/* ============================================
   EMIRHAN GÖL - PORTFOLIO
   Aurora Borealis Theme
   ============================================ */

:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a2e;
    --accent-cyan: #00d9ff;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --accent-blue: #3b82f6;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Gradients */
    --gradient-aurora: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan), var(--accent-pink));
    --gradient-text: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    
    /* Shadows */
    --shadow-glow: 0 0 30px rgba(0, 217, 255, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Fonts */
    --font-primary: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

/* ============================================
   BASE STYLES
   ============================================ */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

::selection {
    background: var(--accent-cyan);
    color: var(--bg-primary);
}

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

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

/* ============================================
   AURORA BACKGROUND
   ============================================ */

.aurora-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.aurora-gradient {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(168, 85, 247, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 40% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    animation: auroraMove 20s ease-in-out infinite;
}

@keyframes auroraMove {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(2%, -2%) rotate(1deg);
    }
    50% {
        transform: translate(-1%, 2%) rotate(-1deg);
    }
    75% {
        transform: translate(-2%, -1%) rotate(0.5deg);
    }
}

.stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.4), transparent),
        radial-gradient(2px 2px at 130px 80px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 160px 120px, rgba(255,255,255,0.3), transparent);
    background-repeat: repeat;
    background-size: 200px 200px;
    animation: starsTwinkle 4s ease-in-out infinite;
}

@keyframes starsTwinkle {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ============================================
   NAVBAR
   ============================================ */

.navbar {
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    box-shadow: var(--shadow-card);
}

.navbar-brand {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.brand-code {
    color: var(--accent-cyan);
    opacity: 0.7;
}

.brand-name {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    position: relative;
    transition: var(--transition);
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-aurora);
    transition: var(--transition);
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--text-primary) !important;
}

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

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 10px;
}

.lang-btn:hover {
    color: var(--text-secondary);
}

.lang-btn.active {
    color: var(--accent-cyan);
    background: rgba(0, 217, 255, 0.1);
}

.lang-divider {
    color: var(--glass-border);
}

/* Mobile Toggle */
.navbar-toggler {
    border: 1px solid var(--glass-border);
    padding: 0.5rem;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 2px var(--accent-cyan);
}

/* ============================================
   GLASS CARD
   ============================================ */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    transition: var(--transition);
}

.glass-card:hover {
    border-color: rgba(0, 217, 255, 0.3);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
}

.hero-content {
    max-width: 800px;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease 0.2s forwards;
}

.hero-title .highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease 0.4s forwards;
}

.typing-text {
    font-family: var(--font-mono);
    color: var(--accent-purple);
    position: relative;
}

.typing-text::after {
    content: '|';
    animation: blink 1s infinite;
    color: var(--accent-cyan);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease 0.6s forwards;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease 0.8s forwards;
}

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

/* Buttons */
.btn-primary-glow {
    background: var(--gradient-aurora);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    font-weight: 600;
    border-radius: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--transition-slow);
}

.btn-primary-glow:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    color: white;
}

.btn-primary-glow:hover::before {
    left: 100%;
}

.btn-outline-glow {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--glass-border);
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: 30px;
    transition: var(--transition);
}

.btn-outline-glow:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-3px);
}

/* Hero Social */
.hero-social {
    display: flex;
    gap: 1rem;
    margin-top: 3rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease 1s forwards;
}

.hero-social a {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: var(--transition);
}

.hero-social a:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-3px);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
}

/* ============================================
   SKILLS SECTION
   ============================================ */

.skills-section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
}

.section-title .highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 3rem;
}

.skill-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.skill-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.skill-badge i {
    font-size: 1.2rem;
}

.skill-badge:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.2);
}

/* Skill icon colors */
.skill-badge.csharp i { color: #68217a; }
.skill-badge.dotnet i { color: #512bd4; }
.skill-badge.js i { color: #f7df1e; }
.skill-badge.ts i { color: #3178c6; }
.skill-badge.react i { color: #61dafb; }
.skill-badge.vue i { color: #4fc08d; }
.skill-badge.node i { color: #339933; }
.skill-badge.python i { color: #3776ab; }
.skill-badge.sql i { color: #00758f; }
.skill-badge.git i { color: #f05032; }
.skill-badge.docker i { color: #2496ed; }
.skill-badge.azure i { color: #0089d6; }

/* ============================================
   ABOUT SECTION
   ============================================ */

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

@media (max-width: 991px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.about-image {
    position: relative;
}

.about-image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
}

.about-image-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-aurora);
    opacity: 0.3;
    z-index: 1;
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    filter: grayscale(20%);
    transition: var(--transition);
}

.about-image-wrapper:hover img {
    filter: grayscale(0%);
    transform: scale(1.05);
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

/* Timeline */
.timeline {
    margin-top: 3rem;
}

.timeline-item {
    position: relative;
    padding-left: 30px;
    padding-bottom: 2rem;
    border-left: 2px solid var(--glass-border);
}

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

.timeline-item::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gradient-aurora);
    box-shadow: 0 0 15px rgba(0, 217, 255, 0.5);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 0.25rem;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.timeline-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

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

.project-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.filter-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 0.5rem 1.25rem;
    border-radius: 20px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0, 217, 255, 0.1);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    border-color: rgba(0, 217, 255, 0.3);
    transform: translateY(-10px);
    box-shadow: var(--shadow-glow);
}

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 10, 15, 0.9), transparent);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 1.5rem;
    opacity: 0;
    transition: var(--transition);
}

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

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

.project-link {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.1rem;
    transition: var(--transition);
}

.project-link:hover {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: var(--bg-primary);
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

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

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: 15px;
    color: var(--accent-cyan);
}

/* ============================================
   CONTACT SECTION
   ============================================ */

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

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-title {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contact-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.contact-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    min-width: 150px;
    transition: var(--transition);
}

.contact-link:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.contact-link i {
    font-size: 2rem;
    color: var(--accent-cyan);
}

.contact-link span {
    font-weight: 500;
    color: var(--text-primary);
}

/* Contact Form (Optional) */
.contact-form {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* ============================================
   FOOTER
   ============================================ */

.eg-footer {
    padding: 60px 0 30px;
    border-top: 1px solid var(--glass-border);
    background: rgba(10, 10, 15, 0.5);
}

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

.footer-brand {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.footer-tagline {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

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

.footer-social .social-link {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: var(--transition);
}

.footer-social .social-link:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   SCROLL TO TOP
   ============================================ */

.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-aurora);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   PAGE HEADER
   ============================================ */

.page-header {
    padding: 150px 0 80px;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .hero-section {
        padding: 100px 0 60px;
    }

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

    .hero-buttons {
        flex-direction: column;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .contact-link {
        width: 100%;
        max-width: 300px;
    }

    .lang-toggle {
        margin-top: 1rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glow-text {
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
}

.mb-6 {
    margin-bottom: 4rem;
}

/* Animation classes for scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Card hover glow effect */
.hover-glow {
    transition: var(--transition);
}

.hover-glow:hover {
    box-shadow: 
        0 0 20px rgba(0, 217, 255, 0.2),
        0 0 40px rgba(168, 85, 247, 0.1);
}