/* ============================================================
   NodeMail — marketing site
   Dark glassmorphism, echoing the app's design tokens.
   ============================================================ */

/* ---------- Theme tokens (mirrors the app's --bm-* vars) ---------- */
:root {
  --accent: #6366f1;          /* indigo-500, themeable */
  --accent-300: #a5b4fc;
  --accent-400: #818cf8;
  --accent-600: #4f46e5;

  --bg: #0b0f17;              /* base */
  --bg-tint: #15213b;        /* gradient center */

  --text: #e6e9f0;
  --text-dim: #9aa6bd;       /* slate-400-ish */
  --text-dimmer: #6b7689;    /* slate-500-ish */

  --surface: rgba(15, 23, 42, 0.62);
  --surface-2: rgba(15, 23, 42, 0.9);
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.16);

  /* participant lane colors (from the app) */
  --lane-1: #818cf8;
  --lane-2: #34d399;
  --lane-3: #f472b6;
  --lane-4: #fbbf24;
  --lane-5: #22d3ee;
  --chrono: #64748b;

  --radius: 16px;
  --node-radius: 12px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background-color: var(--bg);
  background-image: radial-gradient(120% 120% at 78% -12%, var(--bg-tint) 0%, var(--bg) 55%);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease);
}

h1, h2, h3, h4 { margin: 0; line-height: 1.12; letter-spacing: -0.02em; font-weight: 700; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.08em 0.4em;
  color: var(--accent-300);
}
::selection { background: color-mix(in srgb, var(--accent) 45%, transparent); color: #fff; }

/* themed scrollbars (matches the app) */
* { scrollbar-width: thin; scrollbar-color: color-mix(in srgb, var(--accent) 45%, transparent) transparent; }
*::-webkit-scrollbar { width: 11px; height: 11px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 9999px;
  border: 3px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--accent) 60%, transparent); background-clip: padding-box; }

/* ---------- Shared layout ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 92px 24px;
}
.section__head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section__title { font-size: clamp(1.7rem, 3.6vw, 2.65rem); }
.section__lead { margin-top: 18px; color: var(--text-dim); font-size: 1.06rem; }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-300);
  margin-bottom: 16px;
}
.eyebrow--center { display: block; }

.grad {
  background: linear-gradient(100deg, var(--accent-300), var(--lane-3) 55%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.72em 1.3em;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s var(--ease), background 0.2s, box-shadow 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 24px -8px color-mix(in srgb, var(--accent) 80%, transparent);
}
.btn--primary:hover { background: var(--accent-400); box-shadow: 0 12px 30px -8px color-mix(in srgb, var(--accent) 90%, transparent); }
.btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border);
  color: var(--text);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.09); border-color: var(--border-strong); }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
}
.nav.is-stuck {
  background: rgba(11, 15, 23, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; }
.brand__mark { display: inline-flex; color: var(--accent-400); }
.brand__n1 { fill: var(--lane-1); }
.brand__n2 { fill: var(--lane-2); }
.brand__n3 { fill: var(--lane-3); }
.brand__edges { color: var(--accent-400); }
.brand__name { font-size: 1.2rem; letter-spacing: -0.02em; }
.brand__accent { color: var(--accent-400); }

.nav__links { display: flex; gap: 26px; margin-left: 8px; }
.nav__links a { color: var(--text-dim); font-size: 0.92rem; font-weight: 500; transition: color 0.2s; }
.nav__links a:hover { color: var(--text); }

.nav__right { margin-left: auto; display: flex; align-items: center; gap: 18px; }

