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

:root {
  --bg: #070a0f;
  --bg2: #0b1118;
  --surface: #101923;
  --surface2: #152232;
  --line: rgba(232, 237, 243, 0.09);
  --line2: rgba(232, 237, 243, 0.16);
  --accent: #00e5a0;
  --accent2: #4d8dff;
  --accent3: #ff4d6d;
  --text: #eef4fb;
  --muted: #98a6b7;
  --muted2: #667385;
  --mono: 'IBM Plex Mono', monospace;
  --display: 'Space Grotesk', sans-serif;
  --body: 'DM Sans', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  max-width: 100%;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 14% 16%, rgba(0, 229, 160, 0.11), transparent 28rem),
    radial-gradient(circle at 86% 10%, rgba(77, 141, 255, 0.10), transparent 30rem),
    linear-gradient(180deg, #070a0f 0%, #091018 42%, #070a0f 100%);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.45;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.055'/%3E%3C/svg%3E");
}

a, button { -webkit-tap-highlight-color: transparent; }

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 3rem;
  background: rgba(7, 10, 15, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.nav-brand {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.nav-links { display: flex; align-items: center; gap: 2rem; list-style: none; }

.nav-links a {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); }

.nav-cta {
  padding: 7px 14px;
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--accent) !important;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.nav-cta:hover { background: var(--accent); color: var(--bg) !important; }

.nav-hamburger {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  border: 0;
  background: none;
  cursor: pointer;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--muted);
  transition: transform 0.25s, opacity 0.25s;
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 99;
  display: none;
  flex-direction: column;
  padding: 0.75rem 1.5rem 1.25rem;
  background: rgba(7, 10, 15, 0.97);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(18px);
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
  display: flex;
  min-height: 48px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
}

.mobile-menu a:last-child { border-bottom: 0; }
.mobile-menu a:hover { color: var(--accent); }

.container {
  position: relative;
  z-index: 1;
  width: min(100%, 1160px);
  margin: 0 auto;
  padding: 0 3rem;
}

.page-header {
  position: relative;
  z-index: 1;
  padding: 8.5rem 0 4.5rem;
  border-bottom: 1px solid var(--line);
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(0, 229, 160, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77, 141, 255, 0.022) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 100%);
}

.breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb span { color: var(--muted2); }

.page-title-area {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.kicker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.kicker::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--accent);
}

h1 {
  margin-bottom: 1.1rem;
  color: var(--text);
  font-family: var(--display);
  font-size: clamp(3.15rem, 8vw, 6.3rem);
  font-weight: 800;
  letter-spacing: 0;
  line-height: 0.9;
}

.page-lead {
  max-width: 700px;
  color: var(--muted);
  font-size: 1.08rem;
  font-weight: 300;
  line-height: 1.75;
}

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

.filter-bar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  padding: 1.6rem 0;
}

.filter-btn {
  min-height: 40px;
  padding: 0 1rem;
  border: 1px solid var(--line2);
  border-radius: 999px;
  background: rgba(16, 25, 35, 0.7);
  color: var(--muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: rgba(0, 229, 160, 0.55);
  background: rgba(0, 229, 160, 0.09);
  color: var(--accent);
}

.filter-count {
  margin-left: auto;
  color: var(--muted2);
  font-family: var(--mono);
  font-size: 10px;
}

.archive-body {
  position: relative;
  z-index: 1;
  padding: 1rem 0 6rem;
}

.archive-section { margin-bottom: 4.5rem; }

.archive-section-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.35rem;
  color: var(--text);
  font-family: var(--display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.1;
}

.archive-section-label::before {
  content: '';
  width: 38px;
  height: 2px;
  background: var(--accent);
  flex-shrink: 0;
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(285px, 1fr));
  gap: 1.1rem;
}

.archive-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 292px;
  flex-direction: column;
  overflow: hidden;
  padding: 1.55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015)),
    rgba(16, 25, 35, 0.82);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}

.archive-card::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--accent);
  opacity: 0.75;
}

.archive-card::after {
  content: '';
  position: absolute;
  right: -4rem;
  top: -4rem;
  width: 12rem;
  height: 12rem;
  border: 1px solid rgba(0, 229, 160, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.archive-card:hover {
  border-color: rgba(0, 229, 160, 0.32);
  background:
    linear-gradient(135deg, rgba(0, 229, 160, 0.075), rgba(255, 255, 255, 0.018)),
    rgba(18, 29, 42, 0.9);
  transform: translateY(-3px);
}

.archive-card.internship {
  border-color: rgba(255, 77, 109, 0.24);
  background:
    linear-gradient(135deg, rgba(255, 77, 109, 0.10), rgba(255, 255, 255, 0.014)),
    rgba(16, 25, 35, 0.82);
}

