/* ============================================================
   Bernd M. Weiss — Design for Spacecraft Reuse
   Shared Stylesheet · Mobile-First · No External Dependencies
   ============================================================ */

/* ---------- Custom Properties ---------- */
:root {
  /* Palette */
  --space:      #060E1E;
  --navy:       #0B1E3D;
  --blue:       #1A3A6B;
  --accent:     #2563EB;
  --accent-lt:  #3B82F6;
  --teal:       #0EA5E9;
  --green:      #059669;
  --gold:       #D97706;
  --off-white:  #F8FAFF;
  --light:      #EFF6FF;
  --border:     #E2E8F0;
  --text:       #0F172A;
  --muted:      #64748B;
  --white:      #FFFFFF;

  /* Typography */
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
          'Helvetica Neue', Arial, sans-serif;

  /* Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  /* Spacing */
  --max-w: 1140px;
  --section-y: 5rem;
  --section-x: 1.5rem;

  /* Radii */
  --r-sm: 0.375rem;
  --r-md: 0.75rem;
  --r-lg: 1.25rem;
  --r-xl: 2rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.1), 0 4px 8px rgba(0,0,0,.05);
  --shadow-xl: 0 20px 40px rgba(0,0,0,.12);

  /* Transitions */
  --ease: 0.22s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }
input, textarea, select {
  font-family: var(--font);
  font-size: var(--text-base);
}

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--section-x);
}
.section { padding: var(--section-y) var(--section-x); }
.section--light { background: var(--off-white); }
.section--dark  { background: var(--navy); color: var(--white); }
.section--space { background: var(--space); color: var(--white); }

.text-center { text-align: center; }
.text-muted   { color: var(--muted); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .3rem .75rem;
  border-radius: 999px;
}
.badge--teal    { background: rgba(14,165,233,.15); color: var(--teal); }
.badge--green   { background: rgba(5,150,105,.12);  color: var(--green); }
.badge--gold    { background: rgba(215,119,6,.12);  color: var(--gold); }
.badge--white   { background: rgba(255,255,255,.12); color: var(--white); }

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5 { line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(var(--text-3xl), 5vw, var(--text-6xl)); }
h2 { font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl)); }
h3 { font-size: clamp(var(--text-xl), 2vw, var(--text-2xl)); }
h4 { font-size: var(--text-lg); }
p  { max-width: 68ch; }

.eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .5rem;
  display: block;
}
.eyebrow--white { color: var(--teal); }

.section-heading {
  margin-bottom: 1rem;
}
.section-sub {
  font-size: var(--text-lg);
  color: var(--muted);
  margin-bottom: 3rem;
  max-width: 56ch;
}
.section-sub--center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  padding: .75rem 1.75rem;
  border-radius: var(--r-sm);
  transition: all var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: var(--accent);
  color: var(--white);
}
.btn--primary:hover { background: #1D4ED8; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--outline {
  border: 2px solid rgba(255,255,255,.3);
  color: var(--white);
}
.btn--outline:hover { border-color: var(--white); background: rgba(255,255,255,.08); }
.btn--dark {
  background: var(--navy);
  color: var(--white);
}
.btn--dark:hover { background: var(--blue); transform: translateY(-1px); }
.btn--ghost {
  color: var(--accent);
  padding-left: 0;
}
.btn--ghost:hover { gap: .85rem; }
.btn-arrow { font-size: 1.1em; }

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 var(--section-x);
  transition: background var(--ease), box-shadow var(--ease);
}
.nav--scrolled {
  background: rgba(6, 14, 30, 0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,.06);
}
.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -.01em;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.nav__logo-dot {
  width: 8px; height: 8px;
  background: var(--teal);
  border-radius: 50%;
  flex-shrink: 0;
}
.nav__links {
  display: none;
  align-items: center;
  gap: 2rem;
}
.nav__links a {
  color: rgba(255,255,255,.75);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--ease);
}
.nav__links a:hover { color: var(--white); }
.nav__cta { margin-left: 1.5rem; }
.nav__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  display: block;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all .25s ease;
}
.nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  display: none;
  position: fixed;
  inset: 68px 0 0 0;
  background: var(--space);
  padding: 2rem var(--section-x);
  flex-direction: column;
  gap: 1.5rem;
  z-index: 99;
}
.nav__mobile.open { display: flex; }
.nav__mobile a {
  color: rgba(255,255,255,.8);
  font-size: var(--text-lg);
  font-weight: 500;
}
.nav__mobile a:hover { color: var(--white); }

