/* ============================================================
   Portfolio — monochrome design system
   Panels are translucent grey "islands": blurred, layered,
   and strictly square. No rounded corners anywhere.
   ============================================================ */

:root {
  --bg:        #12151f;
  --fg:        #ffffff;
  --muted:     #a3a8b8;
  --dim:       #6f7484;
  --line:      #262b3a;
  --line-soft: #1a1e29;

  /* Translucent surfaces */
  --glass:        rgba(255, 255, 255, 0.035);
  --glass-strong: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.09);
  --glass-edge:   rgba(255, 255, 255, 0.16);
  --blur:         blur(18px) saturate(115%);

  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body:    "Inter", ui-sans-serif, system-ui, sans-serif;
  /* Used only inside the project papers */
  --font-paper:   "Merriweather", "Times New Roman", Times, serif;

  --maxw: 1120px;
  --pad: 24px;
  --section-y: 120px;
  --header-h: 86px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* scroll-behavior is deliberately NOT "smooth": Chrome cancels the fragment
   scroll animation here and the jump silently fails (it took two clicks to
   land). app.js animates same-page anchors itself instead. */
html {
  background: var(--bg);
  scroll-padding-top: calc(var(--header-h) + 24px);
}

/* No background here on purpose: html carries it. A negative z-index
   pseudo-element paints *behind* its own element's background, so an opaque
   body background would hide body::before (the starfield and the ambient
   wash) completely. */
body {
  margin: 0;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Ambient light — gives the translucent panels something to pick up.
   Gray-navy wash, kept faint to preserve the flat, quiet page. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(720px circle at 12% 4%, rgba(110, 135, 255, 0.06), transparent 62%),
    radial-gradient(820px circle at 88% 42%, rgba(90, 115, 235, 0.045), transparent 62%),
    radial-gradient(640px circle at 40% 96%, rgba(255,255,255,0.025), transparent 62%),
    /* Veil over the photo — it should register as texture, not scenery. */
    linear-gradient(rgba(18, 21, 31, 0.93), rgba(18, 21, 31, 0.96)),
    url("assets/arkaplan2.jpeg") center / cover no-repeat;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

:focus-visible { outline: 2px solid var(--fg); outline-offset: 3px; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- Panel: the translucent grey island ---------- */

.panel {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-top-color: var(--glass-edge);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease);
}

.panel-pad { padding: 32px; }

@supports not ((backdrop-filter: blur(2px)) or (-webkit-backdrop-filter: blur(2px))) {
  .panel { background: #131316; }
}

/* ---------- Header: floating iOS-style oval navigation ---------- */

.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  background: none;
  border: none;
  pointer-events: none;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 12px;
}

.brand {
  pointer-events: auto;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.02em;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-top-color: var(--glass-edge);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  padding: 12px 20px;
  border-radius: 999px;
}

/* The oval capsule. .nav-goo carries a blurred, high-contrast copy of the
   indicator so its edges melt into a liquid blob as it glides; the real
   link text sits in a separate, unfiltered layer on top. */
.nav {
  pointer-events: auto;
  position: relative;
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-top-color: var(--glass-edge);
  backdrop-filter: blur(26px) saturate(160%);
  -webkit-backdrop-filter: blur(26px) saturate(160%);
  border-radius: 999px;
  padding: 5px;
}

.nav-goo {
  position: absolute;
  inset: 5px;
  z-index: 0;
  pointer-events: none;
  filter: blur(9px) contrast(24);
}

.nav-indicator {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  opacity: 0;
  transition: left 0.5s var(--ease), width 0.5s var(--ease), opacity 0.3s var(--ease);
}

.nav-indicator.is-dropping { animation: nav-drop 0.5s var(--ease); }

@keyframes nav-drop {
  0%   { transform: scaleY(1) scaleX(1); }
  35%  { transform: scaleY(0.55) scaleX(1.2); }
  65%  { transform: scaleY(1.2) scaleX(0.9); }
  100% { transform: scaleY(1) scaleX(1); }
}

.nav a {
  position: relative;
  z-index: 1;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.01em;
  padding: 9px 16px;
  border-radius: 999px;
  transition: color 0.35s var(--ease);
}

.nav a.is-lit { color: var(--bg); }

.nav-toggle {
  display: none;
  pointer-events: auto;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 12px 18px;
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

/* ---------- Sections ---------- */

.section { padding-top: var(--section-y); padding-bottom: var(--section-y); }
.section + .section { padding-top: 0; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 48px;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dim);
  white-space: nowrap;
}

