/* ==========================================================================
   Ria Karakasis · portfolio stylesheet
   Light, modern and professional. White ground, soft blue accents,
   generous whitespace. No frameworks, no build step.
   ========================================================================== */

:root {
  --font-display: "Plus Jakarta Sans", "Inter", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;

  --bg: #ffffff;
  --bg-soft: #f5f9fd;
  --card: #ffffff;
  --line: #e4ebf3;
  --line-strong: #cbd8e6;
  --text: #0f1b2d;
  --text-2: #33415a;
  --muted: #5f6f86;
  --blue: #3b8ded;
  --blue-hover: #2f7fdc;
  --blue-deep: #1b66c4;
  --blue-soft: #e6f1fc;
  --blue-softer: #f3f8fe;
  --blue-line: #cfe2f8;
  --blue-ring: rgba(59, 141, 237, 0.22);
  --ok: #22a06b;
  --ok-soft: rgba(34, 160, 107, 0.16);
  --shadow-sm: 0 1px 2px rgba(15, 27, 45, 0.04), 0 4px 12px rgba(15, 27, 45, 0.05);
  --shadow: 0 12px 32px rgba(15, 27, 45, 0.09);
  --shadow-lg: 0 28px 64px rgba(15, 27, 45, 0.14);
  --radius: 20px;
  --radius-sm: 12px;
  --container: 1120px;
  --nav-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--blue-deep); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

::selection { background: var(--blue-soft); color: var(--text); }

:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; }

.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: var(--blue);
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 600;
}
.skip-link:focus { top: 12px; text-decoration: none; }

/* ---------- Typography ---------- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; color: var(--text); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-deep);
  margin: 0 0 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; border-radius: 2px; background: var(--blue); }

.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  line-height: 1.12;
  margin: 0 0 14px;
}
.lead { color: var(--muted); font-size: 1.08rem; margin: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 6px 16px rgba(59, 141, 237, 0.28); }
.btn-primary:hover { background: var(--blue-hover); box-shadow: 0 10px 22px rgba(59, 141, 237, 0.32); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: #fff; }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue-deep); }
.btn-sm { padding: 8px 14px; font-size: 0.85rem; border-radius: 10px; }
.btn .arrow { transition: transform 0.2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.86);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  /* The mark is the "R" of the name, so the text sits flush against it. */
  gap: 2px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; flex: none; border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  color: var(--text-2);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:hover,
.nav-links a[aria-current="true"] { color: var(--blue-deep); background: var(--blue-softer); text-decoration: none; }
.nav-links .nav-cta { margin-left: 10px; color: var(--text); }
.nav-links .nav-cta:hover { background: #fff; color: var(--blue-deep); }
.nav-actions { display: none; align-items: center; gap: 6px; }
.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text-2);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.icon-btn:hover { background: var(--bg-soft); color: var(--text); }
.icon-btn svg { width: 20px; height: 20px; }
.icon-close { display: none; }
.nav-open .icon-close { display: block; }
.nav-open .icon-burger { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  padding: 88px 0 96px;
  overflow: hidden;
  background: linear-gradient(180deg, #f3f8fe 0%, #ffffff 100%);
}
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(40px);
}
.hero::before {
  top: -160px;
  right: -120px;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(59, 141, 237, 0.22) 0%, rgba(59, 141, 237, 0) 65%);
}
.hero::after {
  bottom: -220px;
  left: -160px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(59, 141, 237, 0.12) 0%, rgba(59, 141, 237, 0) 65%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  padding: 7px 14px 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  box-shadow: var(--shadow-sm);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 4px var(--ok-soft);
}
.hero h1 {
  font-size: clamp(2.8rem, 6.5vw, 4.6rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}
.hero-role {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--blue-deep);
  font-size: 1.1rem;
  margin: 0 0 20px;
}
.hero-lead {
  font-size: 1.15rem;
  color: var(--text-2);
  max-width: 560px;
  margin: 0 0 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.hero-social {
  list-style: none;
  display: flex;
  gap: 22px;
  padding: 0;
  margin: 0;
  font-size: 0.9rem;
  font-weight: 500;
}
.hero-social a { color: var(--muted); }
.hero-social a:hover { color: var(--blue-deep); }

