/* FLOQI — Full Lifecycle Post-Quantum PKI */

:root {
  --color-ink: #0f1117;
  --color-slate: #2b2f3a;
  --color-mist: #e8eaed;
  --color-gold: #c9a227;
  --color-gold-light: #e8d48a;
  --color-teal: #1a6b5c;
  --color-teal-light: #2a8f7a;
  --color-signal: #d64545;
  --color-paper: #fafaf8;
  --color-white: #ffffff;
  --color-border: #d4d8de;

  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-serif: "Source Serif 4", Georgia, serif;
  --font-mono: "IBM Plex Mono", monospace;

  --container: 1120px;
  --section-pad: clamp(4rem, 8vw, 7.5rem);
  --transition: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-slate);
  background: var(--color-mist);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--color-teal-light); }

h1, h2, h3, h4, h5, h6,
.site-title {
  font-family: var(--font-sans);
  color: var(--color-ink);
  line-height: 1.25;
  font-weight: 600;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); font-weight: 500; }

p { max-width: 65ch; margin: 0 0 1.25rem; }

.container {
  width: min(var(--container), calc(100% - 2.5rem));
  margin-inline: auto;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.25rem;
  background: var(--color-gold);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 2px 20px rgba(15, 17, 23, 0.06); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0;
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}
.brand:hover { color: inherit; }
.brand .site-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin: 0;
  line-height: 1.2;
}
.brand .tagline {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-slate);
  opacity: 0.7;
}

.nav-primary {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-primary a {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-slate);
  padding: 0.5rem 0.85rem;
  position: relative;
}
.nav-primary a::after {
  content: "";
  position: absolute;
  bottom: 0.25rem;
  left: 0.85rem;
  width: 0;
  height: 2px;
  background: var(--color-gold);
  transition: width var(--transition);
}
.nav-primary a:hover::after,
.nav-primary a.active::after { width: calc(100% - 1.7rem); }
.nav-primary a:hover { color: var(--color-ink); }
.nav-primary a.active { color: var(--color-ink); font-weight: 600; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switch {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-slate);
  text-decoration: none;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 3px;
}
.lang-switch:hover { border-color: var(--color-gold); color: var(--color-ink); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-ink);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  margin: 5px 0;
  transition: var(--transition);
}

/* Mobile nav */
@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-primary {
    position: fixed;
    top: 0;
    left: 0;
    width: min(320px, 85vw);
    height: 100vh;
    flex-direction: column;
    align-items: stretch;
    padding: 5rem 1.5rem 2rem;
    background: var(--color-paper);
    box-shadow: 4px 0 24px rgba(0,0,0,0.12);
    transform: translateX(-100%);
    transition: transform 300ms ease;
    z-index: 200;
  }
  .nav-primary.open { transform: translateX(0); }
  .nav-primary a { padding: 0.85rem 0; font-size: 0.85rem; }
  .nav-primary a::after { display: none; }
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15,17,23,0.4);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 150;
  }
  .nav-overlay.open { opacity: 1; visibility: visible; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.85rem 1.75rem;
  border: 2px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
}
.btn-primary:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-ink);
}
.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-white);
}
.btn-group { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }

/* Hero — asymmetric editorial layout */
.hero {
  padding: var(--section-pad) 0;
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-border);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.hero-lead {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-slate);
  margin-top: 1.5rem;
}
.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-top: 0.5rem;
}
.meta-card {
  background: var(--color-mist);
  border-left: 3px solid var(--color-gold);
  padding: 1.25rem 1.5rem;
}
.meta-card h3 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-slate);
  margin: 0 0 0.5rem;
  font-weight: 600;
}
.meta-card p { margin: 0; font-size: 0.95rem; max-width: none; }
.meta-stat {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1;
}
.badge-bmbf {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-teal);
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--color-teal);
  border-radius: 2px;
}

