/* ==========================================================================
   Mekânsal Yapı — style.css
   Renk / boşluk / tipografi değişkenleri :root içinde. Kurumsal kimlik
   değişirse önce buraya bakın.
   ========================================================================== */

:root {
  /* Renkler */
  --bg:            #ffffff;
  --bg-alt:        #f7f7f5;
  --bg-dark:       #16161a;
  --text:          #1c1c1a;
  --text-muted:    #6b6b66;
  --text-invert:   #ffffff;
  --accent:        #d97706;
  --accent-hover:  #b45309;
  --accent-soft:   #fef3e2;
  --border:        #e5e4e0;

  /* Boşluk ölçeği */
  --sp-1: .25rem;  --sp-2: .5rem;   --sp-3: .75rem;  --sp-4: 1rem;
  --sp-5: 1.5rem;  --sp-6: 2rem;    --sp-7: 3rem;    --sp-8: 4rem;

  /* Yapı */
  --container: 1200px;
  --header-h:  72px;
  --radius:    10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(20,20,18,.05);
  --shadow-md: 0 4px 16px rgba(20,20,18,.07);
  --shadow-lg: 0 12px 32px rgba(20,20,18,.10);

  --ease: cubic-bezier(.22,.61,.36,1);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

/* ------------------------------ Reset ------------------------------ */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--sp-4));
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
a  { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 700; letter-spacing: -.02em; }
p { margin: 0 0 var(--sp-4); }
p:last-child { margin-bottom: 0; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute; left: var(--sp-4); top: -100px; z-index: 200;
  background: var(--text); color: var(--text-invert);
  padding: var(--sp-3) var(--sp-4); border-radius: var(--radius);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: var(--sp-4); }

/* ------------------------------ Layout ------------------------------ */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}

.section { padding-block: clamp(4rem, 8vw, 7rem); }
.section-alt { background: var(--bg-alt); }

.section-head {
  max-width: 680px;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-title {
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  margin-bottom: var(--sp-4);
}

.section-lead {
  color: var(--text-muted);
  font-size: 1.075rem;
}

.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--sp-3);
}

/* ------------------------------ Butonlar ------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: .85rem 1.6rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 600;
  font-size: .975rem;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: var(--text-invert);
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--text); background: #fff; }

.btn-sm { padding: .6rem 1.15rem; font-size: .9rem; }
.btn-block { width: 100%; }

/* ------------------------------ Header ------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,.88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

.logo { display: inline-flex; align-items: center; gap: var(--sp-3); }
.logo-mark { width: 30px; height: 30px; fill: var(--accent); flex: none; }
.logo-text {
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: .06em;
}
.logo-text strong { font-weight: 800; }

.nav { display: flex; align-items: center; gap: var(--sp-6); }
.nav-list { display: flex; align-items: center; gap: var(--sp-5); }

.nav-link {
  position: relative;
  font-size: .95rem;
  font-weight: 500;
  color: var(--text-muted);
  padding-block: var(--sp-2);
  transition: color .2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform .25s var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-link.is-active { color: var(--text); font-weight: 600; }
.nav-link.is-active::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 0 10px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}
.nav-toggle-bar {
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ------------------------------ Hero ------------------------------ */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: clamp(520px, 82vh, 780px);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1100px 520px at 78% 12%, var(--accent-soft) 0%, transparent 62%),
    linear-gradient(180deg, #fbfbfa 0%, #ffffff 100%);
}
/* İnce teknik ızgara dokusu */
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(28,28,26,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28,28,26,.05) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(circle at 72% 30%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 72% 30%, #000 0%, transparent 72%);
}

.hero-inner { position: relative; max-width: 780px; }

.hero-title {
  font-size: clamp(2.4rem, 6.2vw, 4.5rem);
  letter-spacing: -.035em;
  margin-bottom: var(--sp-5);
}

.hero-lead {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--text-muted);
  max-width: 58ch;
  margin-bottom: var(--sp-7);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); }

/* ------------------------------ Hakkımızda ------------------------------ */

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}

.about-text p { color: var(--text-muted); }

.check-list { margin-top: var(--sp-5); display: grid; gap: var(--sp-3); }
.check-list li {
  position: relative;
  padding-left: 2rem;
  color: var(--text);
  font-weight: 500;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .45em;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23d97706'%3E%3Cpath d='M9 16.2L4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/12px no-repeat;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat {
  background: var(--bg);
  padding: var(--sp-6) var(--sp-5);
  text-align: center;
}
.stat-num {
  display: block;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.stat-label {
  display: block;
  margin-top: var(--sp-1);
  font-size: .85rem;
  color: var(--text-muted);
}

/* ------------------------------ Hizmet kartları ------------------------------ */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--sp-5);
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              border-color .25s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #d8d6d0;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  margin-bottom: var(--sp-4);
}
.card-icon svg { width: 24px; height: 24px; fill: var(--accent); }

.card h3 { font-size: 1.15rem; margin-bottom: var(--sp-2); }
.card p  { color: var(--text-muted); font-size: .95rem; }

/* ------------------------------ Projeler ------------------------------ */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-6);
}

.filter {
  padding: .55rem 1.15rem;
  font: inherit;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: all .2s var(--ease);
}
.filter:hover { color: var(--text); border-color: var(--text-muted); }
.filter.is-active {
  background: var(--text);
  border-color: var(--text);
  color: var(--text-invert);
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--sp-5);
}

