/* ============================================================
   Berker DAL — Kişisel Akademik Web Sayfası
   Tema: Brushed Steel (fırçalanmış çelik) · Siyah sinir ağı
   ============================================================ */

:root {
  --steel-0: #f4f5f7;
  --steel-1: #e6e8ec;
  --steel-2: #d7dae0;
  --steel-3: #c3c7cf;
  --ink: #14151a;          /* siyah — ağ ve vurgular */
  --ink-soft: #3c3f47;
  --ink-dim: #6b6f78;
  --line: rgba(20, 21, 26, 0.14);
  --plate-edge: rgba(255, 255, 255, 0.85);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; }

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--ink-soft);
  line-height: 1.65;
  overflow-x: hidden;
  /* Fırçalanmış çelik zemin: ince yatay tarama + metalik ışık geçişleri */
  background:
    repeating-linear-gradient(180deg,
      rgba(255, 255, 255, 0.055) 0px, rgba(255, 255, 255, 0.055) 1px,
      transparent 1px, transparent 3px),
    repeating-linear-gradient(0deg,
      rgba(20, 21, 26, 0.022) 0px, rgba(20, 21, 26, 0.022) 1px,
      transparent 1px, transparent 2px),
    linear-gradient(115deg,
      var(--steel-1) 0%, var(--steel-0) 22%, var(--steel-2) 45%,
      var(--steel-0) 62%, var(--steel-3) 85%, var(--steel-1) 100%);
  background-attachment: fixed;
}

::selection { background: var(--ink); color: var(--steel-0); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--steel-1); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #9ba0aa, #7c8089);
  border-radius: 8px;
  border: 2px solid var(--steel-1);
}

/* ============ Sinir ağı arka planı ============ */
#net-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
}

/* ============ Üst bant ============ */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 36px;
  pointer-events: none;
}

/* Sol: mini ağ logosu + kazınmış isim */
.brand {
  display: flex;
  align-items: center;
  gap: 13px;
}
.brand-mark {
  width: 36px;
  height: 26px;
  color: var(--ink);
  opacity: 0.85;
}
.pulse-node { animation: node-pulse 2.4s ease-in-out infinite; }
@keyframes node-pulse {
  0%, 100% { opacity: 0.35; }
  50%      { opacity: 1; }
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 5px;
  color: var(--ink);
  /* Çeliğe kazınmış (letterpress) etki */
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.85);
}
.brand-name b {
  font-weight: 700;
  margin-left: 8px;
  color: transparent;
  -webkit-text-stroke: 1px var(--ink);
  text-shadow: none;
}

/* Sağ blok: alan etiketleri + dil düğmesi */
.topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Dil değiştirici — aktif olmayan dilin bayrağı */
.lang-toggle {
  pointer-events: auto;
  appearance: none;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0.85;
  transition: opacity .25s, transform .25s;
}
.lang-toggle img {
  display: block;
  width: 27px;
  height: 18px;
  object-fit: cover;
  border-radius: 3px;
  border: 1px solid rgba(20, 21, 26, 0.25);
  box-shadow: 0 1px 3px rgba(20, 21, 26, 0.3);
}
.lang-toggle:hover { opacity: 1; transform: translateY(-2px); }

/* Sağ: düğümlerle bağlı alan etiketleri */
.topbar-fields {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 2.5px;
  color: var(--ink-dim);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
}
.topbar-fields i {
  position: relative;
  width: 24px;
  height: 1px;
  background: rgba(20, 21, 26, 0.25);
}
.topbar-fields i::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 4px; height: 4px;
  border-radius: 50%;
  background: rgba(20, 21, 26, 0.5);
}

/* ============ Ana plaka ============ */
.plate {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: 340px 1fr;
  width: min(1080px, calc(100% - 40px));
  min-height: 620px;
  margin: 96px auto 40px;
  border-radius: 18px;
  /* Metal plaka: hafif dikey fırça dokusu + kenar parlaması */
  background:
    repeating-linear-gradient(90deg,
      rgba(255, 255, 255, 0.05) 0px, rgba(255, 255, 255, 0.05) 1px,
      transparent 1px, transparent 4px),
    linear-gradient(160deg, #fbfcfd 0%, #eef0f3 40%, #e2e5ea 100%);
  border: 1px solid rgba(20, 21, 26, 0.16);
  box-shadow:
    inset 0 1px 0 var(--plate-edge),
    inset 0 -1px 0 rgba(20, 21, 26, 0.08),
    0 1px 2px rgba(20, 21, 26, 0.08),
    0 24px 60px -18px rgba(20, 21, 26, 0.35);
  overflow: hidden;
}

