/* === Reset & Terminal Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #020603;
  --bg-card: rgba(2, 18, 8, 0.86);
  --bg-card-hover: rgba(0, 42, 16, 0.88);
  --text: #8cff9b;
  --text-dim: #39c95a;
  --terminal-green: #36ff62;
  --terminal-green-soft: #10a83a;
  --terminal-cyan: #24f8ff;
  --terminal-amber: #ffad1f;
  --accent: var(--terminal-green);
  --accent-glow: #b6ffc0;
  --green: var(--terminal-green);
  --orange: var(--terminal-amber);
  --red: #ff5f63;
  --border: rgba(54, 255, 98, 0.54);
  --radius: 0;
  --shadow-green: 0 0 18px rgba(54, 255, 98, 0.34), inset 0 0 18px rgba(54, 255, 98, 0.08);
}

html { font-size: 16px; background: #000; }
body {
  background:
    linear-gradient(rgba(54, 255, 98, 0.035) 50%, rgba(0, 0, 0, 0.08) 50%),
    radial-gradient(circle at 50% 0%, rgba(54, 255, 98, 0.12), transparent 38%),
    var(--bg);
  background-size: 100% 4px, auto, auto;
  color: var(--text);
  display: flex;
  flex-direction: column;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", "Courier New", monospace;
  letter-spacing: 0;
  line-height: 1.6;
  min-height: 100vh;
  text-shadow: 0 0 8px rgba(54, 255, 98, 0.5);
}

body::before {
  content: "";
  inset: 0;
  pointer-events: none;
  position: fixed;
  z-index: 999;
  background: radial-gradient(circle at center, transparent 54%, rgba(0, 0, 0, 0.34) 100%);
}

.container { max-width: 1160px; margin: 0 auto; padding: 0 18px; }
.site-main .container:has(> .knowledge-layout) { max-width: 1240px; }
.site-main > .knowledge-layout,
.site-main > .container.knowledge-layout { max-width: 1240px; }

a { color: var(--accent-glow); text-decoration: none; }
a:hover { color: #fff; text-decoration: none; }

/* === Header === */
.site-header {
  background: rgba(0, 8, 3, 0.86);
  border: 1px dotted var(--border);
  box-shadow: var(--shadow-green);
  margin: 16px;
  padding: 18px 0;
  position: sticky;
  top: 12px;
  z-index: 100;
}
.site-header::after {
  content: "";
  border: 1px dotted rgba(54, 255, 98, 0.34);
  inset: 5px;
  pointer-events: none;
  position: absolute;
}
.site-header .container {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: space-between;
}
.site-logo {
  color: var(--accent-glow);
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  font-weight: 900;
  letter-spacing: 0.04em;
}
.site-logo:hover { color: #fff; text-shadow: 0 0 16px var(--terminal-green); }
.site-nav { display: flex; gap: clamp(16px, 4vw, 42px); flex-wrap: wrap; }
.site-nav a {
  color: var(--terminal-green);
  font-size: clamp(0.95rem, 2vw, 1.25rem);
  font-weight: 800;
  text-transform: uppercase;
}

/* === Main / Footer === */
.site-main { flex: 1; padding: 0 0 44px; }
.site-footer {
  border-top: 1px dotted var(--border);
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0 16px;
  padding: 18px 0 24px;
  text-align: center;
}

/* === Terminal Home === */
.crt-frame {
  border: 1px dotted var(--border);
  box-shadow: var(--shadow-green);
  position: relative;
}
.crt-frame::before {
  content: "";
  border: 1px dotted rgba(54, 255, 98, 0.24);
  inset: 6px;
  pointer-events: none;
  position: absolute;
}
.terminal-hero {
  margin: 12px 0 34px;
  min-height: 340px;
  padding: 28px 26px 36px;
  text-align: center;
}
.terminal-status {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  text-align: left;
  color: var(--terminal-green);
  font-size: 0.95rem;
}
.terminal-status > div { display: grid; gap: 4px; }
.terminal-online { text-align: right; }
.prompt-line,
.hero-command { color: var(--accent-glow); }
.terminal-badge {
  border: 1px dotted var(--border);
  color: var(--terminal-green);
  display: inline-block;
  font-size: 0.95rem;
  margin: 32px 0 16px;
  padding: 6px 14px;
}
.terminal-hero h1 {
  color: var(--accent-glow);
  font-size: clamp(2.6rem, 8vw, 5.6rem);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 18px;
  text-shadow: 0 0 18px rgba(54, 255, 98, 0.9), 3px 0 0 rgba(54, 255, 98, 0.16);
}
.terminal-hero p {
  color: var(--terminal-green);
  font-size: clamp(0.95rem, 2vw, 1.25rem);
}
.hero-command {
  font-size: 1rem;
  margin-top: 16px;
}
.terminal-cursor {
  animation: blink 1s steps(1) infinite;
  background: var(--terminal-green);
  box-shadow: 0 0 10px var(--terminal-green);
  display: inline-block;
  height: 1em;
  margin-left: 6px;
  transform: translateY(2px);
  width: 0.55em;
}
@keyframes blink { 50% { opacity: 0; } }

