:root {
  --bg: #07111f;
  --surface: rgba(10, 19, 34, 0.78);
  --surface-strong: rgba(12, 22, 40, 0.94);
  --surface-soft: rgba(255, 255, 255, 0.06);
  --text: #f3f7ff;
  --muted: #9fb0cb;
  --line: rgba(255, 255, 255, 0.1);
  --accent: #7cf0cf;
  --accent-strong: #32d7be;
  --accent-warm: #ffd279;
  --danger: #ff8c6b;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  --radius-lg: 24px;
  --radius-md: 18px;
}

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

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(50, 215, 190, 0.14), transparent 32%),
    linear-gradient(225deg, rgba(255, 210, 121, 0.1), transparent 28%),
    linear-gradient(180deg, #07111f 0%, #091425 48%, #050b15 100%);
  font-family: Manrope, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
}

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

button,
select,
.button {
  min-height: 44px;
  border-radius: 999px;
  font: inherit;
  font-weight: 800;
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(124, 240, 207, 0.24);
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #041117;
  cursor: pointer;
  padding: 0 20px;
  box-shadow: 0 16px 36px rgba(50, 215, 190, 0.18);
  transition: transform 180ms ease, border-color 180ms ease, filter 180ms ease;
}

button:hover,
.button:hover {
  filter: brightness(1.06);
  transform: translateY(-2px);
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  box-shadow: none;
}

select {
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  padding: 0 14px;
}

select option {
  background: #0c1728;
  color: var(--text);
}

button:focus-visible,
select:focus-visible,
.button:focus-visible {
  outline: 3px solid rgba(255, 210, 121, 0.7);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(980px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 14px 24px;
  border-bottom: 1px solid transparent;
  border-radius: 0 0 18px 18px;
  background: linear-gradient(180deg, rgba(7, 17, 31, 0.94), rgba(7, 17, 31, 0.66));
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 220px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(124, 240, 207, 0.4);
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(124, 240, 207, 0.18), rgba(255, 210, 121, 0.14));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  font-family: "Space Grotesk", Manrope, sans-serif;
  font-weight: 700;
}

.brand-copy {
  display: flex;
  flex-direction: column;
}

.brand-copy strong {
  font-family: "Space Grotesk", Manrope, sans-serif;
  font-size: 0.98rem;
  letter-spacing: 0;
}

.brand-copy span {
  color: var(--muted);
  font-size: 0.82rem;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: flex-end;
}

.site-nav a {
  position: relative;
  color: #dfe8fb;
  font-size: 0.95rem;
  font-weight: 700;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.app {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  width: min(980px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 14px 0 18px;
}

.toolbar,
.stage,
.portfolio-section,
.output {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 24, 42, 0.92), rgba(9, 16, 30, 0.82));
  box-shadow: var(--shadow);
}

.toolbar::before,
.stage::before,
.portfolio-section::before,
.output::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 38%, rgba(124, 240, 207, 0.06));
  pointer-events: none;
}

.toolbar {
  align-items: center;
  display: flex;
  gap: 18px;
  justify-content: space-between;
  min-height: 72px;
  padding: 14px 20px;
  border-radius: var(--radius-lg);
}

.eyebrow {
  position: relative;
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.toolbar h1 {
  position: relative;
  margin: 0;
  font-family: "Space Grotesk", Manrope, sans-serif;
  font-size: clamp(1.7rem, 4vw, 2.45rem);
  line-height: 1;
  letter-spacing: 0;
}

.toolbar h1::before {
  content: none;
}

.intro,
.section-heading p,
.info-card p,
.flow-list li {
  color: var(--muted);
  line-height: 1.65;
}

.intro {
  position: relative;
  max-width: 720px;
  margin: 10px 0 0;
}

.controls {
  position: relative;
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-start;
  margin: 0;
}

.angle-control {
  align-items: center;
  display: flex;
  gap: 9px;
  color: var(--muted);
  font-weight: 800;
}

.angle-control span {
  color: var(--accent-warm);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.stage {
  min-width: 0;
  padding: 18px;
  border-radius: var(--radius-lg);
}

.program-output {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.display {
  min-width: 0;
  width: 100%;
}

.output {
  min-width: 0;
}

#vertices-output {
  margin: 0;
}

canvas {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid rgba(124, 240, 207, 0.18);
  border-radius: var(--radius-md);
  background: #07111f;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0 18px 40px rgba(0, 0, 0, 0.24);
}

