/* =========================================
   BEKASİSTEM PREMIUM DESIGN SYSTEM
   ========================================= */

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

:root {
    /* Colors */
    --color-bg: #0f172a;       /* Deep Slate */
    --color-surface: #1e293b;  /* Lighter Slate */
    --color-surface-glass: rgba(30, 41, 59, 0.7);
    --color-primary: #ef4444;  /* Vibrant Fire Red */
    --color-primary-glare: #f87171;
    --color-text-main: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-accent: #38bdf8;   /* Subtle Blue Accent */

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --container-width: 1200px;
    --header-height: 80px;
    --section-spacing: 120px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

/* =========================================
   TYPOGRAPHY
   ========================================= */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.2;
    color: #fff;
}

h1 {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.text-gradient {
    background: linear-gradient(135deg, #fff 0%, var(--color-text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-highlight {
    color: var(--color-primary);
}

/* =========================================
   LAYOUT UTILITIES
   ========================================= */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

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

.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* =========================================
   COMPONENTS
   ========================================= */

/* Button */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 10px 30px -10px rgba(239, 68, 68, 0.5);
}

.btn-primary:hover {
    transform: translateY(-3px);
    background: var(--color-primary-glare);
    box-shadow: 0 20px 40px -10px rgba(239, 68, 68, 0.6);
}

.btn-outline {
    border-color: rgba(255,255,255,0.2);
    color: white;
}

.btn-outline:hover {
    background: white;
    color: var(--color-bg);
}

/* Glass Card */
.glass-card {
    background: var(--color-surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 2rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255,255,255,0.1);
}

/* =========================================
   HEADER
   ========================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.4s ease;
    padding: 1.5rem 0;
}

.header.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: 0 4px 30px rgba(0,0,0,0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    height: 48px;
    width: auto;
    object-fit: contain;
}

/* .logo span { color: var(--color-primary); } // Removed text styles */

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

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.nav-links a:hover, .nav-links a.active {
    color: white;
}

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at center, rgba(15,23,42,0.4) 0%, rgba(15,23,42,0.95) 100%),
                url('assets/images/hero-bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.hero-badges {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.badge {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-primary-glare);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* =========================================
   FEATURES SECTION
   ========================================= */
.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-surface), var(--color-bg));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--color-primary);
    border: 1px solid rgba(255,255,255,0.05);
}

/* =========================================
   PRODUCT SHOWCASE
   ========================================= */
.product-showcase {
    position: relative;
    background: var(--color-surface);
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.product-image {
    position: relative;
}

.product-image img {
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255,255,255,0.05);
}

.tech-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.tech-list i {
    color: var(--color-primary);
    margin-top: 0.25rem;
}

/* =========================================
   MODELS GRID
   ========================================= */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.model-card h3 {
    margin-bottom: 0.5rem;
    color: white;
}

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

.tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    background: rgba(255,255,255,0.05);
    color: var(--color-text-muted);
}

/* =========================================
   FOOTER
   ========================================= */
.footer {
    border-top: 1px solid rgba(255,255,255,0.05);
    background: #0b1120;
    padding-top: 5rem;
    padding-bottom: 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.05);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* =========================================
   ANIMATIONS & RESPONSIVE
   ========================================= */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 968px) {
    h1 { font-size: 3rem; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .nav-links { display: none; } /* Mobile menu simplified for MVP */
}