/* ==========================================================================
   XYFION - PREMIUM STYLE ARCHITECTURE (VANILLA CSS)
   ========================================================================== */

/* 1. Kök Değişkenleri (Theme Variables) & Reset */
:root {
    /* Yazı Tipleri */
    --font-heading: 'Outfit', 'Plus Jakarta Sans', -apple-system, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;

    /* Geçiş Efektleri */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);

    /* Gölgeler & Kenarlıklar */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    /* Gelişmiş HSL Tasarım Renkleri (Dark Theme Varsayılan) */
    --bg-primary: #080c16;
    --bg-secondary: #0f1424;
    --bg-card: rgba(18, 24, 43, 0.7);
    --border-color: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(0, 242, 254, 0.25);
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-inverse: #080c16;
    
    --accent-cyan: #00f2fe;
    --accent-blue: #4facfe;
    --accent-purple: #bd34fe;
    --accent-magenta: #ff007f;
    
    --grad-primary: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    --grad-secondary: linear-gradient(135deg, #bd34fe 0%, #ff007f 100%);
    --grad-dark: linear-gradient(135deg, #0f1424 0%, #080c16 100%);
    --grad-glow: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, rgba(189, 52, 254, 0.05) 50%, transparent 100%);
    
    --glow-shadow-cyan: 0 0 25px rgba(0, 242, 254, 0.25);
    --glow-shadow-purple: 0 0 25px rgba(189, 52, 254, 0.25);
    
    --header-blur: saturate(180%) blur(12px);
    --header-bg: rgba(8, 12, 22, 0.75);
}

/* Light Theme Değişkenleri */
body.light-theme {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --border-color: rgba(0, 0, 0, 0.06);
    --border-hover: rgba(79, 172, 254, 0.4);
    
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --text-inverse: #ffffff;
    
    --accent-cyan: #0284c7;
    --accent-blue: #2563eb;
    --accent-purple: #7c3aed;
    --accent-magenta: #db2777;
    
    --grad-primary: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
    --grad-secondary: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
    --grad-dark: linear-gradient(135deg, #ffffff 0%, #f5f7fa 100%);
    --grad-glow: radial-gradient(circle, rgba(2, 132, 199, 0.08) 0%, rgba(124, 58, 237, 0.03) 50%, transparent 100%);
    
    --glow-shadow-cyan: 0 0 25px rgba(2, 132, 199, 0.15);
    --glow-shadow-purple: 0 0 25px rgba(124, 58, 237, 0.15);
    
    --header-bg: rgba(245, 247, 250, 0.85);
}

/* Sıfırlama (Reset) */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Header yüksekliği */
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Linkler ve Buton Reset */
a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    background: none;
    border: none;
    color: inherit;
}

button {
    cursor: pointer;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-sm);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-secondary);
    border: 2px solid var(--bg-primary);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue);
}

/* ==========================================================================
   2. Temel Arayüz Elementleri & Genel Sınıflar (Layout Utilities)
   ========================================================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin-right: auto;
    margin-left: auto;
    padding-right: 24px;
    padding-left: 24px;
}

.text-center { text-align: center; }
.mt-4 { margin-top: 1.5rem; }
.mt-1 { margin-top: 0.25rem; }
.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Premium Gradient Metin */
.gradient-text {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* Bölüm Başlıkları */
.section-header {
    margin-bottom: 60px;
}
.section-subtitle {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-cyan);
    margin-bottom: 12px;
    display: inline-block;
}
.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--text-main);
}
.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================================================
   3. Arka Plan Süslemeleri & Parıltılar (BG Glows)
   ========================================================================== */

.bg-glows {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: -2;
    pointer-events: none;
    min-height: 100vh;
}

.glow {
    position: absolute;
    border-radius: var(--radius-full);
    filter: blur(140px);
    opacity: 0.4;
    transition: opacity var(--transition-normal);
}

.glow-1 {
    top: -10%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--accent-cyan) 0%, transparent 70%);
}

.glow-2 {
    top: 40%;
    left: -20%;
    width: 70vw;
    height: 70vw;
    background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
    opacity: 0.3;
}

.glow-3 {
    bottom: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent-magenta) 0%, transparent 70%);
    opacity: 0.2;
}

.bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    opacity: 0.03;
    pointer-events: none;
    background-size: 50px 50px;
    background-image: 
        linear-gradient(to right, var(--text-main) 1px, transparent 1px),
        linear-gradient(to bottom, var(--text-main) 1px, transparent 1px);
}
body.light-theme .bg-grid {
    opacity: 0.05;
}

/* ==========================================================================
   4. Butonlar (Buttons)
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-primary {
    background: var(--grad-primary);
    color: var(--text-inverse);
    box-shadow: var(--glow-shadow-cyan);
}
.btn-primary:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
    box-shadow: 0 0 35px rgba(0, 242, 254, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

