/* ===========================================================
   VibeGuard — guardvibe.codes
   A dark, developer-native landing page.
   =========================================================== */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
pre, code { font-family: var(--font-mono); }
pre { margin: 0; }

/* ---------- design tokens ---------- */
:root {
  /* surface */
  --bg:           #07080c;
  --bg-raised:    #0b0d14;
  --bg-card:      rgba(255, 255, 255, 0.025);
  --bg-card-hi:   rgba(255, 255, 255, 0.045);
  --border:       rgba(255, 255, 255, 0.07);
  --border-hi:    rgba(255, 255, 255, 0.14);

  /* text */
  --fg:           #e6e8ef;
  --fg-soft:      #c4c8d6;
  --fg-dim:       #8a8fa3;
  --fg-dimmer:    #565b72;

  /* accents — the vibe palette */
  --v1:           #7c5cff; /* violet */
  --v2:           #00d4ff; /* cyan   */
  --v3:           #ff4ecd; /* pink   */
  --v1-soft:      rgba(124, 92, 255, 0.22);
  --v2-soft:      rgba(  0, 212, 255, 0.22);
  --v3-soft:      rgba(255,  78, 205, 0.22);

  /* semantic */
  --ok:           #6bff9d;
  --ok-soft:      rgba(107, 255, 157, 0.12);
  --warn:         #ffcb6b;
  --warn-soft:    rgba(255, 203, 107, 0.12);
  --bad:          #ff6b7d;
  --bad-soft:     rgba(255, 107, 125, 0.12);

  /* code token colors */
  --t-key:        #c792ea;
  --t-type:       #ffcb6b;
  --t-fn:         #82aaff;
  --t-str:        #c3e88d;
  --t-num:        #f78c6c;
  --t-cmt:        #546e7a;

  /* type */
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', ui-monospace, Menlo, Consolas, monospace;

  /* layout */
  --max-w:        1200px;
  --nav-h:        72px;
  --radius:       16px;
  --radius-sm:    10px;

  /* motion */
  --ease:         cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- base ---------- */
html, body {
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  letter-spacing: -0.005em;
}

::selection {
  background: var(--v1-soft);
  color: #fff;
}

/* shared inline code */
:not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.12em 0.4em;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--v2);
}

/* ===========================================================
   atmospheric layers
   =========================================================== */

/* animated mesh-gradient blobs */
.mesh {
  position: fixed;
  inset: -20%;
  z-index: -5;
  pointer-events: none;
  overflow: hidden;
  filter: blur(120px) saturate(120%);
  will-change: transform;
  transform: translate3d(0,0,0);
}
.mesh__blob {
  position: absolute;
  width: 55vmax;
  height: 55vmax;
  border-radius: 50%;
  opacity: 0.55;
  mix-blend-mode: screen;
  animation: blob 28s var(--ease) infinite alternate;
  will-change: transform, opacity;
}
.mesh__blob--1 { top: -10%; left: -10%; background: radial-gradient(circle, #7c5cff 0%, transparent 60%); animation-delay: 0s; }
.mesh__blob--2 { top: -20%; right: -10%; background: radial-gradient(circle, #00d4ff 0%, transparent 60%); animation-delay: -7s; }
.mesh__blob--3 { bottom: -25%; left: 10%; background: radial-gradient(circle, #ff4ecd 0%, transparent 60%); animation-delay: -14s; opacity: 0.45; }
.mesh__blob--4 { bottom: -10%; right: -5%;  background: radial-gradient(circle, #3a3dff 0%, transparent 60%); animation-delay: -21s; opacity: 0.45; }

@keyframes blob {
  0%   { transform: translate3d(0,0,0)    scale(1)   rotate(0deg); }
  50%  { transform: translate3d(8%,-6%,0) scale(1.12) rotate(80deg); }
  100% { transform: translate3d(-6%,8%,0) scale(0.95) rotate(160deg); }
}

/* faint grid lines */
.grid-lines {
  position: fixed;
  inset: 0;
  z-index: -4;
  pointer-events: none;
  background-image:
    linear-gradient(to right,  rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
}

/* film grain / noise */
.noise {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: 0.22;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='matrix' values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.7 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* cursor glow — giant blurred circle following pointer */
.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 520px; height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,92,255,0.25) 0%, rgba(0,212,255,0.08) 40%, transparent 70%);
  transform: translate3d(-9999px, -9999px, 0);
  pointer-events: none;
  z-index: -3;
  mix-blend-mode: screen;
  transition: opacity 400ms var(--ease);
  will-change: transform;
}
@media (hover: none) { .cursor-glow { display: none; } }

