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

:root {
    --primary-green: #007A4D;
    --white: #FFFFFF;
    --black: #000000;
    --dark-gray: #333333;
    --spacing-1: 8px;
    --spacing-2: 16px;
    --spacing-3: 24px;
    --spacing-4: 32px;
    --border-radius: 12px;
    --border-radius-modal: 20px;
    --shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    font-weight: 400;
    color: var(--black);
    background-color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-2);
}

/* Typography */
h1 {
    font-size: 26px;
    font-weight: 600;
    line-height: 1.2;
}

h2 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.3;
}

h3 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.3;
}

h4 {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
}

/* Header */
.header {
    background-color: var(--primary-green);
    padding: var(--spacing-2) 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: var(--white);
    font-size: 24px;
    font-weight: 600;
    text-decoration: none;
}

.nav {
    display: flex;
    gap: var(--spacing-2);
    align-items: center;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--border-radius);
    transition: background-color 0.3s;
    position: relative;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background-color: #ff4444;
    color: var(--white);
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 24px;
    cursor: pointer;
    padding: var(--spacing-1);
}

.mobile-menu {
    display: none;
    background-color: var(--primary-green);
    padding: var(--spacing-2);
    box-shadow: var(--shadow);
}

.mobile-menu.active {
    display: block;
}

.mobile-menu-link {
    display: block;
    color: var(--white);
    text-decoration: none;
    padding: var(--spacing-2);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-1);
    transition: background-color 0.3s;
}

.mobile-menu-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    text-transform: uppercase;
}

.btn-primary:hover {
    background-color: #005a38;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    text-transform: uppercase;
}

.btn-secondary:hover {
    background-color: var(--primary-green);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-large {
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: 16px;
}

.btn-danger {
    background-color: #ff4444;
    color: var(--white);
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    text-transform: uppercase;
}

.btn-danger:hover {
    background-color: #cc0000;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: var(--spacing-4) 0;
}

/* Welcome Section */
.welcome-section {
    text-align: center;
    margin-bottom: var(--spacing-4);
}

.section-title {
    color: var(--primary-green);
    margin-bottom: var(--spacing-2);
}

.section-subtitle {
    color: var(--dark-gray);
    font-size: 16px;
}

/* Challenge Card */
.challenge-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: var(--spacing-3);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-4);
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-3);
    padding-bottom: var(--spacing-2);
    border-bottom: 2px solid #f0f0f0;
}

.challenge-title {
    color: var(--primary-green);
}

.challenge-date {
    color: var(--dark-gray);
    font-size: 14px;
}

.odds-display {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-3);
}

.odds-original,
.odds-sale {
    text-align: center;
    padding: var(--spacing-2);
    border-radius: var(--border-radius);
    background-color: #f8f8f8;
}

.odds-label {
    display: block;
    font-size: 14px;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-1);
}

.odds-value {
    display: block;
    font-size: 32px;
    font-weight: 600;
}

.odds-value.muted {
    color: var(--dark-gray);
    text-decoration: line-through;
}

.odds-value.highlight {
    color: var(--primary-green);
}

.challenge-info {
    margin-bottom: var(--spacing-3);
}

.info-text {
    color: var(--dark-gray);
    font-size: 14px;
    margin-bottom: var(--spacing-1);
}

.no-challenge {
    text-align: center;
    padding: var(--spacing-4);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
}

.stat-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: var(--spacing-3);
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-1);
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-green);
}

/* Leaderboard Section */
.leaderboard-section {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: var(--spacing-3);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-4);
}

.leaderboard-list {
    margin: var(--spacing-3) 0;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-2);
    border-bottom: 1px solid #f0f0f0;
    gap: var(--spacing-2);
}

.leaderboard-item:last-child {
    border-bottom: none;
}

.rank {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-green);
    min-width: 40px;
}

.winner-name {
    flex: 1;
    color: var(--black);
}

.winner-amount {
    font-weight: 600;
    color: var(--primary-green);
}

/* How It Works */
.how-it-works {
    margin-bottom: var(--spacing-4);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2);
    margin-top: var(--spacing-3);
}

.step-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: var(--spacing-3);
    box-shadow: var(--shadow);
    text-align: center;
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--primary-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 600;
    margin: 0 auto var(--spacing-2);
}

