:root {
  --bg-1: #f4f7ff;
  --bg-2: #eef7f4;
  --ink: #121826;
  --muted: #5f6b7a;
  --panel: rgba(255, 255, 255, 0.9);
  --line: #d8dfeb;
  --brand: #0f62fe;
  --brand-2: #0c4fd1;
  --danger: #d92d20;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", "Helvetica Neue", sans-serif;
  background:
    radial-gradient(1000px 520px at 12% -12%, #d8e6ff 0%, transparent 60%),
    radial-gradient(900px 500px at 105% -8%, #d7f3e8 0%, transparent 60%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
}

.loading-mask {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(13, 18, 31, 0.36);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-mask.hidden {
  display: none;
}

.loading-card {
  border: 1px solid #d8dfeb;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 14px;
  padding: 14px 18px;
  min-width: 260px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 18px 36px rgba(15, 29, 55, 0.25);
}

.spinner {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid #d5def0;
  border-top-color: var(--brand);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero,
.panel,
.stats {
  width: min(1200px, calc(100% - 28px));
  margin: 14px auto;
}

.hero {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(245, 250, 255, 0.9));
  padding: 18px;
  box-shadow: 0 14px 35px rgba(16, 24, 40, 0.08);
}

h1 {
  margin: 0;
  font-size: clamp(30px, 4.2vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero p {
  margin: 8px 0;
  color: var(--muted);
}

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

button {
  border: 1px solid transparent;
  background: linear-gradient(145deg, var(--brand), var(--brand-2));
  color: #fff;
  border-radius: 12px;
  padding: 9px 14px;
  cursor: pointer;
  font-weight: 700;
}

button:hover { filter: brightness(1.04); }

button[data-action="delete"] {
  background: #fff;
  color: var(--danger);
  border-color: #f7c7c3;
}

button:disabled {
  background: #b8c2d3;
  color: #f8fafc;
  cursor: not-allowed;
}

#status {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
}

.stats article {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  backdrop-filter: blur(8px);
  padding: 12px;
}

.stats span {
  color: var(--muted);
  font-size: 12px;
}

.stats strong {
  display: block;
  font-size: 28px;
  margin-top: 4px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  backdrop-filter: blur(8px);
  padding: 12px;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.05);
}

.panel h2 {
  margin: 4px 0 10px;
  font-size: 20px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 12px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 12px;
  box-shadow: 0 4px 16px rgba(16, 24, 40, 0.04);
}

.meta {
  color: var(--muted);
  font-size: 12px;
}

h3 {
  margin: 8px 0;
  font-size: 20px;
  line-height: 1.3;
}

a {
  color: var(--ink);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

p {
  margin: 0 0 10px;
  color: #273245;
}

.tags {
  color: #0f62fe;
  font-size: 13px;
  font-weight: 600;
}

pre {
  margin: 8px 0;
  white-space: pre-wrap;
  border: 1px solid #dce3ef;
  border-radius: 12px;
  background: #f7f9fd;
  color: #1f2a3d;
  padding: 10px;
  font-size: 13px;
  line-height: 1.5;
}

.img-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 8px 0 10px;
}

img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #dce3ef;
}

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

textarea {
  width: 100%;
  min-height: 240px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  padding: 10px;
  font-family: "JetBrains Mono", monospace;
  line-height: 1.45;
}

@media (max-width: 760px) {
  button { flex: 1; }
  .img-grid { grid-template-columns: 1fr; }
}