/* ===========================================================
   nav
   =========================================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(16px, 4vw, 40px);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: linear-gradient(to bottom, rgba(7,8,12,0.8), rgba(7,8,12,0.35));
  border-bottom: 1px solid var(--border);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.nav__mark { width: 28px; height: 28px; flex-shrink: 0; }
.nav__name { font-size: 17px; }
.nav__version {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dim);
  background: var(--bg-card);
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin-left: 4px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 32px);
  font-size: 14px;
}
.nav__links a {
  color: var(--fg-dim);
  transition: color 200ms var(--ease);
  position: relative;
}
.nav__links a:not(.nav__github):hover { color: var(--fg); }
.nav__links a:not(.nav__github)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--v1), var(--v2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 300ms var(--ease);
}
.nav__links a:not(.nav__github):hover::after { transform: scaleX(1); }

.nav__github {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--fg);
  transition: all 200ms var(--ease);
}
.nav__github:hover {
  background: var(--bg-card-hi);
  border-color: var(--border-hi);
  transform: translateY(-1px);
}

@media (max-width: 720px) {
  .nav__links a:not(.nav__github) { display: none; }
  .nav__version { display: none; }
}

/* ===========================================================
   shared
   =========================================================== */
main { padding-top: var(--nav-h); }

.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(72px, 12vw, 140px) clamp(20px, 4vw, 40px);
}

.section__head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto clamp(48px, 7vw, 80px);
}
.section__head--tight { margin-top: clamp(64px, 9vw, 96px); }

.section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--v2);
  background: var(--v2-soft);
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--v2-soft);
  margin-bottom: 22px;
}

.section__title {
  font-size: clamp(30px, 4.2vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 800;
  margin: 0 0 18px;
}
.section__title em {
  font-style: italic;
  background: linear-gradient(90deg, var(--v1), var(--v2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section__lead {
  font-size: clamp(15px, 1.4vw, 17.5px);
  line-height: 1.65;
  color: var(--fg-soft);
  margin: 0;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 14.5px;
  padding: 14px 22px;
  border-radius: 12px;
  transition: transform 200ms var(--ease), background 200ms var(--ease), box-shadow 300ms var(--ease), border-color 200ms var(--ease);
  will-change: transform;
  white-space: nowrap;
}
.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--v1), var(--v2) 60%, var(--v3));
  background-size: 200% 200%;
  background-position: 0% 50%;
  box-shadow:
    0 10px 30px -10px rgba(124, 92, 255, 0.55),
    0 0 0 1px rgba(255,255,255,0.08) inset;
}
.btn--primary:hover {
  background-position: 100% 50%;
  box-shadow:
    0 14px 40px -8px rgba(124, 92, 255, 0.75),
    0 0 0 1px rgba(255,255,255,0.14) inset;
}
.btn--ghost {
  color: var(--fg);
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  background: var(--bg-card-hi);
  border-color: var(--border-hi);
}

/* ---------- install button: arrow → shield swap on hover ---------- */
.btn--swap .btn__icons {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  overflow: visible;
}
.btn__icon {
  grid-area: 1 / 1;
  transition: transform 420ms var(--ease-out), opacity 300ms var(--ease-out);
}
.btn__icon--arrow {
  transform: translate3d(0, 0, 0);
  opacity: 1;
}
.btn__icon--shield {
  transform: translate3d(-130%, 0, 0) rotate(-8deg);
  opacity: 0;
}
.btn--swap:hover .btn__icon--arrow {
  transform: translate3d(130%, 0, 0);
  opacity: 0;
}
.btn--swap:hover .btn__icon--shield {
  transform: translate3d(0, 0, 0) rotate(0);
  opacity: 1;
  /* subtle gentle bob once the shield is in place */
  animation: shield-bob 1.6s var(--ease) 420ms infinite;
}
@keyframes shield-bob {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0); }
  50%      { transform: translate3d(0, -1.5px, 0) rotate(0); }
}

/* ===========================================================
   hero
   =========================================================== */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(56px, 10vw, 120px) clamp(20px, 4vw, 40px) clamp(40px, 8vw, 80px);
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - var(--nav-h));
}
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--fg-soft);
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  margin-bottom: 28px;
}
.hero__badge strong { color: var(--v2); font-weight: 600; }
.hero__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 12px var(--ok);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1;   transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.85); }
}

.hero__title {
  font-size: clamp(38px, 6vw, 76px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  margin: 0 0 26px;
}
.hero__line { display: block; overflow: hidden; padding-bottom: 0.08em; }
.hero__word {
  display: inline-block;
  opacity: 0;
  transform: translateY(110%);
  transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out);
}
.hero__word--accent {
  background: linear-gradient(90deg, var(--v1), var(--v2), var(--v3));
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradient-shift 6s ease-in-out infinite;
}
@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}
.is-loaded .hero__word { opacity: 1; transform: translateY(0); }

