/**
 * Alpine-Inspired Modern Design System for Blindajes.com.mx
 * Sophisticated Dark Theme with Premium Feel
 */

:root {
    /* Dark Color Palette - Alpine Inspired */
    --dark-bg: #171717;
    --dark-bg-secondary: #1f1f1f;
    --dark-bg-tertiary: #2a2a2a;
    --dark-overlay: rgba(23, 23, 23, 0.85);

    /* Gold/Accent Colors */
    --gold: #d4af37;
    --gold-light: #e8c547;
    --gold-dark: #b8941f;

    /* Primary - Sophisticated Orange */
    --primary: #ff6b35;
    --primary-dark: #e84118;
    --primary-light: #ff8c5a;

    /* Neutrals */
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --font-heading: 'Poppins', var(--font-primary);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Shadows - Dark Theme */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    --shadow-gold: 0 0 30px rgba(212, 175, 55, 0.3);

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-200);
    background-color: var(--dark-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--white);
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.875rem); }
h5 { font-size: clamp(1.125rem, 2vw, 1.5rem); }
h6 { font-size: clamp(1rem, 1.5vw, 1.25rem); }

p {
    margin-bottom: 1.25rem;
    color: var(--gray-300);
    font-size: 1.0625rem;
    line-height: 1.8;
}

a {
    color: var(--gold);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--gold-light);
}

/* Strong/Bold - Gold Accent like Alpine */
strong, b {
    color: var(--gold);
    font-weight: 600;
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-narrow {
    max-width: 1100px;
}

.container-wide {
    max-width: 1600px;
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-dark {
    background-color: var(--dark-bg-secondary);
}

.section-darker {
    background-color: var(--dark-bg);
}

/* Navigation - Sticky with Blur Effect */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--dark-overlay);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color var(--transition-base);
}

.navbar-brand:hover {
    color: var(--gold);
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-link {
    color: var(--gray-300);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--gold);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section - Full Screen with Video Background Feel */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0f0f0f 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 107, 53, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.02) 2px,
            rgba(255, 255, 255, 0.02) 4px
        );
    pointer-events: none;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 1000px;
    padding: var(--spacing-xl);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
    line-height: 1.1;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    margin-bottom: var(--spacing-2xl);
    color: var(--gray-300);
    font-weight: 400;
    line-height: 1.6;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons - Premium Style */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 1rem 2.25rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-primary);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background-color: var(--gold);
    color: var(--dark-bg);
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);
}

.btn-primary:hover {
    background-color: var(--gold-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.5);
    color: var(--dark-bg);
}

.btn-secondary {
    background-color: var(--dark-bg-tertiary);
    color: var(--white);
    border-color: var(--gray-700);
}

.btn-secondary:hover {
    background-color: var(--gray-700);
    border-color: var(--gray-600);
    color: var(--white);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--white);
    color: var(--white);
}

.btn-outline:hover {
    background-color: var(--white);
    color: var(--dark-bg);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1.25rem 2.75rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.75rem 1.75rem;
    font-size: 0.9375rem;
}

/* Cards - Dark Theme */
.card {
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(212, 175, 55, 0.3);
}

.card-img {
    width: 100%;
    height: 280px;
    object-fit: cover;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.card-text {
    color: var(--gray-400);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

/* Grid */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Vehicle Grid */
.vehicle-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.vehicle-card {
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    position: relative;
}

.vehicle-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.vehicle-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: var(--gold);
}

.vehicle-card:hover::before {
    opacity: 1;
}

.vehicle-card.selected {
    border-color: var(--gold);
    box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.2), var(--shadow-2xl);
}

.vehicle-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--gray-800), var(--gray-900));
}

.vehicle-info {
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.vehicle-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.vehicle-price {
    color: var(--gray-400);
    font-size: 0.9375rem;
}

/* Configurator Specific */
.configurator-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.step-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-3xl);
    position: relative;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.step-indicator::before {
    content: '';
    position: absolute;
    top: 28px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gray-700), var(--gray-800));
    z-index: 0;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background-color: var(--dark-bg-tertiary);
    color: var(--gray-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    transition: all var(--transition-base);
    border: 3px solid var(--gray-700);
}

.step.active .step-number {
    background-color: var(--gold);
    color: var(--dark-bg);
    box-shadow: 0 0 0 6px rgba(212, 175, 55, 0.2), var(--shadow-gold);
    border-color: var(--gold);
}

