*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #4f46e5; --primary-hover: #6366f1; --primary-light: #eef2ff; --primary-glow: rgba(79,70,229,.08);
  --bg: #f8fafc; --bg-card: #ffffff; --bg-input: #f1f5f9; --bg-hover: #f8fafc;
  --border: #e2e8f0; --border-light: #cbd5e1;
  --text: #1e293b; --text-muted: #64748b; --text-dim: #94a3b8;
  --success: #059669; --danger: #dc2626; --warning: #d97706; --info: #2563eb;
  --radius: 16px; --radius-sm: 10px; --radius-xs: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,.04), 0 2px 4px rgba(0,0,0,.03);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.06), 0 4px 10px rgba(0,0,0,.04);
  --transition: .2s cubic-bezier(.4,0,.2,1);
}
body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; line-height: 1.6; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }
button { cursor: pointer; border: none; font: inherit; }
input, textarea, select {
  background: var(--bg-input); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px; font: inherit; width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); background: #fff; }
input::placeholder, textarea::placeholder { color: var(--text-dim); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border-radius: var(--radius-sm); font-weight: 600; font-size: .88rem;
  transition: all var(--transition); border: 1px solid transparent;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); box-shadow: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); box-shadow: 0 4px 14px rgba(79,70,229,.25); }
.btn-danger { background: #fef2f2; color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-sm { padding: 6px 14px; font-size: .8rem; border-radius: var(--radius-xs); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-input); color: var(--text); border-color: var(--border-light); }

/* Cards */
.card {
  background: var(--bg-card); border-radius: var(--radius); padding: 20px;
  border: 1px solid var(--border); box-shadow: var(--shadow);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); border-color: var(--border-light); }

.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: .72rem; font-weight: 600; letter-spacing: .02em; }
.badge-online { background: #ecfdf5; color: var(--success); }
.badge-offline { background: #f1f5f9; color: var(--text-muted); }
.badge-expired { background: #fef2f2; color: var(--danger); }

/* Nav */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 28px; background: rgba(255,255,255,.8); backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100;
}
.nav-brand { font-size: 1.15rem; font-weight: 800; color: var(--primary); letter-spacing: -.02em; display: flex; align-items: center; gap: 6px; }
.nav-links { display: flex; gap: 10px; align-items: center; }

/* Hero */
.hero {
  text-align: center; padding: 80px 24px 60px;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 100%);
  position: relative;
}
.hero::before {
  content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(79,70,229,.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero h1 { font-size: 2.6rem; margin-bottom: 14px; font-weight: 800; letter-spacing: -.03em; position: relative; }
.hero h1 span { background: linear-gradient(135deg, var(--primary), #7c3aed); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { color: var(--text-muted); font-size: 1.05rem; max-width: 560px; margin: 0 auto; position: relative; }

/* Auth */
.auth-container { max-width: 420px; margin: 0 auto; padding: 24px; }
.auth-container .card { display: flex; flex-direction: column; gap: 16px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
.auth-tabs { display: flex; gap: 0; margin-bottom: 8px; background: var(--bg-input); border-radius: var(--radius-sm); padding: 3px; }
.auth-tabs button { flex: 1; padding: 8px; background: transparent; color: var(--text-muted); border: none; border-radius: var(--radius-xs); transition: all var(--transition); font-weight: 500; }
.auth-tabs button.active { background: #fff; color: var(--primary); box-shadow: var(--shadow); font-weight: 600; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .82rem; color: var(--text-muted); font-weight: 500; }

/* Dashboard sidebar layout */
.dashboard { display: grid; grid-template-columns: 240px 1fr; min-height: calc(100vh - 53px); }
.sidebar { background: #fff; padding: 20px 12px; border-right: 1px solid var(--border); }
.sidebar-item { display: block; padding: 9px 14px; border-radius: var(--radius-xs); color: var(--text-muted); margin-bottom: 2px; transition: all var(--transition); font-size: .88rem; font-weight: 500; }
.sidebar-item:hover { background: var(--primary-light); color: var(--primary); }
.sidebar-item.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.main-content { padding: 28px 32px; overflow-y: auto; background: var(--bg); }

/* Grid */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.section-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 18px; letter-spacing: -.01em; color: var(--text); }

/* Bot card */
.bot-card { display: flex; flex-direction: column; gap: 10px; transition: all var(--transition); }
.bot-card:hover { border-color: var(--primary); box-shadow: 0 4px 16px rgba(79,70,229,.08); }
.bot-card-header { display: flex; justify-content: space-between; align-items: center; }
.bot-card-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }

/* QR */
.qr-container { text-align: center; padding: 20px; }
.qr-container img { max-width: 240px; border-radius: var(--radius-sm); background: #fff; padding: 8px; box-shadow: var(--shadow); }
.qr-status { margin-top: 12px; color: var(--text-muted); font-size: .9rem; }

/* Table */
.table-wrap { overflow-x: auto; border-radius: var(--radius-sm); border: 1px solid var(--border); background: #fff; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: .85rem; }
th { color: var(--text-muted); font-weight: 600; background: var(--bg-input); font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; }
tr:hover td { background: var(--primary-light); }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.3); backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; z-index: 200; }
.modal { background: #fff; border-radius: var(--radius); padding: 28px; max-width: 480px; width: 92%; border: 1px solid var(--border); box-shadow: var(--shadow-lg); }
.modal h3 { margin-bottom: 18px; font-size: 1.1rem; font-weight: 700; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }

/* Toast */
.toast { position: fixed; top: 68px; right: 20px; padding: 12px 20px; border-radius: var(--radius-sm); color: #fff; font-weight: 500; font-size: .9rem; z-index: 300; animation: toastIn .35s ease-out; box-shadow: var(--shadow-lg); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
@keyframes toastIn { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Toggle */
.toggle { position: relative; width: 44px; height: 24px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; inset: 0; background: #cbd5e1; border-radius: 24px; cursor: pointer; transition: var(--transition); }
.toggle-slider::before { content: ''; position: absolute; width: 18px; height: 18px; left: 3px; bottom: 3px; background: #fff; border-radius: 50%; transition: var(--transition); box-shadow: 0 1px 3px rgba(0,0,0,.1); }
.toggle input:checked + .toggle-slider { background: var(--primary); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

.hidden { display: none !important; }

/* ── Dashboard overview cards ── */
.overview-card {
  padding: 18px; text-align: center; border-radius: var(--radius-sm);
  background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow);
  transition: all var(--transition);
}
.overview-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--border-light); }
.overview-card .oc-icon { font-size: 1.6rem; margin-bottom: 4px; }
.overview-card .oc-value { font-size: 1.3rem; font-weight: 800; letter-spacing: -.02em; }
.overview-card .oc-label { font-size: .75rem; color: var(--text-muted); margin-top: 2px; }

/* ── Chart containers ── */
.chart-card { padding: 16px; min-width: 260px; flex: 1; }
.chart-card .chart-title { font-weight: 600; font-size: .9rem; margin-bottom: 10px; color: var(--text); }
.chart-bar { border-radius: 3px 3px 0 0; transition: height .4s ease-out; min-width: 6px; }

/* ── Message bubbles ── */
.msg-bubble {
  display: flex; gap: 10px; padding: 10px 14px; border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.msg-bubble:hover { background: var(--bg-input); }
.msg-bubble.msg-in { background: var(--bg-input); }
.msg-bubble.msg-out { background: var(--primary-light); flex-direction: row-reverse; }
.msg-avatar { font-size: 1.3rem; flex-shrink: 0; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--bg-input); }
.msg-body { flex: 1; }
.msg-text { font-size: .88rem; line-height: 1.5; word-break: break-word; }
.msg-time { font-size: .68rem; color: var(--text-dim); margin-top: 3px; }
.msg-out .msg-body { text-align: right; }

/* ── Plugin cards (dashboard) ── */
.plugin-installed-card { margin-bottom: 10px; padding: 16px; }
.plugin-installed-card:hover { border-color: var(--primary); box-shadow: 0 4px 16px rgba(79,70,229,.06); }
.plugin-installed-header { display: flex; align-items: center; gap: 12px; }
.plugin-installed-actions { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.plugin-install-item { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--border); }

/* ── Batch actions bar ── */
.batch-bar { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; padding: 10px 14px; background: var(--primary-light); border-radius: var(--radius-sm); border: 1px dashed rgba(79,70,229,.2); }

/* ── Plugin Store ── */
.plugin-store-hero {
  text-align: center; padding: 56px 24px 36px;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 100%);
}
.plugin-store-hero h1 { font-size: 1.8rem; margin-bottom: 10px; font-weight: 800; }
.plugin-store-hero h1 span { background: linear-gradient(135deg, var(--primary), #7c3aed); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.plugin-store-hero p { color: var(--text-muted); margin-bottom: 20px; }
.plugin-search-bar { max-width: 480px; margin: 0 auto; }
.plugin-search-bar input { padding: 12px 20px; font-size: 1rem; border-radius: 24px; background: #fff; box-shadow: var(--shadow); border: 1px solid var(--border); }
.plugin-store-container { max-width: 1100px; margin: 0 auto; padding: 0 24px 60px; }
.plugin-categories { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.plugin-cat-btn { padding: 7px 16px; border-radius: 20px; background: #fff; color: var(--text-muted); border: 1px solid var(--border); font-size: .82rem; transition: all var(--transition); }
.plugin-cat-btn:hover, .plugin-cat-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.plugin-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.plugin-card {
  background: #fff; border-radius: var(--radius); padding: 18px;
  border: 1px solid var(--border); display: flex; gap: 14px; cursor: pointer;
  transition: all var(--transition); box-shadow: var(--shadow);
}
.plugin-card:hover { transform: translateY(-2px); border-color: var(--primary); box-shadow: 0 8px 24px rgba(79,70,229,.08); }
.plugin-card-icon { font-size: 2.2rem; flex-shrink: 0; }
.plugin-card-body { flex: 1; min-width: 0; }
.plugin-card-name { font-weight: 700; font-size: .95rem; margin-bottom: 3px; }
.plugin-card-desc { font-size: .82rem; color: var(--text-muted); margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.plugin-card-meta { display: flex; gap: 10px; font-size: .72rem; color: var(--text-muted); }
.plugin-cat-tag { background: var(--primary-light); color: var(--primary); padding: 2px 8px; border-radius: 10px; font-size: .72rem; font-weight: 500; }

/* Plugin source tabs */
.plugin-source-tabs { display: flex; gap: 0; margin-bottom: 18px; border-bottom: 2px solid var(--border); }
.plugin-source-btn { padding: 9px 18px; background: transparent; color: var(--text-muted); border-bottom: 2px solid transparent; margin-bottom: -2px; font-size: .88rem; transition: all var(--transition); font-weight: 500; }
.plugin-source-btn:hover, .plugin-source-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .dashboard { grid-template-columns: 1fr; }
  .sidebar { display: none; position: fixed; left: 0; top: 53px; bottom: 0; z-index: 150; width: 240px; box-shadow: var(--shadow-lg); }
  .sidebar.sidebar-open { display: block; }
  .hero h1 { font-size: 1.6rem; }
  .nav { padding: 12px 16px; }
  .main-content { padding: 16px; }
  .grid-2 { grid-template-columns: 1fr; }
  .plugin-grid { grid-template-columns: 1fr; }
}