/* ============================================================
   page-glows.css — Sayfa üstü 3D / Glow tasarım dili
   ------------------------------------------------------------
   Kaynak: index.html hero-3d-layer, --shadow-3d-* token'ları,
   radial gradient, glassmorphism ve showcase kart hover dili.
   Kural: dekoratif animasyonlar yalnızca transform/opacity;
   prefers-reduced-motion'da kapatılır. Okunabilirlik > süs.
   ============================================================ */

/* ------------------------------------------------------------
   0) 3D token'lar (index.html ile aynı adlar)
   ------------------------------------------------------------ */
:root {
  --shadow-3d-sm:
    0 1px 2px rgba(10, 60, 72, .06),
    0 6px 12px -4px rgba(10, 60, 72, .10),
    0 12px 24px -12px rgba(10, 60, 72, .12);
  --shadow-3d-md:
    0 2px 4px rgba(10, 60, 72, .06),
    0 12px 24px -8px rgba(10, 60, 72, .16),
    0 28px 56px -24px rgba(10, 60, 72, .20),
    0 48px 80px -48px rgba(10, 60, 72, .20);
  --shadow-3d-lg:
    0 4px 8px rgba(10, 60, 72, .07),
    0 20px 40px -12px rgba(10, 60, 72, .20),
    0 48px 88px -32px rgba(10, 60, 72, .26),
    0 80px 140px -64px rgba(10, 60, 72, .28);
  --shadow-3d-glow:
    0 0 0 1px rgba(15, 107, 124, .10),
    0 30px 60px -20px rgba(15, 107, 124, .42);

  /* Yerel aksan token'ları (marka petrol + altın) */
  --pg-accent: #0F6B7C;
  --pg-accent-2: #12879C;
  --pg-accent-soft: rgba(15, 107, 124, .12);
  --pg-gold: #C5923E;
  --pg-gold-soft: rgba(197, 146, 62, .14);
  --pg-ease: cubic-bezier(.2, .8, .2, 1);
}

[data-theme="dark"] {
  --shadow-3d-sm:
    0 1px 2px rgba(0, 0, 0, .4),
    0 6px 12px -4px rgba(0, 0, 0, .45),
    0 12px 24px -12px rgba(0, 0, 0, .5);
  --shadow-3d-md:
    0 2px 4px rgba(0, 0, 0, .45),
    0 12px 24px -8px rgba(0, 0, 0, .55),
    0 28px 56px -24px rgba(0, 0, 0, .6),
    0 48px 80px -48px rgba(0, 0, 0, .6);
  --shadow-3d-lg:
    0 4px 8px rgba(0, 0, 0, .5),
    0 20px 40px -12px rgba(0, 0, 0, .6),
    0 48px 88px -32px rgba(0, 0, 0, .7),
    0 80px 140px -64px rgba(0, 0, 0, .75);
  --shadow-3d-glow:
    0 0 0 1px rgba(42, 163, 184, .18),
    0 30px 60px -20px rgba(42, 163, 184, .35);

  --pg-accent: #2AA3B8;
  --pg-accent-2: #3FC0D6;
  --pg-accent-soft: rgba(42, 163, 184, .16);
  --pg-gold: #E0B562;
  --pg-gold-soft: rgba(224, 181, 98, .16);
}

/* ------------------------------------------------------------
   1) Sayfa-hero (küçük hero banner) — radial glow arka plan
   ------------------------------------------------------------ */
.pg-page-hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.pg-page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(760px 340px at 12% -30%, var(--pg-accent-soft), transparent 65%),
    radial-gradient(620px 300px at 92% -10%, var(--pg-gold-soft), transparent 70%);
}

/* Ders sayfası hero'suna yumuşak ışıma (index hero glow benzeri) */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(560px 300px at 88% -20%, rgba(42, 163, 184, .38), transparent 66%),
    radial-gradient(460px 260px at 6% 120%, rgba(245, 197, 66, .20), transparent 70%);
}

/* ------------------------------------------------------------
   2) Floating blob / halka dekoratif katman (index .h3d dili)
   ------------------------------------------------------------ */
.pg-hero-fx {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.pg-hero-fx .pg-ring,
.pg-hero-fx .pg-dot {
  position: absolute;
  display: block;
  will-change: transform;
}

.pg-hero-fx .pg-ring {
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .30);
  box-shadow: 0 0 30px rgba(94, 234, 212, .35), inset 0 0 24px rgba(94, 234, 212, .22);
}

.pg-hero-fx .r1 {
  width: 150px;
  height: 150px;
  top: 12%;
  right: 7%;
  border-color: rgba(245, 197, 66, .5);
  box-shadow: 0 0 38px rgba(245, 197, 66, .35), inset 0 0 34px rgba(245, 197, 66, .25);
  animation: pg-float-a 14s ease-in-out infinite;
}

