/* ============================================================
   Nota Müzik Market — AŞAMA 1
   Mobile-first. 3D stack desktop'ta, ≤768px'te grid'e bozulur.
   ============================================================ */

:root {
  --bg: #fafafa;
  --bg-soft: #f3f3f1;
  --ink: #111111;
  --ink-2: #444444;
  --ink-3: #888888;
  --line: #e5e5e2;
  --card: #ffffff;
  --accent: #e63946;
  --accent-2: #f97316;

  --shadow-1: 0 12px 32px rgba(0,0,0,0.10);
  --shadow-2: 0 24px 64px rgba(0,0,0,0.14);
  --shadow-3: 0 32px 80px rgba(0,0,0,0.20);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 180ms;
  --t-med:  280ms;
  --t-slow: 520ms;

  --radius: 14px;
  --radius-sm: 8px;

  --header-h: 64px;

  --c-guitars: #e63946;
  --c-keys:    #5b8def;
  --c-drums:   #f97316;
  --c-strings: #a06cd5;
  --c-access:  #2a9d8f;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h);
  padding: 0 16px;
  padding-top: env(safe-area-inset-top, 0);
  background: rgba(250,250,250,0.0);
  transition: background var(--t-med) var(--ease), backdrop-filter var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(250,250,250,0.78);
  backdrop-filter: saturate(140%) blur(16px);
  -webkit-backdrop-filter: saturate(140%) blur(16px);
  border-bottom-color: var(--line);
}
.logo { display: flex; align-items: center; gap: 10px; letter-spacing: 0.04em; font-weight: 600; font-size: 13px; }
.logo-mark { font-size: 18px; color: var(--accent); }
.logo-text sup { font-size: 0.6em; opacity: 0.7; }
.site-nav { display: none; gap: 26px; font-size: 13px; font-weight: 500; letter-spacing: 0.02em; }
.site-nav a { color: var(--ink-2); transition: color var(--t-fast) var(--ease); }
.site-nav a:hover { color: var(--ink); }
.header-right { display: flex; align-items: center; gap: 4px; }

/* ---- header auth slot (desktop) ---- */
.auth-slot { display: none; align-items: center; gap: 10px; margin-right: 6px; }
.auth-slot[data-state="loading"] > * { visibility: hidden; }
[data-when][hidden] { display: none !important; }

.auth-link {
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--ink-2);
  background: transparent;
  border: 0;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.auth-link:hover { color: var(--ink); background: var(--bg-soft); }
.auth-link-primary {
  color: #2b1610;
  font-weight: 700;
  background-image: linear-gradient(135deg, #c9a060 0%, #f5dc9b 38%, #e8c870 60%, #b88b3a 100%);
  background-size: 180% 180%;
  background-position: 50% 50%;
  box-shadow: 0 6px 16px rgba(184, 139, 58, 0.22);
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease), background-position var(--t-med) var(--ease);
}
.auth-link-primary:hover {
  color: #2b1610;
  background: linear-gradient(135deg, #c9a060 0%, #f5dc9b 38%, #e8c870 60%, #b88b3a 100%);
  background-position: 100% 0%;
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(184, 139, 58, 0.30);
}
.fav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  color: var(--ink-2);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.fav-link:hover { color: var(--accent); background: var(--bg-soft); }

