:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-hover: #f7f7f8;
  --border: #e8e8ec;
  --border-light: #f0f0f3;
  --text: #1a1a1a;
  --text-secondary: #71717a;
  --text-muted: #a1a1aa;
  --accent: #18181b;
  --accent-hover: #27272a;
  --accent-subtle: #f4f4f5;
  --green: #16a34a;
  --green-bg: #f0fdf4;
  --red: #dc2626;
  --red-bg: #fef2f2;
  --amber: #d97706;
  --amber-bg: #fffbeb;
  --blue: #2563eb;
  --blue-bg: #eff6ff;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  --shadow-lg: 0 4px 24px rgba(0,0,0,.06);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 14px; }
body { font-family: var(--font); background: var(--bg); color: var(--text); -webkit-font-smoothing: antialiased; }
.hidden { display: none !important; }
.page { min-height: 100vh; }
::selection { background: var(--accent); color: #fff; }

/* ===== Login ===== */
#login-page { display: flex; align-items: center; justify-content: center; background: #fff; }
.login-card {
  width: 380px; padding: 48px 40px;
  border: 1px solid var(--border); border-radius: 16px;
  background: var(--surface); box-shadow: var(--shadow-lg);
}
.login-card h1 { font-size: 26px; font-weight: 700; letter-spacing: -.5px; color: var(--text); text-align: center; }
.login-card .subtitle { text-align: center; color: var(--text-muted); font-size: 13px; margin: 6px 0 32px; letter-spacing: .3px; }

/* ===== Forms ===== */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .5px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; font-family: var(--font); outline: none; background: var(--surface);
  transition: border .15s, box-shadow .15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(24,24,27,.06);
}
.form-group textarea { resize: vertical; font-family: var(--mono); font-size: 13px; line-height: 1.6; }
.form-group.row { display: flex; gap: 10px; }
.form-group.row input { flex: 1; }
.form-group.row button {
  white-space: nowrap; padding: 10px 18px; background: var(--accent); color: #fff;
  border: none; border-radius: var(--radius-sm); cursor: pointer; font-size: 13px; font-weight: 500;
  transition: background .15s;
}
.form-group.row button:hover { background: var(--accent-hover); }
.form-group.row button:disabled { background: var(--text-muted); cursor: not-allowed; }

/* ===== Buttons ===== */
.btn-primary {
  padding: 10px 24px; background: var(--accent); color: #fff; border: none;
  border-radius: var(--radius-sm); cursor: pointer; font-size: 14px; font-weight: 500;
  transition: background .15s, transform .1s;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(.98); }
.btn-primary.full { width: 100%; padding: 12px; }

.btn-sm { padding: 5px 12px; font-size: 12px; font-weight: 500; border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; background: var(--surface); color: var(--text-secondary); transition: all .15s; }
.btn-sm:hover { background: var(--accent-subtle); border-color: var(--text-muted); }
.btn-danger { background: var(--red-bg); color: var(--red); border-color: transparent; }
.btn-danger:hover { background: #fee2e2; }
.btn-info { background: var(--accent-subtle); color: var(--text); border-color: transparent; }
.btn-info:hover { background: var(--border); }
.btn-success { background: var(--green-bg); color: var(--green); border-color: transparent; }
.btn-success:hover { background: #dcfce7; }

/* ===== Layout ===== */
#main-page { display: flex; }
.sidebar {
  width: 240px; background: var(--surface); min-height: 100vh; padding: 28px 0;
  display: flex; flex-direction: column; position: fixed;
  border-right: 1px solid var(--border);
}
.sidebar .logo { font-size: 20px; font-weight: 800; padding: 0 28px 24px; color: var(--text); letter-spacing: -.5px; }
.sidebar .user-info {
  padding: 0 28px 18px; font-size: 12px; color: var(--text-muted);
  border-bottom: 1px solid var(--border-light); margin-bottom: 8px;
}
.nav-menu { list-style: none; flex: 1; padding: 0 12px; }
.nav-menu li {
  padding: 10px 16px; cursor: pointer; font-size: 13px; font-weight: 500;
  border-radius: var(--radius-sm); margin-bottom: 2px; color: var(--text-secondary);
  transition: all .15s;
}
.nav-menu li:hover { background: var(--accent-subtle); color: var(--text); }
.nav-menu li.active { background: var(--accent); color: #fff; }
.btn-logout {
  margin: 16px 20px; padding: 8px; background: transparent;
  border: 1px solid var(--border); color: var(--text-muted); border-radius: var(--radius-sm);
  cursor: pointer; font-size: 12px; font-weight: 500; transition: all .15s;
}
.btn-logout:hover { border-color: var(--red); color: var(--red); }

