/* =====================================================
   Discovery Trials AI Platform — Design System
   Font: Inter
   Primary: Navy #1e3a5f | Accent: Blue #3b82c4
   ===================================================== */

:root {
  --dt-navy:        #1e3a5f;
  --dt-navy-dark:   #152a45;
  --dt-navy-mid:    #2a4a72;
  --dt-blue:        #3b82c4;
  --dt-blue-light:  #5a9fd4;
  --dt-light-blue:  #e8f4fc;
  --dt-bg:          #f4f7fb;
  --dt-white:       #ffffff;
  --dt-border:      #d1dde8;
  --dt-text:        #1a2635;
  --dt-muted:       #6b7a8d;
  --dt-success:     #16a34a;
  --dt-warning:     #ca8a04;
  --dt-danger:      #dc2626;
  --dt-info:        #2563eb;
  --sidebar-width:  220px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', system-ui, sans-serif; color: var(--dt-text); background: #fff; -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4 { font-weight: 600; line-height: 1.25; }
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }

/* ── Admin Layout ──────────────────────────────────── */
.dt-admin-body { background: var(--dt-bg); min-height: 100vh; }

.admin-topbar {
  position: fixed; top: 0; left: var(--sidebar-width); right: 0; height: 56px;
  background: var(--dt-white); border-bottom: 1px solid var(--dt-border);
  display: flex; align-items: center; gap: 12px; padding: 0 20px;
  z-index: 900;
}
.admin-hamburger { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 6px; }
.admin-hamburger span { display: block; width: 20px; height: 2px; background: var(--dt-navy); border-radius: 1px; }
.admin-topbar-title { font-weight: 600; font-size: 15px; color: var(--dt-navy); }
.admin-topbar-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.admin-topbar-user-info { display: flex; align-items: center; gap: 8px; }
.admin-topbar-avatar { width: 30px; height: 30px; background: var(--dt-blue); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; }
.admin-topbar-username { font-size: 13px; font-weight: 600; display: block; }
.admin-topbar-role { font-size: 11px; color: var(--dt-muted); display: block; }
.admin-topbar-signout-btn { background: none; border: 1px solid var(--dt-border); color: var(--dt-muted); font-size: 12px; padding: 4px 10px; border-radius: 4px; cursor: pointer; }
.admin-topbar-signout-btn:hover { border-color: var(--dt-navy); color: var(--dt-navy); }

/* ── Sidebar ────────────────────────────────────────── */
.admin-sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-width);
  background: var(--dt-navy); display: flex; flex-direction: column;
  z-index: 1000; overflow-y: auto;
}
.admin-sidebar-brand { display: flex; align-items: center; gap: 10px; padding: 18px 16px 14px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.admin-sidebar-brand-icon { font-size: 20px; color: var(--dt-blue-light); flex-shrink: 0; }
.admin-sidebar-brand-text { font-size: 15px; font-weight: 700; color: #fff; }
.admin-sidebar-brand-sub { font-size: 9px; color: var(--dt-blue-light); letter-spacing: .12em; text-transform: uppercase; margin-top: 1px; }

.admin-nav { padding: 8px 0; }
.admin-nav-item {
  display: flex; align-items: center; gap: 9px; padding: 8px 16px;
  font-size: 13px; font-weight: 400; color: rgba(255,255,255,0.6);
  text-decoration: none; transition: background .12s, color .12s;
  cursor: pointer; border: none; background: none; width: 100%; text-align: left;
}
.admin-nav-item:hover { color: #fff; background: rgba(255,255,255,0.07); }
.admin-nav-item.active { color: #fff; background: rgba(59,130,196,0.25); }
.admin-nav-item.active .admin-nav-icon { color: var(--dt-blue-light); }
.admin-nav-icon { width: 18px; text-align: center; font-size: 13px; color: rgba(255,255,255,0.35); flex-shrink: 0; }
.admin-nav-divider { height: 1px; background: rgba(255,255,255,0.08); margin: 8px 0; }
.admin-nav-heading { font-size: 9px; text-transform: uppercase; letter-spacing: .12em; color: rgba(255,255,255,0.35); padding: 6px 16px 2px; }
.admin-sidebar-footer { margin-top: auto; border-top: 1px solid rgba(255,255,255,0.08); padding: 8px 0; }

/* Overlay (mobile) */
.admin-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 999; }
.admin-overlay.open { display: block; }