.account-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  padding: 8px 6px;
  position: relative;
  transition: color var(--t-fast) var(--ease);
}
.account-link::after {
  content: "";
  position: absolute;
  left: 6px; right: 6px; bottom: 4px;
  height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-fast) var(--ease);
}
.account-link:hover::after { transform: scaleX(1); }
.logout-link {
  font: inherit;
  font-size: 12px;
  color: var(--ink-3);
  background: transparent;
  border: 0;
  padding: 8px 6px;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease);
}
.logout-link:hover { color: var(--accent); }
.hamburger {
  width: 44px; height: 44px;
  display: inline-flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 5px;
  border-radius: 999px;
  transition: background var(--t-fast) var(--ease);
}
.hamburger span {
  display: block;
  width: 18px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--t-med) var(--ease), opacity var(--t-fast) var(--ease);
  transform-origin: center;
}
.hamburger:hover { background: rgba(0,0,0,0.05); }
.hamburger:active { transform: scale(0.95); }
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.cart-btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: 999px;
  transition: background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.cart-btn:hover { background: rgba(0,0,0,0.05); }
.cart-btn:active { transform: scale(0.96); }
.cart-badge {
  position: absolute; top: 4px; right: 4px;
  min-width: 18px; height: 18px; padding: 0 5px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
  background: var(--accent); color: #fff;
  font-size: 10px; font-weight: 700;
  transform: scale(0); opacity: 0;
  transition: transform var(--t-med) var(--ease), opacity var(--t-fast) var(--ease);
  pointer-events: none;
}
.cart-btn.has-items .cart-badge { transform: scale(1); opacity: 1; }
.cart-btn.bump { animation: cartBump 380ms var(--ease); }
@keyframes cartBump {
  0%   { transform: scale(1); }
  35%  { transform: scale(1.18); }
  100% { transform: scale(1); }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: flex-start;
  padding: calc(var(--header-h) + 16px) 20px 40px;
  position: relative;
  overflow: hidden;
}
.hero-inner { position: relative; z-index: 1; max-width: 1100px; width: 100%; margin: 0 auto; }

/* Hero görseli — sağ üst köşeye tam oturur, sayfa açılınca sağdan slide-in */
.hero-img {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: auto;
  max-width: 60%;
  object-fit: contain;
  object-position: right top;
  pointer-events: none;
  z-index: 0;
  user-select: none;
  -webkit-user-drag: none;
  animation: heroSlideIn 1.4s cubic-bezier(0.22, 1, 0.36, 1) both;
  /* Alt kısmında beyaza yumuşak fade — hero zeminine karışır */
  -webkit-mask-image: linear-gradient(to bottom, #000 72%, transparent 100%);
          mask-image: linear-gradient(to bottom, #000 72%, transparent 100%);
}
@keyframes heroSlideIn {
  0%   { transform: translateX(100%); opacity: 0; }
  100% { transform: translateX(0); opacity: 1; }
}
@media (max-width: 768px) {
  .hero-img { display: none; }
  .card { width: clamp(170px, 55vw, 240px); }
  /* Mobilde silindir bölgesi tek ekran — sticky/runway yok, dikey scroll sayfaya yansır */
  .stack-section {
    height: 100vh !important;
    /* touch-action default (auto): dikey scroll browser tarafından, yatay swipe JS handler tarafından preventDefault ile yakalanır */
  }
  .stack-sticky {
    position: static;
    height: 100%;
  }
}
@media (prefers-reduced-motion: reduce) {
  .hero-img { animation: none; }
}
.eyebrow { margin: 0 0 18px; font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-3); }
.hero-title {
  margin: 0;
  font-size: clamp(48px, 13vw, 168px);
  line-height: 0.92;
  letter-spacing: -0.04em;
  font-weight: 700;
  /* Krem-altın gitar dokusu: parlaklık + gölge geçişleri */
  background-image: linear-gradient(135deg,
    #8b6720 0%,
    #c9a060 18%,
    #f5dc9b 35%,
    #e8c870 50%,
    #b88b3a 65%,
    #f0d896 82%,
    #9e7c44 100%);
  background-size: 200% 200%;
  background-position: 50% 50%;
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
          text-fill-color: transparent;
  color: transparent;
  filter: drop-shadow(0 6px 14px rgba(120, 90, 30, 0.18));
  animation: titleShimmer 9s ease-in-out infinite;
}
@keyframes titleShimmer {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-title { animation: none; }
}
.hero-sub {
  margin: 22px 0 36px;
  max-width: 520px;
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--ink-2);
}
.scroll-cue {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: #4f1e23;
  padding: 8px 4px;
}
.scroll-cue svg { animation: mouseDot 1.8s ease-in-out infinite; }
@keyframes mouseDot {
  0%   { transform: translateY(0); opacity: 1; }
  50%  { transform: translateY(6px); opacity: 0.4; }
  100% { transform: translateY(0); opacity: 1; }
}