.rule { flex: 1; height: 1px; background: var(--line); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0;
}

h2 { font-size: clamp(28px, 4vw, 40px); }
h3 { font-size: 20px; letter-spacing: -0.01em; }

p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }

.lead { font-size: 18px; color: var(--muted); max-width: 60ch; }
.muted { color: var(--muted); }
.dim { color: var(--dim); }

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

.hero { padding-top: 140px; padding-bottom: 120px; }

.hero h1 {
  font-size: clamp(44px, 9vw, 104px);
  font-weight: 500;
  letter-spacing: -0.04em;
  margin-bottom: 28px;
}

.hero-role {
  font-family: var(--font-display);
  font-size: clamp(14px, 1.6vw, 17px);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 20px;
  border-top: 1px solid var(--line);
  margin-bottom: 28px;
}

.hero-summary {
  font-size: clamp(17px, 2vw, 21px);
  color: var(--muted);
  max-width: 58ch;
  margin-bottom: 44px;
}

.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

/* Subpage header */
.page-head { padding-top: 128px; padding-bottom: 64px; }
.page-head h1 { font-size: clamp(38px, 7vw, 76px); letter-spacing: -0.04em; margin-bottom: 20px; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 22px;
  border: 1px solid var(--fg);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn:hover { background: var(--fg); color: var(--bg); }

.btn-solid { background: var(--fg); color: var(--bg); }
.btn-solid:hover { background: transparent; color: var(--fg); }

.btn-ghost {
  border-color: var(--glass-border);
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--muted);
}

.btn-ghost:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }

.icon-links { display: flex; gap: 10px; }

.icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-top-color: var(--glass-edge);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--muted);
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.icon-link:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.icon-link svg { width: 17px; height: 17px; }

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.about-text p { color: var(--muted); font-size: 17px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  padding: 6px 12px;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.tag:hover { background: var(--glass-strong); color: var(--fg); }

/* ---------- Experience ---------- */

.exp-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }

.col-title {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.exp-item { padding: 24px 0; border-bottom: 1px solid var(--line-soft); }
.exp-item:first-child { padding-top: 0; }
.exp-item:last-child { border-bottom: none; padding-bottom: 0; }

.exp-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 4px;
}

.exp-date {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
  white-space: nowrap;
}

.exp-meta { font-size: 14px; color: var(--muted); margin-bottom: 12px; }

.exp-item ul { margin: 0; padding-left: 18px; }
.exp-item li { font-size: 15px; color: var(--muted); margin-bottom: 6px; }

/* Keyword-first entries: what was built, then the vocabulary. */
.exp-projects { list-style: none; padding: 0; margin: 0 0 12px; }

.exp-projects li {
  position: relative;
  font-size: 15px;
  color: var(--fg);
  padding-left: 16px;
  margin-bottom: 4px;
}

.exp-projects li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background: var(--dim);
}

.exp-keywords { display: flex; flex-wrap: wrap; gap: 6px; }

.keyword {
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  border: 1px solid var(--line);
  padding: 4px 9px;
}

/* ---------- Projects ---------- */

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }

.filter {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--muted);
  padding: 8px 16px;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.filter:hover { border-color: var(--fg); color: var(--fg); }
.filter[aria-pressed="true"] { background: var(--fg); color: var(--bg); border-color: var(--fg); }

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 24px;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.card:hover { background: var(--glass-strong); border-color: rgba(255, 255, 255, 0.18); }
.card:hover .card-cta { color: var(--fg); }

/* The team the project was carried out in, stated before the title. */
.card-affil {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
  margin-bottom: -2px;
}

.card-media {
  aspect-ratio: 16 / 10;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-media img { width: 100%; height: 100%; object-fit: cover; }

.card-media .placeholder {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
}

.card h3 { margin: 0; }
.card p { font-size: 15px; color: var(--muted); margin: 0; }

.card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 6px; }

.card-tag {
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  border: 1px solid var(--line);
  padding: 4px 9px;
}

.card-cta {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  transition: color 0.2s var(--ease);
}

.section-foot { margin-top: 32px; }

/* ---------- Gallery ---------- */

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.gallery-item { margin: 0; overflow: hidden; }

.gallery-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.gallery-item figcaption {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--dim);
  padding: 12px 14px;
}

#gallery-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; margin-top: 0; }

/* ---------- Modal: the project opens as an IEEE-style paper ----------
   The backdrop stays dark and blurred; the panel itself becomes a printed
   sheet — serif, two columns, justified, numbered sections. ------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: rgba(9, 11, 18, 0.72);
  backdrop-filter: blur(30px) saturate(120%);
  -webkit-backdrop-filter: blur(30px) saturate(120%);
  animation: sheet-in 0.4s var(--ease);
}

