/* Reset e Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

:root {
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --text: #333;
    --text-light: #666;
    --bg: #ffffff;
    --bg-light: #f5f5f5;
    --border: #ddd;
    --error: #dc3545;
    --success: #28a745;
}

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

main {
    min-height: 60vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background: var(--bg);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

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

.logo h1 {
    color: var(--primary);
    font-size: 1.5rem;
}

.nav {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.nav a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
    font-weight: 600;
}

.nav a.active {
    border-bottom: 2px solid var(--primary);
    padding-bottom: 0.25rem;
}

/* Botões */
.btn-primary, .btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--border);
}

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

.btn-block {
    display: block;
    width: 100%;
}

/* Banner */
.banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.banner h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.banner p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* Seções */
.section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text);
}

.bg-light {
    background: var(--bg-light);
}

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

.card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-body {
    padding: 1.5rem;
}

.card-body h3 {
    margin-bottom: 0.5rem;
    color: var(--text);
}

.card-body p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.price {
    margin: 1rem 0;
}

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

.old-price {
    text-decoration: line-through;
    color: var(--text-light);
}

.promo-price {
    font-size: 1.5rem;
    color: var(--error);
    font-weight: bold;
    margin-left: 0.5rem;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.card-actions a {
    flex: 1;
}

/* Formulários */
.form {
    max-width: 600px;
    margin: 2rem auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

/* Filtros */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filters input,
.filters select {
    flex: 1;
    min-width: 200px;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
}

/* Tabelas */
.table-container {
    margin-top: 2rem;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

.table thead {
    background: var(--primary);
    color: white;
}

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

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

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

/* Sobre */
.about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 8px;
}

/* Produto Detalhe */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.product-gallery .main-image img {
    width: 100%;
    border-radius: 8px;
}

.thumbnails {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.thumbnails img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 4px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s;
}

.thumbnails img:hover {
    border-color: var(--primary);
}

.specs table {
    width: 100%;
    margin: 1rem 0;
}

.specs td {
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.prices {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.price-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.price-item.promo {
    color: var(--error);
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: white;
    padding: 4rem 0 0;
    margin-top: 4rem;
    border-top: 3px solid var(--primary);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-section h3 {
    margin-bottom: 1.5rem;
    color: var(--primary);
    font-size: 1.3rem;
    font-weight: 700;
}

.footer-section p {
    color: #ccc;
    font-size: 0.95rem;
    line-height: 1.6;
}

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

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

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    background: rgba(0,0,0,0.3);
    padding: 1.5rem 0;
    text-align: center;
}

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

.header a {
    color: inherit;
}

/* Melhorias visuais */
.promo-badge {
    background: #ff4444;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: bold;
    display: inline-block;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.bg-light {
    background: #f8f9fa;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Responsivo */
@media (max-width: 992px) {
    .about,
    .product-detail {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav {
        gap: 1rem;
    }

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

    .banner h1 {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 576px) {
    .banner {
        padding: 2rem 0;
    }

    .banner h1 {
        font-size: 1.5rem;
    }

    .banner p {
        font-size: 1rem;
    }

    .filters {
        flex-direction: column;
    }

    .card-actions {
        flex-direction: column;
    }
}