:root {
  --bg: #0b0f19;
  --bg-elevated: #111827;
  --card: #151b2b;
  --card-hover: #1a2235;
  --border: #1f2937;
  --border-strong: #334155;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 10px 40px rgba(0,0,0,.35);
  --shadow-sm: 0 4px 12px rgba(0,0,0,.25);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Header */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  background: rgba(17,24,39,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.brand h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand .sub {
  display: block;
  color: var(--text-secondary);
  font-size: 12px;
  margin-top: 4px;
}

/* Auth bar */
.authbar {
  display: flex;
  align-items: center;
  gap: 14px;
}
.authbar .who {
  color: var(--text-secondary);
  font-size: 13px;
  background: var(--card);
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.authbar .who strong { color: var(--text); font-weight: 600; }

/* Tabs */
.tabs {
  display: flex;
  gap: 10px;
  padding: 22px 32px 0;
  max-width: 1200px;
  margin: 0 auto;
}
.tabs .tab {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 10px 22px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all .18s ease;
}
.tabs .tab:hover { border-color: var(--border-strong); color: var(--text); }
.tabs .tab.active {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 16px rgba(59,130,246,.35);
}

/* Layout */
main {
  padding: 24px 32px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
  transition: border-color .2s ease;
}
.panel:hover { border-color: var(--border-strong); }
.panel.hidden, .modal.hidden, .login-gate.hidden, .tab.hidden, .view.hidden { display: none !important; }
.panel h2 {
  margin: 0 0 18px;
  font-size: 17px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}
.panel h2::before {
  content: '';
  width: 5px;
  height: 20px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

/* Buttons */
button, .btn {
  background: linear-gradient(90deg, var(--primary), #2563eb);
  color: #fff;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 9px 18px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: transform .12s ease, box-shadow .18s ease, filter .18s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
button:hover, .btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(59,130,246,.35);
  filter: brightness(1.08);
}
button:active { transform: translateY(0); }
button.secondary {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text);
}
button.secondary:hover { background: var(--card-hover); box-shadow: none; }
button.danger {
  background: linear-gradient(90deg, #dc2626, var(--danger));
}
button.danger:hover { box-shadow: 0 6px 18px rgba(239,68,68,.35); }
button.small { padding: 5px 12px; font-size: 12px; }
button.locked {
  background: var(--bg-elevated) !important;
  border: 1px dashed var(--border-strong) !important;
  color: var(--text-muted) !important;
  cursor: not-allowed !important;
  box-shadow: none !important;
}
button.locked:hover {
  transform: none !important;
  filter: none !important;
  box-shadow: none !important;
}

/* Inputs */
input[type="text"], input[type="password"], input[type="number"], select {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-size: 13px;
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease;
}
input[type="text"]:focus, input[type="password"]:focus, input[type="number"]:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,.18);
}
input[type="file"] {
  display: none;
}
.file-drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 34px 24px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all .2s ease;
  background: var(--bg-elevated);
}
.file-drop:hover {
  border-color: var(--primary);
  background: rgba(59,130,246,.06);
}
.file-drop .icon { font-size: 32px; opacity: .7; }
.file-drop .filename {
  color: var(--text);
  font-weight: 600;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}
.toolbar label { color: var(--text-secondary); font-size: 13px; display: flex; align-items: center; gap: 8px; }
.toolbar input[type="number"] { width: 74px; text-align: center; }

/* Info / pre blocks */
.info {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  color: var(--text-secondary);
  font-size: 13px;
  white-space: pre-wrap;
}
pre.info {
  font-family: "SF Mono", Consolas, monospace;
  font-size: 12px;
  overflow-x: auto;
}

/* Stepper */
.stepper {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 14px 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.step {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
}
.step .num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--card);
  border: 1px solid var(--border-strong);
  font-size: 12px;
}
.step.active { color: var(--text); }
.step.active .num { background: linear-gradient(135deg, var(--primary), var(--accent)); border-color: transparent; color: #fff; }
.step.done { color: var(--success); }
.step.done .num { background: rgba(16,185,129,.15); border-color: var(--success); color: var(--success); }
.stepper .sep {
  flex: 1;
  height: 1px;
  background: var(--border);
  max-width: 40px;
}

