/* PawLens "Sage & Ink" design system
   Single shared stylesheet. No build step, no JS. */

:root {
  /* Light tokens (SPEC) */
  --brand: #0E7C6B;
  --brand-tint: #E3F2EE;
  --canvas: #FAFAF7;
  --card: #FFFFFF;
  --ink: #16233B;
  --ink-muted: #5B6577;
  --border: #E7E9E4;

  /* Score bands */
  --score-excellent: #1B9E4B;
  --score-good: #7BB662;
  --score-mediocre: #EFA33D;
  --score-poor: #E24C3F;
  --warn: #EFA33D;

  --radius: 24px;
  --radius-sm: 14px;
  --maxw: 1080px;
  --gap: clamp(1.5rem, 4vw, 3rem);

  --shadow: 0 1px 2px rgba(22, 35, 59, 0.04),
            0 8px 24px rgba(22, 35, 59, 0.06);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro",
          "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #2FA08D;
    --brand-tint: #16302B;
    --canvas: #101418;
    --card: #1A2027;
    --ink: #F2F4F7;
    --ink-muted: #9AA4B2;
    --border: #262E37;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3),
              0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--canvas);
  color: var(--ink);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.25rem);
  margin: 0 0 0.5em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  margin: 0 0 0.6em;
}

h3 {
  font-size: 1.2rem;
  margin: 0 0 0.4em;
}

p {
  margin: 0 0 1em;
}

.brand-accent {
  color: var(--brand);
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

.section {
  padding-block: clamp(3rem, 8vw, 6rem);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--brand);
  color: #fff;
  padding: 0.6em 1em;
  border-radius: var(--radius-sm);
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--canvas) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
}

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

.logo svg {
  width: 30px;
  height: 30px;
}

.nav-links {
  display: flex;
  gap: clamp(0.75rem, 3vw, 1.75rem);
  align-items: center;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--ink-muted);
}

.nav-links a:hover {
  color: var(--brand);
}

/* Hero */
.hero {
  text-align: center;
  padding-block: clamp(3rem, 9vw, 6.5rem);
}

.hero .logomark {
  width: 84px;
  height: 84px;
  margin: 0 auto 1.5rem;
}

.hero p.subline {
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  color: var(--ink-muted);
  max-width: 42ch;
  margin-inline: auto;
}

.tagline {
  max-width: 20ch;
  margin-inline: auto;
}

/* App Store badge */
.store-badge {
  display: inline-flex;
  margin-top: 1.75rem;
}

.store-badge img {
  height: 54px;
}

.store-note {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: 0.75rem;
}

/* Feature grid */
.features {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2rem);
  box-shadow: var(--shadow);
}

.feature .icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--brand-tint);
  display: grid;
  place-items: center;
  margin-bottom: 1.1rem;
}

.feature .icon svg {
  width: 30px;
  height: 30px;
}

.feature h3 {
  margin-bottom: 0.35em;
}

.feature p {
  color: var(--ink-muted);
  margin: 0;
  font-size: 0.98rem;
}

/* The math hook */
.math-hook {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: var(--shadow);
  display: grid;
  gap: 1.5rem;
  align-items: center;
}

@media (min-width: 720px) {
  .math-hook {
    grid-template-columns: 1fr 1fr;
  }
}

.math-hook .bars {
  display: grid;
  gap: 1rem;
}

.bar-row {
  display: grid;
  gap: 0.35rem;
}

.bar-row .label {
  font-size: 0.85rem;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
}

.bar {
  height: 26px;
  border-radius: 999px;
  background: var(--brand-tint);
  overflow: hidden;
}

.bar span {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--brand);
}

/* Pledge strip */
.pledge {
  background: var(--brand);
  color: #fff;
  text-align: center;
}

.pledge h2,
.pledge p {
  color: #fff;
}

.pledge p {
  max-width: 52ch;
  margin-inline: auto;
  opacity: 0.92;
  margin-bottom: 0;
}

/* Pricing */
.pricing-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: start;
}

.plan {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2rem);
  box-shadow: var(--shadow);
}

.plan.featured {
  border-color: var(--brand);
  border-width: 2px;
}

.plan .eyebrow {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand);
  font-weight: 700;
  margin: 0 0 0.4rem;
}

.plan .price {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0;
}

.plan .price small {
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink-muted);
}

.plan ul {
  list-style: none;
  padding: 0;
  margin: 1.1rem 0 0;
  display: grid;
  gap: 0.6rem;
}

.plan li {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
  color: var(--ink-muted);
  font-size: 0.96rem;
}

.plan li svg {
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  color: var(--brand);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--card);
  padding-block: 2.5rem;
  font-size: 0.92rem;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
}

.site-footer .foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}

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

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

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

/* Section heading helpers */
.section-head {
  max-width: 46ch;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.section-head.centered {
  margin-inline: auto;
  text-align: center;
}

.section-head p {
  color: var(--ink-muted);
  margin: 0;
}

.eyebrow {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand);
  font-weight: 700;
  margin: 0 0 0.6rem;
}

/* Legal / long-form content */
.legal {
  max-width: 760px;
}

.legal h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
}

.legal .updated {
  color: var(--ink-muted);
  font-size: 0.92rem;
  margin-top: -0.4rem;
}

.legal h2 {
  font-size: 1.4rem;
  margin-top: 2.4rem;
  scroll-margin-top: 80px;
}

.legal h3 {
  font-size: 1.1rem;
  margin-top: 1.6rem;
}

.legal ul,
.legal ol {
  padding-left: 1.3rem;
}

.legal li {
  margin-bottom: 0.4rem;
}

.summary-box {
  background: var(--brand-tint);
  border: 1px solid color-mix(in srgb, var(--brand) 25%, transparent);
  border-radius: var(--radius);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  margin-bottom: 2.5rem;
}

.summary-box h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

.summary-box ul {
  margin-bottom: 0;
}

.callout {
  border: 2px solid var(--warn);
  border-radius: var(--radius);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: color-mix(in srgb, var(--warn) 8%, var(--card));
  margin: 2rem 0;
}

.callout h2,
.callout h3 {
  margin-top: 0;
}

.callout strong {
  color: var(--ink);
}

/* 404 */
.notfound {
  text-align: center;
  padding-block: clamp(4rem, 12vw, 8rem);
}

.notfound .logomark {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
}

/* Focus visibility */
:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}