/* ============================================================
   DESIGN SYSTEM v3 — Editorial Terminal
   A premium editorial experience built around the CLI identity.
   Warm amber accent. Cream typography. Noise + grid texture.
   ============================================================ */

:root {
  /* ---- Surface ---- */
  --bg:       #090909;
  --bg-alt:   #0F0F0F;
  --bg-card:  #131313;
  --bg-hover: #1A1A1A;
  --bg-input: #111111;

  /* ---- Ink ---- */
  --ink:      #F2EDE8;
  --ink-2:    #D0CBC5;
  --ink-3:    #9A9590;

  /* ---- Terminal palette ---- */
  --term-green:  #2DD4A8;
  --term-green-bg: rgba(45, 212, 168, 0.06);
  --term-green-glow: rgba(45, 212, 168, 0.25);
  --term-amber:  #F5A623;
  --term-amber-bg: rgba(245, 166, 35, 0.06);
  --term-amber-glow: rgba(245, 166, 35, 0.2);
  --term-red:    #EF4444;
  --term-blue:   #60A5FA;

  /* ---- Semantic ---- */
  --accent:   var(--term-amber);
  --accent-bg: var(--term-amber-bg);
  --accent-glow: var(--term-amber-glow);
  --success:  var(--term-green);
  --warning:  var(--term-amber);
  --error:    var(--term-red);

  /* ---- Type ---- */
  --ff-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', monospace;
  --ff-sans: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --ff-serif-cn: 'Noto Serif SC', 'Songti SC', 'STSong', serif;

  /* ---- Layout ---- */
  --nav-h: 52px;
  --gutter: clamp(20px, 5vw, 64px);
  --max-w: 1080px;
  --radius: 10px;

  /* ---- Easing ---- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--ff-sans);
  font-size: 16px;
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  cursor: none;
}
body * { cursor: none !important; }

::selection { background: var(--accent); color: var(--bg); }

/* ============================================================
   TEXTURE — noise + grid + vignette
   ============================================================ */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 10000;
}

/* Vignette */
body::after {
  content: '';
  position: fixed; inset: 0;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,0.4) 100%);
  pointer-events: none;
  z-index: 9999;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3 {
  font-family: var(--ff-sans);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--ink);
}
h1 { font-size: clamp(36px, 7.5vw, 88px); }
h2 { font-size: clamp(28px, 5vw, 52px); }
h3 { font-size: clamp(18px, 2.5vw, 22px); }

p { color: var(--ink-2); line-height: 1.9; }

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

code:not(.code-block code) {
  font-family: var(--ff-mono);
  font-size: 0.88em;
  background: var(--term-green-bg);
  color: var(--term-green);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: clamp(80px, 14vw, 180px) 0;
  position: relative;
}

.section + .section { border-top: 1px solid rgba(255,255,255,0.03); }

/* ============================================================
   PROGRESS BAR
   ============================================================ */
.progress {
  position: fixed; top: 0; left: 0;
  height: 2px;
  background: var(--accent);
  z-index: 200;
  width: 0%;
  transition: width 0.08s linear;
  box-shadow: 0 0 10px var(--accent-glow), 0 0 30px var(--accent-glow);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--gutter);
  background: rgba(9, 9, 9, 0.8);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.nav-logo {
  font-family: var(--ff-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-logo::before {
  content: '▸';
  color: var(--accent);
  font-size: 10px;
}

.nav-links { display: flex; gap: 2px; }

.nav-links a {
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-2);
  text-decoration: none;
  padding: 5px 12px;
  border-radius: 6px;
  transition: all 0.2s;
  letter-spacing: 0.01em;
}
.nav-links a:hover {
  color: var(--ink);
  background: rgba(255,255,255,0.04);
}
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-bg);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  font-family: var(--ff-mono);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  transition: all 0.25s var(--ease-out);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--accent);
  color: #1A1000;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 24px var(--accent-glow), 0 0 50px rgba(245, 166, 35, 0.08);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(255,255,255,0.12);
}
.btn-secondary:hover {
  color: var(--ink);
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.05);
}

