/* ─── BEING ZETETIC · GLOBAL STYLES · TURQUOISE ─── */

:root {
  --bg: #07151a;            /* deep teal-black */
  --bg-elev: #0c1f25;
  --bg-card: #0f242c;
  --border: #163038;
  --border-strong: #1f4250;
  --fg: #eaf6f7;
  --fg-dim: #9ab6bb;
  --fg-mute: #5b7a7f;
  --acc: #3ad6c6;           /* turquoise */
  --acc-bright: #6cf0e0;    /* hover/bright */
  --acc-dim: #1a8a7e;
  --acc-glow: rgba(58, 214, 198, 0.18);
  --link: #eaf6f7;
  --link-hover: #3ad6c6;
  --serif: 'Instrument Serif', 'Iowan Old Style', Georgia, serif;
  --mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max: 1180px;
  --max-prose: 720px;
  --radius: 6px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(1200px 600px at 80% -10%, var(--acc-glow), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(58, 214, 198, 0.07), transparent 60%),
    var(--bg);
}

a { color: var(--link); text-decoration: none; border-bottom: 1px solid transparent; transition: color 0.15s, border-color 0.15s; }
a:hover { color: var(--link-hover); border-bottom-color: var(--acc); }

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

/* ─── TYPOGRAPHY ─── */

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--fg);
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.25rem; font-weight: 500; }

.mono { font-family: var(--mono); }
.serif { font-family: var(--serif); }
.dim { color: var(--fg-dim); }
.mute { color: var(--fg-mute); }
.acc { color: var(--acc); }

p { color: var(--fg-dim); }
p.lead { font-size: 1.125rem; line-height: 1.7; color: var(--fg); }

/* ─── LAYOUT ─── */

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.prose { max-width: var(--max-prose); }
main { flex: 1; }

/* ─── NAV ─── */

nav.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 21, 26, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
nav.top .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
  gap: 16px;
  min-width: 0;
}
nav.top .brand {
  font-family: var(--serif);
  letter-spacing: 0.01em;
  color: var(--fg);
  border: none;
  line-height: 1;
  flex: 0 0 auto;
  min-width: 0;
}
nav.top ul { list-style: none; display: flex; gap: 28px; align-items: center; flex: 0 1 auto; min-width: 0; flex-wrap: wrap; justify-content: flex-end; }
nav.top ul a { font-family: var(--mono); font-size: 0.8rem; color: var(--fg-dim); border: none; text-transform: uppercase; letter-spacing: 0.05em; }
nav.top ul a:hover { color: var(--fg); }
nav.top ul a.active { color: var(--acc); position: relative; }
nav.top ul a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--acc);
  box-shadow: 0 0 8px var(--acc-glow);
}
nav.top .cta { font-family: var(--mono); font-size: 0.8rem; color: var(--acc); border: 1px solid var(--acc-dim); padding: 7px 16px; border-radius: var(--radius); }
nav.top .cta:hover { background: var(--acc); color: var(--bg); border-color: var(--acc); }

/* ─── HERO ─── */

.hero {
  padding: 120px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(58, 214, 198, 0.12) 0%, transparent 60%);
  pointer-events: none;
}
.hero .eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--acc);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 24px;
}
.hero h1 { margin-bottom: 24px; }
.hero h1 .em { font-style: italic; color: var(--acc); }
.hero .sub {
  font-size: 1.2rem;
  color: var(--fg-dim);
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.6;
}
.hero .zeta {
  font-family: var(--serif);
  font-size: 7rem;
  color: var(--acc);
  opacity: 0.10;
  position: absolute;
  top: 40px; right: 8%;
  pointer-events: none;
  user-select: none;
  max-width: 30vw;
  line-height: 1;
  z-index: 0;
}
/* keep hero text above the zeta */
.hero .wrap { position: relative; z-index: 1; }

