/* =============================================
   CSS-переменные: подхватываем тему Telegram
   ============================================= */
:root {
  --bg:           var(--tg-theme-bg-color, #ffffff);
  --text:         var(--tg-theme-text-color, #222222);
  --hint:         var(--tg-theme-hint-color, #888888);
  --link:         var(--tg-theme-link-color, #2481cc);
  --btn-bg:       var(--tg-theme-button-color, #2481cc);
  --btn-text:     var(--tg-theme-button-text-color, #ffffff);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #f4f4f5);
  --border:       rgba(0,0,0,0.10);
  --card-shadow:  0 1px 4px rgba(0,0,0,0.08);
  --success:      #27ae60;
  --danger:       #e74c3c;
  --radius:       14px;
  --radius-sm:    8px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--secondary-bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
}

.app {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 0 32px;
}

/* =============================================
   Шапка
   ============================================= */
.header {
  background: var(--bg);
  padding: 14px 16px 12px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}
.header-sub {
  font-size: 12px;
  color: var(--hint);
  margin-top: 1px;
}

/* =============================================
   Метки секций
   ============================================= */
.section-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--hint);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 16px 16px 6px;
}

/* =============================================
   Карточка периода
   ============================================= */
.period-card {
  background: var(--bg);
  border-radius: var(--radius);
  margin: 0 12px 10px;
  box-shadow: var(--card-shadow);
  overflow: hidden;
}

.period-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px 8px;
  border-bottom: 1px solid var(--border);
}

.period-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--link);
  letter-spacing: 0.3px;
}

.btn-remove {
  background: rgba(231, 76, 60, 0.10);
  border: none;
  border-radius: 50%;
  color: var(--danger);
  font-size: 16px;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
  flex-shrink: 0;
}
.btn-remove:active {
  background: rgba(231, 76, 60, 0.22);
}

.period-card-body {
  padding: 12px 14px 14px;
}

/* Строка дат */
.dates-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.field-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--hint);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Кнопка выбора даты (вместо стандартного input[date] для лучшего UX) */
.date-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--secondary-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: border-color 0.15s;
  min-height: 42px;
}
.date-btn.empty {
  color: var(--hint);
  font-weight: 400;
}
.date-btn:focus {
  outline: none;
  border-color: var(--link);
}
.date-btn .cal-icon {
  font-size: 16px;
  flex-shrink: 0;
  margin-left: 4px;
}

/* Скрытый input[date] поверх кнопки */
.date-field-wrap {
  position: relative;
}
.date-input-hidden {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  opacity: 0;
  cursor: pointer;
  font-size: 16px; /* предотвращает zoom на iOS */
  z-index: 2;
}

/* Коэффициент */
.coeff-group {
  margin-bottom: 10px;
}

.coeff-select {
  width: 100%;
  padding: 10px 36px 10px 12px;
  background: var(--secondary-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
  /* стрелка вниз */
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath d='M1 1l6 6 6-6' stroke='%23888' stroke-width='1.8' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  min-height: 42px;
}
.coeff-select:focus {
  border-color: var(--link);
}

/* Инфо о количестве дней */
.days-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  background: rgba(36, 129, 204, 0.10);
  border-radius: 20px;
  font-size: 13px;
  color: var(--link);
  font-weight: 500;
}
.days-badge.error {
  background: rgba(231, 76, 60, 0.10);
  color: var(--danger);
}
.days-info {
  min-height: 28px;
  display: flex;
  align-items: center;
}

/* =============================================
   Кнопки действий
   ============================================= */
.add-btn-wrap {
  padding: 0 12px 4px;
}
.calc-btn-wrap {
  padding: 6px 12px 0;
}

.btn {
  display: block;
  width: 100%;
  padding: 13px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: opacity 0.15s, transform 0.1s;
  line-height: 1.3;
}
.btn:active {
  opacity: 0.82;
  transform: scale(0.985);
}

.btn-add {
  background: var(--bg);
  color: var(--link);
  border: 2px dashed var(--border);
  font-size: 15px;
  box-shadow: none;
}
.btn-add:hover {
  border-color: var(--link);
}

.btn-calc {
  background: var(--btn-bg);
  color: var(--btn-text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  margin-top: 6px;
}

.btn-send {
  background: var(--success);
  color: #fff;
  margin-top: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* =============================================
   Блок результата
   ============================================= */
.results-block {
  background: var(--bg);
  border-radius: var(--radius);
  margin: 16px 12px 0;
  box-shadow: var(--card-shadow);
  padding: 16px;
}
.results-header {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* Строка результата по периоду */
.result-row {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.result-row:last-child {
  border-bottom: none;
}
.result-period-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--link);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 2px;
}
.result-dates {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 1px;
}
.result-type {
  font-size: 12px;
  color: var(--hint);
  margin-bottom: 4px;
}
.result-formula {
  font-size: 14px;
  margin-bottom: 1px;
}
.result-formula b {
  color: var(--link);
}
.result-law-ref {
  font-size: 11px;
  color: var(--hint);
  font-style: italic;
}

/* Итого */
.result-total-box {
  background: var(--secondary-bg);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-top: 14px;
  text-align: center;
}
.total-label {
  font-size: 12px;
  color: var(--hint);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-bottom: 4px;
}
.total-days-num {
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
}
.total-days-unit {
  font-size: 14px;
  color: var(--hint);
  margin-left: 3px;
}
.total-human {
  font-size: 15px;
  color: var(--link);
  font-weight: 600;
  margin-top: 4px;
}

/* =============================================
   Подвал
   ============================================= */
.footer-note {
  text-align: center;
  font-size: 11px;
  color: var(--hint);
  padding: 20px 20px 8px;
  line-height: 1.6;
}