.btn-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   TERMINAL WINDOW
   ============================================================ */
.terminal {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  background: rgba(255,255,255,0.015);
}
.terminal-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.terminal-dot.r { background: #FF5F56; }
.terminal-dot.y { background: #FFBD2E; }
.terminal-dot.g { background: #27C93F; }
.terminal-bar-title {
  flex: 1;
  text-align: center;
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--ink-3);
  opacity: 0.7;
}

.terminal-body {
  padding: 20px 24px;
  font-family: var(--ff-mono);
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-2);
  overflow-x: auto;
  min-height: 120px;
}

.t-prompt { color: var(--term-green); user-select: none; }
.t-prompt::before { content: '❯ '; opacity: 0.7; }
.t-file { color: var(--term-amber); }
.t-success { color: var(--term-green); }
.t-dim { color: var(--ink-3); }
.t-think { color: var(--ink-3); font-style: italic; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  padding: calc(var(--nav-h) + 40px) var(--gutter) 60px;
  overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
}
.hero-bg::before {
  content: '';
  position: absolute;
  top: -20%; left: 30%;
  width: 50%; height: 60%;
  background: radial-gradient(ellipse, rgba(245, 166, 35, 0.04) 0%, transparent 70%);
  filter: blur(80px);
  animation: drift 25s ease-in-out infinite;
}
.hero-bg::after {
  content: '';
  position: absolute;
  bottom: -10%; right: 20%;
  width: 40%; height: 50%;
  background: radial-gradient(ellipse, rgba(45, 212, 168, 0.03) 0%, transparent 70%);
  filter: blur(80px);
  animation: drift 30s ease-in-out infinite reverse;
}
@keyframes drift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -20px); }
}

.hero-content {
  position: relative; z-index: 1;
  text-align: center;
  max-width: 800px;
  width: 100%;
}

.hero-eyebrow {
  font-family: var(--ff-mono);
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 28px;
  letter-spacing: 0.15em;
  opacity: 0;
  animation: fadeUp 0.6s 0.2s var(--ease-out) forwards;
}

.hero h1 {
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 0.8s 0.4s var(--ease-out) forwards;
}

.hero-sub {
  font-family: var(--ff-serif-cn);
  font-weight: 300;
  font-size: clamp(16px, 2.2vw, 22px);
  color: var(--ink-2);
  line-height: 1.9;
  letter-spacing: 0.02em;
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeUp 0.8s 0.6s var(--ease-out) forwards;
}

.hero-rule {
  width: 1px; height: 48px;
  background: linear-gradient(180deg, var(--accent), transparent);
  margin: 0 auto 28px;
  opacity: 0;
  animation: fadeIn 0.8s 0.8s ease forwards;
}

.hero-cursor {
  display: inline-block;
  width: 2px; height: 0.9em;
  background: var(--accent);
  margin-left: 3px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

.scroll-hint {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--ff-mono);
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.2em;
  opacity: 0;
  animation: fadeIn 1s 2.5s ease forwards;
}
.scroll-hint::after {
  content: '';
  display: block;
  width: 1px; height: 28px;
  background: var(--ink-3);
  margin: 8px auto 0;
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%,100% { transform: scaleY(0.3); opacity: 0.2; }
  50% { transform: scaleY(1); opacity: 0.6; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { to { opacity: 1; } }

/* ============================================================
   SHOWCASE
   ============================================================ */
.showcase-item {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px var(--gutter);
  position: relative;
}
.showcase-item:nth-child(even) { background: var(--bg-alt); }

.showcase-inner {
  max-width: var(--max-w);
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.showcase-item:nth-child(even) .showcase-inner {
  grid-template-columns: 1.2fr 1fr;
}
.showcase-item:nth-child(even) .showcase-terminal-wrap { order: -1; }

.showcase-inner.in { opacity: 1; transform: translateY(0); }

.showcase-text { padding: 12px 0; }

.showcase-tag {
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  opacity: 0.7;
}

.showcase-title {
  font-family: var(--ff-serif-cn);
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 16px;
}

.showcase-desc {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 2;
  margin-bottom: 24px;
}

.showcase-prompt {
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--term-green);
  padding: 10px 14px;
  background: var(--term-green-bg);
  border-radius: 6px;
  border-left: 2px solid var(--term-green);
  line-height: 1.8;
}
.showcase-prompt::before { content: '❯ '; opacity: 0.7; }

