:root {
  --bg: #081826;
  --panel: rgba(10, 29, 45, 0.84);
  --panel-strong: rgba(8, 22, 35, 0.94);
  --line: rgba(150, 206, 234, 0.25);
  --line-strong: rgba(150, 206, 234, 0.45);
  --text: #ecf6ff;
  --muted: #9ec1d8;
  --brand: #2cb5e9;
  --brand-2: #f59e5b;
  --ok: #5ecf9a;
  --danger: #f66f66;
  --shadow: 0 20px 58px rgba(1, 10, 18, 0.4);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 9% 14%, rgba(44, 181, 233, 0.24) 0%, transparent 34%),
    radial-gradient(circle at 90% 8%, rgba(245, 158, 91, 0.16) 0%, transparent 35%),
    radial-gradient(circle at 82% 85%, rgba(94, 207, 154, 0.12) 0%, transparent 38%),
    linear-gradient(160deg, #0c2031 0%, #07121d 45%, #040a12 100%);
  padding: 20px;
}

a {
  color: #96e0ff;
}

.app-shell {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.topbar {
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  background:
    linear-gradient(145deg, rgba(11, 31, 48, 0.9) 0%, rgba(9, 25, 40, 0.92) 100%),
    radial-gradient(circle at 90% -40%, rgba(150, 206, 234, 0.2) 0%, transparent 55%);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.branding {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-badge {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  border: 1px solid rgba(150, 206, 234, 0.5);
  border-radius: 10px;
  background: rgba(7, 21, 33, 0.72);
}

.branding h1,
.branding p {
  margin: 0;
}

.branding h1 {
  font-size: 1rem;
  line-height: 1.1;
}

.branding p {
  color: var(--muted);
  font-size: 0.82rem;
}

.nav-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  border: 1px solid rgba(150, 206, 234, 0.35);
  border-radius: 999px;
  padding: 6px 10px;
  color: #dff2ff;
  font-size: 0.83rem;
  background: rgba(7, 18, 30, 0.62);
}

.hero {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(160deg, var(--panel) 0%, var(--panel-strong) 100%);
  padding: 18px;
  box-shadow: var(--shadow);
}

.hero h2 {
  margin: 0 0 10px;
  font-size: clamp(1.25rem, 2.5vw, 1.8rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.hero-actions {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.main-grid {
  display: grid;
  gap: 14px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(160deg, var(--panel) 0%, var(--panel-strong) 100%);
  box-shadow: var(--shadow);
  padding: 14px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.card ul,
.card ol {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
  color: #d8ebfa;
  line-height: 1.55;
}

.form-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid label,
.stack label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.86rem;
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(150, 206, 234, 0.3);
  border-radius: 10px;
  background: rgba(6, 16, 27, 0.82);
  color: #e8f4ff;
  padding: 10px;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.stack {
  display: grid;
  gap: 10px;
}

.actions {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}

.btn {
  border: 1px solid rgba(150, 206, 234, 0.4);
  border-radius: 10px;
  background: rgba(7, 18, 30, 0.78);
  color: #e7f4ff;
  padding: 9px 12px;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #2cb5e9 0%, #1f84c1 100%);
  color: #f5fcff;
  border-color: rgba(150, 206, 234, 0.65);
}

.btn-warm {
  background: linear-gradient(135deg, #f59e5b 0%, #db7a33 100%);
  color: #fff7f0;
  border-color: rgba(245, 158, 91, 0.7);
}

.muted {
  color: var(--muted);
}

.kv {
  display: grid;
  gap: 8px;
}

.kv-item {
  border: 1px solid rgba(150, 206, 234, 0.23);
  border-radius: 10px;
  padding: 8px 10px;
  background: rgba(8, 20, 33, 0.62);
}

.kv-item strong {
  display: block;
  margin-bottom: 4px;
  color: #eaf6ff;
  font-size: 0.9rem;
}

.kv-item span {
  color: var(--muted);
  font-size: 0.84rem;
}

.preview-stage {
  background: rgba(6, 16, 25, 0.82);
  border: 1px solid rgba(150, 206, 234, 0.3);
  border-radius: 14px;
  padding: 14px;
}

.card-canvas {
  width: min(100%, 520px);
  aspect-ratio: 3 / 4;
  margin: 0 auto;
  border-radius: 22px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  color: #fff;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.28);
}

.card-canvas h4 {
  margin: 0;
  font-size: 1.24rem;
  line-height: 1.32;
}

.card-canvas p {
  margin: 0;
  line-height: 1.58;
  white-space: pre-wrap;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  opacity: 0.92;
}

.template-a {
  background: linear-gradient(140deg, #155f8f 0%, #1d84b5 48%, #4ba8cf 100%);
}

.template-b {
  background: linear-gradient(145deg, #3a435f 0%, #181f37 45%, #0d1224 100%);
}

.template-c {
  background: linear-gradient(145deg, #204f3d 0%, #2f8568 48%, #60b48f 100%);
}

.template-d {
  background: linear-gradient(145deg, #744623 0%, #a96834 46%, #d39558 100%);
}

.template-e {
  background: linear-gradient(150deg, #5e2458 0%, #8b2d66 50%, #bf4b8a 100%);
}

.output-box {
  border: 1px solid rgba(150, 206, 234, 0.3);
  border-radius: 12px;
  background: rgba(6, 17, 27, 0.76);
  padding: 10px;
}

.output-box pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: #dff0ff;
  font-size: 0.9rem;
  line-height: 1.55;
}

.table-wrap {
  overflow: auto;
  border: 1px solid rgba(150, 206, 234, 0.28);
  border-radius: 12px;
}

.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

.table-wrap th,
.table-wrap td {
  border-bottom: 1px solid rgba(150, 206, 234, 0.2);
  padding: 9px 10px;
  text-align: left;
  font-size: 0.85rem;
  vertical-align: top;
}

.table-wrap th {
  color: #ecf6ff;
  background: rgba(10, 30, 47, 0.9);
}

.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(150, 206, 234, 0.42);
  border-radius: 999px;
  padding: 3px 9px;
  font-size: 0.75rem;
  color: #d8edff;
}

.footer {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 10px 12px;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
  background: rgba(7, 19, 31, 0.74);
}

@media (max-width: 980px) {
  .grid-2,
  .grid-3,
  .form-grid {
    grid-template-columns: 1fr;
  }

  body {
    padding: 14px;
  }

  .card-canvas {
    width: 100%;
  }
}