/* ============ Kıvanç Şerefoğlu — personal site v2 ============
   Cream-futurism: warm ivory base, vivid coral→amber gradients,
   teal secondary. Type: Gotham → Metropolis (self-hosted, OFL). */

@font-face {
  font-family: "Metropolis";
  src: url("fonts/Metropolis-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Metropolis";
  src: url("fonts/Metropolis-Medium.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "Metropolis";
  src: url("fonts/Metropolis-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: "Metropolis";
  src: url("fonts/Metropolis-Bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "Metropolis";
  src: url("fonts/Metropolis-ExtraBold.woff2") format("woff2");
  font-weight: 800;
  font-display: swap;
}
@font-face {
  font-family: "Metropolis";
  src: url("fonts/Metropolis-Black.woff2") format("woff2");
  font-weight: 900;
  font-display: swap;
}

:root {
  --bg: #f8f3e8;
  --surface: #fffdf7;
  --surface-2: #f8f2e4;
  --border: #eadfc8;
  --ink: #201a12;
  --muted: #71664f;
  --accent: #f4511e;
  --accent-hot: #ff7a1a;
  --amber: #ffb01f;
  --teal: #0e9594;
  --grad: linear-gradient(120deg, var(--accent) 0%, var(--accent-hot) 55%, var(--amber) 120%);
  --accent-soft: #ffe9dd;
  --teal-soft: #dff3f0;
  --shadow: 0 1px 2px rgba(80, 55, 15, 0.05), 0 14px 36px rgba(80, 55, 15, 0.1);
  --shadow-lift: 0 6px 14px rgba(80, 55, 15, 0.08), 0 24px 54px rgba(80, 55, 15, 0.16);
  --glow: 0 8px 28px rgba(244, 81, 30, 0.35);
  --radius: 22px;
  --font: "Gotham", "Metropolis", -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- ambient futuristic backdrop: drifting gradient orbs + faint grid --- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(560px 400px at 88% -6%, rgba(255, 122, 26, 0.16), transparent 65%),
    radial-gradient(640px 460px at -8% 30%, rgba(14, 149, 148, 0.12), transparent 65%),
    radial-gradient(520px 420px at 60% 115%, rgba(255, 176, 31, 0.14), transparent 65%);
  animation: orbs 24s ease-in-out infinite alternate;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    repeating-linear-gradient(0deg, transparent 0 47px, rgba(80, 55, 15, 0.035) 47px 48px),
    repeating-linear-gradient(90deg, transparent 0 47px, rgba(80, 55, 15, 0.035) 47px 48px);
  mask-image: radial-gradient(75% 65% at 50% 35%, black, transparent);
  pointer-events: none;
}

@keyframes orbs {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(-2.5%, 2%, 0) scale(1.06); }
  100% { transform: translate3d(2%, -2%, 0) scale(1.02); }
}

.layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 1.75rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2.5rem);
  align-items: start;
}

/* ============ Sidebar ============ */

.sidebar {
  position: sticky;
  top: 2.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.6rem;
  text-align: center;
}

.avatar {
  position: relative;
  width: 128px;
  height: 128px;
  margin: 0 auto 1.15rem;
  border-radius: 34px;
  background: var(--grad);
  display: grid;
  place-items: center;
  box-shadow: inset 0 -16px 30px rgba(0, 0, 0, 0.16), var(--glow);
}

/* rotating conic ring */
.avatar::before {
  content: "";
  position: absolute;
  inset: -7px;
  border-radius: 40px;
  padding: 2px;
  background: conic-gradient(from 0deg, var(--accent), var(--amber), var(--teal), var(--accent));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: spin 9s linear infinite;
  opacity: 0.85;
}

@keyframes spin { to { transform: rotate(360deg); } }

.avatar span {
  font-size: 2.6rem;
  font-weight: 900;
  color: #fff8ee;
  letter-spacing: -0.02em;
}