.showcase-link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--term-amber);
  border: 1px solid rgba(245,166,35,0.3);
  padding: 8px 16px;
  border-radius: 6px;
  transition: all 0.2s;
  text-decoration: none;
}
.showcase-link:hover {
  background: rgba(245,166,35,0.08);
  border-color: var(--term-amber);
}

/* ---- Showcase Terminal Frame ---- */
.showcase-terminal-wrap {
  perspective: 1000px;
}

.showcase-terminal {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.02);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}
.showcase-terminal:hover {
  transform: translateY(-6px) rotateX(1deg);
  box-shadow: 0 30px 80px rgba(0,0,0,0.6), 0 0 40px var(--accent-glow);
}

.showcase-terminal .terminal-bar {
  padding: 8px 12px;
}
.showcase-terminal .terminal-dot { width: 8px; height: 8px; }
.showcase-terminal .terminal-bar-title { font-size: 10px; }

.showcase-terminal .terminal-body {
  padding: 0;
  min-height: auto;
}

.showcase-cmd {
  padding: 12px 16px;
  font-family: var(--ff-mono);
  font-size: 12px;
  color: var(--term-green);
  border-bottom: 1px solid rgba(255,255,255,0.03);
  background: rgba(255,255,255,0.01);
}
.showcase-cmd::before { content: '❯ '; opacity: 0.6; }

.showcase-img {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  position: relative;
}
.showcase-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1.2s var(--ease-out);
  display: block;
}
.showcase-terminal:hover .showcase-img img { transform: scale(1.04); }

.showcase-terminal .terminal-status {
  padding: 8px 16px;
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--term-green);
  opacity: 0.6;
  border-top: 1px solid rgba(255,255,255,0.03);
  background: rgba(255,255,255,0.01);
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-hd {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent);
  opacity: 0.6;
  margin-bottom: 14px;
}
.section-tag::before { content: '// '; opacity: 0.6; }

.section-title { margin-bottom: 12px; }

.section-desc {
  font-size: 16px;
  color: var(--ink-2);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.9;
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.prose {
  color: var(--ink-2);
  font-size: 15px;
  line-height: 2.1;
}
.prose p { margin-bottom: 18px; }

.hint-text {
  color: var(--ink-2);
  font-size: 12px;
  font-family: var(--ff-mono);
  margin-top: 6px;
  opacity: 0.8;
}

.pull-quote {
  font-family: var(--ff-serif-cn);
  font-size: clamp(17px, 2.5vw, 22px);
  font-weight: 300;
  color: var(--ink);
  line-height: 1.9;
  padding-left: 18px;
  border-left: 2px solid var(--accent);
  margin-top: 28px;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.3s, background 0.3s, transform 0.3s var(--ease-out);
}
.card:hover {
  border-color: rgba(245, 166, 35, 0.12);
  background: var(--bg-hover);
  transform: translateY(-2px);
}
.card h3 { font-size: 16px; margin-bottom: 6px; }
.card p  { font-size: 14px; line-height: 1.9; }

/* ============================================================
   STEPS (with timeline)
   ============================================================ */
.steps { position: relative; padding-left: 0; }

.step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  padding: 28px 0;
  position: relative;
}
.step + .step { border-top: 1px solid rgba(255,255,255,0.03); }

.step-num {
  width: 44px; height: 44px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  background: var(--bg);
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
.step:hover .step-num {
  box-shadow: 0 0 16px var(--accent-glow);
}

.step-body h3 { margin-bottom: 6px; }
.step-body p  { font-size: 14px; color: var(--ink-2); margin-bottom: 10px; line-height: 1.9; }
.step-body p:last-child { margin-bottom: 0; }

/* ============================================================
   TABS
   ============================================================ */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-card);
  padding: 3px;
  border-radius: 8px;
  margin-bottom: 28px;
  border: 1px solid rgba(255,255,255,0.04);
}
.tab {
  flex: 1;
  padding: 9px 20px;
  background: transparent;
  border: none;
  border-radius: 6px;
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-3);
  cursor: pointer;
  transition: all 0.2s;
}
.tab:hover { color: var(--ink-2); }
.tab.active {
  background: var(--bg-hover);
  color: var(--accent);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ============================================================
   CALLOUT
   ============================================================ */
.callout {
  background: var(--term-green-bg);
  border: 1px solid rgba(45, 212, 168, 0.1);
  border-radius: 8px;
  padding: 18px 20px;
  margin: 18px 0;
}
.callout-label {
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--term-green);
  margin-bottom: 4px;
  display: flex; align-items: center; gap: 5px;
}
.callout-label::before { content: '↳'; opacity: 0.6; }
.callout p { font-size: 14px; color: var(--ink-2); line-height: 1.9; }