.archive-card.internship::before { background: var(--accent3); }
.archive-card.internship:hover { border-color: rgba(255, 77, 109, 0.44); }

.card-num {
  margin-bottom: 1.35rem;
  color: var(--muted2);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.card-title {
  margin-bottom: 0.65rem;
  color: var(--text);
  font-family: var(--display);
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  font-weight: 700;
  line-height: 1.12;
}

.card-desc {
  flex: 1;
  margin-bottom: 1.35rem;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 300;
  line-height: 1.72;
  overflow-wrap: anywhere;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.3rem;
}

.tag {
  max-width: 100%;
  padding: 4px 9px;
  border: 1px solid var(--line2);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  line-height: 1.3;
  overflow-wrap: anywhere;
  text-transform: uppercase;
}

.tag.green { border-color: rgba(0, 229, 160, 0.35); color: var(--accent); }
.tag.red { border-color: rgba(255, 77, 109, 0.35); color: var(--accent3); }
.tag.blue { border-color: rgba(77, 141, 255, 0.35); color: #75a8ff; }

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.card-link::after { content: '→'; transition: transform 0.2s; }
.archive-card:hover .card-link::after { transform: translateX(4px); }

footer {
  position: relative;
  z-index: 1;
  padding: 3rem 0;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.footer-brand,
.footer-copy {
  color: var(--muted2);
  font-family: var(--mono);
  font-size: 10px;
}

.footer-brand { color: var(--muted); font-size: 12px; }

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
}

.footer-links a {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--text); }

.projects-inline-001 { color: var(--accent3); }

@media (max-width: 1024px) {
  nav { padding: 0 2rem; }
  .container { padding: 0 2rem; }
}

@media (max-width: 768px) {
  nav { padding: 0 1.5rem; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .container { padding: 0 1.5rem; }
  .page-header { padding: 7rem 0 3rem; }
  .kicker { align-items: flex-start; line-height: 1.5; }
  h1 { font-size: clamp(2.7rem, 13vw, 4.15rem); line-height: 0.95; }
  .page-lead { font-size: 1rem; line-height: 1.7; }
  .filter-bar { align-items: stretch; gap: 0.6rem; }
  .filter-btn { flex: 1 1 calc(50% - 0.6rem); }
  .filter-count { flex-basis: 100%; margin-left: 0; padding-top: 0.25rem; }
  .archive-body { padding-bottom: 4.5rem; }
  .archive-section { margin-bottom: 3.25rem; }
  .archive-grid { grid-template-columns: 1fr; }
  .archive-card { min-height: 0; padding: 1.35rem; }
  .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
  .footer-links { gap: 0.9rem 1.25rem; }
}

@media (max-width: 520px) {
  nav { padding: 0 1rem; }
  .nav-brand { font-size: 12px; }
  .container { padding: 0 1rem; }
  .page-header { padding: 6.5rem 0 2.5rem; }
  .filter-btn { flex-basis: 100%; }
  .archive-section-label { font-size: 1.28rem; }
  .archive-section-label::before { width: 28px; }
  .footer-links { flex-direction: column; align-items: center; }
}

/* Field-file visual system */
:root {
  --bg: #05080d;
  --bg2: #0a1018;
  --surface: #111925;
  --surface2: #162131;
  --line: rgba(255,255,255,0.1);
  --line2: rgba(255,255,255,0.18);
  --accent: #00f0c8;
  --accent2: #57a4ff;
  --accent3: #ff4d6d;
  --text: #edf4ff;
  --muted: #8a9aaf;
  --muted2: #5f7188;
}

body {
  padding-left: 72px;
  background:
    radial-gradient(circle at 16% 12%, rgba(0,240,200,0.12), transparent 24rem),
    radial-gradient(circle at 88% 18%, rgba(87,164,255,0.12), transparent 26rem),
    var(--bg);
}

body::before {
  opacity: 1;
  background:
    linear-gradient(120deg, transparent 0 54%, rgba(0,240,200,0.055) 54% 55%, transparent 55%),
    radial-gradient(circle at 50% 120%, rgba(255,77,109,0.08), transparent 28rem);
}

nav {
  position: fixed;
  inset: 0 auto 0 0;
  width: 72px;
  height: auto;
  min-height: 100vh;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 1.2rem;
  padding: 1rem 0.75rem;
  background: rgba(5,8,13,0.94);
  border-right: 1px solid var(--line);
  border-bottom: 0;
}

.nav-brand,
.nav-links a,
.nav-cta {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  white-space: nowrap;
}

.nav-brand { color: var(--accent); }
.nav-links { flex-direction: column; gap: 1.2rem; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-cta { border: 0; padding: 0; color: var(--muted) !important; }
.nav-cta:hover { background: transparent; color: var(--accent) !important; }

