/* 💙 Стили калькулятора разделения НДС — синяя налоговая тема */

:root {
  --snds-blue: #1a56a8;
  --snds-blue-dark: #123f7e;
  --snds-blue-light: #e8f1fd;
  --snds-blue-accent: #2f7bd9;
  --snds-gold: #b8860b;
  --snds-text: #2b2b2b;
  --snds-muted: #6b7280;
  --snds-border: #c9dcf5;
  --snds-warning-bg: #fff8e1;
  --snds-warning-border: #f0d060;
}

/* 📌 Заголовки и вступление */
.calc-block h1 {
  color: var(--snds-blue);
  margin-bottom: 8px;
}

.calc-intro {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.6;
  color: #555;
}

/* 🔀 Переключатель режимов: одна сумма / несколько позиций */
.mode-toggle {
  display: flex;
  gap: 10px;
  margin: 22px 0 6px;
}

.mode-btn {
  flex: 1;
  padding: 12px 10px;
  background: var(--snds-blue-light);
  border: 2px solid var(--snds-border);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  color: var(--snds-blue);
  cursor: pointer;
  text-align: center;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.mode-btn:hover {
  border-color: var(--snds-blue-accent);
}

.mode-btn.active {
  background: var(--snds-blue);
  border-color: var(--snds-blue);
  color: #fff;
}

.mode-btn.active:hover {
  background: var(--snds-blue-dark);
  border-color: var(--snds-blue-dark);
}

/* 🧾 Поля ввода */
.calc-block label {
  display: block;
  margin-top: 1.2rem;
  margin-bottom: 0.4rem;
  font-weight: 600;
  color: var(--snds-blue-dark);
}

.calc-block input,
.calc-block select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-size: 1.05rem;
  border: 2px solid var(--snds-border);
  border-radius: 10px;
  background-color: #fbfdff;
  color: var(--snds-text);
  box-sizing: border-box;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.calc-block input:focus,
.calc-block select:focus {
  outline: none;
  border-color: var(--snds-blue-accent);
  box-shadow: 0 0 0 3px rgba(47, 123, 217, 0.18);
}

.calc-block input {
  font-variant-numeric: tabular-nums;
}

.calc-block .field-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--snds-muted);
}

/* 📦 Режим нескольких позиций */
.multi-title {
  margin: 1.2rem 0 0.4rem;
  font-size: 1rem;
  color: var(--snds-blue-dark);
}

#positionsList {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.position-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.position-row .position-name {
  flex: 1.2;
}

.position-row .position-amount {
  flex: 1;
}

.position-row .position-remove {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 2px solid #f0c0c0;
  border-radius: 10px;
  background: #fdf2f2;
  color: #c0392b;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.position-row .position-remove:hover {
  background: #fadcdc;
  border-color: #e0a0a0;
}

.add-row-btn {
  margin-top: 0.7rem;
  width: 100%;
  padding: 0.65rem;
  background: var(--snds-blue-light);
  color: var(--snds-blue);
  border: 2px dashed var(--snds-blue-accent);
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.add-row-btn:hover {
  background: #dcebfd;
  border-color: var(--snds-blue);
}

/* 💰 Результаты */
.result-output {
  background: #f5f8fc;
}

.result-note,
.result-placeholder {
  margin: 0;
  color: var(--snds-muted);
  font-size: 0.95rem;
}

.result-hero {
  background: linear-gradient(135deg, var(--snds-blue) 0%, var(--snds-blue-accent) 100%);
  border-radius: 12px;
  padding: 1.2rem 1.4rem;
  color: #fff;
  margin-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(26, 86, 168, 0.25);
}

.result-hero .result-label {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  opacity: 0.9;
}

.result-hero .result-value {
  display: block;
  margin-top: 0.3rem;
  font-size: 1.9rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.result-card {
  background: #fff;
  border: 1px solid var(--snds-border);
  border-radius: 10px;
  padding: 0.8rem 1rem;
}

.result-card .result-label {
  display: block;
  font-size: 0.8rem;
  color: var(--snds-muted);
}

.result-card .result-value {
  display: block;
  margin-top: 0.2rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--snds-blue-dark);
  font-variant-numeric: tabular-nums;
}

/* 📊 Таблица позиций */
.result-table-wrap {
  overflow-x: auto;
  margin-top: 1rem;
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
}

.result-table th,
.result-table td {
  padding: 0.5rem 0.6rem;
  text-align: left;
  border-bottom: 1px solid var(--snds-border);
  white-space: nowrap;
}

.result-table th {
  background: var(--snds-blue);
  color: #fff;
  font-weight: 600;
}

.result-table tr:last-child td {
  border-bottom: none;
}

.result-table tbody tr:hover {
  background: var(--snds-blue-light);
}

.result-table .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.result-table tfoot td {
  font-weight: 700;
  border-top: 2px solid var(--snds-blue);
  background: var(--snds-blue-light);
  color: var(--snds-blue-dark);
}

/* 🧮 Пошаговый расчёт */
.result-steps,
.result-coef,
.result-warning {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  font-size: 0.93rem;
  line-height: 1.55;
}

.result-steps {
  background: var(--snds-blue-light);
  border: 1px solid var(--snds-border);
}

.result-steps h3,
.result-coef h3,
.result-warning h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--snds-blue-dark);
}

.result-steps ol {
  margin: 0;
  padding-left: 1.2rem;
}

.result-steps li {
  margin-bottom: 0.3rem;
  font-variant-numeric: tabular-nums;
}

.result-steps li:last-child {
  margin-bottom: 0;
}

.result-steps .calc-expr {
  font-weight: 700;
  color: var(--snds-blue);
}

/* 🪙 Расчётная ставка */
.result-coef {
  background: #fffdf3;
  border: 1px solid #f0e0a0;
}

.result-coef h3 {
  color: #7a5c00;
}

.result-coef p {
  margin: 0;
  color: var(--snds-text);
}

/* ⚠️ Предупреждение об округлении */
.result-warning {
  background: var(--snds-warning-bg);
  border: 1px solid var(--snds-warning-border);
  border-left: 5px solid var(--snds-gold);
}

.result-warning h3 {
  color: #7a5c00;
}

.result-warning p {
  margin: 0;
  color: #5f4a00;
}

/* 📖 Описание */
.calculator-description {
  max-width: 800px;
  margin: 50px auto;
  padding: 30px;
  background-color: var(--snds-blue-light);
  border-left: 4px solid var(--snds-blue);
  border-radius: 6px;
  line-height: 1.6;
  font-size: 16px;
}

.calculator-description h2,
.calculator-description h3 {
  color: var(--snds-blue);
  margin-top: 20px;
}

.calculator-description h2 {
  margin-top: 0;
}

.calculator-description code {
  background: #fff;
  border: 1px solid var(--snds-border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 15px;
}

/* 📱 Мобильная адаптация */
@media (max-width: 640px) {
  .mode-toggle {
    flex-direction: column;
  }

  .result-grid {
    grid-template-columns: 1fr;
  }

  .result-hero .result-value {
    font-size: 1.6rem;
  }

  .position-row {
    flex-wrap: wrap;
  }

  .position-row .position-name {
    flex: 1 1 100%;
  }

  .position-row .position-amount {
    flex: 1 1 auto;
  }

  .result-table {
    font-size: 0.82rem;
  }
}