/* swatches */
.swatches { display: inline-flex; gap: 7px; }
.swatch {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--s);
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  transition: transform 0.15s var(--ease), box-shadow 0.2s, border-color 0.2s;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12);
}
.swatch:hover { transform: scale(1.18); }
.swatch.is-active { border-color: #fff; box-shadow: 0 0 0 2px color-mix(in srgb, var(--s) 60%, transparent); }
.swatches--lg .swatch { width: 26px; height: 26px; }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) 24px 40px;
  text-align: center;
}
.hero__copy { max-width: 820px; margin: 0 auto; }
.hero__title { font-size: clamp(2.3rem, 6vw, 4.1rem); font-weight: 800; }
.hero__sub {
  margin: 22px auto 0;
  max-width: 640px;
  color: var(--text-dim);
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
}
.hero__cta { margin-top: 32px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero__chips {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 10px 22px;
  justify-content: center;
  flex-wrap: wrap;
  color: var(--text-dimmer);
  font-size: 0.86rem;
}
.hero__chips li { display: flex; align-items: center; gap: 8px; }
.hero__chips li::before { content: "✓"; color: var(--accent-400); font-weight: 700; }

.hero__demo { margin-top: 52px; }
.hero__democaption { margin-top: 16px; color: var(--text-dimmer); font-size: 0.85rem; }

/* ---------- App window mock ---------- */
.appwin {
  max-width: 1080px;
  margin: 0 auto;
  border-radius: 18px;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 40px 120px -40px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
  overflow: hidden;
  text-align: left;
}
.appwin__bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.appwin__dots { display: inline-flex; gap: 7px; }
.appwin__dots i { width: 11px; height: 11px; border-radius: 50%; background: rgba(255, 255, 255, 0.18); }
.appwin__dots i:nth-child(1) { background: #ff5f57; }
.appwin__dots i:nth-child(2) { background: #febc2e; }
.appwin__dots i:nth-child(3) { background: #28c840; }
.appwin__title { font-size: 0.84rem; color: var(--text-dim); }
.appwin__badge {
  margin-left: auto;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-300);
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  padding: 3px 9px;
  border-radius: 999px;
}
.appwin__shell { display: flex; min-height: 460px; }

/* mini sidebar */
.rail {
  width: 168px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.rail__brand { display: flex; align-items: center; gap: 7px; font-weight: 600; font-size: 0.84rem; }

/* account switcher — at the top, like the app */
.rail__accounts { display: flex; gap: 7px; }
.rail__acct {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.66rem;
  font-weight: 700;
  color: #0b0f17;
  background: var(--c);
}
.rail__acct.is-active { box-shadow: 0 0 0 2px var(--accent-300); }
.rail__acct--add { background: rgba(255, 255, 255, 0.08); color: var(--text-dim); }

.rail__compose {
  background: var(--accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
  padding: 7px;
  border-radius: 9px;
}
.rail__sync {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px;
  border-radius: 9px;
}

/* Mail / Contacts / Calendar view tabs */
.rail__views {
  display: flex;
  gap: 2px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 9px;
  padding: 3px;
}
.rail__view {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-dim);
  display: grid;
  place-items: center;
  padding: 5px 0;
  border-radius: 7px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.rail__view:hover { color: var(--text); }
.rail__view.is-active { background: rgba(255, 255, 255, 0.1); color: var(--accent-300); }

.rail__folders { display: flex; flex-direction: column; gap: 2px; }
.rail__folder {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding: 6px 8px;
  border-radius: 8px;
}
.rail__folder b {
  margin-left: auto;
  font-size: 0.66rem;
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  color: var(--accent-300);
  padding: 1px 7px;
  border-radius: 999px;
}
.rail__folder.is-active { background: rgba(255, 255, 255, 0.08); color: var(--text); }

/* footer: add account + settings */
.rail__foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-dimmer);
}
.rail__settings { display: inline-grid; place-items: center; color: var(--text-dimmer); }

/* work area */
.work { flex: 1; position: relative; display: flex; flex-direction: column; min-width: 0; }
.work__toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.seg {
  display: inline-flex;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 9px;
  padding: 3px;
  gap: 2px;
}
.seg--wrap { flex-wrap: wrap; }
.seg__btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 7px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.seg__btn:hover { color: var(--text); }
.seg__btn.is-active { background: rgba(255, 255, 255, 0.12); color: #fff; }

