/*
  rucoh.github.io — minimal, responsive, no-JS site shell
  Emerald + black palette, improved spacing & Projects styling
*/
:root {
  --bg: #0b0f0e;           /* near-black */
  --panel: #121618;        /* dark elevated */
  --text: #ecf2f1;         /* soft white */
  --muted: #b6c8c4;        /* muted text */
  --brand: #00c896;        /* emerald */
  --brand-600: #00a77d;
  --ring: rgba(0, 200, 150, .35);
  --maxw: 1100px;
  --radius: 18px;
  --header-h: 60px;
  
}
h1[id], h2[id], section[id] {
  scroll-margin-top: calc(var(--header-h) + 12px);
}
#home {
  scroll-margin-top: calc(var(--header-h) + 12px);
}
/* Base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, rgba(0,200,150,.12), transparent 50%),
              radial-gradient(800px 600px at 100% 0%, rgba(0,200,150,.08), transparent 40%),
              var(--bg);
  line-height: 1.6;
}

img { max-width: 100%; height: auto; display: block; }

.container { width: min(100% - 2rem, var(--maxw)); margin-inline: auto; }

h1 { font-size: clamp(1.8rem, 2.6vw + 1rem, 3rem); margin: 0 0 .25rem; }
.kicker { color: var(--brand); font-weight: 600; margin: 0 0 1rem; }
.lead { color: var(--muted); max-width: 70ch; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(8px);
  background: color-mix(in oklab, var(--bg) 85%, black 15%);
  border-bottom: 1px solid color-mix(in oklab, var(--brand) 30%, transparent 70%);
}
.header-inner { display: flex; align-items: center; gap: 1rem; padding: .75rem 0; }

.brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--text); font-weight: 700; }
.logo { width: 36px; height: 36px; border-radius: 12px; background: linear-gradient(135deg, var(--brand), var(--brand-600)); display: grid; place-items: center; color: #06251d; font-weight: 900; }
.brand-text { letter-spacing: .5px; opacity: .9; }

.nav { margin-left: auto; display: flex; flex-wrap: wrap; gap: .5rem 1rem; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 600; padding: .4rem .6rem; border-radius: 10px; }
.nav a:hover, .nav a:focus { outline: none; color: var(--text); background: rgba(255,255,255,.06); box-shadow: 0 0 0 4px var(--ring); transition-duration: 0.5s;}

/* Hero */
.hero { display: grid; grid-template-columns: 120px 1fr; gap: 1.2rem; align-items: center; padding: 2rem 0; }
.hero-media img { border-radius: 50%; border: 3px solid color-mix(in oklab, var(--brand) 60%, white 40%); box-shadow: 0 10px 30px rgba(0,0,0,.5), 0 0 0 10px rgba(0,200,150,.08); }
.social { display: flex; gap: .75rem; margin-top: 1rem; flex-wrap: wrap; }
.social a { color: var(--text); text-decoration: none; font-weight: 600; padding: .45rem .75rem; border-radius: 999px; background: linear-gradient(135deg, rgba(255,255,255,.06), rgba(255,255,255,.02)); border: 1px solid rgba(255,255,255,.08); }
.social a:hover { box-shadow: 0 0 0 4px var(--ring); transition-duration: 0.5s;}

/* Cards & sections */
.card {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: 0 10px 25px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.04);
  margin: 1rem 0;
}
.card h2 { margin-top: 0; font-size: clamp(1.2rem, 1.2vw + 1rem, 1.6rem); }

/* CV section */
.cv-note { color: var(--muted); margin-top: -.25rem; }

.cv-actions {
  display: flex; flex-wrap: wrap; gap: .6rem;
  margin: .6rem 0 1rem;
}

/* Emerald/siyah temaya uygun buton pilli */
.btn-pill {
  display: inline-block;
  padding: .55rem .95rem;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  color: var(--text);
  background: linear-gradient(135deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.10);
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn-pill:hover { transform: translateY(-1px); box-shadow: 0 0 0 4px var(--ring); transition-duration: 0.5s;}

/* PDF önizleme kutusu — responsive yükseklik */
.cv-preview {
  height: clamp(60vh, 72vh, 88vh);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.08);
  background: #0d1312;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
}

/* Küçük ekranlarda önizleme biraz daha kısa */
@media (max-width: 600px) {
  .cv-preview { height: 68vh; }
}