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

/* Sections */
.section {
  padding: var(--section-pad) 0;
}
.section-dark {
  background: var(--color-ink);
  color: rgba(255,255,255,0.85);
}
.section-dark h2, .section-dark h3 { color: var(--color-white); }
.section-dark a { color: var(--color-gold-light); }
.section-alt { background: var(--color-paper); }

.section-label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 0.75rem;
}
.section-dark .section-label { color: var(--color-gold-light); }

/* Two-column editorial */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}
.split-offset { grid-template-columns: 0.55fr 0.45fr; }

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

/* Pull quote */
.pullquote {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-style: italic;
  line-height: 1.5;
  color: var(--color-ink);
  border-left: 4px solid var(--color-gold);
  padding: 0.5rem 0 0.5rem 1.75rem;
  margin: 2rem 0;
  max-width: 50ch;
}
.section-dark .pullquote { color: var(--color-white); border-color: var(--color-gold); }

/* Goal list */
.goal-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}
.goal-list li {
  position: relative;
  padding: 0.85rem 0 0.85rem 2rem;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  max-width: 65ch;
}
.goal-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-gold);
  font-weight: 600;
}
.section-dark .goal-list li { border-color: rgba(255,255,255,0.12); }

/* Partner grid */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 2.5rem;
}
.partner-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), transform var(--transition);
}
.partner-item:hover {
  border-color: var(--color-gold);
  transform: translateY(-2px);
}
.partner-logo {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-slate);
  background: var(--color-mist);
  border-radius: 4px;
  margin-bottom: 0.75rem;
}
.partner-item span {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-slate);
  line-height: 1.4;
}

@media (max-width: 768px) {
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Publication teaser */
.pub-card {
  background: var(--color-mist);
  padding: 1.75rem;
  border-top: 3px solid var(--color-teal);
  transition: transform var(--transition), box-shadow var(--transition);
}
.pub-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(15,17,23,0.08);
}
.pub-card .venue {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-teal);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}
.pub-card h3 {
  font-size: 1rem;
  margin: 0 0 0.5rem;
  line-height: 1.4;
}
.pub-card p { font-size: 0.875rem; margin: 0; max-width: none; opacity: 0.8; }

/* Contact teaser */
.contact-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.contact-strip h2 { margin: 0; }
.contact-email {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  color: var(--color-gold-light);
  text-decoration: none;
}
.contact-email:hover { color: var(--color-white); }

/* Page header (inner pages) */
.page-header {
  padding: calc(var(--section-pad) * 0.7) 0 calc(var(--section-pad) * 0.5);
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-border);
}
.page-header h1 { margin: 0 0 1rem; }
.page-header .lead {
  font-size: 1.125rem;
  max-width: 60ch;
  margin: 0;
}

/* Content page */
.page-content {
  padding: var(--section-pad) 0;
}
.page-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}
.page-content h2:first-child { margin-top: 0; }
.page-content ul, .page-content ol {
  max-width: 65ch;
  padding-left: 1.25rem;
}
.page-content li { margin-bottom: 0.5rem; }

/* Consortium table */
.consortium-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}
.consortium-table th,
.consortium-table td {
  text-align: left;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
}
.consortium-table th {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-slate);
  background: var(--color-mist);
  font-weight: 600;
}
.consortium-table tr:hover td { background: var(--color-paper); }

/* Approach blocks */
.approach-blocks {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}
.approach-block {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 2rem;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
}
.approach-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-gold);
  line-height: 1;
}
.approach-block h3 { margin: 0 0 0.5rem; }
.approach-block p { margin: 0; max-width: none; }

/* Contact form */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}
.contact-info h2 { margin-top: 0; }
.contact-detail {
  margin-bottom: 1.5rem;
}
.contact-detail dt {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-slate);
  margin-bottom: 0.25rem;
}
.contact-detail dd {
  margin: 0;
  font-size: 1rem;
}
.contact-detail dd a { text-decoration: none; }
.contact-detail dd a:hover { text-decoration: underline; }

