/* ============================================
   PAKTOLOS TASARIM SİSTEMİ — BİLEŞENLER

   Yalnızca tokenlar.css değişkenlerini kullanır. Her bileşenin canlı
   örneği tasarim.html'de. Sayfaya özel stiller style.css'te kalır.

   İçindekiler
     1. Temel yerleşim: .sayfa-genis, .okuma, .ızgara-12
     2. Menü: .nav-bar, .nav, .nav-actions, .tabbar
     3. Alt bilgi
     4. Yazı: .overline, .baslik-*, .govde
     5. Düğmeler: .btn, .icon-btn
     6. Rozet ve etiket: .badge, .tag
     7. Kartlar: .card, .article-card, .concept-card, .data-card
     8. Sayı: .stat, .metric
     9. Bölüm başlığı ve hero: .section-header, .sayfa-hero
    10. Gezinti: .breadcrumbs, .tabs
    11. Açılır: .ipucu (tooltip), .popover, .accordion
    12. İlerleme: .progress, .progress-ring
    13. Form: .toggle, .slider-v2
    14. Öğrenme blokları: .key-takeaway, .concept-definition,
        .simple-explanation, .deep-dive, .ilgili, .source
    15. Anlam deseni: .anlam ("Bu ne anlama geliyor?")
    16. Durumlar: .empty-state, .error-state, .skeleton
    17. Simgeler
    18. Okuma listesi: .kaydet-btn, .sayfa-eylem, .okuma-listesi, .son-bakilan
    19. Erişim: .atla (içeriğe geç)
    20. Işık huzmesi: .isikli, .isikli-yesil, .isikli-mor
    21. Kelime kelime başlık: .kelimeli
    22. Yüzen parça: [data-yuzen], .salinim
    23. Sekmeli liste: .sekmeli [data-sekmeli]
    24. Kayan şerit: .serit [data-serit]
   ============================================ */

/* ---------- 1. Yerleşim ---------- */
.sayfa-genis { max-width: calc(var(--width-page) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.sayfa-veri { max-width: calc(var(--width-data) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.okuma-genislik { max-width: calc(var(--width-article) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }

.izgara {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--s-24);
}
.izgara > * { grid-column: span 12; }
.izgara .k-12 { grid-column: span 12; }
@media (min-width: 768px) {
  .izgara .k-6 { grid-column: span 6; }
  .izgara .k-4 { grid-column: span 6; }
  .izgara .k-8 { grid-column: span 12; }
}
@media (min-width: 1100px) {
  .izgara .k-3 { grid-column: span 3; }
  .izgara .k-4 { grid-column: span 4; }
  .izgara .k-5 { grid-column: span 5; }
  .izgara .k-7 { grid-column: span 7; }
  .izgara .k-8 { grid-column: span 8; }
}
.bolum { padding-block: clamp(64px, 8vw, 128px); }
.bolum + .bolum { padding-top: 0; }
.bolum-ayrac { border-top: 0; }  /* bölümler çizgiyle değil boşlukla ayrılır */

/* ---------- 2. Menü ---------- */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  background: color-mix(in srgb, var(--background) 78%, transparent);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border-bottom: 1px solid transparent;
  transition: border-color var(--motion-normal) var(--ease);
}
.nav-bar.scrolled { border-bottom-color: var(--border); }
.container.nav-inner,
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-24);
  height: 100%;
  max-width: calc(var(--width-page) + 2 * var(--gutter));
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: var(--touch);
  font-size: 15px;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.14em;
  color: var(--text-primary);
  text-decoration: none;
}
/* Logo: ilk Lidya sikkesinin damgalı arka yüzü. Markanın turuncusu
   yalnızca burada ve hikâye çizimlerinde kullanılır. */
.logo-mark {
  width: 22px;
  height: 22px;
  flex: none;
  fill: var(--brand);
  transition: transform var(--motion-slow) var(--ease);
}
.logo:hover .logo-mark { transform: rotate(-12deg); }

.nav-end { display: flex; align-items: center; gap: var(--s-32); }
.nav { display: flex; align-items: center; gap: var(--s-4); }
.nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 var(--s-12);
  border-radius: var(--radius-full);
  font-size: var(--text-small);
  font-weight: var(--weight-book);
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease), background var(--motion-fast) var(--ease);
}
.nav a:hover { background: var(--accent-soft); }
.nav-cta { margin-left: var(--s-8); }
.nav a[aria-current="page"] { color: var(--text-primary); }
.nav-hap {
  position: absolute;
  left: var(--s-12);
  right: var(--s-12);
  bottom: 2px;
  height: 1.5px;
  border-radius: 1px;
  background: var(--text-primary);
}

