/* ═══════════════════════════════════════════
   fritz.typelabs.ai — Dark Laboratory Theme
   ═══════════════════════════════════════════ */

/* ── Tokens ── */
:root {
  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'JetBrains Mono', 'Courier New', monospace;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* Dark laboratory palette */
  --color-bg:           #0a0b0f;
  --color-surface:      #0f1117;
  --color-surface-2:    #141620;
  --color-surface-3:    #1a1d2a;
  --color-border:       rgba(56, 136, 255, 0.12);
  --color-border-hover: rgba(56, 136, 255, 0.25);
  --color-text:         #c8cdd8;
  --color-text-muted:   #6b7280;
  --color-text-faint:   #3d4555;

  /* Electric blue accent */
  --accent:             #3888ff;
  --accent-bright:      #5ea0ff;
  --accent-dim:         #1a3a6e;
  --accent-glow:        rgba(56, 136, 255, 0.15);
  --accent-glow-strong: rgba(56, 136, 255, 0.3);

  /* Status colors */
  --status-active:  #22c55e;
  --status-research: #eab308;
  --status-concept: #8b5cf6;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(56, 136, 255, 0.08);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}


/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

@media (max-width: 640px) {
  .container { padding-inline: var(--space-4); }
}


/* ── Canvas Background ── */
#electricity-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}


/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 11, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark { color: var(--accent); flex-shrink: 0; }

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.logo-dot { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color var(--transition-interactive);
}

.nav-link:hover { color: var(--accent-bright); }

.nav-link--external { color: var(--accent); }
.nav-link--external:hover { color: var(--accent-bright); }

.mobile-menu-btn { display: none; }
.mobile-nav { display: none; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    position: relative;
  }
  .hamburger,
  .hamburger::before,
  .hamburger::after {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
  }
  .hamburger { position: relative; }
  .hamburger::before,
  .hamburger::after {
    content: '';
    position: absolute;
    left: 0;
  }
  .hamburger::before { top: -6px; }
  .hamburger::after { top: 6px; }

  .mobile-menu-btn[aria-expanded="true"] .hamburger { background: transparent; }
  .mobile-menu-btn[aria-expanded="true"] .hamburger::before { top: 0; transform: rotate(45deg); }
  .mobile-menu-btn[aria-expanded="true"] .hamburger::after { top: 0; transform: rotate(-45deg); }

  .mobile-nav {
    display: none;
    flex-direction: column;
    gap: 0;
    background: rgba(10, 11, 15, 0.95);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) var(--space-6) var(--space-6);
  }
  .mobile-nav.is-open {
    display: flex;
  }
  .mobile-nav-link {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    transition: color var(--transition-interactive);
  }
  .mobile-nav-link:last-child { border-bottom: none; }
  .mobile-nav-link:hover { color: var(--accent-bright); }
}


/* ── Hero ── */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-6);
  overflow: hidden;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  max-width: var(--content-wide);
  margin: 0 auto;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  text-align: left;
  flex: 1;
}

@media (max-width: 900px) {
  .hero {
    flex-direction: column-reverse;
    text-align: center;
    min-height: auto;
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }
  .hero-content { text-align: center; max-width: 100%; }
  .hero-words { justify-content: center; }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4) var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-8);
  background: var(--accent-glow);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 4px var(--accent); }
  50% { opacity: 0.5; box-shadow: 0 0 8px var(--accent); }
}

.badge-text {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--accent-bright);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: #e8ecf4;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-8);
}

.hero-subtext {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  max-width: 540px;
  line-height: 1.5;
}

.hero-words {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.hero-word {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--accent);
  opacity: 0;
  animation: word-appear 0.6s var(--ease-out) forwards;
}

.hero-word[data-delay="0"] { animation-delay: 0.3s; }
.hero-word[data-delay="1"] { animation-delay: 0.5s; }
.hero-word[data-delay="2"] { animation-delay: 0.7s; }
.hero-word[data-delay="3"] { animation-delay: 0.9s; }

@keyframes word-appear {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-closer {
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-10);
  font-style: italic;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

.hero-cta:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.hero-cta:active { transform: translateY(0); }

.hero-cta svg {
  animation: bounce-down 2s ease-in-out infinite;
}

@keyframes bounce-down {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(3px); }
}

/* Hero Fritz portrait */
.hero-fritz {
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}

.hero-fritz-frame {
  position: relative;
  width: clamp(280px, 30vw, 440px);
  height: clamp(280px, 30vw, 440px);
}

.hero-fritz-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-hover);
}

.hero-fritz-glow {
  position: absolute;
  inset: -8px;
  border-radius: calc(var(--radius-lg) + 4px);
  background: radial-gradient(ellipse at center, rgba(56, 136, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

@media (max-width: 900px) {
  .hero-fritz-frame {
    width: clamp(220px, 60vw, 320px);
    height: clamp(220px, 60vw, 320px);
  }
}


