/* BudgetTrackr support site — design system
   Palette sampled directly from the app icon gradient (#6AE098 → #0B754D). */

:root {
  --green-100: #eafff2;
  --green-200: #9be8bb;
  --green-300: #6ae098;
  --green-400: #3fc57e;
  --green-500: #2ca769;
  --green-600: #1f8a58;
  --green-700: #0b754d;
  --green-800: #095c3d;

  --bg: #0b0f0d;
  --bg-elevated: #121712;
  --surface: #161d18;
  --surface-2: #1d2620;
  --border: rgba(255, 255, 255, 0.08);
  --text-primary: rgba(255, 255, 255, 0.94);
  --text-secondary: rgba(255, 255, 255, 0.62);
  --text-tertiary: rgba(255, 255, 255, 0.4);
  --accent: var(--green-300);
  --accent-strong: var(--green-400);
  --shadow-color: rgba(0, 0, 0, 0.45);
  --focus-ring: rgba(106, 224, 152, 0.55);

  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1080px;

  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f5f7f5;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-2: #eef4f0;
  --border: rgba(11, 30, 20, 0.08);
  --text-primary: #0e1a13;
  --text-secondary: rgba(14, 26, 19, 0.64);
  --text-tertiary: rgba(14, 26, 19, 0.42);
  --accent: var(--green-600);
  --accent-strong: var(--green-700);
  --shadow-color: rgba(20, 40, 30, 0.12);
  --focus-ring: rgba(31, 138, 88, 0.4);
  color-scheme: light;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f5f7f5;
    --bg-elevated: #ffffff;
    --surface: #ffffff;
    --surface-2: #eef4f0;
    --border: rgba(11, 30, 20, 0.08);
    --text-primary: #0e1a13;
    --text-secondary: rgba(14, 26, 19, 0.64);
    --text-tertiary: rgba(14, 26, 19, 0.42);
    --accent: var(--green-600);
    --accent-strong: var(--green-700);
    --shadow-color: rgba(20, 40, 30, 0.12);
    --focus-ring: rgba(31, 138, 88, 0.4);
    color-scheme: light;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
    "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(106, 224, 152, 0.14), transparent 60%),
    var(--bg);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.25s ease, color 0.25s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  display: block;
}

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

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 6px;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

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

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 10px var(--shadow-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 14.5px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
  background: var(--surface-2);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links a.current {
  color: var(--text-primary);
  background: var(--surface-2);
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin-left: 8px;
  font-size: 16px;
  transition: transform 0.15s ease, background-color 0.2s ease;
}

.theme-toggle:hover {
  background: var(--surface-2);
  transform: scale(1.06);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

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

.hero {
  padding: 72px 0 40px;
  text-align: center;
}

.hero-logo {
  width: 96px;
  height: 96px;
  border-radius: 24px;
  margin: 0 auto 28px;
  box-shadow: 0 18px 40px var(--shadow-color);
  animation: float-in 0.7s ease both;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  line-height: 1.1;
}

.hero p.lead {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 32px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--green-300), var(--green-700));
  color: #06170f;
  box-shadow: 0 10px 24px rgba(11, 117, 77, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 14px 30px rgba(11, 117, 77, 0.45);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--surface-2);
}

/* ---------- Sections & cards ---------- */

section {
  padding: 36px 0;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

.section-sub {
  color: var(--text-secondary);
  font-size: 16px;
  margin: 0 0 32px;
  max-width: 640px;
  line-height: 1.6;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: 0 6px 20px var(--shadow-color);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px var(--shadow-color);
}

.card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent-strong);
  margin-bottom: 16px;
}

.card h3 {
  font-size: 17px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.card p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ---------- FAQ ---------- */

.faq {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 6px 20px var(--shadow-color);
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-family: inherit;
}

.faq-question:hover {
  background: var(--surface-2);
}

.faq-question .chev {
  flex-shrink: 0;
  transition: transform 0.25s ease;
  color: var(--text-tertiary);
}

.faq-item[open] .faq-question .chev {
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

.faq-answer p {
  margin: 0 0 10px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

details.faq-item summary {
  list-style: none;
}

details.faq-item summary::-webkit-details-marker {
  display: none;
}

/* ---------- Contact ---------- */

.contact-card {
  background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 14%, var(--surface)), var(--surface));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  box-shadow: 0 10px 30px var(--shadow-color);
}

.contact-card h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.contact-card p {
  color: var(--text-secondary);
  margin: 0 0 22px;
}

/* ---------- Legal content ---------- */

.legal {
  max-width: 760px;
  margin: 0 auto;
}

.legal h1 {
  font-size: clamp(28px, 4vw, 38px);
}

.legal .updated {
  color: var(--text-tertiary);
  font-size: 14px;
  margin-bottom: 40px;
}

.legal h2 {
  font-size: 20px;
  margin: 40px 0 12px;
  letter-spacing: -0.01em;
  scroll-margin-top: 90px;
}

.legal h2:first-of-type {
  margin-top: 0;
}

.legal p,
.legal li {
  color: var(--text-secondary);
  font-size: 15.5px;
  line-height: 1.75;
}

.legal ul {
  padding-left: 20px;
}

.legal strong {
  color: var(--text-primary);
}

.legal-toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 40px;
}

.legal-toc p {
  margin: 0 0 10px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.legal-toc ul {
  columns: 2;
  margin: 0;
  padding-left: 18px;
}

.legal-toc li {
  font-size: 14px;
  margin-bottom: 6px;
}

.callout {
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 18px 0;
}

.callout p {
  color: var(--text-primary);
  font-size: 14.5px;
  margin: 0;
}

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

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

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

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
}

.footer-copy {
  color: var(--text-tertiary);
  font-size: 13.5px;
}

/* ---------- 404 ---------- */

.error-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
}

.error-code {
  font-size: clamp(72px, 14vw, 120px);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--green-300), var(--green-700));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 0;
  line-height: 1;
}

/* ---------- Animations ---------- */

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-logo {
    animation: none;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 760px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 16px;
    right: 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    box-shadow: 0 16px 40px var(--shadow-color);
    display: none;
    gap: 2px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 16px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .legal-toc ul {
    columns: 1;
  }

  .contact-card {
    padding: 28px;
  }
}