/* =========================================================
   Eren Karabin — Fizik Özel Ders
   Stil dosyası
   ========================================================= */

:root {
  --navy-900: #08152b;
  --navy-800: #0b1a30;
  --navy-700: #12294a;
  --navy-600: #1b3a63;

  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-100: #dbeafe;

  --amber-500: #f59e0b;
  --amber-100: #fef3c7;

  --green-500: #10b981;
  --green-100: #d1fae5;

  --purple-500: #8b5cf6;
  --purple-100: #ede9fe;

  --ink: #0f172a;
  --body: #475569;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f6f8fc;

  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 2px 8px rgba(15, 23, 42, .04);
  --shadow: 0 8px 30px rgba(15, 23, 42, .08);
  --shadow-lg: 0 24px 60px rgba(8, 21, 43, .16);

  --font-body: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-head: "Sora", var(--font-body);

  --wrap: 1160px;
  --header-h: 74px;
}

/* ---------- Reset / temel ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--ink);
  line-height: 1.18;
  margin: 0 0 .6em;
  letter-spacing: -.02em;
}

p { margin: 0 0 1em; }
a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.container { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }
.container.narrow { max-width: 820px; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--navy-800); color: #fff; padding: 12px 20px; border-radius: 0 0 12px 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--blue-500);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Butonlar ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 15px 28px;
  border: 0; border-radius: 999px;
  font: 600 16px/1 var(--font-body);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  text-decoration: none !important;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue-600), #1d4ed8);
  color: #fff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, .32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(37, 99, 235, .4); }
.btn-ghost {
  background: rgba(255, 255, 255, .08);
  color: #e8eefc;
  border: 1px solid rgba(255, 255, 255, .28);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .16); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--navy-800); box-shadow: var(--shadow); }
.btn-light:hover { transform: translateY(-2px); }
.btn-outline {
  background: #fff; color: var(--ink); border: 1.5px solid var(--line);
}
.btn-outline:hover { border-color: var(--blue-500); color: var(--blue-600); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  transition: background .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 1px 0 var(--line), 0 8px 24px rgba(15, 23, 42, .05);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }

.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none !important; }
.brand-mark {
  position: relative; width: 38px; height: 38px; flex: none;
  display: grid; place-items: center;
}
.nucleus {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--amber-500);
  box-shadow: 0 0 12px rgba(245, 158, 11, .8);
}
.ring {
  position: absolute; inset: 0;
  border: 1.6px solid currentColor;
  border-radius: 50%;
  color: var(--blue-500);
  opacity: .85;
}
.ring-1 { transform: rotate(35deg) scaleY(.42); }
.ring-2 { transform: rotate(-35deg) scaleY(.42); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-family: var(--font-head); font-size: 17px; color: #fff; letter-spacing: -.01em; }
.brand-text small { font-size: 12px; color: rgba(255, 255, 255, .62); letter-spacing: .04em; }
.site-header.scrolled .brand-text strong { color: var(--ink); }
.site-header.scrolled .brand-text small { color: var(--muted); }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 9px 14px; border-radius: 999px;
  font-size: 15px; font-weight: 600;
  color: rgba(255, 255, 255, .82);
  text-decoration: none !important;
  transition: background .2s ease, color .2s ease;
}
.nav a:hover, .nav a.active { background: rgba(255, 255, 255, .14); color: #fff; }
.site-header.scrolled .nav a { color: var(--body); }
.site-header.scrolled .nav a:hover,
.site-header.scrolled .nav a.active { background: var(--bg-alt); color: var(--blue-600); }
.nav a { white-space: nowrap; }

/* Telefon butonu menünün dışında — hiçbir genişlikte satır atlamaz */
.header-actions { display: flex; align-items: center; gap: 10px; flex: none; }
.header-call {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 999px;
  background: var(--blue-600); color: #fff !important;
  font: 700 15px/1 var(--font-body);
  text-decoration: none !important;
  white-space: nowrap;
  box-shadow: 0 6px 18px rgba(37, 99, 235, .35);
  transition: background .2s ease, transform .2s ease;
}
.header-call:hover { background: #1d4ed8; transform: translateY(-1px); }
.header-call-icon { font-size: 14px; line-height: 1; }
.header-call-no { letter-spacing: .01em; }

