/* ============================================================
   RESET & BASE STYLES
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

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

html {
  font-size: 14px;
}

body {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--surface-app);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast);
}

button {
  font-family: inherit;
  cursor: pointer;
}

input, select, textarea {
  font-family: inherit;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 7px 14px;
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
  line-height: 1.4;
  text-decoration: none;
}

.btn svg {
  width: 14px;
  height: 14px;
}

.btn-primary {
  background: var(--brand-600);
  color: #fff;
  border-color: var(--brand-600);
}

.btn-primary:hover {
  background: var(--brand-700);
  border-color: var(--brand-700);
}

.btn-secondary {
  background: var(--surface-card);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-secondary:hover {
  background: var(--gray-50);
  border-color: var(--border-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--gray-50);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger-text);
  border-color: var(--danger-border);
}

.btn-danger:hover {
  background: #ffe4e6;
}

.btn-success {
  background: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.btn-success:hover {
  background: #e0fce8;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-xs {
  padding: 3px 8px;
  font-size: 11px;
}

.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ============================================================
   FORM INPUTS
   ============================================================ */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-block-end: var(--sp-4);
}

.input-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  display: block;
}

.input-label.required::after {
  content: ' *';
  color: var(--danger-text);
}

.input-label-hint {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 400;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="search"],
textarea,
select {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  font-size: 13px;
  color: var(--text-primary);
  background: var(--surface-card);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="search"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px var(--brand-50);
}

input[type="text"]:disabled,
input[type="email"]:disabled,
input[type="password"]:disabled,
textarea:disabled,
select:disabled {
  background: var(--gray-50);
  color: var(--text-disabled);
  cursor: not-allowed;
}

input[type="text"].error,
input[type="email"].error,
input[type="password"].error,
textarea.error,
select.error {
  border-color: var(--danger-border);
}

textarea {
  resize: vertical;
  min-height: 100px;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%23737373' d='M3.5 5L7 9.5 10.5 5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 32px;
  cursor: pointer;
}

.input-error {
  font-size: 12px;
  color: var(--danger-text);
  margin-block-start: 4px;
}

.input-hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-block-start: 4px;
}

/* ============================================================
   BADGES & STATUS
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: var(--r-full);
  font-size: 11px;
  font-weight: 500;
  border: 1px solid transparent;
  white-space: nowrap;
}

.badge::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  flex-shrink: 0;
}

.badge-success {
  background: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.badge-success::before {
  background: var(--success-dot);
}

.badge-warning {
  background: var(--warning-bg);
  color: var(--warning-text);
  border-color: var(--warning-border);
}

.badge-warning::before {
  background: var(--warning-dot);
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger-text);
  border-color: var(--danger-border);
}

.badge-danger::before {
  background: var(--danger-dot);
}

.badge-info {
  background: var(--info-bg);
  color: var(--info-text);
  border-color: var(--info-border);
}

.badge-info::before {
  background: var(--info-dot);
}

.badge-neutral {
  background: var(--neutral-bg);
  color: var(--neutral-text);
  border-color: var(--neutral-border);
}

.badge-neutral::before {
  background: var(--neutral-dot);
}

.badge-purple {
  background: var(--purple-bg);
  color: var(--purple-text);
  border-color: var(--purple-border);
}

.badge-purple::before {
  background: var(--purple-dot);
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  transition: box-shadow var(--t-base), border-color var(--t-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-default);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  border-block-end: 1px solid var(--border-subtle);
  gap: var(--sp-4);
}

.card-header-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.card-header-subtitle {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-block-start: 1px;
}

.card-body {
  padding: var(--sp-5);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  border-block-start: 1px solid var(--border-subtle);
  background: var(--gray-25);
  gap: var(--sp-4);
}

/* ============================================================
   KPI CARDS
   ============================================================ */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-4);
  margin-block-end: var(--sp-6);
}

.kpi-card {
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  padding: var(--sp-5);
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--t-base), border-color var(--t-base);
  cursor: default;
}