/* ─── SECTIONS ─── */

section { padding: 80px 0; border-top: 1px solid var(--border); }
section.tight { padding: 56px 0; }
section .section-head { margin-bottom: 48px; }
section .section-head .label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--acc);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 12px;
}
section .section-head h2 { margin-bottom: 16px; }
section .section-head p { max-width: 640px; font-size: 1.05rem; }

/* ─── MODE CARDS (Landing) ─── */

.modes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
@media (max-width: 880px) { .modes { grid-template-columns: 1fr; } }

.mode {
  background: var(--bg-card);
  padding: 36px 32px;
  display: flex; flex-direction: column;
  transition: background 0.2s;
  position: relative;
}
.mode::after {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px; background: var(--acc);
  transform: scaleY(0); transform-origin: top;
  transition: transform 0.25s;
}
.mode:hover { background: var(--bg-elev); }
.mode:hover::after { transform: scaleY(1); }
.mode .num {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-mute);
  margin-bottom: 16px;
  letter-spacing: 0.1em;
}
.mode h3 {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--acc);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  min-height: 2.4em;
}
.mode p { font-size: 0.95rem; margin-bottom: 24px; flex: 1; }
.mode .best { font-family: var(--mono); font-size: 0.75rem; color: var(--fg-mute); margin-bottom: 24px; padding-top: 16px; border-top: 1px solid var(--border); }
.mode .actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ─── BUTTONS ─── */

.btn {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { border-color: var(--acc); color: var(--acc); }
.btn.primary { background: var(--acc); color: var(--bg); border-color: var(--acc); font-weight: 500; }
.btn.primary:hover { background: var(--acc-bright); color: var(--bg); border-color: var(--acc-bright); }
.btn .arrow { transition: transform 0.15s; }
.btn:hover .arrow { transform: translateX(2px); }

/* ─── STEPS ─── */

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
@media (max-width: 880px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }
.step .n {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--acc);
  margin-bottom: 12px;
  letter-spacing: 0.15em;
}
.step h4 { font-family: var(--serif); font-size: 1.15rem; margin-bottom: 8px; color: var(--fg); }
.step p { font-size: 0.9rem; }

/* ─── MAKER / SIGNATURE ─── */

.maker {
  position: relative;
  padding: 64px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}
.maker.maker--prominent {
  border-top: none;
  padding: 72px 0 80px;
  background: transparent;
}
.maker.maker--prominent::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 70%; max-width: 600px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--acc-dim), transparent);
  opacity: 0.5;
}
.maker .label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--acc);
  text-transform: uppercase;
  letter-spacing: 0.25em;
  margin-bottom: 20px;
}
.maker .name {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--fg);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.maker .name .acc { color: var(--acc); }
.maker .role {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-bottom: 28px;
}
.maker .links { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.maker .links a {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 10px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--fg);
  background: var(--bg-card);
  transition: all 0.2s;
}
.maker .links a:hover { border-color: var(--acc); color: var(--acc); background: var(--bg-elev); }
.maker .links a .ic { width: 16px; height: 16px; display: inline-block; }
.maker .links a .ic svg { width: 100%; height: 100%; display: block; fill: currentColor; }

/* ─── FOOTER ─── */

footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 0;
  background: var(--bg);
}
footer .wrap {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
footer .copy { font-family: var(--mono); font-size: 0.75rem; color: var(--fg-mute); }
footer .copy .name { color: var(--acc); }
footer .links { display: flex; gap: 20px; align-items: center; }
footer .links a { font-family: var(--mono); font-size: 0.75rem; color: var(--fg-dim); border: none; display: inline-flex; align-items: center; gap: 6px; }
footer .links a:hover { color: var(--acc); }
footer .links a .ic { width: 14px; height: 14px; display: inline-block; }
footer .links a .ic svg { width: 100%; height: 100%; display: block; fill: currentColor; }

