/* ============================================================
   i2Message landing — warm red-washed identity, echoing the app.
   Palette derived from the app's I2Palette (coral accent over
   warm near-black / near-white surfaces).
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

:root {
  /* Coral accent from AppIcon / AccentColor (Display-P3 0.898,0.322,0.353). */
  --accent: #e8505b;
  --accent-strong: #f26670;
  --accent-ink: #ffffff;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
               "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, "JetBrains Mono", Menlo,
               Consolas, monospace;

  --maxw: 1140px;
  --radius: 16px;
  --radius-sm: 10px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --z-nav: 100;
}

/* ---- Dark (default): warm near-black, red-washed ---- */
:root, :root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1a1517;
  --bg-grad-1: #221a1c;
  --bg-grad-2: #171214;
  --surface: #241d1f;
  --surface-2: #2c2325;
  --surface-3: #342a2c;
  --border: #3a2e31;
  --border-soft: #2f2528;
  --ink: #f6ecee;
  --ink-2: #cbb9bd;
  --ink-3: #9c8a8e;
  --bubble-in: #3a2c2f;
  --bubble-in-ink: #f2e6e8;
  --shadow: 0 30px 80px -30px rgba(0,0,0,0.7), 0 8px 24px -12px rgba(0,0,0,0.5);
  --glow: radial-gradient(60% 60% at 70% 0%, rgba(232,80,91,0.16), transparent 70%);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #fdf8f9;
  --bg-grad-1: #fff6f7;
  --bg-grad-2: #fbeef0;
  --surface: #fffafb;
  --surface-2: #fdf3f4;
  --surface-3: #f8e9eb;
  --border: #efdcdf;
  --border-soft: #f4e6e8;
  --ink: #241a1c;
  --ink-2: #6a565a;
  --ink-3: #93807f;
  --bubble-in: #ecdfe1;
  --bubble-in-ink: #2a2022;
  --shadow: 0 30px 70px -34px rgba(120,40,50,0.28), 0 8px 22px -14px rgba(120,40,50,0.18);
  --glow: radial-gradient(60% 60% at 70% 0%, rgba(232,80,91,0.10), transparent 70%);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    color-scheme: light;
    --bg: #fdf8f9; --bg-grad-1: #fff6f7; --bg-grad-2: #fbeef0;
    --surface: #fffafb; --surface-2: #fdf3f4; --surface-3: #f8e9eb;
    --border: #efdcdf; --border-soft: #f4e6e8;
    --ink: #241a1c; --ink-2: #6a565a; --ink-3: #93807f;
    --bubble-in: #ecdfe1; --bubble-in-ink: #2a2022;
    --shadow: 0 30px 70px -34px rgba(120,40,50,0.28), 0 8px 22px -14px rgba(120,40,50,0.18);
    --glow: radial-gradient(60% 60% at 70% 0%, rgba(232,80,91,0.10), transparent 70%);
  }
}

/* Wide-gamut displays: use the app's exact P3 coral. */
@supports (color: color(display-p3 1 1 1)) {
  :root { --accent: color(display-p3 0.898 0.322 0.353); --accent-strong: color(display-p3 0.95 0.42 0.44); }
}

body {
  font-family: var(--font-sans);
  background:
    var(--glow),
    linear-gradient(180deg, var(--bg-grad-1), var(--bg) 32%, var(--bg-grad-2));
  background-attachment: fixed;
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 17px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; border-radius: 8px; transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---------------- Buttons ---------------- */
.btn {
  --pad-y: 12px; --pad-x: 20px;
  display: inline-flex; align-items: center; gap: 9px;
  padding: var(--pad-y) var(--pad-x);
  border-radius: 12px; font-weight: 600; font-size: 0.98rem;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .18s var(--ease), background .2s var(--ease),
              box-shadow .2s var(--ease), border-color .2s var(--ease);
  white-space: nowrap;
}
.btn svg { flex: 0 0 auto; }
.btn--primary {
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  color: var(--accent-ink);
  box-shadow: 0 10px 26px -10px rgba(232,80,91,0.6), inset 0 1px 0 rgba(255,255,255,0.22);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -10px rgba(232,80,91,0.7), inset 0 1px 0 rgba(255,255,255,0.25); }
.btn--primary:active { transform: translateY(0); }
.btn--ghost { color: var(--ink); border-color: var(--border); background: var(--surface); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-strong); transform: translateY(-2px); }
.btn--small { --pad-y: 8px; --pad-x: 15px; font-size: 0.9rem; }
.btn--lg { --pad-y: 15px; --pad-x: 30px; font-size: 1.06rem; border-radius: 14px; }

