droplet-heart::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: inherit;
    border-radius: 50% 50% 0 0;
    transform: rotate(-45deg);
    transform-origin: 0 100%;
}

.droplet-heart::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: inherit;
    border-radius: 50% 50% 0 0;
    transform: rotate(45deg);
    transform-origin: 100% 100%;
}

.droplet-sparkle {
    background: radial-gradient(circle, #ffffff 0%, #add8e6 40%, #4bb3e3 100%);
    border-radius: 50%;
    box-shadow: 
        0 0 15px rgba(255, 255, 255, 1),
        0 0 30px rgba(173, 216, 230, 0.8),
        0 0 45px rgba(75, 179, 227, 0.6);
}

.droplet-bubble {
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.9) 0%, rgba(173, 216, 230, 0.6) 50%, rgba(135, 206, 235, 0.3) 100%);
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    box-shadow: 
        inset 0 -10px 20px rgba(135, 206, 235, 0.3),
        inset 0 10px 20px rgba(255, 255, 255, 0.5),
        0 0 10px rgba(173, 216, 230, 0.4);
}

.droplet-celebration {
    background: linear-gradient(135deg, 
        #ff0000 0%, #ff7f00 14%, #ffff00 28%, 
        #00ff00 42%, #0000ff 57%, #4b0082 71%, 
        #9400d3 85%, #ff0000 100%);
    border-radius: 50%;
    box-shadow: 
        0 0 15px rgba(255, 215, 0, 0.8),
        0 0 30px rgba(255, 215, 0, 0.6),
        0 0 45px rgba(255, 215, 0, 0.4),
        0 4px 10px rgba(255, 215, 0, 0.4);
    animation: dropletCelebrate 1.5s cubic-bezier(0.25, 0.1, 0.25, 1) forwards, rainbow-rotate 1s linear infinite;
}

/* Celebration refill drops - same styling but no main animation */
.droplet-celebration-refill {
    background: linear-gradient(135deg, 
        #ff0000 0%, #ff7f00 14%, #ffff00 28%, 
        #00ff00 42%, #0000ff 57%, #4b0082 71%, 
        #9400d3 85%, #ff0000 100%);
    border-radius: 50%;
    box-shadow: 
        0 0 12px rgba(255, 215, 0, 0.7),
        0 0 24px rgba(255, 215, 0, 0.5),
        0 0 36px rgba(255, 215, 0, 0.3);
    animation: rainbow-rotate 1s linear infinite;
}

@keyframes dropletCelebrate {
    0% {
        opacity: 0;
        transform: translateY(0) scale(0.3) rotate(0deg);
    }
    10% {
        opacity: 1;
        transform: translateY(15px) scale(0.7) rotate(45deg);
    }
    25% {
        transform: translateY(35vh) scale(1.2) rotate(135deg);
    }
    55% {
        transform: translateY(60vh) scale(1.8) rotate(270deg);
    }
    85% {
        transform: translateY(85vh) scale(2.3) rotate(405deg);
    }
    100% {
        opacity: 0.2;
        transform: translateY(120vh) scale(2.5) rotate(540deg);
    }
}

@keyframes rainbow-rotate {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

/* Refill animation - drops rain from top and shrink rapidly as they enter logo */
@keyframes dropletRefill {
    0% {
        opacity: 0;
        transform: translateY(0) scale(2.5);
    }
    8% {
        opacity: 0.95;
        transform: translateY(calc(var(--travel-distance) * 0.15)) scale(2);
    }
    25% {
        opacity: 1;
        transform: translateY(calc(var(--travel-distance) * 0.4)) scale(1.2);
    }
    50% {
        opacity: 0.9;
        transform: translateY(calc(var(--travel-distance) * 0.65)) scale(0.6);
    }
    75% {
        opacity: 0.6;
        transform: translateY(calc(var(--travel-distance) * 0.85)) scale(0.25);
    }
    90% {
        opacity: 0.3;
        transform: translateY(calc(var(--travel-distance) * 0.95)) scale(0.1);
    }
    100% {
        opacity: 0;
        transform: translateY(var(--travel-distance)) scale(0.05);
    }
}

.droplet-refill {
    animation: dropletRefill 1.1s cubic-bezier(0.25, 0, 0.1, 1) forwards;
}