.nav-toggle {
  display: none; width: 44px; height: 44px; border: 0; border-radius: 12px;
  background: rgba(255, 255, 255, .12); cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { width: 20px; height: 2px; background: #fff; border-radius: 2px; transition: .25s ease; }
.site-header.scrolled .nav-toggle { background: var(--bg-alt); }
.site-header.scrolled .nav-toggle span { background: var(--ink); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 96px;
  background: radial-gradient(120% 90% at 15% 0%, var(--navy-700) 0%, var(--navy-900) 58%);
  color: #cfdcf2;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.orbit {
  position: absolute; border: 1px solid rgba(120, 170, 255, .16); border-radius: 50%;
}
.orbit-a { width: 620px; height: 620px; right: -160px; top: -170px; animation: spin 60s linear infinite; }
.orbit-b { width: 420px; height: 420px; right: -40px; top: 120px; border-style: dashed; animation: spin 44s linear infinite reverse; }
.glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.glow-1 { width: 460px; height: 460px; background: #1d4ed8; left: -120px; top: -60px; }
.glow-2 { width: 380px; height: 380px; background: #b45309; right: 10%; bottom: -140px; opacity: .32; }
@keyframes spin { to { transform: rotate(360deg); } }

.hero-inner {
  position: relative;
  display: grid; grid-template-columns: 1.35fr .85fr; gap: 56px; align-items: center;
}
.badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 16px; border-radius: 999px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .16);
  font-size: 14px; font-weight: 600; color: #dbe6ff;
  margin-bottom: 22px;
}
.badge .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--green-500);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, .2);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); } }

.hero h1 {
  font-size: clamp(2.5rem, 5.6vw, 4.1rem);
  color: #fff;
  margin-bottom: 22px;
}
.grad {
  background: linear-gradient(100deg, #60a5fa 10%, var(--amber-500) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { font-size: 18.5px; max-width: 640px; color: #b9c9e6; }
.hero .lead strong { color: #fff; font-weight: 700; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 30px 0 26px; }

.hero-trust { display: flex; flex-wrap: wrap; gap: 10px 26px; font-size: 15px; color: #9fb3d6; }
.hero-trust li { display: flex; align-items: center; gap: 8px; }
.hero-trust span { color: var(--green-500); font-weight: 800; }

.hero-card {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-lg);
}
.hero-card-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.avatar {
  width: 56px; height: 56px; flex: none; border-radius: 18px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--blue-500), var(--purple-500));
  color: #fff; font: 800 19px/1 var(--font-head); letter-spacing: .04em;
}
.hero-card-head h2 { font-size: 20px; color: #fff; margin: 0 0 2px; }
.hero-card-head p { margin: 0; font-size: 14px; color: #9fb3d6; }

.mini-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0; }
.mini-stats > div {
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 14px; padding: 13px 15px;
}
.mini-stats dt { font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: #8ea6cc; margin-bottom: 3px; }
.mini-stats dd { margin: 0; font: 700 15.5px/1.3 var(--font-head); color: #fff; }

.hero-card-foot { margin-top: 22px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .12); }
.hero-card-foot p { margin: 0; font-size: 15px; font-style: italic; color: #c5d5f0; }
.hero-card-call {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin-top: 18px; padding: 12px 18px; border-radius: 12px;
  background: rgba(37, 211, 102, .14); border: 1px solid rgba(37, 211, 102, .4);
  color: #7ff0ab !important; font: 700 16px/1 var(--font-body);
  text-decoration: none !important; letter-spacing: .01em;
  transition: background .18s ease, transform .18s ease;
}
.hero-card-call:hover { background: rgba(37, 211, 102, .24); transform: translateY(-2px); }