.step.completed .step-number {
    background-color: var(--dark-bg-secondary);
    color: var(--gold);
    border-color: var(--gold);
}

.step-label {
    font-size: 0.9375rem;
    color: var(--gray-500);
    text-align: center;
    font-weight: 500;
}

.step.active .step-label {
    color: var(--gold);
    font-weight: 600;
}

/* Armoring Level Cards */
.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.level-card {
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.level-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.level-card:hover {
    transform: translateY(-4px);
    border-color: var(--gold);
    box-shadow: var(--shadow-2xl);
}

.level-card:hover::before {
    opacity: 1;
}

.level-card.selected {
    border-color: var(--gold);
    background: linear-gradient(135deg, var(--dark-bg-secondary) 0%, rgba(212, 175, 55, 0.05) 100%);
    box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.2), var(--shadow-2xl);
}

.level-card.popular::after {
    content: 'POPULAR';
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--gold);
    color: var(--dark-bg);
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Customization Options */
.customization-section {
    margin-bottom: var(--spacing-3xl);
}

.customization-category-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--gray-800);
}

.customization-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: var(--spacing-lg);
}

.customization-card {
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 2px solid var(--gray-800);
    cursor: pointer;
    transition: all var(--transition-base);
}

.customization-card:hover {
    border-color: var(--gold);
    transform: translateX(4px);
}

.customization-card.selected {
    border-color: var(--gold);
    background: linear-gradient(135deg, var(--dark-bg-secondary) 0%, rgba(212, 175, 55, 0.05) 100%);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15);
}

.customization-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-sm);
}

.customization-name {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--white);
}

.customization-price {
    font-weight: 700;
    color: var(--gold);
    font-size: 1.125rem;
}

.customization-description {
    font-size: 0.9375rem;
    color: var(--gray-400);
    line-height: 1.6;
}

/* Price Summary - Sticky Sidebar */
.price-summary {
    position: sticky;
    top: 120px;
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-2xl);
    border: 1px solid rgba(212, 175, 55, 0.2);
}

.price-summary-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
}

.price-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gray-800);
    color: var(--gray-300);
}

.price-item-label {
    color: var(--gray-400);
}

.price-item-value {
    font-weight: 600;
    color: var(--white);
}

.price-total {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gold);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 3px solid var(--gray-700);
    text-align: right;
}

/* Filters */
.filters {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    border: 2px solid var(--gray-700);
    background-color: var(--dark-bg-tertiary);
    color: var(--gray-300);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    border-color: var(--gold);
    color: var(--white);
}

.filter-btn.active {
    background-color: var(--gold);
    border-color: var(--gold);
    color: var(--dark-bg);
    font-weight: 600;
}

/* Search */
.search-box {
    position: relative;
    margin-bottom: var(--spacing-xl);
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3.5rem;
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-700);
    font-size: 1rem;
    background-color: var(--dark-bg-tertiary);
    color: var(--white);
    transition: all var(--transition-base);
}

.search-input::placeholder {
    color: var(--gray-500);
}

.search-input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.15);
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
    font-size: 1.125rem;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background-color: var(--gold);
    color: var(--dark-bg);
}

.badge-popular {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    color: var(--dark-bg);
    box-shadow: 0 2px 10px rgba(212, 175, 55, 0.3);
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-up {
    animation: slideUp 0.8s ease-out;
}

/* Loading State */
.loading {
    display: inline-block;
    width: 32px;
    height: 32px;
    border: 4px solid var(--gray-700);
    border-top-color: var(--gold);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .vehicle-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }

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

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

@media (max-width: 768px) {
    .hero {
        min-height: 85vh;
        padding-top: 100px;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .navbar-nav {
        gap: var(--spacing-md);
    }

    .nav-link {
        font-size: 0.875rem;
    }

    .step-label {
        font-size: 0.75rem;
    }

    .step-number {
        width: 48px;
        height: 48px;
        font-size: 1.125rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }
}

@media (max-width: 640px) {
    .navbar-nav {
        display: none;
    }

    .step-label {
        display: none;
    }

    .grid-2, .grid-3, .grid-4, .vehicle-grid, .level-grid, .customization-grid {
        grid-template-columns: 1fr;
    }

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles */
*:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

button:focus-visible,
.btn:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 3px;
}