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-dim);
  font: inherit;
  font-size: 0.78rem;
  padding: 5px 11px;
  border-radius: 9px;
  cursor: pointer;
}
.toggle__dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--text-dimmer);
  transition: background 0.2s, box-shadow 0.2s;
}
.toggle[aria-pressed="true"] { color: var(--text); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.toggle[aria-pressed="true"] .toggle__dot { background: var(--accent); box-shadow: 0 0 8px var(--accent); }

.legend { margin-left: auto; display: flex; gap: 14px; font-size: 0.74rem; color: var(--text-dim); }
.legend__item { display: inline-flex; align-items: center; gap: 6px; }
.legend__line { width: 20px; height: 0; border-top-width: 2px; border-top-style: solid; }
.legend__line--reply { border-top-color: var(--accent); }
.legend__line--chrono { border-top-style: dashed; border-top-color: var(--chrono); }

/* graph stage */
.stageviewport {
  position: relative;
  flex: 1;
  overflow: hidden;
  min-height: 360px;
}
.stage { position: absolute; top: 0; left: 0; transform-origin: top left; }
.edges { position: absolute; top: 0; left: 0; overflow: visible; pointer-events: none; }
.stage__hint {
  position: absolute;
  left: 16px; bottom: 12px;
  font-size: 0.74rem;
  color: var(--text-dimmer);
  pointer-events: none;
  transition: opacity 0.3s;
}

/* graph nodes (injected) */
.gnode {
  position: absolute;
  width: 144px;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--node-radius);
  padding: 9px 10px;
  box-shadow: 0 10px 26px -14px rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(6px);
  cursor: pointer;
  transition: transform 0.18s var(--ease), border-color 0.2s, box-shadow 0.2s;
}
.gnode:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.gnode.is-unread { border-color: var(--lane); }
.gnode.is-selected { box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.75), 0 14px 30px -14px rgba(0, 0, 0, 0.9); }
.gnode__row { display: flex; align-items: center; gap: 7px; }
.gnode__avatar {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--lane);
  color: #0b0f17;
  font-size: 0.62rem;
  font-weight: 700;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.gnode__name { font-size: 0.72rem; font-weight: 600; color: var(--text); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gnode__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--lane); box-shadow: 0 0 7px var(--lane); flex-shrink: 0; }
.gnode__time { font-size: 0.62rem; color: var(--text-dimmer); flex-shrink: 0; }
.gnode__subject {
  margin-top: 6px;
  font-size: 0.68rem;
  line-height: 1.35;
  color: var(--text-dim);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.gnode.is-unread .gnode__subject { color: var(--text); font-weight: 600; }
.gnode__join {
  display: inline-block;
  margin-top: 7px;
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--lane);
  background: color-mix(in srgb, var(--lane) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--lane) 32%, transparent);
  padding: 1px 7px;
  border-radius: 999px;
}

/* edges */
.edge { fill: none; stroke-width: 2; transition: stroke-width 0.2s, opacity 0.25s; }
.edge--reply { stroke: var(--accent); }
.edge--chrono { stroke: var(--chrono); stroke-dasharray: 5 5; }
.edge--reply.is-animated { stroke-dasharray: 6 7; animation: marching 0.7s linear infinite; }
.edge.is-dim { opacity: 0.22; }
.edge.is-active { stroke-width: 3.4; filter: drop-shadow(0 0 6px var(--accent)); }
@keyframes marching { to { stroke-dashoffset: -26; } }

/* reading pane preview */
.readpane {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 320px;
  max-width: 85%;
  background: rgba(10, 14, 22, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-left: 1px solid var(--border-strong);
  display: flex;
  flex-direction: column;
  transform: translateX(102%);
  transition: transform 0.32s var(--ease);
  overflow: hidden;
  z-index: 6;
}
.readpane.is-open { transform: translateX(0); }