/* ─── MODE PAGES (Human) ─── */

.page-head { padding: 80px 0 40px; border-bottom: 1px solid var(--border); }
.page-head .crumb { font-family: var(--mono); font-size: 0.75rem; color: var(--fg-mute); margin-bottom: 20px; }
.page-head .crumb a { color: var(--fg-dim); border: none; }
.page-head .crumb a:hover { color: var(--acc); }
.page-head h1 { margin-bottom: 20px; }
.page-head h1 .em { color: var(--acc); font-style: italic; }
.page-head .sub { font-size: 1.15rem; color: var(--fg-dim); max-width: 640px; }
.page-head .meta { display: flex; gap: 24px; margin-top: 28px; flex-wrap: wrap; }
.page-head .meta div { font-family: var(--mono); font-size: 0.75rem; color: var(--fg-mute); }
.page-head .meta div span { color: var(--fg); }

.content { padding: 64px 0; }
.content h2 { font-size: 1.6rem; margin: 48px 0 16px; }
.content h2:first-child { margin-top: 0; }
.content h3 { font-family: var(--mono); font-size: 0.85rem; font-weight: 500; color: var(--acc); text-transform: uppercase; letter-spacing: 0.05em; margin: 32px 0 12px; }
.content p { font-size: 1rem; margin-bottom: 16px; line-height: 1.7; }
.content ul { margin: 16px 0 16px 24px; color: var(--fg-dim); }
.content ul li { margin-bottom: 8px; }
.content code { font-family: var(--mono); font-size: 0.85em; background: var(--bg-elev); padding: 2px 6px; border-radius: 3px; color: var(--acc); }
.content blockquote {
  border-left: 2px solid var(--acc);
  padding: 8px 0 8px 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--fg);
}

.example {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin: 32px 0;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--fg-dim);
  white-space: pre-wrap;
  overflow-x: auto;
}
.example .acc { color: var(--acc); }

.prompt-box {
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 24px;
  margin: 32px 0;
  position: relative;
}
.prompt-box .label { font-family: var(--mono); font-size: 0.7rem; color: var(--acc); text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 12px; }
.prompt-box pre { font-family: var(--mono); font-size: 0.8rem; color: var(--fg); white-space: pre-wrap; line-height: 1.6; max-height: 320px; overflow-y: auto; }
.prompt-box .copy-btn { position: absolute; top: 16px; right: 16px; }
.prompt-box .copied { color: var(--acc); font-family: var(--mono); font-size: 0.75rem; }

.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 24px 0; }
@media (max-width: 640px) { .feature-grid { grid-template-columns: 1fr; } }
.feature { padding: 20px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.feature .lbl { font-family: var(--mono); font-size: 0.7rem; color: var(--acc); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 8px; }
.feature h4 { font-family: var(--serif); font-size: 1.05rem; margin-bottom: 8px; }
.feature p { font-size: 0.85rem; margin: 0; }

/* ─── MACHINE PAGES (Raw prompt) ─── */

.machine-page {
  background: var(--bg);
  min-height: 100vh;
  padding: 60px 24px;
}
.machine-page .mp-wrap { max-width: 780px; margin: 0 auto; }
.machine-page .mp-head { margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.machine-page .mp-head .crumb { font-family: var(--mono); font-size: 0.75rem; color: var(--fg-mute); margin-bottom: 16px; }
.machine-page .mp-head .crumb a { color: var(--fg-dim); border: none; }
.machine-page .mp-head .crumb a:hover { color: var(--acc); }
.machine-page .mp-head h1 { font-family: var(--mono); font-size: 1.1rem; color: var(--acc); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 12px; }
.machine-page .mp-head p { font-size: 0.9rem; }
.machine-page .mp-body {
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--fg);
  white-space: pre-wrap;
  word-wrap: break-word;
}
.machine-page .mp-actions { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.machine-page .mp-actions .copied { color: var(--acc); font-family: var(--mono); font-size: 0.8rem; }