@media (min-width: 768px) {
  .nav__links { display: flex; }
  .nav__burger { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 68px;
  background-image:
    linear-gradient(135deg, rgba(6,14,30,.94) 0%, rgba(11,30,61,.88) 60%, rgba(26,58,107,.82) 100%),
    url('images/Bernd Weiss - Talk.jpg');
  background-size: cover;
  background-position: center;
  color: var(--white);
}
.hero__content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem var(--section-x);
}
.hero__kicker {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1.25rem;
}
.hero__title {
  margin-bottom: 1.5rem;
  font-size: clamp(2rem, 5.5vw, 3.75rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  max-width: 18ch;
}
.hero__title em {
  font-style: normal;
  color: var(--teal);
}
.hero__desc {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: rgba(255,255,255,.72);
  max-width: 52ch;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Page hero (subpages) */
.page-hero {
  padding-top: 68px;
  background-image:
    linear-gradient(135deg, rgba(6,14,30,.93) 0%, rgba(11,30,61,.87) 100%),
    var(--bg-img, url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?w=1600&q=80&fit=crop&auto=format'));
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: calc(68px + 4rem) var(--section-x) 4rem;
}
.page-hero__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.page-hero h1 { margin-bottom: 1rem; letter-spacing: -.02em; }
.page-hero p { font-size: var(--text-xl); color: rgba(255,255,255,.72); max-width: 52ch; }

/* ---------- Countdown ---------- */
.countdown {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.countdown__unit {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--r-md);
  padding: .9rem 1.2rem;
  text-align: center;
  min-width: 72px;
  backdrop-filter: blur(8px);
}
.countdown__num {
  display: block;
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--white);
}
.countdown__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--teal);
  margin-top: .3rem;
}

/* ---------- Defense Banner ---------- */
.defense-banner {
  background: linear-gradient(135deg, var(--space) 0%, var(--navy) 100%);
  color: var(--white);
  padding: 5rem var(--section-x);
}
.defense-banner__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  gap: 3rem;
}
.defense-meta {
  display: flex;
  flex-direction: column;
  gap: .6rem;
}
.defense-meta-item {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  font-size: var(--text-sm);
  color: rgba(255,255,255,.7);
}
.defense-meta-item strong {
  color: var(--white);
  font-weight: 600;
}
.defense-meta-icon {
  width: 18px; height: 18px;
  flex-shrink: 0;
  margin-top: .1rem;
  color: var(--teal);
}

/* ---------- Signup Form ---------- */
.signup-form {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--r-lg);
  padding: 2rem;
}
.signup-form h3 { color: var(--white); margin-bottom: 1.5rem; font-size: var(--text-xl); }
.form-group { margin-bottom: 1rem; }
.form-row { display: grid; gap: 1rem; }
.form-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: rgba(255,255,255,.6);
  margin-bottom: .35rem;
}
.form-input {
  width: 100%;
  padding: .7rem 1rem;
  background: rgba(255,255,255,.06);
  border: 1.5px solid rgba(255,255,255,.12);
  border-radius: var(--r-sm);
  color: var(--white);
  font-size: var(--text-sm);
  transition: border-color var(--ease), background var(--ease);
  outline: none;
}
.form-input::placeholder { color: rgba(255,255,255,.3); }
.form-input:focus {
  border-color: var(--teal);
  background: rgba(255,255,255,.1);
}
.form-check {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  font-size: var(--text-sm);
  color: rgba(255,255,255,.65);
  cursor: pointer;
  margin-top: .25rem;
}
.form-check input { margin-top: .15rem; accent-color: var(--teal); }
.form-honey { display: none !important; visibility: hidden !important; position: absolute !important; left: -9999px; }
.form-error {
  display: block;
  font-size: .78rem;
  color: #F87171;
  margin-top: .25rem;
  min-height: 1em;
}
.form-input--error {
  border-color: #F87171 !important;
  box-shadow: 0 0 0 2px rgba(248,113,113,.25);
}
.form-input--error:focus {
  border-color: #F87171 !important;
  box-shadow: 0 0 0 3px rgba(248,113,113,.3);
}
.form-error-banner {
  background: rgba(239,68,68,.15);
  border: 1px solid rgba(239,68,68,.4);
  border-radius: var(--r-sm);
  color: #FCA5A5;
  font-size: var(--text-sm);
  padding: .65rem 1rem;
  margin-bottom: .75rem;
  line-height: 1.5;
}
.form-submit {
  width: 100%;
  background: var(--accent);
  color: var(--white);
  font-size: var(--text-sm);
  font-weight: 700;
  padding: .9rem 1.5rem;
  border-radius: var(--r-sm);
  transition: all var(--ease);
  margin-top: 1rem;
  border: none;
  cursor: pointer;
}
.form-submit:hover { background: #1D4ED8; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.form-success {
  display: none;
  text-align: center;
  padding: 2rem 1rem;
}
.form-success__icon { font-size: 2.5rem; margin-bottom: .75rem; }
.form-success h4 { color: var(--white); font-size: var(--text-xl); margin-bottom: .5rem; }
.form-success p { color: rgba(255,255,255,.65); font-size: var(--text-sm); margin: 0 auto; }
.form-note {
  font-size: var(--text-xs);
  color: rgba(255,255,255,.4);
  margin-top: .75rem;
  text-align: center;
}

