/* =========================================================
   Ivitech Utilities — unified styles
   ========================================================= */

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;
  --primary-soft-2: #e0e7ff;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --bg: #f5f6fa;
  --bg-card: #ffffff;
  --success-bg: #d1fae5;
  --success-fg: #065f46;
  --danger-bg: #fee2e2;
  --danger-fg: #991b1b;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.04);

  --sidebar-w: 240px;
}

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========== Layout ========== */

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  background: #fff;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  flex-shrink: 0;
}

.main {
  flex: 1;
  padding: 40px 48px;
  min-width: 0;
}

/* ========== Sidebar ========== */

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px 20px;
  border-bottom: 1px solid var(--border);
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.nav {
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav-item:hover {
  background: #f3f4f6;
  color: var(--text);
}

.nav-item.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

.nav-item.active .nav-icon { color: var(--primary); }

.nav-icon {
  flex-shrink: 0;
  color: var(--text-light);
}

.nav-item:hover .nav-icon { color: var(--text-muted); }

.sidebar-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-light);
}

/* ========== Page header ========== */

.page-header {
  margin-bottom: 24px;
}

.page-header-with-action {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ========== Card ========== */

.card {
  background: var(--bg-card);
  border-radius: 14px;
  padding: 28px;
  box-shadow: var(--shadow-md);
  margin-bottom: 20px;
}

.card-narrow {
  max-width: 680px;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* ========== Views ========== */

.view.hidden { display: none; }

.view[data-view="check-api"] {
  max-width: 720px;
  margin: 0 auto;
}

/* ========== Forms ========== */

.form-grid {
  display: grid;
  gap: 18px;
}

.form-grid-2 { grid-template-columns: 1fr 1fr; }
.form-grid-3 { grid-template-columns: repeat(3, 1fr); }
.form-grid-4 { grid-template-columns: repeat(4, 1fr); }

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group label .required { color: #ef4444; }

.form-group input[type="text"],
.form-group input[type="password"],
.form-group .form-select {
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  font-size: 15px;
  font-family: inherit;
  outline: none;
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus,
.form-group .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.form-group input:disabled {
  background: #f3f4f6;
  color: var(--text-light);
  cursor: not-allowed;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}

.form-group .hint {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 5px;
}

.form-group .periods-custom { margin-top: 8px; }

/* ========== Button ========== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  padding: 11px 28px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.08s;
  font-family: inherit;
  min-width: 160px;
}

.btn:hover { background: var(--primary-hover); }
.btn:active { transform: scale(0.99); }
.btn:disabled { background: #a5b4fc; cursor: not-allowed; }

.btn-secondary {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--primary);
  margin-top: 0;
  padding: 9px 20px;
  min-width: 0;
}
.btn-secondary:hover { background: var(--primary-soft); }
.btn-secondary:disabled { background: #f3f4f6; color: var(--text-light); border-color: var(--border); }

#check-form .btn { margin-left: auto; margin-right: auto; display: flex; }

.btn-row { display: flex; align-items: center; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.btn-row .btn { margin-top: 0; }

/* Spinner */
.spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
.spinner.visible { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== Alerts ========== */

.alert {
  display: none;
  margin-top: 14px;
  padding: 11px 14px;
  border-radius: 8px;
  font-size: 13px;
}

.alert.visible { display: block; }

.alert-error {
  background: var(--danger-bg);
  color: var(--danger-fg);
  border: 1px solid #fecaca;
}

.alert-success {
  background: var(--success-bg);
  color: var(--success-fg);
  border: 1px solid #a7f3d0;
}

/* ========== Check API — results ========== */

.results { display: none; }
.results.visible { display: block; }

.info-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.info-card {
  background: #f8f9fb;
  border-radius: 10px;
  padding: 14px 16px;
}

.info-label {
  font-size: 11px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.info-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  word-break: break-word;
}

.methods-table {
  width: 100%;
  border-collapse: collapse;
}

.methods-table th,
.methods-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid #f1f2f4;
  font-size: 14px;
}

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

.methods-table th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

.text-right { text-align: right !important; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success { background: var(--success-bg); color: var(--success-fg); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger-fg); }
.badge-neutral { background: #e5e7eb;           color: #6b7280; }

/* ========== Calculator — discounts ========== */

.discounts-row {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.checkbox-group input[type="checkbox"] { display: none; }

.checkbox-toggle {
  width: 42px;
  height: 24px;
  background: #d1d5db;
  border-radius: 12px;
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
}

.checkbox-toggle::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  top: 3px;
  left: 3px;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.checkbox-group input:checked + .checkbox-toggle { background: var(--primary); }
.checkbox-group input:checked + .checkbox-toggle::after { transform: translateX(18px); }