.pg-hero-fx .r2 {
  width: 92px;
  height: 92px;
  top: 58%;
  right: 16%;
  animation: pg-float-b 11s ease-in-out infinite;
}

.pg-hero-fx .r3 {
  width: 56px;
  height: 56px;
  top: 24%;
  left: 5%;
  border-radius: 14px;
  animation: pg-float-c 13s ease-in-out infinite;
}

.pg-hero-fx .r4 {
  width: 14px;
  height: 14px;
  bottom: 18%;
  left: 13%;
  border: none;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #F5C542, #C5923E);
  box-shadow: 0 0 20px rgba(245, 197, 66, .8);
  animation: pg-float-d 9s ease-in-out infinite;
}

@keyframes pg-float-a {
  0%, 100% { transform: translate3d(0, 0, 0) rotateX(58deg) rotateY(0deg); }
  50%      { transform: translate3d(-20px, -26px, 40px) rotateX(58deg) rotateY(180deg); }
}

@keyframes pg-float-b {
  0%, 100% { transform: translate3d(0, 0, 0) rotateX(62deg) rotateY(0deg); }
  50%      { transform: translate3d(16px, -20px, 50px) rotateX(62deg) rotateY(-220deg); }
}

@keyframes pg-float-c {
  0%, 100% { transform: translate3d(0, 0, 0) rotateX(18deg) rotateY(22deg); }
  50%      { transform: translate3d(18px, 14px, 36px) rotateX(-22deg) rotateY(52deg); }
}

@keyframes pg-float-d {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50%      { transform: translate3d(-14px, -20px, 40px) scale(1.3); }
}

/* ------------------------------------------------------------
   3) glow-card — 3D hover lift + glow kenarlık
   ------------------------------------------------------------ */
.pg-glow-card {
  position: relative;
  background: var(--bg, #fff);
  border: 1px solid var(--border, #E2E8F0);
  border-radius: 14px;
  box-shadow: var(--shadow-3d-sm);
  transition:
    transform .35s var(--pg-ease),
    box-shadow .35s ease,
    border-color .3s ease;
}

.pg-glow-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-3d-lg);
  border-color: color-mix(in srgb, var(--pg-accent) 55%, transparent);
}

/* ------------------------------------------------------------
   4) glass-panel — cam efektli panel
   ------------------------------------------------------------ */
.pg-glass {
  background: color-mix(in srgb, var(--bg, #fff) 78%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.25);
  backdrop-filter: blur(14px) saturate(1.25);
  border: 1px solid color-mix(in srgb, var(--border, #E2E8F0) 75%, transparent);
  box-shadow: var(--shadow-3d-sm);
}

[data-theme="dark"] .pg-glass {
  background: color-mix(in srgb, var(--bg, #0F172A) 82%, transparent);
}

/* ------------------------------------------------------------
   5) gradient-border — 1px gradient kenarlık (mask tekniği)
   ------------------------------------------------------------ */
.pg-gradient-border {
  position: relative;
  border: none !important;
  background-clip: padding-box;
}

.pg-gradient-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--pg-accent) 70%, transparent),
    color-mix(in srgb, var(--pg-gold) 65%, transparent));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

/* ------------------------------------------------------------
   6) section-eyebrow — bölüm etiketi + gradient vurgu
   ------------------------------------------------------------ */
.pg-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--pg-accent);
  background: var(--pg-accent-soft);
  border: 1px solid color-mix(in srgb, var(--pg-accent) 28%, transparent);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 14px;
  box-shadow: 0 4px 14px -8px color-mix(in srgb, var(--pg-accent) 65%, transparent);
}

.pg-eyebrow::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pg-accent), var(--pg-gold));
  box-shadow: 0 0 8px color-mix(in srgb, var(--pg-accent) 70%, transparent);
}

/* Ders sayfası "Müfredat" etiketini eyebrow diline uyarla */
.section-head .label {
  color: var(--pg-accent);
  background: var(--pg-accent-soft);
  border: 1px solid color-mix(in srgb, var(--pg-accent) 30%, transparent);
  box-shadow: 0 4px 16px -8px color-mix(in srgb, var(--pg-accent) 70%, transparent);
  letter-spacing: .1em;
  font-weight: 800;
}

/* Başlık altı ince gradient çizgi */
.section-head h2 {
  position: relative;
  display: inline-block;
}

.section-head h2::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -10px;
  width: 64px;
  height: 3px;
  transform: translateX(-50%);
  border-radius: 3px;
  background: linear-gradient(90deg, var(--pg-accent), var(--pg-gold));
  opacity: .85;
}

/* ------------------------------------------------------------
   7) CTA glow — butonlarda parlama + parlama süpürmesi
   ------------------------------------------------------------ */
.btn-slayt-hero,
.btn-quiz {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  box-shadow: 0 10px 26px -10px rgba(10, 60, 72, .55);
}

