/* ============================================
   MJG Ingenieur-GmbH — Website Stylesheet
   Aesthetic: Refined Industrial Minimalism
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --color-navy: #1a2a3a;
  --color-navy-deep: #0f1c2a;
  --color-steel: #2c4a6a;
  --color-steel-light: #3d6a8e;
  --color-slate: #5a7a94;
  --color-silver: #8fa8b8;
  --color-cloud: #c4d4df;
  --color-ice: #e8eff4;
  --color-white: #f5f7f9;
  --color-pure-white: #ffffff;
  --color-copper: #c47a3a;
  --color-copper-light: #d4944e;
  --color-copper-glow: rgba(196, 122, 58, 0.15);
  --color-text: #1a2a3a;
  --color-text-muted: #5a7a94;
  --color-text-light: #8fa8b8;
  --color-border: #d4dfe8;
  --color-bg: #f5f7f9;
  --color-bg-alt: #e8eff4;

  --font-heading: 'Libre Baskerville', Georgia, serif;
  --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;

  --shadow-sm: 0 1px 3px rgba(26, 42, 58, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 42, 58, 0.08);
  --shadow-lg: 0 8px 32px rgba(26, 42, 58, 0.12);
  --shadow-copper: 0 4px 20px rgba(196, 122, 58, 0.2);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --max-width: 1200px;
  --header-height: 80px;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-steel);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-copper);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-navy);
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

h4 {
  font-size: 1.1rem;
  font-family: var(--font-body);
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

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

.text-copper {
  color: var(--color-copper);
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--color-pure-white);
}

.section-dark {
  background: var(--color-navy-deep);
  color: var(--color-cloud);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-pure-white);
}

/* --- Geometric Accent Line --- */
.accent-line {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-copper), var(--color-copper-light));
  margin: 1rem 0 1.5rem;
  border-radius: 2px;
}

.accent-line-center {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-navy);
}

.logo-img {
  height: 44px;
  width: auto;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text .name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-navy);
}

.logo-text .tagline {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-links a {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  letter-spacing: 0.02em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-navy);
  background: var(--color-bg-alt);
}

.nav-links a.active {
  color: var(--color-copper);
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-size: 0.82rem;
  font-weight: 600;
}

.lang-toggle button {
  padding: 0.35rem 0.65rem;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.lang-toggle button.active {
  background: var(--color-navy);
  color: var(--color-pure-white);
}

.lang-toggle button:hover:not(.active) {
  background: var(--color-bg-alt);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border: none;
  background: none;
  cursor: pointer;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 1px;
  transition: var(--transition);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  padding-top: calc(var(--header-height) + 4rem);
  padding-bottom: 5rem;
  position: relative;
  overflow: hidden;
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -10%;
  width: 55%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-ice), transparent);
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0% 100%);
  z-index: 0;
}

/* Subtle grid pattern */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.25;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 680px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-copper);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s 0.2s forwards;
}

.hero-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--color-copper);
  border-radius: 1px;
}

.hero h1 {
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s 0.35s forwards;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.8;
  opacity: 0;
  animation: fadeInUp 0.6s 0.5s forwards;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.6s 0.65s forwards;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--color-navy);
  color: var(--color-pure-white);
}

.btn-primary:hover {
  background: var(--color-steel);
  color: var(--color-pure-white);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-navy);
  border: 2px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-copper);
  color: var(--color-copper);
}

.btn-copper {
  background: var(--color-copper);
  color: var(--color-pure-white);
}

.btn-copper:hover {
  background: var(--color-copper-light);
  color: var(--color-pure-white);
  box-shadow: var(--shadow-copper);
  transform: translateY(-1px);
}

.btn-icon {
  font-size: 1.1rem;
  transition: transform var(--transition);
}

.btn:hover .btn-icon {
  transform: translateX(3px);
}

/* ============================================
   CONTENT CARDS & GRIDS
   ============================================ */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--color-pure-white);
  border-radius: var(--radius-md);
  padding: 2rem;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-cloud);
  transform: translateY(-2px);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--color-copper-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.4rem;
  color: var(--color-copper);
}

.card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-copper);
}

.card-link:hover {
  gap: 0.6rem;
}

/* Card with top accent */
.card-accent {
  border-top: 3px solid var(--color-copper);
}