/* top icon toolbar, mirroring the app's MessageToolbar */
.readpane__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.readpane__label { font-size: 0.8rem; font-weight: 600; color: var(--text); flex-shrink: 0; }
.readpane__tools { display: flex; align-items: center; gap: 1px; margin-left: auto; }
.rp-tool {
  width: 24px; height: 24px;
  display: grid; place-items: center;
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.rp-tool:hover { background: rgba(255, 255, 255, 0.1); color: var(--text); }
.rp-tool--star.is-on { color: #fbbf24; }
.rp-tool--danger:hover { background: rgba(239, 68, 68, 0.15); color: #fca5a5; }
.rp-div { width: 1px; height: 16px; background: var(--border); margin: 0 3px; }
.readpane__close {
  width: 24px; height: 24px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.85rem;
  line-height: 1;
}
.readpane__close:hover { color: #fff; }

.readpane__main { flex: 1; min-height: 0; padding: 16px 18px; overflow-y: auto; }
.readpane__subject { font-size: 1.02rem; font-weight: 700; margin-bottom: 10px; }
.readpane__head { display: flex; align-items: center; gap: 11px; margin-bottom: 8px; }
.readpane__avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--lane-1);
  color: #0b0f17;
  font-weight: 700;
  font-size: 0.8rem;
  display: grid; place-items: center;
  flex-shrink: 0;
}
.readpane__from { font-weight: 600; font-size: 0.9rem; }
.readpane__addr { font-size: 0.76rem; color: var(--text-dimmer); }
.readpane__meta { font-size: 0.74rem; color: var(--text-dimmer); margin-bottom: 12px; }
.readpane__tags { display: flex; align-items: center; gap: 6px; margin-bottom: 16px; }
.rp-tag {
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--c);
  background: color-mix(in srgb, var(--c) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--c) 32%, transparent);
  padding: 2px 9px;
  border-radius: 999px;
}
.rp-tag-add {
  font-size: 0.66rem;
  color: var(--text-dimmer);
  border: 1px dashed var(--border-strong);
  padding: 2px 9px;
  border-radius: 999px;
}
.readpane__body { font-size: 0.86rem; color: var(--text-dim); line-height: 1.65; }
.readpane__body p { margin-bottom: 10px; }

/* ---------- Strip ---------- */
.strip {
  max-width: var(--maxw);
  margin: 60px auto 0;
  padding: 0 24px;
  text-align: center;
}
.strip p { color: var(--text-dimmer); font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; }
.strip__row { margin-top: 18px; display: flex; gap: 14px 30px; justify-content: center; flex-wrap: wrap; }
.strip__item { color: var(--text-dim); font-weight: 600; font-size: 1.02rem; opacity: 0.85; }

/* ---------- Compare ---------- */
.section--compare { padding-top: 100px; }
.compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}
.compare__col {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(10px);
  padding: 22px;
}
.compare__col--new { border-color: color-mix(in srgb, var(--accent) 38%, transparent); box-shadow: 0 0 40px -20px var(--accent); }
.compare__tag { font-size: 0.74rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dimmer); margin-bottom: 16px; }
.compare__tag--accent { color: var(--accent-300); }
.compare__arrow { font-size: 1.6rem; color: var(--text-dimmer); }
.compare__note { margin-top: 16px; font-size: 0.85rem; color: var(--text-dimmer); }
.compare__note--accent { color: var(--accent-300); }

.threadlist { display: flex; flex-direction: column; }
.tl__row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 8px;
  border-bottom: 1px solid var(--border);
  font-size: 0.84rem;
}
.tl__row:last-child { border-bottom: none; }
.tl__row b { font-weight: 600; display: block; color: var(--text); }
.tl__row p { margin: 0; color: var(--text-dimmer); font-size: 0.78rem; }
.tl__row time { margin-left: auto; color: var(--text-dimmer); font-size: 0.72rem; flex-shrink: 0; }
.tl__row div { min-width: 0; }
.tl__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-400); box-shadow: 0 0 8px var(--accent-400); flex-shrink: 0; }
.tl__row--in { padding-left: 26px; }
.tl__row--in::before { content: "↳"; color: var(--text-dimmer); }
.tl__row--in2 { padding-left: 44px; }

