/* =============================================================================
   Murat Mavi — portföy
   Tek tasarım sistemi: renkler, ölçek ve boşluklar aşağıdaki değişkenlerde.
   Tema değişimi sadece :root[data-theme] bloklarını değiştirir; başka hiçbir
   kural rengi sabit yazmaz.
   ========================================================================== */

/* ---- 1. Tokenlar --------------------------------------------------------- */
:root {
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "SF Mono", "JetBrains Mono", Consolas, "Liberation Mono", monospace;

  --maxw: 1140px;
  --pad: clamp(1.25rem, 5vw, 3.5rem);
  --gutter: 5.5rem;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;

  --step: cubic-bezier(.22, 1, .36, 1);
  --dur: .28s;
}

:root[data-theme="dark"] {
  --bg:        #0b0d10;
  --bg-soft:   #0f1216;
  --surface:   #12161b;
  --surface-2: #171c22;
  --border:    rgba(255, 255, 255, .09);
  --border-str:rgba(255, 255, 255, .17);
  --text:      #e8ecf1;
  --dim:       #98a2ad;
  --faint:     #7c8794;   /* WCAG AA: --bg-soft üzerinde 5.1:1 */
  --accent:    #2dd4a7;
  --accent-ink:#2dd4a7;
  --accent-bg: rgba(45, 212, 167, .12);
  --glow:      radial-gradient(60% 55% at 78% 0%, rgba(45, 212, 167, .13), transparent 70%);
  --shadow:    0 1px 2px rgba(0,0,0,.4), 0 12px 34px -14px rgba(0,0,0,.75);
}

:root[data-theme="light"] {
  --bg:        #fbfaf8;
  --bg-soft:   #f4f2ee;
  --surface:   #ffffff;
  --surface-2: #f7f5f2;
  --border:    rgba(12, 18, 24, .11);
  --border-str:rgba(12, 18, 24, .24);
  --text:      #14181d;
  --dim:       #565f69;
  --faint:     #626b75;   /* WCAG AA: --bg-soft üzerinde 4.7:1 */
  --accent:    #0f9d78;
  --accent-ink:#06674f;
  --accent-bg: rgba(15, 157, 120, .10);
  --glow:      radial-gradient(60% 55% at 78% 0%, rgba(15, 157, 120, .10), transparent 70%);
  --shadow:    0 1px 2px rgba(12,18,24,.05), 0 14px 30px -18px rgba(12,18,24,.28);
}

/* ---- 2. Temel ------------------------------------------------------------ */
* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  -webkit-text-size-adjust: 100%;
  /* clip, hidden'ın aksine position:sticky'yi bozmaz */
  overflow-x: clip;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: clamp(.95rem, .35vw + .88rem, 1.0625rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background var(--dur) var(--step), color var(--dur) var(--step);
}

h1, h2, h3 { margin: 0; font-weight: 660; letter-spacing: -.025em; line-height: 1.1; }
p  { margin: 0; }
ul, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }
img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.mono {
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .04em;
}

::selection { background: var(--accent); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* Ekran okuyucuya görünür, göze görünmez — negatif konum yerine clip-path
   kullanılıyor; böylece yatay kaydırma çubuğu oluşturmuyor. */
.skip {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  z-index: 100;
  padding: .6rem 1rem;
  background: var(--accent);
  color: #04120d;
  border-radius: var(--r-sm);
  font-weight: 600;
}
.skip:focus-visible {
  width: auto; height: auto;
  clip-path: none;
  inset: .75rem auto auto 1rem;
}

/* ---- 3. Üst bar ---------------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--step);
}
.topbar.is-stuck { border-bottom-color: var(--border); }

.topbar__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: .85rem var(--pad);
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.brand { display: flex; align-items: center; gap: .6rem; margin-inline-end: auto; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 2rem; height: 2rem;
  border: 1px solid var(--border-str);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .02em;
  color: var(--accent-ink);
  transition: border-color var(--dur) var(--step), background var(--dur) var(--step);
}
.brand:hover .brand__mark { background: var(--accent-bg); border-color: var(--accent); }
.brand__name { font-weight: 600; letter-spacing: -.01em; font-size: .95rem; }

