/* ==========================================================================
   Vetroline Premium Design System
   ========================================================================== */

:root {
    /* Color Palette */
    --clr-primary: 221, 100%, 50%; /* #0052ff */
    --clr-primary-dark: 221, 100%, 40%;
    --clr-secondary: 210, 20%, 10%; /* Dark slate */
    --clr-accent: 210, 100%, 60%;
    
    --clr-text-main: 210, 15%, 20%;
    --clr-text-muted: 210, 10%, 45%;
    --clr-text-light: 0, 0%, 100%;
    
    --clr-bg-main: 210, 20%, 98%;
    --clr-bg-alt: 0, 0%, 100%;
    
    /* Typography */
    --font-heading: 'Roboto Slab', serif;
    --font-body: 'Maven Pro', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-premium: 0 30px 60px -12px rgba(0, 50, 150, 0.15), 0 18px 36px -18px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

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

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

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

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

/* ==========================================================================
   Layout & Container
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

.section-alt {
    background-color: hsl(var(--clr-bg-alt));
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-inline: auto;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, hsl(var(--clr-primary)), hsl(var(--clr-secondary)));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.section-subtitle {
    font-size: 1.125rem;
    color: hsl(var(--clr-text-muted));
}

/* ==========================================================================
   Components
   ========================================================================== */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    text-align: center;
}

.btn-primary {
    background-color: hsl(var(--clr-primary));
    color: hsl(var(--clr-text-light));
    box-shadow: 0 10px 20px -10px hsl(var(--clr-primary));
}

.btn-primary:hover {
    background-color: hsl(var(--clr-primary-dark));
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -10px hsl(var(--clr-primary));
}

.btn-outline {
    border: 2px solid hsl(var(--clr-primary));
    color: hsl(var(--clr-primary));
}

.btn-outline:hover {
    background-color: hsl(var(--clr-primary));
    color: hsl(var(--clr-text-light));
}

/* Cards */
.card {
    background-color: hsl(var(--clr-bg-alt));
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-premium);
}

.card-img-top {
    width: 100%;
    height: 240px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

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

.card-text {
    color: hsl(var(--clr-text-muted));
    flex-grow: 1;
}

/* Glassmorphism Panel */
.glass-panel {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-normal);
    background-color: transparent;
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 0.5rem 0;
}

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

.logo img {
    height: 80px; /* Slightly larger */
    width: auto;
    transition: all var(--transition-normal);
}

.header:not(.scrolled) .logo img {
    filter: brightness(0) invert(1) drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}

.header.scrolled .logo img {
    height: 60px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-weight: 600;
    color: hsl(var(--clr-secondary));
    position: relative;
    padding: 0.5rem 0;
}

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

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

.header:not(.scrolled) .nav-link {
    color: hsl(var(--clr-text-light));
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

/* Sayfalarda header altı boşluk (Ana sayfa hariç) */
.page-spacer {
    height: 100px;
    background-color: hsl(var(--clr-secondary));
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    z-index: 1001;
}

.mobile-toggle span {
    display: block;
    width: 30px;
    height: 3px;
    background-color: hsl(var(--clr-secondary));
    border-radius: 3px;
    transition: all var(--transition-normal);
}

.header:not(.scrolled) .mobile-toggle span {
    background-color: hsl(var(--clr-text-light));
}

.mobile-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
    background-color: hsl(var(--clr-secondary));
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
    background-color: hsl(var(--clr-secondary));
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: hsl(var(--clr-bg-alt));
    padding: 6rem 2rem 2rem;
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    transition: right var(--transition-normal);
    z-index: 999;
}

.mobile-menu.open {
    right: 0;
}

.mobile-menu .nav-links {
    flex-direction: column;
    gap: 1.5rem;
}

.mobile-menu .nav-link {
    font-size: 1.25rem;
    color: hsl(var(--clr-secondary)) !important;
    text-shadow: none !important;
}

/* ==========================================================================
   Hero Section (Home)
   ========================================================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: hsl(var(--clr-text-light));
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('../images/acilis.jpg');
    background-size: cover;
    background-position: center;
    z-index: -2;
    transform: scale(1.05); /* For slight parallax/animation */
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,0,0,0.7) 0%, rgba(0, 82, 255, 0.4) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    padding: 0 var(--spacing-sm);
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: var(--spacing-sm);
    color: hsl(var(--clr-text-light));
    animation: fadeInUp 1s ease forwards;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    opacity: 0;
    animation: fadeInUp 1s ease 0.3s forwards;
}

.hero-btn {
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
}

/* ==========================================================================
   Project Gallery
   ========================================================================== */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 4/3;
}

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-img {
    transform: scale(1.1);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-info h3 {
    color: hsl(var(--clr-text-light));
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.project-info p {
    color: rgba(255,255,255,0.8);
    transform: translateY(20px);
    transition: transform var(--transition-normal) 0.1s;
}

.project-card:hover .project-info h3,
.project-card:hover .project-info p {
    transform: translateY(0);
}

/* ==========================================================================
   Forms & Contact
   ========================================================================== */
.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-control {
    width: 100%;
    padding: 1rem;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    background-color: hsl(var(--clr-bg-main));
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: hsl(var(--clr-primary));
    box-shadow: 0 0 0 3px rgba(0, 82, 255, 0.1);
    background-color: hsl(var(--clr-bg-alt));
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: stretch;
}

.map-container {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    height: 100%;
    min-height: 400px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: hsl(var(--clr-secondary));
    color: hsl(var(--clr-text-light));
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    text-align: center;
}

.footer-logo {
    height: 120px;
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1) drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}

.footer p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 0.5rem;
}

.footer-divider {
    height: 1px;
    background-color: rgba(255,255,255,0.1);
    margin: var(--spacing-md) 0;
}

.footer-bottom {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.5);
}

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

.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);
}

/* Grid Layouts for features/services */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.feature-number {
    font-size: 4rem;
    font-weight: 900;
    color: rgba(0, 82, 255, 0.1);
    line-height: 1;
    margin-bottom: -1rem;
    position: relative;
    z-index: 0;
}

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

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

@media (max-width: 768px) {
    .header .nav-links {
        display: none;
    }

    .mobile-menu .nav-links {
        display: flex;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .header:not(.scrolled) {
        background: linear-gradient(to bottom, rgba(0,0,0,0.6), transparent);
    }
}

/* Hide reCAPTCHA Badge */
.grecaptcha-badge { visibility: hidden !important; }