.minigraph { display: grid; place-items: center; }
.minigraph__svg { width: 100%; max-width: 340px; height: auto; }
.mg-edge { stroke: var(--accent); }
.mg-edge--chrono { stroke: var(--chrono); stroke-dasharray: 5 5; }
.mg-nodes text { font-size: 11px; font-weight: 700; fill: #0b0f17; text-anchor: middle; dominant-baseline: central; }

/* ---------- Signature feature split ---------- */
.feature-split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 54px;
  align-items: center;
}
.bullets { list-style: none; padding: 0; margin: 28px 0 30px; display: flex; flex-direction: column; gap: 18px; }
.bullets li { display: flex; gap: 14px; }
.bullets__ico {
  flex-shrink: 0;
  width: 30px; height: 30px;
  border-radius: 9px;
  display: grid; place-items: center;
  font-weight: 700;
  color: var(--c);
  background: color-mix(in srgb, var(--c) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--c) 30%, transparent);
}
.bullets li div { color: var(--text-dim); font-size: 0.95rem; }
.bullets li b { color: var(--text); }

.resolve {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(12px);
  padding: 26px;
  box-shadow: 0 30px 80px -40px rgba(0, 0, 0, 0.8);
}
.resolve__title { font-size: 0.78rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dimmer); margin-bottom: 20px; }
.resolve__steps { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 14px; }
.resolve__step {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.resolve__num {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--accent-300);
  font-weight: 700;
  display: grid; place-items: center;
  font-size: 0.85rem;
}
.resolve__step div { flex: 1; }
.resolve__step b { font-size: 0.92rem; }
.resolve__step p { font-size: 0.82rem; color: var(--text-dimmer); margin-top: 2px; }
.resolve__edge {
  flex-shrink: 0;
  font-size: 0.66rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
}
.resolve__edge--reply { color: var(--accent-300); background: color-mix(in srgb, var(--accent) 16%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 34%, transparent); }
.resolve__edge--chrono { color: var(--text-dim); background: rgba(255, 255, 255, 0.04); border: 1px dashed var(--chrono); }
.resolve__foot { margin-top: 18px; font-size: 0.82rem; color: var(--text-dimmer); font-style: italic; }

/* ---------- Feature grid ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.feature {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(10px);
  padding: 26px 24px;
  transition: transform 0.2s var(--ease), border-color 0.2s, background 0.2s;
}
.feature:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 36%, transparent); background: rgba(15, 23, 42, 0.78); }
.feature__icon {
  display: inline-flex;
  width: 46px; height: 46px;
  border-radius: 13px;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  color: var(--accent-300);
  margin-bottom: 18px;
}
.feature__icon svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.feature__title { font-size: 1.12rem; margin-bottom: 9px; }
.feature__desc { color: var(--text-dim); font-size: 0.92rem; }
.feature__desc code { font-size: 0.8em; }

/* ---------- Privacy ---------- */
.section--privacy::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.privacy {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 54px;
  align-items: center;
}
.privacy__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.privacy__item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(10px);
  padding: 22px;
}
.privacy__ico { font-size: 1.5rem; display: block; margin-bottom: 12px; }
.privacy__item h4 { font-size: 1.02rem; margin-bottom: 7px; }
.privacy__item p { font-size: 0.86rem; color: var(--text-dim); }

/* ---------- Theming (interactive) ---------- */
.themer {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 30px;
  border: 1px solid var(--border-strong);
  border-radius: 22px;
  background: var(--surface-2);
  backdrop-filter: blur(20px);
  padding: 32px;
  box-shadow: 0 40px 110px -50px rgba(0, 0, 0, 0.85);
}
.themer__group { margin-bottom: 24px; }
.themer__group > label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 11px;
  letter-spacing: 0.02em;
}
.themer__group > label span { color: var(--accent-300); font-variant-numeric: tabular-nums; }
.themer__note { font-size: 0.8rem; color: var(--text-dimmer); margin-top: 4px; }

.range { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 999px; background: rgba(255, 255, 255, 0.12); outline: none; }
.range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent);
  transition: box-shadow 0.2s;
}
.range::-moz-range-thumb { width: 18px; height: 18px; border: none; border-radius: 50%; background: var(--accent); cursor: pointer; }

