/* 📂 css/style.css - Production Ready V20.0 (Apple / Google Level UX) */

:root {
  /* High-end HealthTech Palette */
  --bg-black: #020617;
  --bg-deep: #030712;
  --bg-surface: #0f172a;
  --bg-card: #1e293b;
  
  --accent-primary: #38bdf8;
  --accent-secondary: #0284c7;
  --accent-glow: rgba(56, 189, 248, 0.4);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --nav-glass: rgba(2, 6, 23, 0.6);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.3);
  
  /* Apple-like Easing Curves */
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.1);
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { 
  scroll-behavior: smooth; 
  font-size: 16px; 
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-black);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

/* Custom Scrollbar (Premium Detail) */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 5%; }
.section-padding { padding: 8rem 0; }
.color-accent { color: var(--accent-primary) !important; }

/* ================== DYNAMIC NAVBAR ================== */
.navbar {
  position: fixed; top: 0; width: 100%; z-index: 1000;
  padding: 1.5rem 5%;
  background: transparent;
  transition: all 0.5s var(--ease-smooth);
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid transparent;
}

/* Scroll edildiğinde devreye giren cam efekti */
.navbar.is-scrolled {
  padding: 1rem 5%;
  background: var(--nav-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.nav-left, .nav-right { display: flex; align-items: center; gap: 2.5rem; }
.brand { display: flex; align-items: center; gap: 0.75rem; font-size: 1.25rem; font-weight: 800; color: #fff; letter-spacing: -0.02em;}
.nav-links { display: flex; gap: 2.5rem; }
.nav-links a { 
  color: var(--text-secondary); font-weight: 500; font-size: 0.95rem; 
  transition: color 0.3s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0%; height: 2px; 
  background: var(--accent-primary); transition: width 0.3s var(--ease-smooth); border-radius: 2px;
}
.nav-links a:hover { color: #fff; }
.nav-links a:hover::after { width: 100%; }

/* ================== BUTTONS (Magnetic & Glow Feel) ================== */
.btn {
  padding: 0.75rem 1.75rem; border-radius: 100px;
  font-weight: 600; cursor: pointer; border: none;
  transition: all 0.4s var(--ease-spring);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-size: 0.95rem; position: relative; overflow: hidden;
}
.btn:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 4px; }

.btn-glass { 
  background: rgba(255,255,255,0.03); color: #fff; border: 1px solid var(--border-glass); 
  backdrop-filter: blur(10px);
}
.btn-glass:hover { 
  background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.2); 
  transform: translateY(-2px);
}

.btn-primary { 
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); 
  color: #020617; box-shadow: 0 4px 15px rgba(2, 132, 199, 0.2); 
}
.btn-primary:hover { 
  transform: translateY(-3px); 
  box-shadow: 0 12px 25px rgba(2, 132, 199, 0.4); 
  filter: brightness(1.1);
}
.btn-lg { padding: 1.1rem 2.5rem; font-size: 1.05rem; }

/* ================== HERO SECTION ================== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center; background: radial-gradient(circle at top, rgba(15,23,42,0.8) 0%, var(--bg-black) 80%);
  padding: 8rem 5% 0; overflow: hidden;
}
.hero-content { position: relative; z-index: 10; max-width: 900px; padding-bottom: 150px; display: flex; flex-direction: column; align-items: center; width: 100%;}
.badge-premium { 
  background: rgba(56, 189, 248, 0.1); color: var(--accent-primary); 
  padding: 0.5rem 1.25rem; border-radius: 100px; font-size: 0.85rem; font-weight: 600; 
  margin-bottom: 2.5rem; border: 1px solid rgba(56, 189, 248, 0.2); 
  letter-spacing: 0.05em; text-transform: uppercase; display: flex; align-items: center; gap: 6px;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 900; line-height: 1.15; letter-spacing: -0.03em;
  background: linear-gradient(to bottom, #ffffff, #94a3b8);
  background-clip: text; -webkit-background-clip: text; color: transparent; margin-bottom: 1.5rem;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; width: 100%; flex-wrap: wrap; margin-top: 1rem;}

/* Trust Strip */
.trust-strip {
  display: flex; justify-content: center; gap: 3rem; flex-wrap: wrap; 
  margin-top: 4rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.05);
  opacity: 0.7; transition: opacity 0.3s;
}
.trust-strip:hover { opacity: 1; }
.trust-item {
  display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; font-weight: 600; 
  color: var(--text-secondary); letter-spacing: 0.05em; text-transform: uppercase;
}
.trust-item svg { color: var(--accent-primary); }