.page-header {
  padding: 7rem 0 4rem;
  border-bottom: 1px solid var(--line);
}

.page-header::before {
  background:
    linear-gradient(120deg, transparent 0 54%, rgba(0,240,200,0.055) 54% 55%, transparent 55%),
    radial-gradient(circle at 90% 20%, rgba(87,164,255,0.12), transparent 24rem);
  background-size: auto;
  mask-image: none;
}

h1 {
  text-transform: uppercase;
  font-size: clamp(3.8rem, 10vw, 8rem);
  line-height: 0.78;
}

.kicker,
.breadcrumb a,
.filter-btn.active,
.filter-btn:hover,
.archive-section-label::before,
.card-link { color: var(--accent); }

.filter-btn,
.archive-card {
  border-radius: 0;
  background: rgba(17,25,37,0.88);
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.filter-btn {
  min-height: 42px;
  border-color: var(--line);
}

.filter-btn.active,
.filter-btn:hover {
  border-color: rgba(0,240,200,0.55);
  background: rgba(0,240,200,0.08);
}

.archive-section-label {
  text-transform: none;
  font-size: clamp(2rem, 5vw, 4.6rem);
  line-height: 0.92;
}

.archive-card {
  min-height: 260px;
  border-color: var(--line);
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
}

.archive-card::before { width: 0; }
.archive-card::after { display: none; }
.archive-card:hover {
  border-color: var(--accent);
  background: var(--surface2);
  transform: translateY(-3px);
}

.archive-card.internship {
  background: linear-gradient(135deg, rgba(0,240,200,0.12), rgba(17,25,37,0.96) 42%);
  border-color: rgba(0,240,200,0.3);
}

.card-title {
  font-size: clamp(1.45rem, 3vw, 2.55rem);
  line-height: 0.95;
}

.tag {
  border-radius: 0;
  border-color: rgba(0,240,200,0.32);
  color: var(--accent);
}

footer { border-top: 1px solid var(--line); }

@media (max-width: 980px) {
  body { padding-left: 0; }
  nav {
    position: sticky;
    top: 0;
    width: auto;
    min-height: auto;
    height: 64px;
    flex-direction: row;
    justify-content: space-between;
    padding: 0 1rem;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-brand,
  .nav-links a,
  .nav-cta {
    writing-mode: horizontal-tb;
    transform: none;
  }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .mobile-menu {
    top: 64px;
    background: rgba(5,8,13,0.97);
  }
}

@media (max-width: 620px) {
  h1 { font-size: clamp(3.2rem, 19vw, 5.6rem); }
  .archive-section-label { font-size: clamp(2rem, 12vw, 3.4rem); }
}

.archive-dossier {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2rem;
  border: 1px solid var(--line);
  background: var(--line);
  max-width: 900px;
}

.archive-dossier div {
  min-width: 0;
  padding: 1rem;
  background: rgba(17,25,37,0.88);
}

.archive-dossier span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--muted2);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.archive-dossier strong {
  display: block;
  color: var(--text);
  font-family: var(--display);
  font-size: 1.08rem;
  line-height: 1.1;
}

.archive-section {
  display: grid;
  grid-template-columns: minmax(180px, 0.38fr) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.archive-section-label {
  position: sticky;
  top: 1rem;
  display: block;
}

.archive-section-label::before {
  display: block;
  margin-bottom: 1rem;
}

.archive-grid { width: 100%; }

.archive-card {
  padding: 1.4rem;
}

.archive-card .card-num {
  display: inline-flex;
  width: fit-content;
  padding: 0.3rem 0.5rem;
  border: 1px solid rgba(87,164,255,0.34);
  color: var(--accent2);
}

@media (max-width: 980px) {
  .archive-dossier { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .archive-section {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .archive-section-label { position: static; }
}

@media (max-width: 620px) {
  .archive-dossier { grid-template-columns: 1fr; }
}

/* Archive board rework */
.page-header {
  min-height: 72vh;
  display: flex;
  align-items: stretch;
  padding: 0;
}

.page-header .container {
  display: grid;
  align-content: center;
  width: min(1180px, calc(100% - 4rem));
  padding: 5rem 0 4rem;
}

.page-header .container::before {
  content: 'DVW.SEC / PROJECT INDEX';
  display: flex;
  min-height: 72px;
  align-items: center;
  margin: -5rem 0 4rem;
  padding: 0 2rem;
  border: 1px solid var(--line);
  background: rgba(5,8,13,0.62);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  backdrop-filter: blur(14px);
}

.page-title-area {
  max-width: none;
}

.kicker {
  display: inline-flex;
  width: fit-content;
  padding: 0.45rem 0.7rem;
  border: 1px solid rgba(0,240,200,0.42);
  background: rgba(0,240,200,0.08);
  font-size: 11px;
  font-weight: 600;
}

