/* Arda Demir Masterclass - Gelişmiş Tasarım Sistemi */
:root {
    --bg-dark: #020617;
    --primary: #818cf8; /* Purple */
    --primary-glow: rgba(129, 140, 248, 0.4);
    --secondary: #fb923c; /* Orange */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --glass: rgba(15, 23, 42, 0.6);
    --font-h: 'Outfit', sans-serif;
    --font-b: 'Inter', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; scroll-behavior: smooth; }

body { background: var(--bg-dark); color: var(--text-main); font-family: var(--font-b); overflow-x: hidden; line-height: 1.7; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }

/* Backgrounds */
.grid-background { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-image: radial-gradient(circle at 2px 2px, rgba(129, 140, 248, 0.05) 1px, transparent 0); background-size: 40px 40px; z-index: -1; }
.glow-effect { position: fixed; top: -10%; left: -10%; width: 120%; height: 120%; background: radial-gradient(circle at 50% 50%, var(--primary-glow) 0%, transparent 60%); z-index: -2; opacity: 0.5; }

/* Navbar */
.navbar { padding: 1.5rem 0; position: sticky; top: 0; z-index: 1000; background: rgba(2, 6, 23, 0.8); backdrop-filter: blur(15px); border-bottom: 1px solid var(--border); }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo img { height: 45px; }
.nav-links { display: flex; gap: 2.5rem; align-items: center; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-weight: 500; transition: 0.3s; font-size: 0.95rem; }
.nav-links a:hover { color: var(--primary); }

/* Buttons */
.cta-btn-primary { 
    background: linear-gradient(135deg, var(--primary), #6366f1);
    color: white; border: none; padding: 1.2rem 2.5rem; border-radius: 12px;
    font-family: var(--font-h); font-weight: 700; font-size: 1.1rem; cursor: pointer;
    box-shadow: 0 10px 30px rgba(129, 140, 248, 0.3); transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.cta-btn-primary:hover { transform: translateY(-5px) scale(1.02); box-shadow: 0 20px 40px rgba(129, 140, 248, 0.4); }

.cta-btn-primary.big {
    padding: 1.5rem 3.5rem;
    font-size: 1.3rem;
    letter-spacing: 1px;
}

.cta-btn-primary.small {
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
}

.cta-subtext {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.cta-btn.secondary { background: var(--border); color: white; border: 1px solid var(--border); padding: 0.7rem 1.5rem; border-radius: 10px; cursor: pointer; font-weight: 600; transition: 0.3s; }
.cta-btn.secondary:hover { background: var(--primary); border-color: var(--primary); }

/* Hero Section */
.hero { padding: 120px 0 80px; text-align: center; }
.hero-tag { background: rgba(129, 140, 248, 0.1); color: var(--primary); padding: 0.6rem 1.2rem; border-radius: 50px; display: inline-block; font-weight: 800; font-size: 0.8rem; letter-spacing: 2px; border: 1px solid var(--primary); margin-bottom: 2.5rem; }
.hero h1 { font-family: var(--font-h); font-size: 4.5rem; font-weight: 800; line-height: 1.1; margin-bottom: 2rem; letter-spacing: -2px; }
.hero .highlight { color: var(--primary); text-shadow: 0 0 20px rgba(129, 140, 248, 0.5); }
.hero-subtitle { font-size: 1.4rem; color: var(--text-muted); max-width: 850px; margin: 0 auto 3.5rem; line-height: 1.5; }
.hero-ctas { display: flex; justify-content: center; align-items: center; gap: 2.5rem; }
.secondary-info { color: white; text-decoration: none; font-weight: 600; font-size: 1.1rem; border-bottom: 2px solid var(--primary); padding-bottom: 3px; }

/* Brands Section */
.brands-section { padding: 60px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(255,255,255,0.02); }
.brands-title { text-align: center; font-size: 0.8rem; font-weight: 800; color: var(--text-muted); letter-spacing: 3px; margin-bottom: 3rem; }
.brands-grid { display: flex; justify-content: space-around; align-items: center; flex-wrap: wrap; gap: 3rem; }
.brand-item { display: flex; flex-direction: column; align-items: center; gap: 1rem; transition: 0.4s; grayscale: 100%; opacity: 0.6; }
.brand-item:hover { transform: scale(1.1); filter: grayscale(0%); opacity: 1; }
.brand-item img { height: 40px; width: auto; }
.brand-item span { font-size: 0.75rem; font-weight: 700; color: var(--text-main); }
.quantum-highlight { flex-direction: row; padding: 0.8rem 1.5rem; border: 1px solid rgba(129, 140, 248, 0.3); border-radius: 12px; background: rgba(129, 140, 248, 0.05); filter: none !important; opacity: 1 !important; transform: scale(1.05); gap: 0; }
.qol-text { font-family: var(--font-h); font-size: 1.3rem !important; font-weight: 900 !important; background: linear-gradient(135deg, #818cf8, #f8fafc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; letter-spacing: 1px; }

