/* ============================================================
   Mnem marketing site — shared stylesheet.
   Dark, premium, cyan/teal "memory field" glow on near-black.
   System fonts only. No external assets. Responsive without JS.
   ============================================================ */

:root {
  --bg: #04080b;
  --bg-soft: #071019;
  --panel: #0a141d;
  --panel-hi: #0d1a24;
  --line: rgba(103, 232, 217, 0.16);
  --line-soft: rgba(103, 232, 217, 0.08);
  --text: #e8f3f4;
  --text-dim: #9fb5bc;
  --accent: #35e2cf;
  --accent-hi: #8ff7ea;
  --accent-dim: #17958c;
  --glow: rgba(53, 226, 207, 0.30);
  --ok: #43dfa0;
  --err: #ff7a76;
  --radius: 14px;
  --radius-sm: 9px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 520px at 75% -140px, rgba(53, 226, 207, 0.10), transparent 65%),
    radial-gradient(820px 480px at -10% 105%, rgba(34, 156, 190, 0.08), transparent 60%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }

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

h1, h2, h3 { line-height: 1.18; letter-spacing: -0.015em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2rem, 4.6vw, 3.3rem); font-weight: 750; }
h2 { font-size: clamp(1.45rem, 2.6vw, 2.05rem); font-weight: 700; }
h3 { font-size: 1.08rem; font-weight: 650; }

p { margin: 0 0 1em; }

.container { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.container.narrow { width: min(760px, calc(100% - 48px)); }

.muted { color: var(--text-dim); }
.mono { font-family: var(--mono); font-size: 0.92em; word-break: break-all; }

.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--panel-hi); color: var(--text);
  padding: 8px 14px; border-radius: var(--radius-sm); border: 1px solid var(--line);
}
.skip-link:focus { left: 8px; }

/* ---------- brand ---------- */

.brand { font-weight: 680; letter-spacing: 0.01em; }

.logo {
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--text); font-size: 1.12rem;
}
.logo:hover { text-decoration: none; }

.logo-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: radial-gradient(circle at 38% 32%, var(--accent-hi), var(--accent) 55%, #093c4a);
  box-shadow: 0 0 10px 2px var(--glow);
  display: inline-block; flex: none;
}

/* ---------- header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(4, 8, 11, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

.header-inner {
  display: flex; align-items: center; gap: 20px;
  padding: 14px 0;
  flex-wrap: wrap;
}

.site-nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }

.site-nav a {
  color: var(--text-dim);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--text); text-decoration: none; }
.site-nav a.active {
  color: var(--accent-hi);
  background: rgba(53, 226, 207, 0.09);
}

.header-cta { flex: none; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit; font-size: 0.98rem; font-weight: 600;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:disabled { opacity: 0.55; cursor: wait; transform: none; }

.btn-primary {
  color: #032420;
  background: linear-gradient(160deg, var(--accent-hi), var(--accent) 60%, #17b3a4);
  box-shadow: 0 0 22px var(--glow), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.btn-primary:hover { box-shadow: 0 0 34px var(--glow), inset 0 1px 0 rgba(255, 255, 255, 0.35); }

.btn-ghost {
  color: var(--accent-hi);
  background: rgba(53, 226, 207, 0.05);
  border-color: var(--line);
}
.btn-ghost:hover { background: rgba(53, 226, 207, 0.11); }

.btn-small { padding: 8px 16px; font-size: 0.9rem; }
.btn-block { width: 100%; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 20px 0 8px; }

/* ---------- hero ---------- */

.hero { padding: 76px 0 40px; overflow: hidden; }

.hero-inner {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 44px; align-items: center;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem; font-weight: 650;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 13px;
  margin: 0 0 18px;
  background: rgba(53, 226, 207, 0.05);
}
.eyebrow a { color: inherit; }

