/* ===== PAC 在线生成器 · 高级视觉样式 ===== */
:root {
  --bg: #0b0d1a;
  --bg-soft: #12152b;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-strong: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.22);
  --text: #eef1ff;
  --text-dim: #a6abce;
  --text-faint: #6b7099;
  --accent: #7c8cff;
  --accent-2: #c779ff;
  --accent-3: #46e0c8;
  --danger: #ff6b81;
  --ok: #4ade80;
  --radius: 18px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.6);
  --glow: 0 0 0 1px var(--border), 0 10px 40px -12px rgba(124, 140, 255, 0.35);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}
html[data-theme="light"] {
  --bg: #eef1fb;
  --bg-soft: #ffffff;
  --surface: rgba(20, 24, 60, 0.04);
  --surface-strong: rgba(20, 24, 60, 0.07);
  --border: rgba(20, 24, 60, 0.12);
  --border-strong: rgba(20, 24, 60, 0.2);
  --text: #161a33;
  --text-dim: #4a4f73;
  --text-faint: #8288a8;
  --shadow: 0 20px 60px -24px rgba(40, 50, 120, 0.35);
  --glow: 0 0 0 1px var(--border), 0 10px 40px -14px rgba(124, 140, 255, 0.4);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 12% -8%, rgba(124, 140, 255, 0.18), transparent 60%),
    radial-gradient(1000px 700px at 105% 10%, rgba(199, 121, 255, 0.16), transparent 55%),
    radial-gradient(900px 600px at 50% 120%, rgba(70, 224, 200, 0.12), transparent 60%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 28px 20px 80px; }

/* ===== Header ===== */
header.top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-bottom: 28px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  width: 46px; height: 46px; border-radius: 14px; flex: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; font-size: 22px; font-weight: 800; color: #fff;
  box-shadow: var(--glow);
}
.brand h1 { font-size: 20px; margin: 0; letter-spacing: 0.2px; }
.brand p { margin: 0; font-size: 13px; color: var(--text-dim); }
.gradient-text {
  background: linear-gradient(100deg, var(--accent), var(--accent-2) 55%, var(--accent-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.theme-switch { display: flex; gap: 6px; padding: 5px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border); }
.theme-switch button {
  border: 0; background: transparent; color: var(--text-dim); cursor: pointer;
  padding: 7px 12px; border-radius: 999px; font-size: 13px; transition: all .25s var(--ease);
}
.theme-switch button.active { background: var(--surface-strong); color: var(--text); box-shadow: var(--glow); }

/* ===== Layout ===== */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 920px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; backdrop-filter: blur(20px) saturate(160%); -webkit-backdrop-filter: blur(20px) saturate(160%);
  box-shadow: var(--shadow); transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.card:hover { border-color: var(--border-strong); }
.card + .card { margin-top: 20px; }
.card h2 { font-size: 15px; margin: 0 0 4px; display: flex; align-items: center; gap: 8px; }
.card .hint { font-size: 12.5px; color: var(--text-faint); margin: 0 0 16px; }
.card h2 .tag { font-size: 11px; font-weight: 600; color: var(--accent-3);
  background: rgba(70, 224, 200, 0.12); padding: 2px 8px; border-radius: 999px; }

/* ===== Form ===== */
label.field { display: block; font-size: 13px; color: var(--text-dim); margin: 14px 0 6px; }
input, select, textarea {
  width: 100%; background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--border); border-radius: 12px; padding: 11px 13px;
  font-size: 14px; font-family: inherit; transition: border-color .2s, box-shadow .2s; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,140,255,.18); }
textarea { resize: vertical; min-height: 92px; line-height: 1.5; font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; font-size: 12.5px; }
select { appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path d='M2 4l4 4 4-4' stroke='%23a6abce' stroke-width='1.5' fill='none'/></svg>");
  background-repeat: no-repeat; background-position: right 12px center; padding-right: 32px; }

/* ===== Proxy rows ===== */
.proxy-row { display: grid; grid-template-columns: 96px 1fr 92px 34px; gap: 8px; align-items: center; margin-bottom: 8px; }
.proxy-row .rm { width: 34px; height: 34px; padding: 0; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text-dim); cursor: pointer; font-size: 16px; transition: all .2s; }
.proxy-row .rm:hover { color: var(--danger); border-color: var(--danger); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 7px; justify-content: center;
  border: 1px solid var(--border-strong); background: var(--surface-strong); color: var(--text);
  padding: 10px 16px; border-radius: 12px; font-size: 13.5px; font-weight: 600; cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .2s, border-color .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--glow); border-color: var(--accent); }
.btn:active { transform: translateY(0) scale(.98); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; color: #fff; }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.block { width: 100%; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