.modal.is-open { display: block; }

@keyframes sheet-in {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

@supports not ((backdrop-filter: blur(2px)) or (-webkit-backdrop-filter: blur(2px))) {
  .modal { background: #0b0d13; }
}

/* The sheet */
.modal-panel {
  position: relative;
  max-width: 900px;
  margin: 40px auto 64px;
  padding: 56px 60px 64px;
  background: #fbfaf7;
  color: #16181f;
  font-family: var(--font-paper);
  border: 1px solid rgba(0, 0, 0, 0.14);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.55);
}

.modal-close {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 2;
  width: 48px;
  height: 48px;
  background: rgba(9, 11, 18, 0.7);
  border: 1px solid var(--glass-edge);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--fg);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.modal-close:hover { background: var(--fg); color: #0b0d13; }

/* Affiliation badge — the team the work was done in, stated first. */
.paper-badge {
  display: block;
  margin: 0 auto 26px;
  width: fit-content;
  max-width: 100%;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-align: center;
  color: #16181f;
  border: 1px solid #16181f;
  padding: 7px 18px;
}

.paper-badge[hidden] { display: none; }

/* Paper title block */
.modal-panel h3 {
  font-family: var(--font-paper);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.005em;
  text-align: center;
  margin: 0 auto 14px;
  max-width: 30ch;
}

.modal-sub {
  font-family: var(--font-paper);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.01em;
  text-align: center;
  color: #4b4f5c;
  padding-bottom: 26px;
  margin-bottom: 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.18);
}

.modal-sub:empty { border-bottom: none; padding-bottom: 10px; }

/* ---- Two-column body ---- */

.paper-cols {
  column-count: 2;
  column-gap: 30px;
  column-fill: balance;
  margin-top: 26px;
  font-size: 13.5px;
  line-height: 1.62;
  text-align: justify;
  hyphens: auto;
  color: #24272f;
}

.paper-cols p { margin: 0 0 10px; orphans: 2; widows: 2; }
.paper-cols p + .paper-h { margin-top: 16px; }
.paper-cols strong { font-weight: 700; color: #0d0f14; }

.paper-abstract { font-weight: 600; font-style: italic; }
.paper-runin { font-weight: 700; font-style: normal; }

.paper-h {
  font-family: var(--font-paper);
  font-size: 12px;
  font-weight: 700;
  font-variant: small-caps;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: none;
  margin: 18px 0 8px;
  break-after: avoid-column;
  page-break-after: avoid;
}

.paper-list {
  list-style: none;
  padding: 0;
  margin: 4px 0 10px;
  text-align: left;
}

.paper-list li {
  position: relative;
  padding: 0 0 6px 14px;
  break-inside: avoid-column;
}

.paper-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1px;
  background: #6b6f7c;
}

/* Figures sit inside the column flow, IEEE-style with a numbered caption. */
.paper-figure {
  margin: 12px 0 14px;
  break-inside: avoid-column;
  page-break-inside: avoid;
}

.paper-figure img {
  width: 100%;
  display: block;
  border: 1px solid rgba(0, 0, 0, 0.2);
}

.paper-figure figcaption {
  font-size: 11.5px;
  line-height: 1.45;
  text-align: left;
  color: #4b4f5c;
  margin-top: 6px;
}

/* Tables — IEEE style: caption above, small caps, ruled top/bottom only. */
.paper-table {
  break-inside: avoid-column;
  margin: 12px 0 16px;
}

.paper-table-wide { column-span: all; margin: 18px 0 22px; }

.paper-table figcaption {
  font-size: 11px;
  font-variant: small-caps;
  letter-spacing: 0.06em;
  text-align: center;
  color: #16181f;
  margin-bottom: 7px;
}

.paper-table .paper-table-scroll { overflow-x: auto; }

.paper-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11.5px;
  line-height: 1.4;
  text-align: left;
}

.paper-table thead th {
  font-weight: 700;
  font-size: 11px;
  font-variant: small-caps;
  letter-spacing: 0.04em;
  padding: 5px 8px;
  border-top: 1.2px solid #16181f;
  border-bottom: 0.8px solid #16181f;
  white-space: nowrap;
}

.paper-table tbody td {
  padding: 4px 8px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  vertical-align: top;
}

.paper-table tbody tr:last-child td { border-bottom: 1.2px solid #16181f; }

/* Numeric columns read better right-aligned. */
.paper-table td.num, .paper-table th.num { text-align: right; white-space: nowrap; }

/* IEEE's figure* — a wide figure spanning both columns. */
.paper-figure-wide {
  column-span: all;
  margin: 16px 0 18px;
}

