/* ============================================================================
   AMS design system — Bootstrap 5 layer + custom --lt-* tokens.
   Inter is loaded via wwwroot/fonts/inter.css (self-hosted).
   ============================================================================ */

:root {
  --lt-primary: #1f4e8c;
  --lt-primary-dark: #163a68;
  --lt-primary-light: #e8f0fa;
  --lt-accent: #0d9488;

  --lt-bg: #f4f6fa;
  --lt-surface: #ffffff;
  --lt-surface-2: #f9fafc;
  --lt-border: #e2e8f0;
  --lt-text: #1e293b;
  --lt-text-muted: #64748b;

  --lt-success: #15803d;
  --lt-success-bg: #dcfce7;
  --lt-warning: #b45309;
  --lt-warning-bg: #fef3c7;
  --lt-danger: #b91c1c;
  --lt-danger-bg: #fee2e2;
  --lt-info: #1d4ed8;
  --lt-info-bg: #dbeafe;
  --lt-neutral: #475569;
  --lt-neutral-bg: #f1f5f9;

  --lt-radius: 8px;
  --lt-radius-sm: 5px;
  --lt-shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);
  --lt-shadow-md: 0 4px 12px rgba(15, 23, 42, .10);

  --lt-sidebar-w: 250px;
  --lt-topbar-h: 60px;
}

* { box-sizing: border-box; }

html { position: relative; min-height: 100%; font-size: 15px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--lt-bg);
  color: var(--lt-text);
  margin: 0;
}

a { color: var(--lt-primary); }
a:hover { color: var(--lt-primary-dark); }

/* ---- App shell ---------------------------------------------------------- */

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

.lt-sidebar {
  width: var(--lt-sidebar-w);
  background: var(--lt-primary-dark);
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  overflow-y: auto;
  z-index: 1030;
}

.lt-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: 1rem 1.25rem;
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  text-decoration: none;
}
.lt-brand:hover { color: #fff; }
.lt-brand .lt-brand-mark {
  width: 34px; height: 34px;
  background: var(--lt-primary);
  border-radius: var(--lt-radius-sm);
  display: grid; place-items: center;
  color: #fff; font-size: 1rem;
}
.lt-brand small { display: block; font-weight: 400; font-size: .68rem; color: #94a3b8; }

.lt-nav { padding: .75rem 0; list-style: none; margin: 0; }
.lt-nav .lt-nav-section {
  padding: .9rem 1.25rem .35rem;
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #64748b;
}
.lt-nav a, .lt-nav .lt-nav-disabled {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .55rem 1.25rem;
  color: #cbd5e1;
  text-decoration: none;
  font-size: .9rem;
  border-left: 3px solid transparent;
}
.lt-nav a:hover { background: rgba(255, 255, 255, .06); color: #fff; }
.lt-nav a.active {
  background: rgba(255, 255, 255, .1);
  color: #fff;
  border-left-color: var(--lt-accent);
  font-weight: 600;
}
.lt-nav a i, .lt-nav .lt-nav-disabled i { width: 18px; text-align: center; }
.lt-nav .lt-nav-disabled { color: #64748b; cursor: not-allowed; }
.lt-nav .lt-nav-disabled .lt-soon {
  margin-left: auto; font-size: .6rem; background: rgba(255,255,255,.08);
  padding: .1rem .35rem; border-radius: 3px; text-transform: uppercase;
}

.lt-main {
  flex: 1;
  margin-left: var(--lt-sidebar-w);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.lt-topbar {
  height: var(--lt-topbar-h);
  background: var(--lt-surface);
  border-bottom: 1px solid var(--lt-border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 1020;
}
.lt-topbar .lt-page-title { font-weight: 600; font-size: 1.05rem; margin: 0; }
.lt-topbar .lt-topbar-right { margin-left: auto; display: flex; align-items: center; gap: 1rem; }

