/* ==========================================================================
   WF-Plan — app.css
   Global layout, component, and utility classes using tokens from tokens.css
   BCEM-light naming: .l- layout · .c- component · .u- utility · .is- state
   ========================================================================== */

/* --------------------------------------------------------------------------
   Reset / Base
   -------------------------------------------------------------------------- */

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

html {
  font-size: var(--kr-fs-base);
  font-family: var(--kr-font-sans);
  line-height: var(--kr-lh-normal);
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); }

img, svg { display: block; max-width: 100%; }

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.l-container {
  max-width: var(--kr-content-max);
  margin-inline: auto;
  padding-inline: var(--kr-space-6);
}

.l-main {
  padding-block: var(--kr-space-10);
  min-height: calc(100vh - 56px);
}

.l-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--kr-space-4);
  margin-bottom: var(--kr-space-8);
}

.l-page-title {
  font-size: var(--kr-fs-2xl);
  font-weight: var(--kr-fw-bold);
  letter-spacing: var(--kr-tracking-tight);
  color: var(--text-primary);
  line-height: var(--kr-lh-tight);
}

.l-page-subtitle {
  font-size: var(--kr-fs-sm);
  color: var(--text-secondary);
  margin-top: var(--kr-space-1);
}

.l-stack { display: flex; flex-direction: column; gap: var(--kr-space-4); }
.l-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--kr-space-6); }
.l-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--kr-space-6); }

/* Auth layout */
.l-auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background-color: var(--bg-canvas);
  padding: var(--kr-space-6);
}

/* --------------------------------------------------------------------------
   Topbar
   -------------------------------------------------------------------------- */

.c-topbar {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.c-topbar__inner {
  display: flex;
  align-items: center;
  gap: var(--kr-space-8);
  height: 100%;
}

.c-topbar__brand {
  flex-shrink: 0;
  text-decoration: none;
}

.c-topbar__logo-text {
  font-size: var(--kr-fs-lg);
  font-weight: var(--kr-fw-black);
  letter-spacing: var(--kr-tracking-tight);
  color: var(--text-primary);
}

.c-topbar__nav {
  display: flex;
  align-items: center;
  gap: var(--kr-space-1);
  flex: 1;
}

.c-topbar__nav-link {
  padding: var(--kr-space-2) var(--kr-space-3);
  border-radius: var(--kr-radius-sm);
  font-size: var(--kr-fs-sm);
  font-weight: var(--kr-fw-medium);
  color: var(--text-secondary);
  transition: color var(--kr-dur-fast) var(--kr-ease),
              background-color var(--kr-dur-fast) var(--kr-ease);
}

.c-topbar__nav-link:hover,
.c-topbar__nav-link.is-active {
  color: var(--text-primary);
  background-color: var(--bg-hover);
}

.c-topbar__user {
  display: flex;
  align-items: center;
  gap: var(--kr-space-3);
  margin-left: auto;
}

.c-topbar__username {
  font-size: var(--kr-fs-sm);
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.c-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--kr-space-2);
  padding: 0 var(--kr-space-4);
  height: 36px;
  border-radius: var(--kr-radius-md);
  font-family: var(--kr-font-sans);
  font-size: var(--kr-fs-sm);
  font-weight: var(--kr-fw-semibold);
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--kr-dur-fast) var(--kr-ease),
              color var(--kr-dur-fast) var(--kr-ease),
              border-color var(--kr-dur-fast) var(--kr-ease),
              box-shadow var(--kr-dur-fast) var(--kr-ease);
  white-space: nowrap;
  text-decoration: none;
}

.c-btn:focus-visible {
  outline: 2px solid var(--accent-ring);
  outline-offset: 2px;
}

.c-btn--primary {
  background-color: var(--accent);
  color: var(--accent-on);
  border-color: var(--accent);
}

.c-btn--primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--accent-on);
}

.c-btn--primary:active {
  background-color: var(--accent-active);
  border-color: var(--accent-active);
}

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

.c-btn--ghost:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.c-btn--sm { height: 28px; padding: 0 var(--kr-space-3); font-size: var(--kr-fs-xs); }
.c-btn--lg { height: 44px; padding: 0 var(--kr-space-6); font-size: var(--kr-fs-base); }
.c-btn--full { width: 100%; }

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */

.c-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--kr-space-2);
  margin-bottom: var(--kr-space-4);
}

.c-label {
  font-size: var(--kr-fs-sm);
  font-weight: var(--kr-fw-medium);
  color: var(--text-secondary);
}

.c-input {
  width: 100%;
  height: 40px;
  padding: 0 var(--kr-space-3);
  background-color: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--kr-radius-sm);
  font-family: var(--kr-font-sans);
  font-size: var(--kr-fs-base);
  color: var(--text-primary);
  transition: border-color var(--kr-dur-fast) var(--kr-ease),
              box-shadow var(--kr-dur-fast) var(--kr-ease);
}

