:root {
  --bg: #14262F;
  --bg-line: rgba(232, 226, 208, 0.07);
  --paper: #E8E2D0;
  --line: #C9D8DC;
  --accent: #E8A33D;
  --good: #7FB77E;
  --muted: #6E8A94;
  --card-bg: #182D37;
  --card-border: rgba(232, 226, 208, 0.14);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  background-image:
    linear-gradient(var(--bg-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-line) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--paper);
  font-family: var(--font-body);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.sheet {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ---------- Title block ---------- */
.titleblock {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 28px;
  margin-bottom: 32px;
  gap: 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

h1 {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 700;
  margin: 6px 0 8px;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 40ch;
}

.titleblock__right {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  padding-top: 4px;
}

.plumb-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted);
  margin-top: 4px;
  text-align: center;
  white-space: nowrap;
}

#plumbString, #plumbBob {
  transition: transform 0.6s cubic-bezier(.25,.9,.3,1.2);
  transform-origin: 40px 4px;
}

/* ---------- Status strip ---------- */
.status-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--card-border);
  border: 1px solid var(--card-border);
  margin-bottom: 40px;
}

.status-cell {
  background: var(--card-bg);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.status-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
}

.status-num--small {
  font-size: 14px;
  color: var(--good);
}

.status-caption {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ---------- Program ---------- */
.program {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.day-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 24px;
}

.day-card__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
  flex-wrap: wrap;
  gap: 8px;
}

.day-card__head h3 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 0;
  font-weight: 600;
}

.day-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.day-card__sub {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 18px;
}

.exercise-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 18px;
}

.exercise-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 4px;
  border-bottom: 1px dashed var(--card-border);
  cursor: pointer;
}

.exercise-row:last-child { border-bottom: none; }

.exercise-row input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--muted);
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
}

.exercise-row input[type="checkbox"]:checked {
  background: var(--good);
  border-color: var(--good);
}

.exercise-row input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 4px;
  height: 8px;
  border: solid var(--bg);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.exercise-name {
  flex: 1;
  font-size: 14px;
}

.exercise-name.checked-text {
  color: var(--muted);
  text-decoration: line-through;
}

.exercise-detail {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.log-btn {
  width: 100%;
  padding: 13px;
  background: transparent;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.log-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.log-btn:not(:disabled):hover {
  background: var(--accent);
  color: var(--bg);
}

.log-btn.done {
  border-color: var(--good);
  color: var(--good);
  cursor: default;
}

/* ---------- History ---------- */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 6px;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0;
}

.section-note {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

.grid-strip {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
}

.week-box {
  aspect-ratio: 1;
  border: 1.5px solid var(--muted);
  position: relative;
}

.week-box[data-fill="full"] { background: var(--good); border-color: var(--good); }
.week-box[data-fill="half"] { background: linear-gradient(135deg, var(--good) 50%, transparent 50%); }
.week-box[data-fill="empty"] { background: transparent; }

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  padding-top: 24px;
  border-top: 1px solid var(--card-border);
}

@media (max-width: 600px) {
  h1 { font-size: 38px; }
  .status-strip { grid-template-columns: repeat(2, 1fr); }
  .grid-strip { grid-template-columns: repeat(5, 1fr); }
  .titleblock { flex-direction: column; }
}