:root {
  color-scheme: dark;
  --ink: #f4f0e8;
  --muted: #b6b5ad;
  --paper: #101114;
  --panel: rgba(20, 22, 26, 0.82);
  --panel-strong: #17191f;
  --line: rgba(244, 240, 232, 0.16);
  --line-strong: rgba(244, 240, 232, 0.28);
  --cyan: #49d4ff;
  --lime: #c8f538;
  --ember: #ff4b18;
  --coral: #ff6247;
  --violet: #a88bff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 22%, rgba(73, 212, 255, 0.12), transparent 24rem),
    radial-gradient(circle at 85% 8%, rgba(255, 98, 71, 0.12), transparent 22rem),
    linear-gradient(180deg, #0b0c0f 0%, #121317 48%, #0f1013 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  min-width: 320px;
}

body::selection {
  background: var(--lime);
  color: #111;
}

a {
  color: inherit;
  text-decoration-color: rgba(73, 212, 255, 0.56);
  text-underline-offset: 0.18em;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

img {
  display: block;
  width: 100%;
}

.scroll-meter {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
}

.scroll-meter span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--lime), var(--coral));
  transition: width 120ms linear;
}

.site-header {
  position: sticky;
  top: 4px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.9rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: rgba(9, 10, 12, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.65rem;
  height: 2.65rem;
  border: 1px solid rgba(200, 245, 56, 0.42);
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(73, 212, 255, 0.2), rgba(200, 245, 56, 0.16));
  color: var(--lime);
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 0.95rem;
}

.brand small {
  color: var(--muted);
  font-size: 0.76rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2vw, 1.35rem);
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-links a {
  position: relative;
  text-decoration: none;
}

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

.nav-links a.active::after {
  position: absolute;
  right: 0;
  bottom: -0.44rem;
  left: 0;
  height: 2px;
  background: var(--lime);
  content: "";
}

.hero {
  position: relative;
  display: grid;
  align-items: center;
  min-height: min(620px, 68vh);
  overflow: clip;
  border-bottom: 1px solid var(--line);
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(8, 9, 11, 0.96) 0%, rgba(8, 9, 11, 0.82) 34%, rgba(8, 9, 11, 0.38) 64%, rgba(8, 9, 11, 0.7) 100%),
    radial-gradient(circle at 10% 44%, rgba(255, 75, 24, 0.22), transparent 17rem),
    linear-gradient(180deg, rgba(8, 9, 11, 0.06), rgba(8, 9, 11, 0.8));
}

.hero-copy {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 2rem));
  margin-left: clamp(1rem, 7vw, 6rem);
  padding: 2.5rem 0 2.8rem;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--lime);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  overflow-wrap: normal;
  line-height: 1.02;
  letter-spacing: 0;
}

h1 {
  max-width: 14ch;
  font-size: clamp(3.2rem, 8.5vw, 6.3rem);
  text-transform: uppercase;
}

h2 {
  font-size: clamp(2.15rem, 5vw, 4.6rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.7rem);
}

.creator-line {
  width: fit-content;
  margin: 0.55rem 0 0;
  border-left: 3px solid var(--ember);
  padding-left: 0.75rem;
  color: rgba(244, 240, 232, 0.9);
  font-weight: 900;
  text-transform: uppercase;
}

.hero-lede {
  max-width: 58ch;
  margin: 0.9rem 0 0;
  color: rgba(244, 240, 232, 0.86);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.hero-actions,
.button-row,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.hero-actions {
  margin-top: 1rem;
}

.button {
  display: inline-flex;
  min-height: 2.85rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 0.72rem 1rem;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  border-color: rgba(200, 245, 56, 0.7);
  background: var(--lime);
  color: #111317;
}

.button.ghost {
  background: rgba(244, 240, 232, 0.08);
}

.button.subtle {
  background: transparent;
  color: var(--muted);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
  max-width: 720px;
  margin: 1rem 0 0;
}

.hero-stats div {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.8rem;
  background: rgba(16, 17, 20, 0.72);
  backdrop-filter: blur(10px);
}

.hero-stats dt {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.hero-stats dd {
  margin: 0.16rem 0 0;
  color: var(--ink);
  font-weight: 800;
}

