/* ============================================================
   MATELEC – Stylesheet
   Universidad Autónoma de Madrid
   ============================================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-dark:   #002f6c;
  --blue:        #0057b8;
  --blue-light:  #0083ca;
  --blue-pale:   #e8f2ff;
  --accent:      #e05a1e;
  --accent-lt:   #f7e8e0;
  --text:        #1a2233;
  --text-muted:  #5a6475;
  --bg:          #ffffff;
  --bg-alt:      #f4f7fb;
  --border:      #dde4ef;
  --radius:      12px;
  --radius-lg:   20px;
  --shadow-sm:   0 2px 8px rgba(0,47,108,.08);
  --shadow:      0 8px 30px rgba(0,47,108,.12);
  --shadow-lg:   0 20px 60px rgba(0,47,108,.16);
  --transition:  0.25s ease;
  --font:        'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--blue-light); }

ul { list-style: none; }

img { max-width: 100%; display: block; }

address { font-style: normal; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover {
  background: var(--blue-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,.15);
  color: #fff;
  border-color: #fff;
}

.btn-secondary {
  background: var(--bg-alt);
  color: var(--blue);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--blue-pale);
  border-color: var(--blue-light);
  color: var(--blue-dark);
}

.btn-sm {
  padding: 8px 18px;
  font-size: .85rem;
  background: var(--blue-pale);
  color: var(--blue);
  border-color: transparent;
}
.btn-sm:hover {
  background: var(--blue);
  color: #fff;
}

/* ---------- Header ---------- */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

#header.scrolled { box-shadow: var(--shadow); }

.nav-container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  flex-shrink: 0;
}
.logo:hover { color: var(--text); }

.logo-mark {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.logo-img {
  width: 40px; height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.footer-logo-img {
  filter: brightness(0) invert(1);
  opacity: .85;
}

.logo-name {
  display: block;
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.1;
  color: var(--blue-dark);
}
.logo-sub {
  display: block;
  font-size: .68rem;
  color: var(--text-muted);
  line-height: 1.2;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-links a {
  color: var(--text);
  font-size: .88rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  background: var(--blue-pale);
  color: var(--blue);
}

/* Nav dropdown */
.nav-dropdown {
  position: relative;
}
.nav-arrow {
  font-size: .7em;
  margin-left: 2px;
  transition: transform var(--transition);
}
.nav-dropdown:hover .nav-arrow {
  transform: rotate(180deg);
}
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 8px 0;
  min-width: 220px;
  z-index: 1000;
}
.nav-dropdown:hover .nav-dropdown-menu {
  display: block;
}
.nav-dropdown-menu li {
  display: block;
}
.nav-dropdown-menu a {
  display: block;
  padding: 8px 18px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--text);
  border-radius: 0;
  white-space: nowrap;
}
.nav-dropdown-menu a:hover {
  background: var(--blue-pale);
  color: var(--blue);
}

.lang-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: .82rem;
  cursor: pointer;
  color: var(--text-muted);
  transition: all var(--transition);
  flex-shrink: 0;
}
.lang-toggle:hover { border-color: var(--blue); }
.lang-opt { cursor: pointer; transition: color var(--transition); }
.lang-opt.active { color: var(--blue); font-weight: 700; }
.lang-sep { color: var(--border); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 68px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, var(--blue-dark) 0%, #004494 40%, var(--blue-light) 100%);
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 70% 50%, rgba(0,131,202,.4) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1160px;
  margin: 0 auto;
  padding: 80px 24px;
  color: #fff;
}

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.3);
  color: rgba(255,255,255,.9);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  margin-bottom: 24px;
  background: linear-gradient(to bottom right, #fff 60%, rgba(255,255,255,.6));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: rgba(255,255,255,.8);
  max-width: 620px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.stat-label {
  font-size: .82rem;
  color: rgba(255,255,255,.65);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero-scroll span {
  display: block;
  width: 24px; height: 38px;
  border: 2px solid rgba(255,255,255,.4);
  border-radius: 12px;
  position: relative;
}

.hero-scroll span::before {
  content: '';
  position: absolute;
  top: 6px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 8px;
  background: rgba(255,255,255,.7);
  border-radius: 2px;
  animation: scrollDot 2s ease infinite;
}

@keyframes scrollDot {
  0%   { opacity: 1; top: 6px; }
  100% { opacity: 0; top: 20px; }
}

