@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Inter:wght@400;500;600&display=swap");

:root {
  --font-display: "Inter", "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-accent: "IBM Plex Mono", "SFMono-Regular", ui-monospace, monospace;
  --paper: #f5f5f7;
  --paper-deep: #eceef2;
  --paper-soft: rgba(255, 255, 255, 0.72);
  --surface: rgba(255, 255, 255, 0.7);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --ink: #424245;
  --ink-strong: #101114;
  --ink-soft: #6d6e73;
  --ink-whisper: rgba(66, 66, 69, 0.54);
  --accent: #0b6e4f;
  --accent-soft: rgba(11, 110, 79, 0.12);
  --accent-deep: #084c37;
  --line-green: #0b6e4f;
  --line-red: #c0392b;
  --shadow-soft: rgba(15, 20, 34, 0.045);
  --shadow-medium: rgba(15, 20, 34, 0.08);
  --border-soft: rgba(16, 17, 20, 0.08);
  --border-strong: rgba(16, 17, 20, 0.12);
  --radius-card: 28px;
  color: var(--ink);
  background: linear-gradient(180deg, #fbfbfd 0%, var(--paper) 52%, var(--paper-deep) 100%);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

:root[data-theme="dark"] {
  --paper: #0f1115;
  --paper-deep: #090b0e;
  --paper-soft: rgba(15, 17, 21, 0.76);
  --surface: rgba(26, 29, 35, 0.72);
  --surface-strong: rgba(28, 31, 38, 0.92);
  --ink: #d8dbe2;
  --ink-strong: #f5f7fb;
  --ink-soft: #9ea4b0;
  --ink-whisper: rgba(216, 219, 226, 0.56);
  --accent: #5dba96;
  --accent-soft: rgba(93, 186, 150, 0.16);
  --accent-deep: #eef3ff;
  --line-green: #5dba96;
  --line-red: #e06b63;
  --shadow-soft: rgba(0, 0, 0, 0.22);
  --shadow-medium: rgba(0, 0, 0, 0.32);
  --border-soft: rgba(245, 247, 251, 0.08);
  --border-strong: rgba(245, 247, 251, 0.12);
  background: linear-gradient(180deg, #13161b 0%, var(--paper) 48%, var(--paper-deep) 100%);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  font-family: var(--font-body);
  letter-spacing: -0.012em;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 18% 16%, rgba(11, 110, 79, 0.08) 0%, transparent 34%),
    radial-gradient(circle at 82% 84%, rgba(192, 57, 43, 0.06) 0%, transparent 32%);
  pointer-events: none;
  z-index: 0;
}

:root[data-theme="dark"] body::before {
  background-image:
    radial-gradient(circle at 24% 18%, rgba(93, 186, 150, 0.12) 0%, transparent 34%),
    radial-gradient(circle at 80% 82%, rgba(224, 107, 99, 0.08) 0%, transparent 30%);
}

a {
  color: var(--accent);
}

a:hover {
  color: var(--accent-deep);
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 4.5rem;
}

.shell-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding-top: 0.5rem;
}

.shell-header-bar {
  padding: 0.9rem 1rem;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: var(--paper-soft);
  backdrop-filter: blur(28px) saturate(140%);
  box-shadow: 0 10px 30px var(--shadow-soft);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--ink-strong);
  text-decoration: none;
}

.brand-dot {
  width: 0.78rem;
  height: 0.78rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--line-green), var(--line-red));
  box-shadow: 0 0 0 6px var(--accent-soft);
  flex: 0 0 auto;
}

.brand-copy {
  display: grid;
  gap: 0.1rem;
}

.brand-copy strong {
  font-size: 1.2rem;
  line-height: 1;
  letter-spacing: -0.04em;
  font-weight: 600;
}

.brand-copy small,
.kicker,
.phrase-label,
.theme-option-label,
.site-footer small,
.legal-meta {
  font-family: var(--font-accent);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-nav {
  display: flex;
  gap: 0.25rem;
}

.site-nav a {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink-strong);
  background: var(--surface-strong);
}

.theme-toggle {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.2rem;
  padding: 0.2rem;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: var(--surface);
}

.theme-toggle button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 999px;
  cursor: pointer;
  display: grid;
  place-items: center;
}

.theme-toggle button[aria-pressed="true"] {
  background: var(--surface-strong);
  color: var(--ink-strong);
  box-shadow: 0 4px 12px var(--shadow-soft);
}

.theme-icon {
  width: 1rem;
  height: 1rem;
}

.hero {
  margin: 3.5rem 0 2.5rem;
  max-width: 42rem;
}

.hero h1 {
  margin: 0.35rem 0 0.9rem;
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
  color: var(--ink-strong);
  font-weight: 600;
}

.hero p,
.prose p,
.prose li {
  color: var(--ink);
  font-size: 1.05rem;
}

.line-mark {
  display: inline-flex;
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.line-mark span {
  width: 2.4rem;
  height: 0.28rem;
  border-radius: 999px;
}

.line-mark .green {
  background: var(--line-green);
}

.line-mark .red {
  background: var(--line-red);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.15rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.button-primary {
  background: var(--ink-strong);
  color: var(--paper);
}

.button-primary:hover {
  color: var(--paper);
  opacity: 0.92;
}

.button-ghost {
  background: var(--surface-strong);
  color: var(--ink-strong);
  border: 1px solid var(--border-soft);
}

.button-ghost:hover {
  color: var(--ink-strong);
}

.feature-grid,
.phrase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 0 2.5rem;
}

.card,
.legal-card {
  padding: 1.35rem 1.4rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: 0 12px 30px var(--shadow-soft);
}

.card h2,
.card h3,
.legal-card h2 {
  margin: 0.2rem 0 0.45rem;
  color: var(--ink-strong);
  letter-spacing: -0.03em;
}

.card p,
.legal-card p {
  margin: 0;
}

.section-title {
  margin: 0 0 1rem;
  color: var(--ink-strong);
  letter-spacing: -0.03em;
}

.phrase {
  font-family: var(--font-accent);
  font-size: 0.92rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink-strong);
}

.enable-panel {
  display: grid;
  gap: 0.75rem;
  padding: 1.6rem 1.7rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-soft);
  background: var(--surface-strong);
  margin-bottom: 2.5rem;
}

.enable-panel ol {
  margin: 0;
  padding-left: 1.2rem;
}

.disclaimer,
.site-footer {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border-soft);
}

.site-footer a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--ink-strong);
}

.legal {
  max-width: 44rem;
  margin: 2.75rem auto 0;
}

.legal h1 {
  margin: 0.25rem 0 0.4rem;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.04em;
  color: var(--ink-strong);
}

.legal h2 {
  margin: 2rem 0 0.55rem;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  color: var(--ink-strong);
}

.legal table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.legal th,
.legal td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.4rem;
  border-bottom: 1px solid var(--border-soft);
}

.legal th {
  color: var(--ink-soft);
  font-weight: 600;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.75rem;
}

.skip-link:focus {
  left: 1rem;
  z-index: 40;
  background: var(--surface-strong);
  color: var(--ink-strong);
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 1rem, 1120px);
  }

  .shell-header-bar {
    border-radius: 1.5rem;
  }

  .topbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
  }

  .site-nav {
    grid-column: 1 / -1;
    order: 3;
    flex-wrap: wrap;
  }

  .feature-grid,
  .phrase-grid,
  .site-footer {
    grid-template-columns: 1fr;
    flex-direction: column;
  }
}