.section {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 7rem) 0;
}

.intro-band {
  margin-top: 0;
  padding-top: clamp(1.3rem, 3vw, 2.2rem);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.section-heading p:not(.eyebrow) {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.intro-grid,
.terrain-grid,
.research-list {
  display: grid;
  gap: 1rem;
}

.intro-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.signal-card,
.session-output,
.builder-controls,
.control-panel,
.research-item,
.terrain-response,
.safety-check,
.medical-note,
.readiness-output,
.contact-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.signal-card {
  min-height: 13rem;
  padding: 1.1rem;
}

.signal-card span {
  color: var(--cyan);
  font-weight: 900;
}

.signal-card h3 {
  margin-top: 2.2rem;
}

.signal-card p,
.research-item p,
.terrain-response,
.medical-note,
.readiness-output,
.contact-copy p,
.session-summary p {
  color: var(--muted);
}

.cover-section {
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(1.3rem, 4vw, 3rem);
  align-items: center;
  border-top: 1px solid var(--line);
}

.cover-art {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(73, 212, 255, 0.34);
  border-radius: 8px;
  background: #090a0d;
  box-shadow: var(--shadow);
}

.cover-art::after {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(255, 75, 24, 0.22), transparent 28%),
    linear-gradient(300deg, rgba(73, 212, 255, 0.24), transparent 32%);
  content: "";
  pointer-events: none;
  mix-blend-mode: screen;
}

.cover-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.06rem;
}

.project-domain {
  margin-top: 1.2rem;
  border: 1px solid rgba(255, 75, 24, 0.38);
  border-radius: 8px;
  padding: 1rem;
  background:
    linear-gradient(90deg, rgba(255, 75, 24, 0.12), rgba(73, 212, 255, 0.08)),
    rgba(20, 22, 26, 0.72);
}

.project-domain span,
.project-domain strong {
  display: block;
}

.project-domain span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.project-domain strong {
  margin-top: 0.2rem;
  color: var(--ink);
  font-size: clamp(1.1rem, 2.4vw, 1.65rem);
  overflow-wrap: anywhere;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(340px, 1.15fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.tuner {
  display: grid;
  gap: 1rem;
}

.tuner-panel {
  position: relative;
  min-height: 320px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(73, 212, 255, 0.12), rgba(168, 139, 255, 0.08)),
    #101114;
  box-shadow: var(--shadow);
}

#frequencyCanvas {
  display: block;
  width: 100%;
  height: 320px;
}

.frequency-readout {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.frequency-readout strong {
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 0.9;
}

.frequency-readout span {
  color: var(--lime);
  font-weight: 900;
}

.control-panel,
.builder-controls {
  display: grid;
  gap: 1rem;
  padding: 1rem;
}

label,
legend {
  color: var(--ink);
  font-weight: 800;
}

label output {
  float: right;
  color: var(--lime);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--lime);
}

.protocol-section {
  border-top: 1px solid var(--line);
}

.builder-layout {
  display: grid;
  grid-template-columns: minmax(270px, 380px) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.toggle-grid {
  display: grid;
  gap: 0.7rem;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.9rem;
}

.toggle-grid label,
.safety-check label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
}

.toggle-grid input,
.safety-check input {
  accent-color: var(--cyan);
}

.session-output {
  overflow: hidden;
}

.session-summary {
  padding: 1rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(73, 212, 255, 0.12), rgba(255, 98, 71, 0.08));
}

.session-summary span {
  color: var(--lime);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.session-summary strong {
  display: block;
  margin-top: 0.3rem;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.timeline {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr) 8rem;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
}

.timeline li:last-child {
  border-bottom: 0;
}

.timeline span {
  color: var(--muted);
  font-size: 0.86rem;
}

.timeline strong {
  color: var(--ink);
}

.timeline meter {
  width: 100%;
  height: 0.8rem;
  accent-color: var(--cyan);
}

.terrain-section {
  border-top: 1px solid var(--line);
}

.terrain-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.terrain-step {
  min-height: 11rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  background: rgba(23, 25, 31, 0.82);
  color: var(--ink);
  text-align: left;
  transition: border-color 180ms ease, transform 180ms ease, background 180ms ease;
}

