/* ============================================================
   Boğaziçi Grup — Design System
   ============================================================ */

:root {
  --primary-900: #0A2540;
  --primary-800: #0C2E50;
  --primary-700: #0F3960;
  --primary-600: #154A7E;
  --primary-500: #1E5A9E;
  --primary-400: #4A86C7;
  --primary-300: #6FAFE0;
  --primary-200: #A8CDED;
  --primary-100: #E5F0FA;
  --primary-50:  #F4F9FD;

  --secondary-700: #0E8388;
  --secondary-500: #2EAFB4;
  --secondary-300: #7FCDD0;

  --accent-500: #F59E0B;
  --accent-600: #D88A06;
  --accent-700: #B45309;
  --accent-100: #FEF3C7;

  --success: #10B981;
  --warning: #F59E0B;
  --danger:  #EF4444;

  --neutral-50:  #FAFBFC;
  --neutral-100: #F3F5F8;
  --neutral-200: #E5E9EF;
  --neutral-300: #CBD2DC;
  --neutral-400: #94A1B2;
  --neutral-500: #64748B;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1E293B;
  --neutral-900: #0F172A;

  --bg: #FFFFFF;
  --bg-soft: var(--neutral-50);
  --bg-muted: var(--neutral-100);
  --bg-deep: var(--primary-900);

  --text: var(--neutral-900);
  --text-soft: var(--neutral-600);
  --text-muted: var(--neutral-500);
  --text-on-deep: #FFFFFF;
  --text-on-deep-soft: rgba(255,255,255,0.72);

  --border: var(--neutral-200);
  --border-strong: var(--neutral-300);

  --font-display: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;

  --shadow-sm: 0 1px 2px rgba(15,23,42,0.05);
  --shadow-md: 0 4px 12px rgba(15,23,42,0.08), 0 1px 3px rgba(15,23,42,0.04);
  --shadow-lg: 0 12px 32px rgba(15,23,42,0.12), 0 2px 6px rgba(15,23,42,0.06);
  --shadow-xl: 0 24px 48px rgba(15,23,42,0.16), 0 4px 12px rgba(15,23,42,0.08);
  --shadow-amber: 0 8px 24px rgba(245,158,11,0.32);

  --container: 1280px;
  --header-h: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--neutral-900);
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  font-size: inherit;
}

/* Layout */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-lg { padding: 128px 0; }

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-lg { padding: 80px 0; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.005em;
  transition: all 0.18s ease;
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
  font-family: var(--font-body);
}
.btn-lg { padding: 17px 32px; font-size: 16px; }
.btn-sm { padding: 10px 16px; font-size: 14px; }

.btn-primary {
  background: var(--accent-500);
  color: var(--primary-900);
  font-weight: 700;
}
.btn-primary:hover {
  background: var(--accent-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow-amber);
}

.btn-deep {
  background: var(--primary-900);
  color: white;
}
.btn-deep:hover {
  background: var(--primary-700);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--primary-900);
  background: var(--primary-50);
}

.btn-ghost-light {
  background: rgba(255,255,255,0.08);
  color: white;
  border: 1px solid rgba(255,255,255,0.24);
  backdrop-filter: blur(8px);
}
.btn-ghost-light:hover {
  background: rgba(255,255,255,0.16);
  border-color: rgba(255,255,255,0.4);
}

/* Eyebrow */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--secondary-700);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--secondary-700);
}
.eyebrow-light { color: var(--secondary-300); }
.eyebrow-light::before { background: var(--secondary-300); }

/* Chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: var(--neutral-100);
  color: var(--neutral-700);
  border: 1px solid var(--border);
}

/* Cards */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  transition: all 0.2s ease;
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-500);
}

/* Type scale */
.h-display { font-size: clamp(40px, 6vw, 72px); font-weight: 800; }
.h-1 { font-size: clamp(36px, 5vw, 56px); }
.h-2 { font-size: clamp(28px, 3.5vw, 40px); }
.h-3 { font-size: clamp(22px, 2.5vw, 28px); }
.h-4 { font-size: 20px; }