.output {
  padding: 14px;
  border-radius: var(--radius-lg);
}

.output-header {
  position: relative;
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 4px 2px 12px;
}

.output h2 {
  margin: 0;
  font-family: "Space Grotesk", Manrope, sans-serif;
  font-size: 1.2rem;
}

#rotation-label {
  color: var(--accent-warm);
  font-weight: 800;
}

pre {
  position: relative;
  margin: 0;
  max-height: 300px;
  overflow: auto;
  border: 1px solid rgba(124, 240, 207, 0.16);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(7, 17, 31, 0.98), rgba(6, 12, 22, 0.96));
  color: #e9f4ff;
  font-family: Consolas, "Cascadia Code", monospace;
  font-size: 14px;
  line-height: 1.55;
  padding: 16px;
  white-space: pre;
}

.portfolio-section {
  padding: 22px;
  border-radius: var(--radius-lg);
}

.section-heading {
  position: relative;
  max-width: 720px;
  margin-bottom: 18px;
}

.section-heading h2 {
  margin: 0 0 10px;
  font-family: "Space Grotesk", Manrope, sans-serif;
  font-size: clamp(1.55rem, 4vw, 2.25rem);
  line-height: 1.05;
}

.section-heading p:last-child {
  margin-bottom: 0;
}

.card-grid {
  position: relative;
  display: grid;
  gap: 14px;
}

.info-card {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  background:
    radial-gradient(circle at top right, rgba(124, 240, 207, 0.08), transparent 36%),
    rgba(255, 255, 255, 0.04);
}

.card-kicker {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--accent-warm);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.info-card h3 {
  margin: 0 0 10px;
  font-family: "Space Grotesk", Manrope, sans-serif;
  font-size: 1.15rem;
}

.info-card p {
  margin: 0;
}

.split-section {
  display: grid;
  gap: 18px;
}

.flow-list {
  position: relative;
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow-step;
}

.flow-list li {
  counter-increment: flow-step;
  position: relative;
  padding: 16px 16px 16px 58px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
}

.flow-list li::before {
  content: counter(flow-step);
  position: absolute;
  left: 16px;
  top: 17px;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #041117;
  font-weight: 900;
}

.flow-list strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
}

.page-footer {
  width: min(980px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 0 0 28px;
}

.site-footer {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(14, 24, 42, 0.92), rgba(9, 16, 30, 0.82));
  box-shadow: var(--shadow);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 38%, rgba(124, 240, 207, 0.06));
  pointer-events: none;
}

.footer-copy,
.footer-actions,
.footer-note {
  position: relative;
}

.footer-copy {
  max-width: 760px;
  margin-bottom: 18px;
}

.footer-copy h2 {
  margin: 0 0 10px;
  font-family: "Space Grotesk", Manrope, sans-serif;
  font-size: clamp(1.55rem, 4vw, 2.25rem);
  line-height: 1.06;
}

.footer-copy p,
.footer-note {
  color: var(--muted);
  line-height: 1.65;
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-note {
  margin: 22px 0 0;
  color: #7f92b1;
  font-size: 0.92rem;
}

@media (min-width: 960px) {
  .program-output {
    grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.92fr);
    align-items: start;
  }

  .controls {
    grid-column: 1 / -1;
  }

  .display,
  .output {
    height: 376px;
  }

  canvas {
    height: 100%;
  }

  .output {
    display: flex;
    flex-direction: column;
  }

  pre {
    flex: 1;
    max-height: none;
    min-height: 0;
  }

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

  .split-section {
    grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
    width: min(100vw - 1rem, 100%);
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 16px;
    border-radius: 0 0 18px 18px;
  }

  .site-nav {
    justify-content: flex-start;
    gap: 12px 16px;
  }

  .app {
    width: min(100vw - 1rem, 100%);
    padding: 10px 0;
    gap: 10px;
  }

  .toolbar {
    align-items: stretch;
    flex-direction: column;
    padding: 16px;
  }

  .controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    justify-content: stretch;
  }

  .angle-control {
    grid-column: 1 / -1;
    justify-content: space-between;
  }

  button,
  select {
    width: 100%;
  }

  .stage {
    width: 100%;
    max-width: 100%;
    margin-top: 12px;
  }

  .stage,
  .output,
  .portfolio-section {
    padding: 12px;
    border-radius: 20px;
  }

  .page-footer {
    width: min(100vw - 1rem, 100%);
    padding-bottom: 18px;
  }

  .site-footer {
    padding: 16px;
    border-radius: 20px;
  }
}