:root {
  --color-bg: #fff;
  --color-surface: #fff;
  --color-text: #000;
  --color-cell-border: rgba(0, 0, 0, 0.28);
  --color-cell-passed: rgba(0, 0, 0, 0.72);
  --color-cell-current: #000;
  --color-muted: rgba(0, 0, 0, 0.4);
  --color-accent: #000;
  --color-input-bg: #fff;
  --color-input-border: rgba(0, 0, 0, 0.2);
  --color-input-text: #000;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
}

*, *::after, *::before {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 3px; height: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-muted); border-radius: 99px; }
* { scrollbar-width: thin; scrollbar-color: var(--color-muted) transparent; }

html {
  background: var(--color-bg);
  min-height: 100vh;
}

body {
  color: var(--color-text);
  font-family: var(--font-ui);
}

.scale-wrapper {
  transform-origin: top center;
}

/* ── Container ─────────────────────────────────────────── */
.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0 auto;
  padding: 1rem 0 3rem;
}

/* ── Header ─────────────────────────────────────────────── */
.header-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0 0.25rem;
  position: relative;
}

.header {
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 18px;
  font-weight: 700;
  font-size: 4rem;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}


.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.45;
  transition: opacity 150ms;
  padding: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  border-radius: 6px;
}
.icon-btn:hover { opacity: 1; }

/* ── Stats counter ──────────────────────────────────────── */
.stats {
  font-size: 0.95rem;
  letter-spacing: 1px;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

/* ── Grid ───────────────────────────────────────────────── */
.plot {
  position: relative;
}

.row {
  position: relative;
  display: flex;
  align-items: center;
}

/* year label sits to the left */
.row .year {
  position: absolute;
  left: -2.2rem;
  font-size: 0.7rem;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
  display: none;
}
.row:nth-child(5n + 1) .year { display: block; }
.row:first-child .year       { display: none; }

/* header row — week-number labels */
.row--header {
  margin-bottom: 6px;
}
.week--label {
  width: 12px;
  height: 16px;
  margin: 3px;
  display: inline-block;
  position: relative;
  font-size: 0;
}
.week--label-visible {
  font-size: 10px;
  color: var(--color-muted);
  text-align: center;
  line-height: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

/* slight gap every 10 years */
.row:nth-child(10n + 2) { margin-top: 4px; }

/* ── Week cells ─────────────────────────────────────────── */
.week {
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-cell-border);
  margin: 3px;
  border-radius: 3px;
  flex-shrink: 0;
}

.week--passed  { background: var(--color-cell-passed); }

.week--current {
  background: var(--color-cell-current);
  outline: 2px solid var(--color-cell-current);
  outline-offset: 2px;
}

/* month groupings: extra gap after every 4th week */
.row--header .week--label:nth-child(4n),
.row:not(.row--header) .week:nth-child(4n+1) {
  margin-right: 7px;
}

/* 53rd-week overflow cell — no extra left margin; month-gap on week 52 already separates it */
.week--overflow {}

/* ── Footer ─────────────────────────────────────────────── */
.footer {
  text-align: center;
  font-size: 1rem;
  padding: 2.5rem 0 0;
  text-transform: uppercase;
}
.footer h4 {
  letter-spacing: 2px;
  font-size: 1.25rem;
  opacity: 0.6;
}
.footer-date {
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  letter-spacing: 1px;
}

/* ── Onboarding ─────────────────────────────────────────── */
.onboarding {
  position: fixed;
  inset: 0;
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 2rem;
}
.onboarding.hidden { display: none; }

.ob-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  width: 100%;
  max-width: 480px;
  animation: ob-in 300ms ease both;
}
.ob-step--hidden { display: none; }
.ob-step--out    { display: none; }

@keyframes ob-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ob-heading {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.5px;
}