/* ---------- Şerit ---------- */
.strip { background: var(--navy-800); border-top: 1px solid rgba(255, 255, 255, .08); }
.strip-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px 20px;
  padding: 18px 24px;
  font-size: 14.5px; font-weight: 600; color: #8ea6cc; text-align: center;
}
.strip-inner span[aria-hidden] { color: var(--amber-500); }

/* ---------- Bölüm temelleri ---------- */
.section { padding: 104px 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--line); }

.eyebrow {
  font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase;
  color: var(--blue-600); margin-bottom: 12px;
}
.eyebrow.light { color: var(--amber-500); }

.section-title { font-size: clamp(1.85rem, 3.4vw, 2.6rem); margin-bottom: 20px; }
.section-title.light { color: #fff; }
.section-text { font-size: 17.5px; }
.section-text.light { color: #b9c9e6; }
.section-text.light strong { color: #fff; }
.section-text.center { max-width: 720px; margin-inline: auto; }

.section-head { text-align: center; margin-bottom: 56px; }
.section-head .eyebrow { text-align: center; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.grid-2.align-center { align-items: center; }

.chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.chip {
  padding: 8px 15px; border-radius: 999px; background: var(--blue-100);
  color: #1e40af; font-size: 14px; font-weight: 700;
}

/* ---------- Özellik kartları ---------- */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.feature {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow-sm);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.feature:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #c7d7f5; }
.feature-icon {
  display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px;
  background: var(--bg-alt); font-size: 22px; margin-bottom: 16px;
}
.feature h3 { font-size: 17.5px; margin-bottom: 8px; }
.feature p { font-size: 15.5px; margin: 0; color: var(--muted); }

/* ---------- Çalışma ilkeleri ---------- */
.principles {
  margin-top: 64px; padding: 40px;
  background: linear-gradient(150deg, var(--navy-800), var(--navy-700));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.principles-title {
  color: #fff; font-size: 21px; margin-bottom: 28px; text-align: center;
}
.principles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.principle { display: flex; gap: 16px; align-items: flex-start; }
.principle-no {
  flex: none; width: 38px; height: 38px; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--amber-500); color: #3d2a00;
  font: 800 17px/1 var(--font-head);
}
.principle h4 { color: #fff; font-size: 16.5px; margin-bottom: 7px; }
.principle p { color: #b9c9e6; font-size: 15px; margin: 0; }

/* ---------- Ders kartları ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  position: relative;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px 28px 26px;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform .24s ease, box-shadow .24s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.card-featured {
  border-color: var(--amber-500);
  box-shadow: 0 18px 44px rgba(245, 158, 11, .16);
}
.ribbon {
  position: absolute; top: -13px; left: 28px;
  background: var(--amber-500); color: #3d2a00;
  font: 800 12px/1 var(--font-body); letter-spacing: .05em; text-transform: uppercase;
  padding: 8px 14px; border-radius: 999px;
}
.card-top { margin-bottom: 12px; }
.tag {
  display: inline-block; padding: 5px 12px; border-radius: 8px;
  font-size: 12.5px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase;
  margin-bottom: 12px;
}
.tag-blue { background: var(--blue-100); color: #1d4ed8; }
.tag-amber { background: var(--amber-100); color: #b45309; }
.tag-green { background: var(--green-100); color: #047857; }
.tag-purple { background: var(--purple-100); color: #6d28d9; }
.card h3 { font-size: 21px; margin: 0; }
.card > p { font-size: 15.5px; color: var(--muted); }

.card-list { margin: 6px 0 22px; display: grid; gap: 9px; }
.card-list li {
  position: relative; padding-left: 26px; font-size: 15.5px; color: var(--body);
}
.card-list li::before {
  content: ""; position: absolute; left: 0; top: .55em;
  width: 14px; height: 8px;
  border-left: 2.4px solid var(--green-500); border-bottom: 2.4px solid var(--green-500);
  transform: rotate(-45deg);
}
.card-link { margin-top: auto; font-weight: 700; font-size: 15.5px; }
.card-link:hover { text-decoration: none; letter-spacing: .01em; }