/* Video Section */
.video-section { padding: 80px 0; }
.video-container { position: relative; width: 100%; max-width: 500px; margin: 0 auto; aspect-ratio: 10 / 16; border-radius: 20px; overflow: hidden; border: 1px solid var(--primary); box-shadow: 0 20px 60px rgba(0,0,0,0.5); background: #000; }
.vsl-player { width: 100%; height: 100%; object-fit: cover; }
.video-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); display: flex; flex-direction: column; justify-content: center; align-items: center; cursor: pointer; z-index: 10; transition: 0.4s; }
.video-overlay.hidden { opacity: 0; pointer-events: none; }
.play-button { width: 80px; height: 80px; background: var(--primary); border-radius: 50%; display: flex; justify-content: center; align-items: center; margin-bottom: 1rem; }
.play-button svg { width: 35px; height: 35px; }
.overlay-text { font-family: var(--font-h); font-weight: 700; color: white; font-size: 1.2rem; }
.video-label { position: absolute; top: 20px; right: 20px; background: var(--primary); color: white; padding: 0.5rem 1rem; border-radius: 50px; font-weight: 800; font-size: 0.7rem; z-index: 20; }

.video-description { margin-top: 3rem; text-align: center; }
.badge.orange { background: var(--secondary); color: var(--bg-dark); padding: 0.4rem 1.2rem; border-radius: 6px; font-weight: 800; font-size: 0.8rem; display: inline-block; margin-bottom: 1.5rem; }
.video-description p { font-size: 1.6rem; font-weight: 700; font-family: var(--font-h); max-width: 800px; margin: 0 auto; }

/* Stats Section */
.stats-section { padding: 60px 0; background: rgba(255,255,255,0.02); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); text-align: center; }
.stat-card h3 { font-family: var(--font-h); font-size: 3.5rem; color: white; margin-bottom: 0.5rem; }
.stat-card p { color: var(--text-muted); font-size: 0.9rem; font-weight: 600; text-transform: uppercase; letter-spacing: 2px; }

/* Founder Section */
.founder-section { padding: 100px 0; }
.founder-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 5rem; align-items: center; }
.founder-image { position: relative; }
.founder-image img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; border-radius: 50%; border: 4px solid var(--primary); position: relative; z-index: 2; }
.image-glow { position: absolute; top: -10%; left: -10%; width: 120%; height: 120%; background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%); z-index: 1; opacity: 0.6; }
.founder-tag { color: var(--primary); font-weight: 800; font-size: 0.8rem; letter-spacing: 2px; }
.founder-info h2 { font-family: var(--font-h); font-size: 3.5rem; margin: 1rem 0 2rem; color: white; }
.founder-bio { font-size: 1.2rem; color: var(--text-muted); margin-bottom: 3.5rem; line-height: 1.9; }

/* Audience Section */
.audience-section {
    padding: 100px 0;
    background: rgba(15, 23, 42, 0.3);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.audience-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--glass);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.audience-card .check {
    color: var(--primary);
    font-weight: 900;
    font-size: 1.4rem;
    background: rgba(129, 140, 248, 0.1);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

/* Methodology Steps */
.methodology-section { padding: 120px 0; }
.section-title { font-family: var(--font-h); font-size: 3.5rem; font-weight: 800; text-align: center; margin-bottom: 5rem; letter-spacing: -1px; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3rem; }
.step-card { background: var(--glass); padding: 4rem 3rem; border-radius: 24px; border: 1px solid var(--border); position: relative; transition: 0.4s; overflow: hidden; }
.step-card:hover { border-color: var(--primary); transform: translateY(-10px); background: rgba(129, 140, 248, 0.05); }
.step-num { position: absolute; top: 20px; right: 30px; font-size: 4rem; font-weight: 900; opacity: 0.1; font-family: var(--font-h); color: var(--primary); }
.step-card h4 { font-family: var(--font-h); font-size: 1.8rem; margin-bottom: 1.5rem; color: var(--primary); }
.step-card p { color: var(--text-muted); font-size: 1.1rem; }

/* AI Tech Section */
.ai-section { padding: 100px 0; }
.glass-container { background: linear-gradient(135deg, rgba(129, 140, 248, 0.15), rgba(2, 6, 23, 0.9)); border: 1px solid var(--primary); border-radius: 40px; padding: 6rem 4rem; text-align: center; position: relative; }
.section-subtitle { font-size: 1.3rem; color: var(--text-muted); margin-top: -3rem; margin-bottom: 5rem; max-width: 800px; margin-inline: auto; }
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
.ai-tool-card { background: rgba(2, 6, 23, 0.6); border: 1px solid var(--border); padding: 3rem 2rem; border-radius: 24px; transition: 0.4s; }
.ai-tool-card:hover { border-color: var(--primary); background: rgba(129, 140, 248, 0.1); transform: scale(1.05); }
.ai-icon { font-size: 3rem; margin-bottom: 2rem; }
.ai-tool-card h4 { font-family: var(--font-h); font-size: 1.6rem; color: white; margin-bottom: 1rem; }