.name {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.7rem;
}

.roles { display: flex; gap: 0.4rem; justify-content: center; flex-wrap: wrap; }

.chip {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.34rem 0.8rem;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid #ffd2bc;
  color: #b23c12;
}

.chip:nth-child(2) { background: var(--teal-soft); border-color: #b7e2dc; color: #0b6e6d; }

.divider { border: 0; border-top: 1px solid var(--border); margin: 1.4rem 0; }

.contact-list { list-style: none; margin: 0; padding: 0; text-align: left; display: grid; gap: 0.95rem; }

.contact-list li { display: flex; gap: 0.8rem; align-items: center; min-width: 0; }

.ico {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--accent);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.contact-list li:hover .ico { transform: translateY(-2px) scale(1.05); box-shadow: var(--glow); }

.ico svg { width: 18px; height: 18px; }

.contact-list small {
  display: block;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.contact-list a, .contact-list div > span {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  word-break: break-all;
}

.contact-list a:hover { color: var(--accent); }

.contact-list div { min-width: 0; }

.socials { display: flex; gap: 0.55rem; justify-content: center; margin-top: 1.4rem; }

.socials a {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.socials a svg { width: 17px; height: 17px; }

.socials a.txt-ico { font-size: 0.7rem; font-weight: 800; letter-spacing: 0.02em; text-decoration: none; }

.socials a:hover {
  color: #fff;
  background: var(--grad);
  border-color: transparent;
  transform: translateY(-3px) scale(1.07);
  box-shadow: var(--glow);
}

/* ============ Tabs ============ */

.main { display: grid; gap: 1.1rem; }

.tabs {
  position: relative;
  display: flex;
  gap: 0.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 17px;
  box-shadow: var(--shadow);
  padding: 0.4rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar { display: none; }

/* sliding indicator pill */
.tab-pill {
  position: absolute;
  top: 0.4rem;
  left: 0;
  height: calc(100% - 0.8rem);
  border-radius: 12px;
  background: var(--grad);
  box-shadow: var(--glow);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), width 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 0;
}

.tabs a {
  position: relative;
  z-index: 1;
  flex: 1;
  text-align: center;
  white-space: nowrap;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  padding: 0.62rem 1rem;
  border-radius: 12px;
  transition: color 0.25s ease;
}

.tabs a:hover { color: var(--ink); }

.tabs a.active { color: #fff; }

/* ============ Panel & views ============ */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1.4rem, 3vw, 2.4rem);
  min-height: 60vh;
}

.view { animation: view-in 0.5s cubic-bezier(0.22, 1, 0.36, 1) both; }

@keyframes view-in {
  from { opacity: 0; transform: translateY(16px); filter: blur(8px); }
  to   { opacity: 1; transform: none; filter: none; }
}

.view-head { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.4rem; flex-wrap: wrap; }

.view-head h2 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0;
  background: linear-gradient(100deg, var(--ink) 55%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.head-line {
  display: block;
  width: 48px;
  height: 4px;
  border-radius: 4px;
  background: var(--grad);
  box-shadow: 0 2px 8px rgba(244, 81, 30, 0.4);
}

.view-head .btn { margin-left: auto; }

.sub-head { font-size: 1.12rem; font-weight: 700; letter-spacing: -0.01em; margin: 2.2rem 0 1rem; }

.prose { color: var(--muted); max-width: 62ch; margin: 0 0 1rem; }

.prose strong { color: var(--ink); font-weight: 700; }

/* ============ Stats ============ */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.9rem;
  margin: 1.8rem 0 0.4rem;
}

.stat {
  position: relative;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 17px;
  padding: 1.15rem 1rem;
  text-align: center;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.stat::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.stat:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: #ffc3a6; }

.stat:hover::before { transform: scaleX(1); }

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat small { color: var(--muted); font-weight: 600; font-size: 0.76rem; }

/* ============ Cards ============ */

.grid { display: grid; gap: 1rem; }

.grid.two { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }

.card {
  position: relative;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.4rem;
  overflow: hidden;
}