.btn-glow {
    position: relative;
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--accent-cyan);
    overflow: hidden;
    z-index: 1;
}
.btn-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--grad-primary);
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-normal);
}
.btn-glow:hover {
    color: var(--text-inverse);
    border-color: transparent;
    box-shadow: var(--glow-shadow-cyan);
    transform: translateY(-2px);
}
.btn-glow:hover::before {
    opacity: 1;
}

/* ==========================================================================
   5. Üst Bilgi / Header (Header & Navigation)
   ========================================================================== */

#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    transition: background-color var(--transition-normal), border-bottom var(--transition-normal), padding var(--transition-normal);
    padding: 20px 0;
}

#main-header.scrolled {
    background-color: var(--header-bg);
    backdrop-filter: var(--header-blur);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
}
.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-pulse {
    animation: pulse 2s infinite alternate;
}

@keyframes pulse {
    0% { r: 6; opacity: 0.6; fill: #00f2fe; }
    100% { r: 10; opacity: 1; fill: #f355ff; }
}

/* Navigasyon Menüsü */
.nav-menu {
    display: block;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-muted);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-main);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--grad-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Sağ Mod Alanı */
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.theme-toggle-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
}

/* Hamburger Buton */
.mobile-nav-toggle {
    display: none;
    z-index: 110;
    padding: 10px;
}

/* ==========================================================================
   6. Kahraman Bölümü (Hero Section)
   ========================================================================== */

.hero-section {
    padding-top: 180px;
    padding-bottom: 80px;
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 60px;
}

.badge-container {
    margin-bottom: 24px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--accent-cyan);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}
body.light-theme .hero-badge {
    background: rgba(2, 132, 199, 0.08);
    border-color: rgba(2, 132, 199, 0.2);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    line-height: 1.7;
    max-width: 600px;
}

.hero-actions-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero Görsel */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
}

/* Küre Efekti */
.orb-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 260px;
    height: 260px;
}

.orb {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-cyan) 0%, var(--accent-purple) 60%, var(--accent-magenta) 100%);
    filter: blur(20px);
    opacity: 0.65;
    animation: orbFloat 6s ease-in-out infinite alternate;
}

.orb-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: 1px dashed rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.ring-1 {
    width: 340px;
    height: 340px;
    animation: rotateRing 20s linear infinite;
}

.ring-2 {
    width: 420px;
    height: 420px;
    animation: rotateRing 30s linear infinite reverse;
}

.ring-3 {
    width: 500px;
    height: 500px;
    border-style: solid;
    border-color: rgba(255, 255, 255, 0.05);
}

@keyframes orbFloat {
    0% { transform: scale(1) translate(-2%, -2%); }
    100% { transform: scale(1.1) translate(2%, 2%); filter: blur(15px); }
}

@keyframes rotateRing {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Havada Uçan Kartlar */
.floating-card {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    backdrop-filter: var(--header-blur);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    z-index: 10;
}

.info-card-1 {
    top: 0;
    left: -40px;
    animation: float1 5s ease-in-out infinite alternate;
}

.info-card-2 {
    bottom: 20px;
    right: -40px;
    animation: float2 5s ease-in-out infinite alternate;
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: rgba(0, 242, 254, 0.1);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.info-card-2 .card-icon {
    background: rgba(189, 52, 254, 0.1);
    color: var(--accent-purple);
}

.card-text h4 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
}

.card-text p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

@keyframes float1 {
    0% { transform: translateY(0px) rotate(-2deg); }
    100% { transform: translateY(-15px) rotate(1deg); }
}

@keyframes float2 {
    0% { transform: translateY(0px) rotate(2deg); }
    100% { transform: translateY(-15px) rotate(-1deg); }
}

/* Hero İstatistik Barı */
.hero-stats-bar {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: var(--header-blur);
    padding: 30px 0;
    margin-top: 40px;
}

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

.stat-item {
    text-align: center;
    flex: 1;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-main);
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-plus {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent-cyan);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 60px;
    background: var(--border-color);
}

/* ==========================================================================
   7. Projelerimiz Bölümü (Projects Showcase)
   ========================================================================== */

.projects-section {
    padding: 100px 0;
    position: relative;
}

.project-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 10px 24px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    color: var(--text-main);
    border-color: var(--text-muted);
}

.filter-btn.active {
    background: var(--grad-primary);
    color: var(--text-inverse);
    border-color: transparent;
    box-shadow: var(--glow-shadow-cyan);
}

/* Proje Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.project-image-wrapper {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 15;
}

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

.project-card:hover .project-image {
    transform: scale(1.06);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(8, 12, 22, 0.6);
    backdrop-filter: blur(4px);
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-normal);
}