.hero__sub {
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.65;
  color: var(--fg-soft);
  max-width: 560px;
  margin: 0 0 32px;
}
.hero__sub strong { color: var(--fg); font-weight: 600; }

.hero__cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--fg-dim);
  flex-wrap: wrap;
}
.hero__meta-sep {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--fg-dimmer);
}

/* ---------- terminal ---------- */
.terminal {
  background: linear-gradient(180deg, rgba(11,13,20,0.85), rgba(7,8,12,0.9));
  border: 1px solid var(--border-hi);
  border-radius: var(--radius);
  box-shadow:
    0 40px 80px -30px rgba(0,0,0,0.6),
    0 0 0 1px rgba(124, 92, 255, 0.12),
    0 0 80px -20px rgba(124, 92, 255, 0.25);
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transform: translate3d(0,0,0);
  position: relative;
}
.terminal::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(124,92,255,0.5), transparent 40%, transparent 60%, rgba(0,212,255,0.4));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.terminal__light {
  width: 12px; height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.terminal__light--r { background: #ff5f57; }
.terminal__light--y { background: #febc2e; }
.terminal__light--g { background: #28c840; }
.terminal__title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
  margin-left: 8px;
}
.terminal__icon { color: var(--v2); }

.terminal__body {
  padding: 22px 22px 26px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--fg-soft);
  min-height: 420px;
  max-height: 480px;
  overflow: hidden;
  white-space: pre-wrap;
  word-break: break-word;
}
.terminal__body .tprompt { color: var(--v1); }
.terminal__body .tuser   { color: var(--fg); }
.terminal__body .tsys    { color: var(--fg-dim); }
.terminal__body .tok     { color: var(--ok); }
.terminal__body .tkey    { color: var(--v2); }
.terminal__body .tstr    { color: var(--t-str); }
.terminal__body .tcmt    { color: var(--t-cmt); font-style: italic; }
.terminal__body .tarrow  { color: var(--v3); }
.terminal__body .tmodel  { color: var(--fg); }
.terminal__caret {
  display: inline-block;
  width: 8px; height: 14px;
  background: var(--v2);
  margin-left: 2px;
  vertical-align: -2px;
  animation: caret 1s steps(1) infinite;
}
@keyframes caret { 50% { opacity: 0; } }

/* ===========================================================
   problem section — compare
   =========================================================== */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 860px) { .compare { grid-template-columns: 1fr; } }

.compare__col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
  transition: transform 400ms var(--ease-out), border-color 400ms var(--ease-out);
}
.compare__col:hover { transform: translateY(-3px); border-color: var(--border-hi); }
.compare__col::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  opacity: 0.5;
}
.compare__col--bad::before  { background: linear-gradient(135deg, rgba(255,107,125,0.5), transparent 60%); }
.compare__col--good::before { background: linear-gradient(135deg, rgba(107,255,157,0.5), transparent 60%); }

.compare__head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
  margin-bottom: 16px;
}
.compare__icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 13px;
  font-weight: 700;
}
.compare__icon--bad  { background: var(--bad-soft); color: var(--bad); }
.compare__icon--good { background: var(--ok-soft);  color: var(--ok); }

.compare__issues {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.compare__issues li {
  font-size: 13.5px;
  color: var(--fg-soft);
  line-height: 1.55;
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.compare__tag {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 2px 8px;
  border-radius: 4px;
}
.compare__tag--bad  { background: var(--bad-soft);  color: var(--bad); }
.compare__tag--warn { background: var(--warn-soft); color: var(--warn); }
.compare__tag--good { background: var(--ok-soft);   color: var(--ok); }

/* ---------- pre-generation timeline ---------- */
.pregen__timeline {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
  padding-left: 32px;
}
.pregen__line {
  position: absolute;
  left: 7px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--ok), var(--fg-dimmer) 40%, var(--fg-dimmer));
  border-radius: 1px;
}

.pregen__moment {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0;
  padding-bottom: 36px;
}
.pregen__moment:last-child { padding-bottom: 0; }

.pregen__dot {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid var(--bg);
  flex-shrink: 0;
  z-index: 1;
}
.pregen__dot--vg   { background: var(--ok);  box-shadow: 0 0 14px var(--ok-soft), 0 0 4px var(--ok); }
.pregen__dot--gen  { background: var(--fg-dim); }
.pregen__dot--rest { background: var(--fg-dimmer); }

.pregen__card {
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  position: relative;
  overflow: hidden;
}
.pregen__card::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: var(--radius);
  opacity: 0.3;
  pointer-events: none;
}
.pregen__moment--vg .pregen__card::before {
  background: linear-gradient(135deg, rgba(107,255,157,0.45), transparent 60%);
}
.pregen__card--dim {
  opacity: 0.65;
}
.pregen__card--dim:hover {
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.pregen__when {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 8px;
}
.pregen__moment--vg   .pregen__when { color: var(--ok); }
.pregen__moment--gen  .pregen__when { color: var(--fg-soft); }
.pregen__moment--rest .pregen__when { color: var(--fg-dim); }

