/* Pono Toolkit landing page
 * Design intent: pono — balanced, considered, honest. Navy foundation
 * for stability, warm coral accent for Pacific energy, generous spacing,
 * one-page focus. No marketing puff. */

:root {
  /* Navy — the foundation */
  --navy-950: #061327;
  --navy-900: #0b1c33;
  --navy-800: #102544;
  --navy-700: #14326e;
  --navy-500: #1e3a5f;
  --navy-300: #5278a8;
  --navy-100: #cfdbeb;
  --navy-050: #e8eef7;

  /* Warm Pacific accent — sunset over Kailua */
  --coral-600: #e25a4f;
  --coral-500: #ec6f5d;
  --coral-300: #f4a292;

  /* Neutrals */
  --ink: #0e1726;
  --ink-soft: #46566b;
  --ink-mute: #7e8b9d;
  --paper: #ffffff;
  --paper-soft: #f7f9fc;
  --paper-tint: #eef3f9;
  --border: #d8e0eb;
  --border-soft: #e8eef5;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(11, 28, 51, 0.06), 0 1px 1px rgba(11, 28, 51, 0.04);
  --shadow-md: 0 8px 24px rgba(11, 28, 51, 0.08), 0 2px 6px rgba(11, 28, 51, 0.05);
  --shadow-lg: 0 20px 40px rgba(11, 28, 51, 0.12), 0 4px 12px rgba(11, 28, 51, 0.06);

  --max-w: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--navy-700);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--coral-600); }

.inline-link { color: var(--coral-500); border-bottom: 1px dotted currentColor; }
.inline-link:hover { color: var(--coral-600); border-bottom-color: currentColor; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

code {
  background: var(--paper-tint);
  color: var(--navy-800);
  padding: 2px 7px;
  border-radius: 4px;
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, ui-monospace, monospace;
  font-size: 0.88em;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.kicker {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--coral-500);
  margin: 0 0 14px 0;
}

.kicker-soft {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 12px 0;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background:
    radial-gradient(ellipse 1200px 700px at 80% 0%, rgba(236, 111, 93, 0.18) 0%, transparent 60%),
    linear-gradient(160deg, var(--navy-900) 0%, var(--navy-800) 55%, var(--navy-700) 100%);
  color: var(--paper);
  padding: 0 0 112px 0;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.08) 30%, rgba(255,255,255,0.08) 70%, transparent 100%);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  padding-bottom: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.005em;
}
.brand:hover { color: var(--paper); }

.logo-mark {
  width: 28px;
  height: 28px;
  color: var(--coral-500);
  flex-shrink: 0;
}

.brand-text { letter-spacing: -0.01em; }

.nav-links {
  display: flex;
  gap: 30px;
  font-size: 14px;
}
.nav-links a {
  color: var(--navy-100);
  opacity: 0.78;
  font-weight: 500;
  transition: opacity 0.15s ease, color 0.15s ease;
}
.nav-links a:hover { opacity: 1; color: var(--paper); }

.hero-content {
  padding-top: 72px;
  max-width: 820px;
}

.hero h1 {
  font-size: 64px;
  font-weight: 600;
  line-height: 1.05;
  margin: 0 0 24px 0;
  letter-spacing: -0.025em;
}

.accent-text {
  background: linear-gradient(135deg, var(--coral-500) 0%, var(--coral-300) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 19px;
  line-height: 1.55;
  color: var(--navy-100);
  max-width: 700px;
  margin: 0 0 36px 0;
  opacity: 0.92;
}

.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.hero-meta {
  font-size: 13px;
  color: var(--navy-300);
  margin: 0;
  letter-spacing: 0.01em;
}
.hero-meta a {
  color: var(--navy-100);
  border-bottom: 1px dotted rgba(207, 219, 235, 0.5);
}
.hero-meta a:hover { color: var(--paper); border-bottom-color: var(--paper); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-weight: 500;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
  border: 1px solid transparent;
  font-size: 15px;
  line-height: 1.3;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--paper);
  color: var(--navy-800);
}
.btn-primary:hover { background: var(--paper); color: var(--navy-900); }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(255, 255, 255, 0.22);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--paper);
}

.btn-lg {
  padding: 18px 28px;
  min-width: 280px;
}

.btn-title { font-size: 16px; font-weight: 600; letter-spacing: -0.005em; }
.btn-sub { font-size: 13px; opacity: 0.72; margin-top: 3px; font-weight: 400; }

.btn-donate {
  background: var(--coral-500);
  color: var(--paper);
  margin: 12px 0 16px 0;
  padding: 16px 28px;
  min-width: 320px;
}
.btn-donate:hover { background: var(--coral-600); color: var(--paper); }
.btn-donate .btn-sub { opacity: 0.85; font-family: "JetBrains Mono", Consolas, monospace; }