/* ---------------- Nav ---------------- */
.nav {
  position: sticky; top: 0; z-index: var(--z-nav);
  display: flex; align-items: center; gap: 24px;
  max-width: var(--maxw); margin: 0 auto;
  padding: 14px clamp(18px, 4vw, 34px);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
}
.nav::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--border-soft);
  -webkit-mask: none;
}
.nav__brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -0.01em; }
.nav__mark { border-radius: 7px; }
.nav__word { font-size: 1.06rem; }
.nav__links { display: flex; gap: 22px; margin-left: auto; font-size: 0.94rem; color: var(--ink-2); }
.nav__links a { transition: color .16s var(--ease); }
.nav__links a:hover { color: var(--ink); }
.nav__actions { display: flex; align-items: center; gap: 12px; }

.theme-toggle {
  display: grid; place-items: center; width: 36px; height: 36px;
  border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--ink-2); cursor: pointer;
  transition: color .2s, border-color .2s, transform .2s var(--ease);
}
.theme-toggle:hover { color: var(--accent-strong); border-color: var(--accent); transform: translateY(-1px); }
.theme-toggle__moon { display: none; }
:root[data-theme="light"] .theme-toggle__sun { display: none; }
:root[data-theme="light"] .theme-toggle__moon { display: block; }

/* ---------------- Layout primitives ---------------- */
main { display: block; }
section { max-width: var(--maxw); margin: 0 auto; padding-inline: clamp(18px, 4vw, 34px); }

h1, h2, h3 { line-height: 1.08; letter-spacing: -0.028em; text-wrap: balance; font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.7rem); }
h3 { letter-spacing: -0.02em; }
p { text-wrap: pretty; }

/* ---------------- Hero ---------------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr); align-items: center;
  gap: clamp(28px, 5vw, 60px);
  padding-top: clamp(40px, 8vh, 96px); padding-bottom: clamp(48px, 9vh, 108px);
}
.hero > * { min-width: 0; } /* let both columns shrink instead of overflowing */
.hero__eyebrow { color: var(--accent-strong); font-weight: 650; font-size: 0.86rem; letter-spacing: 0.01em; margin-bottom: 18px; }
.hero__title {
  font-size: clamp(2.3rem, 5.4vw, 4rem); letter-spacing: -0.04em;
  margin-bottom: 20px; max-width: 15ch;
}
.hero__lede { color: var(--ink-2); font-size: clamp(1.02rem, 1.6vw, 1.2rem); max-width: 52ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero__meta { display: flex; align-items: center; gap: 10px; margin-top: 22px; color: var(--ink-3); font-size: 0.9rem; }
.hero__meta .dot { color: var(--border); }

/* ---- Product mockup window ---- */
.hero__stage { perspective: 1600px; }
.win {
  border-radius: 18px; overflow: hidden; max-width: 100%;
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transform: rotateY(-9deg) rotateX(3.5deg) translateZ(0);
  transform-origin: left center;
  transition: transform .5s var(--ease);
}
.hero__stage:hover .win { transform: rotateY(-4deg) rotateX(2deg); }
@media (prefers-reduced-motion: reduce) { .win { transform: none; } }
.win__bar {
  display: flex; align-items: center; gap: 14px;
  padding: 11px 14px; background: var(--surface-2);
  border-bottom: 1px solid var(--border-soft);
}
.win__lights { display: flex; gap: 7px; }
.l { width: 11px; height: 11px; border-radius: 50%; display: block; }
.l--r { background: #ff5f57; } .l--y { background: #febc2e; } .l--g { background: #28c840; }
.win__search {
  flex: 1; min-width: 0; text-align: left; font-size: 0.74rem; color: var(--ink-3);
  background: var(--surface-3); border-radius: 7px; padding: 5px 11px;
  border: 1px solid var(--border-soft); font-family: var(--font-mono);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.win__body { display: grid; grid-template-columns: 168px minmax(0, 1fr); min-height: 340px; }
.win__side { background: var(--surface-2); border-right: 1px solid var(--border-soft); padding: 8px; display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.conv { display: flex; align-items: center; gap: 8px; padding: 7px 8px; border-radius: 9px; position: relative; }
.conv--active { background: color-mix(in srgb, var(--accent) 15%, transparent); }
.av {
  width: 26px; height: 26px; border-radius: 50%; flex: 0 0 auto;
  display: grid; place-items: center; font-size: 0.64rem; font-weight: 700; color: #fff;
}
.av--a { background: #d9536a; } .av--b { background: #4a7dc4; } .av--c { background: #b2743a; }
.av--d { background: #6a8f4f; } .av--e { background: #8a63c0; }
.conv__meta { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.conv__meta b { font-size: 0.78rem; font-weight: 650; }
.conv__meta small { font-size: 0.68rem; color: var(--ink-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.badge { margin-left: auto; background: var(--accent); color: #fff; font-size: 0.62rem; font-weight: 700; min-width: 17px; height: 17px; border-radius: 9px; display: grid; place-items: center; padding: 0 5px; }
.side__foot { margin-top: auto; padding: 6px 4px 2px; }
.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 0.68rem; font-weight: 650; color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 14%, transparent); padding: 5px 9px; border-radius: 999px; }
.pill__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

