:root {
  --bg: #06090d;
  --bg-elevated: #0c1016;
  --bg-card: rgba(12, 16, 22, 0.72);
  --border: rgba(148, 163, 184, 0.12);
  --border-strong: rgba(148, 163, 184, 0.22);
  --text: #eef2f8;
  --muted: #8b9aaf;
  --accent: #3ee5c5;
  --accent-dim: rgba(62, 229, 197, 0.14);
  --accent-2: #9ca8ff;
  --accent-2-dim: rgba(156, 168, 255, 0.12);
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
  --font-sans: "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

::selection {
  background: rgba(62, 229, 197, 0.28);
  color: var(--text);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  position: relative;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 100% 80% at 50% -30%, rgba(62, 229, 197, 0.14), transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 10%, rgba(156, 168, 255, 0.1), transparent 50%),
    linear-gradient(180deg, #06090d 0%, #040608 100%);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.bg-grid {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 85% 70% at 50% 0%, black 20%, transparent 75%);
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(920px, 92vw);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.site-header {
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px) saturate(1.2);
  background: rgba(6, 9, 13, 0.82);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand:hover .brand-word {
  color: var(--accent);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(145deg, var(--accent) 0%, #1fa08a 45%, var(--accent-2) 100%);
  display: grid;
  place-items: center;
  font-size: 1.05rem;
  font-weight: 800;
  color: #041210;
  font-family: var(--font-sans);
  line-height: 1;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12) inset, 0 8px 20px rgba(62, 229, 197, 0.2);
}

.brand-word {
  font-size: 1.2rem;
  text-transform: lowercase;
  color: var(--text);
  transition: color 0.2s;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.nav-link {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(148, 163, 184, 0.1);
  text-decoration: none;
}

.nav-link--accent {
  color: #041210;
  background: linear-gradient(135deg, var(--accent), #2ec4a8);
  font-weight: 600;
}

.nav-link--accent:hover {
  color: #041210;
  filter: brightness(1.06);
  background: linear-gradient(135deg, var(--accent), #2ec4a8);
}

.main-inner {
  padding: 2.25rem 0 4.5rem;
}

.hero {
  padding: 0.5rem 0 2rem;
  max-width: 40rem;
}

.hero-eyebrow {
  margin: 0 0 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
}

.hero h1 {
  font-size: clamp(1.9rem, 4.8vw, 2.65rem);
  margin: 0 0 1rem;
  letter-spacing: -0.04em;
  line-height: 1.18;
  font-weight: 700;
}

.hero-gradient {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 38em;
  line-height: 1.7;
}

.hero .lead strong {
  color: #c5d0e2;
  font-weight: 600;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.35rem;
}

.pill {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--accent-dim);
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 2.25rem 0 1.1rem;
}

.section-title h2 {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-bar {
  width: 4px;
  height: 1.1em;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

.section-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}

.section-link:hover {
  color: var(--accent);
  border-color: rgba(62, 229, 197, 0.35);
  text-decoration: none;
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(272px, 1fr));
}

.card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem 1.35rem;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(62, 229, 197, 0.25), transparent 40%, rgba(156, 168, 255, 0.15));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}

.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

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

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.55rem;
}

.card .meta {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.card-arrow {
  font-size: 0.9rem;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s, transform 0.2s;
}

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

.card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.card h3 a {
  color: var(--text);
}

.card h3 a:hover {
  color: var(--accent);
  text-decoration: none;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.empty-hint {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 0.95rem;
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
  background: var(--accent-2-dim);
}

.empty-hint code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--accent);
}

.page-head {
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.page-head--compact {
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
}

.page-head h1 {
  margin: 0 0 0.45rem;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.page-desc {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.post-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
}

.post-row {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  border-bottom: 1px solid var(--border);
  color: inherit;
  text-decoration: none;
  transition: background 0.15s;
}

.post-row:last-child {
  border-bottom: none;
}

.post-row:hover {
  background: rgba(62, 229, 197, 0.05);
  text-decoration: none;
}

