/* ==========================================================================
   Modern Altay Sanayi Design System
   ========================================================================== */

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

:root {
    /* Colors */
    --clr-primary: #0f172a; /* Deep Navy */
    --clr-primary-light: #1e293b;
    --clr-accent: #2563eb; /* Electric Blue */
    --clr-accent-hover: #1d4ed8;
    --clr-surface: #ffffff;
    --clr-background: #f8fafc;
    --clr-text-main: #334155;
    --clr-text-muted: #64748b;
    --clr-border: #e2e8f0;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing & Layout */
    --container-max: 1280px;
    --section-pad: 5rem 2rem;
    
    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.4);
    
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-pill: 9999px;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--clr-primary);
    line-height: 1.2;
    font-weight: 700;
}

a {
    color: var(--clr-accent);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--clr-accent-hover);
}

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

ul {
    list-style: none;
}

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

.section {
    padding: var(--section-pad);
}

/* ==========================================================================
   Typography Utilities
   ========================================================================== */
.text-gradient {
    background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--clr-accent);
    border-radius: var(--radius-pill);
}

.section-subtitle {
    text-align: center;
    color: var(--clr-text-muted);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-modern {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-pill);
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background-color: var(--clr-accent);
    color: white !important;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--clr-accent-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--clr-text-main) !important;
    border: 2px solid var(--clr-border);
}

.btn-outline:hover {
    border-color: var(--clr-accent);
    color: var(--clr-accent) !important;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.modern-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: var(--transition-smooth);
}

.modern-header.scrolled {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.modern-header.scrolled .header-inner {
    height: 64px;
}

.logo-main {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--clr-primary);
    display: flex;
    flex-direction: column;
    line-height: 1.1;
    text-decoration: none;
}

.logo-main:hover {
    color: var(--clr-primary);
}

.logo-main span {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 2px;
    color: var(--clr-accent);
    text-transform: uppercase;
}

.main-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    color: var(--clr-text-main);
    font-size: 1rem;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link:hover {color: var(--clr-accent);}
.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}
.nav-link.active {
    color: var(--clr-accent);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--clr-primary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-wrapper {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    background-color: var(--clr-primary);
    overflow: hidden;
    padding-top: 80px; /* Offset for fixed header */
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.4) 100%);
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

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

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-pill);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: #e2e8f0;
    animation: fadeUp 0.8s ease forwards;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    color: white;
    margin-bottom: 1.5rem;
    animation: fadeUp 1s ease forwards;
}

.hero-title span {
    color: var(--clr-accent);
}

.hero-desc {
    font-size: 1.25rem;
    color: #cbd5e1;
    margin-bottom: 2.5rem;
    max-width: 600px;
    animation: fadeUp 1.2s ease forwards;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    animation: fadeUp 1.4s ease forwards;
}

.btn-white {
    background: white;
    color: var(--clr-primary) !important;
}
.btn-white:hover {
    background: #f1f5f9;
}

/* ==========================================================================
   Features Grid (For Home & About)
   ========================================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--clr-surface);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--clr-border);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--clr-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon-wrapper {
    width: 64px;
    height: 64px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--clr-accent);
    font-size: 1.75rem;
    transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrapper {
    background: var(--clr-accent);
    color: white;
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-desc {
    color: var(--clr-text-muted);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.modern-footer {
    background-color: var(--clr-primary);
    color: white;
    padding: 5rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-brand .logo-main {
    color: white;
    margin-bottom: 1.5rem;
}

.footer-desc {
    color: #94a3b8;
    max-width: 300px;
}

.footer-heading {
    color: white;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: #94a3b8;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links a:hover {
    color: white;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    color: #94a3b8;
}

.footer-contact i {
    color: var(--clr-accent);
    margin-right: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #64748b;
    font-size: 0.875rem;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.social-icons a:hover {
    background: var(--clr-accent);
}

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

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        align-items: center;
        padding: 2rem;
        transition: var(--transition-smooth);
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}