:root {
  color-scheme: dark;
  --bg: #0a0b0f;
  --surface: #111318;
  --surface-2: #151820;
  --surface-3: #0d0f14;
  --text: #f5f7fb;
  --muted: #8c94a3;
  --line: rgba(255,255,255,.09);
  --line-strong: rgba(255,255,255,.16);
  --accent: #d7ff59;
  --accent-2: #70f0c1;
  --accent-ink: #141808;
  --danger: #ff8e98;
  --shadow: 0 28px 90px rgba(0,0,0,.30);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --shell: 1180px;
}

:root.light {
  color-scheme: light;
  --bg: #f4f4ef;
  --surface: #ffffff;
  --surface-2: #f8f8f3;
  --surface-3: #efefe9;
  --text: #171914;
  --muted: #6e7468;
  --line: rgba(23,25,20,.10);
  --line-strong: rgba(23,25,20,.17);
  --accent: #bce72c;
  --accent-2: #3bd0a0;
  --accent-ink: #141808;
  --danger: #c93443;
  --shadow: 0 28px 90px rgba(30,35,20,.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  min-width: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }

.page-glow {
  position: fixed;
  z-index: -1;
  width: 34rem;
  height: 34rem;
  border-radius: 999px;
  filter: blur(80px);
  opacity: .12;
  pointer-events: none;
}
.glow-a { top: -15rem; left: -10rem; background: var(--accent-2); }
.glow-b { top: 10rem; right: -20rem; background: var(--accent); opacity: .08; }

.topbar,
.shell,
.footer {
  width: min(var(--shell), calc(100% - 48px));
  margin-inline: auto;
}

.topbar {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line);
}
.brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.brand-icon {
  flex: 0 0 auto;
  height: 36px;
  min-width: 52px;
  padding-inline: 9px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: var(--accent);
  color: var(--accent-ink);
  font: 900 11px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.brand-copy { min-width: 0; display: grid; line-height: 1.05; }
.brand-copy b { font-size: 16px; letter-spacing: -.02em; }
.brand-copy small { margin-top: 4px; color: var(--muted); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.top-actions { display: flex; align-items: center; gap: 10px; }
.nav-link { padding: 10px 12px; color: var(--muted); font-size: 13px; font-weight: 700; }
.nav-link:hover { color: var(--text); }
.circle-btn,
.mini-btn,
.secondary-btn,
.share-btn,
.calculate-btn,
.link-btn {
  border: 0;
  cursor: pointer;
  transition: transform .16s ease, border-color .16s ease, background .16s ease, opacity .16s ease;
}
.circle-btn:hover,
.secondary-btn:hover,
.share-btn:hover,
.calculate-btn:hover { transform: translateY(-1px); }
.circle-btn:active,
.secondary-btn:active,
.share-btn:active,
.calculate-btn:active { transform: translateY(0); }
.circle-btn {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, .92fr);
  gap: clamp(40px, 7vw, 92px);
  align-items: center;
  padding: clamp(74px, 10vw, 132px) 0 clamp(82px, 10vw, 120px);
}
.hero-copy, .input-card, .result-title-wrap, .metric, .panel, .history-item > *, .about-copy, .rule-card > div { min-width: 0; }
.tag,
.mini-label {
  font: 800 10px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}
.tag { display: inline-flex; align-items: center; gap: 9px; }
.tag span { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 10%, transparent); }
.hero-copy h1 {
  max-width: 760px;
  margin: 18px 0 24px;
  font-size: clamp(54px, 7.3vw, 96px);
  line-height: .94;
  letter-spacing: -.065em;
  font-weight: 850;
  text-wrap: balance;
}
.hero-copy h1 em { color: var(--accent); font-style: normal; }
.hero-copy > p {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.75;
}
.hero-copy code { color: var(--text); font-size: .9em; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.hero-meta span {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font: 700 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.input-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, transparent), var(--surface));
  box-shadow: var(--shadow);
}
.input-card-head,
.input-footer,
.result-head,
.panel-head,
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.input-card-head h2 { margin: 7px 0 0; font-size: 22px; letter-spacing: -.03em; }
.mini-btn,
.link-btn {
  padding: 7px 0;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}
.mini-btn:hover, .link-btn:hover { color: var(--text); }
.number-field {
  width: 100%;
  min-width: 0;
  height: 88px;
  margin: 28px 0 14px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background: var(--surface-3);
}
.number-field:focus-within { border-color: color-mix(in srgb, var(--accent) 65%, var(--line)); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 8%, transparent); }
.prompt { flex: 0 0 auto; color: var(--accent); font: 900 18px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.number-field input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font: 800 clamp(26px, 3.4vw, 40px)/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: -.04em;
}
.number-field input::placeholder { color: color-mix(in srgb, var(--muted) 55%, transparent); }
.input-footer small { min-width: 0; color: var(--muted); font-size: 11px; line-height: 1.45; }
.calculate-btn {
  flex: 0 0 auto;
  min-height: 46px;
  padding: 0 17px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border-radius: 14px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 13px;
  font-weight: 900;
}
.error { min-height: 18px; margin: 12px 0 -4px; color: var(--danger); font-size: 12px; font-weight: 700; }

