/* ============================================================
   THE KUIPER STRAIN — Website Stylesheet
   Dark cinematic theme with amber/gold pathogen accents
   ============================================================ */

/* --- Custom Properties --- */
:root {
  --color-bg:          #0a0a0f;
  --color-bg-subtle:   #0f0f18;
  --color-bg-card:     #12121c;
  --color-bg-card-hover: #181826;
  --color-surface:     #1a1a28;
  --color-border:      #252535;
  --color-border-glow: rgba(204, 153, 51, 0.15);

  --color-text:        #c8c8d4;
  --color-text-muted:  #7a7a8e;
  --color-text-bright: #e8e8f0;
  --color-heading:     #f0ece4;

  --color-amber:       #cc9933;
  --color-amber-light: #e6b844;
  --color-amber-dim:   #8a6622;
  --color-amber-glow:  rgba(204, 153, 51, 0.25);
  --color-amber-deep:  #4d3310;

  --color-red:         #993333;
  --color-blue-dim:    #334466;
  --color-green-dim:   #2a4a2a;

  --font-display:      'Cinzel', Georgia, 'Times New Roman', serif;
  --font-heading:      'Rajdhani', 'Segoe UI', system-ui, sans-serif;
  --font-body:         'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono:         'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --max-width:         1200px;
  --section-padding:   6rem 2rem;
  --card-radius:       4px;
  --transition-base:   0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection {
  background: var(--color-amber-deep);
  color: var(--color-amber-light);
}

img { max-width: 100%; display: block; }
a   { color: var(--color-amber); text-decoration: none; transition: color var(--transition-base); }
a:hover { color: var(--color-amber-light); }

/* --- Typography --- */
h1, h2, h3, h4 { color: var(--color-heading); line-height: 1.2; }

h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-amber);
}

/* --- Navigation --- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.site-nav.scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(10, 10, 15, 0.95);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-amber);
  font-weight: 700;
}

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

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-amber);
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-muted);
  margin: 5px 0;
  transition: var(--transition-base);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  overflow: hidden;
}

.hero-starfield {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-starfield canvas {
  width: 100%;
  height: 100%;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 0%, var(--color-bg) 70%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(0.85rem, 1.5vw, 1.1rem);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-amber-dim);
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
  background: linear-gradient(180deg, var(--color-heading) 40%, var(--color-amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-amber);
  border: 1px solid var(--color-amber-dim);
  padding: 0.85rem 2rem;
  border-radius: 2px;
  transition: all var(--transition-base);
  cursor: pointer;
  background: transparent;
}

.hero-cta:hover {
  background: var(--color-amber-glow);
  border-color: var(--color-amber);
  color: var(--color-amber-light);
  box-shadow: 0 0 30px var(--color-amber-glow);
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: float 3s ease-in-out infinite;
}

.scroll-indicator svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-text-muted);
  opacity: 0.4;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(8px); }
}

/* --- Section Layout --- */
.section {
  padding: var(--section-padding);
  position: relative;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

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

.section-header p {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  font-size: 0.95rem;
}

.section-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-divider .line {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-amber-dim), transparent);
}

.section-divider .diamond {
  width: 8px;
  height: 8px;
  background: var(--color-amber-dim);
  transform: rotate(45deg);
}

/* --- Synopsis Section --- */
.synopsis {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-subtle) 50%, var(--color-bg) 100%);
}

.synopsis-text {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.synopsis-text p {
  font-size: 1.1rem;
  line-height: 1.9;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.synopsis-text p:first-of-type::first-line {
  color: var(--color-text-bright);
}

.synopsis-pullquote {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-amber);
  font-style: italic;
  border-left: 2px solid var(--color-amber-dim);
  padding-left: 1.5rem;
  margin: 2.5rem auto;
  max-width: 560px;
  text-align: left;
  line-height: 1.8;
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  gap: 1.5rem;
}

.card-grid.cols-3 {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.card-grid.cols-2 {
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
}

/* --- Character Cards --- */
.char-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.char-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-amber-dim), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.char-card:hover {
  border-color: var(--color-border-glow);
  background: var(--color-bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--color-border-glow);
}

.char-card:hover::before {
  opacity: 1;
}

.char-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.char-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-amber-dim);
  letter-spacing: 0.05em;
}

