:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --accent: #2563eb; /* mavi (blue-600) */
  --divider: #2563eb;
  --max: 1100px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* Sağ altta dil seçici (TR/EN) */
.lang-toggle {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.14);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.lang-toggle__btn {
  border: 0;
  background: transparent;
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 800;
  letter-spacing: 0.6px;
  font-size: 12px;
  color: #111;
}

.lang-toggle__btn.is-active {
  background: rgba(37, 99, 235, 0.12);
  color: var(--accent);
}

.lang-toggle__sep {
  color: rgba(0, 0, 0, 0.35);
  font-weight: 700;
  user-select: none;
}

/* Okulum Hakkımda + embed stilleri */
.school-h2 {
  margin: 0 0 10px;
  font-size: 16px;
  letter-spacing: 0.4px;
}

.school-p {
  margin: 0 0 10px;
  font-size: 13px;
  color: #111;
  line-height: 1.55;
}

.school-links {
  margin: 8px 0 14px;
  padding-left: 18px;
  font-size: 13px;
}

.school-link {
  color: var(--accent);
  text-decoration: none;
}

.school-link:hover {
  text-decoration: underline;
}

.school-note {
  margin: 10px 0 0;
  font-size: 12px;
  color: rgba(0, 0, 0, 0.65);
}

.home-external {
  margin-top: 22px;
}

.school-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 10px 0 6px;
}

.school-h3 {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.3px;
}

.embed-shell {
  width: 100%;
  max-width: 640px;
  margin: 10px auto 0;
  padding: 12px;
  border-radius: 14px;
  background: #e5e7eb;
  border: 1px solid rgba(0, 0, 0, 0.12);
}

.embed-frame {
  width: 100%;
  height: 520px;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.18);
  overflow: hidden;
  background: #fff;
}

.embed-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.site-header {
  background: var(--bg);
}

.nav-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  min-width: 220px;
}

.brand__logo {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.brand__text {
  font-weight: 700;
  letter-spacing: 0.2px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  flex-wrap: wrap;
}

.nav__link {
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 1.4px;
  color: #222;
  padding: 8px 6px;
  border-radius: 10px;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav__link:hover {
  background: rgba(37, 99, 235, 0.10);
  color: var(--accent);
}

.nav__link--active {
  color: var(--accent);
}

.header-divider {
  height: 2px;
  background: var(--divider);
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 44px 20px 80px;
}

.hero {
  text-align: center;
}

.hero__title {
  margin: 0 0 12px;
  color: var(--accent);
  letter-spacing: 2px;
}

.hero__subtitle {
  margin: 0 auto 26px;
  color: var(--muted);
  max-width: 650px;
  font-size: 13px;
}

.hero__card {
  display: grid;
  place-items: center;
}

.hero__image {
  width: min(560px, 100%);
  aspect-ratio: 4 / 5;
  border-radius: 14px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: linear-gradient(
    180deg,
    rgba(37, 99, 235, 0.12),
    rgba(56, 189, 248, 0.14)
  );
  display: grid;
  place-items: center;
  color: rgba(0, 0, 0, 0.55);
  font-size: 13px;
}

/* =========================
   SCHEDULE (ders programı)
   ========================= */
.schedule-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.10);
  background: #fff;
}

.schedule-table {
  width: 100%;
  min-width: 980px; /* mobilde yatay kaydırma için */
  border-collapse: collapse;
  table-layout: fixed;
}

.schedule-table th,
.schedule-table td {
  border: 1px solid rgba(0, 0, 0, 0.35);
  padding: 10px 10px;
  vertical-align: top;
}

.schedule-table th {
  background: #f5f5f5;
  color: #111;
  font-size: 12px;
  letter-spacing: 0.6px;
  text-align: center;
}

.schedule-table .time-col {
  width: 120px;
  text-align: center;
  font-weight: 800;
}

.course-card {
  border: 1px solid rgba(0, 0, 0, 0.55);
  padding: 10px 10px;
  margin: 10px 0;
  background: #fff;
}

.course-title {
  display: grid;
  gap: 4px;
  margin-bottom: 6px;
}

.course-code {
  font-weight: 800;
  font-size: 12px;
}

.course-name {
  font-weight: 700;
  font-size: 12px;
}

.course-meta {
  font-size: 12px;
  color: #111;
}

.course-empty {
  color: rgba(0, 0, 0, 0.55);
  font-size: 14px;
  padding: 8px 2px;
}

/* =========================
   FORM PAGE (pembe tema)
   ========================= */
.form-page {
  --form-accent: #2023af;
}

.form-page .hero__title {
  color: var(--form-accent);
  font-size: 44px;
  letter-spacing: 1px;
}

.contact-card {
  width: min(980px, 100%);
  background: #fff;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 26px 28px;
}

.contact-form {
  text-align: left;
}

.contact-form .field {
  margin: 14px 0;
}

.contact-form label {
  display: inline-block;
  margin: 0 0 8px;
  font-size: 12px;
  color: #222;
}

.contact-form .req {
  color: var(--form-accent);
  font-weight: 700;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
  width: 100%;
  border: 1.5px solid var(--form-accent);
  border-radius: 3px;
  padding: 10px 12px;
  font-size: 14px;
  outline: none;
}

.contact-form textarea {
  resize: vertical;
  min-height: 140px;
}

.contact-form input:focus,
.contact-form textarea:focus {
  box-shadow: 0 0 0 3px rgba(32, 35, 175, 0.18);
}

.contact-form fieldset.choices {
  border: 0;
  padding: 0;
  margin: 14px 0 6px;
}

.contact-form fieldset.choices legend {
  font-size: 12px;
  color: #222;
  padding: 0 0 8px;
}

.contact-form .check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: 18px;
  font-size: 12px;
  color: #222;
}

.contact-form .check input {
  accent-color: var(--form-accent);
}

.status {
  min-height: 18px;
  margin: 10px 0 14px;
  font-size: 13px;
}

.status--ok {
  color: #0f766e;
}

.status--err {
  color: #b91c1c;
}

.submit-btn {
  width: 100%;
  border: 0;
  border-radius: 4px;
  background: #111;
  color: #fff;
  padding: 12px 14px;
  font-size: 13px;
  cursor: pointer;
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

@media (max-width: 720px) {
  .nav-wrap {
    flex-direction: column;
    align-items: stretch;
  }
  .brand {
    justify-content: center;
  }
  .nav {
    justify-content: center;
  }
  .form-page .hero__title {
    font-size: 34px;
  }
  .contact-card {
    padding: 18px 16px;
  }
  .school-grid {
    grid-template-columns: 1fr;
  }
  .embed-shell {
    max-width: 100%;
    padding: 10px;
  }
  .embed-frame {
    height: 420px;
  }
}