/* ---------- Sections ---------- */
.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-pale);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto;
  line-height: 1.7;
}
.section-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto;
  line-height: 1.7;
}
.section-intro p { margin: 0 0 .5em; }
.section-intro a { color: var(--blue-light); text-decoration: underline; }
.section-intro ul, .section-intro ol { padding-left: 1.5em; margin: .5em 0; }

.section-note {
  margin-top: 32px;
  font-size: .84rem;
  color: var(--text-muted);
  text-align: center;
}

/* ---------- Research Cards ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-light);
}

.card-research .card-icon {
  font-size: 2.2rem;
  margin-bottom: 20px;
}

.card-research h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.3;
}

.card-research p {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 16px;
}

.card-research ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card-research ul li {
  font-size: .84rem;
  color: var(--blue);
  padding-left: 16px;
  position: relative;
}
.card-research ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--blue-light);
}

/* ---------- Members ---------- */
.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.member-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

.member-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--blue-light);
  transform: translateY(-2px);
}

.member-avatar {
  width: 60px; height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.member-info h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.member-role {
  display: inline-block;
  font-size: .76rem;
  font-weight: 600;
  color: var(--blue);
  background: var(--blue-pale);
  padding: 2px 10px;
  border-radius: 100px;
  margin-bottom: 6px;
}

.member-dept {
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.member-link {
  font-size: .8rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.member-link:hover { color: var(--blue); }

.members-note {
  text-align: center;
  font-size: .9rem;
  color: var(--text-muted);
  padding: 24px;
  background: var(--blue-pale);
  border-radius: var(--radius);
}

/* ---------- Projects ---------- */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.project-item {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.project-item:last-child { border-bottom: none; }
.project-item:hover { background: var(--blue-pale); }

.project-year {
  flex-shrink: 0;
  width: 110px;
  padding: 28px 24px;
  font-size: .82rem;
  font-weight: 700;
  color: var(--blue);
  border-right: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
}

.project-body {
  padding: 24px 28px;
  flex: 1;
}

.project-badge {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-lt);
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 8px;
}

.project-body h3 {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}

.project-ref {
  font-size: .8rem;
  color: var(--text-muted);
}

/* ---------- Publications ---------- */
.pubs-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 40px;
}

.pub-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.pub-item:last-child { border-bottom: none; }

.pub-year {
  flex-shrink: 0;
  font-size: .82rem;
  font-weight: 700;
  color: var(--blue);
  width: 44px;
  padding-top: 2px;
}

.pub-body { flex: 1; }

.pub-authors {
  font-size: .86rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.pub-title {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.4;
}

.pub-journal {
  font-size: .83rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.pub-link {
  font-size: .8rem;
  font-weight: 600;
  color: var(--blue);
  padding: 3px 10px;
  background: var(--blue-pale);
  border-radius: 6px;
  transition: all var(--transition);
}
.pub-link:hover {
  background: var(--blue);
  color: #fff;
}

.pubs-cta { text-align: center; }

/* ---------- Laboratories ---------- */
.labs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(460px, 1fr));
  gap: 32px;
  margin-bottom: 56px;
}

.lab-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  background: var(--bg);
}

.lab-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.lab-img {
  height: 180px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lab-img-electro {
  background: linear-gradient(135deg, #002f6c 0%, #0083ca 100%);
}

.lab-img-mossbauer {
  background: linear-gradient(135deg, #3d0a6e 0%, #7b2fbe 100%);
}

.lab-img-overlay {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23fff' fill-opacity='0.05'%3E%3Ccircle cx='20' cy='20' r='8'/%3E%3Ccircle cx='0' cy='0' r='8'/%3E%3Ccircle cx='40' cy='0' r='8'/%3E%3Ccircle cx='0' cy='40' r='8'/%3E%3Ccircle cx='40' cy='40' r='8'/%3E%3C/g%3E%3C/svg%3E");
}

.lab-icon {
  font-size: 3.5rem;
  position: relative;
  z-index: 1;
}

.lab-content {
  padding: 28px;
}

.lab-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.lab-content p {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.lab-equipment {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lab-equipment li {
  font-size: .84rem;
  color: var(--text);
  padding: 8px 14px;
  background: var(--bg-alt);
  border-radius: 8px;
  border-left: 3px solid var(--blue-light);
}