.checkbox-group .toggle-label {
  font-size: 14px;
  font-weight: 500;
  color: #374151;
}

.toggle-hint { color: var(--text-light); font-weight: 400; }

.select-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.select-group label {
  font-size: 14px;
  font-weight: 500;
  color: #374151;
  white-space: nowrap;
}

.select-group select {
  padding: 8px 30px 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  font-size: 14px;
  font-family: inherit;
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M2 4l4 4 4-4'/%3E%3C/svg%3E") no-repeat right 10px center;
  appearance: none;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.select-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.effective-rate {
  display: none;
  margin-top: 14px;
  padding: 10px 14px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 9px;
  font-size: 13px;
  color: #166534;
  font-weight: 500;
}

.effective-rate.warning {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}

/* ========== Shield button (admin mode) ========== */

.shield-btn {
  background: none;
  border: 1.5px solid var(--border-strong);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-light);
  transition: all 0.15s;
  flex-shrink: 0;
}

.shield-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.shield-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* ========== Calculator — summary ========== */

.summary { display: none; }
.summary.visible { display: block; }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px 24px;
}

.summary-item { min-width: 0; }

.summary-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  word-break: break-word;
  margin-top: 2px;
}

/* ========== Calculator — schedule table ========== */

.table-wrapper { display: none; }
.table-wrapper.visible { display: block; }

.table-scroll {
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.schedule-table thead { background: #f9fafb; }

.schedule-table thead th {
  padding: 11px 12px;
  text-align: right;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

.schedule-table thead th.col-days,
.schedule-table thead th.col-balance { text-align: center; }

.schedule-table thead th.group-header {
  text-align: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 7px;
  padding-top: 9px;
}

.schedule-table tbody tr { transition: background 0.1s; }
.schedule-table tbody tr:hover { background: #f8f9ff; }

.schedule-table tbody tr:not(:last-child) td {
  border-bottom: 1px solid #f3f4f6;
}

.schedule-table tbody tr:last-child {
  background: #f0f1ff;
  font-weight: 600;
}

.schedule-table tbody td {
  padding: 9px 12px;
  text-align: right;
  white-space: nowrap;
}

.schedule-table tbody td.col-days {
  text-align: center;
  color: var(--text-light);
  font-weight: 600;
}

/* ========== Modal ========== */

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-overlay.visible { display: flex; }

.modal {
  background: #fff;
  border-radius: 14px;
  padding: 26px 28px;
  width: 360px;
  max-width: 90vw;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.modal h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text);
}

.modal input[type="password"] {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.modal input[type="password"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.modal-error {
  color: #dc2626;
  font-size: 13px;
  margin-top: 8px;
  display: none;
}

.modal-buttons {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  justify-content: flex-end;
}

.modal-btn {
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  border: none;
  transition: background 0.15s;
}

.modal-btn.primary { background: var(--primary); color: #fff; }
.modal-btn.primary:hover { background: var(--primary-hover); }
.modal-btn.secondary { background: #f3f4f6; color: #374151; }
.modal-btn.secondary:hover { background: #e5e7eb; }

/* ========== Advanced mode ========== */

.advanced-only { display: none !important; }
body.advanced .advanced-only { display: block !important; }
body.advanced .form-group.advanced-only,
body.advanced .summary-item.advanced-only { display: flex !important; flex-direction: column; }

.advanced-only-block { display: none !important; }
body.advanced .advanced-only-block { display: block !important; }

.admin-config {
  margin-top: 20px;
  padding: 18px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-soft-2);
  border-radius: 10px;
}

.admin-config-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.admin-config-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.rates-section {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--primary-soft-2);
}

.rates-section-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.form-group input[readonly] {
  background: #f3f4f6;
  color: var(--text);
  cursor: not-allowed;
}

.hidden { display: none !important; }

/* ========== Responsive ========== */

@media (max-width: 960px) {
  .form-grid-3 { grid-template-columns: 1fr 1fr; }
  .form-grid-4 { grid-template-columns: 1fr 1fr; }
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .main { padding: 28px 24px; }
}

@media (max-width: 720px) {
  .layout { flex-direction: column; }

  .sidebar {
    position: static;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .brand { padding: 14px 16px; border-bottom: 1px solid var(--border); }

  .nav {
    flex-direction: row;
    padding: 8px 10px;
    overflow-x: auto;
  }

  .nav-item { flex-shrink: 0; }
  .sidebar-footer { display: none; }

  .main { padding: 20px 16px; }

  .form-grid-2,
  .form-grid-3,
  .form-grid-4 { grid-template-columns: 1fr; }

  .admin-config-header { flex-direction: column; align-items: stretch; }
  .info-cards { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: 1fr; }

  .card { padding: 20px; }
  .page-header h1 { font-size: 19px; }
}