/* ─── MACHINE HUB ─── */

.hub-list { display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.hub-item { background: var(--bg-card); padding: 28px 32px; display: grid; grid-template-columns: auto 1fr auto; gap: 24px; align-items: center; transition: background 0.15s; }
.hub-item:hover { background: var(--bg-elev); }
.hub-item .n { font-family: var(--mono); font-size: 0.75rem; color: var(--acc); letter-spacing: 0.1em; }
.hub-item h3 { font-family: var(--mono); font-size: 0.95rem; color: var(--fg); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.05em; }
.hub-item p { font-size: 0.85rem; color: var(--fg-mute); margin: 0; }
.hub-item a.btn { white-space: nowrap; }
@media (max-width: 640px) { .hub-item { grid-template-columns: 1fr; gap: 12px; } }

/* ─── UTILITIES ─── */

.spacer-sm { height: 24px; }
.spacer-md { height: 48px; }
.spacer-lg { height: 80px; }
.divider { height: 1px; background: var(--border); margin: 48px 0; }

.text-center { text-align: center; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }

/* ─── ANIMATIONS ─── */

@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { animation: fadeUp 0.6s ease-out both; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--acc-dim); }

/* ─── COPY BUTTON STATES ─── */

[data-copy] { position: relative; overflow: hidden; }

[data-copy] [data-label] {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s, transform 0.2s;
}

[data-copy].is-copied {
  background: var(--acc) !important;
  color: var(--bg) !important;
  border-color: var(--acc) !important;
  box-shadow: 0 0 0 3px var(--acc-glow), 0 0 24px var(--acc-glow);
}
[data-copy].is-copied [data-label] {
  animation: copyPop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-copy].is-error {
  background: transparent;
  color: #ff8a7a;
  border-color: #ff8a7a;
}

[data-copy] .ripple {
  position: absolute;
  inset: 0;
  background: var(--acc);
  opacity: 0.35;
  pointer-events: none;
  animation: copyRipple 0.65s ease-out forwards;
}

@keyframes copyPop {
  0%   { transform: scale(0.6); opacity: 0; }
  50%  { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1);    opacity: 1; }
}

@keyframes copyRipple {
  0%   { transform: scale(0);   opacity: 0.4; border-radius: 50%; }
  100% { transform: scale(2.2); opacity: 0;   border-radius: 50%; }
}

/* ─── BIGFOOT (link-grid footer) ─── */

.bigfoot {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 64px 0 40px;
  margin-top: 0;
}
.bigfoot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}
@media (max-width: 880px) { .bigfoot-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 24px; } }
@media (max-width: 480px) { .bigfoot-grid { grid-template-columns: 1fr 1fr; } }

.bigfoot-h {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--acc);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
  font-weight: 500;
}
.bigfoot-col { display: flex; flex-direction: column; gap: 10px; }
.bigfoot-col a {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--fg-dim);
  border: none;
  display: block;
  padding: 2px 0;
  transition: color 0.15s;
}
.bigfoot-col a:hover { color: var(--fg); }

.bigfoot-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-top: 32px;
  gap: 24px;
  flex-wrap: wrap;
}
.bigfoot-meta-left {
  display: flex; align-items: baseline; gap: 12px;
  font-family: var(--serif);
}
.bigfoot-product { font-size: 1.4rem; color: var(--fg); letter-spacing: -0.01em; }
.bigfoot-version { font-family: var(--mono); font-size: 0.75rem; color: var(--fg-mute); }
.bigfoot-meta-right {
  font-size: 0.85rem;
  color: var(--fg-dim);
  text-align: right;
  line-height: 1.5;
}
.bigfoot-meta-right a { color: var(--acc); border: none; }
.bigfoot-meta-right a:hover { border-bottom: 1px solid var(--acc); }

/* When bigfoot is used, hide the simple footer */
footer:not(.bigfoot) { display: none; }