.content { margin-left: 240px; flex: 1; padding: 32px 40px; max-width: 1200px; }
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.toolbar h2 { font-size: 22px; font-weight: 700; letter-spacing: -.3px; }
.toolbar h3, h3 { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--text); }
.filters { display: flex; gap: 10px; }
.filters select, .filters input {
  padding: 7px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 13px; background: var(--surface); color: var(--text);
}

/* ===== Table ===== */
.data-table {
  width: 100%; border-collapse: collapse; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.data-table th {
  padding: 10px 16px; text-align: left; font-size: 11px; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: .6px;
  background: var(--bg); border-bottom: 1px solid var(--border);
}
.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--border-light); font-size: 13px; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--surface-hover); }
.data-table td .btn-sm { margin-right: 4px; }
.table-scroll { overflow-x: auto; }

/* ===== Badges ===== */
.badge {
  display: inline-flex; align-items: center; padding: 2px 10px; border-radius: 99px;
  font-size: 11px; font-weight: 600; letter-spacing: .2px;
}
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; margin-right: 6px; }
.badge-success { background: var(--green-bg); color: var(--green); }
.badge-success::before { background: var(--green); }
.badge-danger { background: var(--red-bg); color: var(--red); }
.badge-danger::before { background: var(--red); }
.badge-warning { background: var(--amber-bg); color: var(--amber); }
.badge-warning::before { background: var(--amber); }
.badge-normal { background: var(--accent-subtle); color: var(--text-muted); }
.badge-normal::before { background: var(--text-muted); }

/* ===== Stats ===== */
.stats-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 32px; }
.stat-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px;
}
.stat-card .label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px; }
.stat-card .value { font-size: 28px; font-weight: 700; letter-spacing: -.5px; font-variant-numeric: tabular-nums; }
.stat-card .value.green { color: var(--green); }
.stat-card .value.red { color: var(--red); }
.stat-card .value.blue { color: var(--blue); }

/* ===== Modal ===== */
.modal {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,.3); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; z-index: 1000;
  animation: fadeIn .15s; cursor: pointer;
}
.modal-content {
  background: var(--surface); border-radius: 14px; width: 640px;
  max-height: 85vh; display: flex; flex-direction: column;
  box-shadow: var(--shadow-lg); border: 1px solid var(--border);
  cursor: default;
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-scroll { flex: 1; overflow-y: auto; }
.modal-body { padding: 24px; }
.btn-close {
  background: none; border: none; font-size: 24px; cursor: pointer;
  color: var(--text-secondary); width: 36px; height: 36px;
  border-radius: var(--radius-sm); display: flex; align-items: center;
  justify-content: center; transition: all .15s; flex-shrink: 0;
}
.btn-close:hover { background: var(--accent-subtle); color: var(--text); }

/* ===== Detail ===== */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 20px 24px; }
.detail-item .label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .4px; }
.detail-item .val { font-size: 14px; font-weight: 500; margin-top: 4px; }
.detail-section { padding: 0 24px 20px; }
.detail-section h4 { font-size: 13px; font-weight: 600; margin-bottom: 12px; color: var(--text-secondary); }

/* ===== Result ===== */
.result-box { margin-top: 20px; padding: 14px 18px; border-radius: var(--radius-sm); font-size: 13px; font-weight: 500; }
.result-box.success { background: var(--green-bg); color: var(--green); }
.result-box.error { background: var(--red-bg); color: var(--red); }

/* ===== Pagination ===== */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 20px; }
.pagination button {
  padding: 6px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); cursor: pointer; font-size: 13px; font-weight: 500;
  color: var(--text-secondary); transition: all .15s;
}
.pagination button:hover { background: var(--accent-subtle); }
.pagination button.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.pagination button:disabled { opacity: .4; cursor: not-allowed; }

/* ===== Toast ===== */
.toast {
  position: fixed; top: 24px; right: 24px; padding: 12px 20px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500; z-index: 2000; animation: slideIn .2s; box-shadow: var(--shadow-lg);
}
.toast.success { background: var(--accent); color: #fff; }
.toast.error { background: var(--red); color: #fff; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

/* ===== Captcha ===== */
.captcha-loading { text-align: center; padding: 32px 0; color: var(--text-muted); font-size: 14px; }
.captcha-label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px; }
.captcha-value {
  font-family: var(--mono); font-size: 28px; font-weight: 700; letter-spacing: 2px;
  background: var(--accent-subtle); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 16px 20px; text-align: center; margin-bottom: 16px; word-break: break-all;
  user-select: all; cursor: text;
}
.btn-blue { background: var(--blue-bg); color: var(--blue); border-color: transparent; }
.btn-blue:hover { background: #dbeafe; }

/* ===== Empty State ===== */
.empty-state { text-align: center; padding: 48px 0; color: var(--text-muted); }
.empty-state p { font-size: 13px; }