/* Playground ana sayfası. Loodos marka kılavuzu: Red Hat Display, resmi palet, düz kartlar.
   Proje sayfaları bu dosyayı kullanmaz; her proje kendi stilini taşır. */
:root {
  color-scheme: light;
  --bg: #F8F8F8;
  --surface: #FFFFFF;
  --ink: #131E20;
  --ink-2: #424B4D;
  --muted: #667085;
  --line: #E5E5E5;
  --mint: #1AB0BA;
  --mint-5: #D4F9F9;
  --blue: #5D5DF7;
  --blue-5: #DFE5FF;
  --tag-bg: var(--mint-5);
  --tag-ink: var(--ink);
  --tag-sandbox-bg: var(--blue-5);
  --tag-sandbox-ink: var(--ink);
  --on-ink: #FFFFFF;
  --footer-bg: #131E20;
  --footer-line: transparent;
  --il-paper: #FFFFFF;
  --font: "Red Hat Display", system-ui, sans-serif;
  --frame: 1180px;
}

/* Koyu tema: marka kılavuzunun koyu zemin karşılıkları (#131E20 zemin, #424B4D kart/çizgi, #D0D2D2 gövde).
   data-theme her zaman <head>teki betikle atanır: kayıtlı seçim varsa o, yoksa sistem ayarı. */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #131E20;
  --surface: rgba(66, 75, 77, 0.32);
  --ink: #F8F8F8;
  --ink-2: #D0D2D2;
  --muted: #A1A5A6;
  --line: #424B4D;
  --mint: #37D1D9;
  --tag-bg: rgba(26, 176, 186, 0.2);
  --tag-ink: #AEF2F3;
  --tag-sandbox-bg: rgba(93, 93, 247, 0.28);
  --tag-sandbox-ink: #C5D0FF;
  --on-ink: #131E20;
  --footer-bg: #0E1618;
  --footer-line: #424B4D;
  /* Koyu kart zemininin opak karşılığı (#424B4D %32 + #131E20): illüstrasyondaki "kesikler" zeminle aynı görünsün. */
  --il-paper: #222C2E;
}

/* Logo ve tema ikonu: açık temada koyu wordmark + ay, koyu temada beyaz wordmark + güneş. */
.brand .logo-dark,
.theme-toggle .sun,
:root[data-theme="dark"] .brand .logo-light,
:root[data-theme="dark"] .theme-toggle .moon {
  display: none;
}

:root[data-theme="dark"] .brand .logo-dark,
:root[data-theme="dark"] .theme-toggle .sun {
  display: block;
}

/* İlk ziyarette dil ülkeye göre seçilene kadar (en çok 1 sn) sayfa gizli; sınıfı <head>teki betik ekler, i18n.js kaldırır. */
.pg-lang-pending body {
  visibility: hidden;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 17px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p {
  margin: 0;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.wrap {
  max-width: var(--frame);
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 720px) {
  .wrap {
    padding: 0 40px;
  }
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mint);
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand img {
  display: block;
  height: 30px;
  width: auto;
}

.brand span {
  padding-left: 14px;
  border-left: 1px solid var(--line);
  font-weight: 500;
  color: var(--ink-2);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 2px;
}

.lang-switch button {
  padding: 4px 10px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: 600 0.75rem var(--font);
  letter-spacing: 0.06em;
  cursor: pointer;
}

.lang-switch button:hover {
  color: var(--ink);
}

.lang-switch button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--on-ink);
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--ink);
  border-color: var(--mint);
}

.theme-toggle svg {
  width: 15px;
  height: 15px;
}

@media (max-width: 480px) {
  .header-link {
    display: none;
  }
}

.header-link {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--ink-2);
  text-decoration: none;
}

.header-link:hover {
  color: var(--mint);
}

/* Hero */
.hero {
  padding-top: 72px;
  padding-bottom: 56px;
}

.hero h1 {
  margin-top: 16px;
  max-width: 15ch;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.hero .lead {
  margin-top: 24px;
  max-width: 56ch;
  font-size: 1.15rem;
  color: var(--ink-2);
}