/* Köşe vidaları */
.plate-screw {
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, #ffffff, #c9cdd4 45%, #8e939c 100%);
  box-shadow:
    inset 0 1px 2px rgba(255, 255, 255, 0.9),
    inset 0 -1px 2px rgba(20, 21, 26, 0.35),
    0 1px 2px rgba(20, 21, 26, 0.25);
  z-index: 6;
}
.plate-screw::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 8px; height: 1.6px;
  background: rgba(20, 21, 26, 0.45);
  transform: translate(-50%, -50%) rotate(38deg);
  border-radius: 2px;
}
.plate-screw.tl { top: 14px; left: 14px; }
.plate-screw.tr { top: 14px; right: 14px; transform: rotate(70deg); }
.plate-screw.bl { bottom: 14px; left: 14px; transform: rotate(-50deg); }
.plate-screw.br { bottom: 14px; right: 14px; transform: rotate(15deg); }

/* ============ Sol profil sütunu ============ */
.profile {
  padding: 40px 36px 32px;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.35), rgba(255, 255, 255, 0) 30%),
    repeating-linear-gradient(90deg,
      rgba(20, 21, 26, 0.016) 0px, rgba(20, 21, 26, 0.016) 1px,
      transparent 1px, transparent 3px);
  display: flex;
  flex-direction: column;
}

.photo-frame {
  position: relative;
  width: 168px;
  height: 168px;
  border-radius: 50%;
  padding: 5px;
  margin-bottom: 20px;
  /* Metal çerçeve halkası */
  background: conic-gradient(from 210deg,
    #f8f9fb, #b9bec7 18%, #eff1f4 34%, #9ea3ad 52%,
    #f2f4f6 68%, #c3c7cf 84%, #f8f9fb);
  box-shadow:
    0 2px 6px rgba(20, 21, 26, 0.22),
    inset 0 1px 1px rgba(255, 255, 255, 0.9);
}
.photo-frame img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  border: 1px solid rgba(20, 21, 26, 0.15);
}
.photo-fallback {
  display: none;               /* fotoğraf yoksa JS ile açılır */
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(160deg, #eceef1, #d8dbe1);
  border: 1px dashed rgba(20, 21, 26, 0.28);
  color: var(--ink-dim);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  line-height: 1.5;
  padding: 12px;
}
.photo-fallback svg { width: 44px; height: 44px; margin-bottom: 4px; }

.profile-name {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--ink);
  line-height: 1.1;
}
.profile-name span {
  display: block;
  letter-spacing: 4px;
}

.profile-title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 9px 0 7px;
}

.profile-org {
  font-size: 0.85rem;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.profile-bio {
  font-size: 0.88rem;
  color: var(--ink-dim);
  margin-bottom: 16px;
  text-align: justify;
}

.profile-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 0;
}
.profile-tags span {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 1px;
  padding: 5px 12px;
  border-radius: 100px;
  color: var(--steel-0);
  background: linear-gradient(180deg, #34363e, var(--ink));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 1px 3px rgba(20, 21, 26, 0.3);
}

/* --- Sosyal medya ikonları (siyah-beyaz, İletişim sekmesinde) --- */
.social-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 72px;
  color: var(--ink);
  text-decoration: none;
  opacity: 0.7;
  filter: grayscale(1);
  transition: opacity .25s, transform .25s;
}
/* Tüm ikonlar aynı görsel yükseklikte (24px); geniş logolar orantılı genişler */
.social-btn svg { width: 24px; height: 24px; }
.social-btn img {
  height: 24px;
  width: auto;
  max-width: 46px;
  object-fit: contain;
  /* Siyah-beyaz filtre — tasarım diline uyum */
  filter: grayscale(1) contrast(1.15);
}
.social-btn span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.5px;
  color: var(--ink-dim);
}
.social-btn:hover {
  opacity: 1;
  transform: translateY(-3px);
}