/* ============================================================
   3D STACK SAHNESİ
   stack-section: dış sarmal → uzun runway sağlar
   stack-sticky:  position:sticky ile ekrana sabitlenir
   scene:         perspective container
   card:          absolute, 3D transform'larla yerleşir
   ============================================================ */
.stack-section {
  position: relative;
  /* JS run-time'da --runway custom prop ile yüksekliği ayarlanır */
  height: var(--runway, 500vh);
}
.stack-sticky {
  position: sticky; top: 0;
  height: 100vh;
  width: 100%;
  overflow: hidden;
}
.scene {
  position: absolute; inset: 0;
  perspective: 1800px;
  perspective-origin: 50% 42%;
  transform-style: preserve-3d;
}

.card {
  position: absolute;
  left: 50%;
  top: 50%;
  width: clamp(200px, 68vw, 320px);
  aspect-ratio: 3 / 4;
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  cursor: pointer;
  /* JS custom props ile sürülür */
  --tx: 0px;
  --ty: 0px;
  --z: -2000px;
  --scale: 0.6;
  --blur: 8px;
  --opacity: 0;
  transform: translate3d(calc(-50% + var(--tx)), calc(-50% + var(--ty)), var(--z)) scale(var(--scale));
  filter: blur(var(--blur));
  opacity: var(--opacity);
  will-change: transform, filter, opacity;
  transition:
    box-shadow var(--t-med) var(--ease);
  backface-visibility: hidden;
}
.card:hover { box-shadow: var(--shadow-3); }
.card.is-active .card-inner { transform: translateY(-10px); }
.card-inner {
  width: 100%; height: 100%;
  display: flex; flex-direction: column;
  transition: transform var(--t-med) var(--ease);
}
.card-media {
  flex: 1 1 auto;
  position: relative;
  background: var(--c-1, #333);
  overflow: hidden;
}
.card-media::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(58% 44% at 22% 18%, var(--c-2, #666) 0%, transparent 65%),
    linear-gradient(180deg, transparent 55%, rgba(0,0,0,0.32) 100%);
  pointer-events: none;
  z-index: 0;
}
.card-media > * { position: relative; z-index: 1; }
.card-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
  z-index: 2;
}
.card-media .placeholder-glyph {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: clamp(80px, 18vw, 180px);
  color: rgba(255,255,255,0.96);
  letter-spacing: -0.06em;
  font-weight: 800;
  text-shadow: 0 10px 32px rgba(0,0,0,0.28);
  pointer-events: none;
  z-index: 1;
}
.card-tag { z-index: 2; }
.card-tag {
  position: absolute; top: 14px; left: 14px;
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  background: rgba(255,255,255,0.92);
  color: var(--ink);
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 600;
}
.card-meta {
  flex: 0 0 auto;
  padding: 16px 18px 18px;
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 12px;
}
.card-name {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.25;
}
.card-price {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

.stack-meta {
  position: absolute; left: 20px; bottom: 20px;
  display: flex; align-items: center; gap: 14px;
  font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-3);
  z-index: 2;
}
.stack-counter { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }

/* ============================================================
   SCENE: state geçişlerinde fade
   ============================================================ */
.scene { transition: opacity 260ms var(--ease); }
.scene.is-fading { opacity: 0; }

/* ============================================================
   KATEGORİ KARTI — kart kabuğu yok, sadece şeffaf enstrüman görseli
   Hover'da kategori adı + ürün sayısı overlay
   ============================================================ */
.card.is-cat {
  background: transparent;
  box-shadow: none;
  border-radius: 0;
  overflow: visible;
}
.card.is-cat .card-inner {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
}
.card.is-cat .card-media {
  position: absolute;
  inset: 0;
  background: transparent;
  overflow: visible;
}
.card.is-cat .card-media::before { display: none; }
.card.is-cat .card-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  padding: 6%;
  filter: drop-shadow(0 18px 28px rgba(0,0,0,0.18));
  transition: filter var(--t-med) var(--ease), transform var(--t-med) var(--ease);
}
.card.is-cat:hover .card-media img {
  filter: drop-shadow(0 26px 38px rgba(0,0,0,0.24));
  transform: translateY(-6px);
}
.card.is-cat .card-tag,
.card.is-cat .placeholder-glyph,
.card.is-cat .card-meta { display: none; }