.themer__preview {
  border-radius: 16px;
  border: 1px solid var(--border);
  background: radial-gradient(120% 120% at 80% -10%, color-mix(in srgb, var(--bg-tint) 80%, transparent), transparent 60%), rgba(0, 0, 0, 0.25);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pcard {
  display: flex;
  gap: 11px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border);
  border-radius: var(--node-radius);
  padding: 12px;
}
.pcard--unread { border-color: var(--lane-1); }
.pcard__avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--c); color: #0b0f17; font-weight: 700; font-size: 0.72rem; display: grid; place-items: center; flex-shrink: 0; }
.pcard__body { min-width: 0; flex: 1; }
.pcard__top { display: flex; align-items: center; gap: 7px; font-size: 0.86rem; }
.pcard__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c); box-shadow: 0 0 7px var(--c); margin-left: auto; }
.pcard__body p { font-size: 0.78rem; color: var(--text-dim); margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pcard--unread .pcard__body p { color: var(--text); font-weight: 600; }
.pbtn { margin-top: 4px; background: var(--accent); color: #fff; border: none; padding: 9px; border-radius: 10px; font: inherit; font-weight: 600; font-size: 0.85rem; cursor: pointer; }
.pchips { display: flex; gap: 7px; flex-wrap: wrap; }
.pchips span { font-size: 0.72rem; color: var(--text-dim); border: 1px solid var(--border); padding: 4px 10px; border-radius: 999px; }
.pchips .pchips--on { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent-300); border-color: color-mix(in srgb, var(--accent) 34%, transparent); }

/* ---------- How it works / arch ---------- */
.arch {
  display: grid;
  grid-template-columns: 1fr auto 1.2fr;
  gap: 22px;
  align-items: stretch;
  max-width: 980px;
  margin: 0 auto;
}
.arch__layer {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(10px);
  padding: 24px;
}
.arch__layer--main { border-color: color-mix(in srgb, var(--accent) 32%, transparent); }
.arch__label { font-size: 0.74rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-300); margin-bottom: 12px; }
.arch__layer p { font-size: 0.88rem; color: var(--text-dim); }
.arch__bridge { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; color: var(--text-dimmer); font-size: 0.72rem; text-align: center; }
.arch__bridge span { font-weight: 600; }
.arch__pipe { width: 2px; flex: 1; min-height: 40px; background: linear-gradient(var(--accent), transparent); }
.arch__providers { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.prov { font-size: 0.74rem; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border); color: var(--text-dimmer); }
.prov--on { color: var(--accent-300); background: color-mix(in srgb, var(--accent) 14%, transparent); border-color: color-mix(in srgb, var(--accent) 32%, transparent); }
.prov i { font-style: normal; opacity: 0.6; font-size: 0.9em; }

.stackrow { margin: 40px auto 0; max-width: 980px; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.stackrow__chip {
  font-size: 0.82rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  padding: 7px 15px;
  border-radius: 999px;
}