.nav { display: flex; gap: .35rem; }
.nav a {
  padding: .45rem .7rem;
  border-radius: var(--r-sm);
  color: var(--dim);
  font-size: .875rem;
  transition: color var(--dur) var(--step), background var(--dur) var(--step);
}
.nav a:hover { color: var(--text); background: var(--surface-2); }

.switches { display: flex; gap: .4rem; }
.switch {
  display: grid;
  place-items: center;
  width: 2.15rem; height: 2.15rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--dim);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  transition: color var(--dur) var(--step), border-color var(--dur) var(--step), background var(--dur) var(--step);
}
.switch:hover { color: var(--text); border-color: var(--border-str); background: var(--surface-2); }

.ico { width: 1.05rem; height: 1.05rem; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; }
:root[data-theme="dark"]  .ico--sun  { display: block; }
:root[data-theme="dark"]  .ico--moon { display: none; }
:root[data-theme="light"] .ico--sun  { display: none; }
:root[data-theme="light"] .ico--moon { display: block; }

/* ---- 4. Hero ------------------------------------------------------------- */
.hero {
  position: relative;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(3.5rem, 11vh, 7rem) var(--pad) clamp(3rem, 8vh, 5rem);
}
.hero::before {
  content: "";
  position: absolute;
  inset: -30% 0 auto 0;   /* viewport dışına taşmaz */
  height: 130%;
  background: var(--glow);
  pointer-events: none;
  z-index: -1;
}

.hero__grid {
  display: grid;
  gap: clamp(2.5rem, 6vw, 4rem);
  align-items: end;
}

.hero__role { color: var(--accent-ink); text-transform: uppercase; margin-bottom: 1.1rem; }

/* Tek satır — ölçek, "Murat Sağdıç" iki kelimenin yan yana sığacağı şekilde ayarlı */
.hero__name {
  font-size: clamp(2.6rem, 8vw, 5.25rem);
  line-height: .95;
  letter-spacing: -.045em;
  font-weight: 680;
  margin-bottom: 1.6rem;
  text-wrap: balance;
}

.hero__lead {
  max-width: 46ch;
  color: var(--dim);
  font-size: clamp(1rem, .5vw + .9rem, 1.15rem);
}

.hero__cta { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 2rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.25rem;
  border: 1px solid var(--border-str);
  border-radius: 100px;
  font-size: .9rem;
  font-weight: 550;
  color: var(--text);
  transition: transform var(--dur) var(--step), background var(--dur) var(--step),
              border-color var(--dur) var(--step), color var(--dur) var(--step);
}
.btn:hover { transform: translateY(-2px); background: var(--surface-2); border-color: var(--border-str); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: #04120d; font-weight: 620; }
.btn--primary:hover { background: var(--accent); filter: brightness(1.08); color: #04120d; }

/* İstatistikler — hairline ile ayrılmış, mono rakamlı */
.stats { display: grid; gap: 0; border-top: 1px solid var(--border); }
.stats > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: .95rem 0;
  border-bottom: 1px solid var(--border);
}
.stats dt { color: var(--dim); font-size: .875rem; order: 2; text-align: end; }
.stats dd {
  order: 1;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -.03em;
  color: var(--text);
}
.stats dd em { font-style: normal; color: var(--accent-ink); }

/* ---- 5. Bölüm iskeleti --------------------------------------------------- */
.section {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(3rem, 8vh, 5.5rem) var(--pad);
  border-top: 1px solid var(--border);
}
.section--last { border-bottom: 1px solid var(--border); }

.section__head { display: flex; gap: 1rem; margin-bottom: 2rem; }
.section__idx { color: var(--faint); padding-top: .45rem; min-width: 2rem; }
.section__head h2 { font-size: clamp(1.6rem, 3.5vw, 2.35rem); }
.section__note { color: var(--dim); margin-top: .4rem; max-width: 52ch; font-size: .95rem; }