.space-grid,
.module-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  padding: 0 0 56px;
}
.terminal-window,
.space-card,
.card,
.post-item,
.post-nav,
.tool-area textarea,
.tool-area input,
.result-box,
.post-content pre,
.post-content .mermaid {
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: inset 0 0 16px rgba(54, 255, 98, 0.07);
}
.terminal-window {
  color: var(--text);
  display: block;
  min-height: 230px;
  padding: 0;
  position: relative;
  transition: border-color 0.18s, box-shadow 0.18s, transform 0.18s;
}
.terminal-window:hover {
  border-color: var(--accent-glow);
  box-shadow: var(--shadow-green);
  transform: translateY(-3px);
}
.terminal-window-bar {
  align-items: center;
  border-bottom: 1px dotted currentColor;
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  font-weight: 900;
}
.terminal-window-cyan { color: var(--terminal-cyan); border-color: rgba(36, 248, 255, 0.72); }
.terminal-window-green { color: var(--terminal-green); }
.terminal-window-amber { color: var(--terminal-amber); border-color: rgba(255, 173, 31, 0.72); }
.space-card .icon,
.terminal-ascii {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  margin: 28px 18px 14px;
}
.space-card h2,
.card h3 {
  color: var(--accent-glow);
  font-size: 1.45rem;
  margin: 0 18px 8px;
}
.space-card p,
.card p {
  color: currentColor;
  font-size: 0.95rem;
  margin: 0 18px 22px;
}

/* === Shared Page Sections === */
.page-header {
  border: 1px dotted var(--border);
  box-shadow: var(--shadow-green);
  margin-bottom: 28px;
  padding: 18px 20px;
}
.page-header h1 { color: var(--accent-glow); font-size: 2rem; }
.page-header h1::before { content: ">_ "; color: var(--terminal-green); }
.page-header p { color: var(--text-dim); margin-top: 6px; }

/* === Posts / Knowledge Layout === */
.knowledge-layout {
  align-items: start;
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
}
.post-browser { min-width: 0; }
.post-nav {
  max-height: calc(100vh - 136px);
  overflow: auto;
  padding: 16px;
  position: sticky;
  top: 112px;
}
.post-nav-title {
  color: var(--terminal-green);
  font-size: 0.82rem;
  font-weight: 900;
  margin-bottom: 10px;
  text-transform: uppercase;
}
.post-nav-title::before { content: "$ tree "; }
.post-nav-list { list-style: none; margin: 0; padding: 0; }
.post-nav-list .post-nav-list {
  border-left: 1px dotted var(--border);
  margin: 6px 0 6px 10px;
  padding-left: 10px;
}
.post-nav-folder summary {
  color: var(--accent-glow);
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 800;
  padding: 3px 0;
}
.post-nav-post a {
  color: var(--text-dim);
  display: block;
  font-size: 0.9rem;
  line-height: 1.35;
  padding: 5px 8px;
  word-break: break-word;
}
.post-nav-post a::before { content: "./"; color: var(--terminal-green-soft); }
.post-nav-post a:hover,
.post-nav-post.is-active a {
  background: rgba(54, 255, 98, 0.08);
  color: var(--accent-glow);
}
.post-nav-empty { color: var(--text-dim); font-size: 0.9rem; }
.post-list { display: flex; flex-direction: column; gap: 14px; }
.post-item {
  padding: 18px 20px;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.post-item:hover { border-color: var(--accent-glow); box-shadow: var(--shadow-green); }
.post-item h2 { font-size: 1.16rem; margin-bottom: 6px; }
.post-item h2 a { color: var(--accent-glow); }
.post-item h2 a::before { content: "cat "; color: var(--terminal-green); }
.post-meta { color: var(--text-dim); font-size: 0.85rem; }