.nav-actions { display: flex; align-items: center; gap: var(--s-4); }
.search-trigger,
.nav-profil {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-8);
  min-width: var(--touch);
  height: var(--touch);
  padding: 0 var(--s-8);
  border: 0;
  border-radius: var(--radius-m);
  background: none;
  color: var(--text-secondary);
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease), background var(--motion-fast) var(--ease);
}
.search-trigger:hover, .nav-profil:hover { color: var(--text-primary); background: var(--surface-secondary); }
.nav-profil[aria-current="page"] { color: var(--accent); }
.search-trigger svg, .nav-profil svg { width: 20px; height: 20px; }
.nav-kbd {
  padding: 2px 6px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  font: var(--weight-medium) 11px/1.4 var(--font-sans);
  color: var(--text-muted);
}

/* Telefonda alt çubuk: ekrana yapışık, sade; etkin sekmenin üstündeki çizgi
   sayfa geçişinde yeni sekmeye kayar (style.css, SAYFA GEÇİŞİ). */
.tabbar { display: none; }

@media (max-width: 767px) {
  .nav, .nav-kbd, .nav-actions .nav-cta { display: none; }
  .nav-end { gap: 0; }
  .search-trigger { padding: 0; }

  .tabbar {
    position: fixed;
    inset: auto 0 0 0;
    z-index: var(--z-tabbar);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    height: calc(var(--tabbar-height) + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: color-mix(in srgb, var(--background) 82%, transparent);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
    border-top: 1px solid var(--border);
  }
  .tabbar a {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    min-height: var(--touch);
    font-size: 10.5px;
    font-weight: var(--weight-medium);
    letter-spacing: 0;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--motion-fast) var(--ease);
  }
  .tabbar a[aria-current="page"] { color: var(--text-primary); }
  .tabbar svg { width: 24px; height: 24px; }
  .tab-hap {
    position: absolute;
    top: -1px;
    left: 30%;
    right: 30%;
    height: 2px;
    border-radius: 0 0 2px 2px;
    background: var(--text-primary);
  }
  body { padding-bottom: calc(var(--tabbar-height) + env(safe-area-inset-bottom)); }
}

/* ---------- 3. Alt bilgi ---------- */
footer {
  padding: var(--s-80) 0 var(--s-48);
  background: var(--background-alt);
}
.container.footer-inner,
.footer-inner { display: grid; gap: var(--s-64); max-width: calc(var(--width-page) + 2 * var(--gutter)); }
.footer-top { display: grid; grid-template-columns: minmax(160px, 1fr) 4fr; gap: var(--s-48); align-items: start; }
.footer-logo { min-height: var(--touch); }
.footer-cols { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--s-32); }
.footer-cols h2 {
  margin: 0 0 var(--s-12);
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  font-weight: var(--weight-semibold);
  letter-spacing: 0;
  color: var(--text-primary);
}
.footer-cols a {
  display: block;
  padding: 6px 0;
  font-size: var(--text-small);
  color: var(--text-secondary);
  text-decoration: none;
}
.footer-cols a:hover { color: var(--text-primary); }
.footer-bottom { display: grid; gap: var(--s-16); padding-top: var(--s-24); border-top: 1px solid var(--border); }
.footer-bottom p { max-width: 72ch; font-size: var(--text-caption); line-height: 1.55; color: var(--text-secondary); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s-16); font-size: var(--text-caption); color: var(--text-muted); }
.theme-switch button { padding: 6px 12px; font-size: var(--text-caption); }
@media (max-width: 1099px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: var(--s-32); }
}
@media (max-width: 767px) {
  footer { padding-top: var(--s-48); }
  .footer-inner { gap: var(--s-48); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 4. Yazı ---------- */
/* Sessiz etiket: büyük harf ya da rozet değil, küçük gri yazı ("Ekonomi ›") */
.overline {
  display: block;
  margin-bottom: var(--s-12);
  font-size: var(--text-overline);
  font-weight: var(--weight-book);
  letter-spacing: var(--tracking-overline);
  color: var(--text-muted);
}
.overline-ok::after { content: " ›"; }
a.overline { display: inline-flex; align-items: center; justify-self: start; min-height: var(--touch); margin-bottom: 0; text-decoration: none; }
a.overline:hover { color: var(--text-primary); }

/* Başlıklar: serif, her boyutta 400; bir iki kelime eğik vurgulanabilir */
.serif { font-family: var(--font-serif); font-weight: var(--weight-regular); }
.serif em, h1 em, h2 em { font-style: italic; }
.baslik-hero { font-family: var(--font-serif); font-size: var(--text-hero); font-weight: var(--weight-regular); line-height: var(--leading-tight); letter-spacing: var(--tracking-display); }
.baslik-bolum { font-family: var(--font-serif); font-size: var(--text-section); font-weight: var(--weight-regular); line-height: var(--leading-tight); letter-spacing: var(--tracking-heading); }
.baslik-makale { font-family: var(--font-serif); font-size: var(--text-article); font-weight: var(--weight-regular); line-height: var(--leading-tight); letter-spacing: var(--tracking-heading); }
.baslik-alt { font-size: var(--text-subheading); font-weight: var(--weight-medium); line-height: 1.18; letter-spacing: -0.009em; }
.govde-giris { font-size: var(--text-lead); line-height: 1.5; color: var(--text-secondary); letter-spacing: var(--tracking-body); }
.govde { font-size: var(--text-body); line-height: var(--leading-body); }
.govde-kucuk { font-size: var(--text-small); line-height: 1.55; color: var(--text-secondary); }
.sayisal { font-variant-numeric: tabular-nums; }