.glow-text {
  color: var(--accent-hi);
  text-shadow: 0 0 26px var(--glow);
}

.lede {
  font-size: 1.16rem;
  color: var(--text-dim);
  max-width: 56ch;
}

.hero-note { font-size: 0.9rem; color: var(--text-dim); margin-top: 16px; }

/* memory field visual (pure CSS) */

.hero-visual { display: flex; justify-content: center; }

.memory-field { position: relative; width: min(380px, 76vw); aspect-ratio: 1; }

.mf-core {
  position: absolute; inset: 27%;
  border-radius: 50%;
  background: radial-gradient(circle at 42% 36%,
    rgba(143, 247, 234, 0.95),
    rgba(53, 226, 207, 0.55) 42%,
    rgba(10, 62, 76, 0.92) 76%,
    rgba(4, 8, 11, 0.3));
  box-shadow: 0 0 60px 12px var(--glow), 0 0 150px 44px rgba(53, 226, 207, 0.12);
  animation: mf-breathe 7s ease-in-out infinite;
}

.mf-ring {
  position: absolute; inset: 8%;
  border-radius: 50%;
  border: 1px solid rgba(143, 247, 234, 0.20);
  box-shadow: inset 0 0 44px rgba(53, 226, 207, 0.07);
  animation: mf-spin 28s linear infinite;
}
.mf-ring::before {
  content: ""; position: absolute; top: -4px; left: 50%;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-hi);
  box-shadow: 0 0 12px 3px var(--glow);
}

.mf-dot {
  position: absolute; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-hi);
  box-shadow: 0 0 10px 2px var(--glow);
  opacity: 0.85;
  animation: mf-drift 9s ease-in-out infinite;
}
.mf-dot-1 { top: 15%; left: 24%; }
.mf-dot-2 { top: 70%; left: 12%; animation-delay: -2s; }
.mf-dot-3 { top: 22%; left: 79%; animation-delay: -4s; }
.mf-dot-4 { top: 82%; left: 68%; animation-delay: -6s; }
.mf-dot-5 { top: 48%; left: 92%; animation-delay: -3s; }

@keyframes mf-breathe { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }
@keyframes mf-spin { to { transform: rotate(360deg); } }
@keyframes mf-drift { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(6px, -10px); } }

/* ---------- sections ---------- */

.section { padding: 58px 0; }

.section-lede { color: var(--text-dim); max-width: 62ch; margin-bottom: 30px; }

.section-footnote { color: var(--text-dim); font-size: 0.92rem; margin-top: 26px; }

.page-hero { padding: 64px 0 8px; }

/* connector strip */

.connector-strip {
  border-block: 1px solid var(--line-soft);
  background: rgba(7, 16, 25, 0.55);
  padding: 26px 0;
}

.strip-label {
  font-size: 0.8rem; font-weight: 650;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.strip-list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 10px;
}
.strip-list a {
  display: inline-block;
  padding: 7px 15px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: var(--text-dim);
  font-size: 0.93rem;
  background: rgba(53, 226, 207, 0.03);
}
.strip-list a:hover {
  color: var(--accent-hi); border-color: var(--line);
  text-decoration: none;
  box-shadow: 0 0 14px rgba(53, 226, 207, 0.14);
}

/* grids & cards */

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  background: linear-gradient(175deg, var(--panel-hi), var(--panel) 55%);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 24px 24px 14px;
}
.card h3 { color: var(--accent-hi); }
.card p { color: var(--text-dim); font-size: 0.97rem; }

.feature-grid .card {
  border-top: 2px solid var(--accent-dim);
}

/* steps */

.steps {
  list-style: none; counter-reset: step;
  margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px;
}
.steps li {
  counter-increment: step;
  background: linear-gradient(175deg, var(--panel-hi), var(--panel) 55%);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 24px;
}
.steps li::before {
  content: counter(step, decimal-leading-zero);
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem; font-weight: 700;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 11px;
  margin-bottom: 14px;
  box-shadow: 0 0 12px rgba(53, 226, 207, 0.12);
}
.steps li p { color: var(--text-dim); font-size: 0.97rem; margin-bottom: 0; }

.steps.steps-compact { grid-template-columns: 1fr; gap: 12px; }
.steps.steps-compact li { display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; padding: 18px 22px; }
.steps.steps-compact li::before { margin-bottom: 0; align-self: start; margin-top: 2px; }
.steps.steps-compact li h3 { grid-column: 2; margin-bottom: 2px; }
.steps.steps-compact li p { grid-column: 2; }