/* Ocean Waves */
.ocean-frame { position: absolute; bottom: -2px; left: 0; width: 100%; height: 35vh; min-height: 250px; pointer-events: none; z-index: 1; opacity: 0.8; }
.waves { width: 100%; height: 100%; display: block;}
.wave-parallax > use { animation: ocean-surge 20s cubic-bezier(.55,.5,.45,.5) infinite; }
.wave-layer.l1 { fill: rgba(56, 189, 248, 0.1); animation-delay: -2s; animation-duration: 8s; }
.wave-layer.l2 { fill: rgba(2, 132, 199, 0.15); animation-delay: -3s; animation-duration: 12s; }
.wave-layer.l3 { fill: rgba(15, 23, 42, 0.8); animation-delay: -4s; animation-duration: 16s; }
.wave-layer.l4 { fill: var(--bg-black); animation-delay: -5s; animation-duration: 22s; }
@keyframes ocean-surge { 0% { transform: translate3d(-90px,0,0); } 100% { transform: translate3d(85px,0,0); } }

/* ================== STATS & METRICS ================== */
.stats-section {
  background: rgba(2, 6, 23, 0.4); border-top: 1px solid var(--border-glass); border-bottom: 1px solid var(--border-glass);
  padding: 4rem 0; margin-bottom: 5rem;
}
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; text-align: center; }
.stat-number { font-size: 3rem; font-weight: 900; color: #fff; line-height: 1; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
.stat-number span { color: var(--accent-primary); }
.stat-label { font-size: 0.95rem; color: var(--text-secondary); font-weight: 500; }

/* ================== BENTO GRIDS (SPOTLIGHT EFFECT) ================== */
.section-header { text-align: center; margin-bottom: 4rem; }
.section-tag { color: var(--accent-primary); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.1em; margin-bottom: 1rem; display: block; text-transform: uppercase; }
.section-title { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 1rem; color: #fff;}

.bento-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; }

/* Spotlight Kapsayıcısı */
.bento-card, .process-box, .article-card { 
  background: var(--bg-card); border: 1px solid var(--border-glass); 
  border-radius: 32px; padding: 3rem; transition: transform 0.4s var(--ease-smooth), border-color 0.4s;
  position: relative; overflow: hidden;
}
/* JS ile tetiklenen ışık hüzmesi efekti */
.bento-card::before, .process-box::before, .article-card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px circle at var(--mouse-x) var(--mouse-y), rgba(56, 189, 248, 0.08), transparent 40%);
  opacity: 0; transition: opacity 0.4s; pointer-events: none; z-index: 0;
}
.bento-card:hover::before, .process-box:hover::before, .article-card:hover::before { opacity: 1; }
.bento-card:hover, .process-box:hover, .article-card:hover { 
  transform: translateY(-6px); border-color: rgba(56, 189, 248, 0.4); 
  box-shadow: 0 20px 40px rgba(0,0,0,0.4), 0 0 20px rgba(56, 189, 248, 0.1); 
}

.bento-main { grid-column: 1 / -1; background: radial-gradient(circle at bottom right, rgba(2, 132, 199, 0.2), var(--bg-card)); }
.bento-card > * { position: relative; z-index: 1; }
.bento-icon { width: 48px; height: 48px; border-radius: 12px; background: rgba(34, 211, 238, 0.1); display: flex; align-items: center; justify-content: center; margin-bottom: 1.5rem; color: var(--accent-primary); border: 1px solid rgba(34, 211, 238, 0.2); }
.bento-card h3 { font-size: 1.75rem; font-weight: 800; margin-bottom: 1rem; color: #fff;}

/* ================== VISION BENTO ================== */
.vision-bento-box {
  position: relative; border-radius: 32px; overflow: hidden;
  border: 1px solid var(--border-glass); box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  min-height: 450px; display: flex; align-items: center;
  background: var(--bg-surface); transition: transform 0.5s var(--ease-smooth);
}
.vision-bento-box:hover { transform: translateY(-5px); border-color: var(--border-hover); box-shadow: 0 30px 60px rgba(0,0,0,0.6); }
.vision-bg-image {
  position: absolute; inset: 0;
  background: url('https://images.unsplash.com/photo-1552664730-d307ca884978?q=80&w=1200&auto=format&fit=crop') center/cover;
  filter: blur(10px) brightness(0.25); transform: scale(1.05); z-index: 0; transition: transform 1.5s var(--ease-smooth);
}
.vision-bento-box:hover .vision-bg-image { transform: scale(1.1); }
.vision-glass-panel { position: relative; z-index: 1; padding: 4rem 5rem; max-width: 900px; }
.vision-tag { color: var(--accent-primary); font-size: 0.9rem; font-weight: 800; letter-spacing: 0.15em; margin-bottom: 1.5rem; text-transform: uppercase;}
.vision-text { font-size: clamp(1.25rem, 2.5vw, 1.8rem); font-weight: 500; line-height: 1.6; color: #fff; }

