/* Marathon: basic, dependency-free static site styles */

:root {
  --bg: #fbf7f2;
  --bg2: #f2efe9;
  --ink: #16120f;
  --ink-soft: rgba(22, 18, 15, 0.82);
  --ink-subtle: rgba(22, 18, 15, 0.78);
  --ink-faint: rgba(22, 18, 15, 0.76);
  --ink-dim: rgba(22, 18, 15, 0.74);
  --ink-tint: rgba(22, 18, 15, 0.18);
  --ink-wash: rgba(22, 18, 15, 0.06);
  --ink-wash-2: rgba(22, 18, 15, 0.04);
  --ink-wash-3: rgba(22, 18, 15, 0.03);
  --muted: rgba(22, 18, 15, 0.65);
  --line: rgba(22, 18, 15, 0.14);
  --paper: rgba(255, 255, 255, 0.68);
  --paper-solid: #fffdf9;
  --accent: #e4573a;
  --accent-2: #2a9d8f;
  --shadow: 0 12px 30px rgba(22, 18, 15, 0.16);
  --shadow-soft: 0 10px 22px rgba(22, 18, 15, 0.12);
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1120px;
  --pad: 20px;

  --font-sans: "Avenir Next", "Avenir", "Gill Sans", "Trebuchet MS", sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --header-bg: rgba(251, 247, 242, 0.66);
  --footer-bg: rgba(251, 247, 242, 0.6);

  /* Translucent surfaces used across components. */
  --surface: rgba(255, 255, 255, 0.55);
  --surface-ghost: rgba(255, 255, 255, 0.3);
  --surface-soft: rgba(255, 255, 255, 0.45);
  --surface-card: rgba(255, 255, 255, 0.42);
  --surface-card-2: rgba(255, 255, 255, 0.38);
  --surface-metric: rgba(255, 255, 255, 0.34);
  --surface-side: rgba(255, 255, 255, 0.32);
  --surface-input: rgba(255, 255, 255, 0.65);
  --surface-nav: rgba(255, 255, 255, 0.82);
  --surface-toast: rgba(255, 255, 255, 0.9);
  --surface-raised-a: rgba(255, 255, 255, 0.62);
  --surface-raised-b: rgba(255, 255, 255, 0.35);
  --surface-code: rgba(255, 255, 255, 0.5);

  /* Page background "atmosphere". */
  --glow-warm: rgba(228, 87, 58, 0.18);
  --glow-cool: rgba(42, 157, 143, 0.16);

  /* Paper grain: these are full colors so the same pattern can invert per theme. */
  --grain-1: rgba(22, 18, 15, 0.03);
  --grain-2: rgba(22, 18, 15, 0.018);
  --grain-opacity: 0.42;
  --grain-blend: multiply;
}

html {
  color-scheme: light;
}

html[data-theme="dark"] {
  color-scheme: dark;

  --bg: #0f0d0c;
  --bg2: #151210;
  --ink: #f4f0eb;
  --ink-soft: rgba(244, 240, 235, 0.82);
  --ink-subtle: rgba(244, 240, 235, 0.78);
  --ink-faint: rgba(244, 240, 235, 0.76);
  --ink-dim: rgba(244, 240, 235, 0.74);
  --ink-tint: rgba(244, 240, 235, 0.18);
  --ink-wash: rgba(244, 240, 235, 0.06);
  --ink-wash-2: rgba(244, 240, 235, 0.04);
  --ink-wash-3: rgba(244, 240, 235, 0.03);
  --muted: rgba(244, 240, 235, 0.65);
  --line: rgba(244, 240, 235, 0.14);
  --paper: rgba(15, 13, 12, 0.68);
  --paper-solid: #141110;
  --shadow: 0 14px 34px rgba(0, 0, 0, 0.55);
  --shadow-soft: 0 12px 26px rgba(0, 0, 0, 0.45);

  --header-bg: rgba(15, 13, 12, 0.72);
  --footer-bg: rgba(15, 13, 12, 0.72);

  --surface: rgba(20, 18, 16, 0.62);
  --surface-ghost: rgba(20, 18, 16, 0.52);
  --surface-soft: rgba(20, 18, 16, 0.58);
  --surface-card: rgba(20, 18, 16, 0.56);
  --surface-card-2: rgba(20, 18, 16, 0.52);
  --surface-metric: rgba(20, 18, 16, 0.48);
  --surface-side: rgba(20, 18, 16, 0.45);
  --surface-input: rgba(20, 18, 16, 0.68);
  --surface-nav: rgba(20, 18, 16, 0.92);
  --surface-toast: rgba(20, 18, 16, 0.92);
  --surface-raised-a: rgba(20, 18, 16, 0.66);
  --surface-raised-b: rgba(20, 18, 16, 0.46);
  --surface-code: rgba(20, 18, 16, 0.58);

  --glow-warm: rgba(228, 87, 58, 0.12);
  --glow-cool: rgba(42, 157, 143, 0.1);

