/* SheetShow site. Colours: the app's dusky grey / blue theme (Theme.kt)
   for dark mode, the icon's cream paper for light mode, the cat's orange as accent. */

:root {
  --bg: #FBF6EA;
  --bg-alt: #F2EBDA;
  --card: #FFFFFF;
  --text: #1F2A44;
  --muted: #55607A;
  --line: #E1D8C4;
  --primary: #2A6F6A;      /* icon teal */
  --primary-text: #FFFFFF;
  --accent: #C9631F;       /* cat orange, darkened for text contrast on cream */
  --accent-soft: #E8833A;
  --tablet: #12192B;
  --paper: #FBF6EA;
  --ink: #1F2A44;
  --draft-bg: #FFF1DC;
  --draft-line: #E8B27A;
  --shadow: 0 1px 2px rgba(18, 25, 43, .06), 0 8px 24px rgba(18, 25, 43, .08);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #29323C;          /* app background */
    --bg-alt: #2D3640;      /* surfaceContainerLow */
    --card: #313B46;        /* surfaceContainer */
    --text: #DDE3E9;        /* onBackground */
    --muted: #B9C4CE;       /* onSurfaceVariant */
    --line: #4B5763;        /* outlineVariant */
    --primary: #9DBBDD;     /* app primary */
    --primary-text: #13263A;
    --accent: #F0A066;
    --accent-soft: #E8833A;
    --tablet: #12192B;
    --draft-bg: #3E3A33;
    --draft-line: #8C6A45;
    --shadow: 0 1px 2px rgba(0, 0, 0, .2), 0 8px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

a { color: var(--primary); }
a:hover { text-decoration-thickness: 2px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 720px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 20px; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.site-header nav { display: flex; gap: 20px; font-size: 15px; }
.site-header nav a { color: var(--muted); text-decoration: none; }
.site-header nav a:hover { color: var(--text); }

/* Hero */
.hero { padding: 64px 0 56px; }
.hero .wrap { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; }
.eyebrow { color: var(--accent); font-weight: 700; letter-spacing: .04em; text-transform: uppercase; font-size: 14px; margin: 0 0 12px; }
h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.1; margin: 0 0 18px; letter-spacing: -.01em; }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; }
.badges { display: flex; flex-wrap: wrap; gap: 12px; }
.badge {
  display: inline-flex; flex-direction: column; justify-content: center;
  padding: 10px 18px; border-radius: 12px; border: 1px solid var(--line); background: var(--card);
  line-height: 1.25; min-width: 170px;
}
.badge small { color: var(--muted); font-size: 12px; }
.badge strong { font-size: 16px; }

.book-art { width: 100%; height: auto; }
.book-art .tablet { fill: var(--tablet); }
.book-art .paper { fill: var(--paper); }
.book-art .staff { stroke: var(--ink); stroke-width: 1.6; stroke-linecap: round; opacity: .75; }
.book-art .note { fill: var(--ink); }
.book-art .stem { stroke: var(--ink); stroke-width: 2; }
.book-art .num { fill: var(--muted); font: 600 14px system-ui, sans-serif; }
.book-art .turn { stroke: var(--accent-soft); stroke-width: 3; fill: none; stroke-linecap: round; }
.book-art .turn-head { fill: var(--accent-soft); }
.book-art .hl { fill: #F5D547; opacity: .55; }
.book-art .pen { stroke: #D23B3B; stroke-width: 2.4; fill: none; stroke-linecap: round; }

/* Sections */
section { padding: 64px 0; }
section.alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: clamp(26px, 3.4vw, 34px); line-height: 1.2; margin: 0 0 12px; }
.section-lead { color: var(--muted); margin: 0 0 36px; max-width: 680px; }

/* Book mode explainer */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 22px; box-shadow: var(--shadow); }
.step .n {
  display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: var(--accent-soft); color: #12192B; font-weight: 700; margin-bottom: 10px;
}
.step h3 { margin: 0 0 6px; font-size: 18px; }
.step p { margin: 0; color: var(--muted); font-size: 16px; }