.callout-warn {
  background: var(--term-amber-bg);
  border-color: rgba(245, 166, 35, 0.1);
}
.callout-warn .callout-label { color: var(--term-amber); }

/* ============================================================
   CODE BLOCKS
   ============================================================ */
.code-block {
  background: var(--bg-input);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 8px;
  padding: 16px 20px;
  font-family: var(--ff-mono);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-2);
  overflow-x: auto;
  position: relative;
}
.code-block code { color: var(--ink); }

.copy-btn {
  position: absolute;
  top: 8px; right: 8px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 5px;
  font-family: var(--ff-mono);
  font-size: 10px;
  color: var(--ink-3);
  cursor: pointer;
  transition: all 0.2s;
}
.copy-btn:hover {
  background: rgba(255,255,255,0.06);
  color: var(--ink-2);
}

/* ============================================================
   QUOTE
   ============================================================ */
.quote-block {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 0;
}
.quote-block blockquote {
  font-family: var(--ff-serif-cn);
  font-size: clamp(17px, 2.5vw, 26px);
  font-weight: 300;
  color: var(--ink-2);
  line-height: 1.9;
  margin-bottom: 20px;
  position: relative;
}
.quote-block blockquote::before {
  content: '"';
  position: absolute;
  top: -16px; left: -8px;
  font-size: 56px;
  color: var(--accent);
  opacity: 0.12;
  font-family: var(--ff-serif-cn);
  line-height: 1;
}
.quote-author {
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.12em;
}

/* ============================================================
   LAYER CARDS (usage.html)
   ============================================================ */
.layer-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s var(--ease-out);
}
.layer-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  opacity: 0.3;
}
.layer-card:hover {
  border-color: rgba(245, 166, 35, 0.12);
  transform: translateY(-2px);
}
.layer-num {
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--accent);
  opacity: 0.6;
  margin-bottom: 10px;
}
.layer-card h3 { font-size: 16px; margin-bottom: 8px; }
.layer-card p  { font-size: 13px; color: var(--ink-2); line-height: 1.9; }

/* ============================================================
   PYRAMID (usage.html — four-layer structure)
   Each layer is a trapezoid via clip-path on ::before.
   Number + name centered inside. Gaps between layers.
   ============================================================ */
.pyramid-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 64px;
  max-width: 960px;
  margin: 0 auto;
}

/* ---- Left: pyramid ---- */
.pyramid {
  flex-shrink: 0;
  width: 480px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.pyramid-layer {
  cursor: pointer;
  position: relative;
}

/* Bar container — transparent, just holds the centered text */
.pyramid-bar {
  width: 100%;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  position: relative;
  overflow: visible;
}

/* Trapezoid background — clipped pseudo-element */
.pyramid-bar::before {
  content: '';
  position: absolute;
  inset: 0;
  transition: background 0.3s, border-color 0.3s, filter 0.3s;
  z-index: -1;
}

/* Layer 1 — top, narrowest */
.pyramid-layer:nth-child(1) .pyramid-bar::before {
  background: rgba(245,166,35,0.12);
  border: 1px solid rgba(245,166,35,0.15);
  clip-path: polygon(30% 0%, 70% 0%, 78% 100%, 22% 100%);
}
/* Layer 2 */
.pyramid-layer:nth-child(2) .pyramid-bar::before {
  background: rgba(245,166,35,0.09);
  border: 1px solid rgba(245,166,35,0.12);
  clip-path: polygon(22% 0%, 78% 0%, 86% 100%, 14% 100%);
}
/* Layer 3 */
.pyramid-layer:nth-child(3) .pyramid-bar::before {
  background: rgba(245,166,35,0.06);
  border: 1px solid rgba(245,166,35,0.09);
  clip-path: polygon(14% 0%, 86% 0%, 94% 100%, 6% 100%);
}
/* Layer 4 — bottom, widest */
.pyramid-layer:nth-child(4) .pyramid-bar::before {
  background: rgba(245,166,35,0.04);
  border: 1px solid rgba(245,166,35,0.07);
  clip-path: polygon(6% 0%, 94% 0%, 100% 100%, 0% 100%);
}

