/* ===== VARIÁVEIS CSS ===== */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --dark-color: #34495e;
    --light-color: #ecf0f1;
    --font-family: 'Inter', sans-serif;
    --border-radius: 10px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* ===== COMPONENTES GLOBAIS ===== */
.btn {
    font-weight: 500;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #2ecc71);
    border: none;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #e67e22);
    border: none;
}

/* ===== HERO SECTION ===== */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.min-vh-50 {
    min-height: 50vh;
}

.stats-grid {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 2rem;
}

/* ===== FEATURE CARDS ===== */
.feature-card {
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.feature-card:hover::before {
    left: 100%;
}

.feature-icon {
    position: relative;
    z-index: 1;
}

/* ===== PRODUCT CARDS ===== */
.product-card {
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    background: white;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.card-img-wrapper {
    position: relative;
    overflow: hidden;
}

.card-img-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(0, 0, 0, 0.1), transparent);
    z-index: 1;
    transition: var(--transition);
}

.product-card:hover .card-img-wrapper::before {
    background: linear-gradient(45deg, rgba(0, 0, 0, 0.3), transparent);
}

.card-img-top {
    transition: var(--transition);
}

.product-card:hover .card-img-top {
    transform: scale(1.05);
}

.price-tag {
    background: linear-gradient(135deg, var(--success-color), #2ecc71);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* ===== NAVBAR ===== */
.navbar {
    backdrop-filter: blur(10px);
    background-color: rgba(52, 73, 94, 0.95) !important;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--warning-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

/* ===== FOOTER ===== */
footer {
    background: linear-gradient(135deg, var(--dark-color), var(--primary-color));
}

.social-links a {
    transition: var(--transition);
}

.social-links a:hover {
    transform: scale(1.2);
    color: var(--warning-color) !important;
}

/* ===== FORMS ===== */
.form-control {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    padding: 12px 16px;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 144, 220, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--dark-color);
}

/* ===== CARDS ===== */
.card {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* ===== ALERTS ===== */
.alert {
    border-radius: var(--border-radius);
    border: none;
    padding: 1rem 1.5rem;
    font-weight: 500;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
    }
    
    .stats-grid {
        margin-top: 1rem;
        padding: 1rem;
    }
    
    .feature-card {
        margin-bottom: 1rem;
    }
    
    .btn {
        padding: 10px 20px;
    }
}

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

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.animate-pulse {
    animation: pulse 1s infinite alternate;
}

/* ===== UTILITIES ===== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.shadow-custom {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* ===== LOADING ===== */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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