/*
Theme Name: TKU Theme
Theme URI: https://example.com
Author: Nur Ali Ünal
Description: TKU ödev projesi için tamamen özel, responsive (mobil/tablet/masaüstü) WordPress teması.
Version: 1.0.0
License: GNU General Public License v2 or later
Text Domain: tku-theme
*/

/* ===================== Değişkenler ===================== */
:root {
  --renk-ana: #2563eb;
  --renk-koyu: #1e293b;
  --renk-acik: #f8fafc;
  --renk-gri: #64748b;
  --renk-kenar: #e2e8f0;
  --renk-basari: #16a34a;
  --renk-hata: #dc2626;
  --golge: 0 4px 20px rgba(0, 0, 0, .08);
  --yuvarlak: 14px;
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--renk-koyu);
  background: var(--renk-acik);
  line-height: 1.6;
}

a { color: var(--renk-ana); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; }

.kapsayici {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===================== Üst Menü ===================== */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--renk-kenar);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .kapsayici {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--renk-koyu);
}
.logo span { color: var(--renk-ana); }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--renk-kenar);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 1.2rem;
  cursor: pointer;
}

.ana-menu ul {
  list-style: none;
  display: flex;
  gap: 8px;
  align-items: center;
}
.ana-menu a {
  display: block;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--renk-koyu);
  font-weight: 500;
}
.ana-menu a:hover { background: var(--renk-acik); text-decoration: none; }
.ana-menu .current-menu-item > a { background: var(--renk-ana); color: #fff; }

/* ===================== Hero ===================== */
.hero {
  background: linear-gradient(135deg, #2563eb 0%, #1e3a8a 100%);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}
.hero h1 { font-size: clamp(1.8rem, 5vw, 3rem); margin-bottom: 16px; }
.hero p { font-size: clamp(1rem, 2.5vw, 1.25rem); opacity: .92; max-width: 640px; margin: 0 auto 28px; }

.btn {
  display: inline-block;
  background: var(--renk-ana);
  color: #fff;
  padding: 12px 26px;
  border-radius: 10px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform .08s ease, opacity .2s ease;
}
.btn:hover { opacity: .92; text-decoration: none; color: #fff; }
.btn:active { transform: translateY(1px); }
.btn-acik { background: #fff; color: var(--renk-ana); }
.btn-tehlike { background: var(--renk-hata); }
.btn-kucuk { padding: 6px 14px; font-size: .85rem; }

/* ===================== Bölümler ===================== */
.bolum { padding: 64px 0; }
.bolum h2 { font-size: 1.8rem; margin-bottom: 8px; text-align: center; }
.bolum .alt-baslik { text-align: center; color: var(--renk-gri); margin-bottom: 40px; }

.izgara {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.kart {
  background: #fff;
  border: 1px solid var(--renk-kenar);
  border-radius: var(--yuvarlak);
  padding: 24px;
  box-shadow: var(--golge);
}
.kart h3 { margin-bottom: 8px; }
.kart .etiket {
  display: inline-block;
  background: #eff6ff;
  color: var(--renk-ana);
  font-size: .75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

/* ===================== Sayfa içerik ===================== */
.sayfa { padding: 48px 0 64px; }
.sayfa h1 { font-size: 2rem; margin-bottom: 24px; }
.icerik p { margin-bottom: 16px; }

/* ===================== Formlar ===================== */
.form-kutu {
  background: #fff;
  border: 1px solid var(--renk-kenar);
  border-radius: var(--yuvarlak);
  padding: 32px;
  box-shadow: var(--golge);
  max-width: 480px;
  margin: 0 auto;
}
.form-grid { display: grid; gap: 16px; }
.form-grup { display: flex; flex-direction: column; gap: 6px; }
.form-grup label { font-weight: 600; font-size: .9rem; }
.form-grup input,
.form-grup textarea,
.form-grup select {
  padding: 11px 13px;
  border: 1px solid var(--renk-kenar);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  width: 100%;
}
.form-grup input:focus,
.form-grup textarea:focus {
  outline: none;
  border-color: var(--renk-ana);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
}
.form-grup textarea { min-height: 120px; resize: vertical; }

.uyari {
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 20px;
  font-size: .95rem;
}
.uyari-basari { background: #dcfce7; color: #166534; border: 1px solid #86efac; }
.uyari-hata { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }

/* İki sütunlu giriş/kayıt */
.ikili { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }

/* ===================== Tablolar (yönetim) ===================== */
.tablo { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--yuvarlak); overflow: hidden; box-shadow: var(--golge); }
.tablo th, .tablo td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--renk-kenar); }
.tablo th { background: var(--renk-acik); font-size: .85rem; text-transform: uppercase; letter-spacing: .03em; }
.tablo-sar { overflow-x: auto; }

/* ===================== Footer ===================== */
.site-footer {
  background: var(--renk-koyu);
  color: #cbd5e1;
  padding: 40px 0;
  text-align: center;
  margin-top: 40px;
}
.site-footer a { color: #93c5fd; }

/* ===================== RESPONSIVE ===================== */
/* Tablet */
@media (max-width: 900px) {
  .ikili { grid-template-columns: 1fr; }
}
/* Telefon */
@media (max-width: 720px) {
  .menu-toggle { display: block; }
  .ana-menu {
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--renk-kenar);
    display: none;
  }
  .ana-menu.acik { display: block; }
  .ana-menu ul { flex-direction: column; align-items: stretch; padding: 12px; gap: 4px; }
  .hero { padding: 56px 0; }
  .bolum { padding: 44px 0; }
}