/* ============ Sağ içerik ============ */
.content {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* --- Kaydırma rayı (panel içeriği taşınca sağ kenarda) --- */
.scroll-rail {
  position: absolute;
  right: 12px;
  top: 76px;
  bottom: 20px;
  z-index: 8;
  width: 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s;
}
.scroll-rail.visible { opacity: 1; pointer-events: auto; }

.rail-arrow {
  width: 22px; height: 22px;
  display: grid;
  place-items: center;
  border: none;
  background: none;
  color: var(--ink);
  opacity: 0.45;
  cursor: pointer;
  transition: opacity .3s;
}
.rail-arrow:hover { opacity: 1; }
.rail-arrow.up   { animation: rail-bob-up 2.2s ease-in-out infinite; }
.rail-arrow.down { animation: rail-bob-down 2.2s ease-in-out infinite; }
.rail-arrow.disabled { opacity: 0.12; pointer-events: none; animation: none; }
@keyframes rail-bob-up   { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-3px); } }
@keyframes rail-bob-down { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(3px); } }

.rail-track {
  position: relative;
  flex: 1;
  width: 2px;
  border-radius: 2px;
  background: rgba(20, 21, 26, 0.10);
}
.rail-thumb {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 5px;
  height: 36px;
  border-radius: 4px;
  background: linear-gradient(180deg, #43454e, var(--ink));
  box-shadow: 0 1px 3px rgba(20, 21, 26, 0.3);
  transition: top .1s linear;
}

/* --- Sekmeler --- */
.tabs-wrap { position: relative; }

/* Yatay kaydırma ipuçları — sadece mobilde görünür */
.tab-scroll-hint {
  display: none;
  position: absolute;
  top: 0;
  bottom: 0;
  width: 30px;
  place-items: center;
  z-index: 10;
  border: none;
  background: none;
  color: var(--ink);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s;
}
.tab-scroll-hint.left {
  left: 0;
  background: linear-gradient(90deg, rgba(238, 240, 243, 0.95), transparent);
}
.tab-scroll-hint.right {
  right: 0;
  background: linear-gradient(-90deg, rgba(238, 240, 243, 0.95), transparent);
}
.tab-scroll-hint.visible {
  opacity: 1;
  pointer-events: auto;
}
.tab-scroll-hint.visible svg { animation: hint-pulse 1.8s ease-in-out infinite; }
.tab-scroll-hint.right.visible svg { animation-name: hint-pulse-r; }
@keyframes hint-pulse {
  0%, 100% { opacity: 0.3; transform: translateX(0); }
  50%      { opacity: 0.85; transform: translateX(-2px); }
}
@keyframes hint-pulse-r {
  0%, 100% { opacity: 0.3; transform: translateX(0); }
  50%      { opacity: 0.85; transform: translateX(2px); }
}

.tabs {
  position: relative;
  display: flex;
  gap: 4px;
  padding: 18px 28px 0;
  border-bottom: 1px solid var(--line);
}
.tab {
  position: relative;
  z-index: 2;
  appearance: none;
  border: none;
  background: none;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  color: var(--ink-dim);
  padding: 12px 20px 16px;
  cursor: pointer;
  transition: color .25s;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--ink); font-weight: 600; }

.tab-indicator {
  position: absolute;
  bottom: -1px;
  height: 2.5px;
  background: var(--ink);
  border-radius: 2px 2px 0 0;
  transition: left .35s cubic-bezier(.3,.9,.3,1), width .35s cubic-bezier(.3,.9,.3,1);
  box-shadow: 0 -1px 8px rgba(20, 21, 26, 0.3);
}

/* --- Paneller --- */
.panels {
  position: relative;
  flex: 1;
  padding: 34px 40px 40px;
  overflow-y: auto;
  /* Kaydırma çubuğu gizli — yön bilgisini oklar veriyor */
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.panels::-webkit-scrollbar { display: none; }
.panel {
  display: none;
  animation: panel-in .45s cubic-bezier(.2,.8,.2,1);
}
.panel.active { display: block; }
@keyframes panel-in {
  from { opacity: 0; transform: translateX(18px); }
  to   { opacity: 1; transform: translateX(0); }
}

