:root {
  color-scheme: light dark;
  --bg: #f2f2f7;
  --card: #fff;
  --label: #000;
  --secondary: rgba(60, 60, 67, 0.6);
  --tertiary: rgba(60, 60, 67, 0.3);
  --fill: rgba(120, 120, 128, 0.16);
  --accent: #007aff;
  --accent-fill: rgba(0, 122, 255, 0.12);
  --green: #34c759;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000;
    --card: #1c1c1e;
    --label: #fff;
    --secondary: rgba(235, 235, 245, 0.6);
    --tertiary: rgba(235, 235, 245, 0.3);
    --fill: rgba(120, 120, 128, 0.32);
    --accent: #0a84ff;
    --accent-fill: rgba(10, 132, 255, 0.28);
    --green: #30d158;
  }
}

* { box-sizing: border-box; }
html { touch-action: manipulation; }

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--label);
  font: 17px/1.3 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  width: min(640px, 100%);
  margin-inline: auto;
  padding: 40px 36px 48px 40px;
}

@media (max-width: 900px) {
  main { padding: 28px 20px 40px; }
}

button {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

h1 {
  margin: 0;
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.1;
}

.date {
  margin: 4px 0 0;
  color: var(--secondary);
  font-size: 15px;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
  padding: 12px 16px;
  min-height: 52px;
  background: var(--card);
  border-radius: 16px;
  color: inherit;
  text-decoration: none;
}

.row b { display: block; font-weight: 600; }
.row span { display: block; margin-top: 1px; color: var(--secondary); font-size: 13px; }
.chevron { color: var(--tertiary); font-size: 22px; line-height: 1; }

.card {
  margin-top: 12px;
  padding: 16px;
  background: var(--card);
  border-radius: 16px;
  cursor: pointer;
}

.top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

h2 { margin: 0; font-size: 17px; font-weight: 600; }
.streak { margin: 2px 0 0; color: var(--secondary); font-size: 15px; }

.stat { text-align: right; }
.stat b {
  display: block;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.4px;
  line-height: 1.1;
}
.stat span { color: var(--secondary); font-size: 13px; }

.refresh {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--fill);
  color: var(--accent);
  font-size: 24px;
}

.refresh:disabled { opacity: 0.5; }

.strip {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  margin-top: 18px;
  text-align: center;
}

.day { padding: 4px 0; }

.letter {
  display: block;
  color: var(--secondary);
  font-size: 11px;
  font-weight: 600;
}

.today .letter { color: var(--accent); }

.dot {
  display: block;
  width: 8px;
  height: 8px;
  margin: 8px auto 0;
  border: 1.5px solid var(--tertiary);
  border-radius: 50%;
}

.filled { background: var(--accent); border-color: var(--accent); }

.selected .dot {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.actions {
  display: flex;
  gap: 8px;
  margin-top: 20px;
}

.actions button, .presets button, .sheet-actions button {
  min-height: 44px;
  border-radius: 12px;
  font-weight: 600;
}

.actions .minus {
  flex: 1;
  background: var(--fill);
}

.primary {
  flex: 1;
  background: var(--accent);
  color: #fff;
}

.primary:disabled { opacity: 0.4; }

.tint {
  flex: 1;
  background: var(--accent-fill);
  color: var(--accent);
}

.edit {
  display: block;
  width: 100%;
  min-height: 44px;
  margin-top: 8px;
  color: var(--accent);
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 17px;
  text-decoration: none;
}

.back .chevron { color: inherit; }

.panel {
  margin-top: 24px;
  padding: 16px 16px 12px;
  background: var(--card);
  border-radius: 16px;
}

.section {
  margin: 28px 0 8px;
  color: var(--secondary);
  font-size: 13px;
  font-weight: 600;
}

.log {
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--card);
  border-radius: 16px;
}

.log li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  padding: 10px 16px;
}

.log li + li { box-shadow: inset 0 0.5px 0 var(--fill); }
.log span { color: var(--secondary); }
.log b { font-weight: 600; }

/* graph */

.panel .segments { margin-top: 0; }

.segments {
  display: flex;
  margin-top: 20px;
  padding: 2px;
  background: var(--fill);
  border-radius: 9px;
}

.segments button {
  flex: 1;
  min-height: 32px;
  border-radius: 7px;
  color: var(--label);
  font-size: 13px;
  font-weight: 600;
}

.segments .on { background: var(--card); box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15); }

.bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 220px;
  margin-top: 24px;
}

.bar {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
  min-width: 0;
}

.bar i {
  display: block;
  min-height: 2px;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
}

.bar span {
  display: block;
  height: 16px;
  margin-top: 6px;
  color: var(--secondary);
  font-size: 11px;
  text-align: center;
}

/* sheets */

dialog {
  width: min(360px, calc(100% - 40px));
  padding: 20px;
  border: 0;
  border-radius: 20px;
  background: var(--card);
  color: var(--label);
}

dialog::backdrop { background: rgba(0, 0, 0, 0.4); }

dialog h3 { margin: 0; font-size: 20px; font-weight: 600; }
.sheet-date { margin: 2px 0 0; color: var(--secondary); font-size: 15px; }

.presets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 16px;
}

dialog input[type="number"] {
  width: 100%;
  min-height: 44px;
  margin-top: 8px;
  padding: 0 12px;
  border: 0;
  border-radius: 12px;
  background: var(--fill);
  color: inherit;
  font: inherit;
}

.sheet-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
}

.switch-row input {
  position: relative;
  width: 51px;
  height: 31px;
  margin: 0;
  appearance: none;
  border-radius: 16px;
  background: var(--fill);
  cursor: pointer;
  transition: background 0.15s;
}

.switch-row input::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 27px;
  height: 27px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: left 0.15s;
}

.switch-row input:checked { background: var(--green); }
.switch-row input:checked::after { left: 22px; }
/* Login is shown by app.js before protected state is available. */
.login { max-width: 360px; margin: 18vh auto 0; display: grid; gap: 20px; padding: 28px; background: var(--card, #fff); border-radius: 24px; }
.login h1 { margin: 0; }
.login label { display: grid; gap: 8px; }
.login input { min-height: 48px; padding: 0 14px; border: 1px solid #d1d1d6; border-radius: 12px; font: inherit; }

.primary.completed { background: var(--fill); color: var(--secondary); }