:root {
  --tg-bg: #ffffff;
  --tg-text: #1c1c1e;
  --tg-hint: #8e8e93;
  --tg-link: #2481cc;
  --tg-button: #2481cc;
  --tg-button-text: #ffffff;
  --tg-secondary-bg: #f0f0f3;
  --tg-section-bg: #ffffff;
  --tg-section-separator: #e5e5ea;
  --tg-destructive: #ff3b30;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--tg-secondary-bg);
  color: var(--tg-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

.state {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 24px;
  text-align: center;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--tg-section-separator);
  border-top-color: var(--tg-button);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.checkmark {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #34c759;
  color: #fff;
  font-size: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.view {
  max-width: 560px;
  margin: 0 auto;
  padding: 16px 16px 100px;
}

.view h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 8px 4px 16px;
}

section {
  background: var(--tg-section-bg);
  border-radius: 14px;
  padding: 4px 16px 16px;
  margin-bottom: 16px;
}

section h2 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--tg-hint);
  letter-spacing: 0.02em;
  margin: 16px 0 8px;
}

label {
  display: block;
  font-size: 13px;
  color: var(--tg-hint);
  margin: 12px 0 4px;
}

input, textarea {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--tg-section-separator);
  background: transparent;
  color: var(--tg-text);
  font-size: 17px;
  padding: 8px 0;
  outline: none;
  font-family: inherit;
  resize: vertical;
}
input:focus, textarea:focus { border-bottom-color: var(--tg-button); }
input::placeholder, textarea::placeholder { color: var(--tg-hint); }
input:invalid:not(:placeholder-shown) { border-bottom-color: var(--tg-destructive); }
input:disabled, textarea:disabled { color: var(--tg-hint); border-bottom-style: dotted; }

.money-field {
  display: flex;
  align-items: baseline;
  gap: 6px;
  border-bottom: 1px solid var(--tg-section-separator);
}
.money-field input {
  border-bottom: none;
  flex: 1;
}
.money-field:focus-within { border-bottom-color: var(--tg-button); }
.money-field span {
  font-size: 13px;
  color: var(--tg-hint);
}

.field-error {
  color: var(--tg-destructive);
  font-size: 13px;
  margin: 2px 0 4px;
}

.plan-summary {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--tg-secondary-bg);
  font-size: 14px;
}
.plan-summary p {
  margin: 4px 0;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.plan-summary input {
  background: transparent;
  border: none;
  border-bottom: 1px dashed var(--tg-hint);
  outline: none;
  text-align: right;
  font: inherit;
  color: inherit;
  width: 110px;
  padding: 0 0 2px;
}
.plan-summary input:focus { border-bottom-color: var(--tg-button); }
.hint {
  font-size: 12px;
  color: var(--tg-hint);
}
.plan-summary p.hint {
  justify-content: flex-start;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 14px;
  color: var(--tg-text);
}
.checkbox-row input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.no-results {
  padding: 10px 4px;
  color: var(--tg-hint);
  font-size: 14px;
}

input[type="search"] {
  border: 1px solid var(--tg-section-separator);
  border-radius: 10px;
  padding: 10px 12px;
  margin-top: 12px;
}

#customer-results {
  margin-top: 4px;
}

.customer-row {
  padding: 10px 4px;
  border-bottom: 1px solid var(--tg-section-separator);
  cursor: pointer;
}
.customer-row:last-child { border-bottom: none; }
.customer-row .name { font-weight: 500; display: flex; align-items: center; gap: 6px; }
.customer-row .meta { font-size: 13px; color: var(--tg-hint); }

.status-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 6px;
  letter-spacing: 0.02em;
}
.status-badge.active { background: rgba(52, 199, 89, 0.15); color: #248a3d; }
.status-badge.late { background: rgba(255, 149, 0, 0.15); color: #c93400; }
.status-badge.closed { background: rgba(142, 142, 147, 0.15); color: var(--tg-hint); }

.installment-picker {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.installment-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--tg-section-separator);
  cursor: pointer;
}

.installment-row .installment-left { display: flex; align-items: center; gap: 10px; }
.installment-row .installment-check { flex-shrink: 0; width: 18px; height: 18px; }
.installment-row.selected .installment-check { accent-color: var(--tg-button-text); }
.installment-row .installment-month { font-weight: 500; }
.installment-row .installment-due { font-size: 13px; color: var(--tg-hint); }
.installment-row .installment-amount { font-weight: 600; white-space: nowrap; }

.installment-row.overdue .installment-due { color: var(--tg-destructive); }

.installment-row.selected {
  background: var(--tg-button);
  border-color: var(--tg-button);
  color: var(--tg-button-text);
}
.installment-row.selected .installment-due,
.installment-row.selected.overdue .installment-due { color: inherit; opacity: 0.85; }

.installment-row.bulk-checked { border-color: var(--tg-button); border-width: 2px; padding: 9px 11px; }

.secondary-btn {
  width: 100%;
  margin-top: 12px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--tg-section-separator);
  background: transparent;
  color: var(--tg-text);
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
}

.delete-btn {
  width: 100%;
  margin-top: 8px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--tg-destructive);
  background: transparent;
  color: var(--tg-destructive);
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
}

.selected-customer {
  margin: 12px 0 4px;
  padding: 10px 12px;
  background: var(--tg-secondary-bg);
  border-radius: 10px;
  font-weight: 500;
}

.method-picker {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.method-btn {
  flex: 1 1 auto;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--tg-section-separator);
  background: transparent;
  color: var(--tg-text);
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
}
.method-btn.selected {
  background: var(--tg-button);
  border-color: var(--tg-button);
  color: var(--tg-button-text);
}

.form-error {
  color: var(--tg-destructive);
  font-size: 14px;
  margin: 4px 8px;
  text-align: center;
}