.win__main { padding: 16px 18px; display: flex; flex-direction: column; gap: 9px; min-width: 0; }
.bubble { max-width: 76%; padding: 8px 13px; border-radius: 15px; font-size: 0.8rem; line-height: 1.4; overflow-wrap: anywhere; }
.bubble--in { align-self: flex-start; background: var(--bubble-in); color: var(--bubble-in-ink); border-bottom-left-radius: 5px; }
.bubble--out { align-self: flex-end; background: linear-gradient(180deg, var(--accent-strong), var(--accent)); color: #fff; border-bottom-right-radius: 5px; }
.thread-chip {
  align-self: flex-start; display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.68rem; font-weight: 600; color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: 4px 9px 4px 6px; border-radius: 999px;
}
.avx { width: 17px; height: 17px; font-size: 0.5rem; box-shadow: 0 0 0 1.5px var(--surface); }
.thread-chip .avx + .avx { margin-left: -7px; }
.typing { align-self: flex-start; display: inline-flex; gap: 4px; padding: 10px 13px; background: var(--bubble-in); border-radius: 15px; border-bottom-left-radius: 5px; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-3); animation: blink 1.4s infinite ease-in-out both; }
.typing i:nth-child(2) { animation-delay: .2s; } .typing i:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .3; } 40% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .typing i { animation: none; opacity: .6; } }

/* ---------------- Feature lead (search) ---------------- */
.feature-lead {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 60px);
  align-items: center; padding-block: clamp(50px, 9vh, 100px);
  border-top: 1px solid var(--border-soft);
}
.feature-lead > * { min-width: 0; }
.feature-lead h2 { margin-bottom: 18px; max-width: 16ch; }
.feature-lead p { color: var(--ink-2); max-width: 48ch; }
.feature-lead em { color: var(--ink); font-style: italic; }
.ticks { list-style: none; padding: 0; margin-top: 22px; display: grid; gap: 12px; }
.ticks li { position: relative; padding-left: 30px; color: var(--ink-2); font-size: 0.98rem; }
.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: 0; width: 20px; height: 20px;
  display: grid; place-items: center; font-size: 0.72rem; font-weight: 800;
  color: var(--accent-ink); background: var(--accent); border-radius: 50%;
}
.ticks b { color: var(--ink); }

.search-demo {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow); display: grid; gap: 10px;
}
.search-demo__field {
  display: flex; align-items: center; gap: 10px; font-family: var(--font-mono);
  font-size: 0.82rem; color: var(--ink); background: var(--surface-3);
  border: 1px solid var(--border-soft); border-radius: 10px; padding: 11px 13px;
}
.search-demo__field .mag { font-size: 0.66rem; font-weight: 700; color: var(--accent-strong); background: color-mix(in srgb, var(--accent) 15%, transparent); padding: 3px 7px; border-radius: 6px; }
.search-demo__row { display: flex; align-items: center; gap: 10px; font-size: 0.86rem; color: var(--ink-2); padding: 8px 4px; border-bottom: 1px solid var(--border-soft); }
.search-demo__row:last-child { border-bottom: 0; }
.search-demo mark { background: color-mix(in srgb, var(--accent) 28%, transparent); color: var(--ink); border-radius: 4px; padding: 0 3px; }
.tag { font-size: 0.62rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; padding: 3px 7px; border-radius: 6px; flex: 0 0 auto; }
.tag--exact { color: #4a7dc4; background: rgba(74,125,196,0.16); }
.tag--sem { color: var(--accent-strong); background: color-mix(in srgb, var(--accent) 14%, transparent); }

/* ---------------- Feature grid ---------------- */
.grid-section { padding-block: clamp(50px, 9vh, 100px); }
.grid-section__head { text-align: center; max-width: 30ch; margin: 0 auto clamp(34px, 5vw, 54px); }
.grid-section__head p { color: var(--ink-2); margin-top: 12px; }
.fgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.fcard {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 24px; transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.fcard:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); box-shadow: var(--shadow); }
.fcard__ico {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px;
  font-size: 1.25rem; margin-bottom: 16px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent-strong); border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent);
}
.fcard h3 { font-size: 1.12rem; margin-bottom: 8px; }
.fcard p { color: var(--ink-2); font-size: 0.95rem; }