/* Large facilities */
.large-facilities {
  background: linear-gradient(135deg, var(--blue-dark) 0%, #0057b8 100%);
  border-radius: var(--radius-lg);
  padding: 40px;
  color: #fff;
  text-align: center;
}

.large-facilities h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.large-facilities p {
  color: rgba(255,255,255,.8);
  font-size: .95rem;
  margin-bottom: 28px;
}

.facilities-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.facility-badge {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.3);
  color: #fff;
  padding: 8px 20px;
  border-radius: 100px;
  font-size: .88rem;
  font-weight: 600;
  transition: all var(--transition);
}
.facility-badge:hover {
  background: rgba(255,255,255,.25);
}

/* ---------- Teaching ---------- */
.teaching-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.teaching-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
}
.teaching-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--blue-light);
  transform: translateY(-4px);
}

.teaching-icon {
  font-size: 2.8rem;
  margin-bottom: 20px;
}

.teaching-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  line-height: 1.3;
}

.teaching-card p {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
}

/* Teaching – degree blocks */
.teaching-degree-block {
  margin-bottom: 36px;
}
.teaching-degree-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: linear-gradient(135deg, var(--blue-pale), #f0f4ff);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.teaching-degree-icon {
  font-size: 2.4rem;
}
.teaching-degree-info {
  flex: 1;
  min-width: 200px;
}
.teaching-degree-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--blue-dark);
  margin: 0 0 4px;
}
.teaching-degree-uni {
  font-size: .82rem;
  color: var(--text-muted);
}
.teaching-degree-link {
  font-size: .88rem;
  font-weight: 600;
  color: var(--blue);
  white-space: nowrap;
}
.teaching-degree-link:hover {
  color: var(--blue-light);
}

.teaching-subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.teaching-subject-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all var(--transition);
}
.teaching-subject-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--blue-light);
  transform: translateY(-2px);
}
.teaching-subject-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.teaching-subject-top h4 {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  line-height: 1.35;
}
.teaching-subject-code {
  font-size: .72rem;
  font-weight: 600;
  color: var(--blue);
  background: var(--blue-pale);
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
}
.teaching-subject-meta {
  display: flex;
  gap: 14px;
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.teaching-subject-desc {
  font-size: .84rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 10px;
}
.teaching-subject-link {
  font-size: .82rem;
  font-weight: 600;
  color: var(--blue);
}
.teaching-subject-link:hover {
  color: var(--blue-light);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 56px;
  align-items: start;
}

.contact-block {
  margin-bottom: 32px;
}

.contact-block h3 {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 8px;
}

.contact-block address,
.contact-block p {
  font-size: .92rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.contact-link {
  font-size: .92rem;
  color: var(--blue);
  font-weight: 500;
}

/* Contact Form */
.contact-form {
  background: linear-gradient(180deg, #ffffff, #f7fbff);
  border: 1px solid #d6e4f5;
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: 0 12px 30px rgba(0, 47, 108, .08);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: .82rem;
  font-weight: 700;
  color: #17345b;
  letter-spacing: .01em;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  border: 1px solid #ccdbef;
  border-radius: 10px;
  font-size: .9rem;
  font-family: var(--font);
  color: var(--text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(0,87,184,.12);
  transform: translateY(-1px);
}

.form-note {
  font-size: .78rem;
  color: var(--text-muted);
  margin-top: -8px;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--blue-dark);
  color: rgba(255,255,255,.7);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-brand .logo-mark {
  background: rgba(255,255,255,.15);
}

.footer-brand .logo-name { color: #fff; }
.footer-brand .logo-sub { color: rgba(255,255,255,.5); }

.footer-brand p {
  font-size: .88rem;
  line-height: 1.7;
}

.footer-links h4 {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.5);
  margin-bottom: 16px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: .88rem;
  color: rgba(255,255,255,.65);
  transition: color var(--transition);
}
.footer-links a:hover { color: #fff; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: .82rem;
  color: rgba(255,255,255,.4);
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: #fff; }