/* Hover / active — brighten */
.pyramid-layer:hover .pyramid-bar::before,
.pyramid-layer.active .pyramid-bar::before {
  background: rgba(245,166,35,0.18);
  border-color: rgba(245,166,35,0.3);
  filter: brightness(1.15);
}

/* Number inside trapezoid */
.pyramid-num {
  font-family: var(--ff-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.7;
  transition: opacity 0.3s;
  min-width: 28px;
  text-align: center;
}
.pyramid-layer:hover .pyramid-num,
.pyramid-layer.active .pyramid-num {
  opacity: 1;
}

/* Name inside trapezoid */
.pyramid-name {
  font-family: var(--ff-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
  opacity: 0.85;
  transition: opacity 0.3s;
}
.pyramid-layer:hover .pyramid-name,
.pyramid-layer.active .pyramid-name {
  opacity: 1;
}

/* ---- Right: description panel ---- */
.pyramid-desc {
  flex: 1;
  min-width: 0;
  max-width: 360px;
}

.pyramid-desc-inner {
  position: relative;
  min-height: 160px;
}

.pyramid-hint {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-3);
  font-size: 14px;
  font-family: var(--ff-mono);
}

.pyramid-hint-icon {
  color: var(--accent);
  font-size: 12px;
  animation: blink 1.2s step-end infinite;
}

.pyramid-detail {
  display: none;
}

.pyramid-detail-tag {
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 10px;
}

.pyramid-detail-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.3;
}

/* ---- Right: description panel ---- */
.pyramid-desc {
  flex: 1;
  min-width: 0;
  max-width: 360px;
}

.pyramid-desc-inner {
  position: relative;
  min-height: 140px;
}

.pyramid-hint {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-3);
  font-size: 14px;
  font-family: var(--ff-mono);
}

.pyramid-hint-icon {
  color: var(--accent);
  font-size: 12px;
  animation: blink 1.2s step-end infinite;
}

.pyramid-detail {
  display: none;
}

.pyramid-detail-tag {
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 10px;
}

.pyramid-detail-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.3;
}

.pyramid-detail-text {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.9;
}

.pyramid-detail-text code {
  font-family: var(--ff-mono);
  font-size: 12px;
  background: rgba(45,212,168,0.08);
  color: var(--term-green);
  padding: 2px 7px;
  border-radius: 4px;
}

.pyramid-detail-solve {
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.8;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

/* ============================================================
   DECODE TEXT
   ============================================================ */
.decode {
  visibility: hidden;
}
.decode.decode-active {
  visibility: visible;
}
.decode.decode-active span {
  display: inline-block;
  transition: none;
}

/* ============================================================
   CONTENT IMAGE
   ============================================================ */
.content-img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.04);
  margin: 14px 0;
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  padding: 56px var(--gutter);
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.03);
}
.footer-mark {
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 12px;
  opacity: 0.6;
}
.footer-line {
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  line-height: 2;
}
.footer-line.en { font-style: italic; margin-top: 2px; }

/* ============================================================
   GRIDS
   ============================================================ */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }

/* ============================================================
   HERO TERMINAL SIMULATION
   ============================================================ */
.hero-terminal {
  max-width: 640px;
  margin: 48px auto 0;
  text-align: left;
  opacity: 0;
  animation: fadeUp 0.8s 1s var(--ease-out) forwards;
}
.hero-terminal .terminal-body {
  min-height: 160px;
  font-size: 12px;
}
.hero-terminal .t-line {
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s, transform 0.3s;
  margin-bottom: 2px;
}
.hero-terminal .t-line.show {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   HERO GRID BACKGROUND
   ============================================================ */
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(245,166,35,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,166,35,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  z-index: 0;
}