/* ---------- Format tablosu ---------- */
.formats {
  margin-top: 56px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 34px; box-shadow: var(--shadow-sm);
}
.formats-title { font-size: 20px; margin-bottom: 22px; }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.format-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.format-table th, .format-table td {
  padding: 15px 16px; text-align: left; border-bottom: 1px solid var(--line);
  font-size: 15px; vertical-align: top;
}
.format-table thead th {
  background: var(--bg-alt); color: var(--ink);
  font: 800 13px/1.4 var(--font-body); letter-spacing: .06em; text-transform: uppercase;
  border-bottom: 2px solid var(--line); white-space: nowrap;
}
.format-table thead th:first-child { border-radius: 10px 0 0 0; }
.format-table thead th:last-child { border-radius: 0 10px 0 0; }
.format-table tbody th { font-weight: 700; color: var(--ink); white-space: nowrap; }
.format-table tbody td { color: var(--muted); }
.format-table tbody tr:last-child th, .format-table tbody tr:last-child td { border-bottom: 0; }
.format-table tbody tr:hover th, .format-table tbody tr:hover td { background: #fbfcfe; }
.formats-note { margin: 20px 0 0; font-size: 15px; color: var(--muted); }

/* ---------- Maarif ---------- */
.maarif {
  background: radial-gradient(120% 110% at 85% 10%, var(--navy-700) 0%, var(--navy-900) 60%);
  color: #b9c9e6;
}
.check-list { display: grid; gap: 12px; margin: 26px 0 32px; }
.check-list li { position: relative; padding-left: 32px; font-size: 16.5px; }
.check-list li::before {
  content: "⚛";
  position: absolute; left: 0; top: 0;
  color: var(--amber-500); font-size: 18px;
}
.check-list.light li { color: #c5d5f0; }

.maarif-visual { display: grid; place-items: center; }
.compare {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center;
  width: 100%;
}
.compare-col {
  border-radius: var(--radius-lg); padding: 26px 22px; text-align: center;
  border: 1px solid rgba(255, 255, 255, .14);
}
.compare-col h3 { font-size: 15px; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 16px; }
.compare-col p { margin: 0 0 10px; font-size: 15.5px; }
.compare-col p:last-child { margin-bottom: 0; }
.compare-col.old { background: rgba(255, 255, 255, .04); color: #8ea6cc; }
.compare-col.old h3 { color: #8ea6cc; }
.compare-col.new {
  background: linear-gradient(160deg, rgba(37, 99, 235, .28), rgba(139, 92, 246, .18));
  border-color: rgba(96, 165, 250, .45);
  color: #fff;
  box-shadow: 0 20px 50px rgba(37, 99, 235, .22);
}
.compare-col.new h3 { color: var(--amber-500); }
.compare-arrow { font-size: 26px; color: var(--amber-500); }

.shift-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 64px;
}
.shift {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .13);
  border-radius: var(--radius); padding: 26px 24px;
  transition: background .22s ease, transform .22s ease;
}
.shift:hover { background: rgba(255, 255, 255, .09); transform: translateY(-4px); }
.shift-label {
  display: inline-block; margin-bottom: 12px;
  font: 800 11.5px/1 var(--font-body); letter-spacing: .12em; text-transform: uppercase;
  color: var(--amber-500);
}
.shift h3 { color: #fff; font-size: 18.5px; margin-bottom: 12px; }
.shift-problem {
  font-size: 15px; color: #8ea6cc; padding-left: 14px;
  border-left: 2px solid rgba(245, 158, 11, .5);
}
.shift-answer { font-size: 15.5px; color: #c5d5f0; margin: 0; }
.shift-answer strong { color: #fff; }