/* ================== PROCESS GRID ================== */
.process-bento-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.process-box { padding: 0; display: flex; flex-direction: column; }
.box-image-wrapper { position: relative; width: 100%; aspect-ratio: 4/3; overflow: hidden; border-bottom: 1px solid var(--border-glass); }
.box-image-wrapper img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s var(--ease-smooth); }
.process-box:hover .box-image-wrapper img { transform: scale(1.08); }
.box-content { padding: 2rem 1.5rem; display: flex; flex-direction: column; flex-grow: 1; position: relative; z-index: 1;}
.box-content h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 1rem; color: #fff; }

/* ================== PREMIUM FORMS (Login & Register Centralized) ================== */
.auth-layout-centered, .auth-layout {
  min-height: 100vh; display: flex; justify-content: center; align-items: center;
  padding: 120px 5% 60px 5%; position: relative; overflow: hidden;
  background: radial-gradient(circle at center, rgba(15, 23, 42, 0.8) 0%, var(--bg-black) 100%);
}
.ambient-glow { position: absolute; border-radius: 50%; filter: blur(120px); z-index: 0; pointer-events: none; }
.glow-cyan { top: 10%; right: 15%; width: 40vw; height: 40vw; background: rgba(34, 211, 238, 0.1); }
.glow-blue { bottom: 10%; left: 10%; width: 50vw; height: 50vw; background: rgba(14, 165, 233, 0.08); }

.auth-glass-panel, .auth-card-narrow {
  position: relative; z-index: 10; background: var(--bg-surface);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass); border-radius: 32px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.5), 0 0 40px rgba(34, 211, 238, 0.05);
}
.auth-glass-panel { width: 100%; max-width: 600px; padding: 3.5rem 4rem; }
.auth-card-narrow { width: 100%; max-width: 480px; padding: 3rem; }

.premium-input, .premium-select, .form-control {
  width: 100%; padding: 1rem 1.25rem; background: rgba(2, 6, 23, 0.5);
  border: 1px solid var(--border-glass); border-radius: 16px;
  color: #fff; font-size: 0.95rem; font-family: 'Inter', sans-serif; 
  transition: all 0.3s var(--ease-smooth); appearance: none;
}
.premium-select {
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat; background-position: right 1rem center; background-size: 1em; padding-right: 2.5rem;
}
.premium-input:focus, .premium-select:focus, .form-control:focus { 
  outline: none; border-color: var(--accent-primary); 
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.1); background: rgba(2, 6, 23, 0.8);
}
.premium-select option { background: var(--bg-surface); color: #fff; }

/* ================== PREMIUM MODALS V21.0 (Apple / Google UX) ================== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; z-index: 9999;
  transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1); padding: 20px;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }

.premium-modal {
  background: rgba(15, 23, 42, 0.65); /* Daha derin bir cam efekti */
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 32px; padding: 3rem 2.5rem; width: 100%; max-width: 480px;
  transform: scale(0.95) translateY(20px); 
  transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.1); /* Apple tarzı yaylanma */
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.8), inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  position: relative; overflow: hidden;
}
.modal-overlay.active .premium-modal { transform: scale(1) translateY(0); }

/* Arka plandaki modern ışık süzmesi */
.premium-modal::before {
  content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.15), transparent 50%);
  pointer-events: none; z-index: 0;
}

.modal-close {
  position: absolute; top: 20px; right: 20px; z-index: 10;
  background: rgba(255,255,255,0.05); border: 1px solid transparent; border-radius: 50%;
  width: 36px; height: 36px; color: var(--text-secondary); cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: all 0.3s;
}
.modal-close:hover { 
  background: rgba(255,255,255,0.1); color: #fff; 
  border-color: rgba(255,255,255,0.15); transform: rotate(90deg); 
}

.modal-header { text-align: center; margin-bottom: 2.5rem; position: relative; z-index: 1; }
.modal-header h3 { font-size: 1.75rem; font-weight: 800; color: #fff; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
.modal-header p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.5; }

.modal-options { display: flex; flex-direction: column; gap: 1rem; position: relative; z-index: 1; }