.contact-form {
  background: var(--color-paper);
  padding: 2.5rem;
  border: 1px solid var(--color-border);
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-slate);
  margin-bottom: 0.4rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-serif);
  font-size: 1rem;
  border: 2px solid var(--color-border);
  border-radius: 2px;
  background: var(--color-white);
  color: var(--color-ink);
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-gold);
}
.form-group textarea { min-height: 140px; resize: vertical; }
.form-note {
  font-size: 0.8rem;
  color: var(--color-slate);
  opacity: 0.7;
  margin-top: 1rem;
}

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

/* Legal pages */
.legal-content h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
}
.legal-content h3 {
  font-size: 1rem;
  margin-top: 1.5rem;
}

/* Footer */
.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.7);
  padding: 3.5rem 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold-light);
  margin: 0 0 1rem;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.85rem;
}
.footer-col a:hover { color: var(--color-white); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0;
  font-family: var(--font-sans);
  font-size: 0.75rem;
}

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

/* Brand logo in header */
.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}
.brand-mark:hover { color: inherit; }
.brand-mark img {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  object-fit: contain;
  flex-shrink: 0;
}
.brand-mark span {
  display: flex;
  flex-direction: column;
}
.brand-mark .site-title { margin: 0; }

/* Hero with background image */
.hero--visual {
  position: relative;
  background: var(--color-ink);
  color: var(--color-white);
  overflow: hidden;
}
.hero--visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("../img/content/hero-floqi.jpg") center/cover no-repeat;
  opacity: 0.35;
}
.hero--visual .container { position: relative; z-index: 1; }
.hero--visual h1,
.hero--visual .hero-lead { color: var(--color-white); }
.hero--visual .btn-outline {
  color: var(--color-white);
  border-color: var(--color-white);
}
.hero--visual .btn-outline:hover {
  background: var(--color-white);
  color: var(--color-ink);
}
.hero--visual .meta-card {
  background: rgba(15, 17, 23, 0.75);
  border-left-color: var(--color-gold);
}
.hero--visual .meta-card p { color: rgba(255,255,255,0.85); }
.hero--visual .meta-card h3 { color: var(--color-gold-light); }
.hero--visual .meta-stat { color: var(--color-white); }

/* Partner logos — real images */
.partner-logo {
  width: 120px;
  height: 72px;
  padding: 0.5rem;
  background: var(--color-white);
  border-radius: 4px;
}
.partner-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.75;
  transition: filter var(--transition), opacity var(--transition);
}
.partner-item:hover .partner-logo img {
  filter: grayscale(0%);
  opacity: 1;
}

/* Innovation image block */
.innovation-visual {
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
}
.innovation-visual img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

/* Publication filters */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 2rem 0;
}
.filter-btn {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  border: 2px solid var(--color-border);
  background: var(--color-paper);
  color: var(--color-slate);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-gold);
  color: var(--color-ink);
  background: var(--color-white);
}

.pub-section { margin-bottom: 3rem; }
.pub-section h2 {
  font-size: 1.125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-gold);
  margin-bottom: 1.5rem;
}
.pub-list { list-style: none; padding: 0; margin: 0; }
.pub-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}
.pub-list li:last-child { border-bottom: none; }
.pub-list .pub-title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0 0 0.35rem;
  line-height: 1.45;
}
.pub-list .pub-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-teal);
  margin: 0 0 0.35rem;
}
.pub-list .pub-authors {
  font-size: 0.9rem;
  margin: 0;
  max-width: none;
  opacity: 0.85;
}
.pub-list .pub-link {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.5rem;
  display: inline-block;
}
.pub-item[data-hidden="true"] { display: none; }

/* Demonstrator cards */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2.5rem 0;
}
.demo-card {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition), transform var(--transition);
}
.demo-card:hover {
  border-color: var(--color-gold);
  transform: translateY(-3px);
}
.demo-icon {
  width: 48px;
  height: 48px;
}
.demo-card h3 { margin: 0; }
.demo-card p { margin: 0; max-width: none; font-size: 0.95rem; }
.demo-partner {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-teal);
  margin-top: auto;
  padding-top: 0.5rem;
}

