/*
 * Reusable components: buttons, forms, cards, badges, alerts, sidebar nav,
 * tables, timeline. Built up as pages need them; this file covers what
 * Phase 1's shell and error pages use, plus the pieces defined in
 * design.md that later phases will rely on directly.
 */

/* --------------------------------------------------------------------- */
/* Buttons (design.md 6.1)                                               */
/* --------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-label);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  padding: 10px var(--space-4);
  cursor: pointer;
  text-decoration: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

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

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

.btn-danger {
  background: var(--color-danger);
  color: var(--color-on-accent);
}

.btn-success {
  background: var(--color-success);
  color: var(--color-on-accent);
}

.btn-sm {
  font-size: var(--text-caption);
  padding: 6px var(--space-3);
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-accent);
  font-weight: 600;
  padding: 0;
}

.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-full {
  width: 100%;
}

/* Monospace reference IDs (error pages) — never inline styles (CSP). */
.mono {
  font-family: 'Courier New', Courier, monospace;
}

/* A form that must sit beside another inline control (e.g. a one-button
   action form next to another in a table cell) — never style="" (CSP). */
.inline-form {
  display: inline;
}

/* --------------------------------------------------------------------- */
/* Forms (design.md 6.3)                                                 */
/* --------------------------------------------------------------------- */

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-size: var(--text-label);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.req {
  color: var(--color-danger);
}

.form-control {
  display: block;
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 9px 12px;
  font-size: var(--text-body);
  font-family: var(--font-body);
  color: var(--color-text);
}

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

.form-hint {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.field-error {
  font-size: var(--text-small);
  color: var(--color-danger-text);
  margin-top: var(--space-2);
}

.form-control.has-error {
  border-color: var(--color-danger);
}

textarea.form-control {
  min-height: 6rem;
}

/* File input (design.md 6.3): native picker, styled to match .btn-secondary. */
.form-file {
  display: block;
  width: 100%;
  font-size: var(--text-body);
  color: var(--color-text);
}

.form-file::file-selector-button {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-label);
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 9px var(--space-4);
  margin-inline-end: var(--space-3);
  cursor: pointer;
}

/* --------------------------------------------------------------------- */
/* Cards (design.md 6.5)                                                 */
/* --------------------------------------------------------------------- */

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-5);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.stat-card {
  display: block;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-5);
  text-decoration: none;
  color: inherit;
}

.stat-card.has-danger {
  border-inline-start: 3px solid var(--color-danger);
}

.stat-card-label {
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.stat-card-value {
  font-size: 28px;
  font-weight: 700;
}

.stat-card-detail {
  font-size: var(--text-caption);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.empty-state {
  max-width: 400px;
  margin-inline: auto;
  text-align: center;
  padding: var(--space-8) var(--space-5);
}

/* --------------------------------------------------------------------- */
/* Badges (design.md 6.6)                                                */
/* --------------------------------------------------------------------- */

.badge {
  display: inline-block;
  border-radius: var(--radius-pill);
  font-size: var(--text-small);
  font-weight: 600;
  padding: 2px 10px;
}

.badge-green { background: var(--color-success-bg); color: var(--color-success-text); }
.badge-amber { background: var(--color-warning-bg); color: var(--color-warning-text); }
.badge-red   { background: var(--color-danger-bg);  color: var(--color-danger-text); }
.badge-blue  { background: var(--color-info-bg);    color: var(--color-info-text); }
.badge-grey  { background: var(--color-neutral-bg); color: var(--color-neutral-text); }

/* --------------------------------------------------------------------- */
/* Alerts / flash messages (design.md 6.7)                               */
/* --------------------------------------------------------------------- */

.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  border-inline-start: 3px solid transparent;
}

.alert-label {
  font-weight: 700;
  margin-inline-end: var(--space-1);
}

.alert-success { background: var(--color-success-bg); color: var(--color-success-text); border-inline-start-color: var(--color-success); }
.alert-error   { background: var(--color-danger-bg);  color: var(--color-danger-text);  border-inline-start-color: var(--color-danger); }
.alert-warning { background: var(--color-warning-bg); color: var(--color-warning-text); border-inline-start-color: var(--color-warning); }
.alert-info    { background: var(--color-info-bg);    color: var(--color-info-text);    border-inline-start-color: var(--color-info); }