/* ---------- 5. Düğmeler ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-8);
  min-height: var(--touch);
  padding: 0 var(--s-24);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font: var(--weight-regular) 1rem/1 var(--font-sans);
  letter-spacing: 0;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease), color var(--motion-fast) var(--ease), border-color var(--motion-fast) var(--ease), transform var(--motion-instant) var(--ease);
}
.btn:active { transform: scale(0.98); }
.btn-birincil { background: var(--text-primary); color: var(--background); }
.btn-birincil:hover { background: color-mix(in srgb, var(--text-primary) 86%, var(--background)); }
.btn-vurgu { background: var(--accent); color: var(--text-on-accent); }
.btn-vurgu:hover { background: var(--accent-hover); }
/* İkincil: sis grisi hap ("Daha fazla →"); çerçeveli: ince mürekkep çizgi */
.btn-ikincil { background: var(--surface); color: var(--text-primary); }
.btn-ikincil:hover { background: var(--surface-secondary); }
.btn-cerceve { background: transparent; color: var(--text-primary); border-color: var(--text-primary); }
.btn-cerceve:hover { background: var(--accent-soft); }
/* Sade: yalnızca yazı ve ok; çizgi yalnızca üzerine gelince */
.btn-sade { background: none; color: var(--text-primary); padding-inline: var(--s-8); }
.btn-sade:hover { text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
.ok-sonu::after { content: "→"; display: inline-block; margin-left: 6px; transition: transform var(--motion-fast) var(--ease); }
.ok-sonu:hover::after { transform: translateX(3px); }
.btn-kucuk { min-height: 36px; padding: 0 var(--s-16); font-size: var(--text-small); }
.btn[disabled] { opacity: 0.4; pointer-events: none; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: var(--touch);
  height: var(--touch);
  border: 0;
  border-radius: var(--radius-full);
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease), color var(--motion-fast) var(--ease);
}
.icon-btn:hover { background: var(--surface-secondary); color: var(--text-primary); }
.icon-btn[aria-pressed="true"] { color: var(--accent); }
.icon-btn svg { width: 20px; height: 20px; }

/* ---------- 6. Rozet ve etiket ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--surface-secondary);
  font-size: var(--text-overline);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}
.badge-vurgu { background: var(--accent-soft); color: var(--accent); }
.badge-olumlu { background: var(--positive-soft); color: var(--positive); }
.badge-olumsuz { background: var(--negative-soft); color: var(--negative); }
.badge-dikkat { background: var(--caution-soft); color: var(--caution); }
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 var(--s-12);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  background: var(--surface);
  font-size: var(--text-small);
  color: var(--text-primary);
  text-decoration: none;
  transition: border-color var(--motion-fast) var(--ease), background var(--motion-fast) var(--ease);
}
a.tag:hover { background: var(--surface-secondary); }

/* ---------- 7. Kartlar ---------- */
/* Kart: sis grisi, düz, gölgesiz, 24 px köşe */
.card {
  position: relative;
  padding: var(--s-24);
  border-radius: var(--radius-l);
  background: var(--surface);
}
a.card { display: flex; flex-direction: column; gap: var(--s-8); color: inherit; text-decoration: none; transition: background var(--motion-normal) var(--ease), transform var(--motion-normal) var(--ease); }
a.card:hover { background: var(--surface-secondary); }
.card-sade { background: var(--background-alt); box-shadow: inset 0 0 0 1px var(--border); }
/* Şeftali kart: sayfanın tek sıcak vurgusu; üzerinde kahve mürekkep */
.card-seftali { background: var(--peach); color: var(--peach-ink); }
.card-seftali p, .card-seftali .overline, .card-seftali h3, .card-seftali .meta { color: var(--peach-ink); }
a.card-seftali:hover { background: color-mix(in srgb, var(--peach) 88%, var(--peach-ink)); }
/* Yüzen parça: başlık çevresinde duran küçük arayüz kesitleri; gölge
   taşıyan tek öğe */
.yuzen { padding: var(--s-16) var(--s-20); border-radius: var(--radius-float); background: var(--surface-elevated); box-shadow: var(--shadow-float); }
.card h3 { font-size: var(--text-title); font-weight: var(--weight-semibold); line-height: var(--leading-snug); margin: 0; }
.card > .overline { margin: 0; }
.card p { font-size: var(--text-small); line-height: 1.55; color: var(--text-secondary); }

