/* ===== Duty Swap App — Core Styles ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --success: #16a34a;
  --success-light: #dcfce7;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.12);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  min-height: 100vh;
}
#app { min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--primary); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea, button { font-size: 14px; }

/* ---- Hidden helper ---- */
.hidden { display: none !important; }

/* ---- Loading spinner ---- */
.spinner {
  width: 42px; height: 42px; border-radius: 50%;
  border: 4px solid var(--primary-light); border-top-color: var(--primary);
  animation: spin 0.8s linear infinite; margin: 40px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }
#global-loader {
  position: fixed; inset: 0; background: rgba(255,255,255,.85);
  display: flex; align-items: center; justify-content: center; z-index: 9999;
}

/* ================= AUTH SCREEN ================= */
.auth-wrap {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 24px; background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 45%, #3b82f6 100%);
}
.auth-card {
  background: #fff; border-radius: 16px; box-shadow: var(--shadow-lg);
  width: 100%; max-width: 420px; padding: 36px 32px;
}
.auth-logo { text-align: center; margin-bottom: 8px; font-size: 34px; color: var(--primary); }
.auth-card h1 { text-align: center; font-size: 22px; margin: 0 0 4px; }
.auth-card p.sub { text-align: center; color: var(--gray-500); margin: 0 0 24px; font-size: 13.5px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--gray-700); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 12px; border: 1.5px solid var(--gray-200); border-radius: 8px;
  outline: none; transition: border-color .15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: none; border-radius: 8px; padding: 10px 18px; font-weight: 600;
  transition: transform .1s, box-shadow .15s; white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-block { width: 100%; }
.btn-outline { background: #fff; border: 1.5px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 6px 12px; font-size: 12.5px; border-radius: 6px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.auth-switch { text-align: center; margin-top: 18px; font-size: 13.5px; color: var(--gray-500); }
.auth-switch a { font-weight: 600; cursor: pointer; }
.error-msg {
  background: var(--danger-light); color: #991b1b; padding: 10px 12px; border-radius: 8px;
  font-size: 13px; margin-bottom: 14px; display: none;
}
.error-msg.show { display: block; }
.success-msg {
  background: var(--success-light); color: #166534; padding: 10px 12px; border-radius: 8px;
  font-size: 13px; margin-bottom: 14px; display: none;
}
.success-msg.show { display: block; }

/* ================= APP LAYOUT ================= */
.topbar {
  background: #fff; border-bottom: 1px solid var(--gray-200); padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between; height: 60px;
  position: sticky; top: 0; z-index: 100;
}
.topbar-left { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--primary); }
.topbar-left i { font-size: 20px; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.icon-btn {
  position: relative; background: none; border: none; font-size: 18px; color: var(--gray-700);
  padding: 8px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: var(--gray-100); }
.badge-dot {
  position: absolute; top: 2px; right: 2px; background: var(--danger); color: #fff;
  font-size: 10px; font-weight: 700; border-radius: 999px; padding: 1px 5px; line-height: 1.3;
}
.user-chip { display: flex; align-items: center; gap: 8px; cursor: pointer; padding: 6px 10px; border-radius: 999px; }
.user-chip:hover { background: var(--gray-100); }
.avatar {
  width: 32px; height: 32px; border-radius: 50%; background: var(--primary);
  color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px;
}
.role-tag {
  font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em;
  padding: 2px 8px; border-radius: 999px; background: var(--primary-light); color: var(--primary-dark);
}
.role-tag.supervisor, .role-tag.executive { background: var(--warning-light); color: #92400e; }

.main-layout { flex: 1; display: flex; min-height: calc(100vh - 60px); }
.sidebar {
  width: 220px; background: #fff; border-right: 1px solid var(--gray-200); padding: 18px 0;
  flex-shrink: 0;
}
.nav-item {
  display: flex; align-items: center; gap: 12px; padding: 11px 22px; color: var(--gray-700);
  font-weight: 500; font-size: 14px; cursor: pointer; border-left: 3px solid transparent;
}
.nav-item i { width: 18px; text-align: center; color: var(--gray-500); }
.nav-item:hover { background: var(--gray-50); }
.nav-item.active { background: var(--primary-light); color: var(--primary-dark); border-left-color: var(--primary); font-weight: 700; }
.nav-item.active i { color: var(--primary); }

.content { flex: 1; padding: 26px 30px; max-width: 1200px; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; flex-wrap: wrap; gap: 12px; }
.page-header h2 { margin: 0; font-size: 22px; }
.page-header p { margin: 4px 0 0; color: var(--gray-500); font-size: 13.5px; }

.card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin-bottom: 20px; }
.card h3 { margin: 0 0 14px; font-size: 16px; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.stat-card { display: flex; flex-direction: column; gap: 4px; }
.stat-card .num { font-size: 28px; font-weight: 800; }
.stat-card .label { font-size: 12.5px; color: var(--gray-500); text-transform: uppercase; letter-spacing: .03em; }
.stat-card.blue .num { color: var(--primary); }
.stat-card.green .num { color: var(--success); }
.stat-card.orange .num { color: var(--warning); }
.stat-card.red .num { color: var(--danger); }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
thead th {
  text-align: left; padding: 10px 12px; background: var(--gray-50); color: var(--gray-500);
  font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: .03em;
  border-bottom: 1px solid var(--gray-200);
}
tbody td { padding: 10px 12px; border-bottom: 1px solid var(--gray-100); vertical-align: middle; }
tbody tr:hover { background: var(--gray-50); }
.table-scroll { overflow-x: auto; }