.maarif-note {
  margin: 34px auto 0; max-width: 760px; text-align: center;
  font-size: 15px; color: #8ea6cc;
}

/* ---------- Adımlar ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  position: relative; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px 24px 26px;
  box-shadow: var(--shadow-sm);
}
.step::after {
  content: ""; position: absolute; right: -12px; top: 50px;
  width: 24px; height: 2px; background: var(--line);
}
.step:last-child::after { display: none; }
.step-no {
  display: inline-block; font: 800 13px/1 var(--font-head); letter-spacing: .1em;
  color: #fff; background: var(--navy-700);
  padding: 8px 11px; border-radius: 9px; margin-bottom: 16px;
}
.step h3 { font-size: 17.5px; margin-bottom: 8px; }
.step p { font-size: 15.5px; color: var(--muted); margin: 0; }

/* ---------- Sekmeler / konular ---------- */
.tabs {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-sm);
}
.tab-buttons {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 14px; border-bottom: 1px solid var(--line); background: #fbfcfe;
}
.tab-btn {
  border: 1px solid transparent; background: transparent;
  padding: 11px 20px; border-radius: 999px;
  font: 700 15px/1 var(--font-body); color: var(--muted); cursor: pointer;
  transition: .18s ease;
}
.tab-btn:hover { background: var(--bg-alt); color: var(--ink); }
.tab-btn.is-active {
  background: var(--navy-800); color: #fff; border-color: var(--navy-800);
  box-shadow: 0 6px 16px rgba(11, 26, 48, .22);
}
.tab-panels { padding: 30px 28px 34px; }
.tab-panel { display: none; animation: fade .35s ease; }
.tab-panel.is-active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } }

.panel-intro {
  margin: 0 0 20px; padding: 14px 18px;
  background: var(--blue-100); border-left: 4px solid var(--blue-600); border-radius: 0 10px 10px 0;
  font-size: 15.5px; color: #1e3a8a;
}
.panel-intro strong { color: #1d4ed8; }

.topic-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.topic-list li {
  position: relative;
  padding: 15px 18px 15px 46px;
  background: var(--bg-alt); border: 1px solid var(--line); border-radius: 12px;
  transition: .18s ease;
}
.topic-list li::before {
  content: ""; position: absolute; left: 18px; top: 21px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--blue-500); box-shadow: 0 0 0 4px var(--blue-100);
}
.topic-list li strong {
  display: block; font-size: 15.5px; font-weight: 700; color: var(--ink); margin-bottom: 3px;
}
.topic-list li span { display: block; font-size: 14px; line-height: 1.55; color: var(--muted); }
.topic-list li:hover { background: #fff; border-color: #c7d7f5; transform: translateX(3px); }

.note { text-align: center; margin-top: 24px; font-size: 15px; color: var(--muted); }

/* ---------- Referans kutusu ---------- */
.reference-box {
  margin-top: 40px; padding: 32px 36px;
  background: linear-gradient(150deg, var(--navy-800), var(--navy-700));
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  box-shadow: var(--shadow);
}
.reference-box h3 { color: #fff; font-size: 20px; margin-bottom: 10px; }
.reference-box p { color: #b9c9e6; font-size: 15.5px; margin: 0; max-width: 640px; }
.reference-box .btn { flex: none; }

/* ---------- SSS ---------- */
.faq { display: grid; gap: 12px; }
.faq-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 4px 22px; box-shadow: var(--shadow-sm);
  transition: border-color .2s ease;
}
.faq-item[open] { border-color: #c7d7f5; }
.faq-item summary {
  cursor: pointer; list-style: none;
  padding: 18px 34px 18px 0; position: relative;
  font: 700 17px/1.5 var(--font-head); color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg-alt); color: var(--blue-600);
  font: 700 20px/1 var(--font-body);
  transition: transform .22s ease, background .22s ease;
}
.faq-item[open] summary::after { content: "−"; background: var(--blue-600); color: #fff; }
.faq-item p { margin: 0 0 20px; font-size: 16px; color: var(--muted); padding-right: 20px; }