.terrain-step:hover,
.terrain-step.active {
  transform: translateY(-2px);
  border-color: rgba(200, 245, 56, 0.72);
  background: linear-gradient(135deg, rgba(200, 245, 56, 0.12), rgba(73, 212, 255, 0.08));
}

.terrain-step span,
.terrain-step strong,
.terrain-step small {
  display: block;
}

.terrain-step span {
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.terrain-step strong {
  margin-top: 1.6rem;
  font-size: 1.5rem;
  line-height: 1.1;
}

.terrain-step small {
  margin-top: 0.8rem;
  color: var(--muted);
}

.terrain-response {
  margin-top: 1rem;
  padding: 1rem;
}

.reset-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 1.5rem;
  align-items: center;
  border-top: 1px solid var(--line);
}

.reset-tool {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
}

.breath-ring {
  display: grid;
  place-items: center;
  width: 220px;
  aspect-ratio: 1;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background:
    radial-gradient(circle at center, rgba(200, 245, 56, 0.1) 0 40%, transparent 41%),
    conic-gradient(from 0deg, var(--cyan), var(--lime), var(--coral), var(--cyan));
  box-shadow: var(--shadow);
  transition: transform 550ms ease;
}

.breath-ring.running {
  transform: scale(1.04);
}

.breath-ring span,
.breath-ring strong {
  grid-area: 1 / 1;
}

.breath-ring span {
  align-self: start;
  margin-top: 3.4rem;
  color: #111317;
  font-weight: 900;
}

.breath-ring strong {
  color: #111317;
  font-size: 4.8rem;
  line-height: 1;
}

.reset-copy {
  min-width: 0;
}

.reset-copy p {
  color: var(--ink);
  font-size: clamp(1.25rem, 2.8vw, 2rem);
  font-weight: 900;
  line-height: 1.12;
}

.research-section,
.safety-section {
  border-top: 1px solid var(--line);
}

.research-list {
  grid-template-columns: 1fr;
}

.research-item {
  overflow: hidden;
}

.research-item button {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  width: 100%;
  border: 0;
  padding: 1rem;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.research-item button span {
  font-size: 1.15rem;
  font-weight: 900;
}

.research-item button strong {
  color: var(--cyan);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.research-item p {
  display: none;
  margin: 0;
  padding: 0 1rem 1rem;
}

.research-item.open {
  border-color: rgba(73, 212, 255, 0.52);
}

.research-item.open p {
  display: block;
}

.source-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.source-list a {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.5rem 0.68rem;
  background: rgba(244, 240, 232, 0.05);
  color: var(--muted);
  font-size: 0.86rem;
  text-decoration: none;
}

.source-list a:hover {
  border-color: var(--cyan);
  color: var(--ink);
}

.safety-check {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
  padding: 1rem;
}

.readiness-output,
.medical-note {
  margin: 1rem 0 0;
  padding: 1rem;
}

.medical-note {
  border-color: rgba(255, 98, 71, 0.38);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: center;
  padding: clamp(1.2rem, 4vw, 2rem);
}

.contact-copy h2 {
  font-size: clamp(2rem, 4vw, 3.7rem);
}

.contact-copy p {
  max-width: 67ch;
}

#copyStatus {
  min-width: 7rem;
  color: var(--lime);
  font-weight: 900;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 980px) {
  .split-section,
  .cover-section,
  .builder-layout,
  .reset-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .intro-grid,
  .terrain-grid,
  .safety-check {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-actions {
    justify-content: start;
  }
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .hero {
    min-height: 70vh;
  }

  .hero-copy {
    width: min(100% - 2rem, 640px);
    margin: 0 auto;
    padding: 3.75rem 0 4rem;
  }

  h1 {
    font-size: clamp(2.5rem, 11.7vw, 3rem);
  }

  .creator-line {
    font-size: 0.78rem;
  }

  .intro-grid,
  .terrain-grid,
  .safety-check,
  .reset-tool {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.45rem;
  }

  .hero-stats div {
    padding: 0.55rem;
  }

  .hero-stats dt {
    font-size: 0.62rem;
  }

  .hero-stats dd {
    font-size: 0.86rem;
    line-height: 1.2;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .breath-ring {
    width: min(220px, 72vw);
    justify-self: center;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}