/* ============================================================
   ELİF ERBEYİN — MATEMATİK ÖZEL DERS — ANA STİL DOSYASI
   ============================================================ */

/* === GOOGLE FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=DM+Sans:wght@400;500;600&display=swap');

/* === KÖK DEĞİŞKENLER === */
:root {
  --renk-koyu       : #1C1410;
  --renk-altin      : #C9A96E;
  --renk-altin-acik : #e0c28f;
  --renk-krem       : #F5F0EB;
  --renk-beyaz      : #FFFFFF;
  --renk-acik-kahve : #8B6F52;
  --renk-yesil      : #2D7A47;
  --renk-yesil-acik : #3a9a5c;
  --renk-gri        : #F0EDE8;
  --renk-sinir      : #E0D8CE;
  --renk-hata       : #c0392b;

  --yazi-baslik     : 'Playfair Display', serif;
  --yazi-metin      : 'DM Sans', sans-serif;

  --bosluk-xs  : 8px;
  --bosluk-sm  : 16px;
  --bosluk-md  : 24px;
  --bosluk-lg  : 48px;
  --bosluk-xl  : 80px;
  --bosluk-xxl : 120px;

  --golge-sm   : 0 2px 8px rgba(28,20,16,.08);
  --golge-md   : 0 6px 24px rgba(28,20,16,.12);
  --golge-lg   : 0 16px 48px rgba(28,20,16,.16);

  --radius-sm  : 8px;
  --radius-md  : 16px;
  --radius-lg  : 24px;

  --gecis      : all .3s ease;
}

/* === RESET & TEMEL === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--yazi-metin);
  background: var(--renk-krem);
  color: var(--renk-koyu);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--yazi-metin); }

/* === TİPOGRAFİ === */
h1, h2, h3, h4 { font-family: var(--yazi-baslik); line-height: 1.2; color: var(--renk-koyu); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); font-weight: 700; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.8rem); font-weight: 700; }
h4 { font-size: 1.1rem; font-weight: 700; }
p  { color: var(--renk-acik-kahve); line-height: 1.8; }

.baslik-altin { color: var(--renk-altin); }
.bolum-baslik { text-align: center; margin-bottom: var(--bosluk-lg); }
.bolum-baslik h2 { margin-bottom: var(--bosluk-sm); }
.bolum-baslik p  { max-width: 600px; margin: 0 auto; font-size: 1.05rem; }

/* === KONTEYNER === */
.konteyner { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--bosluk-md); }

/* === BÖLÜM === */
.bolum { padding: var(--bosluk-xl) 0; }
.bolum-gri { background: var(--renk-gri); }
.bolum-koyu { background: var(--renk-koyu); color: var(--renk-krem); }
.bolum-koyu h2, .bolum-koyu h3, .bolum-koyu h4 { color: var(--renk-krem); }
.bolum-koyu p { color: #b8a898; }

/* === BUTONLAR === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--bosluk-xs);
  padding: 14px 28px;
  border-radius: 50px;
  font-family: var(--yazi-metin);
  font-weight: 500;
  font-size: .95rem;
  transition: var(--gecis);
  cursor: pointer;
}
.btn-altin {
  background: var(--renk-altin);
  color: var(--renk-koyu);
}
.btn-altin:hover { background: var(--renk-altin-acik); transform: translateY(-2px); box-shadow: var(--golge-md); }

.btn-yesil {
  background: var(--renk-yesil);
  color: #fff;
}
.btn-yesil:hover { background: var(--renk-yesil-acik); transform: translateY(-2px); box-shadow: var(--golge-md); }

.btn-outline {
  background: transparent;
  color: var(--renk-koyu);
  border: 2px solid var(--renk-sinir);
}
.btn-outline:hover { border-color: var(--renk-altin); color: var(--renk-altin); transform: translateY(-2px); }