/* PDF viewer */
#viewer {
  display: flex;
  flex-direction: column;
  gap: 22px;
  align-items: center;
  padding: 10px 0;
}
.page-wrap {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #fff;
}
.page-wrap canvas { display: block; }
.overlay { position: absolute; inset: 0; cursor: crosshair; }
.page-label {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(15,23,42,.8);
  color: #fff;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}
.field-box {
  position: absolute;
  border: 2px dashed var(--primary);
  background: rgba(59,130,246,.14);
  color: var(--primary-light);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  pointer-events: none;
  box-shadow: 0 0 0 3px rgba(59,130,246,.12);
}

/* Sign queue */
#signQueue {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}
#signQueue .q-item {
  cursor: pointer;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: all .18s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#signQueue .q-item:hover {
  border-color: var(--primary);
  background: rgba(59,130,246,.08);
  color: var(--text);
}
#signQueue .q-item.done { border-color: var(--success); color: var(--success); background: rgba(16,185,129,.08); }
#signQueue .q-item .badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--card);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(2,6,23,.7);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal-box {
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 26px;
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow);
}
.modal-box h3 { margin: 0 0 18px; font-size: 18px; }
.modal-box label { display: block; margin: 12px 0; font-size: 13px; color: var(--text-secondary); }
.modal-box input, .modal-box select {
  width: 100%;
  margin: 6px 0 0;
}
.modal-actions {
  margin-top: 22px;
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* 微信扫码登录 */
.wx-login-wrap { margin-top: 14px; text-align: center; }
.wx-btn {
  width: 100%;
  background: #07c160;
  color: #fff;
  border: 1px solid #07c160;
  font-weight: 600;
}
.wx-btn:hover { background: #06ad56; border-color: #06ad56; }
#wxqr { display: flex; justify-content: center; padding: 12px 0; min-height: 300px; }
#wxqr iframe { border: none; }

/* Signature pad */
#pad {
  width: 100%;
  height: 170px;
  background: #fff;
  border-radius: var(--radius-sm);
  touch-action: none;
  margin: 10px 0;
  cursor: crosshair;
}

/* Links */
a { color: var(--primary-light); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }

/* Contracts */
#contractsTable {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
#contractsTable th, #contractsTable td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
#contractsTable th {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .4px;
}
#contractsTable tr:last-child td { border-bottom: 0; }
#contractsTable tr:hover td { background: var(--card-hover); }
#contractsTable td { color: var(--text-secondary); }
#contractsTable td strong { color: var(--text); }
#contractsTable button { margin-right: 6px; }

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.status-badge.signed { background: rgba(16,185,129,.12); color: var(--success); }
.status-badge.pending { background: rgba(245,158,11,.12); color: var(--warning); }

/* Contract detail */
#contractDetail {
  animation: fadeIn .25s ease;
}
#cdViewer {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  margin-top: 16px;
}
#cdViewer canvas {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  background: #fff;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Result card */
.result-card {
  display: grid;
  gap: 12px;
}
.result-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.result-row:last-child { border-bottom: 0; }
.result-row .label { color: var(--text-secondary); }
.result-row .value { color: var(--text); font-weight: 600; font-family: monospace; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}
.empty-state .icon { font-size: 42px; margin-bottom: 12px; opacity: .5; }

/* Admin link (shared by main app + admin page) */
a.admin-link {
  padding: 7px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}
a.admin-link:hover { background: var(--card-hover); text-decoration: none; }

/* Admin stats */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat-card .num {
  font-size: 30px;
  font-weight: 700;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-card .lbl { color: var(--text-secondary); font-size: 13px; margin-top: 6px; }

/* Admin login form */
#loginView label { display: block; margin: 12px 0; color: var(--text-secondary); font-size: 13px; }
#loginView input { width: 100%; margin-top: 6px; }
.role-sel { padding: 5px 8px; font-size: 12px; }