/* ---------- İletişim ---------- */
.contact { background: var(--bg-alt); border-top: 1px solid var(--line); }

.intro-call {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 28px; margin: 26px 0; box-shadow: var(--shadow-sm);
}
.intro-call h3 { font-size: 17.5px; margin-bottom: 16px; }
.intro-steps { counter-reset: ic; display: grid; gap: 11px; margin-bottom: 18px; }
.intro-steps li {
  counter-increment: ic; position: relative; padding-left: 36px;
  font-size: 15.5px; color: var(--body);
}
.intro-steps li::before {
  content: counter(ic);
  position: absolute; left: 0; top: 1px;
  width: 24px; height: 24px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--blue-100); color: #1d4ed8;
  font: 800 12.5px/1 var(--font-body);
}
.intro-note {
  margin: 0; padding-top: 16px; border-top: 1px solid var(--line);
  font-size: 14.5px; color: var(--muted);
}

.contact-list { display: grid; gap: 16px; margin: 28px 0; }
.contact-list li { display: flex; gap: 14px; align-items: flex-start; }
.ci {
  width: 42px; height: 42px; flex: none; border-radius: 12px;
  display: grid; place-items: center; background: #fff;
  border: 1px solid var(--line); font-size: 18px;
}
.contact-list strong { display: block; font-size: 14px; color: var(--ink); }
.contact-list a, .contact-list span { font-size: 16px; color: var(--body); }

.socials { display: flex; flex-wrap: wrap; gap: 10px; }
.social {
  padding: 10px 18px; border-radius: 999px; background: #fff;
  border: 1px solid var(--line); font-size: 14.5px; font-weight: 700; color: var(--ink);
  text-decoration: none !important; transition: .18s ease;
}
.social:hover { border-color: var(--blue-500); color: var(--blue-600); transform: translateY(-2px); }
.social-call { background: var(--navy-800); border-color: var(--navy-800); color: #fff; }
.social-call:hover { background: var(--navy-700); border-color: var(--navy-700); color: #fff; }
.social-wa { background: #25d366; border-color: #25d366; color: #04331a; }
.social-wa:hover { background: #1fbb5a; border-color: #1fbb5a; color: #04331a; }
.social-mail { background: var(--blue-600); border-color: var(--blue-600); color: #fff; }
.social-mail:hover { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }

/* Uzun e-posta adresi dar ekranda taşmasın */
.contact-list a { word-break: break-word; }

.form {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow);
}
.form h3 { font-size: 21px; margin-bottom: 22px; }
.field { margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field label {
  display: block; font-size: 14px; font-weight: 700; color: var(--ink); margin-bottom: 7px;
}
.field label span { color: #dc2626; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px;
  border: 1.5px solid var(--line); border-radius: 12px;
  font: 400 16px/1.5 var(--font-body); color: var(--ink); background: #fff;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.field textarea { resize: vertical; min-height: 100px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 4px rgba(59, 130, 246, .14);
}
.field input.invalid, .field select.invalid { border-color: #dc2626; }
.err { display: block; min-height: 16px; margin-top: 5px; font-size: 13px; color: #dc2626; }
.form-buttons { display: grid; gap: 10px; }
.form-note { font-size: 13.5px; color: var(--muted); margin: 14px 0 0; text-align: center; }
.form-note a { word-break: break-all; }
.form-status { margin: 10px 0 0; font-size: 14.5px; font-weight: 600; color: var(--green-500); text-align: center; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-900); color: #8ea6cc; padding: 60px 0 28px; }
.footer-inner {
  display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; align-items: flex-start;
  padding-bottom: 32px; border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.brand-footer .brand-text strong { color: #fff; }
.footer-text { margin: 14px 0 0; font-size: 15px; max-width: 380px; }
.footer-contact { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0 0; }
.footer-contact a {
  padding: 9px 16px; border-radius: 999px;
  background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .16);
  color: #fff; font-size: 14.5px; font-weight: 700; text-decoration: none !important;
  transition: background .18s ease;
}
.footer-contact a:hover { background: rgba(255, 255, 255, .16); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.footer-nav a { color: #b9c9e6; font-size: 15px; font-weight: 600; text-decoration: none !important; }
.footer-nav a:hover { color: #fff; }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between;
  padding-top: 24px; font-size: 14px;
}
.footer-bottom p { margin: 0; }

/* ---------- Yüzen buton ---------- */
.fab {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 999px;
  background: #25d366; color: #04331a !important;
  font: 700 15px/1 var(--font-body); text-decoration: none !important;
  box-shadow: 0 12px 30px rgba(37, 211, 102, .42);
  transform: translateY(120px); opacity: 0;
  transition: transform .32s ease, opacity .32s ease, box-shadow .2s ease;
}
.fab.show { transform: translateY(0); opacity: 1; }
.fab:hover { box-shadow: 0 16px 40px rgba(37, 211, 102, .55); }

/* ---------- Scroll animasyonu ----------
   Gizleme yalnızca .js sınıfı varken uygulanır; JavaScript çalışmazsa
   içerik gizli kalmaz, olduğu gibi görünür. */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.visible { opacity: 1; transform: none; }

/* ---------- Duyarlı tasarım ---------- */
/* Ara genişliklerde menü sıkışmasın */
@media (max-width: 1180px) and (min-width: 1001px) {
  .nav a { padding: 8px 9px; font-size: 13.5px; }
  .header-call { padding: 9px 14px; font-size: 14px; }
}

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-card { max-width: 520px; }
  .cards, .topic-list { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
  .grid-2 { gap: 44px; }
  .principles-grid { grid-template-columns: 1fr; gap: 22px; }
  .reference-box { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 1000px) {
  :root { --header-h: 66px; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: #fff; padding: 16px 20px 26px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, .14);
    border-bottom: 1px solid var(--line);
    transform: translateY(-130%); transition: transform .3s ease;
  }
  .nav.open { transform: translateY(0); }
  .nav a { color: var(--ink) !important; padding: 13px 16px; font-size: 16px; }
  .nav-toggle { display: flex; }
  .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 76px 0; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .compare { grid-template-columns: 1fr; }
  .compare-arrow { transform: rotate(90deg); justify-self: center; }
  .shift-grid { grid-template-columns: 1fr; margin-top: 44px; }
  .principles { padding: 30px 24px; margin-top: 48px; }
  .formats { padding: 26px 22px; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .container { padding-inline: 18px; }
  .hero { padding: calc(var(--header-h) + 48px) 0 68px; }
  .hero-actions .btn { width: 100%; }
  .cards, .topic-list, .steps, .feature-grid, .field-row, .mini-stats {
    grid-template-columns: 1fr;
  }
  /* Dar ekranda numara yerine sadece telefon simgesi */
  .header-call { padding: 0; width: 44px; height: 44px; justify-content: center; border-radius: 12px; }
  .header-call-no { display: none; }
  .header-call-icon { font-size: 17px; }
  .form { padding: 24px 20px; }
  .tab-panels { padding: 22px 18px 26px; }
  .intro-call { padding: 22px 20px; }
  .reference-box { padding: 26px 22px; }
  .reference-box .btn { width: 100%; }
  .formats-title, .principles-title { font-size: 18px; }
  .fab .fab-text { display: none; }
  .fab { padding: 16px; }
  .footer-bottom { flex-direction: column; }
}

/* ---------- Hareket azaltma tercihi ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Yazdırma ---------- */
@media print {
  .site-header, .fab, .nav-toggle, .form { display: none; }
  .hero, .maarif, .site-footer { background: #fff !important; color: #000 !important; }
  .hero h1, .section-title.light, .brand-text strong { color: #000 !important; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
}