.bm-grid { display: grid; grid-template-columns: 1fr 360px; gap: 40px; align-items: start; }
.bm-grid .steps { grid-template-columns: 1fr; gap: 16px; }
.bm-shot .frame { aspect-ratio: 1 / 1; }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 22px; }
.feature h3 { margin: 0 0 6px; font-size: 18px; display: flex; align-items: center; gap: 10px; }
.feature h3::before { content: ""; width: 10px; height: 10px; border-radius: 3px; background: var(--primary); flex: none; }
.feature p { margin: 0; color: var(--muted); font-size: 16px; }

/* Screenshots: an image shows by itself once the file exists in images/screenshots/;
   until then the figure shows a marked placeholder. */
.shots { display: grid; grid-template-columns: repeat(6, 1fr); gap: 24px; }
.shot.wide { grid-column: span 6; }
.shot.land { grid-column: span 2; }
.shot.tall { grid-column: span 2; }
.shot.half { grid-column: span 3; }
.shot.strip { grid-column: span 6; }
.shot { margin: 0; }
.shot .frame {
  border-radius: 16px; overflow: hidden; background: var(--tablet); padding: 10px;
  box-shadow: var(--shadow); aspect-ratio: 3 / 4; display: grid; place-items: center;
}
.shot.wide .frame { aspect-ratio: 16 / 9; }
.shot.land .frame { aspect-ratio: 3 / 2; }
.shot.tall .frame { aspect-ratio: 4 / 5; }
.shot.half .frame { aspect-ratio: 3 / 2; }
.shot.strip .frame { aspect-ratio: 1200 / 230; }
.shot .frame img { width: 100%; height: 100%; object-fit: contain; border-radius: 8px; }
.shot .placeholder { display: none; }
.shot.missing .frame img { display: none; }
.shot.missing .frame { background: transparent; border: 2px dashed var(--line); box-shadow: none; }
.shot.missing .placeholder { display: block; text-align: center; color: var(--muted); font-size: 15px; padding: 16px; }
.shot.missing .placeholder strong { display: block; color: var(--text); font-size: 13px; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 4px; }
.shot figcaption { margin-top: 10px; font-size: 15px; color: var(--muted); }
.shot figcaption b { color: var(--text); }

/* Coming soon */
.cta { text-align: center; }
.cta .badges { justify-content: center; margin-top: 24px; }
.cta img.big-icon { width: 96px; height: 96px; border-radius: 22px; margin: 0 auto 18px; box-shadow: var(--shadow); }

/* Privacy page */
.doc { padding: 48px 0 64px; }
.doc h1 { font-size: clamp(30px, 4.4vw, 42px); }
.doc h2 { font-size: 22px; margin: 36px 0 8px; }
.doc p, .doc li { color: var(--text); }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.updated { color: var(--muted); margin-top: -8px; }
.draft {
  background: var(--draft-bg); border: 1px solid var(--draft-line); border-radius: 12px;
  padding: 12px 16px; margin: 0 0 28px; font-size: 15px;
}
.todo { background: var(--draft-bg); border-bottom: 2px dotted var(--draft-line); padding: 0 3px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 15px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; align-items: center; }
.site-footer a { color: var(--muted); }
.site-footer .links { display: flex; gap: 20px; }

/* Tablets in portrait, phones */
@media (max-width: 880px) {
  .hero { padding: 40px 0 40px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 32px; }
  .steps, .features { grid-template-columns: 1fr 1fr; }
  .shot.land { grid-column: span 6; }
  .bm-grid { grid-template-columns: 1fr; }
  .bm-shot { max-width: 520px; width: 100%; margin: 0 auto; }
  .bm-grid .steps { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .site-header nav a.hide-sm { display: none; }
  .steps, .features { grid-template-columns: 1fr; }
  .shot.tall, .shot.half { grid-column: span 6; }
  .bm-grid .steps { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .badge { min-width: 0; flex: 1 1 140px; }
}