.pregen__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--fg-soft);
}

.pregen__thesis {
  max-width: 640px;
  margin: 44px auto 0;
  text-align: center;
  color: var(--fg-soft);
  font-size: 15.5px;
  line-height: 1.7;
}

@media (max-width: 700px) {
  .pregen__timeline { padding-left: 28px; }
  .pregen__dot { left: -28px; width: 14px; height: 14px; }
  .pregen__line { left: 6px; }
}

/* ---------- generic code block ---------- */
.code {
  background: rgba(0,0,0,0.45);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--fg-soft);
  overflow-x: auto;
  position: relative;
}
.code code { white-space: pre; }
.code .c--k   { color: var(--t-key); font-weight: 500; }
.code .c--t   { color: var(--t-type); }
.code .c--f   { color: var(--t-fn); }
.code .c--s   { color: var(--t-str); }
.code .c--n   { color: var(--t-num); }
.code .c--cmt { color: var(--t-cmt); font-style: italic; }

/* ===========================================================
   how it works — flow + tools
   =========================================================== */
.flow {
  margin-bottom: clamp(48px, 8vw, 88px);
  padding: clamp(24px, 4vw, 40px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.flow__track {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1.2fr 0.8fr 1.2fr 0.8fr 1.2fr;
  align-items: center;
  gap: 12px;
}
@media (max-width: 960px) {
  .flow__track { grid-template-columns: 1fr; }
  .flow__link { display: none; }
}

.flow__node {
  text-align: center;
  padding: 22px 16px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: transform 300ms var(--ease), border-color 300ms var(--ease), box-shadow 300ms var(--ease);
}
.flow__node:hover {
  transform: translateY(-3px);
  border-color: var(--border-hi);
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.5);
}
.flow__node--alt { background: linear-gradient(180deg, rgba(124,92,255,0.08), rgba(0,212,255,0.04)); }

.flow__icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  display: grid; place-items: center;
  margin: 0 auto 12px;
  color: var(--v2);
}
.flow__node--alt .flow__icon { color: var(--v1); border-color: var(--v1-soft); background: var(--v1-soft); }

.flow__title {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 4px;
}
.flow__sub {
  font-size: 12px;
  color: var(--fg-dim);
  line-height: 1.5;
}

.flow__link {
  height: 40px;
  width: 100%;
}
.flow__path { animation: dash 1.6s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -24; } }

/* ---------- tools (prep / consult) ---------- */
.tools {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 860px) { .tools { grid-template-columns: 1fr; } }

.tool {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 300ms var(--ease), border-color 300ms var(--ease);
  position: relative;
  overflow: hidden;
}
.tool:hover { transform: translateY(-4px); border-color: var(--border-hi); }
.tool::after {
  content: "";
  position: absolute;
  top: -50%; right: -50%;
  width: 100%; height: 100%;
  background: radial-gradient(circle, var(--v1-soft), transparent 50%);
  opacity: 0;
  transition: opacity 400ms var(--ease);
  pointer-events: none;
}
.tool:hover::after { opacity: 1; }

.tool__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.tool__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--v2);
  background: var(--v2-soft);
  padding: 4px 10px;
  border-radius: 999px;
}
.tool__name {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.tool__name code {
  background: none;
  border: none;
  padding: 0;
  color: var(--fg);
  font-size: 1em;
}
.tool__body {
  margin: 0 0 18px;
  color: var(--fg-soft);
  font-size: 14.5px;
  line-height: 1.6;
}

/* ===========================================================
   anatomy — ide-style archetype browser
   =========================================================== */
.section--anatomy { padding-top: 80px; padding-bottom: 80px; }

.ide {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  margin-top: 48px;
  background: linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.012));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.6),
              0 1px 0 rgba(255, 255, 255, 0.04) inset;
  position: relative;
}
.ide::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(600px 260px at 12% 0%, rgba(124, 92, 255, 0.10), transparent 60%),
    radial-gradient(600px 260px at 100% 100%, rgba(0, 212, 255, 0.07), transparent 60%);
  mix-blend-mode: screen;
}
@media (max-width: 860px) {
  .ide { grid-template-columns: 1fr; }
}

/* tree */
.ide__tree {
  position: relative;
  border-right: 1px solid var(--border);
  padding: 18px 14px 18px;
  background: rgba(0, 0, 0, 0.18);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 100%;
  z-index: 1;
}
@media (max-width: 860px) {
  .ide__tree {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

.ide__tree-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border-bottom: 1px solid var(--border);
}
.ide__tree-head svg { color: var(--fg-dim); flex-shrink: 0; }