/* ---------- Sections ---------- */

.section { padding: 104px 0; }
.section-tinted { background: var(--paper-soft); }

h2 {
  font-size: 38px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin: 0 0 20px 0;
  color: var(--navy-900);
  max-width: 720px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 10px 0;
  color: var(--navy-800);
  letter-spacing: -0.01em;
}

.section-lede {
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 720px;
  margin: 0 0 56px 0;
  line-height: 1.6;
}

/* ---------- Features grid ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  position: relative;
  background: var(--paper);
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

.card-num {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--coral-500);
  margin-bottom: 14px;
}

.card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.6;
}

/* ---------- Download ---------- */

.dl-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 0 0 36px 0;
}

#download .btn-primary {
  background: var(--navy-800);
  color: var(--paper);
}
#download .btn-primary:hover { background: var(--navy-900); color: var(--paper); }

#download .btn-ghost {
  background: var(--paper);
  color: var(--navy-800);
  border-color: var(--border);
}
#download .btn-ghost:hover {
  background: var(--paper);
  border-color: var(--navy-700);
  color: var(--navy-800);
}

.meta-list {
  margin: 0;
  padding: 24px 28px;
  background: var(--paper);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  display: grid;
  gap: 14px;
  max-width: 720px;
}

.meta-list > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  align-items: baseline;
}

.meta-list dt {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0;
}

.meta-list dd {
  font-size: 14px;
  color: var(--ink);
  margin: 0;
  line-height: 1.5;
}

.meta-list code {
  font-size: 12.5px;
  word-break: break-all;
}

/* ---------- Install ---------- */

.steps {
  padding: 0;
  margin: 0 0 28px 0;
  list-style: none;
  counter-reset: step;
  max-width: 760px;
}

.steps li {
  position: relative;
  padding: 18px 0 18px 56px;
  border-top: 1px solid var(--border-soft);
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.65;
  counter-increment: step;
}

.steps li:first-child { border-top: none; padding-top: 4px; }
.steps li:last-child { padding-bottom: 4px; }

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--coral-500);
  letter-spacing: 0.05em;
}

.steps li:first-child::before { top: 4px; }

.steps strong { color: var(--navy-800); font-weight: 600; }

.note {
  font-size: 14px;
  color: var(--ink-soft);
  max-width: 760px;
  margin: 0;
  line-height: 1.6;
  padding: 16px 18px;
  background: var(--paper-tint);
  border-left: 3px solid var(--coral-500);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ---------- Upstream ---------- */

.upstream-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 48px;
  align-items: start;
}

.upstream-grid p {
  font-size: 16px;
  color: var(--ink-soft);
  margin: 0 0 18px 0;
  line-height: 1.65;
}

.upstream-grid strong {
  color: var(--navy-800);
  font-weight: 600;
}

.upstream-aside {
  background: var(--paper);
  padding: 24px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
}

.link-list { list-style: none; padding: 0; margin: 0; }
.link-list li { padding: 5px 0; font-size: 14.5px; }
.link-list a { color: var(--navy-700); }
.link-list a:hover { color: var(--coral-600); }

/* ---------- Footer ---------- */

footer {
  background: var(--navy-950);
  color: var(--navy-100);
  padding: 72px 0 36px 0;
}

footer .brand { color: var(--paper); margin-bottom: 14px; }
footer .logo-mark { color: var(--coral-500); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14.5px;
  color: var(--navy-300);
  line-height: 1.55;
  margin: 0;
  max-width: 320px;
}

footer strong {
  display: block;
  color: var(--paper);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
}

footer .link-list li { color: var(--navy-300); }
footer .link-list a { color: var(--navy-100); opacity: 0.8; }
footer .link-list a:hover { opacity: 1; color: var(--paper); }

.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 28px;
  font-size: 13px;
  color: var(--navy-300);
  line-height: 1.6;
  margin: 0;
}

.copyright em {
  color: var(--coral-300);
  font-style: italic;
  font-weight: 500;
}

/* ---------- Mobile ---------- */

@media (max-width: 820px) {
  .hero { padding-bottom: 80px; }
  .hero h1 { font-size: 42px; }
  .hero-content { padding-top: 48px; }
  .tagline { font-size: 17px; }
  .nav-links { display: none; }

  h2 { font-size: 30px; }
  .section { padding: 72px 0; }
  .section-lede { margin-bottom: 40px; }

  .upstream-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }

  .btn-lg { min-width: 0; width: 100%; }
  .btn-donate { min-width: 0; width: 100%; }

  .meta-list > div { grid-template-columns: 1fr; gap: 4px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 36px; }
  .container { padding: 0 20px; }
  .footer-grid { grid-template-columns: 1fr; }
}