.article-card { display: flex; flex-direction: column; gap: var(--s-12); min-height: 100%; }
.article-card .overline { margin: 0; }
.article-card h3 { font-size: clamp(1.125rem, 1.4vw, 1.3125rem); letter-spacing: var(--tracking-heading); margin: 0; }
.article-card .meta { margin-top: auto; padding-top: var(--s-16); font-size: var(--text-caption); color: var(--text-muted); }

.concept-card { display: grid; gap: var(--s-8); }
.concept-card h3 { margin: 0; }
.card .ok { margin-top: var(--s-8); font-size: var(--text-small); font-weight: var(--weight-medium); color: var(--accent); }

.data-card { display: grid; gap: var(--s-4); }
.data-card .etiket { font-size: var(--text-small); color: var(--text-secondary); }
.data-card .deger { font-size: clamp(1.75rem, 3vw, 2.25rem); font-weight: var(--weight-semibold); letter-spacing: var(--tracking-display); font-variant-numeric: tabular-nums; }

/* Gösterge kartı: bir ekonomik göstergenin ne ölçtüğü, kaynağı ve anlamı.
   Rakam yayınlamaz; güncel değer resmî kaynağa bağlanır. */
.gosterge { display: flex; flex-direction: column; gap: var(--s-16); }
.gosterge-bas { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s-16); }
.gosterge-bas .overline { margin-bottom: var(--s-4); }
.gosterge-bas h3 { margin: 0; font-size: var(--text-subheading); letter-spacing: var(--tracking-heading); }
.gosterge-ne { font-size: var(--text-body) !important; line-height: 1.5 !important; color: var(--text-primary) !important; }
.gosterge-ne span { color: var(--text-secondary); }
.gosterge .source { margin-top: auto; }

/* ---------- 8. Sayı ---------- */
.stat { display: grid; gap: var(--s-4); }
.stat-deger { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: var(--weight-semibold); line-height: 1; letter-spacing: var(--tracking-display); font-variant-numeric: tabular-nums; }
.stat-etiket { font-size: var(--text-small); color: var(--text-secondary); }
.metric { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-16); padding: var(--s-12) 0; border-bottom: 1px solid var(--border); }
.metric-ad { color: var(--text-secondary); font-size: var(--text-small); }
.metric-deger { font-weight: var(--weight-semibold); font-variant-numeric: tabular-nums; }
.degisim-artis { color: var(--positive); }
.degisim-azalis { color: var(--negative); }

/* ---------- 9. Bölüm başlığı ve hero ---------- */
.section-header { display: grid; gap: var(--s-16); max-width: 760px; margin-bottom: var(--s-48); }
.section-header.orta { margin-inline: auto; text-align: center; justify-items: center; }
.section-header h2 { font-family: var(--font-serif); font-size: var(--text-heading); font-weight: var(--weight-regular); line-height: var(--leading-tight); letter-spacing: var(--tracking-heading); }
.section-header p { font-size: var(--text-lead); line-height: 1.5; color: var(--text-secondary); }
.section-header .overline { margin: 0; }
.section-header-satir { display: flex; align-items: end; justify-content: space-between; gap: var(--s-24); max-width: none; }

.sayfa-hero { padding-top: clamp(64px, 11vw, 144px); padding-bottom: clamp(48px, 7vw, 96px); }
.sayfa-hero h1 { max-width: 18ch; font-family: var(--font-serif); font-size: var(--text-article); font-weight: var(--weight-regular); line-height: var(--leading-tight); letter-spacing: var(--tracking-heading); }
.sayfa-hero .govde-giris { max-width: 40ch; margin-top: var(--s-24); }
.hero-eylemler { display: flex; flex-wrap: wrap; gap: var(--s-12); margin-top: var(--s-32); }

/* ---------- 10. Gezinti ---------- */
.breadcrumbs { display: flex; flex-wrap: wrap; gap: var(--s-8); margin-bottom: var(--s-24); font-size: var(--text-small); color: var(--text-muted); }
.breadcrumbs ol { display: contents; list-style: none; }
.breadcrumbs li { display: inline-flex; align-items: center; gap: var(--s-8); }
.breadcrumbs li + li::before { content: "›"; color: var(--text-muted); }
.breadcrumbs a { color: var(--text-secondary); text-decoration: none; }
.breadcrumbs a:hover { color: var(--text-primary); }