/* CTA band */

.cta-band {
  margin: 30px 0 0;
  padding: 64px 0;
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(700px 300px at 50% 0%, rgba(53, 226, 207, 0.10), transparent 70%),
    var(--bg-soft);
  text-align: center;
}
.cta-inner .cta-row { justify-content: center; }
.cta-band p { color: var(--text-dim); }

/* ---------- pricing ---------- */

.pricing-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px; align-items: stretch;
}

.price-card {
  position: relative;
  display: flex; flex-direction: column;
  background: linear-gradient(175deg, var(--panel-hi), var(--panel) 60%);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 28px;
}
.price-card h2 { font-size: 1.2rem; }
.price-card .btn { margin-top: auto; }

.price-card.featured {
  border-color: var(--line);
  box-shadow: 0 0 40px rgba(53, 226, 207, 0.10);
}

.flag {
  position: absolute; top: -13px; right: 20px;
  background: linear-gradient(160deg, var(--accent-hi), var(--accent));
  color: #032420;
  font-size: 0.78rem; font-weight: 700;
  padding: 4px 12px; border-radius: 999px;
  box-shadow: 0 0 16px var(--glow);
}

.price { margin: 4px 0 2px; }
.price .amount { font-size: 2.5rem; font-weight: 760; letter-spacing: -0.02em; }
.price .per { color: var(--text-dim); font-size: 0.98rem; margin-left: 4px; }
.price-note { color: var(--text-dim); font-size: 0.88rem; }

.checklist { list-style: none; margin: 14px 0 22px; padding: 0; }
.checklist li {
  position: relative;
  padding: 5px 0 5px 26px;
  color: var(--text-dim);
  font-size: 0.96rem;
}
.checklist li::before {
  content: "✓";
  position: absolute; left: 2px; top: 5px;
  color: var(--accent);
  font-weight: 700;
}

.seat-row { display: flex; align-items: center; gap: 12px; margin: 0 0 14px; }
.seat-row label { color: var(--text-dim); font-size: 0.95rem; }
.seat-row input { width: 90px; }

.card-footnote { font-size: 0.88rem; margin: 12px 0 0; }

/* FAQ */

details {
  border-bottom: 1px solid var(--line-soft);
  padding: 6px 2px;
}
details summary {
  cursor: pointer;
  font-weight: 640;
  padding: 12px 0;
  list-style: none;
  position: relative;
  padding-right: 34px;
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: "+";
  position: absolute; right: 8px; top: 8px;
  color: var(--accent);
  font-size: 1.3rem; font-weight: 400;
}
details[open] summary::after { content: "–"; }
details p { color: var(--text-dim); margin: 0 0 16px; }

/* ---------- forms ---------- */

.form { margin: 8px 0 22px; }

.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 0.88rem; font-weight: 620;
  color: var(--text-dim);
  margin-bottom: 6px;
}

input, textarea, select {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: rgba(4, 8, 11, 0.6);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
}
input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px rgba(53, 226, 207, 0.14);
}
textarea { resize: vertical; }

.status {
  margin: 14px 0 0;
  padding: 11px 15px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background: var(--panel);
  font-size: 0.95rem;
}
.status.is-ok { border-color: rgba(67, 223, 160, 0.4); color: var(--ok); }
.status.is-error { border-color: rgba(255, 122, 118, 0.4); color: var(--err); }

/* ---------- account ---------- */

.account-card { margin-bottom: 18px; }

.kv { margin: 0; display: grid; gap: 10px; }
.kv > div {
  display: grid; grid-template-columns: 130px 1fr; gap: 12px;
  align-items: baseline;
}
.kv dt { color: var(--text-dim); font-size: 0.92rem; }
.kv dd { margin: 0; }

.badge {
  display: inline-block;
  padding: 2px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.85rem; font-weight: 640;
  color: var(--accent-hi);
  background: rgba(53, 226, 207, 0.07);
}
.badge.is-inactive { color: var(--err); border-color: rgba(255, 122, 118, 0.4); background: rgba(255, 122, 118, 0.06); }