/* ---- 5b. Hakkımda -------------------------------------------------------- */
/* Sıfat rozetleri — filtre çiplerinin seçili hâliyle aynı dil, ama tıklanmaz */
.traits { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.6rem; }
.trait {
  padding: .35rem .85rem;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  border-radius: 100px;
  background: var(--accent-bg);
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .04em;
}

.about { max-width: 60ch; display: grid; gap: 1.1rem; }
.about p { color: var(--dim); line-height: 1.8; }

/* Açılış cümlesi büyük punto ve tam kontrast — bölümün girişi burası */
.about p:first-child {
  color: var(--text);
  font-size: clamp(1.1rem, .5vw + 1rem, 1.3rem);
  line-height: 1.6;
  letter-spacing: -.012em;
}

/* Kapanış cümlesi kartlardaki "Katkım" satırıyla aynı işareti taşır:
   accent çizgi = bu benim kendi sözüm. */
.about p:last-child {
  color: var(--text);
  padding-inline-start: 1rem;
  border-inline-start: 2px solid color-mix(in srgb, var(--accent) 55%, transparent);
}

/* ---- 6. Filtreler -------------------------------------------------------- */
.filters { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: 1.75rem; }
.chip {
  padding: .42rem .85rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: transparent;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .02em;
  cursor: pointer;
  transition: color var(--dur) var(--step), border-color var(--dur) var(--step), background var(--dur) var(--step);
}
.chip:hover { color: var(--text); border-color: var(--border-str); }
.chip[aria-pressed="true"] {
  color: var(--accent-ink);
  border-color: var(--accent);
  background: var(--accent-bg);
}
.chip__n { opacity: .55; margin-inline-start: .35rem; }

/* ---- 7. Uygulama kartları ------------------------------------------------ */
.cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 310px), 1fr));
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .85rem;
  padding: 1.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform var(--dur) var(--step), border-color var(--dur) var(--step),
              box-shadow var(--dur) var(--step), background var(--dur) var(--step);
}
.card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent 65%);
  opacity: 0;
  transition: opacity var(--dur) var(--step);
}
.card--featured::after { opacity: .85; }
.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-str);
  box-shadow: var(--shadow);
  background: var(--surface-2);
}
.card:hover::after { opacity: 1; }

.card__top { display: flex; align-items: flex-start; gap: .85rem; }

.card__icon {
  width: 3.25rem; height: 3.25rem;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: var(--surface-2);
  flex: none;
  transition: transform var(--dur) var(--step);
}
.card:hover .card__icon { transform: scale(1.05) rotate(-1.5deg); }

.card__title { display: flex; flex-direction: column; gap: .15rem; min-width: 0; }
.card__title h3 { font-size: 1.05rem; letter-spacing: -.015em; }
.card__sub { color: var(--faint); font-size: .8rem; }

.card__role {
  margin-inline-start: auto;
  flex: none;
  padding: .2rem .5rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  white-space: nowrap;
}
.card__role[data-role="security"] { color: var(--accent-ink); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }

.card__meta { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .25rem .55rem;
  border-radius: var(--r-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--dim);
}
.pill b { color: var(--text); font-weight: 600; }
.pill--rating b { color: var(--accent-ink); }

.card__desc { color: var(--dim); font-size: .9rem; line-height: 1.6; }

/* "Katkım" — kartın en değerli satırı, bu yüzden tam kontrastlı ve işaretli */
.card__mine {
  flex: 1;
  color: var(--text);
  font-size: .85rem;
  line-height: 1.55;
  padding-inline-start: .8rem;
  border-inline-start: 2px solid color-mix(in srgb, var(--accent) 55%, transparent);
}
.card__mine-k {
  display: block;
  margin-bottom: .2rem;
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--accent-ink);
}

.card__tech { display: flex; flex-wrap: wrap; gap: .3rem; }
.tag {
  padding: .18rem .5rem;
  border-radius: var(--r-sm);
  background: var(--bg-soft);
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: .68rem;
}

