:root {
  --bg: #f4f6fb;
  --fg: #1b2230;
  --muted: #6b7280;
  --accent: #4f7cff;
  --accent-2: #7aa2ff;
  --card: #ffffff;
  --border: #e8ecf4;
  --shadow: 0 6px 20px rgba(27, 34, 48, 0.06);
  --shadow-hover: 0 14px 32px rgba(79, 124, 255, 0.18);
  --radius: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

[hidden] { display: none !important; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 17px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 14px rgba(79, 124, 255, 0.35);
}

.search-box {
  flex: 1;
  position: relative;
  max-width: 420px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  fill: var(--muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 10px 14px 10px 38px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  font-size: 14px;
  color: var(--fg);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.15);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 16px rgba(79, 124, 255, 0.32);
  transition: transform 0.15s, box-shadow 0.2s;
  flex-shrink: 0;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(79, 124, 255, 0.4);
}

.btn-primary .plus { font-size: 16px; line-height: 1; }

.btn-ghost {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--muted);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.btn-ghost:hover { color: var(--accent); border-color: var(--accent-2); }

/* ---------- Tabs ---------- */

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 28px 24px 56px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.18s ease;
}

.tab:hover { color: var(--accent); border-color: var(--accent-2); }

.tab.is-active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 16px rgba(79, 124, 255, 0.3);
}

.tab-count {
  font-size: 12px;
  opacity: 0.7;
}

/* ---------- Groups & Cards ---------- */

.group { margin-bottom: 34px; }

.group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  margin: 0 0 14px;
}

.group-icon {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: #eef2ff;
  font-size: 15px;
}

.group-count {
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  min-height: 118px;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.18s ease;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card:hover::after { opacity: 1; }

.card-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-icon {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: #f1f4fb;
  object-fit: contain;
  flex-shrink: 0;
}

.card-title {
  font-weight: 600;
  font-size: 15px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-desc {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-link {
  font-size: 12px;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.18s, transform 0.18s;
}

.card:hover .card-link { opacity: 1; transform: translateX(0); }

.card-del {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 22px;
  height: 22px;
  border: none;
  border-radius: 50%;
  background: #f1f4fb;
  color: var(--muted);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.18s, background 0.18s, color 0.18s;
}

.card:hover .card-del { opacity: 1; }
.card-del:hover { background: #fee2e2; color: #dc2626; }

.empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 0;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1160px;
  margin: 0 auto;
  padding: 18px 24px 32px;
  color: var(--muted);
  font-size: 13px;
}

/* ---------- Modal ---------- */

.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(20, 26, 40, 0.45);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  z-index: 50;
  padding: 20px;
}

.modal {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(20, 26, 40, 0.28);
  overflow: hidden;
  animation: pop 0.18s ease;
}

@keyframes pop {
  from { transform: translateY(10px) scale(0.98); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-head h2 { margin: 0; font-size: 16px; }

.modal-close {
  border: none;
  background: transparent;
  font-size: 22px;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
}

.modal-body { padding: 18px 20px 20px; display: grid; gap: 14px; }

.field { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.field em { color: #dc2626; font-style: normal; }

.field input,
.field select {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--fg);
  background: #fff;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input:focus,
.field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.15);
}

.form-error {
  margin: 0;
  color: #dc2626;
  font-size: 13px;
}

.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 4px;
}

@media (max-width: 720px) {
  .header-inner { flex-wrap: wrap; }
  .search-box { order: 3; max-width: none; flex-basis: 100%; }
  .cards { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .site-footer { flex-direction: column; gap: 12px; }
}