/* ==========================================================================
   SHINOBI - Premium Home Appliances
   Main Stylesheet
   ========================================================================== */

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Montserrat:wght@400;500;600;700;800;900&display=swap');

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
    /* Colors */
    --color-black: #0B0B0C;
    --color-charcoal: #1A1A1C;
    --color-gray-dark: #2A2A2C;
    --color-gray: #6B6B6E;
    --color-gray-light: #B9B7B2;
    --color-white: #F7F7F5;
    --color-cream: #F4F3EF;
    --color-gold: #D8A34A;
    --color-gold-light: #E8C87A;
    --color-gold-dark: #B88A3D;
    
    /* Typography */
    --font-display: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-full: 999px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.2);
    --shadow-gold: 0 4px 20px rgba(216, 163, 74, 0.3);
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-white);
    background-color: var(--color-black);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

.text-display {
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -0.03em;
}

.text-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gold);
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: 1000px;
}

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

.section-sm {
    padding: var(--space-xl) 0;
}

/* Grid */
.grid {
    display: grid;
    gap: var(--space-lg);
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Flex */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(11, 11, 12, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-white);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray-light);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: var(--transition-base);
}

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

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

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-xs);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition-base);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
    color: var(--color-black);
}

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

.btn-outline {
    border: 1.5px solid var(--color-gold);
    color: var(--color-gold);
    background: transparent;
}

.btn-outline:hover {
    background: rgba(216, 163, 74, 0.1);
    transform: translateY(-2px);
}

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

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(11, 11, 12, 0.4) 0%,
        rgba(11, 11, 12, 0.7) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero-label {
    margin-bottom: var(--space-md);
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.05;
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    color: var(--color-gray-light);
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* ==========================================================================
   Cards
   ========================================================================== */
.card {
    background: var(--color-charcoal);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(216, 163, 74, 0.3);
    box-shadow: var(--shadow-lg);
}

.card-image {
    aspect-ratio: 4/3;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.card-content {
    padding: var(--space-lg);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.card-text {
    color: var(--color-gray-light);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
}

/* Product Card */
.product-card {
    background: var(--color-charcoal);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: rgba(216, 163, 74, 0.3);
}

.product-card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-gray-dark);
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.product-card-content {
    padding: var(--space-lg);
}

.product-card-category {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gold);
    margin-bottom: var(--space-xs);
}

.product-card-title {
    font-size: 1.35rem;
    margin-bottom: var(--space-sm);
}

.product-card-desc {
    color: var(--color-gray-light);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
    line-height: 1.5;
}

/* ==========================================================================
   Feature Section
   ========================================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.feature-item {
    padding: var(--space-lg);
    background: var(--color-charcoal);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(216, 163, 74, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    color: var(--color-gold);
}

.feature-title {
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
}

.feature-text {
    color: var(--color-gray-light);
    font-size: 0.9rem;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
}

.section-label {
    margin-bottom: var(--space-sm);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    color: var(--color-gray-light);
    font-size: 1.1rem;
}

/* ==========================================================================
   Forms
   ========================================================================== */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-gray-light);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-white);
    background: var(--color-charcoal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

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

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

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background: var(--color-charcoal);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--space-md);
}

.footer-text {
    color: var(--color-gray-light);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
}

.footer-social {
    display: flex;
    gap: var(--space-sm);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--color-gold);
    color: var(--color-black);
}

.footer-title {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: var(--color-gray-light);
    font-size: 0.9rem;
}

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

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-copyright {
    color: var(--color-gray);
    font-size: 0.875rem;
}

.footer-tagline {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-gold);
}

/* ==========================================================================
   Product Page Specific
   ========================================================================== */
.product-hero {
    padding-top: 120px;
    padding-bottom: var(--space-2xl);
}

.product-hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.product-hero-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.product-hero-image img {
    width: 100%;
    height: auto;
}

.product-hero-content {
    max-width: 500px;
}

.product-hero-category {
    margin-bottom: var(--space-sm);
}

.product-hero-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-md);
}

.product-hero-desc {
    color: var(--color-gray-light);
    font-size: 1.1rem;
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

/* Specs Table */
.specs-table {
    width: 100%;
    border-collapse: collapse;
}

.specs-table tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.specs-table td {
    padding: var(--space-sm) 0;
    font-size: 0.9rem;
}

.specs-table td:first-child {
    color: var(--color-gray-light);
    width: 40%;
}

/* Buy Section */
.buy-section {
    background: var(--color-charcoal);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
}

.buy-title {
    margin-bottom: var(--space-md);
}

.buy-text {
    color: var(--color-gray-light);
    margin-bottom: var(--space-lg);
}

.buy-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.buy-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-gray-dark);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    min-width: 160px;
    justify-content: center;
}

.buy-btn:hover {
    background: var(--color-gold);
    color: var(--color-black);
}

.buy-btn img {
    width: 24px;
    height: 24px;
}

/* ==========================================================================
   Contact Page
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(216, 163, 74, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-gold);
    flex-shrink: 0;
}

.contact-item-title {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.contact-item-text {
    color: var(--color-gray-light);
    font-size: 0.9rem;
}

.contact-form-wrapper {
    background: var(--color-charcoal);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .product-hero-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-black);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.text-gold { color: var(--color-gold); }
.text-gray { color: var(--color-gray-light); }
.text-center { text-align: center; }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.bg-charcoal { background: var(--color-charcoal); }
.bg-cream { background: var(--color-cream); color: var(--color-black); }

/* Grain Overlay */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Selection */
::selection {
    background: rgba(216, 163, 74, 0.3);
    color: var(--color-white);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-black);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-dark);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gold);
}