.ide__files {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ide__file {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 10px 8px 12px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-soft);
  text-align: left;
  border-left: 2px solid transparent;
  transition: background 200ms var(--ease),
              color 200ms var(--ease),
              border-color 200ms var(--ease),
              transform 200ms var(--ease);
}
.ide__file:hover {
  background: rgba(255, 255, 255, 0.035);
  color: var(--fg);
  transform: translateX(1px);
}
.ide__file.is-active {
  background: linear-gradient(90deg, rgba(124, 92, 255, 0.15), rgba(124, 92, 255, 0.02));
  color: var(--fg);
  border-left-color: var(--v1);
}
.ide__file-name { font-size: 13px; }

.ide__file-ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 18px;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 4px;
  color: #0b0d14;
  flex-shrink: 0;
}
.ide__file-ic[data-ext="md"] { background: #9aa4bd; }
.ide__file-ic[data-ext="py"] { background: #ffd247; }
.ide__file-ic[data-ext="cs"] { background: #a179dc; color: #fff; }

.ide__more {
  padding: 8px 12px 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dimmer);
  letter-spacing: 0.02em;
}

.ide__legend {
  margin-top: auto;
  padding: 14px 10px 4px;
  border-top: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 11px;
  line-height: 1.5;
  color: var(--fg-dim);
}
.ide__legend .dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: 1px;
}
.ide__legend .dot--v1 { background: var(--v1); box-shadow: 0 0 10px var(--v1); }
.ide__legend .dot--v2 { background: var(--v2); box-shadow: 0 0 10px var(--v2); }

/* editor */
.ide__editor {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  z-index: 1;
}

.ide__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.22);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
}
.ide__bar .ide__path {
  flex: 1 1 auto;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ide__bar #ide-active { color: var(--fg); }

.ide__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  opacity: 0.9;
}
.ide__dot.dot--a { background: #ff6b7d; }
.ide__dot.dot--b { background: #ffcb6b; }
.ide__dot.dot--c { background: #6bff9d; }

.ide__body {
  position: relative;
  min-height: 460px;
  max-height: 560px;
  overflow: auto;
  padding: 22px 24px 28px;
}
.ide__body::-webkit-scrollbar { width: 10px; height: 10px; }
.ide__body::-webkit-scrollbar-track { background: transparent; }
.ide__body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
}
.ide__body::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.14); }

.ide__code {
  display: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--fg-soft);
  white-space: pre;
  tab-size: 2;
}
.ide__code code { font: inherit; color: inherit; }
.ide__code.is-active {
  display: block;
  animation: ide-fade 360ms var(--ease-out);
}
.ide__code .c--k   { color: var(--t-key); font-weight: 500; }
.ide__code .c--t   { color: var(--t-type); }
.ide__code .c--f   { color: var(--t-fn); }
.ide__code .c--s   { color: var(--t-str); }
.ide__code .c--n   { color: var(--t-num); }
.ide__code .c--cmt { color: var(--t-cmt); font-style: italic; }
.ide__code .c--h {
  display: inline-block;
  color: var(--v2);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: 0.2em;
}

@keyframes ide-fade {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===========================================================
   archetypes
   =========================================================== */
.archetype-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 960px) { .archetype-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .archetype-grid { grid-template-columns: 1fr; } }

.archetype {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 350ms var(--ease-out), border-color 350ms var(--ease-out), background 350ms var(--ease-out);
  cursor: default;
}
.archetype:hover {
  transform: translateY(-4px);
  border-color: var(--border-hi);
  background: var(--bg-card-hi);
}
.archetype::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--v1), var(--v2), var(--v3));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 500ms var(--ease-out);
}
.archetype:hover::before { transform: scaleX(1); }
.archetype--planned { opacity: 0.75; }
.archetype--planned::before { background: linear-gradient(90deg, var(--fg-dimmer), var(--fg-dim)); }

.archetype__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}
.archetype__badge {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding: 3px 9px;
  border-radius: 999px;
}
.archetype__badge--stable  { background: var(--ok-soft);   color: var(--ok); }
.archetype__badge--draft   { background: var(--warn-soft); color: var(--warn); }
.archetype__badge--planned { background: var(--bg-card-hi); color: var(--fg-dim); }

.archetype__id {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
  text-align: right;
}

.archetype__title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.archetype__body {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--fg-soft);
  line-height: 1.6;
}
.archetype__langs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.archetype__langs span {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg-soft);
  background: rgba(255,255,255,0.02);
}
.archetype__soon { color: var(--fg-dim) !important; font-style: italic; }