@media (max-width: 900px) {
  .demo-grid { grid-template-columns: 1fr; }
}

/* Milestone timeline */
.milestone-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0;
  border-left: 2px solid var(--color-gold);
}
.milestone-list li {
  position: relative;
  padding: 0 0 2rem 1.75rem;
  max-width: 65ch;
}
.milestone-list li::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 0.4rem;
  width: 10px;
  height: 10px;
  background: var(--color-gold);
  border-radius: 50%;
}
.milestone-list li:last-child { padding-bottom: 0; }
.milestone-list strong {
  font-family: var(--font-sans);
  display: block;
  color: var(--color-ink);
  margin-bottom: 0.25rem;
}

/* Architecture diagram */
.arch-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
  margin: 2.5rem 0;
  padding: 2rem;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
}
.arch-box {
  padding: 1.25rem;
  border: 2px solid var(--color-border);
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
}
.arch-box.classic { border-color: var(--color-slate); }
.arch-box.hybrid { border-color: var(--color-gold); background: rgba(201,162,39,0.08); }
.arch-box.pqc { border-color: var(--color-teal); }
.arch-arrow {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-gold);
}

@media (max-width: 768px) {
  .arch-diagram { grid-template-columns: 1fr; }
  .arch-arrow { transform: rotate(90deg); text-align: center; }
}

/* Patent disclaimer */
.disclaimer-banner {
  background: rgba(214, 69, 69, 0.08);
  border: 2px solid var(--color-signal);
  border-left-width: 6px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
  font-size: 0.95rem;
}
.disclaimer-banner strong {
  font-family: var(--font-sans);
  color: var(--color-signal);
  display: block;
  margin-bottom: 0.35rem;
}

.patent-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  margin: 1.5rem 0 2.5rem;
}
.patent-table th,
.patent-table td {
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.patent-table th {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--color-mist);
  font-weight: 600;
}
.patent-table code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--color-mist);
  padding: 0.15rem 0.4rem;
  border-radius: 2px;
}

.patent-section h2 {
  font-size: 1.35rem;
  margin-top: 2.5rem;
}
.patent-section h3 {
  font-size: 1.05rem;
  margin-top: 1.5rem;
  color: var(--color-teal);
}

/* Header search */
.header-search-form {
  display: flex;
  align-items: center;
}
.header-search-form input {
  width: 0;
  opacity: 0;
  padding: 0;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  transition: width var(--transition), opacity var(--transition), padding var(--transition);
  background: transparent;
}
.header-search-form:focus-within input,
.header-search-form input:not(:placeholder-shown) {
  width: 140px;
  opacity: 1;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 2px;
}
.header-search-form button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.35rem;
  color: var(--color-slate);
  display: flex;
  align-items: center;
}
.header-search-form button:hover { color: var(--color-ink); }
.header-search-form button svg { width: 18px; height: 18px; }

/* Search page */
.search-page-form {
  display: flex;
  gap: 0.75rem;
  margin: 2rem 0;
  max-width: 640px;
}
.search-page-form input {
  flex: 1;
  padding: 0.85rem 1rem;
  font-family: var(--font-serif);
  font-size: 1rem;
  border: 2px solid var(--color-border);
  border-radius: 2px;
}
.search-page-form input:focus {
  outline: none;
  border-color: var(--color-gold);
}
.search-count {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-teal);
  margin-bottom: 1.5rem;
}
.search-result {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
}
.search-result h2 {
  font-size: 1.125rem;
  margin: 0 0 0.35rem;
}
.search-result h2 a {
  text-decoration: none;
  color: var(--color-ink);
}
.search-result h2 a:hover { color: var(--color-teal); }
.search-result p {
  margin: 0;
  font-size: 0.95rem;
  max-width: none;
}
.search-empty {
  color: var(--color-slate);
  font-style: italic;
}