.lt-user-chip { display: flex; align-items: center; gap: .55rem; }
.lt-user-chip .lt-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--lt-primary-light); color: var(--lt-primary);
  display: grid; place-items: center; font-weight: 600; font-size: .85rem;
}
.lt-user-chip .lt-user-meta { line-height: 1.15; }
.lt-user-chip .lt-user-name { font-size: .85rem; font-weight: 600; }
.lt-user-chip .lt-user-role { font-size: .7rem; color: var(--lt-text-muted); }

.lt-content { padding: 1.5rem; flex: 1; }

.lt-mobile-toggle { display: none; background: none; border: 0; font-size: 1.25rem; color: var(--lt-text); margin-right: 1rem; }

/* ---- Cards & components ------------------------------------------------- */

.lt-card {
  background: var(--lt-surface);
  border: 1px solid var(--lt-border);
  border-radius: var(--lt-radius);
  box-shadow: var(--lt-shadow);
}
.lt-card .lt-card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--lt-border);
  display: flex; align-items: center; gap: .75rem;
}
.lt-card .lt-card-header h2, .lt-card .lt-card-header h1 { font-size: 1rem; font-weight: 600; margin: 0; }
.lt-card .lt-card-body { padding: 1.25rem; }

.lt-stat {
  background: var(--lt-surface);
  border: 1px solid var(--lt-border);
  border-radius: var(--lt-radius);
  box-shadow: var(--lt-shadow);
  padding: 1.1rem 1.25rem;
  display: flex; align-items: center; gap: 1rem;
  height: 100%;
}
.lt-stat .lt-stat-icon {
  width: 46px; height: 46px; border-radius: var(--lt-radius-sm);
  display: grid; place-items: center; font-size: 1.15rem;
  background: var(--lt-primary-light); color: var(--lt-primary);
}
.lt-stat .lt-stat-value { font-size: 1.6rem; font-weight: 700; line-height: 1; }
.lt-stat .lt-stat-label { font-size: .8rem; color: var(--lt-text-muted); margin-top: .2rem; }

.page-header { display: flex; align-items: center; margin-bottom: 1.25rem; gap: 1rem; flex-wrap: wrap; }
.page-header h1 { font-size: 1.4rem; font-weight: 700; margin: 0; }
.page-header .page-actions { margin-left: auto; display: flex; gap: .5rem; }

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

.lt-table { width: 100%; margin: 0; }
.lt-table thead th {
  background: var(--lt-surface-2);
  font-size: .72rem; text-transform: uppercase; letter-spacing: .04em;
  color: var(--lt-text-muted); font-weight: 600;
  border-bottom: 1px solid var(--lt-border);
  padding: .7rem 1rem; white-space: nowrap;
}
.lt-table tbody td { padding: .7rem 1rem; border-bottom: 1px solid var(--lt-border); vertical-align: middle; }
.lt-table tbody tr:hover { background: var(--lt-surface-2); }

/* ---- Badges / status pills --------------------------------------------- */

.lt-badge {
  display: inline-flex; align-items: center; gap: .3rem;
  font-size: .72rem; font-weight: 600;
  padding: .2rem .55rem; border-radius: 999px; line-height: 1.4;
}
.lt-badge-success { background: var(--lt-success-bg); color: var(--lt-success); }
.lt-badge-warning { background: var(--lt-warning-bg); color: var(--lt-warning); }
.lt-badge-danger  { background: var(--lt-danger-bg);  color: var(--lt-danger); }
.lt-badge-info    { background: var(--lt-info-bg);    color: var(--lt-info); }
.lt-badge-neutral { background: var(--lt-neutral-bg); color: var(--lt-neutral); }

.lt-role-badge {
  font-size: .68rem; font-weight: 600; padding: .15rem .5rem;
  border-radius: 4px; background: var(--lt-primary-light); color: var(--lt-primary);
}

