:root {
  --bg: #f3f7f4;
  --surface: #ffffff;
  --text: #1c2b22;
  --muted: #5d7266;
  --primary: #1a7a4c;
  --primary-soft: #e4f5ec;
  --accent: #f0a202;
  --danger: #c44536;
  --shadow: 0 8px 24px rgba(28, 43, 34, 0.08);
  --radius: 18px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background:
    radial-gradient(circle at top right, #d8f3e4 0%, transparent 40%),
    radial-gradient(circle at bottom left, #fff1cc 0%, transparent 35%),
    var(--bg);
  color: var(--text);
}

body {
  padding: 16px 16px calc(28px + var(--safe-bottom));
}

.app {
  max-width: 480px;
  margin: 0 auto;
}

.header {
  margin-bottom: 18px;
}

.header h1 {
  margin: 0;
  font-size: 1.65rem;
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.summary-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.summary-card .label {
  color: var(--muted);
  font-size: 0.85rem;
}

.summary-card strong {
  font-size: 2rem;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.summary-card .unit {
  color: var(--muted);
  font-size: 0.85rem;
}

.summary-card.today {
  background: linear-gradient(160deg, #1a7a4c, #146340);
  color: #fff;
}

.summary-card.today .label,
.summary-card.today .unit {
  color: rgba(255, 255, 255, 0.8);
}

.date-bar {
  display: grid;
  grid-template-columns: 44px 1fr 44px auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 18px;
}

.date-nav,
.today-btn,
.ghost-btn,
.counter-btn,
.reset-btn {
  border: none;
  cursor: pointer;
  font: inherit;
}

.date-nav {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  font-size: 1.5rem;
  color: var(--primary);
}

#date-picker {
  width: 100%;
  height: 44px;
  border: 1px solid #d5e3da;
  border-radius: 12px;
  padding: 0 12px;
  font: inherit;
  background: var(--surface);
  color: var(--text);
}

.today-btn {
  height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  white-space: nowrap;
}

.exercises {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.exercise-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

.exercise-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.exercise-name {
  margin: 0;
  font-size: 1.08rem;
}

.exercise-meta {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.exercise-kcal {
  text-align: right;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.counter-row {
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  gap: 10px;
  align-items: center;
}

.counter-btn {
  height: 56px;
  border-radius: 16px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 1.8rem;
  font-weight: 700;
  transition: transform 0.08s ease, background 0.15s ease;
}

.counter-btn:active {
  transform: scale(0.96);
}

.counter-btn.plus {
  background: var(--primary);
  color: #fff;
}

.counter-value {
  text-align: center;
  font-size: 1.8rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.exercise-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.reset-btn {
  background: transparent;
  color: var(--muted);
  font-size: 0.82rem;
  padding: 4px 8px;
}

.reset-btn:hover {
  color: var(--danger);
}

.history {
  margin-top: 24px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.history-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

.ghost-btn {
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 999px;
  padding: 8px 14px;
  font-weight: 700;
  font-size: 0.85rem;
}

.history-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-list.hidden {
  display: none;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border-radius: 12px;
  background: var(--bg);
  cursor: pointer;
}

.history-item:hover {
  background: var(--primary-soft);
}

.history-item .date {
  font-weight: 700;
}

.history-item .kcal {
  color: var(--primary);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.history-empty {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 8px 0;
}

.footer {
  margin-top: 22px;
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
}

.footer p {
  margin: 4px 0;
}

.install-hint {
  line-height: 1.5;
}

@media (min-width: 520px) {
  body {
    padding-top: 28px;
  }
}