/* ---------- Download ---------- */
.section--download { text-align: center; }
.download { max-width: 760px; margin: 0 auto; }
.platforms { margin: 36px 0 18px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.platform {
  display: flex;
  align-items: center;
  gap: 13px;
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  background: var(--surface);
  backdrop-filter: blur(10px);
  padding: 16px 22px;
  min-width: 200px;
  transition: transform 0.18s var(--ease), border-color 0.2s, background 0.2s;
}
.platform:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 45%, transparent); background: rgba(15, 23, 42, 0.82); }
.platform__ico { font-size: 1.7rem; line-height: 1; }
.platform__text { text-align: left; display: flex; flex-direction: column; }
.platform__text b { font-size: 1rem; }
.platform__text small { color: var(--text-dimmer); font-size: 0.76rem; }
.download__alt { color: var(--text-dimmer); font-size: 0.86rem; margin-top: 14px; }
.download__alt a { color: var(--accent-300); border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); margin-top: 40px; background: rgba(0, 0, 0, 0.2); }
.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px 24px 28px;
  display: flex;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.footer__brand { display: flex; gap: 14px; align-items: flex-start; }
.footer__brand .brand__mark { color: var(--accent-400); }
.footer__tag { color: var(--text-dimmer); font-size: 0.86rem; margin-top: 4px; max-width: 280px; }
.footer__links { display: flex; gap: 22px; flex-wrap: wrap; align-items: center; }
.footer__links a { color: var(--text-dim); font-size: 0.9rem; transition: color 0.2s; }
.footer__links a:hover { color: var(--text); }
.footer__base {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 24px 32px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--text-dimmer);
  font-size: 0.8rem;
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Get started / setup ---------- */
.link { color: var(--accent-300); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); transition: color 0.2s var(--ease), border-color 0.2s var(--ease); }
.link:hover { color: var(--accent-400); border-color: var(--accent-400); }
.setup { list-style: none; margin: 0 auto; padding: 0; max-width: 760px; display: grid; gap: 14px; counter-reset: setup; }
.setup__step { display: flex; gap: 16px; align-items: flex-start; padding: 18px 20px; border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 16px; background: rgba(15, 23, 42, 0.55); transition: border-color 0.3s var(--ease), transform 0.3s var(--ease); }
.setup__step:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 36%, transparent); }
.setup__num { flex: 0 0 auto; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; font-size: 0.95rem; color: #fff; background: color-mix(in srgb, var(--accent) 30%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent); }
.setup__body { min-width: 0; }
.setup__title { font-size: 1.05rem; margin: 2px 0 5px; }
.setup__body p { color: var(--text-dim); font-size: 0.92rem; line-height: 1.55; margin: 0; }
.setup__note { max-width: 760px; margin: 22px auto 0; text-align: center; color: var(--text-dimmer); font-size: 0.86rem; line-height: 1.6; }

/* Two connection methods (Gmail OAuth / IMAP) inside the setup section. */
.setup__method { max-width: 760px; margin: 0 auto; }
.setup__method + .setup__method { margin-top: 40px; padding-top: 36px; border-top: 1px solid var(--border); }
.setup__methodhead { text-align: center; margin: 0 auto 18px; }
.setup__methodlead { max-width: 620px; margin: 8px auto 0; color: var(--text-dim); font-size: 0.92rem; line-height: 1.6; }

/* Reference table of common IMAP/SMTP servers; scrolls on narrow screens. */
.setup__servers { max-width: 760px; margin: 16px auto 0; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.setup__servers table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.setup__servers th, .setup__servers td { text-align: left; padding: 11px 16px; white-space: nowrap; }
.setup__servers thead th { color: var(--text-dimmer); font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; border-bottom: 1px solid var(--border); }
.setup__servers tbody tr + tr td { border-top: 1px solid rgba(255, 255, 255, 0.06); }
.setup__servers td:first-child { font-weight: 600; color: var(--text); }
.setup__servers code { font-size: 0.9em; color: var(--text-dim); }

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  .nav__links { display: none; }
  .feature-split { grid-template-columns: 1fr; gap: 36px; }
  .privacy { grid-template-columns: 1fr; gap: 32px; }
  .themer { grid-template-columns: 1fr; }
  .arch { grid-template-columns: 1fr; }
  .arch__bridge { flex-direction: row; gap: 12px; }
  .arch__pipe { width: 100%; height: 2px; min-height: 0; background: linear-gradient(90deg, var(--accent), transparent); }
  .compare { grid-template-columns: 1fr; }
  .compare__arrow { transform: rotate(90deg); justify-self: center; }
}
@media (max-width: 720px) {
  .section { padding: 64px 20px; }
  .rail { display: none; }
  .nav__cta { display: none; }
  .readpane { width: 100%; max-width: 100%; }
  .footer__base { flex-direction: column; }
  .privacy__grid { grid-template-columns: 1fr; }
}
@media (max-width: 460px) {
  .swatches .swatch:nth-child(n+4) { display: none; }
  .hero__chips { font-size: 0.8rem; }
}