/* ============================================================
   STATS COUNTER
   ============================================================ */
.stats {
  padding: 64px 0;
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: var(--bg-alt);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
  align-items: start;
}
.stat-item {
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.stat-num {
  font-family: var(--ff-mono);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
  text-shadow: 0 0 20px rgba(245,166,35,0.3);
  min-height: 1.1em;
  display: flex;
  align-items: center;
  justify-content: center;
}
.stat-label {
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: 0.05em;
}

/* ============================================================
   SHOWCASE IMAGE FALLBACK
   ============================================================ */
.showcase-img {
  background:
    linear-gradient(135deg, rgba(245, 166, 35, 0.08) 0%, rgba(45, 212, 168, 0.06) 100%);
}
.showcase-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 1.2s var(--ease-out);
}
.showcase-img img[src=""] { display: none; }

/* ============================================================
   BUTTON RIPPLE
   ============================================================ */
.btn {
  position: relative;
  overflow: hidden;
}
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  transform: scale(0);
  animation: ripple-anim 0.6s ease-out;
  pointer-events: none;
}
@keyframes ripple-anim {
  to { transform: scale(4); opacity: 0; }
}

/* ============================================================
   PLAY FRAME (聊 / 玩)
   ============================================================ */
.play-frame {
  position: relative;
  padding: 56px 48px;
}

.play-char {
  font-family: var(--ff-serif-cn);
  font-weight: 700;
  font-size: clamp(72px, 11vw, 110px);
  color: var(--accent);
  line-height: 1;
  user-select: none;
  flex-shrink: 0;
}

.play-text {
  font-family: var(--ff-serif-cn);
  font-size: clamp(16px, 2.5vw, 20px);
  font-weight: 300;
  color: var(--ink);
  line-height: 1.9;
}

.play-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.play-row-top {
  margin-bottom: 56px;
}

.play-row-top .play-text {
  padding-top: 20px;
}

.play-row-bottom {
  justify-content: flex-end;
  text-align: right;
  margin-top: 56px;
}

.play-row-bottom .play-text {
  padding-top: 16px;
  text-align: right;
}

.play-body {
  padding: 0;
}

.play-body p {
  font-family: var(--ff-serif-cn);
  font-size: clamp(15px, 2.2vw, 18px);
  font-weight: 300;
  color: var(--ink-2);
  line-height: 1.9;
  margin-bottom: 16px;
}

/* Corner accents */
.play-corner {
  position: absolute;
  width: 32px;
  height: 32px;
}

.play-corner::before,
.play-corner::after {
  content: '';
  position: absolute;
  background: rgba(245,166,35,0.2);
}

.play-corner::before {
  width: 100%;
  height: 1px;
}

.play-corner::after {
  width: 1px;
  height: 100%;
}

.play-corner-tl { top: 0; left: 0; }
.play-corner-tl::before { top: 0; left: 0; }
.play-corner-tl::after { top: 0; left: 0; }

.play-corner-tr { top: 0; right: 0; }
.play-corner-tr::before { top: 0; right: 0; }
.play-corner-tr::after { top: 0; right: 0; }

.play-corner-bl { bottom: 0; left: 0; }
.play-corner-bl::before { bottom: 0; left: 0; }
.play-corner-bl::after { bottom: 0; left: 0; }

.play-corner-br { bottom: 0; right: 0; }
.play-corner-br::before { bottom: 0; right: 0; }
.play-corner-br::after { bottom: 0; right: 0; }

/* ============================================================
   ANALOGY CARD
   ============================================================ */
.analogy-card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid rgba(45,212,168,0.12);
  border-radius: var(--radius);
  overflow: hidden;
}

.analogy-visual {
  padding: 32px 32px 0;
}

.analogy-svg {
  width: 100%;
  height: auto;
}

.analogy-text {
  padding: 28px 32px 32px;
}

.analogy-text blockquote {
  font-family: var(--ff-serif-cn);
  font-size: clamp(15px, 2.2vw, 18px);
  font-weight: 300;
  color: var(--ink);
  line-height: 1.9;
  margin-bottom: 16px;
}

.analogy-text .quote-author {
  font-family: var(--ff-mono);
  font-size: 12px;
  color: var(--term-green);
  opacity: 0.7;
  line-height: 1.7;
}