.card-overlay {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 14px 4px 4px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 240ms var(--ease), transform 240ms var(--ease);
  pointer-events: none;
}
/* Sadece silindirin önünde olan kart için overlay görünür */
.card.is-cat.is-front .card-overlay {
  opacity: 1;
  transform: translateY(0);
}
.card-overlay-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.card-overlay-count {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #652d2d;
  white-space: nowrap;
}
@media (hover: none) {
  .card.is-cat.is-front .card-overlay { padding: 10px 2px 0; }
  .card-overlay-name { font-size: 15px; }
  .card-overlay-count { font-size: 12px; }
}

/* ============================================================
   STACK HEADER (geri dön + kategori adı)
   ============================================================ */
.stack-header {
  position: absolute;
  top: calc(var(--header-h) + 14px);
  left: 20px;
  right: 20px;
  z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  pointer-events: none;
}
.back-btn {
  pointer-events: auto;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.86);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border: 1px solid var(--line);
  font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; font-weight: 600;
  color: var(--ink);
  transition: background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
  min-height: 44px;
}
.back-btn:hover { background: #fff; transform: translateX(-2px); }
.stack-cat-name {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink);
  font-weight: 700;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  margin-top: 80px;
  padding: 60px 20px 40px;
  padding-bottom: calc(40px + env(safe-area-inset-bottom, 0));
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 24px;
}
.footer-logo { margin: 0 0 6px; font-weight: 600; letter-spacing: 0.04em; font-size: 13px; }
.footer-tag { margin: 0; color: var(--ink-3); font-size: 13px; }
.footer-social { display: flex; gap: 16px; }
.footer-social a {
  font-size: 13px; color: var(--ink-2);
  transition: color var(--t-fast) var(--ease);
}
.footer-social a:hover { color: var(--ink); }

/* ============================================================
   PRODUCT PANEL (sağdan slide-in)
   ============================================================ */
.panel-backdrop {
  position: fixed; inset: 0;
  z-index: 90;
  background: rgba(10,10,10,0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity var(--t-med) var(--ease);
}
.panel-backdrop.is-open { opacity: 1; }

.product-panel {
  position: fixed;
  top: 0; right: 0;
  width: 100%;
  max-width: 760px;
  height: 100%;
  background: var(--card);
  z-index: 100;
  transform: translateX(100%);
  transition: transform var(--t-slow) var(--ease);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: flex; flex-direction: column;
  box-shadow: -24px 0 64px rgba(0,0,0,0.18);
}
.product-panel.is-open { transform: translateX(0); }

.panel-close {
  position: absolute; top: 12px; right: 12px;
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
  background: rgba(255,255,255,0.9);
  color: var(--ink);
  z-index: 5;
  transition: background var(--t-fast) var(--ease);
}
.panel-close:hover { background: rgba(0,0,0,0.06); }

.panel-grid {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: 1fr;
}
.panel-media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--c-1, #333);
  overflow: hidden;
}
.panel-media::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(58% 44% at 22% 18%, var(--c-2, #666) 0%, transparent 65%),
    linear-gradient(180deg, transparent 55%, rgba(0,0,0,0.32) 100%);
  pointer-events: none;
  z-index: 0;
}
.panel-media img { width: 100%; height: 100%; object-fit: cover; position: relative; z-index: 2; }