  --grain-1: rgba(244, 240, 235, 0.03);
  --grain-2: rgba(244, 240, 235, 0.018);
  --grain-opacity: 0.18;
  --grain-blend: screen;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(1200px 800px at 15% 0%, var(--glow-warm), transparent 52%),
    radial-gradient(900px 600px at 90% 10%, var(--glow-cool), transparent 48%),
    linear-gradient(180deg, var(--bg), var(--bg2));
  font-family: var(--font-sans);
  line-height: 1.5;
}

/* Subtle paper grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: repeating-linear-gradient(
      45deg,
      var(--grain-1) 0,
      var(--grain-1) 1px,
      transparent 1px,
      transparent 10px
    ),
    repeating-linear-gradient(
      -45deg,
      var(--grain-2) 0,
      var(--grain-2) 1px,
      transparent 1px,
      transparent 14px
    );
  mix-blend-mode: var(--grain-blend);
}

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

a:hover {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.95em;
  background: var(--ink-wash);
  padding: 0.14em 0.4em;
  border-radius: 8px;
}

pre {
  margin: 0;
}

.container {
  width: min(var(--max), 100% - (var(--pad) * 2));
  margin-inline: auto;
}

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

.skip-link {
  position: absolute;
  left: 16px;
  top: 16px;
  z-index: 999;
  transform: translateY(-200%);
  background: var(--paper-solid);
  border: 1px solid var(--line);
  padding: 10px 12px;
  border-radius: 10px;
  box-shadow: var(--shadow-soft);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid rgba(228, 87, 58, 0.35);
  outline-offset: 2px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
}

.site-header.is-elevated {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 18px rgba(22, 18, 15, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(228, 87, 58, 0.18), rgba(42, 157, 143, 0.14));
  border: 1px solid var(--line);
  font-weight: 800;
  letter-spacing: -0.03em;
  font-family: var(--font-serif);
}

.brand-text {
  font-weight: 750;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-link {
  padding: 10px 10px;
  border-radius: 12px;
  color: var(--ink-soft);
}

.nav-link.is-active {
  background: var(--ink-wash);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-weight: 750;
  cursor: pointer;
}

.theme-toggle:hover {
  text-decoration: none;
  background: var(--surface);
}

.theme-toggle-pill {
  width: 34px;
  height: 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--ink-wash);
  position: relative;
  flex: 0 0 auto;
}

.theme-toggle-pill::after {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(228, 87, 58, 0.9), rgba(42, 157, 143, 0.9));
  position: absolute;
  top: 1px;
  left: 1px;
  transition: transform 160ms ease;
}

html[data-theme="dark"] .theme-toggle-pill::after {
  transform: translateX(16px);
}

.theme-toggle-text {
  font-size: 13px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav-cta {
  margin-left: 4px;
  padding: 10px 14px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(228, 87, 58, 0.92), rgba(228, 87, 58, 0.76));
  color: #fff;
  box-shadow: 0 8px 16px rgba(228, 87, 58, 0.22);
}

.nav-cta:hover {
  text-decoration: none;
  filter: saturate(1.05);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 12px;
  width: 44px;
  height: 44px;
  padding: 0;
  cursor: pointer;
}

.nav-toggle-lines {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  margin: 0 auto;
  position: relative;
}

.nav-toggle-lines::before,
.nav-toggle-lines::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

.nav-toggle-lines::before {
  top: -6px;
}

.nav-toggle-lines::after {
  top: 6px;
}

/* Hero */
.hero {
  padding: 56px 0 34px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 26px;
  align-items: start;
}

.kicker {
  margin: 0 0 12px;
  color: var(--muted);
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 12px;
}

.hero-title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  font-size: clamp(36px, 4.4vw, 58px);
}

.accent {
  background: linear-gradient(90deg, rgba(228, 87, 58, 0.95), rgba(42, 157, 143, 0.95));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  margin: 0 0 18px;
  color: var(--ink-subtle);
  max-width: 54ch;
  font-size: 16.5px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 999px;
  padding: 11px 16px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 10px 18px rgba(22, 18, 15, 0.08);
  font-weight: 650;
  cursor: pointer;
}

.button:hover {
  text-decoration: none;
  box-shadow: var(--shadow-soft);
}

.button.primary {
  border-color: rgba(228, 87, 58, 0.35);
  background: linear-gradient(135deg, rgba(228, 87, 58, 0.92), rgba(228, 87, 58, 0.72));
  color: #fff;
}

.button.ghost {
  background: var(--surface-ghost);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.metric {
  border: 1px solid var(--line);
  background: var(--surface-metric);
  border-radius: var(--radius-sm);
  padding: 12px 12px;
}

.metric dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.metric dd {
  margin: 2px 0 0;
  font-weight: 750;
}

.hero-card {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--surface-raised-a), var(--surface-raised-b));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px;
  border-bottom: 1px solid var(--line);
}

.chip {
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.02em;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--ink-wash);
}

.dots span {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  margin-left: 6px;
  background: var(--ink-tint);
}

.card-body {
  padding: 16px 16px 16px;
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  margin: 0 0 12px;
}

