/* Calm Calendar — site styles. No build step, no external resources. */

:root {
  color-scheme: light dark;

  --font: "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
  --mono: "Cascadia Mono", Consolas, ui-monospace, monospace;

  /* palette (from the app icon) */
  --graphite: #3F454D;
  --graphite-2: #4A5058;
  --teal: #4FA3A5;
  --mint: #7FD1CC;
  --pale-blue: #B9D6EF;

  /* light theme tokens */
  --bg: #F3F7FB;
  --bg-glow-1: rgba(185, 214, 239, 0.75);
  --bg-glow-2: rgba(127, 209, 204, 0.35);
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #FFFFFF;
  --surface-tint: #E4EFF8;
  --border: rgba(63, 69, 77, 0.12);
  --text: #1E2227;
  --text-muted: #4A5058;
  --accent: #2B6F72;          /* darkened teal: 5.6:1 on white */
  --accent-hover: #215A5D;
  --on-accent: #FFFFFF;
  --icon-bg: rgba(79, 163, 165, 0.14);
  --focus: #2B6F72;
  --shadow: 0 1px 2px rgba(30, 34, 39, 0.06), 0 12px 40px rgba(30, 34, 39, 0.10);
  --shadow-lg: 0 2px 6px rgba(30, 34, 39, 0.06), 0 30px 80px rgba(30, 34, 39, 0.18);

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --wrap: 1120px;
  --gutter: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #33383F;
    --bg-glow-1: rgba(79, 163, 165, 0.20);
    --bg-glow-2: rgba(185, 214, 239, 0.08);
    --surface: rgba(74, 80, 88, 0.62);
    --surface-solid: #4A5058;
    --surface-tint: #3F454D;
    --border: rgba(255, 255, 255, 0.10);
    --text: #F2F5F7;
    --text-muted: #C9D0D7;
    --accent: #7FD1CC;
    --accent-hover: #A2E0DC;
    --on-accent: #1E2227;
    --icon-bg: rgba(127, 209, 204, 0.14);
    --focus: #7FD1CC;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.25), 0 12px 40px rgba(0, 0, 0, 0.30);
    --shadow-lg: 0 2px 6px rgba(0, 0, 0, 0.30), 0 30px 80px rgba(0, 0, 0, 0.45);
  }
}

/* ---------- base ---------- */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(60rem 40rem at 85% -10%, var(--bg-glow-1), transparent 70%),
    radial-gradient(50rem 36rem at -10% 20%, var(--bg-glow-2), transparent 70%);
  background-repeat: no-repeat;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

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

a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-hover); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

h1, h2, h3 { line-height: 1.2; font-weight: 600; letter-spacing: -0.01em; margin: 0; }

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--surface-tint);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05em 0.35em;
  overflow-wrap: anywhere;
}

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--surface-solid);
  color: var(--text);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}
.skip-link:focus-visible { top: 0.5rem; }

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

/* ---------- header (acrylic) ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(20px);
  backdrop-filter: saturate(160%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  white-space: nowrap;
}
.brand:hover { color: var(--text); }
.brand img { width: 32px; height: 32px; border-radius: 8px; }

.site-nav ul {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  display: block;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--text); background: var(--surface); }
.site-nav a[aria-current="page"] { color: var(--text); font-weight: 600; }

@media (max-width: 480px) {
  .site-header .wrap { flex-wrap: wrap; gap: 0; padding-block: 0.4rem; }
  .site-nav { width: 100%; }
  .site-nav ul { margin-left: -0.5rem; }
  .site-nav a { padding: 0.35rem 0.5rem; font-size: 0.9rem; }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-sm);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}
.btn svg { width: 20px; height: 20px; flex: none; }

.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); color: var(--on-accent); }

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

.btn[aria-disabled="true"] {
  background: var(--surface);
  color: var(--text-muted);
  border-color: var(--border);
  cursor: not-allowed;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--icon-bg);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  white-space: nowrap;
}

/* ---------- hero ---------- */

.hero { padding-block: 4rem 3rem; text-align: center; }

.hero-icon {
  width: 104px;
  height: 104px;
  margin: 0 auto 1.25rem;
  filter: drop-shadow(0 10px 24px rgba(30, 34, 39, 0.18));
}

.hero h1 { font-size: clamp(2.25rem, 6vw, 3.5rem); }

.hero .lead {
  max-width: 40rem;
  margin: 1rem auto 0;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--text-muted);
}

.cta {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1rem;
}
.cta-store { display: inline-flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; justify-content: center; }

.shot {
  margin: 3rem auto 0;
  max-width: 1040px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  background: var(--surface-solid);
  aspect-ratio: 16 / 10;
}
.shot img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- sections ---------- */