.device-list { list-style: none; margin: 12px 0 6px; padding: 0; }
.device-list li {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 4px;
  border-top: 1px solid var(--line-soft);
}
.device-list .device-name { font-weight: 620; }
.device-list .device-id { color: var(--text-dim); font-family: var(--mono); font-size: 0.8rem; }
.device-list .btn { margin-left: auto; }
.device-list .empty { color: var(--text-dim); border-top: none; }

.account-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 22px 0 4px; }

/* ---------- download ---------- */

.download-ready { margin: 26px 0; padding-bottom: 22px; }
.download-ready h2 { font-size: 1.15rem; }

/* ---------- docs & prose ---------- */

.docs-body h2 { margin-top: 40px; }
.docs-body h2:first-child { margin-top: 0; }
.docs-body h3 { margin-top: 28px; color: var(--accent-hi); }

pre {
  background: #030608;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.87rem;
  line-height: 1.55;
}
code { font-family: var(--mono); font-size: 0.92em; color: var(--accent-hi); }
pre code { color: var(--text); }

.docs-grid .card h3 a { color: inherit; }

.prose { padding: 26px 0 60px; }
.prose h1 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
.prose h2 { font-size: 1.22rem; margin-top: 38px; }
.prose p, .prose li { color: var(--text-dim); }
.prose ul { padding-left: 22px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--text); }

/* ---------- footer ---------- */

.site-footer {
  margin-top: 70px;
  border-top: 1px solid var(--line-soft);
  background: rgba(3, 6, 8, 0.7);
  padding: 48px 0 30px;
  font-size: 0.94rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: 30px;
}

.footer-logo { display: flex; align-items: center; gap: 9px; font-size: 1.05rem; margin-bottom: 10px; }
.footer-about p { font-size: 0.9rem; }

.footer-col h3 {
  font-size: 0.78rem; font-weight: 680;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.footer-col a { display: block; color: var(--text-dim); padding: 3px 0; }
.footer-col a:hover { color: var(--accent-hi); text-decoration: none; }

.footer-bottom {
  margin-top: 36px; padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  color: var(--text-dim); font-size: 0.85rem;
}
.footer-bottom p { margin: 0; }

/* ---------- compare page ---------- */

.compare-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.compare-table th,
.compare-table td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.compare-table th:first-child,
.compare-table td:first-child { white-space: nowrap; }
/* Long citation URLs must wrap rather than widen the card. */
.compare-table .muted { overflow-wrap: anywhere; }
.compare-table th { color: var(--text-dim); font-weight: 600; }
.compare-table .num { font-variant-numeric: tabular-nums; }
.compare-table tfoot th,
.compare-table tr.total th { color: var(--accent-hi); }

.tag {
  display: inline-block;
  padding: 1px 9px;
  border-radius: 999px;
  font-size: 0.74rem;
  border: 1px solid var(--line);
  color: var(--text-dim);
  white-space: nowrap;
}
.tag.self { border-color: rgba(255, 200, 90, 0.45); color: #f4c465; }
.tag.ours { border-color: rgba(53, 226, 207, 0.5); color: var(--accent-hi); }

.honesty-list { margin: 8px 0 0; padding-left: 20px; }
.honesty-list li { margin: 7px 0; color: var(--text-dim); }

/* ---------- responsive ---------- */

@media (max-width: 940px) {
  .hero-inner { grid-template-columns: 1fr; gap: 30px; }
  .hero-visual { order: -1; }
  .memory-field { width: min(280px, 66vw); }
  .grid-3, .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin-inline: auto; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .container, .container.narrow { width: calc(100% - 36px); }
  .hero { padding-top: 44px; }
  .grid-2, .grid-3, .steps { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .header-cta { display: none; }
  .site-nav { margin-left: 0; }
  .kv > div { grid-template-columns: 1fr; gap: 2px; }
  .device-list li { flex-wrap: wrap; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mf-core, .mf-ring, .mf-dot { animation: none; }
  .btn, .btn:hover { transition: none; transform: none; }
}