/* Base */
* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  color: var(--color-text-main);
  background: var(--color-bg-app);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

/* App Shell */
.app-shell {
  min-height: 100vh;
  background: var(--color-bg-app);
}

.app-topbar {
  height: var(--layout-topbar-height);
  background: var(--color-bg-surface);
  border-bottom: 2px solid var(--color-primary-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
}

.app-body {
  display: grid;
  grid-template-columns: var(--layout-sidebar-width) 1fr;
  min-height: calc(100vh - var(--layout-topbar-height));
}

.app-sidebar {
  background: var(--color-bg-sidebar);
  padding: var(--space-5) var(--space-4);
}

.app-main {
  padding: var(--space-6);
}

.page-container {
  max-width: var(--layout-content-max-width);
}

/* Topbar */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand-logo {
  height: 34px;
  width: auto;
}

.brand-name {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-strong);
}

.user-entry {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-main);
  font-size: var(--font-size-sm);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  display: grid;
  place-items: center;
  overflow: hidden;
}

/* Sidebar */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.nav-item,
.nav-subitem {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-radius: var(--radius-lg);
  color: var(--color-text-main);
  transition: 0.2s ease;
  cursor: pointer;
}

.nav-item {
  min-height: 46px;
  padding: 0 14px;
}

.nav-item:hover,
.nav-subitem:hover {
  background: rgba(47, 140, 255, 0.08);
}

.nav-item.is-active {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  font-weight: var(--font-weight-semibold);
}

.nav-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.05);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.nav-item.is-active .nav-icon {
  background: rgba(255, 255, 255, 0.16);
}

.nav-label {
  flex: 1;
}

.nav-submenu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 4px;
}

.nav-subitem {
  min-height: 38px;
  padding: 0 14px 0 46px;
  border-radius: var(--radius-md);
}

/* Page Header */
.page-header {
  margin-bottom: var(--space-6);
}

.page-title {
  margin: 0 0 var(--space-2);
  font-size: 32px;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-strong);
}

.page-subtitle {
  margin: 0;
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
}

.page-toolbar {
  margin-top: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Grid */
.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: var(--space-5);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Card */
.card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.card-header {
  padding: 20px var(--card-padding);
  border-bottom: 1px solid var(--color-border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.card-title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-strong);
}

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

/* KPI Card */
.stat-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 24px 22px;
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.stat-icon.is-blue {
  background: var(--color-info-soft);
  color: var(--color-info);
}

.stat-icon.is-green {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.stat-icon.is-yellow {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.stat-icon.is-purple {
  background: #f3e8ff;
  color: var(--color-chart-6);
}

.stat-content {
  min-width: 0;
}

.stat-label {
  margin-bottom: 6px;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.stat-value {
  font-size: 24px;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-strong);
}

/* Button */
.btn {
  height: var(--button-height);
  padding: 0 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  transition: 0.2s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

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

.btn-secondary {
  background: var(--color-bg-surface);
  color: var(--color-text-main);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-muted);
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-danger:hover {
  opacity: 0.92;
}

/* Form */
.form-row {
  display: grid;
  gap: var(--space-4);
}

.form-row.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-row.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-main);
}

.input,
.select,
.textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  color: var(--color-text-main);
  transition: 0.2s ease;
}

.input,
.select {
  height: var(--input-height);
  padding: 0 14px;
}

.textarea {
  min-height: 120px;
  padding: 12px 14px;
  resize: vertical;
}

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(47, 140, 255, 0.12);
}

/* Tag */
.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 24px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
}

.tag.is-success {
  background: var(--color-success-soft);
  color: #15803d;
}

.tag.is-warning {
  background: var(--color-warning-soft);
  color: #a16207;
}

.tag.is-danger {
  background: var(--color-danger-soft);
  color: #b91c1c;
}

.tag.is-info {
  background: var(--color-info-soft);
  color: #1d4ed8;
}

/* Table */
.table-wrap {
  width: 100%;
  overflow-x: auto;
}

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

.data-table thead th {
  background: var(--color-bg-muted);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-align: left;
  padding: 14px 24px;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.data-table tbody td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--color-border-soft);
  color: var(--color-text-main);
  vertical-align: middle;
}

.data-table tbody tr:hover {
  background: rgba(15, 23, 42, 0.02);
}

/* Section Space */
.section + .section {
  margin-top: var(--space-6);
}

/* Empty / Hint */
.empty-state,
.helper-text {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.empty-state {
  padding: var(--space-8);
  text-align: center;
}

/* Responsive */
@media (max-width: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .app-body {
    grid-template-columns: 1fr;
  }

  .app-sidebar {
    display: none;
  }

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

  .app-main {
    padding: var(--space-4);
  }

  .page-title {
    font-size: 26px;
  }
}