.section { padding-block: 4.5rem; }
.section-head { max-width: 40rem; margin-bottom: 2.25rem; }
.section-head h2 { font-size: clamp(1.6rem, 3.5vw, 2.1rem); }
.section-head p { margin: 0.6rem 0 0; color: var(--text-muted); font-size: 1.05rem; }

.card {
  background: var(--surface);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* features */

.features-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}
@media (min-width: 960px) {
  .features-layout { grid-template-columns: 1fr 280px; gap: 2.5rem; }
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
@media (min-width: 640px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }

.feature { padding: 1.4rem; }
.feature h3 { font-size: 1.1rem; margin-top: 0.9rem; }
.feature p { margin: 0.4rem 0 0; color: var(--text-muted); }

.feature-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--icon-bg);
  color: var(--accent);
}
.feature-icon svg { width: 24px; height: 24px; }

.widget-shot { margin: 0 auto; max-width: 280px; text-align: center; }
.widget-shot img {
  width: 100%;
  aspect-ratio: 600 / 1202;
  object-fit: contain;
  filter: drop-shadow(0 20px 40px rgba(30, 34, 39, 0.22));
}
.widget-shot figcaption { margin-top: 0.9rem; font-size: 0.9rem; color: var(--text-muted); }

/* google data (verification) */

.data-band {
  background: color-mix(in srgb, var(--surface-tint) 80%, transparent);
  border-block: 1px solid var(--border);
}

.data-card { padding: clamp(1.25rem, 4vw, 2.5rem); max-width: 820px; }
.data-card h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); display: flex; align-items: center; gap: 0.75rem; }
.data-card h2 svg { width: 32px; height: 32px; color: var(--accent); flex: none; }
.data-card > p { margin: 1rem 0 0; }

.scope-list { list-style: none; margin: 1.25rem 0 0; padding: 0; display: grid; gap: 0.75rem; }
.scope-list li {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
}
.scope-list strong { display: block; }
.scope-list span { color: var(--text-muted); }

.data-card .more { margin-top: 1.5rem; font-weight: 600; }
.small-print {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* faq */

.faq { max-width: 820px; display: grid; gap: 0.75rem; }
.faq details { padding: 0; overflow: hidden; }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 1.25rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border-radius: var(--radius);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  width: 10px;
  height: 10px;
  flex: none;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg) translateY(-3px);
  transition: transform 0.2s;
}
.faq details[open] summary::after { transform: rotate(-135deg) translateY(-3px); }
.faq details > div { padding: 0 1.25rem 1.2rem; color: var(--text-muted); }
.faq details > div p { margin: 0; }

/* ---------- long-form (privacy, terms) ---------- */

.doc { padding-block: 3rem 4rem; }
.prose { max-width: 720px; margin-inline: auto; }

.doc-head h1 { font-size: clamp(2rem, 5vw, 2.6rem); }
.doc-meta { margin: 0.6rem 0 0; color: var(--text-muted); }

.toc { margin: 2rem 0 2.5rem; padding: 1.25rem 1.5rem; }
.prose .toc h2 { margin: 0; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.toc ol { margin: 0.75rem 0 0; padding-left: 1.25rem; columns: 2 220px; column-gap: 2rem; }
.toc li { margin: 0.2rem 0; break-inside: avoid; }

.prose h2 {
  font-size: 1.45rem;
  margin: 2.75rem 0 0.75rem;
  scroll-margin-top: 80px;
}
.prose p, .prose ul { margin: 0 0 1rem; }
.prose ul { padding-left: 1.25rem; }
.prose li { margin: 0.35rem 0; }

.summary-box { padding: 1.1rem 1.25rem; border-left: 4px solid var(--accent); }
.summary-box p { margin: 0; }

.table-wrap {
  margin: 1.25rem 0 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-solid);
}
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 0.85rem 1rem; }
thead th { background: var(--surface-tint); font-weight: 600; }
tbody tr + tr td, tbody tr + tr th { border-top: 1px solid var(--border); }
tbody th { font-weight: 400; width: 42%; }
tbody th strong { display: block; margin-top: 0.3rem; font-weight: 600; }

@media (max-width: 560px) {
  table, thead, tbody, tr, th, td { display: block; }
  thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  tbody th { width: auto; padding-bottom: 0.25rem; }
  tbody td { padding-top: 0.25rem; color: var(--text-muted); }
  tbody tr + tr { border-top: 1px solid var(--border); }
  tbody tr + tr td { border-top: 0; }
}

.back-top { margin-top: 3rem; font-size: 0.95rem; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
}
.site-footer p { margin: 0; }
.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--accent); }