.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  padding-top: .85rem;
  border-top: 1px solid var(--border);
  color: var(--accent-ink);
  font-size: .82rem;
  font-weight: 550;
}
.card__foot .arrow { transition: transform var(--dur) var(--step); }
.card:hover .card__foot .arrow { transform: translateX(4px); }
.card__pkg { color: var(--faint); font-family: var(--font-mono); font-size: .66rem; font-weight: 400; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---- 8. Donanım ---------------------------------------------------------- */
.hw { display: grid; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--r-md); overflow: hidden; }

.hw__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.4rem;
  background: var(--surface);
  transition: background var(--dur) var(--step);
}
.hw__item:hover { background: var(--surface-2); }

.hw__glyph {
  display: grid;
  place-items: center;
  width: 2.6rem; height: 2.6rem;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  background: var(--accent-bg);
  color: var(--accent-ink);
  font-size: 1.1rem;
  flex: none;
}
.hw__item h3 { font-size: 1rem; margin-bottom: .35rem; }
.hw__desc { color: var(--dim); font-size: .9rem; line-height: 1.6; margin-bottom: .7rem; }
.hw__tech { display: flex; flex-wrap: wrap; gap: .3rem; }

/* ---- 9. Yetenekler ------------------------------------------------------- */
.skills { display: grid; gap: 0; }
.skills > div {
  display: grid;
  gap: .25rem 1.5rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.skills > div:first-child { border-top: 1px solid var(--border); }
.skills dt { font-family: var(--font-mono); font-size: .8rem; color: var(--accent-ink); letter-spacing: .03em; padding-top: .15rem; }
.skills dd { color: var(--dim); font-size: .93rem; }

/* ---- 10. İletişim -------------------------------------------------------- */
.contact__lead { max-width: 46ch; color: var(--dim); margin-bottom: 1.75rem; }
.contact__links { display: grid; border-top: 1px solid var(--border); }
.contact__links a {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.05rem .25rem;
  border-bottom: 1px solid var(--border);
  transition: padding var(--dur) var(--step), color var(--dur) var(--step), background var(--dur) var(--step);
}
.contact__links a:hover { padding-inline-start: 1rem; background: var(--surface); }
.contact__k { font-family: var(--font-mono); font-size: .75rem; color: var(--faint); text-transform: uppercase; letter-spacing: .06em; min-width: 5.5rem; flex: none; }
/* min-width:0 olmadan uzun URL flex satırını şişirir ve sayfayı yatay kaydırır */
.contact__v { font-size: clamp(1rem, 2.2vw, 1.25rem); font-weight: 550; letter-spacing: -.015em; min-width: 0; overflow-wrap: anywhere; }
.contact__links a:hover .contact__v { color: var(--accent-ink); }
.contact__links .arrow { margin-inline-start: auto; color: var(--faint); transition: transform var(--dur) var(--step), color var(--dur) var(--step); }
.contact__links a:hover .arrow { transform: translateX(4px); color: var(--accent-ink); }

/* ---- 11. Alt bilgi ------------------------------------------------------- */
.footer {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 2.25rem var(--pad) 3rem;
  color: var(--faint);
}

/* ---- 12. Görünüme girme animasyonu -------------------------------------- */
.reveal { opacity: 0; transform: translateY(14px); }
.reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity .55s var(--step), transform .55s var(--step);
}

/* ---- 13. Kırılım noktaları ---------------------------------------------- */
@media (min-width: 700px) {
  .hw { grid-template-columns: 1fr 1fr; }
  .skills > div { grid-template-columns: 11rem 1fr; }
  .stats { grid-template-columns: 1fr; }
}

@media (min-width: 900px) {
  .hero__grid { grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr); }
  .section__head { display: grid; grid-template-columns: var(--gutter) 1fr; gap: 0; }
  .section__idx { padding-top: .6rem; }
  .traits, .about, .filters, .cards, .hw, .skills, .contact { margin-inline-start: var(--gutter); }
}

@media (max-width: 780px) {
  .nav { display: none; }
}

/* ---- 14. Erişilebilirlik: hareket azaltma ------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---- 15. Baskı ----------------------------------------------------------- */
@media print {
  .topbar, .filters, .hero::before { display: none; }
  body { background: #fff; color: #000; }
  .card, .hw__item { break-inside: avoid; }
}