.portrait-wrap { margin: 0; display: flex; justify-content: center; }
.portrait {
  position: relative;
  width: min(380px, 100%);
  aspect-ratio: 1 / 1;
}
.portrait::before {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border-radius: 32px;
  background: var(--blue-soft);
  z-index: -1;
}
.portrait::after {
  content: "";
  position: absolute;
  inset: -18px 18px 18px -18px;
  border-radius: 32px;
  border: 1px solid var(--blue-line);
  z-index: -1;
}
.portrait img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 28px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

/* ---------- Sections & cards ---------- */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover { border-color: var(--line-strong); transform: translateY(-3px); box-shadow: var(--shadow); }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 40px;
  align-items: start;
}
.about-text p { margin: 0 0 18px; color: var(--text-2); font-size: 1.05rem; }
.about-text p:last-child { margin-bottom: 0; }
.facts { padding: 26px 28px; }
.facts-title { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; margin: 0 0 18px; }
.facts-list { margin: 0; display: grid; gap: 14px; }
.facts-list div { display: grid; grid-template-columns: 100px 1fr; gap: 12px; align-items: baseline; }
.facts-list dt { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.facts-list dd { margin: 0; font-size: 0.95rem; font-weight: 500; color: var(--text); }

/* ---------- Capabilities ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cap-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--blue-soft);
  color: var(--blue-deep);
  margin-bottom: 18px;
}
.cap-icon svg { width: 22px; height: 22px; }
.cap h3 { font-size: 1.15rem; margin: 0 0 10px; letter-spacing: -0.01em; }
.cap p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* ---------- Experience timeline ---------- */
.timeline {
  --tl-x: 184px;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: var(--tl-x);
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--line);
}
.entry {
  position: relative;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 48px;
  padding: 6px 0 44px;
}
.entry:last-child { padding-bottom: 0; }
.entry::before {
  content: "";
  position: absolute;
  left: calc(var(--tl-x) - 4px);
  top: 16px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 4px var(--blue-ring);
}
.entry-when { font-size: 0.85rem; font-weight: 500; color: var(--muted); padding-top: 8px; }
.entry-when time { color: var(--text-2); }
.entry h3 { font-size: 1.3rem; margin: 0 0 4px; display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: baseline; }
.entry-org { font-family: var(--font-body); font-weight: 600; font-size: 0.95rem; color: var(--blue-deep); letter-spacing: 0; }
.entry-kind { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 0 0 10px; }
.entry p { margin: 0; color: var(--text-2); max-width: 720px; }
.entry.minor h3 { font-size: 1.1rem; }

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 14px 0 0; }
.tags li {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--blue-softer);
  border: 1px solid var(--blue-line);
  color: var(--blue-deep);
}

.entry-more { margin-top: 14px; }
.entry-more summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--blue-deep);
}
.entry-more summary::-webkit-details-marker { display: none; }
.entry-more summary::before { content: "+"; width: 14px; display: inline-block; text-align: center; }
.entry-more[open] summary::before { content: "\2212"; }
.entry-more ul { margin: 12px 0 0; padding-left: 18px; color: var(--text-2); font-size: 0.95rem; max-width: 720px; }
.entry-more li { margin: 6px 0; }

