/* ============================================================
   ÇERÇEVE / DÜZEN
   ============================================================ */
.frame {
  min-height: 100vh;
  display: flex;
}

.icon {
  width: 1.1em;
  height: 1.1em;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* --- Sol dizin (masaüstü kalıcı gezinme) --- */
.site-index {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--index-width);
  border-right: 1px solid var(--color-line);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-6) var(--space-5);
  background: var(--color-bg);
  z-index: 40;
  overflow-y: auto;
}

.site-index__brand {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--color-ink-soft);
  text-transform: uppercase;
}
.site-index__brand strong {
  display: block;
  color: var(--color-ink);
  font-size: 0.8125rem;
}

.site-index__nav ol { display: flex; flex-direction: column; gap: var(--space-1); }

.site-index__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--color-ink-soft);
  border-bottom: 1px solid transparent;
}
.site-index__link .num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--color-ink-faint);
}
.site-index__link:hover { color: var(--color-ink); }
.site-index__link[aria-current="page"] {
  color: var(--color-ink);
}
.site-index__link[aria-current="page"] .num { color: var(--color-signal); }
.site-index__link[aria-current="page"] {
  border-bottom-color: var(--color-signal);
}

.site-index__foot {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--color-line-strong);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  width: fit-content;
}
.theme-switch button {
  padding: var(--space-2) var(--space-3);
  color: var(--color-ink-soft);
}
.theme-switch button[aria-pressed="true"] {
  background: var(--color-ink);
  color: var(--color-bg);
}
:root[data-theme="dark"] .theme-switch button[aria-pressed="true"] {
  background: var(--color-signal);
  color: var(--color-signal-on);
}

.site-index__meta {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--color-ink-faint);
  line-height: 1.7;
}

/* --- Mobil üst bar + menü tetikleyici --- */
.mobile-bar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 50;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}
.mobile-bar__brand {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.menu-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--color-line-strong);
  padding: var(--space-2) var(--space-3);
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--color-bg);
  padding: var(--space-6) var(--space-5);
  flex-direction: column;
  justify-content: space-between;
}
.nav-overlay.is-open { display: flex; }
.nav-overlay__top { display: flex; justify-content: space-between; align-items: center; }
.nav-overlay__list { display: flex; flex-direction: column; gap: var(--space-4); margin-top: var(--space-8); }
.nav-overlay__list a {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  display: flex;
  gap: var(--space-4);
  align-items: baseline;
}
.nav-overlay__list .num { font-family: var(--font-mono); font-size: var(--fs-small); color: var(--color-signal); }

/* --- İçerik gövdesi --- */
.frame__body {
  flex: 1;
  margin-left: var(--index-width);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.status-bar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-line);
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(6px);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}
.status-bar__item { display: flex; align-items: center; gap: var(--space-2); white-space: nowrap; }

main { flex: 1; }

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-7) var(--space-6);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--color-ink-soft);
}
.site-footer strong { color: var(--color-ink); display: block; margin-bottom: var(--space-2); font-size: var(--fs-micro); letter-spacing: 0.1em; text-transform: uppercase; }
.site-footer__social { display: flex; flex-direction: column; gap: var(--space-2); align-items: flex-start; }
.site-footer__social a { border: 1px solid var(--color-line-strong); padding: var(--space-1) var(--space-2); }
.site-footer__social a:hover { border-color: var(--color-signal); color: var(--color-signal); }
.site-footer__stamp { text-align: right; }

/* ============================================================
   ORTAK BLOKLAR
   ============================================================ */
.section {
  padding: var(--space-8) var(--space-6);
  border-bottom: 1px solid var(--color-line);
}
.section__inner { max-width: var(--content-max); margin: 0 auto; }
.section--wide .section__inner { max-width: 74rem; }

.panel__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-line);
}
.panel__index { font-family: var(--font-mono); font-size: var(--fs-small); color: var(--color-signal); }
.panel__title { font-family: var(--font-display); font-size: var(--fs-h2); font-weight: 500; }
.panel__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: 1.5px solid var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.btn:hover { background: var(--color-ink); color: var(--color-bg); }
.btn--signal { border-color: var(--color-signal); color: var(--color-signal); }
.btn--signal:hover { background: var(--color-signal); color: var(--color-signal-on); }
.btn .icon { width: 1em; height: 1em; }

.tag-list { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.tag {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--color-line-strong);
  color: var(--color-ink-soft);
}

/* ============================================================
   ANASAYFA / HAKKIMDA
   ============================================================ */
.hero {
  padding: var(--space-9) var(--space-6) var(--space-8);
  border-bottom: 1px solid var(--color-line);
  position: relative;
}
.hero__inner { max-width: 74rem; margin: 0 auto; }
.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  line-height: 1.05;
  margin: var(--space-4) 0 var(--space-6);
  max-width: 18ch;
}
.hero__lede {
  font-size: 1.1rem;
  color: var(--color-ink-soft);
  max-width: 42ch;
  margin-bottom: var(--space-6);
}
.hero__actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  margin-top: var(--space-8);
}
.spec-grid__cell { background: var(--color-bg); padding: var(--space-4) var(--space-5); }
.spec-grid__cell .label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: var(--space-2);
}
.spec-grid__cell .value { font-family: var(--font-display); font-size: 1.2rem; }