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

.btn-primary {
  --bs-btn-bg: var(--lt-primary);
  --bs-btn-border-color: var(--lt-primary);
  --bs-btn-hover-bg: var(--lt-primary-dark);
  --bs-btn-hover-border-color: var(--lt-primary-dark);
  --bs-btn-active-bg: var(--lt-primary-dark);
  --bs-btn-disabled-bg: var(--lt-primary);
  --bs-btn-disabled-border-color: var(--lt-primary);
}
.btn-outline-primary {
  --bs-btn-color: var(--lt-primary);
  --bs-btn-border-color: var(--lt-primary);
  --bs-btn-hover-bg: var(--lt-primary);
  --bs-btn-hover-border-color: var(--lt-primary);
}

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

.form-label { font-weight: 500; font-size: .85rem; }
.form-control:focus, .form-select:focus {
  border-color: var(--lt-primary);
  box-shadow: 0 0 0 .2rem rgba(31, 78, 140, .15);
}

/* ---- Notification dropdown --------------------------------------------- */

.lt-notif-btn { position: relative; background: none; border: 0; font-size: 1.15rem; color: var(--lt-text-muted); }
.lt-notif-btn .lt-notif-count {
  position: absolute; top: -4px; right: -6px;
  background: var(--lt-danger); color: #fff; font-size: .6rem; font-weight: 700;
  border-radius: 999px; padding: .05rem .3rem; min-width: 16px; text-align: center;
}
.lt-notif-menu { width: 320px; max-height: 420px; overflow-y: auto; padding: 0; }
.lt-notif-item { padding: .7rem 1rem; border-bottom: 1px solid var(--lt-border); white-space: normal; }
.lt-notif-item.unread { background: var(--lt-primary-light); }
a.lt-notif-item:hover { background: var(--lt-bg); }
.lt-notif-item .lt-notif-title { font-weight: 600; font-size: .82rem; }
.lt-notif-item .lt-notif-msg { font-size: .78rem; color: var(--lt-text-muted); }
.lt-notif-item .lt-notif-time { font-size: .68rem; color: var(--lt-text-muted); }

/* ---- Auth (login) page -------------------------------------------------- */

.lt-auth-wrap {
  min-height: 100vh; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--lt-primary-dark), var(--lt-primary));
  padding: 1.5rem;
}
.lt-auth-card {
  width: 100%; max-width: 410px;
  background: var(--lt-surface); border-radius: var(--lt-radius);
  box-shadow: var(--lt-shadow-md); padding: 2rem;
}
.lt-auth-card .lt-auth-brand { text-align: center; margin-bottom: 1.5rem; }
.lt-auth-card .lt-auth-brand .lt-brand-mark {
  width: 52px; height: 52px; margin: 0 auto .75rem;
  background: var(--lt-primary); color: #fff; border-radius: var(--lt-radius);
  display: grid; place-items: center; font-size: 1.4rem;
}
.lt-auth-card .lt-auth-brand h1 { font-size: 1.15rem; font-weight: 700; margin: 0; }
.lt-auth-card .lt-auth-brand p { font-size: .8rem; color: var(--lt-text-muted); margin: .25rem 0 0; }

/* ---- Misc --------------------------------------------------------------- */

.lt-empty { text-align: center; padding: 2.5rem 1rem; color: var(--lt-text-muted); }
.lt-empty i { font-size: 2rem; margin-bottom: .75rem; opacity: .5; }

.lt-kv { display: grid; grid-template-columns: 180px 1fr; gap: .5rem 1rem; font-size: .9rem; }
.lt-kv dt { color: var(--lt-text-muted); font-weight: 500; }
.lt-kv dd { margin: 0; }

.lt-changes { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .8rem; }
.lt-changes .old { color: var(--lt-danger); }
.lt-changes .new { color: var(--lt-success); }