.tabs [role="tablist"] {
  display: inline-flex;
  gap: var(--s-4);
  padding: var(--s-4);
  border-radius: var(--radius-full);
  background: var(--surface-secondary);
}
.tabs [role="tab"] {
  min-height: 36px;
  padding: 0 var(--s-16);
  border: 0;
  border-radius: var(--radius-full);
  background: none;
  color: var(--text-secondary);
  font: var(--weight-medium) var(--text-small)/1 var(--font-sans);
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease), color var(--motion-fast) var(--ease);
}
.tabs [role="tab"][aria-selected="true"] { background: var(--surface); color: var(--text-primary); box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08); }
.tabs [role="tabpanel"] { padding-top: var(--s-24); }

/* ---------- 11. Açılır ---------- */
.ipucu { position: relative; display: inline-flex; }
.ipucu-balon,
.popover {
  position: absolute;
  z-index: var(--z-popover);
  padding: var(--s-12) var(--s-16);
  max-width: min(320px, calc(100vw - 2 * var(--s-16)));
  border-radius: var(--radius-m);
  background: var(--surface-elevated);
  box-shadow: 0 0 0 1px var(--border), var(--shadow-raised);
  font-size: var(--text-small);
  line-height: 1.5;
  color: var(--text-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity var(--motion-fast) var(--ease), transform var(--motion-fast) var(--ease), visibility 0s linear var(--motion-fast);
}
.ipucu-balon { bottom: calc(100% + 8px); left: 50%; width: max-content; max-width: 260px; translate: -50% 0; }
.ipucu:hover .ipucu-balon,
.ipucu:focus-within .ipucu-balon,
.popover[data-acik] { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; }
.popover { top: calc(100% + 8px); left: 0; min-width: 240px; }
.ipucu-balon b { display: block; font-weight: var(--weight-semibold); }
.ipucu-balon small { display: block; color: var(--text-secondary); font-size: var(--text-caption); }

.accordion { border-top: 1px solid var(--border); }
.accordion details { border-bottom: 1px solid var(--border); }
.accordion summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-16);
  min-height: 56px;
  padding: var(--s-16) 0;
  font-weight: var(--weight-medium);
  cursor: pointer;
  list-style: none;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--text-secondary);
  border-bottom: 1.5px solid var(--text-secondary);
  transform: translateY(-2px) rotate(45deg);
  transition: transform var(--motion-normal) var(--ease);
}
.accordion details[open] summary::after { transform: translateY(2px) rotate(-135deg); }
.accordion .icerik { padding-bottom: var(--s-24); color: var(--text-secondary); }

/* ---------- 12. İlerleme ---------- */
.progress { height: 4px; border-radius: 2px; background: var(--surface-secondary); overflow: hidden; }
.progress > span { display: block; height: 100%; width: var(--deger, 0%); border-radius: inherit; background: var(--text-primary); transition: width var(--motion-slow) var(--ease); }
.progress-ring { --boyut: 64px; position: relative; width: var(--boyut); height: var(--boyut); }
.progress-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.progress-ring circle { fill: none; stroke-width: 3; }
.progress-ring .iz { stroke: var(--surface-secondary); }
.progress-ring .dolu { stroke: var(--text-primary); stroke-linecap: round; transition: stroke-dashoffset var(--motion-story) var(--ease); }
.progress-ring b { position: absolute; inset: 0; display: grid; place-items: center; font-size: var(--text-small); font-variant-numeric: tabular-nums; }

/* ---------- 13. Form ---------- */
.toggle { position: relative; display: inline-flex; align-items: center; gap: var(--s-12); min-height: var(--touch); cursor: pointer; }
.toggle input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.toggle-ray { position: relative; width: 44px; height: 26px; border-radius: 13px; background: var(--border-strong); transition: background var(--motion-fast) var(--ease); }
.toggle-ray::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: var(--surface); box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); transition: transform var(--motion-normal) var(--ease); }
.toggle input:checked + .toggle-ray { background: var(--accent); }
.toggle input:checked + .toggle-ray::after { transform: translateX(18px); }
.toggle input:focus-visible + .toggle-ray { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- 14. Öğrenme blokları ---------- */
.key-takeaway {
  padding: var(--s-24) var(--s-24) var(--s-24) var(--s-32);
  border-left: 2px solid var(--text-primary);
  background: var(--surface);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}
.key-takeaway .overline { margin-bottom: var(--s-8); }
.key-takeaway p { font-size: var(--text-subheading); font-weight: var(--weight-medium); line-height: 1.4; letter-spacing: var(--tracking-heading); color: var(--text-primary); }

.concept-definition { display: grid; gap: var(--s-8); padding: var(--s-24) 0; border-block: 1px solid var(--border); }
.concept-definition dt { font-size: var(--text-overline); font-weight: var(--weight-medium); letter-spacing: 0; color: var(--text-secondary); }
.concept-definition dd { font-size: var(--text-subheading); line-height: 1.4; letter-spacing: var(--tracking-heading); }