.btn-outline-beyaz {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.4);
}
.btn-outline-beyaz:hover { border-color: #fff; background: rgba(255,255,255,.1); transform: translateY(-2px); }

.btn-lg { padding: 18px 36px; font-size: 1rem; }
.btn-sm { padding: 10px 20px; font-size: .85rem; }

/* === NAVİGASYON === */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: var(--gecis);
}
.navbar.seffaf { background: transparent; }
.navbar.katı   { background: rgba(255,255,255,.97); box-shadow: var(--golge-sm); padding: 12px 0; }

.navbar-ic {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo { display: flex; flex-direction: column; line-height: 1.1; }
.navbar-logo-ad {
  font-family: var(--yazi-baslik);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--renk-altin);
  transition: color .3s;
}
.navbar.seffaf .navbar-logo-ad { color: var(--renk-altin); }
.navbar-logo-unvan {
  font-size: .75rem;
  color: var(--renk-acik-kahve);
  font-weight: 500;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.navbar-menu a {
  padding: 8px 14px;
  border-radius: 50px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--renk-koyu);
  transition: var(--gecis);
  position: relative;
}
.navbar.seffaf .navbar-menu a { color: var(--renk-koyu); }
.navbar.katı .navbar-menu a { color: var(--renk-koyu) !important; }
.navbar-koyu-zemin.seffaf .navbar-menu a { color: var(--renk-krem) !important; }
.navbar-koyu-zemin.seffaf .navbar-menu a:hover { color: var(--renk-altin) !important; background: rgba(255,255,255,.1); }
.navbar-menu a:hover { color: var(--renk-altin); background: rgba(201,169,110,.08); }
.navbar-menu a.aktif { color: var(--renk-altin); }
.navbar-menu a.aktif::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  transform: translateX(-50%);
  width: 20px; height: 2px;
  background: var(--renk-altin);
  border-radius: 2px;
}

.navbar-whatsapp {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--renk-yesil);
  color: #fff !important;
  padding: 10px 18px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 500;
  transition: var(--gecis);
}
.navbar-whatsapp:hover { background: var(--renk-yesil-acik) !important; transform: translateY(-1px); box-shadow: var(--golge-sm); }
.navbar-whatsapp svg { width: 16px; height: 16px; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--renk-koyu);
  border-radius: 2px;
  transition: var(--gecis);
}
.navbar.katı .hamburger span { background: var(--renk-koyu) !important; }
.navbar-koyu-zemin.seffaf .hamburger span { background: var(--renk-krem) !important; }
.hamburger.acik span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.acik span:nth-child(2) { opacity: 0; }
.hamburger.acik span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === MOBİL MENÜ === */
.mobil-menu {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(12px);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--bosluk-sm);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity .3s, transform .3s;
}
.mobil-menu.acik { opacity: 1; pointer-events: all; transform: translateY(0); }
.mobil-menu a {
  font-family: var(--yazi-baslik);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--renk-koyu);
  transition: color .2s;
}
.mobil-menu a:hover { color: var(--renk-altin); }
.mobil-menu .mobil-whatsapp {
  margin-top: var(--bosluk-md);
  background: var(--renk-yesil);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-family: var(--yazi-metin);
  font-size: 1rem;
}

/* === WHATSAPP SABİT BUTON === */
.wa-sabit {
  position: fixed;
  bottom: 32px; right: 32px;
  z-index: 900;
}
.wa-sabit-btn {
  width: 60px; height: 60px;
  background: var(--renk-yesil);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(45,122,71,.4);
  transition: var(--gecis);
  position: relative;
}
.wa-sabit-btn svg { width: 30px; height: 30px; }
.wa-sabit-btn:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(45,122,71,.55); }
.wa-sabit-tooltip {
  position: absolute;
  right: 72px; top: 50%;
  transform: translateY(-50%);
  background: var(--renk-koyu);
  color: #fff;
  white-space: nowrap;
  font-size: .8rem;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s;
}
.wa-sabit-tooltip::after {
  content: '';
  position: absolute;
  right: -6px; top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--renk-koyu);
  border-right: none;
}
.wa-sabit:hover .wa-sabit-tooltip { opacity: 1; }