.hero .rule {
  width: 72px;
  height: 5px;
  margin-top: 40px;
  background: var(--mint);
}

/* Proje grid'i */
.projects {
  padding-bottom: 80px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.section-head h2 {
  font-size: 1.5rem;
  font-weight: 500;
}

.section-head .count {
  color: var(--muted);
  font-size: 0.9rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 300px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color 0.15s ease;
}

/* Stretched link: başlıktaki bağlantı ::after ile kartın tamamını kaplar; odak çerçevesi de kartın çevresinde çizilir. */
.card-link {
  color: inherit;
  text-decoration: none;
}

.card-link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}

.card-link:focus-visible {
  outline: none;
}

.card-link:focus-visible::after {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

/* "Yapan" bölümü (kurallar: .claude/rules/defaults.md §8): kartın altında, meta satırının üstünde, küçük.
   Kişi bağlantıları stretched link'in üstünde (z-index 2). */
.card-bottom {
  margin-top: auto;
  padding-top: 24px;
}

.card-credit {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--muted);
}

.credit-label {
  flex: none;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

/* Birden fazla kişi alt alta. */
.card-credit ul {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card-credit a,
.card-credit .name {
  font-weight: 600;
  color: var(--ink-2);
}

.card-credit a {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
}

.card-credit a:hover {
  color: var(--mint);
}

.card-credit svg {
  width: 10px;
  height: 10px;
}

.card-credit .role {
  margin-left: 5px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.card::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto;
  height: 4px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.card:hover,
.card:has(.card-link:focus-visible) {
  border-color: var(--mint);
}

.card:hover::before,
.card:has(.card-link:focus-visible)::before {
  transform: scaleX(1);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-num {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.tag {
  padding: 3px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--tag-bg);
  color: var(--tag-ink);
}

.tag.sandbox {
  background: var(--tag-sandbox-bg);
  color: var(--tag-sandbox-ink);
}

.card h3 {
  margin-top: 40px;
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.15;
}

.card p {
  margin-top: 12px;
  color: var(--ink-2);
}

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.arrow {
  font-size: 1.3rem;
  color: var(--ink);
  transition: transform 0.2s ease, color 0.2s ease;
}

.card:hover .arrow,
.card:has(.card-link:focus-visible) .arrow {
  color: var(--mint);
  transform: translateX(4px);
}

/* Kart illüstrasyonu (kurallar: .claude/rules/defaults.md §7). Yalnız hover ve klavye odağında görünür:
   numara yukarı kayıp kaybolur, illüstrasyon aşağıdan yerine oturur, Mint vurgu en son gelir. */
.card-num {
  transition: opacity 0.15s ease, transform 0.25s ease;
}

.card-art {
  position: absolute;
  top: 18px;
  left: 20px;
  width: 120px;
  height: 80px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.35s cubic-bezier(0.2, 0.9, 0.3, 1.15);
  pointer-events: none;
}

.card-art svg {
  display: block;
  width: 100%;
  height: 100%;
}

.card-art .il-accent {
  opacity: 0;
  transform: translateY(4px) scale(0.4);
  transform-box: fill-box;
  transform-origin: center;
  transition: opacity 0.1s ease, transform 0.15s ease;
}

.card:has(.card-link:focus-visible) .card-num {
  opacity: 0;
  transform: translateY(-10px);
}

.card:has(.card-link:focus-visible) .card-art {
  opacity: 1;
  transform: none;
}

.card:has(.card-link:focus-visible) .card-art .il-accent {
  opacity: 1;
  transform: none;
  transition: opacity 0.2s ease 0.2s, transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s;
}

@media (hover: hover) {
  .card:hover .card-num {
    opacity: 0;
    transform: translateY(-10px);
  }