.step-title {
    color: var(--primary-green);
    margin-bottom: var(--spacing-1);
}

.step-text {
    color: var(--dark-gray);
    font-size: 14px;
}

/* Payment Methods */
.payment-methods {
    margin-bottom: var(--spacing-4);
}

.payment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2);
    margin-top: var(--spacing-3);
}

.payment-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: var(--spacing-3);
    box-shadow: var(--shadow);
    text-align: center;
    border: 2px solid var(--primary-green);
}

.payment-name {
    color: var(--primary-green);
    margin-bottom: var(--spacing-1);
}

.payment-info {
    color: var(--dark-gray);
    font-size: 14px;
}

/* Support Section */
.support-section {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: var(--spacing-3);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-4);
    text-align: center;
}

.support-buttons {
    display: flex;
    gap: var(--spacing-2);
    justify-content: center;
    margin-top: var(--spacing-3);
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background-color: var(--primary-green);
    color: var(--white);
    padding: var(--spacing-4) 0;
    margin-top: var(--spacing-4);
}

.footer-text {
    text-align: center;
    margin-bottom: var(--spacing-2);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--white);
    text-decoration: none;
    font-size: 14px;
    transition: opacity 0.3s;
}

.footer-link:hover {
    opacity: 0.8;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-3);
}

.form-label {
    display: block;
    color: var(--black);
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    font-size: 14px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px var(--spacing-2);
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-family: 'Poppins', sans-serif;
    transition: border-color 0.3s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-green);
}

.form-input::placeholder {
    color: var(--dark-gray);
}

.form-error {
    color: #ff4444;
    font-size: 12px;
    margin-top: var(--spacing-1);
    display: block;
}

.form-success {
    color: var(--primary-green);
    font-size: 12px;
    margin-top: var(--spacing-1);
    display: block;
}

.radio-group {
    display: flex;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    padding: var(--spacing-2);
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s;
}

.radio-label:hover {
    border-color: var(--primary-green);
}

.radio-label input[type="radio"] {
    margin-right: var(--spacing-1);
}

.radio-label input[type="radio"]:checked + span {
    color: var(--primary-green);
    font-weight: 600;
}

/* Alert Messages */
.alert {
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-3);
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--white);
    border-radius: var(--border-radius-modal);
    padding: var(--spacing-4);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-3);
    padding-bottom: var(--spacing-2);
    border-bottom: 2px solid #f0f0f0;
}

.modal-title {
    color: var(--primary-green);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--dark-gray);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--black);
}

.modal-body {
    margin-bottom: var(--spacing-3);
}

.modal-footer {
    display: flex;
    gap: var(--spacing-2);
    justify-content: flex-end;
}

/* Table */
.table-responsive {
    overflow-x: auto;
    margin-bottom: var(--spacing-3);
}

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

.table th {
    background-color: var(--primary-green);
    color: var(--white);
    padding: var(--spacing-2);
    text-align: left;
    font-weight: 600;
    font-size: 14px;
}

.table td {
    padding: var(--spacing-2);
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
}

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

.table tr:hover {
    background-color: #f8f8f8;
}

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-pending {
    background-color: #fff3cd;
    color: #856404;
}

.status-paid {
    background-color: #d4edda;
    color: #155724;
}

.status-rejected {
    background-color: #f8d7da;
    color: #721c24;
}

.status-won {
    background-color: #d1ecf1;
    color: #0c5460;
}

.status-lost {
    background-color: #e2e3e5;
    color: #383d41;
}

/* Loading Spinner */
.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-green);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-3) auto;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 22px;
    }

    h2 {
        font-size: 18px;
    }

    h3 {
        font-size: 16px;
    }

    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .odds-display {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }

    .payment-grid {
        grid-template-columns: 1fr;
    }

    .support-buttons {
        flex-direction: column;
    }

    .support-buttons .btn-primary,
    .support-buttons .btn-secondary {
        width: 100%;
    }

    .footer-links {
        flex-direction: column;
        align-items: center;
    }

    .modal-content {
        width: 95%;
        padding: var(--spacing-3);
    }

    .table {
        font-size: 12px;
    }

    .table th,
    .table td {
        padding: var(--spacing-1);
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        max-width: 900px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .btn-primary,
    .btn-secondary,
    .mobile-menu-btn {
        display: none;
    }
}