.admin-main { margin-left: var(--sidebar-width); padding-top: 56px; min-height: 100vh; padding: 56px 24px 24px; }

/* ── Login Page ─────────────────────────────────────── */
.dt-login-page { min-height: 100vh; background: var(--dt-navy); display: flex; align-items: center; justify-content: center; }
.dt-login-card { background: var(--dt-white); border-radius: 12px; padding: 40px 36px; width: 100%; max-width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.dt-login-brand { text-align: center; margin-bottom: 28px; }
.dt-login-icon { font-size: 36px; color: var(--dt-blue); margin-bottom: 10px; }
.dt-login-brand h1 { font-size: 22px; color: var(--dt-navy); margin-bottom: 4px; }
.dt-login-brand p { font-size: 13px; color: var(--dt-muted); }
.dt-login-env-badge { text-align: center; margin-top: 16px; font-size: 11px; color: var(--dt-warning); text-transform: uppercase; letter-spacing: .1em; }

/* ── Page Header ────────────────────────────────────── */
.page-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }
.page-header h1 { font-size: 22px; color: var(--dt-navy); }
.page-subtitle { font-size: 13px; color: var(--dt-muted); margin-top: 2px; }
.page-actions { display: flex; gap: 8px; align-items: center; }

/* ── Stat Grid ──────────────────────────────────────── */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--dt-white); border: 1px solid var(--dt-border); border-radius: 10px; padding: 20px 18px; }
.stat-card-alert { border-left: 3px solid var(--dt-blue); }
.stat-icon { font-size: 20px; color: var(--dt-blue); margin-bottom: 10px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--dt-navy); line-height: 1; }
.stat-label { font-size: 12px; color: var(--dt-muted); margin-top: 4px; }

/* ── Dashboard Grid ─────────────────────────────────── */
.dashboard-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); gap: 20px; }
.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }

/* ── Cards ──────────────────────────────────────────── */
.card { background: var(--dt-white); border: 1px solid var(--dt-border); border-radius: 10px; overflow: hidden; }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--dt-border); }
.card-header h3 { font-size: 14px; font-weight: 600; color: var(--dt-navy); }
.card-body { padding: 18px; }
.card-body.p-0 { padding: 0; }
.card-footer { padding: 12px 18px; border-top: 1px solid var(--dt-border); background: var(--dt-bg); }
.mt-3 { margin-top: 16px; }
.mb-3 { margin-bottom: 16px; }

/* ── Tables ─────────────────────────────────────────── */
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th { text-align: left; padding: 10px 14px; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--dt-muted); border-bottom: 1px solid var(--dt-border); background: var(--dt-bg); }
.table td { padding: 10px 14px; border-bottom: 1px solid var(--dt-border); }
.table tr:last-child td { border-bottom: none; }
.table-hover tr:hover td { background: var(--dt-light-blue); }
.table-sm th, .table-sm td { padding: 7px 14px; }
.text-center { text-align: center; }
.py-4 { padding-top: 24px; padding-bottom: 24px; }

/* ── Forms ──────────────────────────────────────────── */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--dt-navy); margin-bottom: 4px; }
.form-control { display: block; width: 100%; padding: 8px 10px; font-size: 13px; border: 1px solid var(--dt-border); border-radius: 6px; background: #fff; color: var(--dt-text); outline: none; font-family: inherit; }
.form-control:focus { border-color: var(--dt-blue); box-shadow: 0 0 0 3px rgba(59,130,196,0.12); }
.form-control-sm { padding: 5px 8px; font-size: 12px; }
.form-control-xs { padding: 3px 6px; font-size: 11px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-group-sm { flex: 0 0 80px; }
.form-actions { display: flex; gap: 8px; margin-top: 20px; }
.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ── Buttons ────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; font-size: 13px; font-weight: 500; border-radius: 6px; border: none; cursor: pointer; font-family: inherit; text-decoration: none; transition: background .12s, border-color .12s; }
.btn-primary { background: var(--dt-blue); color: #fff; }
.btn-primary:hover { background: var(--dt-navy); }
.btn-secondary { background: var(--dt-navy); color: #fff; }
.btn-secondary:hover { background: var(--dt-navy-dark); }
.btn-outline { background: transparent; border: 1px solid var(--dt-border); color: var(--dt-navy); }
.btn-outline:hover { border-color: var(--dt-blue); color: var(--dt-blue); }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-xs { padding: 3px 8px; font-size: 11px; }
.btn-block { width: 100%; justify-content: center; }