.btn-slayt-hero:hover,
.btn-quiz:hover {
  box-shadow: var(--shadow-3d-glow);
}

.btn-slayt-hero::after,
.btn-quiz::after {
  content: '';
  position: absolute;
  top: 0;
  left: -80%;
  width: 55%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, .35), transparent);
  transform: skewX(-22deg);
  transition: left .55s var(--pg-ease);
  pointer-events: none;
}

.btn-slayt-hero:hover::after,
.btn-quiz:hover::after {
  left: 130%;
}

/* ------------------------------------------------------------
   8) Ders sayfası uygulaması — ünite kartlarına 3D dil
   ------------------------------------------------------------ */
.unit-item {
  box-shadow: var(--shadow-3d-sm);
  background: var(--bg, #fff);
}

.unit-item:hover {
  box-shadow: var(--shadow-3d-md);
  transform: translateY(-2px);
}

.unit-item.open {
  border-color: color-mix(in srgb, var(--pg-accent) 40%, transparent);
  box-shadow: var(--shadow-3d-md),
    0 0 0 1px color-mix(in srgb, var(--pg-accent) 14%, transparent);
}

.unit-item.open .unit-header {
  background: linear-gradient(90deg,
    color-mix(in srgb, var(--pg-accent) 7%, transparent),
    transparent 70%);
}

/* Açık ünite numarasına petrol vurgu */
.unit-item.open .unit-num {
  text-shadow: 0 0 18px color-mix(in srgb, var(--pg-accent) 55%, transparent);
}

/* Konu gövdesi paneli — hafif glow zemin */
.topic-card.active .topic-body {
  background: linear-gradient(180deg,
    color-mix(in srgb, var(--pg-accent) 4%, transparent),
    transparent 120px);
  border-radius: 0 0 var(--radius, 12px) var(--radius, 12px);
}

/* Hero istatistiklerine derinlik */
.hero-stats .stat {
  padding: 10px 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .14);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px -12px rgba(0, 0, 0, .5);
  transition: transform .3s var(--pg-ease), box-shadow .3s ease;
}

.hero-stats .stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px -12px rgba(0, 0, 0, .55);
}

/* ------------------------------------------------------------
   9) dersler.html — showcase kalitesinde kart / sim hover
   ------------------------------------------------------------ */
.courses-grid .course-card {
  box-shadow: var(--shadow-3d-sm);
  transform-style: preserve-3d;
}

.courses-grid .course-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(320px 140px at 50% -10%,
    color-mix(in srgb, var(--pg-accent) 16%, transparent),
    transparent 70%);
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}

.courses-grid .course-card:hover {
  transform: translateY(-8px) scale(1.015);
  box-shadow: var(--shadow-3d-lg);
  border-color: color-mix(in srgb, var(--pg-accent) 55%, transparent);
}

.courses-grid .course-card:hover::after {
  opacity: 1;
}

.courses-grid .course-card .card-icon {
  transition: transform .45s var(--pg-ease), filter .35s ease;
}

.courses-grid .course-card:hover .card-icon {
  transform: translateY(-4px) scale(1.16);
  filter: drop-shadow(0 8px 14px rgba(10, 60, 72, .28));
}

/* Simülasyon kartları (dersler.html) */
.sim-grid .sim-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border, #E2E8F0);
  border-radius: 16px;
  background: var(--surface, var(--bg, #fff));
  box-shadow: var(--shadow-3d-sm);
  transition:
    transform .35s var(--pg-ease),
    box-shadow .35s ease,
    border-color .3s ease;
}

.sim-grid .sim-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-3d-lg);
  border-color: color-mix(in srgb, var(--pg-accent) 55%, transparent);
}

.sim-grid .sim-card .sim-visual {
  transition: transform .5s var(--pg-ease);
}

.sim-grid .sim-card:hover .sim-visual {
  transform: scale(1.04);
}

/* Dersler sayfası üst bölümüne yumuşak glow zemin */
.pg-hero-lite {
  position: relative;
  overflow: hidden;
}

.pg-hero-lite::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(700px 300px at 50% -80px, var(--pg-accent-soft), transparent 70%),
    radial-gradient(520px 260px at 90% 40%, var(--pg-gold-soft), transparent 75%);
}

.pg-hero-lite > .container {
  position: relative;
  z-index: 1;
}

/* ------------------------------------------------------------
   10) Erişilebilirlik — reduced motion
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  .pg-hero-fx .pg-ring,
  .pg-hero-fx .pg-dot,
  .pg-hero-fx span {
    animation: none !important;
    will-change: auto;
  }

  .pg-glow-card:hover,
  .unit-item:hover,
  .courses-grid .course-card:hover,
  .sim-grid .sim-card:hover,
  .hero-stats .stat:hover {
    transform: none !important;
  }

  .btn-slayt-hero::after,
  .btn-quiz::after {
    display: none;
  }
}