/* 合同起草：富文本编辑器 */
.rt-toolbar { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
.rt-toolbar button {
  min-width: 34px; padding: 7px 10px; font-size: 13px;
  background: var(--card); border: 1px solid var(--border); border-radius: 8px; color: var(--text); cursor: pointer;
}
.rt-toolbar button:hover { background: var(--card-hover); }
.rt-editor {
  min-height: 240px; max-height: 460px; overflow: auto;
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; background: var(--card); color: var(--text);
  line-height: 1.8; font-size: 14px; outline: none;
}
.rt-editor:empty:before { content: attr(placeholder); color: var(--text-muted); }
.rt-editor h3 { font-size: 17px; margin: 10px 0 6px; }
.rt-editor ul, .rt-editor ol { padding-left: 24px; }
.rt-editor p { margin: 8px 0; }

/* 生成副本弹窗 */
.gen-rows { display: flex; flex-direction: column; gap: 8px; margin: 6px 0 12px; }
.gen-row { display: flex; gap: 8px; align-items: center; }
.gen-user { flex: 1; padding: 9px 10px; border-radius: 8px; background: var(--card); border: 1px solid var(--border); color: var(--text); }
.gen-del { padding: 4px 10px; }

/* 副本查看/签署弹窗 */
.modal-box.wide { max-width: 760px; width: 92%; max-height: 88vh; overflow: auto; }
.modal-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 10px; }
.modal-head h3 { margin: 0; }
.iv-meta { color: var(--text-secondary); font-size: 13px; margin-bottom: 12px; }
.iv-content {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; background: var(--card); color: var(--text); line-height: 1.8; font-size: 14px; max-height: 340px; overflow: auto;
}
.iv-content h3 { font-size: 17px; }
.iv-content img { max-width: 100%; }
.iv-sign-block { display: flex; gap: 26px; align-items: flex-end; flex-wrap: wrap; margin-top: 18px; border-top: 1px dashed var(--border-strong); padding-top: 14px; }
.iv-sb-item .who { font-size: 12px; color: var(--text-muted); margin-bottom: 6px; }
.iv-verify { margin-top: 16px; background: var(--card-hover); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; font-size: 12px; color: var(--text-secondary); }
.iv-verify code { word-break: break-all; font-size: 11px; }
.num { display: inline-block; background: var(--card-hover); border: 1px solid var(--border-strong); border-radius: 6px; padding: 2px 8px; font-weight: 600; letter-spacing: .5px; font-size: 13px; }
.sign-pad { width: 100%; max-width: 560px; height: 170px; background: #fff; border: 1px solid var(--border-strong); border-radius: var(--radius); cursor: crosshair; display: block; }

/* 状态徽标（副本表） */
.status-badge.signed { color: var(--success); }
.status-badge.pending { color: var(--warning, #d98b00); }

/* 登录墙：未登录时整页只显示登录卡片 */
.login-gate {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background: radial-gradient(1200px 600px at 50% -10%, rgba(99,102,241,.18), transparent 60%), var(--bg);
}
.login-card {
  width: 100%; max-width: 380px;
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 28px 26px; box-shadow: 0 20px 60px rgba(0,0,0,.35);
}
.login-card .brand { margin-bottom: 18px; }
.login-card .brand h1 { font-size: 19px; margin: 0 0 6px; }
.login-card .brand .sub { font-size: 12px; color: var(--text-muted); line-height: 1.5; display: block; }
.login-card h2 { margin: 0 0 16px; font-size: 17px; }
.login-card label { display: block; margin: 12px 0; font-size: 13px; color: var(--text-secondary); }
.hint { font-size: 12px; color: var(--text-muted); margin: -6px 0 12px; line-height: 1.5; }
.authModal .hint, .modal-box .hint { margin-top: -6px; }
.login-card input, .login-card select {
  width: 100%; margin-top: 6px; padding: 11px 12px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text); font-size: 14px; box-sizing: border-box;
}
.login-card .modal-actions { margin-top: 18px; }
body.locked > header, body.locked > nav.tabs, body.locked > main { display: none !important; }

/* Responsive */
@media (max-width: 768px) {
  header { padding: 14px 18px; flex-direction: column; align-items: flex-start; gap: 10px; }
  .tabs { padding: 16px 18px 0; }
  main { padding: 16px 18px 32px; }
  .panel { padding: 18px; }
  #contractsTable th, #contractsTable td { padding: 10px; }
  .toolbar { flex-direction: column; align-items: stretch; }
}