/* === YUKARI ÇIKAR BUTONU === */
.yukari-btn {
  position: fixed;
  bottom: 32px; left: 32px;
  z-index: 900;
  width: 48px; height: 48px;
  background: var(--renk-beyaz);
  border: 2px solid var(--renk-sinir);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--golge-sm);
  opacity: 0;
  pointer-events: none;
  transition: var(--gecis);
  cursor: pointer;
}
.yukari-btn.gorunen { opacity: 1; pointer-events: all; }
.yukari-btn:hover { background: var(--renk-altin); border-color: var(--renk-altin); transform: translateY(-2px); }
.yukari-btn:hover svg { stroke: #fff; }
.yukari-btn svg { width: 20px; height: 20px; stroke: var(--renk-koyu); transition: stroke .3s; }

/* === FOOTER === */
.footer {
  background: var(--renk-koyu);
  color: #c5b8aa;
  padding: var(--bosluk-xl) 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1.5fr;
  gap: var(--bosluk-lg);
  padding-bottom: var(--bosluk-lg);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-logo-ad {
  font-family: var(--yazi-baslik);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--renk-altin);
  display: block;
  margin-bottom: 4px;
}
.footer-logo-unvan { font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; color: #9a8878; margin-bottom: var(--bosluk-md); }
.footer-aciklama { font-size: .9rem; line-height: 1.8; margin-bottom: var(--bosluk-md); color: #9a8878; }
.footer-sosyal { display: flex; gap: var(--bosluk-sm); }
.footer-sosyal a {
  width: 38px; height: 38px;
  background: rgba(255,255,255,.06);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: var(--gecis);
}
.footer-sosyal a:hover { background: var(--renk-altin); }
.footer-sosyal svg { width: 18px; height: 18px; }

.footer h4 { color: var(--renk-krem); font-size: 1rem; margin-bottom: var(--bosluk-md); }
.footer-linkler { display: flex; flex-direction: column; gap: 10px; }
.footer-linkler a { font-size: .9rem; color: #9a8878; transition: color .2s; }
.footer-linkler a:hover { color: var(--renk-altin); }

.footer-iletisim { display: flex; flex-direction: column; gap: 12px; }
.footer-iletisim-satir {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: .9rem; color: #9a8878;
}
.footer-iletisim-satir svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px; color: var(--renk-altin); }

.footer-alt {
  text-align: center;
  padding: var(--bosluk-md) 0;
  font-size: .82rem;
  color: #6a5a4e;
}

/* === KARTLAR === */
.kart {
  background: var(--renk-beyaz);
  border-radius: var(--radius-md);
  padding: var(--bosluk-md);
  box-shadow: var(--golge-sm);
  border: 1px solid var(--renk-sinir);
  transition: var(--gecis);
}
.kart:hover { transform: translateY(-4px); box-shadow: var(--golge-md); }

.kart-ikon {
  width: 56px; height: 56px;
  background: rgba(201,169,110,.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  margin-bottom: var(--bosluk-md);
}

/* === GRID SİSTEMİ === */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--bosluk-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--bosluk-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--bosluk-md); }

/* === YÜKLEME EKRANI === */
.yukleme {
  position: fixed;
  inset: 0;
  background: var(--renk-koyu);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .5s, visibility .5s;
}
.yukleme.gizle { opacity: 0; visibility: hidden; }
.yukleme-monogram {
  font-family: var(--yazi-baslik);
  font-size: 4rem;
  font-weight: 700;
  color: var(--renk-altin);
  animation: monogramPuls 0.8s ease-in-out;
}
@keyframes monogramPuls {
  0%   { opacity: 0; transform: scale(.8); }
  60%  { opacity: 1; transform: scale(1.05); }
  100% { opacity: 1; transform: scale(1); }
}