/* ============================================================
   TEMPLATE SECTION
   ============================================================ */
.template-terminal {
  max-width: 680px;
  margin: 0 auto;
}

.template-copy-btn {
  margin-left: auto;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--ink-2);
  font-family: var(--ff-mono);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.template-copy-btn:hover {
  color: var(--ink);
  border-color: rgba(255,255,255,0.25);
}

.template-body {
  max-height: 220px;
  overflow: hidden;
  position: relative;
  transition: max-height 0.4s ease;
}
.template-body.expanded {
  max-height: 2000px;
}

.template-lines {
  font-family: var(--ff-mono);
  font-size: 12px;
  line-height: 1.9;
  padding: 16px 0;
}

.template-line {
  display: flex;
  padding: 0 20px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.template-line-num {
  width: 32px;
  flex-shrink: 0;
  color: rgba(255,255,255,0.15);
  text-align: right;
  padding-right: 16px;
  user-select: none;
}

.template-line-content {
  color: var(--ink-2);
}

.template-line.heading .template-line-content {
  color: var(--accent);
  font-weight: 500;
}

.template-line.empty {
  height: 1.9em;
}

.template-fade {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(transparent, var(--bg-card));
  pointer-events: none;
  transition: opacity 0.3s;
}
.template-body.expanded .template-fade {
  opacity: 0;
}

.template-expand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px;
  color: var(--ink-2);
  font-family: var(--ff-mono);
  font-size: 12px;
  cursor: pointer;
  transition: color 0.2s;
}
.template-expand:hover {
  color: var(--ink);
}
.template-expand-icon {
  transition: transform 0.3s;
  font-size: 10px;
}
.template-body.expanded ~ .template-expand .template-expand-icon {
  transform: rotate(180deg);
}

/* ============================================================
   GLOW CURSOR BALL
   ============================================================ */
.cursor-ball {
  position: fixed;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245,166,35,0.6) 0%, rgba(245,166,35,0.15) 50%, transparent 70%);
  box-shadow: 0 0 20px rgba(245,166,35,0.4), 0 0 40px rgba(245,166,35,0.15);
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: width 0.2s, height 0.2s, box-shadow 0.2s;
  will-change: left, top;
  mix-blend-mode: screen;
}
.cursor-ball.hover {
  width: 48px;
  height: 48px;
  box-shadow: 0 0 30px rgba(245,166,35,0.6), 0 0 60px rgba(245,166,35,0.25);
}

/* ============================================================
   SKILL-SPECIFIC (skills.html)
   ============================================================ */
.skill-subtitle {
  color: var(--accent);
  font-family: var(--ff-mono);
  font-size: 12px;
  margin-bottom: 8px;
}

.skill-list {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.8;
}

/* ============================================================
   SKILL CARD
   ============================================================ */
.skill-card {
  position: relative;
  transition: border-color 0.3s, transform 0.3s var(--ease-out);
}

.skill-card:hover {
  border-color: rgba(245, 166, 35, 0.2);
  transform: translateY(-3px);
}

.skill-icon {
  font-size: 32px;
  margin-bottom: 12px;
  filter: grayscale(0.2);
  transition: filter 0.3s;
}

.skill-card:hover .skill-icon {
  filter: grayscale(0);
}

.skill-card ul {
  list-style: none;
  padding: 0;
}

.skill-card ul li {
  padding-left: 16px;
  position: relative;
}

.skill-card ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  opacity: 0.6;
}

/* ============================================================
   BADGE
   ============================================================ */
.badge-recommended {
  font-size: 11px;
  font-family: var(--ff-mono);
  background: var(--term-green);
  color: #1A1000;
  padding: 2px 8px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 8px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  position: relative;
  top: -1px;
}

/* ============================================================
   SKILL SHOWCASE — full-width skill sections
   ============================================================ */
.skill-showcase {
  padding: clamp(80px, 14vw, 160px) 0;
}
.skill-showcase + .skill-showcase { border-top: 1px solid rgba(255,255,255,0.03); }

.skill-showcase-inner {
  max-width: var(--max-w);
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: start;
  padding-left: clamp(16px, 5vw, 64px);
}