.t-lead { font-size: 18px; line-height: 1.6; color: var(--text-soft); }
.t-body { font-size: 16px; line-height: 1.6; color: var(--text-soft); }
.t-small { font-size: 14px; color: var(--text-muted); }
.t-mono {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
  font-feature-settings: "tnum";
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}
.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--primary-900);
}
.header-logo-img {
  height: 40px;
  width: auto;
}
.header-logo-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-900), var(--primary-500));
  display: grid;
  place-items: center;
  color: white;
  font-weight: 800;
  font-family: var(--font-display);
  font-size: 18px;
  position: relative;
  overflow: hidden;
}
.header-logo-mark::after {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 8px;
  background: linear-gradient(135deg, transparent 50%, rgba(255,255,255,0.18));
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.header-nav a {
  padding: 8px 14px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--neutral-700);
  border-radius: 8px;
  transition: all 0.15s ease;
  position: relative;
}
.header-nav a:hover { color: var(--primary-900); background: var(--neutral-100); }
.header-nav a.active { color: var(--primary-900); }
.header-nav a.active::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px;
  bottom: -2px;
  height: 2px;
  background: var(--accent-500);
  border-radius: 2px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-900);
  padding: 8px 12px;
  border-radius: 8px;
}
.header-phone:hover { background: var(--primary-50); }

.nav-item { position: relative; }
.nav-item > a { display: inline-flex; align-items: center; }
.nav-item:hover .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown {
  position: absolute; top: calc(100% + 8px); left: 0;
  min-width: 220px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0; visibility: hidden;
  transform: translateY(-4px);
  transition: all 0.18s ease;
  z-index: 50;
}
.nav-dropdown a {
  display: block; padding: 10px 12px; border-radius: 8px;
  font-size: 14px; color: var(--neutral-700);
}
.nav-dropdown a:hover { background: var(--primary-50); color: var(--primary-900); }
.ml-1 { margin-left: 4px; }

.mobile-menu-btn { display: none; padding: 8px; }
@media (max-width: 980px) {
  .header-nav, .header-phone { display: none; }
  .mobile-menu-btn { display: grid; place-items: center; }
  .header-actions .btn-primary { display: none; }
}

.mobile-menu {
  position: fixed; inset: 0; background: white; z-index: 200;
  padding: 24px; display: none; flex-direction: column;
}
.mobile-menu.open { display: flex; }
.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
.mobile-menu nav { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu nav a {
  padding: 16px 12px; font-size: 18px; font-weight: 600; color: var(--neutral-900);
  border-bottom: 1px solid var(--border);
}

/* Footer */
.footer {
  background: var(--primary-900);
  color: var(--text-on-deep-soft);
  padding: 80px 0 32px;
  position: relative;
  overflow: hidden;
}
.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 0%, rgba(46,175,180,0.08), transparent 40%),
    radial-gradient(circle at 80% 100%, rgba(245,158,11,0.06), transparent 40%);
  pointer-events: none;
}
.footer-inner { position: relative; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
}
@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 540px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer h5 {
  color: white;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.footer-list { display: flex; flex-direction: column; gap: 10px; list-style: none; padding: 0; margin: 0; }
.footer-list a { font-size: 14px; transition: color 0.15s; }
.footer-list a:hover { color: white; }
.footer-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; }
.footer-bottom {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  flex-wrap: wrap;
  gap: 16px;
}
.footer-bottom-links { display: flex; gap: 20px; }

.footer-social {
  display: flex; gap: 10px; margin-top: 24px;
}
.footer-social a {
  width: 38px; height: 38px; border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  display: grid; place-items: center; color: rgba(255,255,255,0.7);
  transition: all 0.15s;
}
.footer-social a:hover {
  background: rgba(255,255,255,0.12);
  color: white;
}