/* ---------- Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    box-shadow: var(--shadow);
    z-index: 999;
  }
  .nav-toggle { display: flex; }
  .nav-dropdown-menu {
    position: static;
    display: block;
    box-shadow: none;
    border: none;
    padding: 0 0 0 16px;
    min-width: 0;
  }
  .nav-dropdown-menu a {
    padding: 6px 12px;
    font-size: .84rem;
  }
  .nav-arrow { display: none; }
  .labs-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .hero-stats { gap: 28px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .project-year { width: 80px; font-size: .75rem; padding: 20px 12px; }
  .project-body { padding: 20px 16px; }
  .contact-form { padding: 24px; }
  .member-card { flex-direction: column; align-items: flex-start; }
  .carousel-slide img { aspect-ratio: 4/3; }
  .carousel-caption { padding: 36px 16px 12px; }
  .carousel-caption p { font-size: .84rem; }
}

/* ============================================================
   Additional styles for Django inner pages
   ============================================================ */

/* Page section (inner pages below header) */
.page-section { padding-top: 120px; }

/* WebPage WYSIWYG content rendering */
.webpage-content h1, .webpage-content h2, .webpage-content h3 {
  margin: 24px 0 12px;
  color: var(--blue-dark);
  line-height: 1.35;
}
.webpage-content h1 { font-size: 1.6rem; }
.webpage-content h2 { font-size: 1.3rem; }
.webpage-content h3 { font-size: 1.1rem; }
.webpage-content p { margin-bottom: 14px; line-height: 1.75; font-size: .95rem; }
.webpage-content ul, .webpage-content ol { margin: 12px 0 12px 24px; line-height: 1.75; font-size: .95rem; }
.webpage-content li { margin-bottom: 4px; }
.webpage-content ul { list-style: disc; }
.webpage-content ol { list-style: decimal; }
.webpage-content a { color: var(--blue); text-decoration: underline; }
.webpage-content a:hover { color: var(--blue-light); }
.webpage-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 16px 0;
  box-shadow: var(--shadow-sm);
}
.webpage-content blockquote {
  border-left: 4px solid var(--blue-light);
  padding: 12px 20px;
  margin: 16px 0;
  background: var(--blue-pale);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--text-muted);
}
.webpage-content pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 16px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: .88rem;
  margin: 16px 0;
}
.webpage-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
}
.webpage-content table td, .webpage-content table th {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  font-size: .92rem;
}
.webpage-content table th {
  background: var(--bg-alt);
  font-weight: 600;
}
.webpage-content table tr:hover td {
  background: #fafbfd;
}
.webpage-content hr {
  border: none;
  border-top: 2px solid var(--border);
  margin: 24px 0;
}
.webpage-content sup { font-size: .75em; }
.webpage-content sub { font-size: .75em; }
.webpage-content .box-info {
  background: var(--blue-pale);
  border-left: 4px solid var(--blue);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 16px 0;
}
.webpage-content .box-warn {
  background: var(--accent-lt);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 16px 0;
}
.webpage-content .box-ok {
  background: #f0fdf4;
  border-left: 4px solid #16a34a;
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 16px 0;
}
.webpage-content iframe, .webpage-content video {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 16px 0;
}
.webpage-content figure {
  margin: 16px 0;
  text-align: center;
}
.webpage-content figcaption {
  font-size: .82rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-style: italic;
}

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 32px;
  padding: 6px 14px;
  background: var(--blue-pale);
  border-radius: 8px;
  transition: all var(--transition);
}
.back-link:hover { background: var(--blue); color: #fff; }

/* Back to top */
.back-to-top {
  display: inline-block;
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: 16px;
}

/* Category titles */
.category-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: .06em;
  border-bottom: 2px solid var(--blue-pale);
  padding-bottom: 8px;
  margin: 48px 0 24px;
}
.category-title:first-child { margin-top: 0; }

/* Members category grouping */
.members-category { margin-bottom: 48px; }

/* Member profile (detail page) */
.member-profile {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  margin-bottom: 40px;
}
.member-profile-photo img,
.member-avatar-lg {
  width: 140px;
  height: 140px;
  border-radius: 20px;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: var(--shadow);
}
.member-avatar-lg {
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2.5rem;
  font-weight: 700;
}
.member-profile-info h1 {
  font-size: 1.8rem;
  margin: 8px 0 12px;
}
.member-contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.contact-chip {
  font-size: .82rem;
  padding: 5px 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
}
.contact-chip a { color: var(--blue); }

.member-bio, .member-extra {
  margin-bottom: 32px;
  font-size: .95rem;
  color: var(--text);
  line-height: 1.75;
}
.member-extra h3 { font-size: 1rem; color: var(--text); margin-bottom: 8px; }