/* ---------------- Shortcuts ---------------- */
kbd {
  font-family: var(--font-mono); font-size: 0.82em; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 1.7em; padding: 0.34em 0.5em;
  background: var(--surface-3); color: var(--ink);
  border: 1px solid var(--border); border-bottom-width: 2px;
  border-radius: 7px; font-weight: 600;
}
.shortcuts { padding-block: clamp(50px, 9vh, 100px); border-top: 1px solid var(--border-soft); }
.shortcuts__head { max-width: 34ch; margin-bottom: clamp(30px, 4vw, 46px); }
.shortcuts__head p { color: var(--ink-2); margin-top: 12px; }
.shortcuts__head kbd { font-size: 0.86rem; }
.scols { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.scol { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 22px 8px; }
.scol h3 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-3); margin-bottom: 14px; }
.scol dl { margin: 0; }
.scol dl > div { display: flex; align-items: baseline; gap: 12px; padding: 11px 0; border-top: 1px solid var(--border-soft); }
.scol dl > div:first-child { border-top: 0; }
.scol dt { display: inline-flex; gap: 4px; flex: 0 0 auto; }
.scol dd { margin: 0; color: var(--ink-2); font-size: 0.92rem; }
.scol dd span { color: var(--ink-3); font-size: 0.82em; }

/* ---------------- Privacy ---------------- */
.privacy { padding-block: clamp(50px, 9vh, 100px); }
.privacy__inner {
  background:
    radial-gradient(120% 140% at 100% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 55%),
    var(--surface);
  border: 1px solid var(--border); border-radius: 22px;
  padding: clamp(30px, 5vw, 56px); box-shadow: var(--shadow);
}
.privacy__inner h2 { max-width: 20ch; margin-bottom: 16px; }
.privacy__inner > p { color: var(--ink-2); max-width: 62ch; font-size: 1.04rem; }
.privacy__facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 34px; }
.privacy__facts div { display: flex; flex-direction: column; gap: 4px; padding-top: 18px; border-top: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); }
.privacy__facts b { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -0.03em; }
.privacy__facts span { color: var(--ink-3); font-size: 0.9rem; }

/* ---------------- Download ---------------- */
.download { padding-block: clamp(40px, 7vh, 90px); }
.download__card {
  text-align: center; max-width: 620px; margin: 0 auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: 24px;
  padding: clamp(34px, 5vw, 56px); box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.download__card::before { content: ""; position: absolute; inset: 0; background: var(--glow); pointer-events: none; }
.download__icon { margin: 0 auto 18px; border-radius: 20px; box-shadow: 0 14px 30px -12px rgba(232,80,91,0.5); position: relative; }
.download__card h2 { max-width: 18ch; margin: 0 auto 12px; position: relative; }
.download__card > p { color: var(--ink-2); max-width: 44ch; margin: 0 auto 26px; position: relative; }
.download__card .btn { position: relative; }
.download__sub { margin-top: 18px; color: var(--ink-3); font-size: 0.9rem; position: relative; }
.download__sub a { color: var(--accent-strong); }
.download__sub a:hover { text-decoration: underline; }

/* ---------------- Footer ---------------- */
.foot {
  max-width: var(--maxw); margin: 0 auto;
  padding: 30px clamp(18px, 4vw, 34px) 48px;
  border-top: 1px solid var(--border-soft);
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.foot__left { display: flex; align-items: center; gap: 9px; font-weight: 650; }
.foot__left img { border-radius: 6px; }
.foot__links { display: flex; gap: 20px; margin-left: auto; color: var(--ink-2); font-size: 0.92rem; flex-wrap: wrap; }
.foot__links a:hover { color: var(--accent-strong); }
.foot__fine { width: 100%; color: var(--ink-3); font-size: 0.84rem; }

/* ---------------- Reveal motion ---------------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); will-change: opacity, transform; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------------- Responsive ---------------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: minmax(0, 1fr); }
  .hero__copy { order: 1; } .hero__stage { order: 2; }
  .win { transform: none; }
  .hero__title { max-width: 20ch; }
  .feature-lead { grid-template-columns: minmax(0, 1fr); }
  .feature-lead__art { order: -1; }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  .nav__links { display: none; }
  .privacy__facts { grid-template-columns: 1fr; gap: 4px; }
  .privacy__facts div { padding-top: 14px; }
  .foot__links { margin-left: 0; }
}
@media (max-width: 500px) {
  .win__side { display: none; }
  .win__body { grid-template-columns: minmax(0, 1fr); }
  .hero__cta { display: grid; grid-template-columns: 1fr; }
  .hero__cta .btn { justify-content: center; }
}