styles.css

:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --ink: #16202a;
  --muted: #667380;
  --line: #dfe5ec;
  --teal: #0f9f8f;
  --teal-dark: #087568;
  --coral: #df5a45;
  --gold: #bd8d24;
  --blue: #316fd0;
  --green-soft: #dff5ef;
  --coral-soft: #fde6df;
  --gold-soft: #fff2c9;
  --blue-soft: #e4edff;
  --shadow: 0 18px 55px rgba(25, 39, 52, 0.12);
  color-scheme: light;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  background:
    linear-gradient(120deg, rgba(15, 159, 143, 0.08), transparent 34%),
    linear-gradient(260deg, rgba(223, 90, 69, 0.08), transparent 30%),
    var(--bg);
  color: var(--ink);
  overflow-x: hidden;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 70px;
  padding: 12px clamp(18px, 4vw, 54px);
  border-bottom: 1px solid rgba(223, 229, 236, 0.8);
  background: rgba(247, 248, 251, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 220px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--ink);
  color: white;
  font-size: 13px;
  font-weight: 800;
}

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

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

nav a {
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  background: var(--surface);
  color: var(--ink);
  outline: none;
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 70px);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: clamp(24px, 5vw, 70px);
  align-items: center;
  padding: 48px 0 36px;
}

.hero-copy {
  max-width: 760px;
  min-width: 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  max-width: 920px;
  font-size: clamp(44px, 7vw, 86px);
  line-height: 0.96;
  letter-spacing: 0;
  overflow-wrap: break-word;
  hyphens: auto;
}

h2,
h3,
p,
li,
a,
button {
  overflow-wrap: break-word;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 19px;
}

.hero-copy > p:not(.eyebrow),
.section-head p {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 12px 16px;
  font: inherit;
  font-size: 14px;
  font-weight: 850;
  cursor: pointer;
  text-decoration: none;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

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

.button.primary {
  background: var(--ink);
  color: #fff;
  box-shadow: 0 10px 26px rgba(22, 32, 42, 0.18);
}

.button.ghost {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
}

.button.small {
  padding: 8px 10px;
  font-size: 12px;
}

.signal-panel {
  position: relative;
  min-width: 0;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.72)),
    repeating-linear-gradient(0deg, rgba(22, 32, 42, 0.04), rgba(22, 32, 42, 0.04) 1px, transparent 1px, transparent 28px);
  box-shadow: var(--shadow);
}

.pulse-grid {
  position: absolute;
  inset: 38px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.pulse-grid span {
  min-height: 78px;
  border-radius: 8px;
  background: linear-gradient(160deg, rgba(15, 159, 143, 0.18), rgba(49, 111, 208, 0.12));
  border: 1px solid rgba(15, 159, 143, 0.22);
}

.pulse-grid span:nth-child(3n) {
  background: linear-gradient(160deg, rgba(223, 90, 69, 0.16), rgba(189, 141, 36, 0.12));
  border-color: rgba(223, 90, 69, 0.22);
}

.pulse-grid span:nth-child(4n) {
  background: linear-gradient(160deg, rgba(49, 111, 208, 0.17), rgba(15, 159, 143, 0.12));
  border-color: rgba(49, 111, 208, 0.22);
}

.signal-stats {
  position: absolute;
  right: 24px;
  bottom: 24px;
  left: 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.signal-stats div {
  min-height: 118px;
  padding: 18px;
  border: 1px solid rgba(223, 229, 236, 0.88);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
}

.signal-stats strong {
  display: block;
  font-size: 42px;
  line-height: 1;
}

.signal-stats span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.notice {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin: 0 0 72px;
  padding: 18px 20px;
  border: 1px solid rgba(189, 141, 36, 0.34);
  border-radius: 8px;
  background: var(--gold-soft);
  color: #4b3b0b;
  line-height: 1.55;
}

.notice strong {
  white-space: nowrap;
}

.notice span,
.guardrail span {
  min-width: 0;
}

.section {
  padding: 68px 0;
}

.section-head {
  margin-bottom: 26px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.wave-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.wave-card {
  min-height: 250px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 34px rgba(25, 39, 52, 0.08);
}

.wave-card span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-weight: 900;
}

.wave-card:nth-child(2) span {
  background: var(--teal-dark);
}

.wave-card:nth-child(3) span {
  background: var(--blue);
}

.wave-card:nth-child(4) span {
  background: var(--coral);
}

.wave-card p {
  color: var(--muted);
  line-height: 1.55;
}

.wave-card strong {
  display: block;
  line-height: 1.45;
}

.guardrail {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: 16px;
  padding: 18px 20px;
  border: 1px solid rgba(223, 90, 69, 0.28);
  border-radius: 8px;
  background: var(--coral-soft);
  color: #6d2a1f;
  line-height: 1.55;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.case-card,
.transfer-panel,
.implementation-note,
.terminal-log {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 34px rgba(25, 39, 52, 0.08);
}

.case-card {
  min-height: 310px;
  padding: 20px;
}

.case-card p,
.case-card li,
.transfer-panel li,
.implementation-note {
  color: var(--muted);
  line-height: 1.55;
}