/* ── Badges ─────────────────────────────────────────── */
.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-status.badge-new, .badge-status.badge-active { background: #dcfce7; color: #15803d; }
.badge-status.badge-enrolled { background: #dbeafe; color: #1d4ed8; }
.badge-status.badge-inscreening { background: #ede9fe; color: #7c3aed; }
.badge-status.badge-randomized { background: #fef9c3; color: #a16207; }
.badge-status.badge-screenfail, .badge-status.badge-inactive, .badge-status.badge-dnq { background: #fee2e2; color: #b91c1c; }
.badge-status.badge-draft { background: #f3f4f6; color: #6b7280; }
.badge-status.badge-paused { background: #fef3c7; color: #92400e; }
.badge-status.badge-completed { background: #d1fae5; color: #065f46; }
.badge-log.badge-error { background: #fee2e2; color: #b91c1c; }
.badge-log.badge-warning { background: #fef3c7; color: #92400e; }
.badge-log.badge-info { background: #dbeafe; color: #1d4ed8; }

/* ── Alerts / Flash ─────────────────────────────────── */
.flash-container { position: fixed; top: 12px; right: 16px; z-index: 9999; min-width: 260px; max-width: 400px; }
.alert { padding: 12px 16px; border-radius: 8px; font-size: 13px; display: flex; align-items: center; justify-content: space-between; gap: 10px; box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.alert-success { background: #dcfce7; color: #15803d; border: 1px solid #86efac; }
.alert-danger { background: #fee2e2; color: #b91c1c; border: 1px solid #fca5a5; }
.alert-info { background: #dbeafe; color: #1d4ed8; border: 1px solid #93c5fd; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fcd34d; }
.btn-close { background: none; border: none; font-size: 16px; cursor: pointer; color: inherit; opacity: .6; flex-shrink: 0; }

/* ── Detail List ────────────────────────────────────── */
dl.detail-list { display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; font-size: 13px; }
dl.detail-list dt { color: var(--dt-muted); font-weight: 500; white-space: nowrap; }
dl.detail-list dd { color: var(--dt-text); }

/* ── Timeline ───────────────────────────────────────── */
.timeline { display: flex; flex-direction: column; gap: 12px; }
.timeline-item { display: flex; gap: 12px; }
.timeline-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--dt-blue); flex-shrink: 0; margin-top: 5px; }
.timeline-content { flex: 1; font-size: 13px; }
.timeline-meta { font-size: 11px; color: var(--dt-muted); margin-top: 2px; }

/* ── Pipeline bars ──────────────────────────────────── */
.pipeline-row { margin-bottom: 10px; }
.pipeline-label { display: flex; align-items: center; justify-content: space-between; margin-bottom: 4px; }
.pipeline-count { font-size: 13px; font-weight: 600; }
.pipeline-bar { height: 6px; background: var(--dt-border); border-radius: 3px; overflow: hidden; }
.pipeline-fill { height: 100%; background: var(--dt-blue); border-radius: 3px; }

/* ── Pagination ─────────────────────────────────────── */
.pagination { display: flex; align-items: center; gap: 12px; justify-content: center; }

/* ── Modal ──────────────────────────────────────────── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 2000; }
.modal-card { background: #fff; border-radius: 10px; width: 100%; max-width: 480px; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--dt-border); }
.modal-header h3 { font-size: 16px; color: var(--dt-navy); }
.modal-header button { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--dt-muted); }
.modal-body { padding: 20px; }
.modal-footer { padding: 14px 20px; border-top: 1px solid var(--dt-border); display: flex; justify-content: flex-end; gap: 8px; }

/* ── Checkbox Grid ──────────────────────────────────── */
.checkbox-grid { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.checkbox-label { display: flex; align-items: center; gap: 6px; font-size: 12px; cursor: pointer; }

/* ── Helpers ────────────────────────────────────────── */
.text-muted { color: var(--dt-muted); }
.text-sm { font-size: 12px; }

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 768px) {
  .admin-sidebar { transform: translateX(-100%); transition: transform .25s; }
  .admin-sidebar.open { transform: translateX(0); }
  .admin-topbar { left: 0; }
  .admin-hamburger { display: flex; }
  .admin-main { margin-left: 0; }
  .form-row { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .dashboard-grid { grid-template-columns: 1fr; }
}