/* Utility */
.divider { height: 1px; background: var(--border); }
.scroll-fade-mask {
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}

.kpi-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-feature-settings: "tnum";
  letter-spacing: -0.03em;
  line-height: 1;
}

:focus-visible {
  outline: 2px solid var(--accent-500);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* SVG icon helper */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.icon svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ===== Page hero (sub-pages) ===== */
.page-hero {
  background: linear-gradient(180deg, var(--primary-900), var(--primary-800));
  color: white;
  padding: 64px 0 80px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 90% 20%, rgba(46,175,180,0.18), transparent 40%),
    radial-gradient(circle at 10% 100%, rgba(245,158,11,0.10), transparent 40%);
  pointer-events: none;
}
.page-hero-inner { position: relative; }
.hero-title {
  color: white;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1;
}
.hero-accent {
  background: linear-gradient(120deg, var(--accent-500), #FCD34D);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  flex-wrap: wrap;
}
.breadcrumb a {
  color: rgba(255,255,255,0.6);
  transition: color 0.15s;
}
.breadcrumb a:hover { color: white; }
.breadcrumb-sep {
  color: rgba(255,255,255,0.3);
}

/* ===== Brand chips ===== */
.chip-brand-po { background: #FEF3C7; color: #B45309; border-color: #FDE68A; }
.chip-brand-alpet { background: #DBEAFE; color: #1E40AF; border-color: #BFDBFE; }
.chip-brand-aytemiz { background: #D1FAE5; color: #065F46; border-color: #A7F3D0; }

/* ===== Station markers (shared across pages) =====
   The wrapper element receives MapLibre's positioning transform — DO NOT add CSS transform here,
   it would override the map's positioning. Rotate is on the inner pin.
   Hover/active scaling is applied to the inner pin instead. */
.station-marker {
  width: 28px;
  height: 36px;
  cursor: pointer;
  /* No position rule — let MapLibre's .maplibregl-marker { position: absolute } take effect.
     Setting position:relative here would break MapLibre's transform-based positioning. */
}
.station-marker-pin {
  position: absolute;
  top: 0; left: 50%;
  width: 28px; height: 28px;
  margin-left: -14px;
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  transform-origin: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  border: 2px solid white;
  transition: transform 0.18s ease;
}
.station-marker-pin::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: white;
  border-radius: 50%;
}
.station-marker-pin.brand-po { background: #F59E0B; }
.station-marker-pin.brand-alpet { background: #1E5A9E; }
.station-marker-pin.brand-aytemiz { background: #10B981; }
.station-marker:hover .station-marker-pin,
.station-marker.active .station-marker-pin {
  transform: rotate(-45deg) scale(1.2);
  z-index: 10;
}

/* ===== Quote mark ===== */
.quote-mark {
  position: absolute;
  top: -28px; right: 32px;
  font-family: var(--font-display);
  font-size: 120px;
  line-height: 1;
  color: var(--accent-500);
  opacity: 0.3;
  font-weight: 800;
}
.testimonial-quote {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.45;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--neutral-900);
}

/* ===== CTA banner (shared with home) ===== */
.cta-banner {
  position: relative;
  border-radius: var(--r-2xl);
  overflow: hidden;
  background: var(--primary-900);
  color: white;
}
.cta-banner-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 50%, rgba(245,158,11,0.32), transparent 50%),
    radial-gradient(circle at 0% 100%, rgba(46,175,180,0.24), transparent 50%);
}
.cta-banner-bg::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at right center, black 30%, transparent 70%);
}
.cta-banner-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  padding: 80px;
  align-items: center;
}
@media (max-width: 880px) {
  .cta-banner-inner { grid-template-columns: 1fr; padding: 48px 32px; }
}
.cta-actions { display: flex; flex-direction: column; gap: 12px; }
@media (max-width: 540px) { .cta-actions { flex-direction: row; flex-wrap: wrap; } }