.project {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.project:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.project[hidden] { display: none; }

/* Fotoğraf gelene kadar gradient yer tutucu.
   Gerçek görsel için: style="--img:url('/assets/img/proje-1.jpg')" */
.project-media {
  aspect-ratio: 16 / 10;
  background-image: var(--img, none);
  background-size: cover;
  background-position: center;
  position: relative;
}
.project-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.14) 1px, transparent 1px);
  background-size: 34px 34px;
}
.project-media-1 { background-color: #33383f; background-image: linear-gradient(135deg,#3a4048,#22262b); }
.project-media-2 { background-color: #4a4238; background-image: linear-gradient(135deg,#5a5044,#2e2a24); }
.project-media-3 { background-color: #2f3b40; background-image: linear-gradient(135deg,#37464c,#1f292d); }
.project-media-4 { background-color: #45403a; background-image: linear-gradient(135deg,#544d44,#2b2823); }
.project-media-5 { background-color: #383c44; background-image: linear-gradient(135deg,#434852,#232629); }
.project-media-6 { background-color: #3d4239; background-image: linear-gradient(135deg,#4a5044,#262a22); }

.project-body { padding: var(--sp-5); }
.project-body h3 { font-size: 1.1rem; margin-bottom: var(--sp-1); }

.badge {
  display: inline-block;
  margin-bottom: var(--sp-3);
  padding: .2rem .6rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.project-meta { color: var(--text-muted); font-size: .9rem; margin: 0; }

.projects-empty {
  margin-top: var(--sp-6);
  color: var(--text-muted);
  text-align: center;
}

/* ------------------------------ İletişim ------------------------------ */

.contact-grid {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.info-list { display: grid; gap: var(--sp-5); }
.info-list li { display: flex; gap: var(--sp-4); align-items: flex-start; }
.info-list strong { display: block; font-size: .82rem; color: var(--text-muted); font-weight: 600; }
.info-list a, .info-list span { color: var(--text); font-weight: 500; }
.info-list a:hover { color: var(--accent); }

.info-icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--border);
}
.info-icon svg { width: 20px; height: 20px; fill: var(--accent); }

.contact-form {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  box-shadow: var(--shadow-sm);
}

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
.field { margin-bottom: var(--sp-4); display: flex; flex-direction: column; }

.field label {
  font-size: .875rem;
  font-weight: 600;
  margin-bottom: var(--sp-2);
}

.field input,
.field select,
.field textarea {
  font: inherit;
  font-size: .95rem;
  color: var(--text);
  padding: .75rem .9rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field textarea { resize: vertical; min-height: 120px; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field.has-error input,
.field.has-error textarea { border-color: #c0392b; }

.field-error {
  font-size: .8rem;
  color: #c0392b;
  margin-top: var(--sp-1);
  min-height: 1em;
}

.form-note {
  margin: var(--sp-3) 0 0;
  font-size: .85rem;
  color: var(--text-muted);
  text-align: center;
}
.form-note.is-success { color: #1e7a45; font-weight: 600; }

/* ------------------------------ Footer ------------------------------ */

.site-footer {
  background: var(--bg-dark);
  color: #b9b9b3;
  padding-top: clamp(3rem, 6vw, 4.5rem);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding-bottom: var(--sp-7);
}

.site-footer .logo-text { color: var(--text-invert); }
.site-footer .logo-mark { fill: var(--accent); }
.footer-brand p { margin-top: var(--sp-4); font-size: .93rem; max-width: 42ch; }

.site-footer h4 {
  color: var(--text-invert);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}

.footer-nav ul, .footer-contact ul { display: grid; gap: var(--sp-3); font-size: .93rem; }
.site-footer a { transition: color .2s var(--ease); }
.site-footer a:hover { color: var(--accent); }

.socials { display: flex; gap: var(--sp-3); margin-top: var(--sp-5); }
.socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.socials a:hover { border-color: var(--accent); background: rgba(217,119,6,.12); }
.socials svg { width: 18px; height: 18px; fill: currentColor; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-block: var(--sp-5);
  font-size: .85rem;
}
.footer-bottom p { margin: 0; }

/* ------------------------------ Reveal animasyonu ------------------------------ */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* JS devre dışıysa içerik gizli kalmasın */
.no-js .reveal { opacity: 1; transform: none; }

/* ------------------------------ Responsive ------------------------------ */

@media (max-width: 980px) {
  .about-grid,
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid  { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--sp-4) var(--sp-5) var(--sp-6);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-list li + li { border-top: 1px solid var(--border); }
  .nav-link { display: block; padding: var(--sp-4) 0; font-size: 1.05rem; }
  .nav-link::after { display: none; }
  .nav-cta { margin-top: var(--sp-5); }

  .field-row { grid-template-columns: 1fr; gap: 0; }
  .hero-actions .btn { flex: 1 1 auto; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
}

/* ------------------------------ Hareket tercihi ------------------------------ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ------------------------------ Yazdırma ------------------------------ */

@media print {
  .site-header, .nav-toggle, .filters, .contact-form, .socials { display: none; }
  body { color: #000; }
  .reveal { opacity: 1; transform: none; }
}