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

.project-action-btn {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-inverse);
    background: var(--grad-primary);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--glow-shadow-cyan);
}

.project-category-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(8, 12, 22, 0.7);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
    color: var(--text-main);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
}

.project-content {
    padding: 28px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-card-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-main);
}

.project-card-excerpt {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.6;
    flex-grow: 1;
}

.project-tech-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tech-tags span {
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

/* ==========================================================================
   8. Yetenekler / Hizmetlerimiz (Services Grid)
   ========================================================================== */

.services-section {
    padding: 100px 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

/* Spotlight Glowing Border */
.spotlight-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 0) var(--mouse-y, 0), rgba(255, 255, 255, 0.05), transparent 40%);
    z-index: 3;
    pointer-events: none;
}

.service-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 30px;
    position: relative;
}

.glow-cyan {
    background: rgba(0, 242, 254, 0.08);
    color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.05);
}

.glow-purple {
    background: rgba(189, 52, 254, 0.08);
    color: var(--accent-purple);
    box-shadow: 0 0 15px rgba(189, 52, 254, 0.05);
}

.glow-magenta {
    background: rgba(255, 0, 127, 0.08);
    color: var(--accent-magenta);
    box-shadow: 0 0 15px rgba(255, 0, 127, 0.05);
}

.service-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.service-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.6;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.service-list li {
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.text-cyan { color: var(--accent-cyan); }
.text-purple { color: var(--accent-purple); }
.text-magenta { color: var(--accent-magenta); }

/* ==========================================================================
   9. Hakkımızda Bölümü (About Us)
   ========================================================================== */

.about-section {
    padding: 100px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
    align-items: center;
}

.about-content .section-title {
    text-align: left;
}

.about-text {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.7;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 30px;
}

.about-feat-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.1);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.about-feat-item h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.about-feat-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* 3D Dönme Kübü (Spinning Cube Visual) */
.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 350px;
    position: relative;
}

.cube-container {
    width: 160px;
    height: 160px;
    perspective: 800px;
}

.spinning-cube {
    width: 100%;
    height: 100%;
    position: absolute;
    transform-style: preserve-3d;
    animation: spinCube 25s linear infinite;
}

.face {
    position: absolute;
    width: 160px;
    height: 160px;
    border: 2px solid var(--accent-cyan);
    background: rgba(8, 12, 22, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--accent-cyan);
    box-shadow: inset 0 0 20px rgba(0, 242, 254, 0.15);
}

.face.front  { transform: translateZ(80px); }
.face.back   { transform: rotateY(180deg) translateZ(80px); border-color: var(--accent-purple); color: var(--accent-purple); box-shadow: inset 0 0 20px rgba(189, 52, 254, 0.15); }
.face.right  { transform: rotateY(90deg) translateZ(80px); }
.face.left   { transform: rotateY(-90deg) translateZ(80px); border-color: var(--accent-purple); color: var(--accent-purple); box-shadow: inset 0 0 20px rgba(189, 52, 254, 0.15); }
.face.top    { transform: rotateX(90deg) translateZ(80px); }
.face.bottom { transform: rotateX(-90deg) translateZ(80px); }

@keyframes spinCube {
    0% { transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg); }
    100% { transform: rotateX(360deg) rotateY(720deg) rotateZ(360deg); }
}

/* ==========================================================================
   10. İletişim Bölümü (Contact Section)
   ========================================================================== */

.contact-section {
    padding: 100px 0;
    position: relative;
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 40px;
    align-items: stretch;
}

.contact-info {
    height: 100%;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.info-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 30px;
}

.info-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
    flex-grow: 1;
}

.info-detail-item {
    display: flex;
    gap: 20px;
    align-items: center;
}

.icon-box {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.1);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.detail-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.detail-value {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
}
a.detail-value:hover {
    color: var(--accent-cyan);
}

.social-links-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    margin-top: 40px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.social-links-wrapper {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: var(--text-inverse);
    background: var(--grad-primary);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--glow-shadow-cyan);
}

/* İletişim Formu */
.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-main);
}

.input-wrapper {
    position: relative;
    width: 100%;
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
    transition: color var(--transition-fast);
}
.input-wrapper.align-start .input-icon {
    top: 20px;
}

.form-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 14px 16px 14px 44px;
    border-radius: var(--radius-md);
    color: var(--text-main);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.05);
}

.form-input:focus + .input-icon {
    color: var(--accent-cyan);
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 18px;
    padding-right: 40px;
}
body.light-theme .form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
}

.form-textarea {
    resize: none;
}

/* Form Geri Bildirimi */
.form-feedback {
    margin-top: 15px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
}

.form-feedback.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #10b981;
}

.form-feedback.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

/* ==========================================================================
   11. Alt Bilgi (Footer)
   ========================================================================== */