/* ---------- Contact Forms (enquire / lab) ---------- */
.contact-form-wrap {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}
.contact-success {
  text-align: center;
  padding: 2rem 1rem;
}
.contact-success--dark { background: transparent; }
.contact-success__icon {
  width: 52px; height: 52px;
  background: var(--teal);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  margin: 0 auto 1rem;
  font-weight: 700;
}
.contact-success h4 { font-size: var(--text-xl); margin-bottom: .5rem; color: var(--text); }
.contact-success p  { color: var(--muted); font-size: var(--text-sm); }
.cf-row {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 540px) { .cf-row { grid-template-columns: 1fr; } }
.cf-group { display: flex; flex-direction: column; margin-bottom: 1rem; }
.cf-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  margin-bottom: .35rem;
}
.cf-label--dark { color: rgba(255,255,255,.85); }
.cf-optional { font-weight: 400; opacity: .6; }
.cf-input {
  padding: .65rem .9rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: var(--text-sm);
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  transition: border-color .2s, box-shadow .2s;
  width: 100%;
  box-sizing: border-box;
}
.cf-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,.18);
}
.cf-input--dark {
  background: rgba(255,255,255,.07);
  border-color: rgba(255,255,255,.15);
  color: rgba(255,255,255,.9);
}
.cf-input--dark::placeholder { color: rgba(255,255,255,.35); }
.cf-input--dark:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(20,184,166,.2);
}
.cf-select { appearance: none; cursor: pointer; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236B7280'%3E%3Cpath fill-rule='evenodd' d='M5.23 7.21a.75.75 0 011.06.02L10 11.168l3.71-3.938a.75.75 0 111.08 1.04l-4.25 4.5a.75.75 0 01-1.08 0l-4.25-4.5a.75.75 0 01.02-1.06z' clip-rule='evenodd'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .7rem center; background-size: 1.1rem; padding-right: 2.2rem; }
.cf-textarea { resize: vertical; min-height: 110px; line-height: 1.55; }
.cf-error {
  display: block;
  font-size: .78rem;
  color: #F87171;
  margin-top: .25rem;
  min-height: 1em;
}
.cf-input.cf-input--error,
.cf-input--dark.cf-input--error {
  border-color: #F87171 !important;
  box-shadow: 0 0 0 2px rgba(248,113,113,.25) !important;
}
.cf-submit {
  margin-top: .25rem;
}
.cf-note {
  font-size: var(--text-xs);
  color: var(--muted);
  margin-top: .6rem;
}

/* ---------- Research Section ---------- */
.research-problem {
  background: var(--light);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: 1.5rem 2rem;
  margin-bottom: 2.5rem;
}
.research-problem p { color: var(--text); font-size: var(--text-base); max-width: 100%; }

.research-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.research-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.5rem;
  transition: box-shadow var(--ease), transform var(--ease);
}
.research-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.research-card__num {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .5rem;
}
.research-card h4 { margin-bottom: .5rem; font-size: var(--text-base); }
.research-card p { font-size: var(--text-sm); color: var(--muted); max-width: 100%; }

.stat-grid {
  display: grid;
  gap: 1.5rem;
  margin: 3rem 0;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: .25rem;
}
.stat-label {
  font-size: var(--text-sm);
  color: var(--muted);
  max-width: 16ch;
  margin: 0 auto;
}

/* ---------- Expertise Cards ---------- */
.expertise-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 3rem;
}
.expertise-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.75rem;
  transition: all var(--ease);
  position: relative;
  overflow: hidden;
}
.expertise-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--teal) 100%);
  opacity: 0;
  transition: opacity var(--ease);
}
.expertise-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.expertise-card:hover::before { opacity: 1; }
.expertise-icon {
  width: 44px; height: 44px;
  background: var(--light);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.4rem;
}
.expertise-card h4 { margin-bottom: .5rem; font-size: var(--text-base); }
.expertise-card p { font-size: var(--text-sm); color: var(--muted); max-width: 100%; }