/* ---------- Case studies ---------- */
.case {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  padding: 40px;
  margin-bottom: 24px;
}
.case:last-child { margin-bottom: 0; }
.case-index { font-size: 0.74rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--blue-deep); margin: 0 0 12px; }
.case h3 { font-size: clamp(1.45rem, 2.4vw, 1.9rem); margin: 0 0 14px; line-height: 1.18; }
.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 0.84rem;
  color: var(--muted);
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}
.case-meta b { color: var(--text); font-weight: 600; }
.case p { color: var(--text-2); margin: 0 0 14px; }
.case p:last-of-type { margin-bottom: 0; }
.case-links { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.case-visual {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  align-self: start;
  min-width: 0;
}
.panel-title {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-deep);
  margin: 0 0 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.panel-title span { color: var(--muted); letter-spacing: 0; text-transform: none; font-weight: 500; }
.kv { display: grid; grid-template-columns: 92px 1fr; gap: 8px 14px; font-size: 0.86rem; margin: 0; }
.kv dt { color: var(--muted); font-weight: 500; }
.kv dd { margin: 0; color: var(--text); font-weight: 500; }
.devices { display: flex; gap: 10px; margin: 22px 0 8px; }
.devices svg { width: 26px; height: 42px; color: var(--line-strong); }
.devices svg.hit { color: var(--blue); }
.devices-label { font-size: 0.86rem; color: var(--text-2); margin: 0; }
.devices-label b { color: var(--blue-deep); font-weight: 600; }
.findings { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 8px; }
.findings li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 10px 12px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
}
.findings .map { font-size: 0.76rem; font-weight: 500; color: var(--blue-deep); white-space: nowrap; }

.arch { width: 100%; height: auto; display: block; }
.arch text { font-family: var(--font-body); font-size: 11.5px; font-weight: 600; fill: var(--text); }
.arch .sub { font-size: 9.5px; font-weight: 500; fill: var(--muted); }
.arch .label { font-size: 9px; font-weight: 500; fill: var(--muted); }
.arch .box { fill: #fff; stroke: var(--line-strong); stroke-width: 1; }
.arch .box-accent { fill: var(--blue-soft); stroke: var(--blue); stroke-width: 1; }
.arch .flow { fill: none; stroke: #9fb3c8; stroke-width: 1.4; }
.arch .chip { fill: #fff; stroke: var(--blue-line); }
.arch .chip-text { font-size: 9px; font-weight: 600; fill: var(--blue-deep); }

/* ---------- Projects ---------- */
.projects-status {
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0 0 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sync-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); flex: none; }
.projects-status.is-offline .sync-dot { background: var(--line-strong); }
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.project { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.project.is-new { animation: fadeUp 0.5s ease both; }
.project-cover {
  aspect-ratio: 16 / 9;
  position: relative;
  overflow: hidden;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}
.project-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.project-cover.is-placeholder {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--blue-soft), #ffffff);
}
.cover-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3rem, 6vw, 4.5rem);
  letter-spacing: -0.04em;
  color: var(--blue-deep);
  opacity: 0.85;
}
.cover-lang {
  position: absolute;
  left: 16px;
  bottom: 14px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.project-body { padding: 22px 24px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.project-title { font-size: 1.2rem; margin: 0; }
.project-title a { color: var(--text); }
.project-title a:hover { color: var(--blue-deep); text-decoration: none; }
.project-desc { margin: 0; color: var(--muted); font-size: 0.95rem; }
.project-meta { font-size: 0.78rem; color: var(--muted); margin: 0; }
.project-foot {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.project-lang { display: inline-flex; align-items: center; gap: 8px; font-size: 0.85rem; font-weight: 500; color: var(--text-2); }
.lang-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--lang, var(--muted)); border: 1px solid rgba(15, 27, 45, 0.15); display: inline-block; }
.project-links { display: inline-flex; gap: 14px; }
.project-link { font-weight: 600; font-size: 0.9rem; }
.projects-cta { margin-top: 36px; display: flex; justify-content: center; }

