/* ── Reset & Telegram-native theming ─────────────────────────── */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--tg-theme-bg-color, #ffffff);
  color: var(--tg-theme-text-color, #000000);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Tab navigation ──────────────────────────────────────────── */

#tabs {
  display: flex;
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--tg-theme-hint-color, #999999)33;
}

.tab {
  flex: 1;
  padding: 12px 0;
  border: none;
  background: none;
  color: var(--tg-theme-hint-color, #999999);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  border-bottom: 2px solid transparent;
}

.tab.active {
  color: var(--tg-theme-button-color, #3390ec);
  border-bottom-color: var(--tg-theme-button-color, #3390ec);
}

/* ── Views ───────────────────────────────────────────────────── */

.view {
  display: none;
  padding: 16px;
  padding-bottom: 32px;
}

.view.active {
  display: block;
}

/* ── Cards ───────────────────────────────────────────────────── */

.card {
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
}

/* ── Buttons ─────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  padding: 12px 20px;
  width: 100%;
  transition: opacity 0.15s;
}

.btn:active {
  opacity: 0.7;
}

.btn-primary {
  background: var(--tg-theme-button-color, #3390ec);
  color: var(--tg-theme-button-text-color, #ffffff);
}

.btn-danger {
  background: #e53935;
  color: #ffffff;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  width: auto;
}

/* ── Inputs ──────────────────────────────────────────────────── */

.input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1.5px solid var(--tg-theme-hint-color, #999999)44;
  background: var(--tg-theme-bg-color, #ffffff);
  color: var(--tg-theme-text-color, #000000);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
}

.input:focus {
  border-color: var(--tg-theme-button-color, #3390ec);
}

select.input {
  cursor: pointer;
}

/* ── Workout view specifics ──────────────────────────────────── */

.workout-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  border-radius: 12px;
}

#workout-timer {
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.set-inputs {
  display: flex;
  gap: 12px;
  margin: 12px 0;
}

.input-group {
  flex: 1;
}

.input-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--tg-theme-hint-color, #999999);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Set list items ──────────────────────────────────────────── */

.exercise-group {
  margin-bottom: 16px;
}

.exercise-group-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--tg-theme-hint-color, #999999);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.set-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  border-radius: 10px;
  margin-bottom: 4px;
  font-size: 15px;
}

.set-item .set-number {
  color: var(--tg-theme-hint-color, #999999);
  font-weight: 600;
  min-width: 50px;
}

.set-item .set-detail {
  font-weight: 600;
}

.set-item .set-delete {
  background: none;
  border: none;
  color: #e53935;
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}

/* ── Exercise list ───────────────────────────────────────────── */

.add-exercise-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.add-exercise-row .input {
  flex: 1;
}

.exercise-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  border-radius: 10px;
  margin-bottom: 4px;
  font-size: 15px;
  font-weight: 500;
}

.exercise-item .exercise-delete {
  background: none;
  border: none;
  color: var(--tg-theme-hint-color, #999999);
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
}

/* ── History ─────────────────────────────────────────────────── */

.history-card {
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
}

.history-card-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}

.history-date {
  font-size: 13px;
  color: var(--tg-theme-hint-color, #999999);
}

.history-volume {
  font-size: 13px;
  font-weight: 600;
  color: var(--tg-theme-button-color, #3390ec);
}

.history-exercise {
  margin-bottom: 6px;
}

.history-exercise-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}

.history-exercise-sets {
  font-size: 13px;
  color: var(--tg-theme-hint-color, #999999);
}

/* ── Empty state ─────────────────────────────────────────────── */

.empty-state {
  text-align: center;
  padding: 48px 16px;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.empty-state p {
  color: var(--tg-theme-hint-color, #999999);
  font-size: 16px;
  margin-bottom: 20px;
}

/* ── Haptic-like tap feedback ────────────────────────────────── */

.btn:active,
.tab:active,
.set-delete:active,
.exercise-delete:active {
  transform: scale(0.97);
}

/* ── Toast notification ──────────────────────────────────────── */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--tg-theme-text-color, #000000);
  color: var(--tg-theme-bg-color, #ffffff);
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}