.c-input::placeholder { color: var(--text-tertiary); }

.c-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.c-input.has-error { border-color: var(--status-danger); }

/* --------------------------------------------------------------------------
   Auth card
   -------------------------------------------------------------------------- */

.c-auth-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--kr-radius-xl);
  padding: var(--kr-space-10);
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-xl);
}

.c-auth-card__header {
  text-align: center;
  margin-bottom: var(--kr-space-8);
}

.c-auth-card__logo {
  font-size: var(--kr-fs-3xl);
  font-weight: var(--kr-fw-black);
  letter-spacing: var(--kr-tracking-tight);
  color: var(--text-primary);
  margin-bottom: var(--kr-space-2);
}

.c-auth-card__subtitle {
  font-size: var(--kr-fs-sm);
  color: var(--text-tertiary);
}

.c-auth-card__form { display: flex; flex-direction: column; }

.c-auth-card__footer {
  margin-top: var(--kr-space-6);
  text-align: center;
  font-size: var(--kr-fs-xs);
  color: var(--text-disabled);
}

/* --------------------------------------------------------------------------
   Alerts
   -------------------------------------------------------------------------- */

.c-alert {
  padding: var(--kr-space-3) var(--kr-space-4);
  border-radius: var(--kr-radius-md);
  font-size: var(--kr-fs-sm);
  font-weight: var(--kr-fw-medium);
  margin-bottom: var(--kr-space-4);
}

.c-alert--success {
  background-color: rgba(45,142,71,.14);
  color: var(--status-success);
  border: 1px solid rgba(45,142,71,.3);
}

.c-alert--error {
  background-color: rgba(200,55,45,.14);
  color: var(--status-danger);
  border: 1px solid rgba(200,55,45,.3);
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */

.c-table-wrapper {
  border: 1px solid var(--border);
  border-radius: var(--kr-radius-lg);
  overflow: hidden;
}

.c-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--kr-fs-sm);
}

.c-table th {
  padding: var(--kr-space-3) var(--kr-space-4);
  text-align: left;
  font-weight: var(--kr-fw-semibold);
  font-size: var(--kr-fs-xs);
  letter-spacing: var(--kr-tracking-wide);
  text-transform: uppercase;
  color: var(--text-tertiary);
  background-color: var(--bg-surface-2);
  border-bottom: 1px solid var(--border);
}

.c-table td {
  padding: var(--kr-space-3) var(--kr-space-4);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

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

.c-table tbody tr:hover td { background-color: var(--bg-hover); }

/* --------------------------------------------------------------------------
   Badges
   -------------------------------------------------------------------------- */

.c-badge {
  display: inline-flex;
  align-items: center;
  padding: 0 var(--kr-space-2);
  height: 20px;
  border-radius: var(--kr-radius-pill);
  font-size: var(--kr-fs-xs);
  font-weight: var(--kr-fw-semibold);
  letter-spacing: var(--kr-tracking-wide);
  text-transform: uppercase;
}

.c-badge--success {
  background-color: rgba(45,142,71,.18);
  color: var(--status-success);
}

.c-badge--neutral {
  background-color: var(--bg-surface-2);
  color: var(--text-secondary);
}

.c-badge--warning {
  background-color: rgba(224,168,46,.18);
  color: var(--status-warning);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */

.c-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--kr-radius-lg);
  padding: var(--kr-space-6);
}

.c-card__title {
  font-size: var(--kr-fs-base);
  font-weight: var(--kr-fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--kr-space-4);
}

/* --------------------------------------------------------------------------
   Empty state
   -------------------------------------------------------------------------- */

.c-empty-state {
  text-align: center;
  padding: var(--kr-space-20) var(--kr-space-6);
}

.c-empty-state__icon {
  font-size: 48px;
  margin-bottom: var(--kr-space-4);
}

.c-empty-state__title {
  font-size: var(--kr-fs-xl);
  font-weight: var(--kr-fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--kr-space-2);
}

.c-empty-state__text {
  font-size: var(--kr-fs-base);
  color: var(--text-secondary);
  max-width: 400px;
  margin-inline: auto;
  margin-bottom: var(--kr-space-6);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */

.u-text-accent  { color: var(--accent); }
.u-text-right   { text-align: right; }
.u-text-center  { text-align: center; }
.u-font-mono    { font-family: var(--kr-font-mono); font-size: var(--kr-fs-sm); }
.u-inline       { display: inline; }
.u-hidden       { display: none !important; }
.u-sr-only      { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.u-mb-2 { margin-bottom: var(--kr-space-2); }
.u-mb-4 { margin-bottom: var(--kr-space-4); }
.u-mb-6 { margin-bottom: var(--kr-space-6); }
.u-mb-8 { margin-bottom: var(--kr-space-8); }
.u-mt-2 { margin-top: var(--kr-space-2); }
.u-mt-4 { margin-top: var(--kr-space-4); }
.u-mt-6 { margin-top: var(--kr-space-6); }
.u-text-secondary { color: var(--text-secondary); }