/* Curriculum Detailed */
.curriculum-detailed { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; margin-top: 5rem; text-align: left; }
.cur-card { background: var(--glass); padding: 3rem; border-radius: 24px; border: 1px solid var(--border); transition: 0.3s; }
.cur-card:hover { border-color: var(--primary); transform: translateY(-5px); }
.cur-card h4 { font-family: var(--font-h); font-size: 1.4rem; margin-bottom: 1rem; color: white; }
.cur-card p { color: var(--text-muted); line-height: 1.7; font-size: 1.05rem; }

.center-cta {
    text-align: center;
    margin-top: 5rem;
}

/* FAQ Section */
.faq-section { padding: 120px 0; }
.faq-header { text-align: center; margin-bottom: 4rem; }
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); padding: 2rem 0; }
.faq-question { display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-size: 1.3rem; font-weight: 700; transition: 0.3s; font-family: var(--font-h); }
.faq-question:hover { color: var(--primary); }
.faq-toggle { width: 30px; height: 30px; position: relative; }
.faq-toggle::before, .faq-toggle::after { content: ''; position: absolute; background: white; transition: 0.4s; }
.faq-toggle::before { width: 24px; height: 3px; top: 13px; left: 3px; }
.faq-toggle::after { width: 3px; height: 24px; left: 13px; top: 3px; }
.faq-item.active .faq-toggle::after { transform: rotate(90deg); opacity: 0; }
.faq-item.active .faq-toggle::before { background: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1); }
.faq-item.active .faq-answer { max-height: 300px; padding-top: 1.5rem; }
.faq-answer p { color: var(--text-muted); font-size: 1.15rem; }

/* Footer */
.footer { padding: 100px 0 60px; border-top: 1px solid var(--border); background: #010409; }
.footer-content { text-align: center; }
.footer-logo { height: 40px; margin-bottom: 2rem; }
.footer p { color: var(--text-muted); margin-bottom: 2rem; font-weight: 500; }
.footer-links { display: flex; justify-content: center; gap: 3rem; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: 0.3s; }
.footer-links a:hover { color: var(--primary); }

.instagram-icon { color: var(--text-muted); display: flex; align-items: center; justify-content: center; transition: 0.3s; }
.instagram-icon:hover { color: #E1306C; transform: scale(1.1); }
.nav-links .instagram-icon { margin-right: 10px; }
.footer-socials { display: flex; justify-content: center; margin-bottom: 2rem; }
.footer-socials .instagram-icon { width: 45px; height: 45px; background: rgba(255,255,255,0.05); border-radius: 50%; }
.footer-socials .instagram-icon:hover { background: rgba(225, 48, 108, 0.1); }

/* Modal */
.modal { display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%; background: rgba(2, 6, 23, 0.98); backdrop-filter: blur(20px); overflow: auto; }
.modal-content {
    background: #0f172a;
    margin: 5% auto;
    padding: 4rem;
    border: 1px solid var(--primary);
    border-radius: 32px;
    width: 95%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 0 100px var(--primary-glow);
}

.form-header {
    margin-bottom: 2.5rem;
}

.form-header h2 {
    color: var(--primary);
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

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

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

#lead-form input {
    width: 100%;
    padding: 1.2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: white;
    font-size: 1.1rem;
}

#lead-form input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.07);
}

#lead-form button {
    width: 100%;
    margin-top: 1.5rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero h1 { font-size: 3.5rem; }
    .steps-grid, .ai-grid { grid-template-columns: 1fr; gap: 2rem; }
    .curriculum-grid { grid-template-columns: 1fr; }
    .founder-grid { grid-template-columns: 1fr; text-align: center; }
    .founder-image { max-width: 400px; margin: 0 auto; }
}
@media (max-width: 768px) {
    .container { padding: 0 1.5rem; }
    .hero { padding: 60px 0 40px; }
    .hero h1 { font-size: 2.0rem; letter-spacing: -1px; }
    .hero-subtitle { font-size: 1.1rem; margin-bottom: 2rem; }
    .nav-links { display: none; }
    .navbar .container { justify-content: center; }
    .video-container { width: 100%; max-width: 350px; aspect-ratio: 10 / 16; }
    .hero-ctas { flex-direction: column; gap: 1rem; width: 100%; }
    .cta-btn-primary.big { width: 100%; padding: 1.2rem; font-size: 1.1rem; }
    .stats-grid { grid-template-columns: 1fr; gap: 2rem; }
    .founder-info h2 { font-size: 2.5rem; }
    .founder-bio { margin-bottom: 2rem; }
    .curriculum-detailed { grid-template-columns: 1fr; gap: 1.5rem; margin-top: 3rem; }
    .section-title { font-size: 2.2rem; margin-bottom: 2.5rem; }
    .brands-grid { gap: 2rem; flex-direction: column; }
    .footer-links { flex-direction: column; gap: 1rem; }
    .modal-content { padding: 2.5rem 1.5rem; margin: 20% auto; width: 90%; }
    .form-header h2 { font-size: 1.6rem; }
}