/* --- Section Header --- */
.section-header {
  margin-bottom: 3rem;
}

.section-header.center {
  text-align: center;
}

.section-header .label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-copper);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--color-text-muted);
  max-width: 640px;
  font-size: 1.05rem;
}

.section-header.center p {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   FEATURE / STATS ROW
   ============================================ */
.stats-row {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  padding: 3rem 0;
}

.stat {
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-copper);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================
   PROJECT CARDS
   ============================================ */
.project-card {
  background: var(--color-pure-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.project-card-image {
  height: 220px;
  background: linear-gradient(135deg, var(--color-navy), var(--color-steel));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 20px 20px;
}

.project-card-image .icon {
  font-size: 3rem;
  opacity: 0.4;
  z-index: 1;
}

.project-card-body {
  padding: 1.75rem;
}

.project-card-body .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-copper);
  background: var(--color-copper-glow);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.project-card-body h3 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.project-card-body p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ============================================
   ABOUT / TEXT + IMAGE LAYOUTS
   ============================================ */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.split-image {
  background: linear-gradient(135deg, var(--color-navy), var(--color-steel));
  border-radius: var(--radius-lg);
  height: 400px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.split-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 30px 30px;
  z-index: 1;
  pointer-events: none;
}

.split-image .content-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 1.5rem;
  position: relative;
  z-index: 2;
}

.split-image-pair {
  display: flex;
  gap: 1rem;
  background: linear-gradient(135deg, var(--color-navy), var(--color-steel));
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  min-height: 300px;
  align-items: stretch;
}

.pair-fig {
  flex: 1;
  margin: 0;
  text-align: center;
  display: flex;
  flex-direction: column;
}

.pair-fig img {
  flex: 1;
  width: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.pair-fig figcaption {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.7);
  margin-top: 0.5rem;
  font-style: italic;
}

@media (max-width: 768px) {
  .split-image-pair {
    min-height: 200px;
    padding: 1rem;
  }
}

.split-image .placeholder-icon {
  font-size: 4rem;
  opacity: 0.3;
  z-index: 1;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

.contact-info-card:last-child {
  border-bottom: none;
}

.contact-icon {
  width: 42px;
  height: 42px;
  background: var(--color-copper-glow);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-copper);
  flex-shrink: 0;
}

.contact-info-card h4 {
  margin-bottom: 0.2rem;
}

.contact-info-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.contact-form {
  background: var(--color-pure-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-navy);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-copper);
  box-shadow: 0 0 0 3px var(--color-copper-glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-navy-deep);
  color: var(--color-silver);
  padding: 3.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo-text .name {
  color: var(--color-pure-white);
}

.footer-brand .logo-text .tagline {
  color: var(--color-silver);
}

.footer-brand p {
  margin-top: 1rem;
  font-size: 0.92rem;
  color: var(--color-silver);
  line-height: 1.7;
  max-width: 340px;
}

.footer-col h4 {
  color: var(--color-pure-white);
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.6rem;
}

.footer-col ul li a {
  color: var(--color-silver);
  font-size: 0.92rem;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--color-copper-light);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--color-slate);
}

.footer-bottom a {
  color: var(--color-silver);
}

/* ============================================
   PAGE BANNER (for sub-pages)
   ============================================ */
.page-banner {
  padding-top: calc(var(--header-height) + 3.5rem);
  padding-bottom: 3.5rem;
  background: var(--color-navy-deep);
  color: var(--color-cloud);
  position: relative;
  overflow: hidden;
}

.page-banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.page-banner .container {
  position: relative;
  z-index: 1;
}

.page-banner h1 {
  color: var(--color-pure-white);
  margin-bottom: 0.75rem;
}

.page-banner p {
  color: var(--color-silver);
  font-size: 1.1rem;
  max-width: 600px;
}

.breadcrumb {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  color: var(--color-slate);
}

.breadcrumb a {
  color: var(--color-silver);
}

.breadcrumb a:hover {
  color: var(--color-copper-light);
}

/* ============================================
   EXPLANATION / CONTENT PAGES
   ============================================ */
.content-page {
  padding: 4rem 0;
}

.content-page .content-body {
  max-width: 780px;
  margin: 0 auto;
}

.content-body h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.content-body h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.content-body p {
  color: var(--color-text);
  line-height: 1.8;
}