.simple-explanation { padding: var(--s-32) var(--s-24); border-radius: var(--radius-l); background: var(--peach); color: var(--peach-ink); }
.simple-explanation .overline, .simple-explanation p { color: var(--peach-ink) !important; }

.deep-dive { border-top: 1px solid var(--border); }
.deep-dive > summary { display: flex; align-items: center; gap: var(--s-12); min-height: 56px; font-weight: var(--weight-medium); cursor: pointer; list-style: none; }
.deep-dive > summary::-webkit-details-marker { display: none; }
.deep-dive > summary::before { content: "+"; display: grid; place-items: center; width: 24px; height: 24px; border: 1px solid var(--border-strong); border-radius: 50%; font-weight: 400; color: var(--text-secondary); transition: transform var(--motion-normal) var(--ease); }
.deep-dive[open] > summary::before { transform: rotate(45deg); }
.deep-dive > div { padding-bottom: var(--s-24); color: var(--text-secondary); }

.ilgili { display: grid; gap: var(--s-12); }
.ilgili h2 { font-size: var(--text-small); font-weight: var(--weight-semibold); letter-spacing: 0; color: var(--text-secondary); }
.ilgili-liste { display: flex; flex-wrap: wrap; gap: var(--s-8); }

.source > div { display: inline; }
.source { display: flex; flex-wrap: wrap; gap: var(--s-4) var(--s-24); padding-top: var(--s-12); border-top: 1px solid var(--border); font-size: var(--text-caption); color: var(--text-muted); }
.source dt { display: inline; }
.source dd { display: inline; margin: 0 0 0 var(--s-4); color: var(--text-secondary); }
.source a { color: var(--text-secondary); }

/* Makale: künye (okuma süresi, güncelleme, seviye) ve kapanış */
.makale-meta { display: flex; flex-wrap: wrap; gap: var(--s-8) var(--s-32); margin: var(--s-24) 0; padding: var(--s-16) 0; border-block: 1px solid var(--border); }
.makale-meta div { display: grid; gap: 2px; }
.makale-meta dt { font-size: var(--text-overline); font-weight: var(--weight-medium); letter-spacing: 0; color: var(--text-muted); }
.makale-meta dd { margin: 0; font-size: var(--text-small); font-weight: var(--weight-medium); color: var(--text-primary); font-variant-numeric: tabular-nums; }
.makale-son { padding: var(--s-64) 0 var(--s-96); border-top: 1px solid var(--border); }
.makale-son > div { display: grid; gap: var(--s-48); }
.makale-son h2 { font-size: var(--text-small); font-weight: var(--weight-semibold); letter-spacing: 0; color: var(--text-secondary); margin-bottom: var(--s-12); }
.makale-uyari { font-size: var(--text-caption); color: var(--text-muted); }
.bolum-akil { margin-top: var(--s-48); }
.kaynakca { display: grid; list-style: none; }
.kaynakca li { display: flex; flex-wrap: wrap; gap: var(--s-4) var(--s-12); align-items: baseline; padding: var(--s-12) 0; border-bottom: 1px solid var(--border); font-size: var(--text-small); }
.kaynakca a { color: var(--text-primary); font-weight: var(--weight-medium); }
.kaynakca span { color: var(--text-secondary); }

/* ---------- 15. "Bu ne anlama geliyor?" ---------- */
.anlam { border-top: 1px solid var(--border); }
.anlam > summary {
  display: flex;
  align-items: center;
  gap: var(--s-8);
  min-height: var(--touch);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--accent);
  cursor: pointer;
  list-style: none;
}
.anlam > summary::-webkit-details-marker { display: none; }
.anlam > summary::after { content: ""; width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg) translateY(-2px); transition: transform var(--motion-normal) var(--ease); }
.anlam[open] > summary::after { transform: rotate(-135deg) translateY(-2px); }
.anlam ul { display: grid; gap: var(--s-8); padding: 0 0 var(--s-8); list-style: none; }
.anlam li { position: relative; padding-left: var(--s-16); font-size: var(--text-small); line-height: 1.5; color: var(--text-secondary); }
.anlam li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 5px; height: 5px; border-radius: 50%; background: var(--text-muted); }

/* ---------- 16. Durumlar ---------- */
.empty-state, .error-state { display: grid; justify-items: center; gap: var(--s-12); padding: var(--s-64) var(--s-24); text-align: center; }
.empty-state h3, .error-state h3 { font-size: var(--text-title); font-weight: var(--weight-semibold); }
.empty-state p, .error-state p { max-width: 40ch; font-size: var(--text-small); color: var(--text-secondary); }
.empty-state svg, .error-state svg { width: 32px; height: 32px; color: var(--text-muted); }
.skeleton { border-radius: var(--radius-s); background: var(--surface-secondary); animation: skeleton-nefes 1.8s var(--ease-in-out) infinite alternate; }
@keyframes skeleton-nefes { to { opacity: 0.55; } }

