/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #00d4aa;
    --primary-dark: #00b894;
    --primary-light: #55efc4;
    --accent: #0984e3;
    --bg-dark: #0a0e17;
    --bg-darker: #060a12;
    --bg-card: #111827;
    --bg-card-hover: #1a2332;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --text-light: #cbd5e1;
    --border: #1e293b;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

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

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.5px;
}

.logo-svg {
    width: 32px;
    height: 32px;
}

.logo-accent {
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    position: relative;
    padding: 4px 0;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
    border-radius: 2px;
}

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg-animation {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

.particle:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; animation-duration: 8s; }
.particle:nth-child(2) { top: 60%; left: 80%; animation-delay: 1s; animation-duration: 7s; }
.particle:nth-child(3) { top: 40%; left: 50%; animation-delay: 2s; animation-duration: 9s; }
.particle:nth-child(4) { top: 80%; left: 30%; animation-delay: 3s; animation-duration: 6s; }
.particle:nth-child(5) { top: 10%; left: 70%; animation-delay: 4s; animation-duration: 10s; }

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.3; }
    50% { transform: translate(30px, -30px) scale(1.5); opacity: 0.6; }
}

.circuit-line {
    position: absolute;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.08;
}

.cl1 { width: 300px; height: 1px; top: 30%; left: -50px; transform: rotate(15deg); animation: pulse-line 4s ease-in-out infinite; }
.cl2 { width: 400px; height: 1px; top: 60%; right: -100px; transform: rotate(-10deg); animation: pulse-line 5s ease-in-out infinite 1s; }
.cl3 { width: 250px; height: 1px; top: 80%; left: 20%; transform: rotate(5deg); animation: pulse-line 6s ease-in-out infinite 2s; }

@keyframes pulse-line {
    0%, 100% { opacity: 0.05; }
    50% { opacity: 0.15; }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 28px;
    animation: fadeInUp 0.6s ease;
}

.hero h1 {
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 550px;
    margin: 0 auto 36px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: var(--primary);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 170, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.stat {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
}

.stat-label {
    display: block;
    margin-top: 4px;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
    margin: 8px auto 0;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== SECTIONS ===== */
.section {
    padding: 100px 0;
}

.section-dark {
    background: var(--bg-darker);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.15);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 12px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 500px;
    margin: 0 auto;
}

/* ===== FEATURES ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 212, 170, 0.2);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(0, 212, 170, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== TECH GRID ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 20px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 28px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
    font-weight: 600;
    font-size: 0.9rem;
}

.tech-item:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.tech-icon-box {
    font-size: 1.5rem;
    color: var(--primary);
}

/* ===== PROJECTS ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

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

.project-card:hover {
    border-color: rgba(0, 212, 170, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, #0f1724, #1a2332);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-placeholder svg {
    width: 48px;
    height: 48px;
    color: var(--primary);
    opacity: 0.4;
}

.project-tag {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    background: rgba(0, 212, 170, 0.15);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
}

.project-content {
    padding: 24px;
}

.project-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.project-content p {
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.project-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.difficulty {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.difficulty.beginner {
    background: rgba(0, 212, 170, 0.1);
    color: var(--primary);
}

.difficulty.intermediate {
    background: rgba(9, 132, 227, 0.1);
    color: var(--accent);
}

.difficulty.advanced {
    background: rgba(214, 48, 49, 0.1);
    color: #e17055;
}

.project-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== VIDEOS ===== */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.video-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.video-card:hover {
    border-color: rgba(0, 212, 170, 0.3);
    transform: translateY(-4px);
}

.video-thumbnail {
    position: relative;
    height: 180px;
    background: linear-gradient(135deg, #0f1724, #1a2332);
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-button {
    width: 56px;
    height: 56px;
    background: rgba(0, 212, 170, 0.2);
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: var(--transition);
}

.play-button svg {
    width: 20px;
    height: 20px;
    margin-left: 3px;
}

.video-card:hover .play-button {
    background: var(--primary);
    color: var(--bg-dark);
    transform: scale(1.1);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    padding: 3px 8px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
}

.video-info {
    padding: 20px;
}

.video-info h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.video-info p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== CTA ===== */
.cta-section {
    background: var(--bg-darker);
}

.cta-box {
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.05), rgba(9, 132, 227, 0.05));
    border: 1px solid rgba(0, 212, 170, 0.15);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-box h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.cta-box > p {
    color: var(--text-muted);
    margin-bottom: 28px;
}

.cta-form {
    display: flex;
    gap: 12px;
    max-width: 420px;
    margin: 0 auto;
}

.cta-form input {
    flex: 1;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

.cta-form input:focus {
    border-color: var(--primary);
}

.cta-note {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 12px;
}

/* ===== CONTACT ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    background: rgba(0, 212, 170, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.contact-icon svg {
    width: 20px;
    height: 20px;
}

.contact-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.contact-item p {
    color: var(--text-muted);
    font-size: 0.88rem;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.social-link {
    width: 42px;
    height: 42px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: var(--transition);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.social-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 12px;
}

.footer-links h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.88rem;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .cta-form {
        flex-direction: column;
    }

    .cta-box {
        padding: 40px 24px;
    }

    .hero {
        padding: 100px 0 60px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        letter-spacing: -1px;
    }

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

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

/* ===== ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== PAGE HERO (Alt sayfalar) ===== */
.page-hero {
    padding: 120px 0 60px;
    text-align: center;
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border);
}

.page-hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -1px;
    margin-top: 12px;
    margin-bottom: 12px;
}

/* ===== FILTER BAR ===== */
.filter-bar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.filter-btn {
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: 0.2s;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--bg-dark);
    font-weight: 600;
}

/* ===== ACTIVE NAV LINK ===== */
.active-link {
    color: var(--primary) !important;
}

.active-link::after {
    width: 100% !important;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
    grid-column: 1 / -1;
}