/* ---- Calendar ----------------------------------------------------------- */

.lt-cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}
.lt-cal-dow {
  text-align: center; font-size: .7rem; font-weight: 600; color: var(--lt-text-muted);
  text-transform: uppercase; padding: .25rem 0;
}
.lt-cal-cell {
  min-height: 92px; border: 1px solid var(--lt-border); border-radius: var(--lt-radius-sm);
  padding: .3rem; background: var(--lt-surface); overflow: hidden;
}
.lt-cal-empty { background: var(--lt-surface-2); border-style: dashed; }
.lt-cal-daynum { font-size: .72rem; color: var(--lt-text-muted); font-weight: 600; margin-bottom: .2rem; }
.lt-cal-bar {
  display: block; color: #fff; font-size: .65rem; font-weight: 600;
  padding: .1rem .3rem; border-radius: 3px; margin-bottom: 2px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-decoration: none;
}
.lt-cal-bar:hover { color: #fff; opacity: .9; }
.lt-cal-milestone { font-size: .62rem; color: var(--lt-warning); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lt-cal-legend { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: middle; margin-right: .25rem; }

/* ---- Kanban ------------------------------------------------------------- */

.lt-kanban { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .75rem; }
.lt-kanban-col { background: var(--lt-surface-2); border: 1px solid var(--lt-border); border-radius: var(--lt-radius); padding: .5rem; min-height: 120px; }
.lt-kanban-head {
  font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em;
  color: var(--lt-text-muted); padding: .25rem .35rem .5rem;
  display: flex; align-items: center; justify-content: space-between; gap: .35rem;
}
.lt-kanban-card {
  display: block; background: var(--lt-surface); border: 1px solid var(--lt-border);
  border-radius: var(--lt-radius-sm); padding: .5rem .6rem; margin-bottom: .5rem;
  text-decoration: none; color: var(--lt-text); box-shadow: var(--lt-shadow);
}
.lt-kanban-card:hover { color: var(--lt-text); border-color: var(--lt-primary); }

@media (max-width: 992px) {
  .lt-kanban { grid-template-columns: 1fr; }
}

/* ---- Working papers ----------------------------------------------------- */

.wp-variance {
  border-color: var(--lt-danger) !important;
  background: var(--lt-danger-bg) !important;
  color: var(--lt-danger) !important;
  font-weight: 600;
}
.wp-variance-badge {
  position: absolute; top: 50%; right: .5rem; transform: translateY(-50%);
  pointer-events: none;
}

/* ---- Responsive --------------------------------------------------------- */

@media (max-width: 992px) {
  .lt-sidebar { transform: translateX(-100%); transition: transform .2s ease; }
  .lt-sidebar.open { transform: translateX(0); }
  .lt-main { margin-left: 0; }
  .lt-mobile-toggle { display: block; }
}

/* ---- Real-time: live pill + notification toasts ------------------------- */

.lt-live-pill {
  display: inline-flex; align-items: center; gap: .35rem;
  vertical-align: middle; margin-left: .5rem;
  font-size: .62rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em;
  color: var(--lt-success); background: var(--lt-success-bg);
  padding: .12rem .5rem; border-radius: 999px;
}
.lt-live-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--lt-success);
  animation: lt-pulse 1.8s ease-in-out infinite;
}
@keyframes lt-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(21, 128, 61, .45); }
  50%      { opacity: .55; box-shadow: 0 0 0 4px rgba(21, 128, 61, 0); }
}

.lt-toast-wrap {
  position: fixed; top: 1rem; right: 1rem; z-index: 1080;
  display: flex; flex-direction: column; gap: .5rem;
  max-width: min(360px, calc(100vw - 2rem)); pointer-events: none;
}
.lt-toast {
  display: flex; align-items: flex-start; gap: .6rem;
  background: var(--lt-surface); border: 1px solid var(--lt-border);
  border-left: 3px solid var(--lt-primary);
  border-radius: var(--lt-radius); box-shadow: var(--lt-shadow-md);
  padding: .7rem .85rem; pointer-events: auto;
  opacity: 0; transform: translateX(12px); transition: opacity .25s ease, transform .25s ease;
}
.lt-toast.show { opacity: 1; transform: translateX(0); }
.lt-toast-icon { color: var(--lt-primary); font-size: .95rem; margin-top: .1rem; }
.lt-toast-title { font-weight: 600; font-size: .82rem; color: var(--lt-text); }
.lt-toast-msg { font-size: .78rem; color: var(--lt-text-muted); }