/* --------------------------------------------------------------------------
   Select
   -------------------------------------------------------------------------- */

.c-select {
  height: 40px;
  padding: 0 var(--kr-space-8) 0 var(--kr-space-3);
  background-color: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--kr-radius-sm);
  font-family: var(--kr-font-sans);
  font-size: var(--kr-fs-base);
  color: var(--text-primary);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236E6E69' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--kr-space-3) center;
  cursor: pointer;
  transition: border-color var(--kr-dur-fast) var(--kr-ease);
}

.c-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.c-select--sm { height: 32px; font-size: var(--kr-fs-sm); }

/* --------------------------------------------------------------------------
   Form layout helpers
   -------------------------------------------------------------------------- */

.l-form-row {
  display: flex;
  gap: var(--kr-space-4);
  align-items: flex-start;
}

.l-form-row .c-form-group { flex: 1; }

.l-form-actions {
  display: flex;
  gap: var(--kr-space-3);
  justify-content: flex-end;
  margin-top: var(--kr-space-6);
  padding-top: var(--kr-space-6);
  border-top: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   Breadcrumb
   -------------------------------------------------------------------------- */

.l-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--kr-space-2);
  font-size: var(--kr-fs-sm);
  color: var(--text-tertiary);
}

.l-breadcrumb__link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--kr-dur-fast) var(--kr-ease);
}

.l-breadcrumb__link:hover { color: var(--text-primary); }

.l-breadcrumb__sep { opacity: 0.4; }

/* --------------------------------------------------------------------------
   Section header
   -------------------------------------------------------------------------- */

.l-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--kr-space-4);
}

.l-section-title {
  font-size: var(--kr-fs-lg);
  font-weight: var(--kr-fw-semibold);
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Button group
   -------------------------------------------------------------------------- */

.l-btn-group {
  display: flex;
  gap: var(--kr-space-2);
  align-items: center;
}

/* --------------------------------------------------------------------------
   Danger button
   -------------------------------------------------------------------------- */

.c-btn--danger {
  background-color: rgba(200,55,45,.15);
  color: var(--status-danger);
  border-color: rgba(200,55,45,.3);
}

.c-btn--danger:hover {
  background-color: var(--status-danger);
  color: #fff;
  border-color: var(--status-danger);
}

/* --------------------------------------------------------------------------
   Filter bar
   -------------------------------------------------------------------------- */

.c-filter-bar {
  display: flex;
  align-items: center;
  gap: var(--kr-space-3);
  flex-wrap: wrap;
}

.c-input--sm { height: 32px; font-size: var(--kr-fs-sm); }

/* --------------------------------------------------------------------------
   Definition list
   -------------------------------------------------------------------------- */

.c-dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--kr-space-2) var(--kr-space-6);
  font-size: var(--kr-fs-sm);
}

.c-dl dt {
  color: var(--text-tertiary);
  font-weight: var(--kr-fw-medium);
  white-space: nowrap;
}

.c-dl dd { color: var(--text-primary); }

/* --------------------------------------------------------------------------
   Unit card
   -------------------------------------------------------------------------- */

.c-unit-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--kr-radius-lg);
  padding: var(--kr-space-4) var(--kr-space-5);
}

.c-unit-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--kr-space-4);
}

.c-unit-card__name {
  font-weight: var(--kr-fw-semibold);
  color: var(--text-primary);
}

.c-unit-card__actions {
  margin-top: var(--kr-space-3);
  padding-top: var(--kr-space-3);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  gap: var(--kr-space-2);
}

/* --------------------------------------------------------------------------
   Color picker
   -------------------------------------------------------------------------- */

.l-color-picker {
  display: flex;
  align-items: center;
  gap: var(--kr-space-3);
}

.c-color-input {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--kr-radius-sm);
  padding: 2px;
  background: var(--bg-input);
  cursor: pointer;
}

.c-color-label {
  font-family: var(--kr-font-mono);
  font-size: var(--kr-fs-sm);
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   File input
   -------------------------------------------------------------------------- */

.c-input-file {
  font-size: var(--kr-fs-sm);
  color: var(--text-secondary);
}

.c-hint {
  font-size: var(--kr-fs-xs);
  color: var(--text-tertiary);
}

/* --------------------------------------------------------------------------
   Divider
   -------------------------------------------------------------------------- */

.c-divider {
  border: none;
  border-top: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   Trashed rows
   -------------------------------------------------------------------------- */

.c-table .is-trashed td { opacity: 0.7; }

/* --------------------------------------------------------------------------
   Empty state (sm variant)
   -------------------------------------------------------------------------- */

.c-empty-state--sm {
  padding: var(--kr-space-8) 0;
  text-align: left;
}

.c-empty-state--sm .c-empty-state__text {
  margin: 0;
  font-size: var(--kr-fs-sm);
}