@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  color-scheme: dark;
  --bg: #000000;
  --bg-elevated: #0a0a0a;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-border: rgba(255, 255, 255, 0.1);
  --text: #f5f5f5;
  --text-muted: #8a8a8a;
  --text-dim: #5a5a5a;
  --accent: #ededed;
  --line: rgba(255, 255, 255, 0.14);
  --glow: rgba(255, 255, 255, 0.06);
  --font: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

/* ── Layout ── */
.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* ── Header ── */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  padding: 1.25rem 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.92) 0%, transparent 100%);
  backdrop-filter: blur(8px);
}

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

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

.brand-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.brand-text {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.38em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav a {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  transition: color 180ms ease, background 180ms ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.section-alt {
  background: var(--bg-elevated);
  border-block: 1px solid var(--surface-border);
}

.section-cta {
  margin-top: 2.5rem;
  text-align: center;
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero-inner {
  padding: 8rem 0 4rem;
  max-width: 40rem;
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 300;
  letter-spacing: 0.12em;
  line-height: 1.1;
  margin: 0 0 1.5rem;
  text-transform: uppercase;
}

.hero-desc {
  max-width: 28rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-keywords {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin-bottom: 2.5rem;
}

.hero-keywords span {
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 600;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--text);
}

.hero-event {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: 0.85rem 1.2rem;
  border-radius: 4px;
}

.hero-event-date {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  background: var(--text);
  color: var(--bg);
  padding: 0.35rem 0.55rem;
  font-weight: 500;
}

.hero-event-loc {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ── Avatar slot (PNG placeholder) ── */
.avatar-slot {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.avatar-slot.is-empty .avatar-img {
  display: none;
}

.avatar-slot:not(.is-empty) .avatar-placeholder-label {
  display: none;
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.avatar-placeholder-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* ── Sections ── */
section {
  padding: 6rem 0;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 1.5rem;
  line-height: 1.2;
}

.section-desc {
  max-width: 36rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 3rem;
}

/* ── Process cards ── */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--surface-border);
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  overflow: hidden;
}

.process-card {
  background: var(--bg);
  padding: 2.5rem 2rem;
  position: relative;
}

.process-card::before {
  content: attr(data-step);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  display: block;
  margin-bottom: 1.25rem;
}

.process-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}

.process-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

/* ── QR Flow ── */
.qr-flow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.qr-flow-visual {
  position: relative;
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 3rem;
  background: radial-gradient(circle at 50% 40%, var(--glow), transparent 70%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.qr-sample {
  background: #fff;
  padding: 0.75rem;
  border-radius: 6px;
}

.qr-sample canvas,
.qr-sample img {
  display: block;
  width: 120px;
  height: 120px;
}

.qr-flow-steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.qr-step {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.qr-step-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  flex-shrink: 0;
  padding-top: 0.15rem;
}

.qr-step h4 {
  margin: 0 0 0.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.qr-step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.qr-flow-steps--standalone {
  max-width: 36rem;
}

.subject-note {
  margin: 0 0 2rem;
  padding: 1rem 1.2rem;
  border-left: 2px solid var(--line);
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

.subject-ethics-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.5rem;
}

/* ── Ethics page ── */
.ethics-page {
  padding: 7rem 0 4rem;
  max-width: 720px;
}

.ethics-blocks {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.ethics-block h2 {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.ethics-block p {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.75;
}

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

.ethics-block ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.75;
}

.ethics-block li + li {
  margin-top: 0.5rem;
}

.ethics-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.section-desc--flush {
  margin-bottom: 0;
}

.site-footer--compact {
  margin-top: 0;
  border-top: 1px solid var(--surface-border);
}

.footer-link {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 180ms ease;
}

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

/* ── Subjects grid ── */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.subject-card {
  display: block;
  color: inherit;
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-elevated);
  transition: border-color 200ms ease, transform 200ms ease;
}

.subject-card:hover {
  border-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-3px);
}

.subject-card-preview {
  aspect-ratio: 3 / 4;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.subject-card-preview::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.015) 0,
    rgba(255, 255, 255, 0.015) 1px,
    transparent 1px,
    transparent 48px
  );
  pointer-events: none;
}

.subject-card-preview .avatar-slot {
  width: 70%;
  border: none;
  background: transparent;
}

.subject-card-body {
  padding: 1.25rem;
}

.subject-card-id {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}

.subject-card-mood {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.subject-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.15rem;
  transition: border-color 180ms ease;
}

.subject-card-link:hover {
  border-color: var(--text);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--surface-border);
  padding: 3rem 0;
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-brand {
  font-size: 0.68rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.footer-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  max-width: 28rem;
  text-align: right;
}