/* --------------------------------------------------------------------- */
/* Sidebar navigation (design.md 6.12)                                   */
/* --------------------------------------------------------------------- */

.nav-link {
  display: flex;
  align-items: center;
  min-height: var(--tap-target);
  padding-inline: var(--space-4);
  color: var(--color-sidebar-text);
  border-inline-start: 3px solid transparent;
  font-size: var(--text-body);
}

.nav-link:hover {
  text-decoration: none;
}

.nav-link[aria-current="page"] {
  background: var(--color-sidebar-active-bg);
  color: var(--color-on-accent);
  border-inline-start-color: var(--color-accent);
}

/* --------------------------------------------------------------------- */
/* Tables (design.md 6.8)                                                */
/* --------------------------------------------------------------------- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-label);
  background: var(--color-surface);
}

.data-table caption {
  text-align: start;
}

.data-table th {
  background: var(--color-table-head);
  color: var(--color-text-muted);
  font-size: var(--text-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: start;
  padding: var(--space-3);
}

.data-table td {
  padding: var(--space-3);
  border-block-end: 1px solid var(--color-border);
}

.data-table tbody tr:nth-child(odd) {
  background: var(--color-table-stripe);
}

.data-table tr.row-alert-danger {
  border-inline-start: 3px solid var(--color-danger);
}

.data-table tr.row-alert-warning {
  border-inline-start: 3px solid var(--color-warning);
}

.table-scroll {
  overflow-x: auto;
  max-width: 100%;
}

/* --------------------------------------------------------------------- */
/* Pagination (design.md 6.13)                                           */
/* --------------------------------------------------------------------- */

.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.pagination a,
.pagination span {
  padding: 6px var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-label);
}

.pagination a {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.pagination [aria-current="page"] {
  background: var(--color-accent);
  color: var(--color-on-accent);
}

/* --------------------------------------------------------------------- */
/* Subject detail page layout (design.md 5.5)                            */
/* --------------------------------------------------------------------- */

.subject-layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.subject-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.subject-aside {
  flex: 0 0 auto;
}

.detail-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2) var(--space-3);
  font-size: var(--text-body);
}

.detail-list dt {
  color: var(--color-text-muted);
  font-weight: 600;
}

.detail-list dd {
  margin: 0;
}

.subject-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* --------------------------------------------------------------------- */
/* Required files and handovers panel (design.md 6.10)                   */
/* --------------------------------------------------------------------- */

.required-panel {
  background: var(--color-info-bg);
  border-inline-start: 3px solid var(--color-info);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.required-panel-eyebrow {
  font-size: var(--text-eyebrow);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--cu-navy);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.required-panel h3 {
  font-size: var(--text-h3);
  margin: var(--space-4) 0 var(--space-2);
}

.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-inline-end: var(--space-2);
}

.status-dot.success { background: var(--color-success); }
.status-dot.danger { background: var(--color-danger); }
.status-dot.warning { background: var(--color-warning); }

/* --------------------------------------------------------------------- */
/* Status history timeline (design.md 6.9)                               */
/* --------------------------------------------------------------------- */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-inline-start: 2px solid var(--color-border);
  margin-inline-start: 16px;
}

.timeline-item {
  position: relative;
  padding-inline-start: var(--space-5);
  padding-block-end: var(--space-4);
}

.timeline-dot {
  position: absolute;
  inset-inline-start: -21px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cu-burgundy);
}

.timeline-dot.future {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
}

.timeline-dot.current {
  box-shadow: 0 0 0 3px var(--color-focus-ring-soft);
}

.timeline-dot.cancelled {
  background: var(--color-danger);
}

.timeline-title {
  font-weight: 600;
  font-size: var(--text-label);
}

.timeline-meta {
  font-size: var(--text-caption);
  color: var(--color-text-muted);
}

.timeline-sub {
  margin-inline-start: var(--space-4);
  font-size: var(--text-caption);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------- */
/* Progress bar (design.md 6.15)                                         */
/* --------------------------------------------------------------------- */

.progress-track {
  background: var(--color-border);
  border-radius: var(--radius-pill);
  height: 8px;
  overflow: hidden;
}

.progress-fill {
  background: var(--color-accent);
  height: 100%;
}

.progress-fill.complete {
  background: var(--color-success);
}