/* CSS Variables for consistent theming */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-color: #333;
    --light-text: #f8f9fa;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Theme system is handled via JavaScript data-theme attribute */
/* Default light theme variables are already defined in :root */

/* Mobile Navigation Theme Support */
[data-theme="dark"] .nav-menu {
    background: #1a1a1f;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .nav-menu a {
    color: #e9ecef;
    text-shadow: none;
}

[data-theme="dark"] .nav-menu a:hover {
    color: var(--primary-color);
    background: rgba(127, 83, 255, 0.1);
}

[data-theme="dark"] .hamburger .bar {
    background: #e9ecef;
}

[data-theme="dark"] .nav-menu.active {
    left: 0;
    background: #1a1a1f;
    border-top: 1px solid #2d2d3a;
}

/* Additional dark theme styles for form elements */
[data-theme="dark"] .airtable-form-container {
    background: #1a1a1f;
    border-color: #2d2d3a;
}

[data-theme="dark"] .info-box {
    background: #1a1a1f;
    border-color: #2d2d3a;
}

[data-theme="dark"] .submit-info {
    background: transparent;
}

[data-theme="dark"] .submit-container {
    background: transparent;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2.5rem;
    color: var(--text-color);
}

h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.85));
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.15), 0 2px 10px rgba(118, 75, 162, 0.1);
    border-bottom: 1px solid rgba(102, 126, 234, 0.15);
    transition: var(--transition);
    border-radius: 0 0 20px 20px;
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    opacity: 0;
    transition: var(--transition);
}

.navbar:hover {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.95));
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.25), 0 4px 20px rgba(118, 75, 162, 0.15);
}

.navbar:hover::before {
    opacity: 1;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.nav-container::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.3), transparent);
    opacity: 0;
    transition: var(--transition);
}

.navbar:hover .nav-container::after {
    opacity: 1;
}

.nav-logo h1 {
    font-size: 1.8rem;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo span {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #2d3748;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.3);
}

.nav-menu a:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
    text-align: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
    max-width: 1200px;
    width: 100%;
    padding: 0 20px;
}

.hero-text {
    text-align: left;
}

.hero-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    justify-content: center;
}

.hero-text h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.hero-text p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--text-color);
    max-width: 600px;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--box-shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.hero-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    opacity: 0.1;
    z-index: 1;
}

.floating-shapes {
    position: relative;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 200px;
    height: 200px;
    background: var(--primary-color);
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    background: var(--secondary-color);
    top: 60%;
    left: 10%;
    animation-delay: 1s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    background: var(--accent-color);
    top: 40%;
    right: 20%;
    animation-delay: 2s;
}

.shape-4 {
    width: 120px;
    height: 120px;
    background: var(--primary-color);
    bottom: 20%;
    right: 30%;
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* Section Styles */
section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.2rem;
    color: #666;
}

/* About Section */
.about {
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.1), transparent);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.about-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.about-card h3 {
    margin-bottom: 1rem;
}

/* Categories Section */
.categories {
    background: linear-gradient(180deg, transparent, rgba(118, 75, 162, 0.1));
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.category-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.category-card h3 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.category-card ul {
    list-style: none;
    margin-bottom: 2rem;
    text-align: center;
}

.category-card li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    position: relative;
    padding: 0.5rem 0;
    text-align: center;
}

.category-card li::before {
    display: none;
}

.reward-badge {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    text-align: center;
    font-size: 0.9rem;
}

/* Submit Section */
.submit {
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
}

.submit-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.airtable-form-container {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(0, 0, 0, 0.1);
    position: relative;
    min-height: 600px;
}

.airtable-embed-wrapper {
    width: 100%;
    height: 100%;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.airtable-embed {
    width: 100%;
    height: 600px;
    border: none;
    border-radius: 12px;
    box-shadow: var(--box-shadow);
    transition: all 0.3s ease;
    min-height: 500px;
}

.airtable-embed:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
}

/* Responsive styles for Airtable embed */
@media (max-width: 768px) {
    .airtable-embed {
        height: 700px;
        min-height: 600px;
    }
}

@media (max-width: 480px) {
    .airtable-embed {
        height: 800px;
        min-height: 700px;
    }
}

.info-box {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Multi-Step Form Styles */
.form-step {
    display: none;
    animation: fadeInUp 0.4s ease-out;
}

.form-step.active {
    display: block;
}

.step-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid rgba(102, 126, 234, 0.2);
}

.step-header h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.step-header p {
    color: #666;
    font-size: 1rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    margin-top: 2rem;
}