/* ---------- 17. Simgeler: tek aile, 1.5px çizgi, yuvarlak uç ---------- */
.nav-bar svg:not(.logo-mark),
.tabbar svg,
.icon-btn svg,
.empty-state svg,
.error-state svg,
.ikon {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- 18. Okuma listesi ve ilerleme ---------- */
.sayfa-eylem { display: flex; flex-wrap: wrap; gap: var(--s-8); margin-top: var(--s-16); }
.kaydet-btn .ikon { width: 18px; height: 18px; }
.kaydet-btn[aria-pressed="true"] { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.kaydet-btn[aria-pressed="true"] .ikon { fill: currentColor; }

.karne-temel { display: grid; gap: var(--s-8); margin-top: var(--s-32); padding: var(--s-24); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-m); }
.karne-temel-bas { display: flex; justify-content: space-between; align-items: baseline; gap: var(--s-16); }
.karne-temel-bas span { font-size: var(--text-small); color: var(--text-secondary); font-variant-numeric: tabular-nums; }
.karne-temel .progress > span { background: var(--accent); }
.karne-temel p { color: var(--text-secondary); }
.karne-temel a { color: var(--accent); }
.karne-bolum { margin-top: var(--s-64); }
.karne-bolum[hidden], .son-bakilan:empty { display: none; }

.okuma-listesi { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--s-16); }
.okuma-listesi > .empty-state { grid-column: 1 / -1; }
.okuma-oge { display: flex; align-items: flex-start; gap: var(--s-8); padding: var(--s-16) var(--s-8) var(--s-16) var(--s-24); }
.okuma-oge > a { flex: 1; min-width: 0; display: grid; gap: var(--s-4); color: inherit; text-decoration: none; }
.okuma-oge > a:hover strong { color: var(--accent); }
.okuma-oge strong { font-weight: var(--weight-semibold); }
.okuma-oge .govde-kucuk { color: var(--text-secondary); }
.okuma-oge .icon-btn { flex: none; }

.son-bakilan { display: grid; border-top: 1px solid var(--border); }
.son-oge { display: flex; align-items: baseline; gap: var(--s-16); min-height: var(--touch); padding: var(--s-12) 0; border-bottom: 1px solid var(--border); color: var(--text-primary); text-decoration: none; }
.son-oge .overline { flex: none; width: 96px; }
.son-oge:hover { color: var(--accent); }

/* ---------- 19. İçeriğe geç: yalnızca klavyeyle odaklanınca görünür ---------- */
.atla { position: fixed; top: var(--s-8); left: var(--s-8); z-index: 1000; display: inline-flex; align-items: center; min-height: var(--touch); padding: 0 var(--s-16); border-radius: var(--radius-s); background: var(--text-primary); color: var(--background); font-weight: var(--weight-semibold); text-decoration: none; transform: translateY(-200%); }
.atla:focus { transform: none; }
main:focus { outline: none; }

/* ---------- 20. Işık huzmesi: başlık arkasında yumuşak renk ----------
   Bölüme .isikli eklenir; renk yalnızca bu bulanık katmanda yaşar.
   .isikli-yesil ve .isikli-mor başka bölümler için ton değiştirir. */
.isikli, .ana-hero, .page-hero, .sayfa-hero { position: relative; isolation: isolate; overflow-x: clip; }
.isikli::before, .ana-hero::before, .page-hero::before, .sayfa-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -8% -10% auto;
  height: min(880px, 110%);
  pointer-events: none;
  background:
    radial-gradient(38% 42% at 50% 58%, var(--glow-warm), transparent 72%),
    radial-gradient(30% 34% at 34% 42%, var(--glow-sun), transparent 70%),
    radial-gradient(30% 34% at 68% 46%, var(--glow-rose), transparent 70%);
  filter: blur(48px);
  animation: isik-nefes 16s var(--ease-in-out) infinite alternate;
}
.isikli-yesil::before {
  background:
    radial-gradient(34% 40% at 62% 62%, var(--glow-sage), transparent 72%),
    radial-gradient(26% 30% at 46% 56%, var(--glow-sun), transparent 70%);
}
.isikli-mor::before {
  inset: auto -10% -10%;
  background: radial-gradient(44% 50% at 60% 72%, var(--glow-violet), transparent 72%);
}
@keyframes isik-nefes { to { transform: translate3d(2%, -2%, 0) scale(1.06); opacity: 0.8; } }