/* ── Core Message ── */
.core-message {
  position: relative;
  z-index: 1;
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}

.core-quote {
  max-width: var(--content-default);
  margin: 0 auto var(--space-12);
  text-align: center;
}

.core-quote p {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: #e8ecf4;
  max-width: none;
  line-height: 1.4;
}

.core-story {
  max-width: var(--content-narrow);
  margin: 0 auto;
  text-align: center;
}

.core-story p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  max-width: none;
}

.core-emphasis {
  color: var(--accent) !important;
  font-weight: 500;
  margin-top: var(--space-6) !important;
}


/* ── Sections shared ── */
.section-header {
  margin-bottom: var(--space-12);
}

.section-label {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: #e8ecf4;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 560px;
}


/* ── Experiments ── */
.experiments {
  position: relative;
  z-index: 1;
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
}

.experiment-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

@media (max-width: 900px) {
  .experiment-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.experiment-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

a.experiment-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

a.experiment-card:active { transform: translateY(0); }

.experiment-card--featured {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--color-surface-2) 0%, var(--color-surface) 100%);
  border-color: var(--color-border-hover);
}

@media (max-width: 600px) {
  .experiment-card--featured { grid-column: span 1; }
}

.card-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot--active { background: var(--status-active); box-shadow: 0 0 6px var(--status-active); }
.status-dot--research { background: var(--status-research); box-shadow: 0 0 6px var(--status-research); }
.status-dot--concept { background: var(--status-concept); box-shadow: 0 0 6px var(--status-concept); }

.status-text {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-id {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: #e8ecf4;
  margin-bottom: var(--space-3);
}

.card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--accent);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-arrow {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: var(--text-lg);
  color: var(--accent);
  opacity: 0;
  transition: opacity var(--transition-interactive);
}

a.experiment-card:hover .card-arrow { opacity: 1; }

.experiment-card--placeholder {
  border-style: dashed;
  border-color: var(--color-text-faint);
  background: transparent;
  justify-content: center;
  align-items: center;
  text-align: center;
  min-height: 200px;
}

.experiment-card--placeholder .card-id {
  margin-bottom: var(--space-3);
}

.experiment-card--placeholder .card-title {
  color: var(--color-text-muted);
}

.experiment-card--placeholder .card-desc {
  color: var(--color-text-faint);
  max-width: 200px;
  margin-left: auto;
  margin-right: auto;
}

.card-plus {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
}


/* ── Lessons ── */
.lessons {
  position: relative;
  z-index: 1;
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  border-top: 1px solid var(--color-border);
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 50%, var(--color-bg) 100%);
}

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

@media (max-width: 700px) {
  .lessons-grid { grid-template-columns: 1fr; }
}

.lesson-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.lesson-number {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--accent-dim);
  line-height: 1;
  margin-bottom: var(--space-4);
}

.lesson-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: #e8ecf4;
  margin-bottom: var(--space-4);
}

.lesson-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.lesson-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--accent);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}


/* ── Village ── */
.village {
  position: relative;
  z-index: 1;
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  border-top: 1px solid var(--color-border);
}

.village-layout {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: var(--space-16);
  align-items: center;
}

@media (max-width: 800px) {
  .village-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.village-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.village-links {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-8);
  flex-wrap: wrap;
}

.village-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

.village-btn--primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

.village-btn--primary:hover {
  background: var(--accent-bright);
  box-shadow: 0 0 20px rgba(56, 136, 255, 0.3);
  transform: translateY(-1px);
}

.village-btn--primary:active { transform: translateY(0); }

.village-btn--secondary {
  color: var(--accent);
  border: 1px solid var(--color-border-hover);
  background: transparent;
}

.village-btn--secondary:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.village-btn--secondary:active { transform: translateY(0); }

/* Flask animation */
.flask-container {
  display: flex;
  justify-content: center;
}

.flask-svg {
  width: 200px;
  height: auto;
}

.bubble {
  animation: float-up 3s ease-in-out infinite;
}

.b1 { animation-delay: 0s; }
.b2 { animation-delay: 0.8s; }
.b3 { animation-delay: 1.5s; }
.b4 { animation-delay: 2.2s; }

@keyframes float-up {
  0% { transform: translateY(0); opacity: 0.3; }
  50% { opacity: 0.15; }
  100% { transform: translateY(-30px); opacity: 0; }
}


/* ── Footer ── */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-border);
  padding: var(--space-16) 0 var(--space-8);
  background: var(--color-surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

@media (max-width: 700px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.footer-logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  display: block;
  margin-bottom: var(--space-3);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-heading {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-4);
}

.footer-links-col a {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: var(--space-3);
  transition: color var(--transition-interactive);
}

.footer-links-col a:hover { color: var(--accent-bright); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-attribution {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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


/* ── Scroll Reveal ── */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}


/* ── Scanline overlay (subtle) ── */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 99;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
}