.panel-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 26px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.panel-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

.panel-note {
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
}
.panel-note code {
  background: rgba(20, 21, 26, 0.06);
  border: 1px solid var(--line);
  padding: 1px 7px;
  border-radius: 5px;
}

/* --- Eğitim --- */
.edu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  position: relative;
}
.edu {
  position: relative;
  display: flex;
  gap: 20px;
  align-items: center;
  padding: 16px 0;
}
.edu-body { flex: 1; min-width: 0; } /* link butonu satırın sağına yaslansın */
.edu-logo {
  width: 56px; height: 56px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
}
.edu-logo img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  /* Siyah-beyaz — tasarım diline uyum; hover'da orijinal renk */
  filter: grayscale(1) contrast(1.1);
  opacity: 0.85;
  transition: filter .3s, opacity .3s;
}
.edu-years {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 1.5px;
  color: var(--ink-dim);
}
.edu h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin: 2px 0 1px;
}
.edu p { font-size: 0.82rem; color: var(--ink-dim); }
.edu p.edu-loc {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.5px;
  margin-top: 2px;
}
.edu:hover .edu-logo img { filter: none; opacity: 1; }

/* --- Yayınlar --- */
.pub-group-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 26px 0 6px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.pub-group-title:first-of-type { margin-top: 0; }

/* Proje logoları (TÜBİTAK) */
/* Seçici .pub > div'den daha özgül olmalı, yoksa oradaki flex: 1 logoyu esnetiyor */
.pub > .proj-logo {
  flex: 0 0 52px;
  width: 52px; height: 52px;
  min-width: 0;
  display: grid;
  place-items: center;
}
.proj-logo img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  filter: grayscale(1) contrast(1.1);
  opacity: 0.85;
  transition: filter .25s, opacity .25s;
}
.pub:hover .proj-logo img { filter: none; opacity: 1; }
.pub-group-title::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #43454e, var(--ink) 70%);
  box-shadow: 0 1px 2px rgba(20, 21, 26, 0.3);
}
.pub-list { list-style: none; display: flex; flex-direction: column; }
.pub {
  display: flex;
  gap: 20px;
  align-items: center;
  padding: 18px 6px;
  border-bottom: 1px solid var(--line);
  transition: background .25s, padding-left .25s;
}
.pub:hover { background: rgba(255, 255, 255, 0.45); padding-left: 14px; }
.pub-year {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  min-width: 52px;
}
.pub > div { flex: 1; min-width: 0; }
.pub-type {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.pub h3 {
  font-family: var(--font-display);
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--ink);
  margin: 3px 0 4px;
  line-height: 1.4;
}
.pub p { font-size: 0.78rem; color: var(--ink-dim); }
.pub-authors strong { color: var(--ink); font-weight: 600; }
.pub-venue { font-style: italic; margin-top: 1px; }
.pub-link {
  width: 38px; height: 38px;
  flex-shrink: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  text-decoration: none;
  font-size: 1rem;
  color: var(--ink);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #e8eaee);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 1px 3px rgba(20, 21, 26, 0.12);
  transition: all .25s;
}
.pub-link:hover {
  background: var(--ink);
  color: var(--steel-0);
  transform: rotate(45deg);
}

/* --- Dosyalar --- */
.file-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.file {
  display: flex;
  gap: 18px;
  align-items: center;
  padding: 16px 20px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.15));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: transform .25s, box-shadow .25s;
}
.file:hover {
  transform: translateX(6px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8), 0 8px 20px rgba(20, 21, 26, 0.12);
}
.file-badge {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 1px;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--steel-0);
  background: linear-gradient(180deg, #34363e, var(--ink));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.file > div { flex: 1; }
.file h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
}
.file p { font-size: 0.78rem; color: var(--ink-dim); }
.file-dl {
  width: 38px; height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--ink);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #e8eaee);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 1px 3px rgba(20, 21, 26, 0.12);
  transition: all .25s;
}
.file-dl:hover { background: var(--ink); color: var(--steel-0); }