.content-body ul,
.content-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.content-body li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.info-box {
  background: var(--color-copper-glow);
  border-left: 3px solid var(--color-copper);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 2rem 0;
}

.info-box p {
  margin-bottom: 0;
  color: var(--color-navy);
  font-size: 0.95rem;
}

/* ============================================
   REFERENCE CATEGORY CARDS
   ============================================ */
.ref-category-card {
  background: var(--color-pure-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
}

.ref-category-card:hover {
  border-color: var(--color-copper);
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

.ref-category-header h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--color-navy);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-copper);
}

.ref-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.ref-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.ref-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--color-copper);
  border-radius: 50%;
}

/* ============================================
   GUTACHTEN HERO IMAGE
   ============================================ */
.gutachten-hero {
  display: flex;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.gutachten-hero-img {
  max-height: 320px;
  width: auto;
  object-fit: contain;
  background: linear-gradient(135deg, var(--color-navy), var(--color-steel));
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

/* ============================================
   MEMBERSHIPS
   ============================================ */
.memberships-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.membership-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--color-pure-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  text-decoration: none;
}

.membership-card:hover {
  border-color: var(--color-copper);
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
  transform: translateY(-3px);
}

.membership-abbr {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.75rem;
  letter-spacing: 0.03em;
}

.membership-card:hover .membership-abbr {
  color: var(--color-copper);
}

.membership-name {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .memberships-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   PUBLICATIONS LIST
   ============================================ */
.publications-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.pub-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
  transition: var(--transition);
}

.pub-item:first-child {
  padding-top: 0;
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-item:hover {
  background: var(--color-copper-glow);
  margin-left: -1rem;
  margin-right: -1rem;
  padding-left: 1rem;
  padding-right: 1rem;
  border-radius: var(--radius-sm);
}

.pub-date {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: var(--color-navy);
  color: var(--color-pure-white);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: -0.01em;
}

.pub-content {
  flex: 1;
  min-width: 0;
}

.pub-content a {
  display: block;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-navy);
  margin-bottom: 0.3rem;
  transition: color var(--transition);
}

.pub-content a:hover {
  color: var(--color-copper);
}

.pub-source {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.pub-source a {
  display: inline;
  font-size: 0.82rem;
  font-weight: 600;
  font-style: normal;
  color: var(--color-copper);
}

.pub-source a:hover {
  color: var(--color-copper-light);
}

.pub-title-nolink {
  display: block;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-navy);
  margin-bottom: 0.3rem;
}

.pub-type-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-copper);
  background: var(--color-copper-glow);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-right: 0.5rem;
  font-style: normal;
}

.pub-year-heading {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-navy);
  padding-top: 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-copper);
  margin-bottom: 0.5rem;
}

.pub-year-heading:first-child {
  padding-top: 0;
}

@media (max-width: 768px) {
  .pub-date {
    width: 46px;
    height: 46px;
    font-size: 0.78rem;
  }
  .pub-item {
    gap: 1rem;
  }
}

/* ============================================
   PGP KEYS
   ============================================ */
.pgp-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--color-pure-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.pgp-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.pgp-card h4 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: var(--color-navy);
}

.pgp-download {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  color: var(--color-copper);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.pgp-download:hover {
  color: var(--color-navy);
}

/* ============================================
   KNOWLEDGE IMAGES
   ============================================ */
.knowledge-images {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.knowledge-images-5 {
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}

.knowledge-fig {
  margin: 0;
  text-align: center;
}

.knowledge-fig img {
  width: 100%;
  height: 180px;
  object-fit: contain;
  background: linear-gradient(135deg, var(--color-navy), var(--color-steel));
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}

.knowledge-fig figcaption {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  font-style: italic;
}

@media (max-width: 768px) {
  .knowledge-images {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .knowledge-images-5 {
    grid-template-columns: repeat(3, 1fr);
  }
  .knowledge-fig img {
    height: 140px;
  }
}

@media (max-width: 480px) {
  .knowledge-images-5 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.4s; }

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .split-layout {
    gap: 2.5rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 68px;
  }

  .main-nav .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-pure-white);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .main-nav .nav-links.open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .split-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .split-image {
    height: 280px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 3rem);
    padding-bottom: 3rem;
  }

  .stats-row {
    gap: 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .section {
    padding: 3.5rem 0;
  }

  .logo-text {
    display: none;
  }
}