.kpi-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-default);
}

.kpi-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-block-end: var(--sp-3);
}

.kpi-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.kpi-icon svg {
  width: 18px;
  height: 18px;
}

.kpi-icon.blue {
  background: var(--info-bg);
  color: var(--info-text);
}

.kpi-icon.green {
  background: var(--success-bg);
  color: var(--success-text);
}

.kpi-icon.amber {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.kpi-icon.red {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.kpi-icon.purple {
  background: var(--purple-bg);
  color: var(--purple-text);
}

.kpi-delta {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: var(--r-full);
}

.kpi-delta.up {
  background: var(--success-bg);
  color: var(--success-text);
}

.kpi-delta.down {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.kpi-delta.flat {
  background: var(--neutral-bg);
  color: var(--neutral-text);
}

.kpi-value {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.1;
}

.kpi-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-block-start: 3px;
}

/* ============================================================
   TABLES
   ============================================================ */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  padding: 10px var(--sp-4);
  text-align: start;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  background: var(--gray-25);
  border-block-end: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.data-table td {
  padding: 12px var(--sp-4);
  border-block-end: 1px solid var(--border-subtle);
  font-size: 13px;
  color: var(--text-primary);
  vertical-align: middle;
}

.data-table tbody tr:hover {
  background: var(--gray-25);
}

.data-table tr:last-child td {
  border-block-end: none;
}

/* ============================================================
   TABS
   ============================================================ */
.tab-container {
  background: var(--surface-card);
  border-radius: var(--r-xl);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}

.tab-nav {
  display: flex;
  border-block-end: 1px solid var(--border-subtle);
  background: var(--gray-25);
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-nav-item {
  padding: var(--sp-3) var(--sp-4);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--t-fast);
  position: relative;
  border-block-end: 3px solid transparent;
}

.tab-nav-item:hover {
  color: var(--text-primary);
  background: var(--gray-50);
}

.tab-nav-item.active {
  color: var(--brand-600);
  border-block-end-color: var(--brand-600);
  background: var(--surface-card);
}

/* Tab content wrapper - always visible */
.tab-content {
  padding: var(--sp-5);
  display: block !important;
}

/* Individual tab panes - controlled by active class */
.tab-content > .tab-pane {
  display: none !important;
  animation: fadeIn var(--t-fast);
}

.tab-content > .tab-pane.active,
.tab-content > .tab-pane.show {
  display: block !important;
  opacity: 1 !important;
}

/* Nested tabs within tab-panes */
.tab-pane .tab-content > .tab-pane {
  display: none !important;
  opacity: 0;
}

.tab-pane .tab-content > .tab-pane.active,
.tab-pane .tab-content > .tab-pane.show {
  display: block !important;
  opacity: 1 !important;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
  padding: 12px var(--sp-4);
  border-block-end: 1px solid var(--border-subtle);
  font-size: 13px;
  color: var(--text-primary);
  vertical-align: middle;
}

.data-table tbody tr:hover {
  background: var(--gray-25);
}

.data-table tr:last-child td {
  border-block-end: none;
}

/* ============================================================
   ALERTS
   ============================================================ */
.alert {
  padding: var(--sp-4);
  border-radius: var(--r-md);
  border: 1px solid transparent;
  margin-block-end: var(--sp-4);
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
}

.alert-success {
  background: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.alert-warning {
  background: var(--warning-bg);
  color: var(--warning-text);
  border-color: var(--warning-border);
}

.alert-danger {
  background: var(--danger-bg);
  color: var(--danger-text);
  border-color: var(--danger-border);
}

.alert-info {
  background: var(--info-bg);
  color: var(--info-text);
  border-color: var(--info-border);
}

.alert-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  margin-block-end: 2px;
}

.alert-close {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  opacity: 0.7;
  transition: opacity var(--t-fast);
  padding: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.alert-close:hover {
  opacity: 1;
}