.session-timer {
    font-size: 0.85rem;
    opacity: 0.9;
    padding: 0.2rem 0.5rem;
    background: rgba(255,255,255,0.2);
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    transition: color 0.3s ease;
    min-width: 80px;
    text-align: center;
}

.participant-count {
    font-size: 0.85rem;
    opacity: 0.9;
}

.score-banner .participant-count {
    padding: 0.2rem 0.5rem;
    background: rgba(255,255,255,0.2);
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    min-width: 80px;
    text-align: center;
}

.score-earned {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    margin: 1rem 0;
}

.score-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.score-message {
    font-size: 1.1rem;
    color: white;
    margin-top: 0.5rem;
    font-weight: 600;
}

.final-score-card {
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    color: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    margin: 2rem 0;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.final-score-card h2 {
    color: white;
    margin-bottom: 1rem;
}

.final-score {
    font-size: 4rem;
    font-weight: 700;
    margin: 1rem 0;
    text-shadow: 3px 3px 6px rgba(0,0,0,0.3);
}

.score-rank {
    font-size: 1.2rem;
    opacity: 0.95;
    margin-top: 0.5rem;
}

.leaderboard {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2rem 0;
    box-shadow: 0 2px 8px var(--shadow);
}

.leaderboard h3 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.leaderboard-entry {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    margin: 0.5rem 0;
    background: #f8fafc;
    border-radius: 8px;
    border-left: 4px solid var(--border);
}

.leaderboard-entry.current-user {
    background: #eff6ff;
    border-left-color: var(--primary-color);
    font-weight: 600;
}

.leaderboard-entry .rank {
    font-size: 1.5rem;
    text-align: center;
    color: var(--text-primary);
}

.leaderboard-entry .username-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    overflow: hidden;
    min-width: 0;
}

.leaderboard-entry .username {
    color: var(--text-primary);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex-shrink: 1;
    min-width: 0;
}

.leaderboard-entry .score {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.you-badge {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.25rem;
    }
    
    .container {
        padding: 1rem;
    }
    
    /* Reduce padding on colored section boxes (Part 1, Part 2) */
    div[style*="linear-gradient"] {
        padding: 1.25rem !important;
    }
    
    /* Leaderboard mobile adjustments */
    .leaderboard {
        padding: 1rem;
    }
    
    .leaderboard-entry {
        grid-template-columns: 50px 1fr auto;
        gap: 0.5rem;
        padding: 0.75rem 0.5rem;
    }
    
    .leaderboard-entry .rank {
        font-size: 1.25rem;
    }
    
    .leaderboard-entry .username {
        font-size: 0.9rem;
    }
    
    .leaderboard-entry .score {
        font-size: 1.1rem;
    }
    
    .you-badge {
        padding: 0.2rem 0.5rem;
        font-size: 0.75rem;
    }
    
    .score-banner + .page {
        margin-top: clamp(3.5rem, 12vh, 5.5rem);
    }
    
    .rating-scale {
        gap: 0.25rem;
    }
    
    .rating-option label {
        padding: 0.75rem 0.25rem;
        font-size: 0.9rem;
    }
    
    .floating-btn {
        width: 50px;
        height: 50px;
        bottom: 1rem;
        right: 1rem;
        font-size: 1.7rem;
    }
    
    .modal-content {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .rubric-table {
        font-size: 0.75rem;
    }
    
    .rubric-table th,
    .rubric-table td {
        padding: 0.4rem;
        font-size: 0.75rem;
    }
    
    .rating-comparison {
        grid-template-columns: 1fr;
    }
    
    .rating-scale-grid {
        padding: 0.75rem;
    }
    
    .scale-row {
        gap: 0.2rem;
    }
    
    .scale-cell {
        font-size: 0.7rem;
    }
    
    .scale-cell.active {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }
    
    .btn-primary {
        font-size: 1rem;
        padding: 0.875rem 1.5rem;
    }
    
    /* Further reduce padding on colored section boxes */
    div[style*="linear-gradient"] {
        padding: 1rem !important;
    }
    
    /* Leaderboard mobile adjustments */
    .leaderboard {
        padding: 0.75rem;
    }
    
    .leaderboard-entry {
        grid-template-columns: 40px 1fr auto;
        gap: 0.4rem;
        padding: 0.6rem 0.4rem;
    }
    
