/**
 * Portfolio Website Styles
 * Coded by Mustafa Baran KESGİN
 * Created: 2025-06-28
 */

/* CSS Reset ve Temel Ayarlar */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Gece Modu Renkleri (Varsayılan) */
    --primary-bg: #0a0a0a;
    --secondary-bg: #1a1a1a;
    --card-bg: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --accent-color: #00d4ff;
    --accent-hover: #00b8e6;
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* Gündüz Modu Renkleri */
[data-theme="light"] {
    --primary-bg: #ffffff;
    --secondary-bg: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #5a6c7d;
    --text-muted: #95a5a6;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --border-color: #e1e8ed;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* Temel Tipografi */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--primary-bg);
    transition: all 0.3s ease;
    overflow-x: hidden;
}

/* Başlık Stilleri */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* Paragraf ve Metin */
p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Container ve Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

/* Flexbox Utilities */
.d-flex { display: flex; }
.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-around { justify-content: space-around; }
.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-items-end { align-items: flex-end; }
.flex-wrap { flex-wrap: wrap; }

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
.col-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }
.col-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
.col-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
.col-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
.col-9 { flex: 0 0 75%; max-width: 75%; }
.col-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
.col-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
.col-12 { flex: 0 0 100%; max-width: 100%; }

/* Header Stilleri */
.header {
    background: var(--secondary-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(26, 26, 26, 0.95);
    box-shadow: 0 2px 20px var(--shadow-color);
}

[data-theme="light"] .header.scrolled {
    background: rgba(248, 249, 250, 0.95);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    min-height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-color);
    background: rgba(0, 212, 255, 0.1);
    text-decoration: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--accent-color);
    color: white;
    transform: scale(1.1);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 5px 20px var(--shadow-color);
}

.mobile-menu.active {
    display: block;
}

.mobile-nav-menu {
    list-style: none;
    padding: 1rem 0;
}

.mobile-nav-menu .nav-link {
    display: block;
    padding: 1rem 2rem;
    border-radius: 0;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.1;
    z-index: 1;
}

.hero-content {
    text-align: center;
    z-index: 2;
    position: relative;
    max-width: 800px;
    padding: 2rem;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease 0.4s both;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-accent);
    color: white;
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
    color: white;
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

.btn-outline:hover {
    background: var(--accent-color);
    color: white;
    text-decoration: none;
}

.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.6s both;
}

/* Sections */
.section {
    padding: 5rem 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    transform: translateX(-50%);
    border-radius: 2px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 2rem;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px var(--shadow-color);
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px var(--shadow-color);
}

.card-icon {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
    display: block;
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
    text-align: center;
}

.footer-content {
    margin-bottom: 2rem;
}

.footer-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-3px);
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

/* Responsive Design */
@media (max-width: 768px) {
    html { font-size: 14px; }
    
    .container { padding: 0 15px; }
    
    .nav-menu { display: none; }
    .mobile-menu-toggle { display: block; }
    
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.2rem; }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.5rem; }
    
    .btn-group {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .row {
        margin: 0 -10px;
    }
    
    .col {
        padding: 0 10px;
    }
    
    .col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
    .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
        flex: 0 0 100%;
        max-width: 100%;
        margin-bottom: 1rem;
    }
    
    .section { padding: 3rem 0; }
    
    .card { margin-bottom: 2rem; }
    
    .social-links {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    html { font-size: 12px; }
    
    .container { padding: 0 10px; }
    
    .hero-content { padding: 1rem; }
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }
    
    .navbar { padding: 0.5rem 0; }
    
    .card { padding: 1.5rem; }
    
    .section { padding: 2rem 0; }
}

/* Print Styles */
@media print {
    .header,
    .mobile-menu,
    .theme-toggle,
    .btn {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .section {
        page-break-inside: avoid;
    }
}