.prose { max-width: 66ch; }
.prose p { margin-bottom: var(--space-4); color: var(--color-ink-soft); }
.prose p:last-child { margin-bottom: 0; }

/* ============================================================
   HİZMETLER
   ============================================================ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}
.service-tile {
  background: var(--color-bg);
  padding: var(--space-6) var(--space-5);
  position: relative;
  overflow: hidden;
}
.service-tile::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  height: 2px;
  width: 0;
  background: var(--color-signal);
  transition: width 0.3s ease;
}
.service-tile:hover::after { width: 100%; }
.service-tile__head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: var(--space-5); }
.service-tile__icon {
  width: 2.5rem; height: 2.5rem;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-line-strong);
  color: var(--color-signal);
}
.service-tile__icon .icon { width: 1.3rem; height: 1.3rem; }
.service-tile__index { font-family: var(--font-mono); font-size: var(--fs-micro); color: var(--color-ink-faint); }
.service-tile h3 { font-family: var(--font-display); font-size: 1.25rem; margin-bottom: var(--space-3); }
.service-tile p { color: var(--color-ink-soft); font-size: var(--fs-small); }

/* ============================================================
   PROJELER
   ============================================================ */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr));
  gap: var(--space-6);
}
.project-card { display: flex; flex-direction: column; }
.project-card__cover {
  aspect-ratio: 16 / 10;
  border: 1px solid var(--color-line);
  overflow: hidden;
  margin-bottom: var(--space-4);
}
.project-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.placeholder-plate {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 1.25rem 1.25rem;
  position: relative;
}
.placeholder-plate span {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  color: var(--color-line-strong);
}
.project-card__meta { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: var(--fs-micro); color: var(--color-ink-faint); text-transform: uppercase; margin-bottom: var(--space-2); }
.project-card h3 { font-family: var(--font-display); font-size: 1.3rem; margin-bottom: var(--space-2); }
.project-card p { color: var(--color-ink-soft); font-size: var(--fs-small); margin-bottom: var(--space-3); }
.project-card .tag-list { margin-top: auto; }
.project-card a.stretched::after { content: ""; position: absolute; inset: 0; }
.project-card { position: relative; }

.project-detail__head { margin-bottom: var(--space-7); }
.project-detail__cover { border: 1px solid var(--color-line); aspect-ratio: 16/8; margin-bottom: var(--space-7); overflow: hidden; }
.project-detail__cover img { width: 100%; height: 100%; object-fit: cover; }
.spec-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: var(--space-5); margin-bottom: var(--space-7); padding: var(--space-5) 0; border-top: 1px solid var(--color-line); border-bottom: 1px solid var(--color-line); }
.spec-list dt { font-family: var(--font-mono); font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-ink-faint); margin-bottom: var(--space-1); }
.spec-list dd { font-family: var(--font-display); font-size: 1.05rem; }

.back-link { display: inline-flex; align-items: center; gap: var(--space-2); font-family: var(--font-mono); font-size: var(--fs-small); color: var(--color-ink-soft); margin-bottom: var(--space-6); }
.back-link:hover { color: var(--color-signal); }
.back-link .icon { transform: rotate(180deg); width: 1em; height: 1em; }

/* ============================================================
   İLETİŞİM
   ============================================================ */
.contact-layout { display: grid; grid-template-columns: 1.1fr 1.4fr; gap: var(--space-8); align-items: start; }
.contact-info dl { margin-top: var(--space-6); display: flex; flex-direction: column; gap: var(--space-4); }
.contact-info dt { font-family: var(--font-mono); font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-ink-faint); }
.contact-info dd { font-family: var(--font-display); font-size: 1.1rem; }

.form-field { margin-bottom: var(--space-5); }
.form-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-2);
}
.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--color-line-strong);
  padding: var(--space-3) 0;
  color: var(--color-ink);
  font-size: 1rem;
}
.form-field textarea { resize: vertical; min-height: 8rem; }
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-bottom-color: var(--color-signal);
  box-shadow: 0 1px 0 0 var(--color-signal);
}
.form-field--honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }

.alert {
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-line-strong);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  margin-bottom: var(--space-6);
}
.alert--success { border-color: var(--color-signal); color: var(--color-signal); }
.alert--error { border-color: var(--color-signal); color: var(--color-signal); }

/* ============================================================
   DUYARLI KIRILMALAR
   ============================================================ */
@media (max-width: 960px) {
  .site-index { display: none; }
  .mobile-bar { display: flex; }
  .frame__body { margin-left: 0; }
  .site-footer { grid-template-columns: 1fr; text-align: left; }
  .site-footer__stamp { text-align: left; }
  .contact-layout { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .section { padding: var(--space-7) var(--space-4); }
  .hero { padding: var(--space-8) var(--space-4) var(--space-7); }
  .status-bar { padding: var(--space-3) var(--space-4); flex-wrap: wrap; }
}