:root {
  color-scheme: light;
  --ink: #102024;
  --muted: #5c6a68;
  --line: #d9e2dc;
  --paper: #fbfcf8;
  --field: #f3f6f1;
  --accent: #0c6b5a;
  --accent-dark: #084d42;
  --blue: #194c7a;
  --warm: #c47a31;
  --shadow: 0 24px 80px rgba(17, 37, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  letter-spacing: 0;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 0 32px;
  border-bottom: 1px solid rgba(217, 226, 220, 0.72);
  background: rgba(251, 252, 248, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 43%, var(--paper) 43% 57%, transparent 57%),
    linear-gradient(0deg, transparent 43%, var(--paper) 43% 57%, transparent 57%),
    var(--accent);
  box-shadow: 0 0 0 6px rgba(12, 107, 90, 0.12);
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a {
  border-radius: 999px;
  padding: 10px 14px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: #eef4ef;
  color: var(--ink);
  outline: none;
}

.hero {
  position: relative;
  min-height: calc(100svh - 68px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #13292d;
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 28, 29, 0.98) 0%, rgba(10, 28, 29, 0.88) 34%, rgba(10, 28, 29, 0.34) 64%, rgba(10, 28, 29, 0.08) 100%),
    linear-gradient(0deg, rgba(10, 28, 29, 0.2), rgba(10, 28, 29, 0.02));
}

.hero-visual img {
  position: absolute;
  top: 50%;
  right: clamp(-220px, -10vw, -120px);
  width: min(62vw, 980px);
  height: min(74svh, 760px);
  object-fit: contain;
  transform: translateY(-50%);
  opacity: 0.82;
}

.hero-copy {
  position: relative;
  z-index: 2;
  width: min(620px, calc(100% - 40px));
  margin-left: clamp(20px, 7vw, 108px);
  padding: 80px 0;
  color: #fff;
  animation: rise-in 620ms ease-out both;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #a8e6d8;
}

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

h1 {
  max-width: 620px;
  margin-bottom: 22px;
  font-size: clamp(42px, 6.2vw, 76px);
  line-height: 1.02;
  letter-spacing: 0;
  color: #f8fff9;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.24);
  overflow-wrap: anywhere;
}

.hero-lede {
  max-width: 560px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.primary-action,
.secondary-action,
.prompt-toolbar button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border-radius: 999px;
  padding: 0 20px;
  font-weight: 800;
}

.primary-action {
  background: #fff;
  color: var(--ink);
}

.secondary-action {
  border: 1px solid rgba(255, 255, 255, 0.38);
  color: #fff;
}

.brief,
.principles,
.harness,
.playbook,
.habits {
  padding: clamp(70px, 9vw, 126px) clamp(20px, 6vw, 96px);
}

.brief {
  display: grid;
  grid-template-columns: minmax(240px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(34px, 6vw, 88px);
  border-bottom: 1px solid var(--line);
}

h2 {
  max-width: 780px;
  margin-bottom: 0;
  font-size: clamp(31px, 4vw, 56px);
  line-height: 1.08;
}

.brief-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.brief-list li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.brief-list span {
  color: var(--warm);
  font-weight: 900;
}

.brief-list strong {
  display: block;
  margin-bottom: 8px;
  font-size: 22px;
}

.brief-list p,
.section-head p,
.harness-copy p,
.habit-track p,
.principle-grid p {
  color: var(--muted);
  line-height: 1.75;
}

.principles {
  background: #f4f7f2;
}

.section-head {
  max-width: 850px;
  margin-bottom: 42px;
}

.section-head p:last-child {
  max-width: 720px;
  margin-top: 18px;
  font-size: 18px;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--line);
}

.principle-grid article {
  min-height: 290px;
  padding: 30px;
  background: var(--paper);
  transition: transform 180ms ease, background 180ms ease;
}

.principle-grid article:hover {
  transform: translateY(-4px);
  background: #fff;
}

.node-label {
  display: inline-flex;
  margin-bottom: 52px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
}

.principle-grid h3,
.habit-track strong {
  display: block;
  margin-bottom: 10px;
  font-size: 24px;
}