/* ---------- 21. Kelime kelime başlık ----------
   script.js başlığı kelimelere böler (.kelimeli). Her kelime soluk griden,
   hafif bulanık ve biraz aşağıdan sırayla yerine oturur. Metin hep
   okunabilir durur: hiçbir kelime tamamen gizlenmez. */
.kelimeli { opacity: 1 !important; transform: none !important; }
@media (scripting: enabled) {
  .kelimeli .kelime {
    display: inline-block;
    opacity: 0.14;
    filter: blur(5px);
    transform: translateY(var(--y, 0.24em));
    transition:
      opacity var(--motion-story) var(--ease),
      filter var(--motion-story) var(--ease),
      transform var(--motion-story) var(--ease);
    transition-delay: calc(var(--delay, 0s) + var(--i, 0) * 60ms);
  }
  .kelimeli.visible .kelime { opacity: 1; filter: none; transform: none; }
}

/* ---------- 22. Yüzen parça: derinlik ----------
   data-yuzen="0.12": kaydırdıkça sayfadan farklı hızda kayar (script.js).
   .salinim: yerinde çok yavaş, belli belirsiz bir salınım. */
[data-yuzen] { translate: 0 var(--kay, 0); will-change: translate; }
.salinim { animation: salinim 9s var(--ease-in-out) infinite alternate; animation-delay: var(--gecikme, 0s); }
@keyframes salinim { from { transform: translateY(-5px); } to { transform: translateY(5px); } }

/* ---------- 23. Sekmeli liste ----------
   Solda başlıklar; seçili olanın altında ince bir çizgi dolar, dolunca
   sıradakine geçilir. Sağda pano yumuşakça değişir. */
.sekmeli { display: grid; grid-template-columns: minmax(220px, 300px) minmax(0, 1fr); gap: var(--s-48); align-items: start; }
.sekmeli-liste { display: grid; }
.sekmeli-liste [role="tab"] {
  position: relative;
  display: grid;
  gap: var(--s-8);
  min-height: var(--touch);
  padding: var(--s-16) 0;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: none;
  color: var(--text-muted);
  font: var(--weight-book) var(--text-body)/1.4 var(--font-sans);
  text-align: left;
  cursor: pointer;
  transition: color var(--motion-normal) var(--ease);
}
.sekmeli-liste [role="tab"] strong { font-weight: var(--weight-book); }
.sekmeli-liste [role="tab"] span { display: none; font-size: var(--text-small); line-height: 1.5; color: var(--text-secondary); }
.sekmeli-liste [role="tab"]:hover,
.sekmeli-liste [role="tab"][aria-selected="true"] { color: var(--text-primary); }
.sekmeli-liste [role="tab"][aria-selected="true"] span { display: block; animation: sekmeli-ac var(--motion-normal) var(--ease); }
.sekmeli-liste [role="tab"][aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 1px;
  background: var(--text-primary);
  transform-origin: left;
}
.sekmeli.akiyor [role="tab"][aria-selected="true"]::after { animation: sekmeli-dol var(--sure, 7s) linear both; }
.sekmeli.durdu [role="tab"][aria-selected="true"]::after { animation-play-state: paused; }
.sekmeli-panolar { display: grid; }
.sekmeli-panolar > [role="tabpanel"] {
  grid-area: 1 / 1;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--motion-slow) var(--ease), transform var(--motion-slow) var(--ease), visibility 0s linear var(--motion-slow);
}
.sekmeli-panolar > [role="tabpanel"][data-acik] { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; }
@keyframes sekmeli-dol { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes sekmeli-ac { from { opacity: 0; } }
@media (max-width: 899px) {
  .sekmeli { grid-template-columns: minmax(0, 1fr); gap: var(--s-24); }
}

/* ---------- 24. Kayan şerit ----------
   İçerik bir kez kopyalanır ve sonsuz akar; kenarlarda silinir, üzerine
   gelince durur. */
.serit { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.serit-ic { display: flex; gap: var(--s-48); width: max-content; animation: serit-ak var(--sure, 45s) linear infinite; }
.serit:hover .serit-ic, .serit:focus-within .serit-ic { animation-play-state: paused; }
.serit-ic > * { flex: none; }
@keyframes serit-ak { to { transform: translateX(calc(-50% - var(--s-48) / 2)); } }

/* Tablette menü kalabalıklaşmasın: "Öğrenmeye başla" yalnızca geniş ekranda */
@media (max-width: 1099px) {
  .nav-actions .nav-cta { display: none; }
}

/* Azaltılmış hareket: en sonda, yukarıdaki tüm hareketleri durdurur */
@media (prefers-reduced-motion: reduce) {
  .skeleton { animation: none; }
  .isikli::before, .ana-hero::before, .page-hero::before, .sayfa-hero::before { animation: none; }
  .kelimeli .kelime { opacity: 1 !important; filter: none !important; transform: none !important; transition: none !important; }
  [data-yuzen] { translate: none; }
  .salinim { animation: none; }
  .sekmeli-liste [role="tab"][aria-selected="true"]::after { animation: none; }
  .serit-ic { animation: none; flex-wrap: wrap; width: auto; }
  a.card:hover { transform: none; }
}