/* === Post Content === */
.post-content { max-width: 820px; min-width: 0; }
.post-content h1 { color: var(--accent-glow); font-size: 2rem; margin-bottom: 8px; }
.post-content h1::before { content: "# "; color: var(--terminal-green); }
.post-content .post-meta { margin-bottom: 28px; }
.post-content h2 { color: var(--accent-glow); font-size: 1.35rem; margin: 32px 0 12px; }
.post-content h3 { color: var(--terminal-green); font-size: 1.12rem; margin: 24px 0 8px; }
.post-content h4 { font-size: 1rem; margin: 20px 0 8px; }
.post-content p { margin-bottom: 16px; }
.post-content ul, .post-content ol { margin: 0 0 16px 24px; }
.post-content li { margin-bottom: 6px; }
.post-content code {
  background: rgba(54, 255, 98, 0.09);
  border: 1px dotted rgba(54, 255, 98, 0.35);
  color: var(--accent-glow);
  padding: 1px 6px;
}
.post-content pre {
  margin-bottom: 16px;
  overflow-x: auto;
  padding: 16px 18px;
}
.post-content pre code { background: none; border: 0; padding: 0; }
.post-content blockquote {
  border-left: 3px solid var(--terminal-green);
  color: var(--text-dim);
  margin-bottom: 16px;
  padding-left: 16px;
}
.post-content img { border: 1px dotted var(--border); max-width: 100%; }
.post-content table {
  border-collapse: collapse;
  display: block;
  margin: 20px 0;
  max-width: 100%;
  overflow-x: auto;
  width: max-content;
}
.post-content th,
.post-content td {
  border: 1px dotted var(--border);
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
}
.post-content th { background: rgba(54, 255, 98, 0.08); color: var(--accent-glow); font-weight: 900; }
.post-content tr:nth-child(even) td { background: rgba(54, 255, 98, 0.035); }
.post-content .katex-display { overflow-x: auto; overflow-y: hidden; padding: 8px 0; }
.post-content .katex,
.post-content .katex * { text-shadow: none; }
.post-content .mermaid { margin: 20px 0; overflow-x: auto; padding: 16px; text-align: center; }
.post-content .mermaid,
.post-content .mermaid * { text-shadow: none; }

/* === Generic Cards / Buttons / Tools === */
.card-grid {
  align-items: stretch;
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.card {
  display: grid;
  grid-template-rows: 44px minmax(76px, auto) minmax(76px, 1fr) auto;
  min-height: 276px;
  padding: 28px;
  text-align: left;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.card:hover { border-color: var(--accent-glow); box-shadow: var(--shadow-green); }
.card .card-icon {
  align-items: center;
  color: var(--terminal-green);
  display: flex;
  font-size: 1.7rem;
  height: 44px;
  line-height: 1;
  margin: 0;
}
.card h3 {
  align-self: start;
  line-height: 1.35;
  margin: 0;
  min-height: 76px;
  padding-top: 10px;
}
.card p {
  align-self: start;
  line-height: 1.7;
  margin: 0;
  min-height: 76px;
}
.card .btn {
  justify-self: start;
  margin-top: 18px;
  min-width: 164px;
  text-align: center;
}
.btn {
  background: transparent;
  border: 1px dotted var(--border);
  color: var(--terminal-green);
  cursor: pointer;
  display: inline-block;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 800;
  padding: 7px 16px;
}
.btn::before { content: "./"; }
.btn:hover { background: rgba(54, 255, 98, 0.12); color: #fff; }
.btn-small { padding: 6px 14px; font-size: 0.85rem; }
.tool-container { max-width: 760px; }
.tool-container h1 { color: var(--accent-glow); margin-bottom: 24px; }
.tool-area { margin-bottom: 20px; }
.tool-area label { color: var(--terminal-green); display: block; font-size: 0.9rem; font-weight: 900; margin-bottom: 6px; }
.tool-area textarea,
.tool-area input {
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
  min-height: 46px;
  padding: 12px 14px;
  resize: vertical;
  width: 100%;
}
.tool-area textarea:focus,
.tool-area input:focus { border-color: var(--accent-glow); outline: none; box-shadow: var(--shadow-green); }
.tool-area textarea { min-height: 160px; }
.tool-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
.result-box {
  min-height: 60px;
  padding: 16px 18px;
  white-space: pre-wrap;
  word-break: break-all;
}
.error-msg { color: var(--red); font-size: 0.9rem; margin-top: 8px; }

/* === Legacy Game Helpers === */
.game-wrapper { align-items: center; display: flex; flex-direction: column; gap: 16px; }
.game-wrapper canvas { background: #000; border: 1px dotted var(--border); }
.game-info { align-items: center; display: flex; gap: 24px; }
.game-info span { font-size: 1rem; }
.game-back { margin-top: 8px; }

/* === Table === */
.info-table { border-collapse: collapse; margin: 16px 0; width: 100%; }
.info-table td,
.info-table th { border-bottom: 1px dotted var(--border); padding: 10px 14px; text-align: left; }
.info-table th { color: var(--text-dim); font-weight: 800; width: 120px; }

/* === Responsive === */
@media (max-width: 760px) {
  .site-header { margin: 10px; top: 8px; }
  .site-header .container { align-items: flex-start; flex-direction: column; }
  .site-nav { gap: 10px; }
  .terminal-status { flex-direction: column; }
  .terminal-online { text-align: left; }
  .terminal-hero { padding: 24px 16px 30px; }
  .space-grid,
  .card-grid { grid-template-columns: 1fr; }
  .knowledge-layout { grid-template-columns: 1fr; gap: 20px; }
  .post-nav { max-height: none; position: static; }
}