.kicker::before {
  display: none;
}

h1 {
  max-width: 980px;
  margin: 1.5rem 0;
  font-size: clamp(4.1rem, 11vw, 9rem);
}

.page-lead {
  max-width: 780px;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.55;
}

.archive-dossier {
  max-width: none;
  margin-top: 2.4rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.archive-dossier div {
  padding: 1.25rem;
}

.archive-dossier strong {
  font-size: 1.2rem;
}

.archive-brief {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1px;
  max-width: 960px;
  margin-top: 1rem;
  border: 1px solid var(--line);
  background: var(--line);
}

.archive-brief div {
  min-width: 0;
  padding: 1rem 1.25rem;
  background: rgba(5,8,13,0.76);
}

.archive-brief span,
.archive-section-label span {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--accent2);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.archive-brief strong {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.65;
}

.filter-bar {
  position: sticky;
  top: 1rem;
  z-index: 5;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  background: rgba(5,8,13,0.88);
  backdrop-filter: blur(16px);
}

.filter-btn {
  min-height: 38px;
  padding: 0 0.9rem;
  box-shadow: none;
}

.archive-body {
  padding: 4rem 0 6rem;
}

.archive-body > .container,
footer .container {
  width: min(1180px, calc(100% - 4rem));
  padding: 0;
}

.archive-section {
  position: relative;
  grid-template-columns: minmax(220px, 0.34fr) minmax(0, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.archive-section:last-child {
  border-bottom: 0;
}

.archive-section-label {
  top: 1rem;
  margin: 0;
  padding: 1.2rem;
  border: 1px solid var(--line);
  background: rgba(17,25,37,0.72);
  box-shadow: -8px 8px 0 rgba(87,164,255,0.10);
}

.archive-section-label::before {
  display: none;
}

.archive-section-label strong {
  display: block;
  color: var(--text);
  font-family: var(--display);
  font-size: clamp(1.65rem, 3vw, 2.65rem);
  line-height: 0.95;
}

.archive-section-label small {
  display: block;
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 300;
  line-height: 1.6;
}

.archive-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.archive-section[data-section="research"] .archive-grid,
.archive-section[data-section="blue"] .archive-grid,
.archive-section[data-section="lab"] .archive-grid {
  grid-template-columns: 1fr;
}

.archive-card {
  min-height: 300px;
  padding: 1.25rem;
  border: 1px solid var(--line);
  background: rgba(17,25,37,0.88);
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.archive-card.internship {
  min-height: 340px;
  background: linear-gradient(135deg, rgba(0,240,200,0.12), rgba(17,25,37,0.96) 42%);
}

.archive-card::before {
  content: 'CASE';
  position: absolute;
  inset: auto -1px -1px auto;
  width: auto;
  padding: 0.35rem 0.55rem;
  background: var(--accent);
  color: var(--bg);
  opacity: 1;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.archive-card.internship::before {
  background: var(--accent);
}

.archive-card .card-num {
  margin-bottom: 1.1rem;
  border-color: rgba(87,164,255,0.34);
  color: var(--accent2);
}

.card-title {
  max-width: 520px;
  margin-bottom: 0.85rem;
  font-size: clamp(1.65rem, 3.2vw, 3rem);
}

.card-desc {
  max-width: 640px;
  font-size: 0.98rem;
  line-height: 1.7;
}

.card-tags {
  margin-bottom: 1.6rem;
}

.card-link {
  width: fit-content;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

@media (max-width: 980px) {
  .page-header {
    min-height: auto;
  }

  .page-header .container,
  .archive-body > .container,
  footer .container {
    width: min(100% - 2rem, 780px);
  }

  .page-header .container {
    padding: 2rem 0 4rem;
  }

  .page-header .container::before {
    min-height: 64px;
    margin: -2rem 0 3rem;
    padding: 0 1rem;
  }

  .filter-bar {
    position: relative;
    top: auto;
  }

  .archive-section {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .archive-section-label {
    position: static;
  }
}

@media (max-width: 760px) {
  .archive-brief,
  .archive-grid,
  .archive-section[data-section="research"] .archive-grid,
  .archive-section[data-section="blue"] .archive-grid,
  .archive-section[data-section="lab"] .archive-grid {
    grid-template-columns: 1fr;
  }

  .filter-btn {
    flex: 1 1 calc(50% - 0.6rem);
  }
}

@media (max-width: 620px) {
  h1 {
    font-size: clamp(3.2rem, 20vw, 6rem);
  }

  .page-lead {
    font-size: 1rem;
  }

  .archive-card,
  .archive-card.internship {
    min-height: 0;
  }
}