.results { padding: 82px 0; border-top: 1px solid var(--line); }
.result-head { align-items: flex-end; margin-bottom: 24px; }
.result-title-wrap { max-width: min(720px, 70%); }
.result-title-wrap h2 {
  max-width: 100%;
  margin: 8px 0 0;
  font-size: clamp(30px, 4.3vw, 52px);
  line-height: 1.05;
  letter-spacing: -.045em;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.result-actions { flex: 0 0 auto; display: flex; gap: 9px; }
.secondary-btn,
.share-btn {
  min-height: 44px;
  padding: 0 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 13px;
  font-size: 12px;
  font-weight: 850;
}
.secondary-btn { border: 1px solid var(--line); background: var(--surface); }
.share-btn { background: var(--accent); color: var(--accent-ink); }

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.metric {
  min-height: 178px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
}
.metric-primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.metric-label { color: var(--muted); font: 800 9px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .14em; }
.metric-primary .metric-label, .metric-primary p { color: color-mix(in srgb, var(--accent-ink) 70%, transparent); }
.metric-value-line { min-width: 0; margin: 19px 0 auto; display: flex; align-items: baseline; gap: 8px; overflow: hidden; }
.metric strong {
  min-width: 0;
  max-width: 100%;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 850 clamp(27px, 3.1vw, 41px)/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: -.055em;
}
.metric small { flex: 0 0 auto; color: var(--muted); font: 700 11px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.metric-primary small { color: color-mix(in srgb, var(--accent-ink) 65%, transparent); }
.metric p { margin: 18px 0 0; color: var(--muted); font-size: 11px; }

.visual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, .55fr);
  gap: 12px;
  margin-top: 12px;
}
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  overflow: hidden;
}
.panel-head { min-height: 76px; padding: 18px 20px; border-bottom: 1px solid var(--line); }
.panel-head h3 { margin: 6px 0 0; font-size: 17px; letter-spacing: -.025em; }
.scale-note { flex: 0 0 auto; color: var(--muted); font: 700 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.chart-wrap { position: relative; width: 100%; height: 390px; min-height: 260px; overflow: hidden; }
#chart { display: block; width: 100%; height: 100%; }
.sequence {
  height: 390px;
  overflow: auto;
  padding: 20px;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  font: 720 13px/1.9 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.sequence .arrow { padding: 0 7px; color: var(--muted); font-weight: 500; }
.sequence .start { color: var(--accent-2); }
.sequence .one { color: var(--accent); }

.recent-section { padding: 82px 0; border-top: 1px solid var(--line); }
.section-heading { align-items: flex-end; margin-bottom: 22px; }
.section-heading h2, .about-copy h2 { margin: 7px 0 0; font-size: clamp(28px, 4vw, 44px); letter-spacing: -.045em; }
.history { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.history-empty { grid-column: 1 / -1; padding: 28px 0; color: var(--muted); font-size: 13px; }
.history-item {
  width: 100%;
  min-width: 0;
  min-height: 112px;
  padding: 17px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, .8fr);
  align-items: end;
  gap: 12px;
  text-align: left;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--surface);
  cursor: pointer;
}
.history-item:hover { border-color: var(--line-strong); }
.history-item strong {
  max-width: 100%;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 800 17px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.history-item small { display: block; margin-top: 7px; color: var(--muted); font-size: 10px; }
.history-peak { min-width: 0; text-align: right; }