.modal-option-btn {
  display: flex; align-items: flex-start; gap: 1.25rem; padding: 1.5rem;
  background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.05);
  border-radius: 24px; color: #fff; text-decoration: none; 
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
  position: relative; overflow: hidden;
}
/* Buton içi hover ışık efekti */
.modal-option-btn::after {
  content: ''; position: absolute; inset: 0; background: radial-gradient(circle at center, rgba(56, 189, 248, 0.1), transparent); opacity: 0; transition: 0.4s; pointer-events: none;
}
.modal-option-btn:hover {
  background: rgba(255,255,255,0.05); border-color: var(--accent-primary);
  transform: translateY(-4px); box-shadow: 0 15px 30px rgba(0,0,0,0.3), 0 0 20px rgba(56, 189, 248, 0.15);
}
.modal-option-btn:hover::after { opacity: 1; }

.modal-option-icon {
  width: 52px; height: 52px; border-radius: 16px; 
  flex-shrink: 0; /* 🔥 KRİTİK ÇÖZÜM: İkonun sıkışıp küçülmesini engeller */
  display: flex; align-items: center; justify-content: center;
  background: rgba(34, 211, 238, 0.1); color: var(--accent-primary);
  border: 1px solid rgba(34, 211, 238, 0.2);
}

/* Uzman Butonu İçin Renk Farklılaştırması */
.modal-option-btn.expert-btn .modal-option-icon {
  background: rgba(2, 132, 199, 0.15); color: var(--accent-secondary); border-color: rgba(2, 132, 199, 0.3);
}
.modal-option-btn.expert-btn:hover { border-color: var(--accent-secondary); }

.modal-option-text { display: flex; flex-direction: column; gap: 0.25rem; }
.modal-option-text strong { font-size: 1.15rem; font-weight: 700; color: #fff; }
.modal-option-text span { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.4; }

/* ================== FOOTER ================== */
.footer { background: var(--bg-black); border-top: 1px solid var(--border-glass); padding: 6rem 0 2rem 0; }
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 4rem; margin-bottom: 5rem; }
.footer-info .brand { display: flex; align-items: center; gap: 0.75rem; font-size: 1.5rem; font-weight: 800; margin-bottom: 1rem; color: #fff; }
.footer-group h4 { color: #fff; margin-bottom: 1.5rem; font-weight: 700; letter-spacing: 0.05em; font-size: 0.95rem; text-transform: uppercase; }
.footer-group a { display: block; color: var(--text-secondary); margin-bottom: 1rem; transition: 0.3s; font-size: 0.95rem; font-weight: 500; }
.footer-group a:hover { color: var(--accent-primary); transform: translateX(4px); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1.5rem; padding-top: 2rem; border-top: 1px solid var(--border-glass); }

/* ================== MOBILE & SCROLL ANIMATIONS ================== */
.hamburger-btn { display: none; background: transparent; border: none; cursor: pointer; flex-direction: column; gap: 6px; padding: 0.5rem; z-index: 1002; }
.hamburger-btn .bar { width: 24px; height: 2px; background: #fff; transition: 0.3s; border-radius: 2px;}

.mobile-menu {
  position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
  background: rgba(2,6,23,0.98); backdrop-filter: blur(20px); z-index: 999;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  opacity: 0; visibility: hidden; transition: 0.4s var(--ease-smooth);
}
.mobile-menu.active { opacity: 1; visibility: visible; }
.mobile-nav-content { display: flex; flex-direction: column; gap: 2rem; text-align: center; width: 100%; padding: 0 10%;}
.mobile-nav-content a { font-size: 1.5rem; font-weight: 600; color: var(--text-secondary); transition: 0.3s;}

.fade-in-up { opacity: 0; transform: translateY(40px); transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth); }
.fade-in-up.visible { opacity: 1; transform: translateY(0); }

/* ================== RESPONSIVE MEDIA QUERIES ================== */
@media (max-width: 1200px) {
  .process-bento-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
  .vision-glass-panel { padding: 3rem; }
}
@media (max-width: 900px) {
  .hide-mobile { display: none !important; }
  .hamburger-btn { display: flex; }
  .trust-strip { gap: 1.5rem; }
  .bento-grid, .process-bento-grid { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; gap: 3rem; }
  .section-padding { padding: 5rem 0; }
  .vision-glass-panel { padding: 2.5rem 1.5rem; }
  .auth-glass-panel { padding: 2.5rem 2rem; border-radius: 24px; margin: 0 1rem; border: none; background: transparent; box-shadow: none;}
}
@media (max-width: 600px) {
  .hero-actions { flex-direction: column; width: 100%; max-width: 350px; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .stat-number { font-size: 2.5rem; }
}