/* ===== Toggles ===== */
.toggle { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 11px 0; border-bottom: 1px dashed var(--border); }
.toggle:last-child { border-bottom: 0; }
.toggle .t-label { font-size: 13.5px; }
.toggle .t-desc { font-size: 11.5px; color: var(--text-faint); }
.switch { position: relative; width: 44px; height: 24px; flex: none; }
.switch input { display: none; }
.switch .track { position: absolute; inset: 0; background: var(--surface-strong); border: 1px solid var(--border);
  border-radius: 999px; transition: all .25s var(--ease); }
.switch .thumb { position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--text-dim); transition: all .25s var(--ease); }
.switch input:checked + .track { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; }
.switch input:checked + .track + .thumb { left: 23px; background: #fff; }

/* ===== Output ===== */
.preview-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.stats { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0; }
.stat { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 8px 14px; }
.stat .k { font-size: 11px; color: var(--text-faint); }
.stat .v { font-size: 16px; font-weight: 700; }
pre.code {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 14px; padding: 16px;
  max-height: 440px; overflow: auto; font-size: 12px; line-height: 1.55; margin: 0;
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; color: var(--text-dim); white-space: pre;
}
pre.code .kw { color: var(--accent-2); }
pre.code .str { color: var(--accent-3); }
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: 11px 20px; border-radius: 999px; font-size: 13px; font-weight: 600;
  opacity: 0; pointer-events: none; transition: all .35s var(--ease); box-shadow: var(--shadow); z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

details.usage { margin-top: 20px; }
details.usage summary { cursor: pointer; color: var(--text-dim); font-size: 13.5px; padding: 6px 0; }
details.usage ol { font-size: 13px; color: var(--text-dim); padding-left: 20px; }
details.usage code { background: var(--bg-soft); padding: 1px 6px; border-radius: 6px; font-size: 12px; color: var(--accent-3); }
details.token-help { margin: 12px 0 4px; border: 1px solid var(--line); border-radius: 12px; padding: 4px 14px; background: var(--bg-soft); }
details.token-help summary { cursor: pointer; color: var(--accent); font-size: 13px; padding: 8px 0; font-weight: 600; }
details.token-help .steps { font-size: 12.5px; color: var(--text-dim); padding-left: 20px; margin: 4px 0 10px; line-height: 1.7; }
details.token-help .steps code { background: var(--bg-soft); padding: 1px 5px; border-radius: 5px; font-size: 11.5px; color: var(--accent-3); }
details.token-help .warn { margin: 8px 0 12px; padding: 10px 12px; border-radius: 10px; font-size: 12px; color: var(--text-dim); background: rgba(245, 158, 11, 0.12); border: 1px solid rgba(245, 158, 11, 0.35); line-height: 1.65; }
details.token-help .warn b { color: var(--text); }
.link { color: var(--accent); text-decoration: none; }
.link:hover { text-decoration: underline; }
.foot { text-align: center; color: var(--text-faint); font-size: 12px; margin-top: 40px; }

/* ===== Quick add (常用工具) ===== */
.quick-add { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.qa-label { font-size: 12.5px; color: var(--text-faint); }
.chip {
  border: 1px solid var(--border-strong); background: var(--surface-strong); color: var(--text);
  padding: 6px 13px; border-radius: 999px; font-size: 12.5px; font-weight: 600; cursor: pointer;
  transition: transform .2s var(--ease), border-color .2s, background .2s;
}
.chip:hover { transform: translateY(-1px); border-color: var(--accent); box-shadow: var(--glow); }
.chip.ghost { background: transparent; color: var(--text-dim); }
.local-note { margin: 12px 0 4px; font-size: 12px; color: var(--text-dim); }
.local-note code { background: var(--bg-soft); padding: 1px 5px; border-radius: 5px; color: var(--accent-3); }
.local-note b { color: var(--accent-3); }

/* ===== Protocol help ===== */
.proto { border-top: 1px dashed var(--border); padding-top: 6px; }
.proto-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0; }
@media (max-width: 560px) { .proto-cards { grid-template-columns: 1fr; } }
.proto-card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.proto-card p { margin: 0; font-size: 12px; color: var(--text-dim); line-height: 1.55; }
.pc-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.pc-name { font-size: 14px; font-weight: 700; color: var(--text); }
.pc-head code { background: rgba(124,140,255,.14); color: var(--accent); padding: 1px 7px; border-radius: 6px; font-size: 11px; }
.proto-table { width: 100%; border-collapse: collapse; margin-top: 4px; font-size: 12px; }
.proto-table th, .proto-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.proto-table th { color: var(--text-faint); font-weight: 600; font-size: 11.5px; }
.proto-table td { color: var(--text-dim); }
.proto-table td code { background: var(--bg-soft); padding: 1px 6px; border-radius: 6px; color: var(--accent-3); font-size: 11.5px; }
.proto-table tbody tr:hover { background: var(--surface); }