/* ============================================
   Salih Camcı Portfolio - Modern CSS
   ============================================ */

/* ============================================
   CSS Variables & Root Styles
   ============================================ */
:root {
    --primary-blue: #2D6CDF;
    --primary-dark: #1E40AF;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --bg-white: #FFFFFF;
    --bg-subtle: #F9FAFB;
    --bg-gray: #F3F4F6;
    --success: #10B981;
    --warning: #F59E0B;
    --purple: #8B5CF6;
    --red: #EF4444;
    --border-gray: #E5E7EB;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Global Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

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

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

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-gray);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: 'Sora', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.nav-logo:hover {
    color: var(--primary-blue);
}

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

.nav-link {
    position: relative;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-blue);
}

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

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-left: 1rem;
}

.lang-btn {
    border: 1px solid var(--border-gray);
    background: var(--bg-white);
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0.35rem 0.55rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    color: var(--primary-blue);
    border-color: rgba(45, 108, 223, 0.35);
}

.lang-btn.active {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

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

.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--border-gray);
    box-shadow: var(--shadow-lg);
    padding: 1rem 2rem;
}

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

.mobile-nav-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.mobile-nav-link:hover {
    background: var(--bg-subtle);
    color: var(--primary-blue);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, rgba(45, 108, 223, 0.05) 0%, rgba(255, 255, 255, 0.95) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(45, 108, 223, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    z-index: 1;
}

.hero-subtitle {
    color: var(--primary-blue);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: white;
    border-radius: 50px;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.badge-dot.green {
    background: var(--success);
}

.badge-dot.blue {
    background: var(--primary-blue);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(45, 108, 223, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: white;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

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

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-subtitle {
    color: var(--primary-blue);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

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

.tag {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.tag-blue {
    background: rgba(45, 108, 223, 0.1);
    color: var(--primary-blue);
}

.tag-green {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.tag-purple {
    background: rgba(139, 92, 246, 0.1);
    color: var(--purple);
}

.tag-gray {
    background: var(--bg-gray);
    color: var(--text-secondary);
}

/* ============================================
   Grid Layouts
   ============================================ */
.grid {
    display: grid;
    gap: 2rem;
}

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

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

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: 5rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-links {
    list-style: none;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: white;
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-content .social-links {
        justify-content: center;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }

    .lang-switcher {
        margin-left: auto;
        margin-right: 0.75rem;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem !important;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }

    .exp-hero-title {
        font-size: 2.5rem;
    }

    .exp-stats {
        gap: 0.75rem;
    }

    .exp-stat {
        padding: 0.9rem 1.1rem;
        min-width: 90px;
    }

    .exp-stat-num {
        font-size: 2rem;
    }
}

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

/* ============================================
   Experience Page Hero
   ============================================ */
.exp-hero {
    padding: 120px 0 4rem;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 55%, #2b1d6e 100%);
    position: relative;
    overflow: hidden;
}

.exp-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(45, 108, 223, 0.18) 0%, transparent 55%),
        radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.12) 0%, transparent 55%);
    pointer-events: none;
}

.exp-hero-subtitle {
    display: inline-block;
    background: rgba(45, 108, 223, 0.2);
    color: #93c5fd;
    border: 1px solid rgba(45, 108, 223, 0.35);
    padding: 0.4rem 1.25rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.exp-hero-title {
    font-size: 4rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1.25rem;
    line-height: 1.1;
    font-family: 'Sora', sans-serif;
}

.exp-hero-desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.65);
    max-width: 620px;
    margin: 0 auto 3rem;
    line-height: 1.75;
}

.exp-stats {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding-top: 2.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    position: relative;
    z-index: 1;
}

.exp-stat {
    text-align: center;
    padding: 1.25rem 1.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    min-width: 110px;
    transition: transform 0.3s ease, background 0.3s ease;
}

.exp-stat:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.08);
}

.exp-stat-num {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.4rem;
    font-family: 'Sora', sans-serif;
}

.exp-stat-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.55);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.75px;
}

/* Company badge in timeline cards */
.exp-company-badge {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Project Card Flex (button always at bottom)
   ============================================ */
.card-flex {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card-flex .card-tags {
    margin-bottom: 1rem;
}

.card-flex .btn-bottom {
    margin-top: auto;
}

/* ============================================
   Work History Timeline
   ============================================ */
.timeline {
    position: relative;
    padding-left: 2.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0.625rem;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom,
        var(--primary-blue) 0%,
        var(--success) 40%,
        var(--success) 65%,
        var(--purple) 100%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -2.125rem;
    top: 1.75rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: white;
    border: 3px solid var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(45, 108, 223, 0.15);
    z-index: 1;
}

.timeline-dot.dot-green {
    border-color: var(--success);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.15);
}

.timeline-dot.dot-purple {
    border-color: var(--purple);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15);
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-card {
    background: white;
    border-radius: 12px;
    padding: 1.75rem 2rem;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-blue);
    transition: all 0.3s ease;
}

.timeline-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-xl);
}

.timeline-card.border-green {
    border-left-color: var(--success);
}

.timeline-card.border-green-2 {
    border-left-color: var(--success);
}

.timeline-card.border-purple {
    border-left-color: var(--purple);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

.timeline-role {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.timeline-company {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-achievements {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.timeline-achievements li {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.timeline-achievements li .check {
    flex-shrink: 0;
    font-size: 1rem;
    margin-top: 0.1rem;
}

/* ============================================
   Certificate Card
   ============================================ */
.cert-card {
    display: flex;
    flex-direction: column;
}

.cert-card .cert-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--primary-blue);
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 1rem;
    transition: gap 0.2s ease;
}

.cert-card .cert-link:hover {
    gap: 0.7rem;
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.bg-white { background: var(--bg-white); }
.bg-subtle { background: var(--bg-subtle); }
.bg-gray { background: var(--bg-gray); }