.char-card-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-heading);
}

.char-card-role {
  font-size: 0.78rem;
  color: var(--color-amber-dim);
  font-family: var(--font-heading);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.char-card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  margin-top: 1rem;
}

.char-card-traits {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.char-card-trait {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-amber-dim);
  background: rgba(204, 153, 51, 0.06);
  border: 1px solid rgba(204, 153, 51, 0.12);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
}

.char-card-tag.deceased {
  color: var(--color-red);
  border-color: rgba(153, 51, 51, 0.3);
}

.char-card-tag.ship-lost {
  color: var(--color-red);
  border-color: rgba(153, 51, 51, 0.3);
}

/* --- Ship Cards --- */
.ship-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
}

.ship-card:hover {
  border-color: var(--color-border-glow);
  background: var(--color-bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.ship-card-designation {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-amber-dim);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.ship-card h3 {
  margin-bottom: 0.3rem;
}

.ship-card-type {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-family: var(--font-heading);
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.ship-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.ship-card-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.active  { background: #44aa44; box-shadow: 0 0 6px rgba(68, 170, 68, 0.5); }
.status-dot.caution { background: var(--color-amber); box-shadow: 0 0 6px var(--color-amber-glow); }
.status-dot.danger  { background: #cc3333; box-shadow: 0 0 6px rgba(204, 51, 51, 0.5); }
.status-dot.offline { background: #555; }

/* --- Ship Subcard (nested vessel, e.g. SC-1 inside RPS-47) --- */
.ship-subcard {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.ship-subcard h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 0.3rem;
}

.ship-subcard .ship-card-desc {
  font-size: 0.85rem;
}

/* --- Technology Section --- */
.tech-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
  align-items: start;
}

.tech-block:last-child {
  margin-bottom: 0;
}

.tech-visual {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  position: relative;
  overflow: hidden;
}

.tech-visual svg {
  width: 100%;
  max-width: 300px;
  height: auto;
}

.tech-info h3 {
  font-size: 1.3rem;
  margin-bottom: 0.3rem;
}

.tech-info .tech-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  margin-bottom: 1.5rem;
}

.tech-info p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.tech-specs {
  list-style: none;
  margin-top: 1.5rem;
}

.tech-specs li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
}

.tech-specs li span:first-child {
  color: var(--color-amber-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* --- Timeline Section --- */
.timeline {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-subtle) 50%, var(--color-bg) 100%);
}

.timeline-track {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline-track::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--color-amber-dim), var(--color-amber-dim), transparent);
}

.timeline-event {
  position: relative;
  padding-left: 60px;
  padding-bottom: 3rem;
}

.timeline-event:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: 14px;
  top: 4px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-amber-dim);
  z-index: 1;
  transition: all var(--transition-base);
}

.timeline-event:hover .timeline-dot {
  background: var(--color-amber);
  border-color: var(--color-amber);
  box-shadow: 0 0 12px var(--color-amber-glow);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-amber);
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
}

.timeline-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Trilogy Section --- */
.trilogy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto;
}

.trilogy-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-base);
}

.trilogy-card.current {
  border-color: var(--color-amber-dim);
  box-shadow: 0 0 24px rgba(204, 153, 51, 0.08);
}

.trilogy-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-glow);
}

.trilogy-card-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--color-amber-dim);
  margin-bottom: 0.5rem;
  line-height: 1;
}

.trilogy-card.current .trilogy-card-number {
  color: var(--color-amber);
}

.trilogy-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.trilogy-card .trilogy-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.trilogy-card.current .trilogy-status {
  color: var(--color-amber);
}

.trilogy-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Author Section --- */
.author {
  background: var(--color-bg-subtle);
}

.author-content {
  display: flex;
  gap: 3rem;
  align-items: start;
  max-width: 800px;
  margin: 0 auto;
}

.author-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--color-amber-dim);
}

.author-text h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.author-text p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 2rem;
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-amber-dim);
  margin-bottom: 1rem;
}

.footer-text {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Fade-in Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  :root {
    --section-padding: 4rem 1.5rem;
  }

  .nav-links     { display: none; }
  .nav-toggle    { display: block; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem 2rem;
    gap: 1.2rem;
  }

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

  .tech-block:nth-child(even) .tech-visual {
    order: -1;
  }

  .trilogy-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .author-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .card-grid.cols-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .card-grid.cols-3 {
    grid-template-columns: 1fr;
  }
}