.lift { transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.28s ease, border-color 0.28s ease; }

.lift:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); border-color: #ffc3a6; }

/* gradient shine sweep on hover */
.lift::after {
  content: "";
  position: absolute;
  top: 0;
  left: -80%;
  width: 55%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
  pointer-events: none;
}

.lift:hover::after { left: 130%; }

.card-ico {
  font-size: 1.5rem;
  width: 54px;
  height: 54px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent-soft), #fff3d6);
  border: 1px solid #ffd8c2;
  margin-bottom: 0.9rem;
}

.card h4 { margin: 0 0 0.45rem; font-size: 1.02rem; font-weight: 700; letter-spacing: -0.01em; }

.card p { margin: 0; font-size: 0.9rem; color: var(--muted); }

.card-kicker {
  display: block;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.55rem;
}

/* Staggered reveal inside views */
.view .card, .view .stat, .view .timeline li, .view .skill-row {
  animation: rise 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.view :is(.card, .stat, .timeline li, .skill-row):nth-child(1) { animation-delay: 0.05s; }
.view :is(.card, .stat, .timeline li, .skill-row):nth-child(2) { animation-delay: 0.12s; }
.view :is(.card, .stat, .timeline li, .skill-row):nth-child(3) { animation-delay: 0.19s; }
.view :is(.card, .stat, .timeline li, .skill-row):nth-child(4) { animation-delay: 0.26s; }
.view :is(.card, .stat, .timeline li, .skill-row):nth-child(5) { animation-delay: 0.33s; }
.view :is(.card, .stat, .timeline li, .skill-row):nth-child(6) { animation-delay: 0.4s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(18px) scale(0.985); }
  to   { opacity: 1; transform: none; }
}

/* ============ Timeline (resume) ============ */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.4rem;
  border-left: 2px solid var(--border);
  display: grid;
  gap: 1.5rem;
}

.timeline li { position: relative; }

.timeline li::before {
  content: "";
  position: absolute;
  left: calc(-1.4rem - 7px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--grad);
  border: 3px solid var(--surface);
  box-shadow: 0 0 0 2px #ffd2bc, 0 0 12px rgba(244, 81, 30, 0.5);
}

.timeline li:hover::before { animation: pulse 1.2s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 2px #ffd2bc, 0 0 10px rgba(244, 81, 30, 0.4); }
  50%      { box-shadow: 0 0 0 4px #ffd2bc, 0 0 20px rgba(244, 81, 30, 0.7); }
}

.tl-head { display: flex; align-items: baseline; gap: 0.8rem; flex-wrap: wrap; }

.tl-head h4 { margin: 0; font-size: 1rem; font-weight: 700; letter-spacing: -0.01em; }

.tl-date {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 700;
  color: #b23c12;
  background: var(--accent-soft);
  border: 1px solid #ffd2bc;
  padding: 0.2rem 0.68rem;
  border-radius: 999px;
  white-space: nowrap;
}

.tl-place { color: var(--teal); font-size: 0.78rem; font-weight: 700; }

.timeline p { margin: 0.4rem 0 0; font-size: 0.9rem; color: var(--muted); }

/* ============ Skills ============ */

.skills { display: grid; gap: 0.9rem; }

.skill-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 0.8rem;
  align-items: start;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 0.95rem 1.1rem;
}

.skill-label { font-size: 0.8rem; font-weight: 800; padding-top: 0.25rem; }

.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.tags span {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.26rem 0.72rem;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: default;
}

.tags span:hover {
  border-color: transparent;
  color: #fff;
  background: var(--grad);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(244, 81, 30, 0.3);
}

/* ============ Publications / awards ============ */

.pub-list { display: grid; gap: 1rem; }

.pub-top { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.6rem; }

.tag.accent {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #b23c12;
  background: var(--accent-soft);
  border: 1px solid #ffd2bc;
  padding: 0.24rem 0.7rem;
  border-radius: 999px;
}