.ob-date-input,
.ob-life-num,
.sp-input,
.sp-life-num {
  padding: 0.65rem 1rem;
  font-size: 1.1rem;
  background: var(--color-input-bg);
  color: var(--color-input-text);
  border: 2px solid var(--color-input-border);
  border-radius: 10px;
  outline: none;
  font-family: var(--font-ui);
  transition: border-color 150ms;
}
.ob-date-input:focus,
.ob-life-num:focus,
.sp-input:focus,
.sp-life-num:focus { border-color: var(--color-accent); }

.ob-date-input { width: 100%; max-width: 280px; text-align: center; }

.ob-life-row,
.sp-life-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.ob-life-num  { width: 100px; text-align: center; }
.ob-life-unit,
.sp-life-unit { font-size: 1rem; color: var(--color-muted); }

.ob-slider,
.sp-slider {
  width: 100%;
  max-width: 320px;
  accent-color: var(--color-accent);
}

.ob-btn {
  padding: 0.75rem 2.5rem;
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 1px;
  background: var(--color-accent);
  color: var(--color-surface);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: opacity 150ms;
}
.ob-btn:hover { opacity: 0.8; }

.ob-dots {
  position: fixed;
  bottom: 2.5rem;
  display: flex;
  gap: 0.5rem;
}
.ob-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-input-border);
  transition: background 200ms;
}
.ob-dot--active { background: var(--color-accent); }

/* ── Settings panel ─────────────────────────────────────── */
.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 199;
  backdrop-filter: blur(2px);
}
.settings-overlay.hidden { display: none; }

.settings-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: 320px;
  background: var(--color-surface);
  z-index: 200;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: -4px 0 24px rgba(0,0,0,0.1);
  transform: translateX(100%);
  transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1);
}
.settings-panel.sp--open { transform: translateX(0); }

.sp-close {
  align-self: flex-end;
  background: none;
  border: none;
  font-size: 1.75rem;
  cursor: pointer;
  line-height: 1;
  color: var(--color-muted);
  transition: color 150ms;
}
.sp-close:hover { color: var(--color-text); }

.sp-heading {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.25px;
}

.sp-label {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-muted);
}
.sp-input { width: 100%; }
.sp-life-num { width: 90px; }
.sp-slider { width: 100%; accent-color: var(--color-accent); margin-top: 0.25rem; }

/* theme swatches */
.sp-swatches {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.swatch {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 150ms, box-shadow 150ms;
  padding: 0;
}
.swatch:hover { transform: scale(1.15); }
.swatch--active {
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 4px var(--color-text);
}
.swatch[data-theme-value="light"]    { background: #f0f0f0; border-color: #ccc; }
.swatch[data-theme-value="dark"]     { background: #1a1a1a; border-color: #444; }
.swatch[data-theme-value="midnight"] { background: linear-gradient(135deg, #06091a, #0f1535); }
.swatch[data-theme-value="forest"]   { background: linear-gradient(135deg, #030e07, #0a2010); }
.swatch[data-theme-value="ocean"]    { background: linear-gradient(135deg, #020b18, #0a8a9a); }

.sp-bg-row {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}
.sp-bg-row .sp-input { flex: 1; font-size: 0.85rem; padding: 0.5rem 0.75rem; }
.sp-bg-clear {
  flex-shrink: 0;
  background: none;
  border: 2px solid var(--color-input-border);
  border-radius: 8px;
  color: var(--color-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.4rem 0.55rem;
  transition: color 150ms, border-color 150ms;
}
.sp-bg-clear:hover { color: var(--color-text); border-color: var(--color-text); }

.sp-reset {
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--color-muted);
  text-decoration: underline;
  cursor: pointer;
}
.sp-reset:hover { color: var(--color-text); }

/* ── Themes ─────────────────────────────────────────────── */
[data-theme="dark"] {
  --color-bg: #111;
  --color-surface: #1c1c1c;
  --color-text: #f0f0f0;
  --color-cell-border: rgba(255, 255, 255, 0.22);
  --color-cell-passed: rgba(255, 255, 255, 0.78);
  --color-cell-current: #fff;
  --color-muted: rgba(255, 255, 255, 0.42);
  --color-accent: #f0f0f0;
  --color-input-bg: #2a2a2a;
  --color-input-border: rgba(255, 255, 255, 0.18);
  --color-input-text: #f0f0f0;
}

[data-theme="midnight"] {
  --color-bg: linear-gradient(160deg, #06091a 0%, #0f1535 45%, #080e28 100%);
  --color-surface: rgba(8, 11, 30, 0.96);
  --color-text: #bfceff;
  --color-cell-border: rgba(100, 130, 255, 0.28);
  --color-cell-passed: rgba(110, 145, 255, 0.8);
  --color-cell-current: #8fa8ff;
  --color-muted: rgba(140, 165, 255, 0.5);
  --color-accent: #8fa8ff;
  --color-input-bg: rgba(255, 255, 255, 0.06);
  --color-input-border: rgba(100, 130, 255, 0.25);
  --color-input-text: #bfceff;
}

[data-theme="forest"] {
  --color-bg: linear-gradient(160deg, #030e07 0%, #0a2010 45%, #051208 100%);
  --color-surface: rgba(4, 14, 8, 0.96);
  --color-text: #a8e8b8;
  --color-cell-border: rgba(60, 185, 85, 0.28);
  --color-cell-passed: rgba(70, 205, 100, 0.78);
  --color-cell-current: #5ee87a;
  --color-muted: rgba(100, 205, 125, 0.5);
  --color-accent: #5ee87a;
  --color-input-bg: rgba(255, 255, 255, 0.06);
  --color-input-border: rgba(60, 185, 85, 0.25);
  --color-input-text: #a8e8b8;
}

[data-theme="ocean"] {
  --color-bg: linear-gradient(160deg, #020b18 0%, #0a2a4a 35%, #0d5070 70%, #0a8a9a 100%);
  --color-surface: rgba(2, 12, 28, 0.95);
  --color-text: #d0f0ff;
  --color-cell-border: rgba(60, 180, 255, 0.28);
  --color-cell-passed: rgba(60, 190, 255, 0.75);
  --color-cell-current: #7de3ff;
  --color-muted: rgba(120, 200, 255, 0.5);
  --color-accent: #7de3ff;
  --color-input-bg: rgba(255, 255, 255, 0.07);
  --color-input-border: rgba(60, 180, 255, 0.25);
  --color-input-text: #d0f0ff;
}

/* ── Utility ────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Print ──────────────────────────────────────────────── */
@media print {
  @page { margin: 1cm; }

  /* Force light theme — override CSS variables and concrete properties */
  html {
    background: #fff !important;
    --color-bg: #fff !important;
    --color-surface: #fff !important;
    --color-text: #000 !important;
    --color-cell-border: rgba(0, 0, 0, 0.28) !important;
    --color-cell-passed: rgba(0, 0, 0, 0.72) !important;
    --color-cell-current: #000 !important;
    --color-muted: rgba(0, 0, 0, 0.4) !important;
    --color-accent: #000 !important;
  }

  /* Force background fills to print without needing "Background graphics" enabled */
  * {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  /* Direct overrides as fallback (custom property !important can be patchy) */
  .week          { border-color: rgba(0, 0, 0, 0.28) !important; background: transparent !important; }
  .week--passed  { background: rgba(0, 0, 0, 0.72) !important; }
  .week--current { background: #000 !important; outline-color: #000 !important; }
  .week--label-visible,
  .row .year,
  .stats, .header, .footer h4 { color: #000 !important; }

  /* Hide all UI chrome */
  .onboarding,
  .settings-panel,
  .settings-overlay,
  .header-actions,
  .stats { display: none !important; }

  /* Strip the responsive JS transform — beforeprint applies its own */
  .scale-wrapper {
    transform: none !important;
    margin-bottom: 0 !important;
  }

  /* shrink container to its content so zoom fills the page, not the viewport */
  .container {
    width: fit-content !important;
    margin: 0 auto !important;
    break-inside: avoid;
    page-break-inside: avoid;
  }
}