/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --dark-bg: #1a1a2e;
    --darker-bg: #16213e;
    --light-bg: #f5f5f5;
    --text-dark: #333;
    --text-light: #fff;
    --text-gray: #666;
    --border-color: #ddd;
    --success: #4CAF50;
    --warning: #ff9800;
    --danger: #f44336;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.2);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--light-bg);
}

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

/* ===== NAVIGATION ===== */
.navbar {
    background: var(--dark-bg);
    color: var(--text-light);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-light);
}

.nav-brand i {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-admin {
    background: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-admin:hover {
    background: var(--secondary-color);
    color: var(--text-light);
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
    color: var(--text-light);
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="30" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="70" cy="20" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="90" cy="60" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="30" cy="80" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    animation: float 20s infinite linear;
}

@keyframes float {
    from { transform: translateY(0); }
    to { transform: translateY(-100px); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.4s backwards;
}

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-light);
}

.btn-primary:hover {
    background: #45a049;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--secondary-color);
    color: var(--text-light);
}

.btn-secondary:hover {
    background: #1976D2;
}

.btn-outline {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--text-light);
}

.btn-outline:hover {
    background: var(--text-light);
    color: var(--dark-bg);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-danger {
    background: var(--danger);
    color: var(--text-light);
}

.btn-danger:hover {
    background: #d32f2f;
}

/* ===== SECTIONS ===== */
section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--dark-bg);
}

.section-subtitle {
    text-align: center;
    color: var(--text-gray);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* ===== PRODUCTS SECTION ===== */
.products-section {
    background: var(--text-light);
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.category-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--light-bg);
    border: 2px solid transparent;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 600;
}

.category-tab:hover {
    background: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-2px);
}

.category-tab.active {
    background: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--text-light);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-card[style*="display: none"] {
    display: none !important;
}

.product-image {
    height: 200px;
    background: var(--light-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-placeholder {
    font-size: 4rem;
    color: var(--text-gray);
    opacity: 0.3;
}

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--warning);
    color: var(--text-light);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.product-badge.instant {
    background: var(--success);
}

.product-info {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-name {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--dark-bg);
}

.product-description {
    color: var(--text-gray);
    margin-bottom: 1rem;
    flex-grow: 1;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.product-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.btn-buy {
    padding: 0.6rem 1.2rem;
}

/* ===== HOW TO BUY SECTION ===== */
.how-to-buy-section {
    background: var(--dark-bg);
    color: var(--text-light);
}

.how-to-buy-section .section-title {
    color: var(--text-light);
}

.how-to-buy-section .section-subtitle {
    color: rgba(255,255,255,0.7);
}

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

.step-card {
    background: var(--darker-bg);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.step-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.step-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin: 1rem 0;
}

.step-card h3 {
    margin: 1rem 0;
    font-size: 1.3rem;
}

.step-card p {
    color: rgba(255,255,255,0.8);
}

/* ===== FEATURES SECTION ===== */
.features-section {
    background: var(--light-bg);
}

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

.feature-card {
    background: var(--text-light);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    color: var(--dark-bg);
}

.feature-card p {
    color: var(--text-gray);
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--text-light);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
    position: relative;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    right: 1.5rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-gray);
    transition: var(--transition);
}

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

.modal-title {
    margin-bottom: 1.5rem;
    color: var(--dark-bg);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: var(--transition);
}

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

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-gray);
    font-size: 0.9rem;
}

.product-summary {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark-bg);
    color: var(--text-light);
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.3rem;
    font-weight: bold;
}

.footer-brand i {
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

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

/* ===== ALERTS ===== */
.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

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

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

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

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

/* ===== LOADING ===== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: var(--text-light);
    animation: spin 1s ease-in-out infinite;
}

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

/* ===== TABLE ===== */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--text-light);
    box-shadow: var(--shadow);
    border-radius: 10px;
    overflow: hidden;
}

thead {
    background: var(--dark-bg);
    color: var(--text-light);
}

th, td {
    padding: 1rem;
    text-align: left;
}

tbody tr {
    border-bottom: 1px solid var(--border-color);
}

tbody tr:hover {
    background: var(--light-bg);
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

.badge-success {
    background: var(--success);
    color: var(--text-light);
}

.badge-warning {
    background: var(--warning);
    color: var(--text-light);
}

.badge-danger {
    background: var(--danger);
    color: var(--text-light);
}

.badge-info {
    background: var(--secondary-color);
    color: var(--text-light);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark-bg);
        flex-direction: column;
        padding: 1rem;
        gap: 1rem;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

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

    .category-tabs {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 1rem;
    }

    .modal-content {
        margin: 10% auto;
        width: 95%;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .btn {
        font-size: 0.9rem;
        padding: 0.6rem 1rem;
    }

    .product-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-buy {
        width: 100%;
    }
}