/* ---------- Skills ---------- */
.toolkit { border-top: 1px solid var(--line); }
.tool-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 12px 24px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.tool-key {
  margin: 0;
  padding-top: 7px;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-deep);
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.chip {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 6px 13px;
  font-size: 0.86rem;
  font-weight: 500;
  background: #fff;
  color: var(--text-2);
  transition: border-color 0.2s ease, color 0.2s ease;
}
.chip:hover { border-color: var(--blue); color: var(--blue-deep); }

/* ---------- Education ---------- */
.edu-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.edu-year { font-size: 0.8rem; font-weight: 600; letter-spacing: 0.06em; color: var(--blue-deep); margin: 0; }
.edu h3 { font-size: 1.3rem; margin: 10px 0 4px; }
.edu-org { color: var(--muted); margin: 0 0 14px; }
.edu p { margin: 0 0 14px; color: var(--text-2); font-size: 0.95rem; }
.badge {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 8px;
  background: var(--blue-soft);
  color: var(--blue-deep);
  border: 1px solid var(--blue-line);
}

/* ---------- Contact ---------- */
.section-contact { background: linear-gradient(180deg, #ffffff 0%, var(--blue-softer) 100%); }
.contact-box { text-align: center; max-width: 720px; margin: 0 auto; }
.contact-box .section-head { margin: 0 auto 8px; }
.contact-box .eyebrow { justify-content: center; }
.contact-box .lead { font-size: 1.12rem; }
.contact-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.contact-note { margin: 22px 0 0; font-size: 0.85rem; color: var(--muted); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 34px 0; color: var(--muted); font-size: 0.85rem; background: #fff; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer p { margin: 0; }
.footer-links { display: flex; gap: 18px; font-weight: 500; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--blue-deep); }

/* ---------- Motion ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.js .reveal.in-view { opacity: 1; transform: none; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
}

/* ---------- Responsive ---------- */
@media (min-width: 1600px) {
  :root { --container: 1200px; }
}

@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr 0.85fr; gap: 40px; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .case { padding: 32px; gap: 32px; }
}

@media (max-width: 900px) {
  .nav-actions { display: flex; }
  .nav-links {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    background: rgba(255, 255, 255, 0.96);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .nav-open .nav-links { display: flex; }
  .nav-links a { padding: 12px 10px; font-size: 1rem; }
  .nav-links .nav-cta { margin: 8px 0 0; }
  .hero { padding: 48px 0 72px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .portrait-wrap { order: -1; }
  .portrait { width: min(300px, 70vw); }
  .hero-lead { max-width: 640px; }
  .case { grid-template-columns: 1fr; padding: 28px; }
  .about-grid { grid-template-columns: 1fr; }
  .tool-row { grid-template-columns: 1fr; gap: 10px; padding: 18px 0; }
  .tool-key { padding-top: 0; }
}

@media (max-width: 768px) {
  .container { width: min(var(--container), 100% - 40px); }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 32px; }
  .hero h1 { font-size: clamp(2.5rem, 11vw, 3.6rem); }
  .timeline { --tl-x: 6px; }
  .timeline::before { width: 2px; }
  .entry { grid-template-columns: 1fr; gap: 6px; padding-left: 28px; padding-bottom: 36px; }
  .entry::before { top: 12px; }
  .entry-when { padding-top: 0; }
  .edu-grid { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .container { width: min(var(--container), 100% - 32px); }
  .hero-actions .btn { width: 100%; }
  .portrait { width: min(260px, 72vw); }
  .case { padding: 22px; }
  .case-visual { padding: 16px; }
  .facts-list div { grid-template-columns: 1fr; gap: 2px; }
  .findings li { flex-direction: column; align-items: flex-start; gap: 4px; }
  .findings .map { white-space: normal; }
  .kv { grid-template-columns: 80px 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
}

/* ---------- Print ---------- */
@media print {
  .nav, .hero-actions, .projects-status, .projects-cta, .footer-links, .skip-link { display: none !important; }
  .card, .case-visual { box-shadow: none; }
  .section { padding: 32px 0; }
}