/* ── Subject page ── */
.subject-page {
  padding-top: 6rem;
  min-height: 100vh;
}

.subject-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  padding-bottom: 4rem;
}

.subject-portrait-wrap {
  position: sticky;
  top: 6rem;
  border: 1px solid var(--surface-border);
  border-radius: 14px;
  background: radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.03), transparent 60%);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.subject-portrait-wrap .avatar-slot {
  width: min(100%, 320px);
}

.subject-meta-block {
  width: 100%;
  display: grid;
  gap: 0.5rem;
}

.subject-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  padding: 0.55rem 0.75rem;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 6px;
}

.subject-meta-row span:first-child {
  color: var(--text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.68rem;
}

.subject-meta-row span:last-child {
  font-family: var(--mono);
  font-size: 0.72rem;
}

.subject-content h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 0.5rem;
}

.subject-subtitle {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
}

.why-block {
  margin-bottom: 2.5rem;
}

.why-block h2 {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.why-block p {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text);
  font-weight: 300;
}

.analysis-block {
  margin-bottom: 2.5rem;
}

.analysis-block h2 {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.analysis-block p {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.palette-item {
  text-align: center;
}

.palette-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 0.5rem;
}

.palette-label {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: block;
}

.palette-hex {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.traits-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.trait-tag {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  color: var(--text-muted);
}

.qr-share-block {
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 2rem;
  display: flex;
  gap: 2rem;
  align-items: center;
  background: var(--surface);
}

.qr-share-block canvas,
.qr-share-block img {
  width: 140px;
  height: 140px;
  background: #fff;
  padding: 0.5rem;
  border-radius: 6px;
  flex-shrink: 0;
}

.qr-share-text h3 {
  margin: 0 0 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.qr-share-text p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2rem;
  transition: color 180ms ease;
}

.back-link:hover {
  color: var(--text);
}

/* ── Subjects index QR page ── */
.qr-gallery {
  padding-top: 7rem;
  padding-bottom: 4rem;
}

.qr-gallery-header {
  margin-bottom: 3rem;
}

.qr-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.qr-card {
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  background: var(--bg-elevated);
}

.qr-card canvas,
.qr-card img {
  margin: 0 auto 1.25rem;
  background: #fff;
  padding: 0.6rem;
  border-radius: 6px;
}

.qr-card-id {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  margin-bottom: 0.35rem;
}

.qr-card-url {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-dim);
  word-break: break-all;
  margin-bottom: 1rem;
}

.qr-card-link {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--line);
}

.not-found {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1rem;
}

.not-found h1 {
  font-size: 1.4rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.not-found p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.75rem 1.4rem;
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.btn-primary:hover {
  background: #ddd;
  border-color: #ddd;
}

/* ── Minimal home ── */
.home-minimal {
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 4rem 1.25rem 5rem;
}

.home-minimal-inner {
  width: min(42rem, 100%);
}

.home-minimal-brand {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 2rem;
}

.home-minimal-title {
  font-size: clamp(1.8rem, 5vw, 2.75rem);
  font-weight: 300;
  letter-spacing: 0.04em;
  line-height: 1.2;
  margin: 0 0 2rem;
}

.home-minimal-text {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.home-minimal-text p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.home-minimal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ── FAQ ── */
.faq {
  margin-bottom: 2.5rem;
  padding-top: 0.5rem;
}

.faq-heading {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 0.5rem;
}

.faq-intro {
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.faq-list {
  display: grid;
  gap: 0.5rem;
}

.faq-item {
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  background: var(--bg-elevated);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.15rem;
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background 180ms ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-dim);
  flex-shrink: 0;
  transition: transform 180ms ease;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background: rgba(255, 255, 255, 0.03);
}

.faq-item p {
  margin: 0;
  padding: 0 1.15rem 1.15rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.faq-item p strong {
  color: var(--text);
  font-weight: 500;
}

/* ── Subjects page ── */
.subjects-page {
  padding-top: 7rem;
  padding-bottom: 4rem;
}

.subjects-page-header {
  margin-bottom: 3rem;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero {
    min-height: auto;
    padding-top: 5rem;
  }

  .hero-inner {
    padding: 2rem 0;
  }

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

  .qr-flow,
  .subject-layout {
    grid-template-columns: 1fr;
  }

  .subject-portrait-wrap {
    position: static;
  }

  .palette-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .qr-share-block {
    flex-direction: column;
    text-align: center;
  }

  .site-nav {
    display: none;
  }

  .footer-note {
    text-align: left;
  }
}