.pub-year {
  margin-left: auto;
  font-weight: 900;
  font-size: 0.9rem;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pub-venue { font-size: 0.82rem !important; font-weight: 700; color: var(--teal) !important; margin: 0.15rem 0 0.5rem !important; }

.pub-links { display: flex; gap: 0.5rem; margin-top: 0.9rem; }

.proj-link {
  display: inline-block;
  margin-top: 0.85rem;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--accent);
  text-decoration: none;
}

.proj-link:hover { text-decoration: underline; }

.proj-link.muted { color: var(--muted); }

/* ============ Buttons ============ */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 13px;
  padding: 0.62rem 1.2rem;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.22s ease;
}

.btn:hover { transform: translateY(-2px) scale(1.02); box-shadow: var(--shadow-lift); }

.btn:active { transform: translateY(0) scale(0.98); }

.btn.primary { color: #fff; background: var(--grad); border-color: transparent; box-shadow: var(--glow); }

.btn.primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  transition: left 0.55s ease;
}

.btn.primary:hover::after { left: 140%; }

.btn.small { font-size: 0.78rem; padding: 0.44rem 0.9rem; }

/* ============ Contact form ============ */

.contact-form { display: grid; gap: 1rem; max-width: 640px; margin-top: 1.4rem; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.contact-form label { display: grid; gap: 0.35rem; font-size: 0.76rem; font-weight: 800; color: var(--muted); letter-spacing: 0.02em; }

.contact-form input,
.contact-form textarea {
  font-family: var(--font);
  font-size: 0.92rem;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 13px;
  padding: 0.78rem 0.95rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(244, 81, 30, 0.14), 0 0 18px rgba(244, 81, 30, 0.12);
  transform: translateY(-1px);
}

.contact-form .btn { justify-self: start; }

.form-note { color: var(--muted); font-weight: 500; }

/* ============ Footer / entrance ============ */

.panel-foot { margin-top: 2.6rem; padding-top: 1.2rem; border-top: 1px solid var(--border); text-align: center; }

.panel-foot p { margin: 0; font-size: 0.78rem; color: var(--muted); }

.reveal { animation: page-in 0.65s cubic-bezier(0.22, 1, 0.36, 1) both; }

.tabs.reveal { animation-delay: 0.08s; }

.panel.reveal { animation-delay: 0.16s; }

@keyframes page-in {
  from { opacity: 0; transform: translateY(22px); filter: blur(6px); }
  to   { opacity: 1; transform: none; filter: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ============ Responsive ============ */

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; gap: 1.1rem; }

  .sidebar {
    position: static;
    padding: 1.5rem 1.25rem 1.4rem;
  }

  .avatar { width: 96px; height: 96px; border-radius: 26px; }
  .avatar::before { border-radius: 31px; }
  .avatar span { font-size: 2rem; }

  .contact-list { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .ico { width: 36px; height: 36px; border-radius: 11px; }
  .ico svg { width: 15px; height: 15px; }
  .contact-list a, .contact-list div > span { font-size: 0.74rem; }

  .tabs {
    position: sticky;
    top: 0.6rem;
    z-index: 20;
    backdrop-filter: blur(12px);
    background: color-mix(in srgb, var(--surface) 82%, transparent);
  }

  .tabs a { padding: 0.55rem 0.85rem; font-size: 0.82rem; }

  .panel { padding: 1.25rem 1.1rem; border-radius: 18px; }

  .view-head h2 { font-size: 1.45rem; }

  .stats { grid-template-columns: 1fr 1fr; }

  .tl-date { margin-left: 0; }

  .form-row { grid-template-columns: 1fr; }

  .skill-row { grid-template-columns: 1fr; }

  .view-head .btn { margin-left: 0; width: 100%; justify-content: center; }
}

@media (max-width: 480px) {
  .contact-list { grid-template-columns: 1fr; }
  .stats { gap: 0.6rem; }
  .stat-num { font-size: 1.6rem; }
}