/* ─── BRAND BLOCK IN NAV: maker mark | project title ─── */
nav.top .brand {
  display: flex;
  align-items: center;
  gap: 14px;
  line-height: 1;
  border: none;
  text-decoration: none;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 4px;
  filter: drop-shadow(0 0 8px rgba(58, 214, 198, 0.18));
  transition: filter 0.25s;
  flex: 0 0 auto;
}
.brand-mark img {
  height: 34px;
  width: auto;
  display: block;
}
nav.top .brand:hover .brand-mark {
  filter: drop-shadow(0 0 14px rgba(58, 214, 198, 0.45));
}
.brand-sep {
  width: 1px;
  height: 26px;
  background: linear-gradient(to bottom, transparent, var(--border-strong), transparent);
  position: relative;
  flex: 0 0 auto;
}
.brand-sep::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
  width: 5px; height: 5px;
  background: var(--acc);
  border-radius: 1px;
  box-shadow: 0 0 8px rgba(58, 214, 198, 0.55);
}
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1;
}
.brand-text .title {
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--fg);
  letter-spacing: 0.005em;
  line-height: 1;
}
.brand-text .title .em { color: var(--acc); font-style: italic; }
.brand-text .sub {
  font-family: var(--mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--fg-mute);
  line-height: 1;
  margin-top: 4px;
}

/* Brand block on small screens */
@media (max-width: 720px) {
  nav.top .brand { gap: 10px; }
  .brand-mark { height: 28px; }
  .brand-mark img { height: 28px; }
  .brand-sep { height: 22px; }
  .brand-text .title { font-size: 1.05rem; }
  .brand-text .sub { font-size: 0.55rem; letter-spacing: 0.18em; }
  nav.top ul { gap: 18px; }
  nav.top .wrap { height: auto; min-height: 72px; padding-top: 12px; padding-bottom: 12px; }
}
@media (max-width: 720px) {
  .hero-title { gap: 14px; padding: 14px 16px; }
  .hero-mark { height: 48px; }
}
@media (max-width: 600px) {
  /* stack the hero title cluster on small screens so it never overflows */
  .hero-title { flex-direction: column; gap: 10px; padding: 0; }
  .hero-title::before, .hero-title::after { display: none; }
  .hero-mark { height: 44px; }
  .hero-title .word { font-size: clamp(1.8rem, 7vw, 2.4rem); white-space: normal; }
}
@media (max-width: 480px) {
  .brand-text .sub { display: none; }
  .brand-sep { display: none; }
  nav.top .brand { gap: 6px; }
  /* on very small screens, stack brand on top and nav below */
  nav.top .wrap { flex-direction: column; height: auto; padding: 10px 16px; gap: 8px; }
  nav.top ul { gap: 10px; justify-content: center; width: 100%; }
  nav.top ul a { font-size: 0.7rem; letter-spacing: 0.02em; }
  nav.top .cta { padding: 5px 9px; font-size: 0.7rem; }
  .hero { padding: 80px 0 56px; }
  .hero .zeta { font-size: 3.5rem; right: 4%; top: 8px; }
  .hero-title { gap: 10px; margin-bottom: 18px; }
  .hero-mark { height: 40px; }
  h1 { font-size: clamp(1.75rem, 7.5vw, 2.5rem); }
  .hero .sub { font-size: 1rem; }
}

/* ─── HERO LOGO + PROJECT TITLE (landing) ─── */
.hero-title {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  margin: 0 auto 36px;
  padding: 18px 28px;
  position: relative;
}
.hero-title::before, .hero-title::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-strong), transparent);
  min-width: 32px;
  max-width: 120px;
}
.hero-mark {
  display: block;
  height: 64px;
  width: auto;
  filter: drop-shadow(0 0 22px rgba(58, 214, 198, 0.35));
  flex: 0 0 auto;
}
.hero-title .word {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  letter-spacing: -0.01em;
  color: var(--fg);
  line-height: 1;
  flex: 0 0 auto;
  white-space: nowrap;
}
.hero-title .word .em { color: var(--acc); font-style: italic; }
.hero-title .rule {
  width: 56px;
  height: 1px;
  background: var(--acc);
  opacity: 0.55;
  box-shadow: 0 0 12px rgba(58, 214, 198, 0.4);
}
.hero-title .tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--fg-mute);
  line-height: 1;
}