/* CSS Variables */
:root {
    --tennis-green: #2d5a27;
    --tennis-green-dark: #1e3d1a;
    --tennis-green-light: #4a8c3f;
    --court-green: #3d7a35;
    --tennis-yellow: #ccff00;
    --tennis-yellow-dark: #a8d600;
    --white: #ffffff;
    --off-white: #f8faf7;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--off-white);
}

/* Container */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(30, 61, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
    padding: 16px 24px;
    box-shadow: var(--shadow-md);
}

.navbar-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    color: var(--white);
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.navbar-cta {
    background: var(--tennis-yellow);
    color: var(--tennis-green-dark);
    padding: 10px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.navbar-cta:hover {
    background: var(--tennis-yellow-dark);
    transform: translateY(-1px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--tennis-green) 0%, var(--tennis-green-dark) 100%);
    color: var(--white);
    padding: 140px 24px 100px;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        linear-gradient(90deg, transparent 49.5%, rgba(255,255,255,0.1) 49.5%, rgba(255,255,255,0.1) 50.5%, transparent 50.5%),
        linear-gradient(0deg, transparent 49.5%, rgba(255,255,255,0.1) 49.5%, rgba(255,255,255,0.1) 50.5%, transparent 50.5%);
    background-size: 100% 100%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.registration-badge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 16px 32px;
    border-radius: var(--radius-xl);
    margin-bottom: 32px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.counter {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1;
    color: var(--tennis-yellow);
}

.counter-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.9;
    margin-top: 4px;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.event-meta {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 8px;
}

.tagline-headline {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--tennis-yellow);
    margin-bottom: 16px;
}

.tagline {
    font-size: 1.0625rem;
    font-weight: 400;
    color: var(--white);
    margin-bottom: 40px;
    line-height: 1.7;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background: var(--tennis-yellow);
    color: var(--tennis-green-dark);
    padding: 18px 48px;
    font-size: 1.125rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-lg);
}

.cta-button:hover {
    background: var(--tennis-yellow-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.hero-decoration {
    position: absolute;
    right: -50px;
    bottom: -50px;
    opacity: 0.1;
}

.tennis-ball {
    width: 200px;
    height: 200px;
    background: var(--white);
    border-radius: 50%;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--tennis-green-dark);
}

.section-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 48px;
}

/* Prize Table */
.prizes {
    background: var(--white);
}

.prize-table-wrapper {
    overflow-x: auto;
}

.prize-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.prize-table th,
.prize-table td {
    padding: 20px 24px;
    text-align: left;
}

.prize-table thead {
    background: var(--tennis-green);
    color: var(--white);
}

.prize-table th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.prize-table tbody tr {
    border-bottom: 1px solid var(--gray-200);
    transition: background 0.2s ease;
}

.prize-table tbody tr:hover {
    background: var(--gray-100);
}

.prize-table tbody tr:last-child {
    border-bottom: none;
}

.prize-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--tennis-green);
}

.status-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--gray-200);
    color: var(--gray-600);
}

.status-badge.unlocked {
    background: var(--tennis-yellow);
    color: var(--tennis-green-dark);
}

/* Rules */
.rules {
    background: var(--off-white);
}

.rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.rule-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.rule-icon {
    width: 56px;
    height: 56px;
    background: var(--tennis-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.rule-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--tennis-green-dark);
}

.rule-card p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

/* Registration */
.registration {
    background: linear-gradient(135deg, var(--tennis-green) 0%, var(--tennis-green-dark) 100%);
    color: var(--white);
}

.registration h2 {
    color: var(--white);
}

.registration-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
    align-items: start;
    max-width: 900px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .registration-wrapper {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

.registration-info {
    text-align: center;
}

.price-tag {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 32px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.price {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--tennis-yellow);
}

.price.discounted {
    color: var(--tennis-yellow);
}

.price.discounted::before {
    content: attr(data-original);
    display: block;
    font-size: 1.5rem;
    text-decoration: line-through;
    opacity: 0.6;
    color: var(--white);
}

.price-label {
    font-size: 1rem;
    opacity: 0.9;
}

.referral-info {
    margin-bottom: 24px;
}

.referral-badge {
    background: var(--tennis-yellow);
    color: var(--tennis-green-dark);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    display: inline-block;
}

.referral-program {
    background: rgba(255, 255, 255, 0.1);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.referral-program h3 {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.referral-program p {
    opacity: 0.9;
    font-size: 0.9375rem;
}

/* Form */
.registration-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--gray-800);
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--tennis-green);
    box-shadow: 0 0 0 3px rgba(45, 90, 39, 0.1);
}

.form-group input::placeholder {
    color: var(--gray-600);
    opacity: 0.6;
}

.submit-button {
    width: 100%;
    padding: 18px;
    font-size: 1.125rem;
    font-weight: 700;
    background: var(--tennis-green);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.submit-button:hover {
    background: var(--tennis-green-dark);
    transform: translateY(-2px);
}

.submit-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.button-loader {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    padding: 48px;
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-icon {
    width: 80px;
    height: 80px;
    background: var(--tennis-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 24px;
}

.modal-content h2 {
    font-size: 1.75rem;
    margin-bottom: 12px;
    color: var(--tennis-green-dark);
}

.modal-content > p {
    color: var(--gray-600);
    margin-bottom: 32px;
}

.referral-share {
    background: var(--gray-100);
    padding: 24px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
}

.referral-share h3 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--gray-800);
}

.share-link-box {
    display: flex;
    gap: 8px;
}

.share-link-box input {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: monospace;
    background: var(--white);
}

.copy-button {
    padding: 12px 20px;
    background: var(--tennis-green);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
    font-family: inherit;
}

.copy-button:hover {
    background: var(--tennis-green-dark);
}

.copy-button.copied {
    background: var(--tennis-green-light);
}

.share-hint {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-top: 12px;
}

.modal-close {
    padding: 14px 32px;
    background: var(--gray-200);
    color: var(--gray-800);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
    font-family: inherit;
}

.modal-close:hover {
    background: var(--gray-600);
    color: var(--white);
}

/* Footer */
.footer {
    background: var(--gray-800);
    color: var(--white);
    padding: 32px;
    text-align: center;
}

.footer p {
    opacity: 0.8;
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 640px) {
    .hero {
        padding: 60px 20px 80px;
    }

    .section {
        padding: 60px 0;
    }

    .registration-form {
        padding: 24px;
    }

    .modal-content {
        padding: 32px 24px;
    }

    .share-link-box {
        flex-direction: column;
    }
}