/* çoklu görsel galerisi */
.panel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 0; border-radius: 50%;
  background: rgba(255,255,255,0.82);
  color: #111;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0,0,0,0.18);
  transition: background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.panel-nav:hover { background: #fff; }
.panel-nav.prev { left: 12px; }
.panel-nav.next { right: 12px; }
.panel-dots {
  position: absolute;
  left: 0; right: 0; bottom: 12px;
  z-index: 4;
  display: flex; justify-content: center; gap: 7px;
}
.panel-dot {
  width: 8px; height: 8px; padding: 0;
  border: 0; border-radius: 50%;
  background: rgba(255,255,255,0.55);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.panel-dot.is-active { background: #fff; transform: scale(1.3); }
.panel-media .placeholder-glyph {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: clamp(100px, 20vw, 240px);
  color: rgba(255,255,255,0.96);
  letter-spacing: -0.06em;
  font-weight: 800;
  text-shadow: 0 12px 36px rgba(0,0,0,0.28);
  z-index: 1;
}
.panel-body { padding: 28px 24px 32px; }
.panel-cat {
  margin: 0 0 12px;
  font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
}
.panel-title {
  margin: 0;
  font-size: clamp(24px, 4vw, 36px);
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-weight: 700;
}
.panel-price {
  margin: 14px 0 0;
  font-size: clamp(22px, 3vw, 28px);
  color: var(--accent);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.panel-stock {
  margin: 8px 0 18px;
  font-size: 13px;
  color: var(--ink-2);
  display: inline-flex; align-items: center; gap: 8px;
}
.panel-stock .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #2a9d8f;
}
.panel-stock.is-out .dot { background: var(--accent); }
.panel-desc {
  margin: 0 0 24px;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.6;
}
.qty-row {
  display: flex; align-items: center; justify-content: space-between;
  margin: 18px 0 22px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.qty-label {
  font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3); font-weight: 600;
}
.qty-stepper {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
}
.qty-btn {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  transition: background var(--t-fast) var(--ease);
  min-width: 44px; min-height: 44px;
}
@media (min-width: 768px) {
  .qty-btn { min-width: 36px; min-height: 36px; }
}
.qty-btn:hover { background: rgba(0,0,0,0.05); }
.qty-value {
  min-width: 36px; text-align: center;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.panel-actions {
  display: flex; align-items: stretch; gap: 10px;
}
.btn-primary {
  flex: 1 1 auto;
  height: 54px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 15px; font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.btn-primary:hover { background: #2a2a2a; }
.btn-primary:active { transform: scale(0.98); }
.btn-primary[disabled] {
  background: var(--ink-3);
  cursor: not-allowed;
  opacity: 0.7;
}
.btn-icon {
  width: 54px; height: 54px;
  border-radius: 999px;
  border: 1px solid var(--line);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--ink-2);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.btn-icon:hover { color: var(--accent); border-color: var(--accent); }
.btn-icon[aria-pressed="true"] {
  color: var(--accent);
  background: rgba(230,57,70,0.08);
  border-color: var(--accent);
}
.btn-icon[aria-pressed="true"] svg { fill: currentColor; }

/* ============================================================
   MOBİL MENÜ (slide-in)
   ============================================================ */
.mobile-menu-backdrop {
  position: fixed; inset: 0;
  z-index: 70;
  background: rgba(10,10,10,0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity var(--t-med) var(--ease);
}
.mobile-menu-backdrop.is-open { opacity: 1; }

.mobile-menu {
  position: fixed;
  top: 0; right: 0;
  width: 88%; max-width: 360px;
  height: 100%;
  background: var(--card);
  z-index: 80;
  transform: translateX(100%);
  transition: transform var(--t-slow) var(--ease);
  display: flex; flex-direction: column;
  padding: 28px 28px 32px;
  padding-top: calc(env(safe-area-inset-top, 0) + 28px);
  padding-bottom: calc(env(safe-area-inset-bottom, 0) + 32px);
  box-shadow: -24px 0 64px rgba(0,0,0,0.18);
}
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu-close {
  position: absolute; top: 12px; right: 12px;
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
  color: var(--ink);
  transition: background var(--t-fast) var(--ease);
}
.mobile-menu-close:hover { background: rgba(0,0,0,0.06); }
.mobile-menu-eyebrow {
  margin: 16px 0 24px;
  font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
}
.mobile-menu-nav {
  display: flex; flex-direction: column;
  border-top: 1px solid var(--line);
  flex: 1 1 auto;
}
.mobile-menu-nav a {
  padding: 18px 4px;
  font-size: 20px;
  letter-spacing: -0.01em;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px;
  transition: color var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}
.mobile-menu-nav a::after {
  content: "→";
  color: var(--ink-3);
  font-weight: 400;
  font-size: 18px;
  transition: transform var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.mobile-menu-nav a:hover { color: var(--accent); padding-left: 8px; }
.mobile-menu-nav a:hover::after { color: var(--accent); transform: translateX(4px); }
.mobile-menu-foot {
  display: flex; align-items: center; gap: 10px;
  margin-top: 24px;
  font-size: 12px;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--ink-3);
}
.mobile-menu-mark { color: var(--accent); font-size: 16px; }
.mobile-menu-foot sup { font-size: 0.6em; opacity: 0.7; }