/* ---------- Lab Section (Homepage Preview) ---------- */
.lab-preview {
  background: linear-gradient(135deg, var(--space) 0%, var(--blue) 100%);
  color: var(--white);
  padding: var(--section-y) var(--section-x);
}
.lab-preview__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  gap: 3rem;
}
.lab-preview h2 { color: var(--white); margin-bottom: 1rem; }
.lab-preview p { color: rgba(255,255,255,.7); max-width: 52ch; }

.lab-pillars {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}
.lab-pillar {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--r-md);
}
.lab-pillar__icon { font-size: 1.4rem; flex-shrink: 0; margin-top: .1rem; }
.lab-pillar h4 { font-size: var(--text-sm); font-weight: 700; color: var(--white); margin-bottom: .2rem; }
.lab-pillar p { font-size: var(--text-sm); color: rgba(255,255,255,.6); max-width: 100%; }

/* ---------- About Snapshot ---------- */
.about-snap {
  background: var(--off-white);
  padding: var(--section-y) var(--section-x);
}
.about-snap__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  gap: 3rem;
  align-items: center;
}
.about-snap__img {
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--light);
}
.about-snap__img img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* ---------- Papers / Publications ---------- */
.papers-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}
.paper-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: box-shadow var(--ease);
}
.paper-card:hover { box-shadow: var(--shadow-md); }
.paper-card__label {
  flex-shrink: 0;
  width: 48px; height: 48px;
  background: var(--light);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 800;
  color: var(--accent);
}
.paper-card h4 { font-size: var(--text-sm); font-weight: 600; margin-bottom: .25rem; }
.paper-card p { font-size: var(--text-xs); color: var(--muted); max-width: 100%; }

/* ---------- Timeline (About) ---------- */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: .5rem; bottom: .5rem;
  width: 2px;
  background: var(--border);
}
.timeline-item { position: relative; margin-bottom: 2rem; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.375rem; top: .4rem;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent);
}
.timeline-item__date {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .2rem;
}
.timeline-item h4 { font-size: var(--text-base); margin-bottom: .15rem; }
.timeline-item p { font-size: var(--text-sm); color: var(--muted); max-width: 100%; }

/* ---------- Footer ---------- */
.footer {
  background: var(--space);
  color: rgba(255,255,255,.6);
  padding: 3.5rem var(--section-x) 2rem;
}
.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  gap: 2.5rem;
}
.footer__brand { color: var(--white); font-size: var(--text-base); font-weight: 700; margin-bottom: .5rem; }
.footer__tagline { font-size: var(--text-sm); color: rgba(255,255,255,.4); }
.footer__links h5 {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.4);
  margin-bottom: .75rem;
}
.footer__links ul { display: flex; flex-direction: column; gap: .4rem; }
.footer__links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.55);
  transition: color var(--ease);
}
.footer__links a:hover { color: var(--white); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.07);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  font-size: var(--text-xs);
}
.footer__bottom a { color: rgba(255,255,255,.4); }
.footer__bottom a:hover { color: rgba(255,255,255,.7); }

/* ---------- Legal Pages ---------- */
.legal-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 5rem var(--section-x);
}
.legal-content h1 { margin-bottom: 2rem; font-size: var(--text-3xl); }
.legal-content h2 { font-size: var(--text-xl); margin-top: 2.5rem; margin-bottom: .75rem; }
.legal-content p { margin-bottom: 1rem; font-size: var(--text-base); color: var(--muted); max-width: 100%; }
.legal-content a { color: var(--accent); }
.legal-content a:hover { text-decoration: underline; }

/* ---------- Responsive Grid Breakpoints ---------- */
@media (min-width: 600px) {
  .form-row { grid-template-columns: 1fr 1fr; }
  .stat-grid  { grid-template-columns: repeat(2, 1fr); }
  .research-grid  { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .defense-banner__inner  { grid-template-columns: 1fr 1fr; align-items: start; }
  .lab-preview__inner     { grid-template-columns: 1fr 1fr; align-items: center; }
  .lab-pillars            { grid-template-columns: 1fr 1fr; }
  .about-snap__inner      { grid-template-columns: 1fr 1fr; }
  .papers-grid            { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .expertise-grid   { grid-template-columns: repeat(3, 1fr); }
  .research-grid    { grid-template-columns: repeat(3, 1fr); }
  .stat-grid        { grid-template-columns: repeat(4, 1fr); }
  .footer__inner    { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

/* ---------- Scroll Animation ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s ease, transform .55s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---------- Misc UI ---------- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}
.tag-cloud { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }
.tag {
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--light);
  color: var(--blue);
  padding: .25rem .7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}