.harness {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(32px, 6vw, 86px);
  align-items: center;
}

.harness-copy p {
  max-width: 620px;
  margin-top: 22px;
  font-size: 18px;
}

.loop-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.loop-step {
  min-height: 112px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.loop-step span {
  display: block;
  margin-bottom: 16px;
  color: var(--warm);
  font-weight: 900;
}

.loop-step strong {
  font-size: 22px;
}

.loop-step:hover,
.loop-step:focus-visible,
.loop-step.active {
  border-color: rgba(12, 107, 90, 0.45);
  box-shadow: 0 18px 42px rgba(17, 37, 42, 0.1);
  transform: translateY(-3px);
  outline: none;
}

.loop-step,
.loop-detail {
  padding: 24px;
}

.loop-detail {
  grid-column: 1 / -1;
  min-height: 150px;
  border-left: 4px solid var(--accent);
  background: #eef5f0;
}

.detail-title {
  margin-bottom: 10px;
  color: var(--accent-dark);
  font-size: 24px;
  font-weight: 900;
}

.detail-body {
  margin-bottom: 0;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.7;
}

.playbook {
  background: #102024;
  color: #fff;
}

.playbook .section-kicker {
  color: #a8e6d8;
}

.playbook .section-head p {
  color: rgba(255, 255, 255, 0.72);
}

.trainer {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  gap: 24px;
  align-items: stretch;
}

.trainer-controls {
  display: grid;
  gap: 16px;
}

.trainer-controls label {
  display: grid;
  gap: 8px;
}

.trainer-controls span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  font-weight: 800;
}

.trainer-controls input,
.trainer-controls select,
.trainer-controls textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  padding: 13px 14px;
  outline: none;
}

.trainer-controls select option {
  color: var(--ink);
}

.trainer-controls input:focus,
.trainer-controls select:focus,
.trainer-controls textarea:focus {
  border-color: #a8e6d8;
}

.prompt-panel {
  min-width: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.prompt-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 58px;
  padding: 0 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  font-weight: 900;
}

.prompt-toolbar button {
  min-height: 36px;
  border: 0;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

pre {
  min-height: 420px;
  max-height: 540px;
  margin: 0;
  overflow: auto;
  padding: 22px;
  color: #e8fff7;
  font-size: 15px;
  line-height: 1.72;
  white-space: pre-wrap;
}

.habits {
  display: grid;
  grid-template-columns: minmax(240px, 0.55fr) minmax(0, 1.45fr);
  gap: clamp(30px, 5vw, 70px);
}

.habit-track {
  display: grid;
  grid-template-columns: repeat(5, minmax(190px, 1fr));
  gap: 1px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--line);
}

.habit-track article {
  min-height: 230px;
  padding: 24px;
  background: #fff;
}

.footer {
  padding: 30px clamp(20px, 6vw, 96px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer p {
  margin: 0;
}

@keyframes rise-in {
  from {
    transform: translateY(24px);
  }
  to {
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .brief,
  .harness,
  .trainer,
  .habits {
    grid-template-columns: 1fr;
  }

  .principle-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .topbar {
    min-height: 60px;
    padding: 0 16px;
  }

  .brand span:last-child {
    max-width: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: calc(100svh - 60px);
  }

  .hero-copy {
    width: calc(100% - 32px);
    margin-left: 16px;
    padding: 54px 0;
  }

  .hero-visual img {
    top: 44%;
    right: -360px;
    width: 900px;
    height: 620px;
    opacity: 0.42;
  }

  .hero-visual::after {
    background:
      linear-gradient(90deg, rgba(10, 28, 29, 0.96), rgba(10, 28, 29, 0.78)),
      linear-gradient(0deg, rgba(10, 28, 29, 0.28), rgba(10, 28, 29, 0.04));
  }

  .hero-lede {
    max-width: 340px;
  }

  h1 {
    max-width: 350px;
    font-size: 38px;
    line-height: 1.12;
  }

  .principle-grid,
  .loop-board {
    grid-template-columns: 1fr;
  }

  .brief-list li {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 14px;
  }

  .loop-step {
    min-height: 92px;
  }

  .hero-actions a {
    width: 100%;
  }
}