.section-divider {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  border-bottom: 2px solid var(--border);
  padding-bottom: 10px;
  margin: 40px 0 24px;
}

.member-section { margin-bottom: 48px; }

/* Research lines */
.rl-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 48px;
}
.rl-index-link {
  background: var(--blue-pale);
  color: var(--blue);
  padding: 7px 16px;
  border-radius: 100px;
  font-size: .85rem;
  font-weight: 600;
  transition: all var(--transition);
}
.rl-index-link:hover { background: var(--blue); color: #fff; }

.research-line-full, .research-line-block {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}
.research-line-full:last-child, .research-line-block:last-child { border-bottom: none; }
.research-line-full h2, .research-line-block h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--blue-dark);
  margin-bottom: 16px;
}
.rl-text {
  font-size: .95rem;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 16px;
}
.rl-papers h4 {
  font-size: .82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.papers-inline {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
}
.papers-inline li {
  font-size: .87rem;
  color: var(--text);
  padding: 8px 12px;
  background: var(--bg-alt);
  border-radius: 8px;
  border-left: 3px solid var(--blue-light);
  line-height: 1.5;
}
.pub-title-sm { font-weight: 600; }

/* Publications filter */
.pub-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.filter-chip {
  font-size: .82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all var(--transition);
}
.filter-chip:hover, .filter-chip.active {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin: 36px 0 8px;
}
.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: 8px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: .85rem;
  font-weight: 600;
  transition: all var(--transition);
}
.page-link:hover { background: var(--blue-pale); border-color: var(--blue); color: var(--blue); }
.page-link.active { background: var(--blue); border-color: var(--blue); color: #fff; cursor: default; }
.page-info { font-size: .8rem; color: var(--text-muted); margin-left: 8px; }

/* Thesis type badge */
.thesis-type-badge {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  background: var(--blue-pale);
  color: var(--blue);
  border-radius: 100px;
  padding: 2px 10px;
  margin-right: 6px;
}

/* Cited badge */
.cited-badge {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  background: var(--accent-lt);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 100px;
  margin-left: 8px;
}

/* Projects meta */
.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: .84rem;
  color: var(--text-muted);
  margin-top: 8px;
}
.project-researchers {
  font-size: .84rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Thesis */
.thesis-group { margin-bottom: 48px; }
.thesis-list { display: flex; flex-direction: column; gap: 0; }
.thesis-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.thesis-item:last-child { border-bottom: none; }
.thesis-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 8px;
}
.thesis-title { font-size: .95rem; font-weight: 600; line-height: 1.4; }
.thesis-year {
  flex-shrink: 0;
  font-size: .82rem;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-pale);
  padding: 3px 10px;
  border-radius: 100px;
}
.thesis-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: .83rem;
  color: var(--text-muted);
}
.thesis-abstract {
  margin-top: 10px;
  font-size: .87rem;
}
.thesis-abstract summary {
  cursor: pointer;
  color: var(--blue);
  font-weight: 600;
  font-size: .82rem;
}
.thesis-abstract p { margin-top: 10px; color: var(--text-muted); line-height: 1.65; }

/* Member list card as link */
a.member-card { text-decoration: none; color: inherit; cursor: pointer; }
a.member-card:hover { box-shadow: var(--shadow); border-color: var(--blue-light); transform: translateY(-2px); }

/* Pub list clean (member detail) */
.pub-list-clean { display: flex; flex-direction: column; gap: 0; list-style: none; }
.pub-list-clean li {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.pub-list-clean li:last-child { border-bottom: none; }
.pub-year-badge {
  flex-shrink: 0;
  font-size: .8rem;
  font-weight: 700;
  color: var(--blue);
  padding-top: 2px;
  width: 40px;
}

/* Contact form success */
.form-success {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
}
.form-success-icon {
  width: 56px; height: 56px;
  background: #16a34a;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 20px;
}
.form-success h3 { font-size: 1.3rem; margin-bottom: 8px; }
.form-success p { color: var(--text-muted); margin-bottom: 24px; }

/* Contact form send error */
.form-error-box {
  background: #fff5f5;
  border: 1px solid #fca5a5;
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  text-align: center;
}
.form-error-box h3 { font-size: 1.2rem; color: #b91c1c; margin-bottom: 8px; }
.form-error-box p  { color: var(--text-muted); margin-bottom: 20px; }

/* Form field validation error */
.form-error { font-size: .8rem; color: #dc2626; margin-top: 4px; display: block; }