.status-pill {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 999px;
  font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .02em;
}
.status-pending { background: var(--warning-light); color: #92400e; }
.status-acknowledged { background: #e0e7ff; color: #3730a3; }
.status-approved { background: var(--success-light); color: #166534; }
.status-rejected, .status-declined { background: var(--danger-light); color: #991b1b; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--gray-500); }
.empty-state i { font-size: 36px; margin-bottom: 10px; color: var(--gray-300); }

/* ---- date picker bar ---- */
.date-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.date-bar input[type="date"] {
  padding: 9px 12px; border: 1.5px solid var(--gray-200); border-radius: 8px; font-weight: 600;
}

/* ---- Modal ---- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(17,24,39,.55); display: flex; align-items: center;
  justify-content: center; z-index: 1000; padding: 20px;
}
.modal-box {
  background: #fff; border-radius: 14px; width: 100%; max-width: 520px; max-height: 90vh;
  overflow-y: auto; box-shadow: var(--shadow-lg); animation: pop .15s ease-out;
}
@keyframes pop { from { transform: scale(.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-header { padding: 18px 22px; border-bottom: 1px solid var(--gray-200); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { margin: 0; font-size: 17px; }
.modal-close { background: none; border: none; font-size: 18px; color: var(--gray-500); }
.modal-body { padding: 20px 22px; }
.modal-footer { padding: 16px 22px; border-top: 1px solid var(--gray-200); display: flex; justify-content: flex-end; gap: 10px; }

/* ---- Toast / popup notifications ---- */
#toast-container { position: fixed; top: 76px; right: 20px; z-index: 2000; display: flex; flex-direction: column; gap: 10px; max-width: 340px; }
.toast {
  background: #fff; border-radius: 10px; box-shadow: var(--shadow-lg); padding: 14px 16px;
  border-left: 4px solid var(--primary); animation: slideIn .2s ease-out; display: flex; gap: 10px;
}
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }
.toast i.tico { font-size: 18px; margin-top: 1px; }
.toast.success i.tico { color: var(--success); }
.toast.error i.tico { color: var(--danger); }
.toast.warning i.tico { color: var(--warning); }
.toast .ttitle { font-weight: 700; font-size: 13.5px; margin-bottom: 2px; }
.toast .tmsg { font-size: 12.5px; color: var(--gray-500); }
@keyframes slideIn { from { transform: translateX(120%); opacity:0; } to { transform: translateX(0); opacity:1; } }

/* ---- Notification dropdown ---- */
.notif-dropdown {
  position: absolute; top: 54px; right: 90px; width: 340px; max-height: 420px; overflow-y: auto;
  background: #fff; border-radius: 12px; box-shadow: var(--shadow-lg); z-index: 500;
}
.notif-item { padding: 12px 16px; border-bottom: 1px solid var(--gray-100); font-size: 13px; cursor: pointer; }
.notif-item:hover { background: var(--gray-50); }
.notif-item.unread { background: var(--primary-light); }
.notif-item .ntime { font-size: 11px; color: var(--gray-500); margin-top: 3px; }

/* ---- Upload dropzone ---- */
.dropzone {
  border: 2px dashed var(--gray-300); border-radius: 12px; padding: 40px 20px; text-align: center;
  color: var(--gray-500); cursor: pointer; transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--primary); background: var(--primary-light); }
.dropzone i { font-size: 32px; margin-bottom: 10px; color: var(--primary); }

/* ---- tabs ---- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--gray-200); margin-bottom: 18px; }
.tab-btn {
  background: none; border: none; padding: 10px 16px; font-weight: 600; color: var(--gray-500);
  border-bottom: 2px solid transparent; font-size: 13.5px;
}
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

.chip { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600; background: var(--gray-100); color: var(--gray-700); }

/* Roster editable table */
.editable-cell { padding: 4px 6px; border: 1px solid transparent; border-radius: 4px; min-width: 60px; }
.editable-cell:focus { outline: none; border-color: var(--primary); background: #fff; }

/* mobile nav toggle */
.mobile-nav-toggle { display: none; background: none; border: none; font-size: 20px; color: var(--gray-700); }
@media (max-width: 820px) {
  .mobile-nav-toggle { display: block; }
  .sidebar { position: fixed; left: -240px; top: 60px; bottom: 0; z-index: 300; transition: left .2s; box-shadow: var(--shadow-lg); }
  .sidebar.open { left: 0; }
  .content { padding: 18px 16px; }
  .notif-dropdown { right: 10px; width: calc(100% - 20px); }
}

.text-muted { color: var(--gray-500); }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.flex { display: flex; } .items-center { align-items: center; } .gap-8 { gap: 8px; } .gap-12 { gap: 12px; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }