/* ── Variables ───────────────────────────────────────────────────────────── */
:root {
  --bg:            #0d1117;
  --text:          #c9d1d9;
  --accent:        #58a6ff;
  --card:          #161b22;
  --border:        #30363d;
  --muted:         #8b949e;
  --surface:       #21262d;
  --nav-clearance: 4rem;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg:      #ffffff;
    --text:    #0d1117;
    --accent:  #0969da;
    --card:    #f6f8fa;
    --border:  #d0d7de;
    --muted:   #57606a;
    --surface: #ffffff;
  }
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ── Shared layout classes ───────────────────────────────────────────────── */
.layout-portrait  { flex-direction: column; }
.layout-landscape { flex-direction: row; }

/* ── Nav bar ─────────────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 0.75rem;
  background: var(--bg);
  z-index: 100;
}
.nav-top    { top: 0;    border-bottom: 1px solid var(--border); }
.nav-bottom { bottom: 0; border-top:    1px solid var(--border); }

.nav a {
  color: var(--muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  transition: color 0.15s;
}
.nav a:hover  { color: var(--text); }
.nav a.active { color: var(--accent); }

/* ── Clock page (desk-clock.html) ────────────────────────────────────────── */
.clock-page {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: var(--nav-clearance);
}

.clock-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  width: 100%;
  height: 100%;
}

/* Date panels — base */
.clock-date {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.5rem;
}

.clock-face {
  flex: 1.8;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Portrait: tighter flex ratios pull dates closer to clock */
.clock-layout.layout-portrait .clock-date {
  flex: 0.6;
}
.clock-layout.layout-portrait .clock-face {
  flex: 1;
}
.clock-layout.layout-portrait .clock-date:first-child {
  align-items: flex-end;
  padding-bottom: 0.25rem;
}
.clock-layout.layout-portrait .clock-date:last-child {
  align-items: flex-start;
  padding-top: 0.25rem;
}

/* Landscape: dates pushed inward toward clock */
.clock-layout.layout-landscape .clock-date:first-child {
  justify-content: flex-end;
  padding-right: 1.5rem;
}
.clock-layout.layout-landscape .clock-date:last-child {
  justify-content: flex-start;
  padding-left: 1.5rem;
}

.clock {
  font-size: clamp(4rem, 28vw, 22rem);
  font-weight: 700;
  letter-spacing: 4px;
  margin: 0;
  color: var(--text);
  line-height: 1;
  cursor: pointer;
  user-select: none;
}
.clock-layout.layout-landscape .clock {
  font-size: clamp(4rem, 22vh, 18rem);
}
.clock sup.ampm {
  font-size: 0.25em;
  font-weight: 400;
  vertical-align: super;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.date-line {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  text-align: center;
}
.date-line .label {
  font-weight: bold;
  color: var(--accent);
  font-size: clamp(0.6rem, 1.2vw, 1rem);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.date-line .value {
  font-size: clamp(0.9rem, 2.5vw, 2rem);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.15s;
}
.date-line .value:hover { opacity: 0.7; }

/* ── Calendars page (calendars.html) ─────────────────────────────────────── */
.calendars-page {
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 0.5rem 0.5rem var(--nav-clearance);
}

.conversion-display {
  text-align: center;
  font-family: monospace;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
  min-height: 1.2em;
  flex-shrink: 0;
}

.calendars {
  display: flex;
  gap: 0;
  flex: 1;
  min-height: 0;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
}

.cal {
  flex: 1;
  min-height: 0;
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Separator and border radius — landscape */
.calendars.layout-landscape .cal:first-child { border-radius: 12px 0 0 12px; }
.calendars.layout-landscape .cal + .cal      { border-left: 1px solid var(--border); border-radius: 0 12px 12px 0; }

/* Separator and border radius — portrait */
.calendars.layout-portrait .cal:first-child  { border-radius: 12px 12px 0 0; }
.calendars.layout-portrait .cal + .cal       { border-top: 1px solid var(--border); border-radius: 0 0 12px 12px; }

.cal h2 {
  text-align: center;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 0.5rem;
  flex-shrink: 0;
}

.cal-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
  flex-shrink: 0;
}
.cal-nav button {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  width: 26px;
  height: 26px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s;
}
.cal-nav button:hover         { border-color: var(--accent); color: var(--accent); }
.cal-nav select,
.cal-nav input[type="number"] {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.15rem 0.3rem;
  font-size: 0.8rem;
}
.cal-nav select               { flex: 1; }
.cal-nav input[type="number"] {
  width: 58px;
  text-align: center;
  -moz-appearance: textfield;
}
.cal-nav input[type="number"]::-webkit-inner-spin-button,
.cal-nav input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  margin-bottom: 0.15rem;
  flex-shrink: 0;
}
.weekdays span {
  text-align: center;
  font-size: 0.6rem;
  color: var(--muted);
  font-weight: bold;
  text-transform: uppercase;
  padding: 0.1rem 0;
}

.days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  flex: 1;
  min-height: 0;
}

.day {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-family: monospace;
  cursor: pointer;
  border-radius: 4px;
  border: 1px solid transparent;
  position: relative;
  user-select: none;
  transition: background 0.1s, border-color 0.1s;
}
.day:hover                 { background: var(--surface); border-color: var(--border); }
.day.empty                 { cursor: default; pointer-events: none; }
.day.selected              { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: bold; }
.day.today::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
}
.day.today.selected::after { background: #fff; }

.day.special {
  grid-column: 1 / -1;
  padding: 0.25rem;
  font-size: 0.6rem;
  font-weight: bold;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: var(--surface);
  border: 1px solid var(--border);
}
.day.special:hover         { border-color: var(--accent); }
.day.special.selected      { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── Small screen adjustments ────────────────────────────────────────────── */
@media (max-height: 700px) {
  .calendars-page {
    padding: 0.25rem 0.25rem var(--nav-clearance);
  }
  .conversion-display {
    margin-bottom: 0.25rem;
    font-size: 0.75rem;
  }
  .cal {
    padding: 0.4rem;
  }
  .cal h2 {
    margin: 0 0 0.25rem;
    font-size: 0.75rem;
  }
  .cal-nav {
    margin-bottom: 0.25rem;
  }
}

/* ── Info page (index.html) ──────────────────────────────────────────────── */
.info-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 1rem 1rem var(--nav-clearance);
}
#readme {
  background: var(--card);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border);
}
#readme h1, #readme h2, #readme h3 { color: var(--accent); }
#readme a                           { color: var(--accent); text-decoration: none; }
#readme a:hover                     { text-decoration: underline; }
#readme code {
  background: var(--bg);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}
#readme pre {
  background: var(--bg);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--border);
}