/* ---- mobil menü auth bölümü ---- */
.mobile-menu-auth {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 0 4px;
}
.mobile-menu-auth[data-state="loading"] > * { visibility: hidden; }
.mobile-menu-auth .auth-link,
.mobile-menu-auth .account-link,
.mobile-menu-auth .logout-link {
  width: 100%;
  text-align: center;
  font-size: 15px;
  padding: 14px 16px;
  border-radius: 8px;
  min-height: 48px;
  box-sizing: border-box;
}
.mobile-menu-auth .auth-link {
  border: 1px solid var(--line);
  color: var(--ink);
}
.mobile-menu-auth .auth-link-primary { border: 0; }
.mobile-menu-auth .account-link {
  background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center;
}
.mobile-menu-auth .account-link::after { content: none; }
.mobile-menu-auth .logout-link {
  border: 1px solid var(--line);
}

/* ---- mini toast bildirim ---- */
.nm-toast {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 24px);
  transform: translate(-50%, 16px);
  z-index: 1200;
  max-width: calc(100vw - 32px);
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  background: rgba(17, 17, 17, 0.94);
  border-radius: 8px;
  box-shadow: var(--shadow-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease);
}
.nm-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}
@media (prefers-reduced-motion: reduce) {
  .nm-toast { transition: opacity var(--t-fast) linear; transform: translate(-50%, 0); }
}

/* ============================================================
   FLY-TO-CART animasyon katmanı
   ============================================================ */
.fly-layer {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 95;
  overflow: hidden;
}
.fly-item {
  position: absolute;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-2);
  background: var(--card);
  overflow: hidden;
  transition: transform 720ms var(--ease), opacity 720ms var(--ease);
  will-change: transform, opacity;
}

/* ============================================================
   GRID FALLBACK (mobil + reduced-motion)
   3D yerine düz grid
   ============================================================ */
body.is-grid .stack-section {
  height: auto !important;
}
body.is-grid .stack-sticky {
  position: static;
  height: auto;
  overflow: visible;
  padding: calc(var(--header-h) + 16px) 16px 64px;
}
body.is-grid .stack-header {
  position: static;
  top: auto; left: auto; right: auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 4px 4px 18px;
  margin: 0 auto 4px;
  max-width: 1100px;
  width: 100%;
}
body.is-grid .scene {
  position: static;
  perspective: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
}
body.is-grid .card {
  position: static;
  width: 100%;
  aspect-ratio: 4 / 5;
  transform: none !important;
  filter: none !important;
  opacity: 1 !important;
}
body.is-grid .stack-meta { display: none; }
body.is-grid .scene.is-fading { opacity: 0.35; }

/* ============================================================
   PANEL — mobilde sticky bottom CTA
   ============================================================ */
.panel-actions {
  position: sticky;
  bottom: 0;
  background: var(--card);
  margin: 0 -24px -32px;
  padding: 14px 24px;
  padding-bottom: calc(14px + env(safe-area-inset-bottom, 0));
  border-top: 1px solid var(--line);
  z-index: 5;
}

/* ============================================================
   MEDIA QUERIES
   ============================================================ */
@media (min-width: 768px) {
  body { font-size: 16px; }
  .site-header { padding: 0 32px; }
  .site-nav { display: inline-flex; }
  .auth-slot { display: flex; }
  .hamburger { display: none; }
  .hero { padding: calc(var(--header-h) + 40px) 40px 60px; }
  .footer-inner { flex-direction: row; align-items: center; justify-content: space-between; }
  .panel-grid { grid-template-columns: 1.1fr 1fr; }
  .panel-media { aspect-ratio: auto; height: 100%; }
  .panel-body { padding: 56px 48px; }
  .stack-header { left: 32px; right: 32px; }
  .panel-actions {
    position: static;
    background: transparent;
    margin: 0;
    padding: 0;
    border-top: 0;
  }
}

@media (min-width: 1024px) {
  .card { width: clamp(280px, 26vw, 360px); }
  .hero { padding: calc(var(--header-h) + 60px) 56px 80px; }
}

/* Reduced motion → tüm hareketleri minimuma çek + grid fallback */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* Print/screenreader safety */
[hidden] { display: none !important; }