.case-card ul,
.transfer-panel ul {
  margin: 14px 0 0;
  padding-left: 18px;
}

.warning-card {
  border-color: rgba(223, 90, 69, 0.26);
  background: linear-gradient(145deg, rgba(253, 230, 223, 0.88), rgba(255, 255, 255, 0.92));
}

.transfer-panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 14px;
  padding: 22px;
}

.implementation-note {
  display: flex;
  gap: 14px;
  margin-top: 14px;
  padding: 18px 20px;
  border-color: rgba(15, 159, 143, 0.28);
  background: linear-gradient(145deg, var(--green-soft), rgba(255, 255, 255, 0.94));
}

.implementation-note strong {
  color: var(--ink);
  white-space: nowrap;
}

code {
  border-radius: 6px;
  background: rgba(22, 32, 42, 0.07);
  color: var(--ink);
  padding: 1px 4px;
}

.terminal-log {
  margin-top: 14px;
  overflow: hidden;
}

.terminal-log summary {
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 850;
}

.terminal-log pre {
  border-radius: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.day-card,
.panel,
.prompt-card,
.source-card,
.task-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 34px rgba(25, 39, 52, 0.08);
}

.day-card {
  min-height: 260px;
  padding: 20px;
}

.day-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--teal);
}

.day-card:nth-child(2n) .dot {
  background: var(--blue);
}

.day-card:nth-child(3n) .dot {
  background: var(--coral);
}

.day-card:nth-child(4n) .dot {
  background: var(--gold);
}

.day-card ul,
.sources ul {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.55;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.panel {
  padding: 22px;
}

.panel-head {
  margin-bottom: 18px;
}

.controls {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  padding: 10px 12px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--teal);
  outline: 3px solid rgba(15, 159, 143, 0.14);
}

.check {
  grid-template-columns: auto 1fr;
  align-items: center;
  grid-column: 1 / -1;
}

.check input {
  width: 18px;
  min-height: 18px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.metrics div,
.estimate {
  padding: 16px;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--green-soft), #fff);
  border: 1px solid rgba(15, 159, 143, 0.22);
}

.metrics span,
.estimate span,
.estimate small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
}

.metrics strong,
.estimate strong {
  display: block;
  margin-top: 8px;
  font-size: 32px;
  line-height: 1;
}

.estimate {
  margin-top: 18px;
  background: linear-gradient(145deg, var(--blue-soft), #fff);
  border-color: rgba(49, 111, 208, 0.22);
}

.estimate small {
  margin-top: 8px;
}

.task-form {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 150px 170px auto;
  gap: 10px;
  margin-bottom: 16px;
}

.kanban {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.lane {
  min-height: 280px;
  padding: 14px;
  border: 1px dashed rgba(102, 115, 128, 0.38);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.52);
}

.lane h3 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 12px;
  font-size: 15px;
}

.lane-count {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
}

.task-card {
  padding: 13px;
  margin-bottom: 10px;
}

.task-card strong {
  display: block;
  margin-bottom: 8px;
  overflow-wrap: anywhere;
}

.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 4px 8px;
  border-radius: 8px;
  background: var(--blue-soft);
  color: #21446e;
  font-size: 11px;
  font-weight: 850;
}

.tag.alt {
  background: var(--coral-soft);
  color: #7b2e20;
}

.task-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.task-actions button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 850;
  padding: 7px 9px;
}

.prompt-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.prompt-card {
  display: grid;
  gap: 14px;
  padding: 18px;
}

pre {
  margin: 0;
  overflow: auto;
  border-radius: 8px;
  background: #111820;
  color: #f4f8fb;
  padding: 16px;
  font-size: 13px;
  line-height: 1.5;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.sources {
  padding-bottom: 96px;
}

.sources ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  list-style: none;
  padding: 0;
}

.sources li {
  min-height: 76px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
}

.sources a {
  color: var(--blue);
  font-weight: 850;
}

@media (max-width: 980px) {
  .hero,
  .split,
  .timeline,
  .wave-grid,
  .case-grid,
  .transfer-panel,
  .kanban,
  .prompt-grid,
  .sources ul {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .signal-panel {
    min-height: 420px;
  }

  .task-form {
    grid-template-columns: 1fr 1fr;
  }

  .task-form input {
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
  }

  nav {
    justify-content: flex-start;
    gap: 2px;
    width: 100%;
  }

  nav a {
    padding: 8px 7px;
    font-size: 13px;
  }

  main {
    width: calc(100vw - 36px);
  }

  h1 {
    max-width: min(100%, 330px);
    font-size: 34px;
    line-height: 1.02;
    word-break: normal;
  }

  .hero-copy > p:not(.eyebrow),
  .section-head p {
    max-width: min(100%, 330px);
    font-size: 17px;
  }

  .notice,
  .guardrail,
  .implementation-note,
  .hero-actions {
    flex-direction: column;
  }

  .notice span,
  .guardrail span,
  .implementation-note span {
    max-width: min(100%, 330px);
  }

  .implementation-note strong {
    white-space: normal;
  }

  .button {
    width: 100%;
    text-align: center;
  }

  .signal-stats,
  .controls,
  .metrics,
  .task-form {
    grid-template-columns: 1fr;
  }

  .pulse-grid {
    inset: 24px;
    grid-template-columns: repeat(3, 1fr);
  }

  .signal-stats {
    right: 12px;
    left: 12px;
    bottom: 12px;
  }
}