.post-row-main {
  min-width: 0;
  flex: 1;
}

.post-row h2 {
  margin: 0 0 0.35rem;
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  transition: color 0.15s;
}

.post-row:hover h2 {
  color: var(--accent);
}

.post-row-main p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-row-side {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.5rem;
  text-align: right;
}

.post-row-side time {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  white-space: nowrap;
}

.post-chevron {
  font-size: 1.1rem;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.2s, transform 0.2s;
}

.post-row:hover .post-chevron {
  opacity: 1;
  transform: translateX(0);
}

article.prose {
  max-width: 42rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 1.25rem;
  padding: 0.35rem 0.65rem 0.35rem 0;
  border-radius: 8px;
  text-decoration: none;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--accent);
  text-decoration: none;
}

article.prose h1 {
  font-size: clamp(1.55rem, 3.2vw, 2rem);
  margin: 0 0 0.5rem;
  letter-spacing: -0.03em;
  line-height: 1.2;
  font-weight: 700;
}

article.prose .meta {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

article.prose .content {
  color: #b8c4d6;
  font-size: 1.02rem;
}

article.prose .content h2 {
  margin-top: 2rem;
  font-size: 1.22rem;
  color: var(--text);
  font-weight: 650;
  letter-spacing: -0.02em;
}

article.prose .content h3 {
  margin-top: 1.5rem;
  font-size: 1.05rem;
  color: var(--text);
  font-weight: 600;
}

article.prose .content p {
  margin: 0.9rem 0;
}

article.prose .content ul,
article.prose .content ol {
  margin: 0.85rem 0;
  padding-left: 1.35rem;
}

article.prose .content li {
  margin: 0.4rem 0;
}

article.prose .content blockquote {
  margin: 1.15rem 0;
  padding: 0.65rem 1.1rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--accent-dim);
  color: var(--muted);
}

article.prose .content code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 0.12em 0.4em;
  border-radius: 6px;
  background: rgba(62, 229, 197, 0.12);
  color: #8ef0de;
}

article.prose .content pre {
  background: #050709;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.55;
}

article.prose .content pre code {
  background: none;
  padding: 0;
  color: #dce4ee;
}

.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 2rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.35rem 0.5rem;
}

.footer-brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-transform: lowercase;
}

.footer-dot {
  opacity: 0.45;
}

.flash {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
}

.flash li {
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  font-size: 0.92rem;
}

.flash .success {
  background: rgba(34, 197, 94, 0.12);
  color: #86efac;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.flash .danger {
  background: rgba(248, 113, 113, 0.1);
  color: #fca5a5;
  border: 1px solid rgba(248, 113, 113, 0.28);
}

.flash .warning {
  background: rgba(250, 204, 21, 0.08);
  color: #fde68a;
  border: 1px solid rgba(250, 204, 21, 0.28);
}

.form {
  max-width: 40rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.form input[type="text"],
.form input[type="password"],
.form textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-family: inherit;
  font-size: 0.98rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form textarea {
  min-height: 240px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.55;
}

.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: rgba(62, 229, 197, 0.45);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.btn {
  align-self: flex-start;
  margin-top: 0.25rem;
  padding: 0.72rem 1.4rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  background: linear-gradient(135deg, var(--accent), #24b89c);
  color: #041210;
  box-shadow: 0 4px 16px rgba(62, 229, 197, 0.25);
  transition: filter 0.15s, transform 0.1s;
}

.btn:hover {
  filter: brightness(1.07);
}

.btn:active {
  transform: scale(0.98);
}

.about-page .content {
  color: #b8c4d6;
  max-width: 42rem;
  font-size: 1.02rem;
}

.about-page .content p {
  margin: 0.9rem 0;
}

.about-page .content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.12em 0.4em;
  border-radius: 6px;
  background: rgba(156, 168, 255, 0.12);
  color: #c4ccff;
}

@media (max-width: 640px) {
  .site-header .inner {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .post-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .post-row-side {
    flex-direction: row;
    width: 100%;
    align-items: center;
    justify-content: space-between;
  }

  .post-chevron {
    opacity: 1;
    transform: none;
  }

  .card-arrow {
    opacity: 0.5;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}