/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ── TOKENS ── */
:root {
  --bg:      #000000;
  --bg2:     #0a0a0a;
  --bg3:     #111111;
  --border:  #1e1e1e;
  --border2: #2a2a2a;
  --text:    #e8e8e8;
  --dim:     #555555;
  --dim2:    #3a3a3a;
  --mono:    'IBM Plex Mono', monospace;
  --sans:    'IBM Plex Sans', sans-serif;

  --c-natural-open:   #6ab187;
  --c-darkness:       #c0392b;
  --c-natural-closed: #a8d5b5;
  --c-purple:         #c39bd3;
  --c-circadian:      #88c9a0;
}

/* ── BASE ── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}


/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(12px);
}
.nav-left {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
}
.nav-right { display: flex; gap: 32px; }
.nav-right a {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-right a:hover { color: var(--text); }

/* ── PAGE WRAPPER ── */
.page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 48px 120px;
}

/* ── HERO — default ── */
.hero {
  padding-top: 120px;
  padding-bottom: 80px;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 64px;
  align-items: stretch;
  border-bottom: 1px solid var(--border);
}

/* ── HERO — landscape variant ── */
.hero.hero-landscape {
  grid-template-columns: 1fr;
  gap: 40px;
}
.hero-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: end;
}
.hero.hero-landscape .hero-image { position: static; }
.hero-bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.thesis-label {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.thesis-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--dim);
}

h1 {
  font-family: var(--mono);
  font-size: clamp(28px, 3.5vw, 48px);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 6px;
}
h1 em { font-style: italic; font-weight: 300; }

.subtitle {
  font-size: 13px;
  color: var(--dim);
  letter-spacing: 0.06em;
  margin-bottom: 40px;
  font-style: italic;
}

.meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border);
  margin-bottom: 40px;
}
.meta-cell {
  padding: 16px 20px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.meta-cell:nth-child(even) { border-right: none; }
.meta-cell:nth-last-child(-n+2) { border-bottom: none; }
.meta-label {
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 5px;
}
.meta-value { font-size: 12px; color: var(--text); font-style: italic; }

.description-block { margin-bottom: 32px; }
.description-block p {
  font-size: 13px;
  color: #aaaaaa;
  line-height: 1.85;
  max-width: 640px;
}

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.tag {
  font-size: 9px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 5px 12px;
  border: 1px solid var(--border2);
  color: var(--dim);
}
.tag.active { border-color: var(--dim); color: var(--text); }

/* ── HERO IMAGE ── */
.hero-image { position: sticky; top: 88px; align-self: stretch; }
.hero-image img { width: 100%; height: auto; display: block; }

/* ── IMAGE PLACEHOLDERS ── */
.img-placeholder {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--dim2);
  position: relative;
  overflow: hidden;
}
.img-placeholder svg { position: relative; z-index: 1; }
.img-placeholder span {
  position: relative;
  z-index: 1;
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-align: center;
  line-height: 1.6;
}
.img-placeholder.landscape { aspect-ratio: 4/3; }
.img-placeholder.square    { aspect-ratio: 1/1; }
.img-placeholder.wide      { aspect-ratio: 16/9; }
.img-placeholder.video-ph  { aspect-ratio: 16/9; cursor: pointer; }
.img-placeholder.video-ph .play-icon {
  width: 52px;
  height: 52px;
  border: 1px solid var(--border2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

/* ── SECTIONS ── */
section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
section.visible { opacity: 1; transform: translateY(0); }

.section-header {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 48px;
  margin-bottom: 56px;
  align-items: baseline;
}
.section-index {
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1;
}
.section-title-block h2 {
  font-size: clamp(20px, 2.5vw, 32px);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-bottom: 8px;
}
.section-title-block .section-sub {
  font-size: 11px;
  color: var(--dim);
  font-style: italic;
  letter-spacing: 0.04em;
}

/* ── CONTENT COLUMNS ── */
.content-col {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 48px;
}
.content-col .label-col {
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  padding-top: 3px;
  line-height: 2;
}
.content-col .text-col p {
  font-size: 13px;
  color: #aaaaaa;
  line-height: 1.85;
  margin-bottom: 20px;
  max-width: 780px;
}
.content-col .text-col p:last-child { margin-bottom: 0; }

/* ── CALLOUT ── */
.callout {
  border-left: 1px solid var(--border2);
  padding: 20px 28px;
  background: var(--bg3);
  margin: 32px 0;
  max-width: 780px;
}
.callout p {
  font-size: 13px;
  color: #cccccc;
  line-height: 1.85;
  font-style: italic;
}