  .card:hover .card-art {
    opacity: 1;
    transform: none;
  }

  .card:hover .card-art .il-accent {
    opacity: 1;
    transform: none;
    transition: opacity 0.2s ease 0.2s, transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s;
  }
}

@media (prefers-reduced-motion: reduce) {
  .card-num,
  .card-art,
  .card-art .il-accent {
    transform: none !important;
    transition: opacity 0.15s ease !important;
  }
}

/* İllüstrasyon renkleri yalnız bu sınıflardan gelir; koyu temada token'larla kendiliğinden döner. */
.il-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.il-ink { fill: var(--ink); }
.il-paper { fill: var(--il-paper); }
.il-soft { fill: var(--line); }
.il-dots { fill: url(#il-dots); }
.il-dot { fill: var(--ink); }
.il-accent { fill: var(--mint); }

.il-line,
.il-cut {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.il-line { stroke: var(--ink); }
.il-cut { stroke: var(--il-paper); }

/* Haftalık ritim */
.rhythm {
  padding-top: 56px;
  padding-bottom: 80px;
  border-top: 1px solid var(--line);
}

.rhythm-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-top: 28px;
}

.rhythm-grid div {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.rhythm-grid .on {
  border-top: 5px solid var(--mint);
  padding-top: 12px;
}

.rhythm-grid h3 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.rhythm-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 1.4rem;
  font-weight: 500;
}

.rhythm-grid p {
  margin-top: 6px;
  color: var(--ink-2);
  font-size: 0.95rem;
}

/* Footer */
.site-footer {
  background: var(--footer-bg);
  border-top: 1px solid var(--footer-line);
  color: #D0D2D2;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-top: 56px;
  padding-bottom: 56px;
}

.site-footer .motto {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 500;
  line-height: 1.15;
  color: #FFFFFF;
}

.site-footer .motto span {
  color: #1AB0BA;
}

.site-footer .links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.9rem;
  text-align: right;
}

.site-footer a {
  text-decoration: none;
}

.site-footer a:hover {
  color: #37D1D9;
}

/* Katkı sayfası (/contribute/): dönüş butonu önizlemesi, kod ve prompt blokları. Kod blokları tek istisna olarak eş aralıklı font kullanır. */
.kit {
  padding-bottom: 80px;
}

.kit-step {
  padding-top: 48px;
}

.kit-step h2 {
  margin-top: 8px;
  font-size: 1.5rem;
  font-weight: 500;
}

.kit-step > p:not(.eyebrow) {
  margin-top: 10px;
  max-width: 64ch;
  color: var(--ink-2);
}

.kit-demo {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.kit-demo-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 56px;
  padding: 0 16px;
  background: #FFFFFF;
  color: #131E20;
  border: 1px solid var(--line);
  border-radius: 2px;
}

.kit-demo-bar.dark {
  background: #131E20;
  color: #F8F8F8;
  border-color: #424B4D;
}

.kit-demo-logo {
  width: 72px;
  height: 10px;
  border-radius: 2px;
  background: currentColor;
  opacity: 0.18;
}

.kit-code {
  margin-top: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.kit-code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 8px 8px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.kit-copy {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
  font: 600 0.78rem var(--font);
  letter-spacing: 0;
  cursor: pointer;
}

.kit-copy:hover,
.kit-copy.ok {
  border-color: var(--mint);
}

.kit-copy.ok {
  background: var(--tag-bg);
  color: var(--tag-ink);
}

.kit-code pre {
  max-height: 420px;
  margin: 0;
  padding: 16px;
  overflow: auto;
  font: 0.8rem/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--ink-2);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

html[lang="tr"] .only-en,
html:not([lang="tr"]) .only-tr {
  display: none;
}

/* Sosyal hesaplar (loodos.com footer'ıyla aynı ikonlar). Tıklama alanı 32px; ikon kenarı metnin sağ kenarına hizalı. */
.social {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin: 14px -6px 0 0;
  padding: 0;
  list-style: none;
}

.social a {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
}

.social svg {
  display: block;
  width: 20px;
  height: 20px;
}