/* Token chips (Projects için de kullanılıyor) */
.chips { display: flex; flex-wrap: wrap; gap: .8rem; padding-left: 0; list-style: none; }
.chips li, .chips a {
  padding: .65rem 1.1rem;
  border-radius: 999px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  display: inline-flex; align-items: center; gap: .45rem;
  background: linear-gradient(180deg, rgba(0,200,150,.16), rgba(0,200,150,.10));
  border: 1px solid rgba(0,200,150,.40);
  box-shadow: inset 0 0 0 1px rgba(0,255,200,.06);
  transition: transform .50s ease, box-shadow .50s ease, background .50s ease;
}
.chips a .ext, .chips a i { font-size: .85em; opacity: .9; margin-left: .2rem; vertical-align: -0.05em; }
.chips a:hover { transform: translateY(-1px); box-shadow: 0 8px 18px rgba(0,200,150,.18), 0 0 0 4px var(--ring); background: linear-gradient(180deg, rgba(0,200,150,.22), rgba(0,200,150,.14)); }
.chips a:active { transform: translateY(0); box-shadow: 0 2px 10px rgba(0,0,0,.4), 0 0 0 4px var(--ring); }
.chips a:focus-visible { outline: none; box-shadow: 0 0 0 4px var(--ring); }

.contact-button { padding:.5rem .9rem; border-radius:999px; border:1px solid rgba(255,255,255,.12); background:rgba(255,255,255,.06); color:inherit; font-weight:700; cursor:pointer; text-decoration: none; }
.contact-button:hover { box-shadow:0 0 0 4px rgba(0,200,150,.35); transition-duration: 0.5s; }


.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.gallery-grid img {
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.08);
  background: #0d1312;
  box-shadow: 0 2px 12px rgba(0,0,0,.4);
  transition: transform .3s ease, box-shadow .3s ease;
}

.gallery-grid img:hover {
  transform: scale(1.03);
  box-shadow: 0 6px 20px rgba(0,0,0,.5);
}


/* Two-column grid */
.grid-two { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 800px) { .grid-two { grid-template-columns: 1fr 1fr; } }

/* Tags */
.tags { display: flex; flex-wrap: wrap; gap: .5rem; padding-left: 0; list-style: none; }
.tags li { padding: .35rem .6rem; border-radius: 8px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); }
.sub { margin: .5rem 0 .35rem; color: var(--muted); font-weight: 700; }

/* Timeline */
.timeline { display: grid; gap: .9rem; }
.timeline .item { display: grid; grid-template-columns: 110px 1fr; gap: .75rem; align-items: start; }
.timeline .when { color: var(--brand); font-weight: 700; }
.timeline h3 { margin: 0 0 .15rem; font-size: 1rem; }
.timeline p { margin: 0; color: var(--muted); }

/* Footer */
.site-footer { margin: 2rem 0 3rem; color: var(--muted); }
.site-footer .container { border-top: 1px dashed rgba(255,255,255,.12); padding-top: 1rem; }

/* Accessibility & polish */
:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto; } }

/* Small-screen tweaks */
@media (max-width: 520px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero-media { display: grid; place-items: center; }
  .nav { gap: .4rem .6rem; }
}

/* Optional light theme (OS tercihini takip eder) */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5fbfa;
    --panel: #ffffff;
    --text: #0c1412;
    --muted: #3a4a46;
    --ring: rgba(0, 200, 150, .25);
  }
  body {
    background: radial-gradient(900px 700px at 10% -10%, rgba(0,200,150,.12), transparent 50%),
                radial-gradient(700px 500px at 100% 0%, rgba(0,200,150,.08), transparent 40%),
                var(--bg);
  }
  .site-header { background: color-mix(in oklab, var(--bg) 85%, white 15%); }
  .chips a, .chips li { border-color: rgba(0,200,150,.35); }
}

/* Print */
@media print {
  body { background: #fff; color: #000; }
  .site-header, .site-footer { border: none; backdrop-filter: none; }
  .card { box-shadow: none; border: 1px solid #ccc; }
}

/* --- Projects (scoped) --- */
#projects .projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: .75rem;
}

#projects .project-card {
  border: 1px solid rgba(0,200,150,.35);
  border-radius: 16px;
  padding: 0.9rem 1rem;
  background: linear-gradient(180deg, rgba(0,200,150,.10), rgba(0,200,150,.06));
  box-shadow: inset 0 0 0 1px rgba(0,255,200,.05);
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}

#projects .project-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(0,200,150,.18), 0 0 0 4px var(--ring);
  background: linear-gradient(180deg, rgba(0,200,150,.16), rgba(0,200,150,.08));
}

#projects .project-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
}

#projects .project-title {
  margin: 0;
  font-size: 1.05rem;
}

#projects .project-open {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  transition: box-shadow .5s ease, background .5s ease;
}
#projects .project-open:hover { box-shadow: 0 0 0 4px var(--ring); }

#projects .project-desc {
  margin: .5rem 0 .6rem;
  color: var(--muted);
}

#projects .project-tags {
  display: flex; flex-wrap: wrap; gap: .4rem .5rem;
  list-style: none; padding: 0; margin: 0;
}
#projects .project-tags li {
  padding: .28rem .55rem;
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  font-size: .85rem;
}