/* ── CONDITIONS TABLE ── */
.conditions-table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  max-width: 780px;
}
.conditions-table th {
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 400;
}
.conditions-table td {
  font-size: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  color: #aaaaaa;
  vertical-align: top;
  line-height: 1.6;
}
.conditions-table tr:last-child td { border-bottom: none; }
.conditions-table td:first-child { color: var(--text); white-space: nowrap; }
.dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--dim);
  margin-right: 8px;
  vertical-align: middle;
}

/* ── SPECS GRID ── */
.specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  max-width: 780px;
  margin: 32px 0;
}
.spec-cell { background: var(--bg); padding: 20px 24px; }
.spec-label {
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 8px;
}
.spec-value { font-size: 12px; color: var(--text); line-height: 1.6; }
.spec-value em { color: var(--dim); font-style: italic; }

/* ── LOGIC GRID ── */
.logic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  max-width: 900px;
  margin-top: 8px;
}
.logic-cell { background: var(--bg); padding: 28px; }
.logic-cell p {
  font-size: 13px;
  color: #aaaaaa;
  line-height: 1.85;
  margin-bottom: 0;
}

/* ── DOCUMENTATION ── */
.doc-video { margin-bottom: 48px; max-width: 900px; }
.video-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 16px;
}
.video-item video {
  width: 100%;
  display: block;
  background: #111;
}
.video-item.video-full {
  grid-column: 1 / -1;
}
.doc-label {
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 12px;
}
.image-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  max-width: 900px;
}
.gallery-item { position: relative; overflow: hidden; }
.gallery-item .img-placeholder { border: none; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gallery-item.gallery-wide { grid-column: span 2; }
.gallery-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 10px 14px;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}

/* ── CHARTS ── */
.chart-label {
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 16px;
}
.chart-wrap {
  width: 100%;
  max-width: 900px;
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 24px;
  min-height: 340px;
}
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 20px;
  max-width: 900px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: opacity 0.2s;
  user-select: none;
}
.legend-item.hidden { opacity: 0.3; }
.legend-line { width: 20px; height: 2px; flex-shrink: 0; }
.legend-text {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}
.legend-range { font-size: 10px; color: var(--dim2); letter-spacing: 0.05em; }

.chart-bands {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 900px;
  border: 1px solid var(--border);
  border-top: none;
  background: var(--border);
  gap: 1px;
}
.chart-band { background: var(--bg); padding: 10px 14px; }
.chart-band-label {
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}
.chart-band-range { font-size: 10px; color: #666; margin-top: 3px; }

/* ── DATA STATS ── */
.data-note {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  border: 1px solid var(--border);
  padding: 12px 20px;
  margin-bottom: 32px;
}
.data-note::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--dim);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}
.mini-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  max-width: 780px;
  margin-bottom: 40px;
}
.stat-cell { background: var(--bg); padding: 24px; }
.stat-number {
  font-size: 28px;
  font-weight: 300;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-number span { font-size: 13px; color: var(--dim); font-weight: 300; }
.stat-desc {
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  line-height: 1.5;
}

/* ── FUTURE WORLD ── */
.future-quote {
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 300;
  font-style: italic;
  line-height: 1.5;
  color: var(--text);
  max-width: 680px;
  margin-bottom: 48px;
  letter-spacing: -0.01em;
}

/* ── FOOTER ── */
footer {
  padding: 48px 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.f-label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero.hero-landscape .hero-top,
  .hero.hero-landscape .hero-bottom { grid-template-columns: 1fr; }
  .hero-image { position: static; }
  .section-header,
  .content-col { grid-template-columns: 1fr; gap: 16px; }
  .meta-grid, .specs-grid, .mini-stats, .logic-grid { grid-template-columns: 1fr; }
  .image-gallery { grid-template-columns: 1fr 1fr; }
  .gallery-item.gallery-wide { grid-column: span 2; }
  .chart-bands { grid-template-columns: 1fr 1fr; }
  nav { padding: 16px 24px; }
  .page { padding: 0 24px 80px; }
}

/* ── CHART TOGGLE ── */
.chart-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  max-width: 900px;
}
.chart-top-row .chart-label { margin-bottom: 0; }
#chart-toggle {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
  background: none;
  border: 1px solid var(--border2);
  padding: 6px 14px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
#chart-toggle:hover { color: var(--text); border-color: var(--dim); }
#chart-toggle.active { color: var(--text); border-color: var(--text); }