.about-section {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: clamp(36px, 7vw, 90px);
  align-items: start;
  padding: 82px 0 120px;
  border-top: 1px solid var(--line);
}
.about-copy p { max-width: 430px; margin: 18px 0 0; color: var(--muted); line-height: 1.75; }
.rules { display: grid; gap: 10px; }
.rule-card {
  min-width: 0;
  padding: 22px;
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.rule-index { color: var(--muted); font: 800 11px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; padding-top: 5px; }
.rule-card div > span { color: var(--accent); font: 800 9px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .12em; }
.rule-card h3 { margin: 7px 0 9px; font-size: 18px; }
.rule-card code { color: var(--muted); font-size: 13px; overflow-wrap: anywhere; }

.footer {
  min-height: 82px;
  padding-bottom: max(0px, env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
}

.toast {
  position: fixed;
  z-index: 20;
  left: 50%;
  bottom: max(24px, calc(18px + env(safe-area-inset-bottom)));
  max-width: calc(100vw - 32px);
  padding: 11px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  color: var(--text);
  box-shadow: 0 14px 50px rgba(0,0,0,.28);
  backdrop-filter: blur(14px);
  font-size: 12px;
  font-weight: 800;
  opacity: 0;
  transform: translate(-50%, 14px);
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-copy { max-width: 760px; }
  .input-card { max-width: 700px; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .visual-grid { grid-template-columns: 1fr; }
  .chart-wrap { height: 340px; }
  .sequence { height: 300px; }
  .history { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .topbar, .shell, .footer { width: min(100% - 28px, var(--shell)); }
  .topbar { min-height: 68px; }
  .brand-copy small, .nav-link { display: none; }
  .hero-grid { padding: 60px 0 74px; }
  .hero-copy h1 { font-size: clamp(49px, 15vw, 76px); }
  .hero-copy > p { font-size: 15px; }
  .input-card { padding: 18px; border-radius: 22px; }
  .number-field { height: 74px; margin-top: 22px; padding-inline: 14px; }
  .number-field input { font-size: clamp(25px, 8vw, 34px); }
  .input-footer { align-items: flex-end; }
  .input-footer small { max-width: 48%; }
  .results, .recent-section { padding: 66px 0; }
  .result-head { align-items: flex-start; }
  .result-title-wrap { max-width: 100%; }
  .result-actions { align-self: stretch; }
  .secondary-btn span:last-child { display: none; }
  .secondary-btn { width: 44px; padding: 0; }
  .metrics { gap: 8px; }
  .metric { min-height: 150px; padding: 16px; }
  .metric p { display: none; }
  .metric-value-line { margin-top: 20px; }
  .metric strong { font-size: clamp(24px, 7vw, 32px); }
  .panel { border-radius: 20px; }
  .panel-head { min-height: 68px; padding: 15px 16px; }
  .chart-wrap { height: 280px; }
  .sequence { height: 260px; padding: 16px; font-size: 12px; }
  .history { grid-template-columns: 1fr; }
  .about-section { grid-template-columns: 1fr; gap: 32px; padding: 66px 0 90px; }
  .footer { min-height: 70px; }
}

@media (max-width: 430px) {
  .hero-copy h1 { letter-spacing: -.06em; }
  .input-card-head h2 { font-size: 19px; }
  .input-footer small { display: none; }
  .calculate-btn { width: 100%; justify-content: space-between; }
  .input-footer { display: block; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metric { min-height: 132px; }
  .metric-label { font-size: 8px; }
  .metric strong { font-size: clamp(22px, 7.5vw, 29px); }
  .result-head { gap: 14px; }
  .result-actions { gap: 7px; }
  .share-btn { padding-inline: 12px; }
  .share-btn span:last-child { display: none; }
  .share-btn { width: 44px; padding: 0; }
  .rule-card { grid-template-columns: 38px minmax(0, 1fr); gap: 10px; padding: 18px; }
  .footer { flex-direction: column; align-items: flex-start; justify-content: center; gap: 3px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}