/* ===========================================================
   GUARD reveal
   =========================================================== */
.section--guard { text-align: center; }
.guard {
  max-width: 900px;
  margin: 0 auto;
}
.guard__title {
  font-size: clamp(30px, 5vw, 64px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 22px 0 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em 0.5em;
  justify-content: center;
}
.guard__letter {
  opacity: 0;
  transform: translateY(32px) scale(0.96);
  filter: blur(6px);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out), filter 700ms var(--ease-out);
  color: var(--fg-soft);
}
.guard__letter b {
  color: transparent;
  background: linear-gradient(135deg, var(--v1), var(--v2), var(--v3));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  font-weight: 800;
  animation: gradient-shift 5s ease-in-out infinite;
}
.guard__title.is-visible .guard__letter {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}
.guard__title.is-visible .guard__letter:nth-child(1) { transition-delay: 60ms; }
.guard__title.is-visible .guard__letter:nth-child(2) { transition-delay: 180ms; }
.guard__title.is-visible .guard__letter:nth-child(3) { transition-delay: 300ms; }
.guard__title.is-visible .guard__letter:nth-child(4) { transition-delay: 420ms; }
.guard__title.is-visible .guard__letter:nth-child(5) { transition-delay: 540ms; }
.guard__sub {
  font-size: clamp(15px, 1.3vw, 17px);
  color: var(--fg-soft);
  max-width: 640px;
  margin: 0 auto;
}

/* ===========================================================
   install panels + tabs
   =========================================================== */
.panel {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
  padding: 6px;
}
.tab {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 9px 14px;
  border-radius: 8px;
  color: var(--fg-dim);
  transition: all 200ms var(--ease);
  white-space: nowrap;
}
.tab:hover { color: var(--fg); background: rgba(255,255,255,0.03); }
.tab.is-active {
  color: var(--fg);
  background: linear-gradient(135deg, rgba(124,92,255,0.18), rgba(0,212,255,0.08));
  box-shadow: 0 0 0 1px var(--border-hi);
}

.panel__body { position: relative; }
.code--install {
  display: none;
  border: none;
  border-radius: 0;
  background: rgba(0,0,0,0.35);
  padding: 22px 24px;
  font-size: 13px;
  line-height: 1.7;
}
.code--install.is-active { display: block; }
.code--install code { white-space: pre; display: block; padding-right: 70px; }

.copy {
  position: absolute;
  top: 14px; right: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 6px 12px;
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--fg-dim);
  transition: all 200ms var(--ease);
  z-index: 2;
}
.copy:hover {
  background: var(--v1-soft);
  border-color: var(--v1);
  color: #fff;
}
.copy.is-copied {
  background: var(--ok-soft);
  border-color: var(--ok);
  color: var(--ok);
}

/* ===========================================================
   team
   =========================================================== */
.section--team { text-align: center; }

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 560px;
  margin: 0 auto 40px;
}
@media (max-width: 480px) { .team-grid { grid-template-columns: 1fr; max-width: 280px; } }

.team-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 36px 24px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 300ms var(--ease), background 300ms var(--ease), transform 300ms var(--ease);
}
.team-card:hover {
  border-color: var(--border-hi);
  background: var(--bg-card-hi);
  transform: translateY(-4px);
}

.team-card__photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border-hi);
  background: linear-gradient(135deg, var(--v1-soft), var(--v2-soft));
}
.team-card__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-card__name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}
.team-card__role {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
}
.team-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--v2);
  margin-top: 4px;
  transition: color 200ms var(--ease);
}
.team-card:hover .team-card__link { color: var(--fg); }

.team-contact {
  text-align: center;
}
.team-contact__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--fg-dim);
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}
.team-contact__link:hover {
  color: var(--v2);
  border-color: var(--v2);
}

/* ===========================================================
   outro
   =========================================================== */
.section--outro { padding-top: clamp(32px, 5vw, 64px); }
.outro {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  padding: clamp(48px, 8vw, 80px) clamp(32px, 5vw, 64px);
  background: linear-gradient(135deg, rgba(124,92,255,0.08), rgba(0,212,255,0.05), rgba(255,78,205,0.06));
  border: 1px solid var(--border-hi);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}
.outro::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: conic-gradient(from 0deg, var(--v1), var(--v2), var(--v3), var(--v1));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  animation: spin 10s linear infinite;
  opacity: 0.45;
  pointer-events: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

.outro__title {
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0 0 32px;
}
.outro__cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ===========================================================
   footer
   =========================================================== */
.footer {
  border-top: 1px solid var(--border);
  margin-top: clamp(40px, 6vw, 80px);
  padding: clamp(40px, 6vw, 72px) clamp(20px, 4vw, 40px) 32px;
}
.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
}
@media (max-width: 720px) { .footer__inner { grid-template-columns: 1fr; } }

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.footer__brand .nav__mark { width: 24px; height: 24px; }

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
@media (max-width: 560px) { .footer__cols { grid-template-columns: repeat(2, 1fr); } }