.paper-figure-wide figcaption { text-align: center; }

/* KaTeX: display equations are centred in the column and may scroll if wide. */
.paper-cols .katex { font-size: 1.02em; }

.paper-cols .katex-display {
  margin: 12px 0;
  overflow-x: auto;
  overflow-y: hidden;
  break-inside: avoid-column;
}

.modal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid rgba(0, 0, 0, 0.18);
}

.modal-links:empty { display: none; }

.btn-paper {
  border-color: #16181f;
  color: #16181f;
  background: transparent;
}

.btn-paper:hover { background: #16181f; color: #fbfaf7; }

/* ---------- Roadmap ---------- */

.roadmap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.roadmap-item { padding: 30px 26px; }

.roadmap-item .status {
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
  display: block;
  margin-bottom: 14px;
}

.roadmap-item h3 { margin-bottom: 10px; }
.roadmap-item p { font-size: 15px; color: var(--muted); }

/* ---------- Contact / footer ---------- */

.contact-mail {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.5vw, 44px);
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
  transition: border-color 0.25s var(--ease);
}

.contact-mail:hover { border-color: var(--fg); }

.site-footer { padding: 32px 0; border-top: 1px solid var(--glass-border); }

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--dim);
}

/* ---------- Loading / error ---------- */

.state {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
  padding: 32px 0;
}

/* ---------- Reveal on scroll ---------- */

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- About page ---------- */

.stack > * + * { margin-top: 20px; }

.about-block h2 { margin-bottom: 20px; }
.about-block p { color: var(--muted); max-width: 66ch; }
.about-block ul { color: var(--muted); padding-left: 20px; max-width: 66ch; }
.about-block li { margin-bottom: 8px; }

.split { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 32px; align-items: start; }
.split .eyebrow { padding-top: 6px; }

.skill-group + .skill-group { margin-top: 24px; }

.skill-group h4 {
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 12px;
}

/* ---------- OkyanXplore page ---------- */

.manifesto-hero { padding-top: 120px; padding-bottom: 88px; }

.manifesto-hero h1 {
  font-size: clamp(40px, 8vw, 88px);
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.depth-layout { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 0; }

.depth-rail { border-right: 1px solid var(--line); position: relative; }

.depth-mark {
  position: sticky;
  top: calc(var(--header-h) + 32px);
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--dim);
  padding-right: 16px;
  text-align: right;
}

.depth-block { margin-left: 40px; margin-bottom: 20px; padding: 32px; }
.depth-block h2 { font-size: clamp(24px, 3.4vw, 34px); margin-bottom: 20px; }
.depth-block p { color: var(--muted); max-width: 62ch; }
.depth-block ul { color: var(--muted); padding-left: 20px; max-width: 62ch; }
.depth-block li { margin-bottom: 10px; }

.figure {
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 32px;
}

.figure span {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.back-link:hover { color: var(--fg); }

/* .site-header is pointer-events:none so the page stays clickable around the
   floating pills; every interactive child has to opt back in. The header's
   back link (OkyanXplore) was missing this and could not be clicked. */
.site-header .back-link { pointer-events: auto; }

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

@media (max-width: 900px) {
  :root { --section-y: 80px; }

  .nav-goo { display: none; }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: var(--pad);
    right: var(--pad);
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: rgba(18, 21, 31, 0.82);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    border-radius: 26px;
    padding: 8px;
    display: none;
  }

  .nav.is-open { display: flex; }
  .nav a { padding: 12px 16px; font-size: 15px; width: 100%; border-radius: 16px; transition: background 0.3s var(--ease), color 0.3s var(--ease); }
  .nav a.is-lit { background: rgba(255, 255, 255, 0.88); }
  .nav-toggle { display: inline-block; }

  .about-grid { grid-template-columns: 1fr; }
  .exp-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 16px; }
  .panel-pad { padding: 24px; }

  .depth-layout { grid-template-columns: 1fr; }
  .depth-rail { display: none; }
  .depth-block { margin-left: 0; padding: 24px; }

  /* A two-column paper does not survive a phone: fall back to one column. */
  .modal-panel { margin: 0 auto; padding: 76px 22px 56px; border: none; }
  .modal-close { top: 16px; right: 16px; width: 42px; height: 42px; }
  .paper-cols { column-count: 1; font-size: 15px; line-height: 1.68; text-align: left; hyphens: manual; }
  .paper-cols p { margin-bottom: 14px; }
  .paper-h { text-align: left; font-size: 13px; margin-top: 26px; }
  .filters { gap: 6px; }
  .filter { font-size: 11px; padding: 7px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
}