.main-footer {
    background: #04060b;
    border-top: 1px solid var(--border-color);
    padding: 80px 0 0;
    color: var(--text-muted);
}
body.light-theme .main-footer {
    background: #e2e8f0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-logo-icon {
    width: 32px;
    height: 32px;
}

.footer-brand-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 300px;
}

.footer-links h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 24px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--text-main);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
}

.footer-bottom-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright {
    font-size: 0.85rem;
}

.footer-legal {
    display: flex;
    gap: 24px;
    font-size: 0.85rem;
}

.footer-legal a:hover {
    color: var(--text-main);
}

/* ==========================================================================
   12. Proje Detay Modal Penceresi (Interactive Modal)
   ========================================================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(4, 6, 11, 0.7);
    backdrop-filter: blur(12px);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    transition: opacity var(--transition-normal);
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 900px;
    max-height: calc(100vh - 48px);
    overflow: hidden;
    position: relative;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay:not(.hidden) .modal-card {
    transform: scale(1);
}

.modal-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: rgba(8, 12, 22, 0.6);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    z-index: 10;
    transition: all var(--transition-fast);
}

.modal-close-btn:hover {
    background: #ff007f;
    border-color: transparent;
    color: #ffffff;
    transform: rotate(90deg);
}

.modal-body-scroll {
    overflow-y: auto;
    max-height: calc(100vh - 48px);
}

.modal-header-hero {
    position: relative;
    height: 320px;
    overflow: hidden;
}

.modal-hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

.modal-title-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 40px;
    background: linear-gradient(to top, var(--bg-secondary) 0%, transparent 100%);
    display: flex;
    flex-direction: column;
    gap: 8px;
    justify-content: flex-end;
    height: 150px;
}

.modal-cat-badge {
    background: var(--accent-cyan);
    color: var(--text-inverse);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    width: fit-content;
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-main);
}

.modal-content {
    padding: 0 40px 40px;
}

.modal-layout-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
}

.modal-main-desc h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.modal-main-desc p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.modal-features-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 15px;
}

.modal-features-list li {
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.modal-features-list li i {
    color: var(--accent-cyan);
    margin-top: 4px;
}

.sidebar-info-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
}

.sidebar-info-card h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.sidebar-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
}

.sidebar-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.sidebar-value {
    font-size: 0.9rem;
    font-weight: 700;
}

.modal-tech-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 6px;
}

.modal-tech-badges span {
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

/* ==========================================================================
   13. Responsive Tasarım (Media Queries)
   ========================================================================== */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-visual {
        order: -1;
        height: 250px;
    }
}

@media (max-width: 768px) {
    /* Mobil Navigasyon Açılır Menüsü */
    .mobile-nav-toggle {
        display: block;
        position: relative;
    }
    
    .hamburger {
        display: block;
        position: relative;
        width: 24px;
        height: 2px;
        background: var(--text-main);
        transition: transform var(--transition-normal);
    }
    
    .hamburger::before, .hamburger::after {
        content: '';
        position: absolute;
        width: 24px;
        height: 2px;
        background: var(--text-main);
        transition: transform var(--transition-normal), top var(--transition-normal), bottom var(--transition-normal);
    }
    
    .hamburger::before { top: -8px; }
    .hamburger::after { bottom: -8px; }
    
    /* Mobil Aktif Hamburger */
    .mobile-nav-toggle[aria-expanded="true"] .hamburger {
        background: transparent;
    }
    
    .mobile-nav-toggle[aria-expanded="true"] .hamburger::before {
        transform: rotate(45deg);
        top: 0;
    }
    
    .mobile-nav-toggle[aria-expanded="true"] .hamburger::after {
        transform: rotate(-45deg);
        bottom: 0;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-secondary);
        border-left: 1px solid var(--border-color);
        box-shadow: -20px 0 40px rgba(0,0,0,0.4);
        padding: 120px 40px 40px;
        transform: translateX(100%);
        transition: transform var(--transition-normal);
        z-index: 105;
    }
    
    .nav-menu.open {
        transform: translateX(0);
    }
    
    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }
    
    .nav-link {
        font-size: 1.15rem;
    }
    
    /* Hero */
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions-btns {
        justify-content: center;
    }
    
    .hero-visual {
        height: 300px;
        margin-top: 30px;
    }
    
    .stats-grid {
        flex-direction: column;
        gap: 30px;
    }
    
    .stat-divider {
        width: 80%;
        height: 1px;
    }
    
    /* Grids */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    /* Modals */
    .modal-layout-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .modal-content {
        padding: 0 24px 30px;
    }
    
    .modal-title-overlay {
        padding: 24px;
    }
    
    .modal-title {
        font-size: 1.75rem;
    }
    
    .modal-header-hero {
        height: 220px;
    }
}