.muted {
  color: var(--muted);
}

.checklist {
  margin: 0 0 16px;
  padding-left: 18px;
}

.checklist li {
  margin: 7px 0;
}

.card-actions {
  display: flex;
  gap: 10px;
}

.mini {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  font-weight: 650;
  cursor: pointer;
}

.mini:hover {
  text-decoration: none;
  background: var(--surface);
}

/* Sections */
.section {
  padding: 44px 0;
}

.section.alt {
  background: var(--ink-wash-3);
  border-block: 1px solid var(--line);
}

.comments #disqus_thread {
  border: 1px solid var(--line);
  background: var(--surface-card);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: 0 12px 20px rgba(22, 18, 15, 0.06);
}

.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-serif);
  letter-spacing: -0.02em;
  font-size: 28px;
}

.section-head p {
  margin: 0;
  color: var(--ink-subtle);
  max-width: 72ch;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature {
  border: 1px solid var(--line);
  background: var(--surface-card-2);
  border-radius: var(--radius);
  padding: 16px 16px;
  box-shadow: 0 10px 18px rgba(22, 18, 15, 0.06);
}

.feature h3 {
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.feature p {
  margin: 0;
  color: var(--ink-faint);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.codeblock {
  border: 1px solid var(--line);
  background: var(--surface-code);
  border-radius: var(--radius);
  padding: 16px;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  box-shadow: 0 12px 20px rgba(22, 18, 15, 0.06);
}

/* Pages */
.page {
  padding-bottom: 10px;
}

.page-hero {
  padding: 44px 0 12px;
}

.page-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  letter-spacing: -0.03em;
  line-height: 1.12;
  font-size: clamp(32px, 3.4vw, 48px);
}

.page-subtitle {
  margin: 0;
  color: var(--ink-subtle);
  max-width: 70ch;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.bullets {
  margin: 10px 0 0;
  padding-left: 18px;
}

.bullets li {
  margin: 8px 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.card {
  display: block;
  border: 1px solid var(--line);
  background: var(--surface-card);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: 0 12px 20px rgba(22, 18, 15, 0.06);
}

.card:hover {
  text-decoration: none;
  box-shadow: var(--shadow-soft);
}

.card h3 {
  margin: 0 0 6px;
}

.card p {
  margin: 0;
  color: var(--ink-dim);
}

.divider {
  height: 1px;
  background: var(--line);
  margin: 22px 0;
}

.faq details {
  border: 1px solid var(--line);
  background: var(--surface-card);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin: 10px 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 750;
}

.faq p {
  margin: 10px 0 0;
  color: var(--ink-faint);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
  align-items: start;
}

.form {
  border: 1px solid var(--line);
  background: var(--surface-card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-soft);
}

.field {
  margin-bottom: 12px;
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

label {
  display: block;
  margin: 0 0 6px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface-input);
  padding: 12px 12px;
  font-family: inherit;
  font-size: 15px;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
button:focus,
a:focus {
  outline: 3px solid rgba(42, 157, 143, 0.28);
  outline-offset: 2px;
}

.hint {
  margin: 6px 2px 0;
  color: rgba(228, 87, 58, 0.92);
  min-height: 1.2em;
  font-size: 13px;
}

.form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.small {
  font-size: 13px;
}

.contact-side .side-card {
  border: 1px solid var(--line);
  background: var(--surface-side);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 12px 20px rgba(22, 18, 15, 0.05);
  margin-bottom: 12px;
}

.contact-side h2 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  letter-spacing: -0.02em;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--footer-bg);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 0;
}

/* Toast */
.toast-layer {
  position: fixed;
  inset: auto 16px 16px auto;
  z-index: 999;
  display: grid;
  gap: 10px;
}

.toast {
  width: min(360px, calc(100vw - 32px));
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--surface-toast);
  box-shadow: var(--shadow);
  padding: 12px 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: start;
  transform: translateY(10px);
  opacity: 0;
  transition: transform 180ms ease, opacity 180ms ease;
}

.toast.is-in {
  transform: translateY(0);
  opacity: 1;
}

.toast .toast-title {
  font-weight: 800;
  margin: 0 0 2px;
}

.toast .toast-msg {
  margin: 0;
  color: var(--ink-dim);
  font-size: 14px;
}

.toast .toast-close {
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--ink-wash-2);
  padding: 8px 10px;
  cursor: pointer;
  font-weight: 750;
}

/* Responsive */
@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

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

  .split {
    grid-template-columns: 1fr;
  }

  .two-col {
    grid-template-columns: 1fr;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .site-nav {
    position: absolute;
    right: var(--pad);
    top: 64px;
    display: none;
    min-width: min(360px, calc(100vw - (var(--pad) * 2)));
    padding: 12px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: var(--surface-nav);
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-link {
    padding: 12px 12px;
  }

  .theme-toggle {
    width: 100%;
    justify-content: space-between;
    padding: 12px 12px;
    border-radius: 14px;
  }

  .nav-cta {
    text-align: center;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .toast {
    transition: none;
  }

  .theme-toggle-pill::after {
    transition: none;
  }
}