:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #111827;
  background: #f7f8fb;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --primary: #5b21e8;
  --primary-dark: #4814c8;
  --primary-soft: #f1edff;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
  --border: #e5e7eb;
  --text: #111827;
  --text-muted: #64748b;
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 14px 36px rgba(15, 23, 42, 0.07);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 8px;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: #f7f8fb; }
body { margin: 0; min-width: 320px; min-height: 100vh; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
#app { min-height: 100vh; }

.page-shell { display: grid; gap: 16px; }
.page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.page-title { margin: 0; font-size: 1.45rem; letter-spacing: 0; }
.page-subtitle { margin: 7px 0 0; color: var(--text-muted); font-size: 0.94rem; line-height: 1.55; }
.card { background: var(--surface); border: 1px solid rgba(226, 232, 240, 0.9); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 22px; border-bottom: 1px solid var(--border); }
.card-title { margin: 0; font-size: 1rem; }
.card-body { padding: 22px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.toolbar-group { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.table-wrap { width: 100%; overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; min-width: 760px; }
.data-table th { padding: 11px 14px; text-align: left; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.04em; color: #8b9ab0; background: #fafbfc; border-bottom: 1px solid var(--border); }
.data-table td { padding: 13px 14px; border-bottom: 1px solid #eef2f7; font-size: 0.84rem; color: #334155; vertical-align: middle; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: #fafbff; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.form-group { display: grid; gap: 7px; }
.form-label { color: #334155; font-size: 0.84rem; font-weight: 650; }
.form-help { margin: 0; color: var(--text-muted); font-size: 0.77rem; }
.form-error { margin: 0; color: var(--danger); font-size: 0.78rem; }
.input-control { width: 100%; min-height: 42px; border: 1px solid #d8dee9; border-radius: 7px; padding: 9px 12px; outline: none; color: var(--text); background: #fff; transition: border-color .2s, box-shadow .2s; }
.input-control::placeholder { color: #a0aec0; }
.input-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99, 102, 241, .12); }
textarea.input-control { min-height: 108px; resize: vertical; }
.screen-card { overflow: hidden; border: 1px solid var(--border); border-radius: 8px; background: #fff; box-shadow: var(--shadow-sm); }
.screen-card-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 68px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.screen-card-header h2 { margin: 0; font-size: 1rem; }
.screen-card-header p { margin: 5px 0 0; color: var(--text-muted); font-size: .8rem; }
.feedback { margin: 0; padding: 11px 13px; border: 1px solid; border-radius: 7px; font-size: .82rem; font-weight: 650; }
.feedback.error { border-color: #fecdd3; color: #be123c; background: #fff1f2; }
.feedback.success { border-color: #bbf7d0; color: #047857; background: #ecfdf5; }
.toolbar-field { position: relative; display: block; width: min(100%, 320px); }
.toolbar-field svg { position: absolute; top: 50%; left: 12px; color: #94a3b8; transform: translateY(-50%); pointer-events: none; }
.toolbar-field .input-control { padding-left: 39px; }
.table-user { display: flex; align-items: center; gap: 10px; min-width: 180px; }
.table-avatar { display: grid; flex: 0 0 auto; width: 34px; height: 34px; overflow: hidden; place-items: center; border-radius: 50%; color: #fff; background: #5b21e8; font-size: .75rem; font-weight: 800; }
.table-avatar img { width: 100%; height: 100%; object-fit: cover; }
.table-user-copy { display: grid; gap: 2px; min-width: 0; }
.table-user-copy strong { overflow: hidden; color: #1e293b; font-size: .84rem; text-overflow: ellipsis; white-space: nowrap; }
.table-user-copy span { overflow: hidden; color: var(--text-muted); font-size: .72rem; text-overflow: ellipsis; white-space: nowrap; }
.mobile-only { display: none !important; }
.desktop-only { display: initial; }

@media (max-width: 760px) {
  .page-shell { gap: 18px; }
  .page-header { align-items: stretch; flex-direction: column; }
  .form-grid { grid-template-columns: 1fr; }
  .card-header, .card-body { padding: 17px; }
  .mobile-only { display: inline-flex !important; }
  .desktop-only { display: none !important; }
}