/* --- Ders alt listesi (Ders Notları altında) --- */
.course-list {
  list-style: none;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.course {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.1));
  transition: transform .25s, box-shadow .25s;
}
.course:hover {
  transform: translateX(5px);
  box-shadow: 0 6px 16px rgba(20, 21, 26, 0.1);
}
.course-code {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 1px;
  padding: 5px 9px;
  border-radius: 6px;
  color: var(--steel-0);
  background: linear-gradient(180deg, #34363e, var(--ink));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
  white-space: nowrap;
}
.course-name {
  flex: 1;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink);
}
.pub-link.small {
  width: 30px; height: 30px;
  font-size: 0.85rem;
}

/* --- İletişim --- */
.contact-lead {
  font-size: 0.92rem;
  color: var(--ink-dim);
  max-width: 420px;
  margin-bottom: 26px;
}
.contact-mail-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--steel-0);
  text-decoration: none;
  padding: 14px 26px;
  border-radius: 12px;
  background: linear-gradient(180deg, #34363e, var(--ink));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 6px 18px rgba(20, 21, 26, 0.3);
  transition: transform .25s, box-shadow .25s;
  margin-bottom: 30px;
}
.contact-mail-btn:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 12px 28px rgba(20, 21, 26, 0.4);
}
.contact-socials {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 10px;
  padding-top: 6px;
}

/* ============ Footer ============ */
.footer {
  position: relative;
  z-index: 5;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 1.5px;
  color: var(--ink-dim);
  padding: 0 20px 30px;
}

/* ============ Masaüstü: sayfa kaydırmasız, plaka sabit ============ */
@media (min-width: 901px) {
  html, body { overflow: hidden; }
  body {
    display: flex;
    flex-direction: column;
    height: 100vh;
  }
  .plate {
    flex: 1;
    min-height: 0;              /* flex çocuğunun taşabilmesi için */
    margin: 88px auto 16px;
  }
  .profile {
    overflow-y: auto;
    min-height: 0;
    scrollbar-width: none;
  }
  .profile::-webkit-scrollbar { display: none; }
  .content { min-height: 0; }
  .footer {
    flex-shrink: 0;
    padding: 0 20px 18px;
  }
}

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .scroll-rail { display: none; }
  .plate {
    grid-template-columns: 1fr;
    margin-top: 84px;
    /* Sekmelerin sticky çalışabilmesi için (overflow:hidden sticky'yi kırar) */
    overflow: visible;
  }
  /* Plaka köşe yuvarlaklığı overflow:visible ile kaybolmasın */
  .profile { border-radius: 18px 18px 0 0; }

  /* ML · NLP · AI etiketi mobilde gizli */
  .topbar-fields { display: none; }

  /* Sekmeler: kaydırınca header'ın altına yapışır (sarmalayıcı sticky) */
  .tabs-wrap {
    position: sticky;
    top: 45px;                     /* mobil header bar yüksekliği */
    z-index: 9;
    background: rgba(238, 240, 243, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  /* Yatay kaydırma ipuçları aktif */
  .tab-scroll-hint { display: grid; }
  .profile {
    border-right: none;
    border-bottom: 1px solid var(--line);
    align-items: center;
    text-align: center;
    padding: 40px 28px 32px;
  }
  .profile-name span { letter-spacing: 2px; }
  .profile-tags { justify-content: center; padding-bottom: 20px; }
  .tabs {
    padding: 12px 14px 0;
    overflow-x: auto;
    overflow-y: hidden;
    /* Kaydırma çubukları gizli — yön bilgisini ‹ › ipuçları veriyor */
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .tabs::-webkit-scrollbar { display: none; }
  .tab { padding: 10px 14px 14px; font-size: 0.85rem; white-space: nowrap; }
  .panels { padding: 26px 22px 32px; }
  /* Sabit header'ın altına ince, %75 opak bar — kayan metinle karışmasın */
  .topbar {
    padding: 10px 22px;
    background: rgba(233, 235, 239, 0.75);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(20, 21, 26, 0.08);
    box-shadow: 0 1px 8px rgba(20, 21, 26, 0.06);
  }
  .plate { margin-top: 72px; }
}

@media (max-width: 480px) {
  .pub { flex-wrap: wrap; }
  .pub-year { min-width: auto; }
}