    .leaderboard-entry .rank {
        font-size: 1.1rem;
    }
    
    .leaderboard-entry .username {
        font-size: 0.85rem;
    }
    
    .leaderboard-entry .score {
        font-size: 1rem;
    }
    
    .you-badge {
        padding: 0.15rem 0.4rem;
        font-size: 0.7rem;
    }
    
    .rating-option {
        min-width: 40px;
    }
    
    .rating-option label {
        padding: 0.6rem 0.15rem;
        font-size: 0.85rem;
    }
    
    .rating-scale-grid {
        padding: 0.5rem;
    }
    
    .scale-row {
        gap: 0.15rem;
    }
    
    .scale-cell {
        font-size: 0.65rem;
    }
    
    .scale-cell.active {
        font-size: 1rem;
        transform: scale(1.05);
    }
}

@media (max-width: 400px) {
    .rating-scale {
        gap: 0.15rem;
    }
    
    .rating-option {
        min-width: 35px;
    }
    
    .rating-option label {
        padding: 0.5rem 0.1rem;
        font-size: 0.8rem;
    }
    
    .rating-scale-grid {
        padding: 0.4rem;
    }
    
    .scale-row {
        gap: 0.1rem;
    }
    
    .scale-label {
        font-size: 0.8rem;
        margin-bottom: 0.5rem;
    }
}

@media (max-width: 360px) {
    .rating-scale {
        gap: 0.1rem;
    }
    
    .rating-option {
        min-width: 30px;
    }
    
    .rating-option label {
        padding: 0.4rem 0.05rem;
        font-size: 0.75rem;
    }
    
    .scale-row {
        gap: 0.05rem;
    }
    
    .scale-cell {
        font-size: 0.6rem;
        border-radius: 4px;
    }
    
    .scale-cell.active {
        font-size: 0.9rem;
    }
    
    /* Minimal padding on colored section boxes for very small screens */
    div[style*="linear-gradient"] {
        padding: 0.75rem !important;
    }
    
    /* Extra small screens - further reduce leaderboard */
    .leaderboard {
        padding: 0.5rem;
    }
    
    .leaderboard-entry {
        grid-template-columns: 35px 1fr auto;
        gap: 0.3rem;
        padding: 0.5rem 0.3rem;
    }
    
    .leaderboard-entry .rank {
        font-size: 1rem;
    }
    
    .leaderboard-entry .username {
        font-size: 0.8rem;
    }
    
    .leaderboard-entry .score {
        font-size: 0.95rem;
    }
}

/* ===== Token Allocator ===== */
.criterion-token-row {
    margin-bottom: 1.25rem;
}

.criterion-token-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.4rem;
}

.criterion-token-label span:first-child {
    font-weight: 600;
    font-size: 0.95rem;
    color: #374151;
}

.token-count-badge {
    background: #667eea;
    color: white;
    border-radius: 12px;
    padding: 2px 10px;
    font-size: 0.85rem;
    font-weight: 700;
    min-width: 32px;
    text-align: center;
    transition: background 0.2s;
}

.token-count-badge.complete {
    background: #059669;
}

.token-boxes {
    display: grid;
    grid-template-columns: repeat(20, 1fr);
    gap: 3px;
}

.token-box {
    aspect-ratio: 1;
    border: 2px solid #d1d5db;
    border-radius: 3px;
    background: white;
    cursor: pointer;
    transition: background 0.1s, border-color 0.1s, opacity 0.1s;
    min-width: 0;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.token-box:hover:not(.disabled) {
    border-color: #667eea;
    background: #e0e7ff;
}

.token-box.filled {
    background: #667eea;
    border-color: #5b21b6;
}

.token-box.filled:hover:not(.disabled) {
    background: #4f46e5;
    border-color: #4338ca;
}

.token-box.hover-fill:not(.filled):not(.disabled) {
    background: #c7d2fe;
    border-color: #818cf8;
}

.token-box.disabled {
    cursor: not-allowed;
    opacity: 0.25;
}

@media (max-width: 480px) {
    .token-boxes {
        gap: 2px;
    }
}

@media (max-width: 360px) {
    .token-boxes {
        gap: 1px;
    }
    .token-box {
        border-width: 1px;
        border-radius: 2px;
    }
}