:root {
  color-scheme: dark;
  --bg: #101522;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.14);
  --text: #f8fafc;
  --muted: #b9c5d6;
  --line: rgba(255, 255, 255, 0.16);
  --accent: #ff94bd;
  --cyan: #7ee7e0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 15% 0%, rgba(255,148,189,0.22), transparent 28rem),
    radial-gradient(circle at 85% 12%, rgba(126,231,224,0.16), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.65;
}

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

.blog-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  min-height: 72px;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
  background: rgba(16, 21, 34, 0.72);
  backdrop-filter: blur(18px);
}

.brand { font-weight: 900; }

nav {
  display: flex;
  gap: 1rem;
  color: var(--muted);
}

nav a:hover { color: var(--text); }

.blog-hero,
.toolbar,
.posts,
.admin-shell,
.article-shell {
  width: min(980px, calc(100% - 2rem));
  margin: 0 auto;
}

.blog-hero {
  padding: clamp(4rem, 9vw, 7rem) 0 2rem;
}

.blog-hero.compact { padding-bottom: 1rem; }

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 6.4rem);
  line-height: 0.98;
}

.blog-hero p:not(.eyebrow),
.muted,
.post-card p,
.article-meta {
  color: var(--muted);
}

.toolbar {
  display: flex;
  gap: 0.8rem;
  padding: 1rem 0 2rem;
}

input,
textarea,
button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
}

input,
textarea {
  width: 100%;
  padding: 0.78rem 0.9rem;
  outline: none;
}

input:focus,
textarea:focus {
  border-color: var(--cyan);
}

button {
  min-height: 2.9rem;
  padding: 0.7rem 1rem;
  cursor: pointer;
  font-weight: 900;
}

button:hover { background: var(--panel-strong); }

.posts {
  display: grid;
  gap: 1rem;
  padding-bottom: 5rem;
}

.post-card {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.post-card h2 {
  margin: 0.35rem 0 0.4rem;
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  line-height: 1.15;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.tags span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.admin-shell { padding-bottom: 5rem; }

.editor {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

label {
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
  font-weight: 800;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.article-shell {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.article {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.article h1 {
  max-width: 12ch;
  font-size: clamp(2.4rem, 7vw, 5rem);
}

.article-content {
  margin-top: 2rem;
}

.article-content h2 {
  margin-top: 2.2rem;
}

.article-content pre {
  overflow: auto;
  padding: 1rem;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.28);
}

.footer {
  padding: 2rem clamp(1rem, 4vw, 4rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 640px) {
  .blog-header { align-items: flex-start; flex-wrap: wrap; }
  nav { width: 100%; justify-content: space-between; }
  .toolbar { flex-direction: column; }
}