.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
  margin: 0 0 14px;
  font-weight: 600;
}
.footer__col a {
  display: block;
  font-size: 14px;
  color: var(--fg-soft);
  padding: 5px 0;
  transition: color 200ms var(--ease), transform 200ms var(--ease);
}
.footer__col a:hover { color: var(--v2); transform: translateX(3px); }

.footer__meta {
  max-width: var(--max-w);
  margin: 40px auto 0;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
  flex-wrap: wrap;
  gap: 12px;
}
.footer__meta a { color: var(--v2); }
.footer__meta a:hover { text-decoration: underline; }

/* ===========================================================
   architecture deep-dive
   =========================================================== */
.section--arch { padding-bottom: 80px; }

.arch {
  max-width: 860px;
  margin: 0 auto 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 400ms var(--ease-out);
  position: relative;
}
.arch:hover { border-color: var(--border-hi); }
.arch:last-child { margin-bottom: 0; }

/* top accent bar per phase */
.arch::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  pointer-events: none;
  z-index: 1;
}
.arch--boot::before    { background: linear-gradient(90deg, var(--v1), transparent 80%); }
.arch--search::before  { background: linear-gradient(90deg, var(--v2), transparent 80%); }
.arch--deliver::before { background: linear-gradient(90deg, var(--v3), transparent 80%); }

/* phase header */
.arch__head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
}
.arch__num {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}
.arch--boot    .arch__num { background: var(--v1-soft); color: var(--v1); border: 1px solid rgba(124,92,255,0.3); }
.arch--search  .arch__num { background: var(--v2-soft); color: var(--v2); border: 1px solid rgba(0,212,255,0.3); }
.arch--deliver .arch__num { background: var(--v3-soft); color: var(--v3); border: 1px solid rgba(255,78,205,0.3); }
.arch__name {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.arch__when {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
  margin-top: 2px;
}
.arch__when code { font-size: inherit; padding: 0; background: none; border: none; color: var(--v2); }

/* flow body */
.arch__body {
  padding: 32px 28px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* rows */
.arch__row {
  display: flex;
  justify-content: center;
  gap: 20px;
  width: 100%;
  max-width: 720px;
}
.arch__row--split { gap: 24px; }
.arch__row:not(.arch__row--split) .arch__node { max-width: 480px; }

/* node */
.arch__node {
  flex: 1;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: transform 300ms var(--ease), border-color 300ms var(--ease), box-shadow 300ms var(--ease);
  position: relative;
}
.arch__node:hover {
  transform: translateY(-2px);
  border-color: var(--border-hi);
  box-shadow: 0 12px 32px -12px rgba(0,0,0,0.4);
}

/* node icon */
.arch__ic {
  width: 36px; height: 36px;
  border-radius: 8px;
  display: grid; place-items: center;
  flex-shrink: 0;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--fg-dim);
}
.arch__node--source .arch__ic { color: var(--fg-soft); background: rgba(255,255,255,0.06); }
.arch__node--kw .arch__ic     { color: var(--v1); background: var(--v1-soft); border-color: rgba(124,92,255,0.25); }
.arch__node--em .arch__ic     { color: var(--v2); background: var(--v2-soft); border-color: rgba(0,212,255,0.25); }
.arch__node--hub .arch__ic    { color: var(--ok); background: var(--ok-soft); border-color: rgba(107,255,157,0.25); }
.arch__node--input .arch__ic  { color: var(--fg-soft); background: rgba(255,255,255,0.06); }
.arch__node--blend .arch__ic  { color: var(--v3); background: var(--v3-soft); border-color: rgba(255,78,205,0.25); }
.arch__node--lang .arch__ic   { color: var(--v2); background: var(--v2-soft); border-color: rgba(0,212,255,0.25); }
.arch__node--uni .arch__ic    { color: var(--v1); background: var(--v1-soft); border-color: rgba(124,92,255,0.25); }

.arch__txt { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.arch__lbl {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.arch__sub {
  font-size: 12px;
  color: var(--fg-dim);
  line-height: 1.5;
}
.arch__sub code { font-size: inherit; padding: 0; background: none; border: none; color: var(--v2); }

/* weight badge */
.arch__badge {
  position: absolute;
  top: 10px; right: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--fg-dim);
}

/* wires */
.arch__wire {
  display: flex;
  justify-content: center;
  align-items: stretch;
  width: 100%;
  height: 32px;
  position: relative;
}
.arch__wire > span {
  display: block;
  width: 2px;
  background: var(--border-hi);
  border-radius: 1px;
  position: relative;
  overflow: visible;
}