/* Progress indicator */
.progress-indicator {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.progress-step {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    color: #64748b;
    position: relative;
    transition: var(--transition);
}

.progress-step.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.progress-step.completed {
    background: #10b981;
    color: white;
}

.progress-step::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 100%;
    width: 40px;
    height: 2px;
    background: #e2e8f0;
    transform: translateY(-50%);
}

.progress-step:last-child::after {
    display: none;
}

.progress-step.completed::after {
    background: #10b981;
}

.progress-step.active::after {
    background: var(--primary-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--card-bg);
    color: var(--text-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Custom Select Styling */
.custom-select {
    position: relative;
    width: 100%;
}

.custom-select select {
    width: 100%;
    padding: 1rem;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--card-bg);
    color: var(--text-color);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
    padding-right: 3rem;
}

.custom-select select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.select-arrow {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--primary-color);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.custom-select:hover .select-arrow {
    color: var(--secondary-color);
}

.custom-select select:hover {
    border-color: var(--primary-color);
}

/* Dark theme custom select styles */
[data-theme="dark"] .custom-select select {
    background: #23232a;
    border-color: #2d2d3a;
    color: #e9ecef;
}

[data-theme="dark"] .custom-select select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(127, 83, 255, 0.3);
}

[data-theme="dark"] .select-arrow {
    color: var(--primary-color);
}

[data-theme="dark"] .custom-select:hover .select-arrow {
    color: var(--secondary-color);
}

.radio-group {
    display: flex;
    gap: 2rem;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.submit-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-box {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

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

.info-box ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.info-box li {
    margin-bottom: 0.5rem;
}

/* Leaderboard Section */
.leaderboard {
    background: linear-gradient(180deg, rgba(118, 75, 162, 0.15), transparent);
    position: relative;
}

.leaderboard::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.leaderboard-container {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 2px solid rgba(102, 126, 234, 0.2);
    overflow-x: auto;
    backdrop-filter: blur(10px);
}

.leaderboard-header {
    display: grid;
    grid-template-columns: 100px 2fr 1fr 1fr;
    gap: 1rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-radius: 8px;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.leaderboard-body {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.leaderboard-row {
    display: grid;
    grid-template-columns: 100px 2fr 1fr 1fr;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    align-items: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.leaderboard-row:hover {
    transform: translateX(8px) translateY(-2px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
}

.leaderboard-row:nth-child(odd) {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 1));
}

.leaderboard-row.top-row {
    background: linear-gradient(135deg, #fff7e6, #fff0e0);
    border: 3px solid #ffd580;
    box-shadow: 0 15px 40px rgba(255, 213, 128, 0.3);
    position: relative;
}

.leaderboard-row.top-row::before {
    content: '🏆';
    position: absolute;
    top: -10px;
    right: 20px;
    font-size: 2rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.rank {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
    text-shadow: 0 2px 4px rgba(102, 126, 234, 0.3);
}

.name {
    font-weight: 700;
    font-size: 1.1rem;
    color: #333;
    position: relative;
}

.name::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: var(--transition);
}

.leaderboard-row:hover .name::after {
    width: 100%;
}

.contributions {
    color: #4a5568;
    font-weight: 600;
    font-size: 1.1rem;
    background: rgba(102, 126, 234, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.earnings {
    color: #2d3748;
    font-weight: 800;
    font-size: 1.2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 4px rgba(102, 126, 234, 0.2);
}

/* FAQ Section */
.faq {
    background: linear-gradient(180deg, transparent, rgba(102, 126, 234, 0.1));
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(102, 126, 234, 0.05);
}

.faq-question i {
    transition: var(--transition);
    color: var(--primary-color);
}

.faq-question[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: #666;
}

.faq-answer p {
    padding-bottom: 1.5rem;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: #fff;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3, .footer-section h4 {
    color: white;
    margin-bottom: 1.5rem;
}

.footer-section p {
    color: #ccc;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--primary-color);
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: #333;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #333;
    color: #666;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .submit-container {
        grid-template-columns: 1fr;
    }
    
    .leaderboard-header,
    .leaderboard-row {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .rank-header, .name-header, .contributions-header, .earnings-header {
        display: none;
    }
    
    .faq-question {
        padding: 1rem;
    }
    
    h2 {
        font-size: 2rem;
    }
}

/* Animation for mobile menu */
.nav-menu.active {
    left: 0;
}

/* Scroll animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Loading animation for buttons */
.btn-loading {
    position: relative;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-top: -10px;
    margin-left: -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}