/* === COOKİE BANNER === */
.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 800;
  background: var(--renk-koyu);
  color: #c5b8aa;
  padding: var(--bosluk-sm) var(--bosluk-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--bosluk-md);
  box-shadow: 0 -4px 20px rgba(0,0,0,.2);
  transform: translateY(100%);
  transition: transform .4s ease;
}
.cookie-banner.gorunen { transform: translateY(0); }
.cookie-banner p { font-size: .85rem; }
.cookie-banner p a { color: var(--renk-altin); text-decoration: underline; }
.cookie-kapat {
  flex-shrink: 0;
  background: var(--renk-altin);
  color: var(--renk-koyu);
  border: none;
  padding: 8px 20px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}
.cookie-kapat:hover { background: var(--renk-altin-acik); }

/* === ETİKET === */
.etiket {
  display: inline-block;
  background: rgba(201,169,110,.12);
  color: var(--renk-altin);
  border: 1px solid rgba(201,169,110,.3);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .04em;
}
.etiket-yesil { background: rgba(45,122,71,.1); color: var(--renk-yesil); border-color: rgba(45,122,71,.25); }
.etiket-koyu  { background: rgba(28,20,16,.08); color: var(--renk-koyu); border-color: rgba(28,20,16,.15); }

/* === GÖRSEL YER TUTUCUSU === */
.img-placeholder {
  background: linear-gradient(135deg, #f0ebe3, #e5ddd2);
  border: 2px dashed var(--renk-sinir);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--renk-acik-kahve);
  font-size: .9rem;
  text-align: center;
  padding: var(--bosluk-md);
}
.img-placeholder svg { width: 48px; height: 48px; opacity: .4; }

/* === FORM === */
.form-grup { margin-bottom: var(--bosluk-md); }
.form-grup label {
  display: block;
  font-size: .9rem;
  font-weight: 500;
  color: var(--renk-koyu);
  margin-bottom: 8px;
}
.form-grup input,
.form-grup textarea,
.form-grup select {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--renk-sinir);
  border-radius: var(--radius-sm);
  font-family: var(--yazi-metin);
  font-size: .95rem;
  color: var(--renk-koyu);
  background: var(--renk-beyaz);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
.form-grup input:focus,
.form-grup textarea:focus,
.form-grup select:focus {
  border-color: var(--renk-altin);
  box-shadow: 0 0 0 3px rgba(201,169,110,.15);
}
.form-grup input.hata,
.form-grup textarea.hata {
  border-color: var(--renk-hata);
  box-shadow: 0 0 0 3px rgba(192,57,43,.12);
}
.form-grup .hata-mesaj { color: var(--renk-hata); font-size: .8rem; margin-top: 4px; }
.form-grup textarea { resize: vertical; min-height: 140px; }

/* === SLIDER NOKTALAR === */
.slider-dots {
  display: flex; justify-content: center; gap: 8px;
  margin-top: var(--bosluk-md);
}
.slider-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--renk-sinir);
  cursor: pointer;
  transition: var(--gecis);
}
.slider-dot.aktif { background: var(--renk-altin); width: 24px; border-radius: 4px; }

/* === SAYAÇ === */
.sayac-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: var(--bosluk-md);
  text-align: center;
}
.sayac-kutu { padding: var(--bosluk-md); }
.sayac-sayi {
  font-family: var(--yazi-baslik);
  font-size: 3rem;
  font-weight: 700;
  color: var(--renk-altin);
  line-height: 1;
  display: block;
}
.sayac-etiket { font-size: .9rem; color: #9a8878; margin-top: 8px; }

/* === PRINT === */
@media print {
  .navbar, .footer, .wa-sabit, .yukari-btn, .cookie-banner, .yukleme { display: none !important; }
  body { background: #fff; color: #000; }
  .kart { box-shadow: none; border: 1px solid #ddd; }
}