/* fork: vertical line + horizontal spread at bottom */
.arch__wire--fork { height: 36px; }
.arch__wire--fork::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 22%;
  right: 22%;
  height: 2px;
  background: var(--border-hi);
  border-radius: 1px;
  transform-origin: center;
  transform: scaleX(0);
  transition: transform 500ms var(--ease-out);
}
.arch.is-visible .arch__wire--fork::after { transform: scaleX(1); }

/* merge: horizontal gather at top + vertical line */
.arch__wire--merge { height: 36px; }
.arch__wire--merge::after {
  content: '';
  position: absolute;
  top: 0;
  left: 22%;
  right: 22%;
  height: 2px;
  background: var(--border-hi);
  border-radius: 1px;
  transform-origin: center;
  transform: scaleX(0);
  transition: transform 500ms var(--ease-out);
}
.arch.is-visible .arch__wire--merge::after { transform: scaleX(1); }

/* ---- staggered cascade reveal ---- */
.arch .arch__body > * {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 450ms var(--ease-out), transform 450ms var(--ease-out);
}
.arch.is-visible .arch__body > * {
  opacity: 1;
  transform: translateY(0);
}
.arch.is-visible .arch__body > :nth-child(1) { transition-delay: 100ms; }
.arch.is-visible .arch__body > :nth-child(2) { transition-delay: 200ms; }
.arch.is-visible .arch__body > :nth-child(3) { transition-delay: 300ms; }
.arch.is-visible .arch__body > :nth-child(4) { transition-delay: 400ms; }
.arch.is-visible .arch__body > :nth-child(5) { transition-delay: 500ms; }
.arch.is-visible .arch__body > :nth-child(6) { transition-delay: 600ms; }
.arch.is-visible .arch__body > :nth-child(7) { transition-delay: 700ms; }

/* ---- flowing data dot on wires ---- */
.arch.is-visible .arch__wire > span::after {
  content: '';
  position: absolute;
  left: 50%;
  width: 6px;
  height: 6px;
  margin-left: -3px;
  border-radius: 50%;
  animation: wire-dot 2s var(--ease) infinite;
}
.arch--boot .arch__wire > span::after {
  background: var(--v1);
  box-shadow: 0 0 6px var(--v1), 0 0 14px var(--v1-soft);
}
.arch--search .arch__wire > span::after {
  background: var(--v2);
  box-shadow: 0 0 6px var(--v2), 0 0 14px var(--v2-soft);
}
.arch--deliver .arch__wire > span::after {
  background: var(--v3);
  box-shadow: 0 0 6px var(--v3), 0 0 14px var(--v3-soft);
}
@keyframes wire-dot {
  0%   { top: -6px; opacity: 0; }
  15%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { top: calc(100% - 2px); opacity: 0; }
}
/* stagger wire dots so they don't all pulse in sync */
.arch .arch__body > :nth-child(2) > span::after { animation-delay: 0s; }
.arch .arch__body > :nth-child(4) > span::after { animation-delay: 0.6s; }
.arch .arch__body > :nth-child(6) > span::after { animation-delay: 1.2s; }

/* ---- subtle glow pulse on key nodes ---- */
.arch.is-visible .arch__node--hub,
.arch.is-visible .arch__node--blend {
  animation: node-glow 4s ease-in-out 1s infinite;
}
@keyframes node-glow {
  0%, 100% { box-shadow: none; }
  50%      { box-shadow: 0 0 20px -4px var(--ok-soft); }
}
.arch.is-visible .arch__node--blend {
  animation-name: node-glow-v3;
}
@keyframes node-glow-v3 {
  0%, 100% { box-shadow: none; }
  50%      { box-shadow: 0 0 20px -4px var(--v3-soft); }
}

/* ---- phase number glow pulse ---- */
.arch.is-visible .arch__num {
  animation: num-glow 3s ease-in-out 0.6s infinite;
}
@keyframes num-glow {
  0%, 100% { box-shadow: none; }
  50%      { box-shadow: 0 0 18px -2px currentColor; }
}

/* responsive */
@media (max-width: 640px) {
  .arch__row--split { flex-direction: column; align-items: center; }
  .arch__row--split .arch__node { max-width: 100%; }
  .arch__wire--fork::after,
  .arch__wire--merge::after { display: none; }
  .arch__body { padding: 24px 18px 28px; }
  .arch__head { padding: 16px 18px; }
}
@media (prefers-reduced-motion: reduce) {
  .arch .arch__body > * { opacity: 1; transform: none; }
  .arch__wire > span::after { display: none; }
  .arch__node--hub, .arch__node--blend, .arch__num { animation: none !important; }
}

/* ===========================================================
   reveal on scroll (IntersectionObserver)
   =========================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  filter: blur(4px);
  transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out), filter 800ms var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; filter: none; }
  .hero__word { opacity: 1; transform: none; }
  .guard__letter { opacity: 1; transform: none; filter: none; }
  .mesh { display: none; }
}