.skill-showcase-text {
  position: relative;
}

.skill-char {
  font-family: var(--ff-serif-cn);
  font-weight: 700;
  font-size: clamp(72px, 11vw, 110px);
  color: var(--accent);
  line-height: 1;
  user-select: none;
  opacity: 0.85;
  margin-bottom: 8px;
}

.skill-showcase-meta {
  margin-left: clamp(32px, 6vw, 80px);
  margin-top: 16px;
}

.skill-showcase-title {
  font-family: var(--ff-mono);
  font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.skill-showcase-role {
  font-family: var(--ff-serif-cn);
  font-size: clamp(15px, 2vw, 18px);
  font-weight: 300;
  color: var(--accent);
  margin-bottom: 16px;
}

.skill-showcase-desc {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 2;
  margin-bottom: 16px;
}

.skill-showcase-list {
  list-style: none;
  padding: 0;
  margin-top: 4px;
}

.skill-showcase-list li {
  font-size: clamp(15px, 1.8vw, 17px);
  color: var(--ink-2);
  line-height: 2.1;
  padding-left: 18px;
  position: relative;
}

.skill-showcase-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  opacity: 0.6;
}

/* ---- Skill Install Terminal ---- */
.skill-showcase-terminal-wrap {
  perspective: 1000px;
  margin-top: clamp(88px, calc(11vw + 16px), 126px);
}

.skill-showcase-terminal-wrap .showcase-terminal {
  margin-bottom: 12px;
}

.showcase-terminal-success {
  padding: 10px 16px;
  border-top: 1px solid rgba(255,255,255,0.03);
  background: rgba(255,255,255,0.01);
  font-family: var(--ff-mono);
  font-size: 12px;
}

.skill-install-btn {
  display: block;
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: #1A1000;
  text-align: center;
  border: none;
  border-radius: 8px;
  font-family: var(--ff-mono);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  letter-spacing: 0.02em;
}

.skill-install-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 24px var(--accent-glow), 0 0 50px rgba(245, 166, 35, 0.08);
}

.skill-install-btn:active {
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  body, body * { cursor: auto !important; }
  .cursor-ball { display: none; }

  .nav-links { gap: 0; }
  .nav-links a { font-size: 10px; padding: 4px 7px; }

  .grid-2, .grid-3 { grid-template-columns: 1fr; }

  .showcase-inner,
  .showcase-item:nth-child(even) .showcase-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .showcase-item:nth-child(even) .showcase-terminal-wrap { order: 0; }

  .showcase-item {
    min-height: auto;
    padding: 60px var(--gutter);
  }

  .showcase-terminal {
    transform: none;
  }
  .showcase-terminal:hover {
    transform: none;
  }

  .step {
    grid-template-columns: 36px 1fr;
    gap: 14px;
    padding: 22px 0;
  }
  .step-num { width: 36px; height: 36px; font-size: 13px; }

  .btn-group { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 260px; justify-content: center; }

  .hero-terminal { max-width: 100%; }

  .section { padding: clamp(50px, 8vw, 80px) 0; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }

  .hero { padding-top: calc(var(--nav-h) + 24px); }

  .layer-card { padding: 20px; }

  .pyramid-wrap {
    flex-direction: column;
    gap: 32px;
  }
  .pyramid {
    width: 100%;
    max-width: 400px;
  }
  .pyramid-bar::before {
    clip-path: none !important;
    border-radius: 8px;
  }
  .pyramid-desc {
    max-width: 100%;
    width: 100%;
  }

  .template-line { padding: 0 12px; }
  .template-line-num { width: 26px; padding-right: 10px; font-size: 11px; }
  .template-line-content { font-size: 11px; }

  .analogy-visual { padding: 20px 16px 0; }
  .analogy-text { padding: 20px 16px 24px; }

  .play-frame { padding: 32px 20px; }
  .play-char { font-size: 60px !important; }
  .play-row { gap: 10px; }
  .play-text { font-size: 15px !important; }

  footer { padding: 40px var(--gutter); }

  .skill-showcase { padding: clamp(50px, 8vw, 80px) 0; }
  .skill-showcase-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .skill-showcase-text {
    /* block layout — no flex overrides needed */
  }
  .skill-char { font-size: clamp(60px, 15vw, 100px) !important; }
  .skill-showcase-meta { margin-left: 0; margin-top: -0.1em; }
}