/* Empty state */
.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 48px;
  font-size: .95rem;
}

/* Group photo */
.group-photo-section {
  padding: 48px 0 8px;
  background: var(--bg-alt);
}
.group-photo {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: 12px;
  display: block;
}

/* Carousel */
.carousel-section { padding: 40px 0; background: var(--bg-alt); }
.carousel-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
}
.carousel-track { position: relative; width: 100%; }
.carousel-slide {
  display: none;
  position: relative;
}
.carousel-slide.active { display: block; }
.carousel-slide img {
  width: 100%;
  display: block;
  object-fit: contain;
}

@media (max-width: 768px) {
  .carousel-slide img {
    max-height: 220px;
    object-fit: cover;
  }
}
.carousel-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(0,0,0,.75), transparent);
  color: #fff;
  padding: 48px 24px 16px;
  text-align: center;
  z-index: 5;
}
.carousel-caption p { font-size: .92rem; margin: 0; opacity: .9; line-height: 1.5; }
.carousel-btn {
  position: absolute;
  top: 16px;
  background: rgba(0,0,0,.35);
  border: none;
  color: #fff;
  font-size: 1.6rem;
  width: 40px; height: 40px;
  border-radius: 50%;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: background var(--transition);
  z-index: 10;
}
.carousel-btn:hover { background: rgba(0,0,0,.55); }
.carousel-prev { right: 68px; }
.carousel-next { right: 16px; }

/* Lang toggle as links */
.lang-toggle { display: flex; align-items: center; gap: 4px; border: 1px solid var(--border); border-radius: 6px; padding: 5px 10px; flex-shrink: 0; }
.lang-opt { font-size: .82rem; color: var(--text-muted); text-decoration: none; cursor: pointer; transition: color var(--transition); }
.lang-opt.active { color: var(--blue); font-weight: 700; }
.lang-opt:hover { color: var(--blue); }

/* Responsive additions */
@media (max-width: 700px) {
  .member-profile { flex-direction: column; gap: 20px; }
  .member-profile-photo img, .member-avatar-lg { width: 100px; height: 100px; }
  .thesis-header { flex-direction: column; gap: 4px; }
}

/* ---------- Portal works editor ---------- */
.portal-work-container,
.portal-edit-container {
  max-width: 980px;
}

.portal-subtitle {
  color: var(--text-muted);
  margin-bottom: 10px;
}

.portal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 24px;
}

.portal-work-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  padding: 1.2rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.portal-work-card-header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.portal-work-card-header h2 {
  margin: 0;
  color: var(--blue-dark);
}

.portal-work-list {
  margin: 0;
  padding-left: 1.1rem;
  list-style: disc;
}

.portal-work-list li {
  margin: .7rem 0;
}

.portal-work-list small {
  color: var(--text-muted);
}

.portal-empty-state {
  margin-bottom: 0;
  color: var(--text-muted);
}

.portal-edit-form {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.portal-form-row {
  margin-bottom: .95rem;
}

.portal-form-row label {
  display: block;
  font-weight: 600;
  margin-bottom: .32rem;
}

.portal-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.portal-input:focus {
  outline: none;
  border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(0, 131, 202, .12);
}

.portal-help-text {
  display: block;
  color: var(--text-muted);
  margin-top: 4px;
  font-size: .85rem;
}

.portal-field-error {
  color: #a3123f;
  font-size: .88rem;
  margin-top: 4px;
}

/* ---------- Portal login ---------- */
.portal-auth-container {
  max-width: 620px;
}

.portal-auth-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff, #f7fbff);
  box-shadow: var(--shadow);
  padding: 2rem;
}

.portal-auth-card h1 {
  margin: .2rem 0 .6rem;
  color: var(--blue-dark);
}

.portal-auth-form {
  margin-top: 1.2rem;
}

.portal-auth-form .btn {
  margin-top: .6rem;
}

/* ---------- Error pages ---------- */
.error-container {
  max-width: 720px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff, #f7fbff);
  box-shadow: var(--shadow-sm);
  padding: 2.2rem 2rem;
}

.error-code {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
  margin-bottom: .6rem;
}

.error-container h1 {
  margin-bottom: .4rem;
  color: var(--blue-dark);
}

.error-container p {
  margin-bottom: 1.2rem;
  color: var(--text-muted);
}