/* ─────────────────────────────────────────────────────────────
   Prexi · MAI design-system reskin — global styles
   • Light  — white page, #1C1C1C ink, gray body, hairline grid
   • Dark   — #1A1A1A page, white text, translucent hairlines
   Near-monochrome. Accents (electric blue + persona palette) used
   sparingly. Dark primary buttons. Hairlines + soft shadow + the
   little blue "section-dot" replace Jasper's bold offset blocks.
   ───────────────────────────────────────────────────────────── */

/* ─────────── THEME: light (default) ─────────── */
:root,
[data-theme="light"] {
  --bg:           #FFFFFF;
  --bg-raised:    #F6F6F6;   /* subtle section fill */
  --bg-sunken:    #F5F5F5;   /* muted fill, inputs, toggle track */
  --bg-card:      #FFFFFF;
  --off-white:    #FAFAFA;   /* faux-app inner panels */

  --fg-1:  var(--ink);
  --fg-2:  var(--gray-600);
  --fg-3:  var(--gray-500);
  --fg-4:  var(--gray-400);

  --line:        #E5E5E5;                /* visible hairline / card border */
  --line-strong: #D9D9D9;
  --hair:        rgba(0,0,0,0.05);       /* signature 1px divider */
  --hair-faint:  rgba(0,0,0,0.035);

  --accent-color:       var(--accent);   /* themed accent */
  --accent-color-soft:  rgba(60,95,255,0.10);

  --glass: rgba(255,255,255,0.80);
  --hero-tex-opacity: 0.7;

  color-scheme: light;
}

/* ─────────── THEME: dark ─────────── */
[data-theme="dark"] {
  --bg:           #1A1A1A;
  --bg-raised:    #1F1F1F;
  --bg-sunken:    #232323;
  --bg-card:      #202020;
  --off-white:    #262626;

  --fg-1:  #FFFFFF;
  --fg-2:  rgba(255,255,255,0.66);
  --fg-3:  rgba(255,255,255,0.42);
  --fg-4:  rgba(255,255,255,0.30);

  --line:        rgba(255,255,255,0.12);
  --line-strong: rgba(255,255,255,0.20);
  --hair:        rgba(255,255,255,0.07);
  --hair-faint:  rgba(255,255,255,0.045);

  --accent-color:       var(--accent-bright);
  --accent-color-soft:  rgba(90,120,255,0.16);

  --glass: rgba(26,26,26,0.78);
  --hero-tex-opacity: 0;

  color-scheme: dark;
}

/* always-dark surfaces (final CTA + footer), consistent in both themes */
:root { --cta-bg: #141414; }

/* ─────────── globals ─────────── */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html[data-theme],
html[data-theme] body {
  background: var(--bg);
  color: var(--fg-1);
}
body {
  font-family: var(--font-sans);
  font-size: var(--fs-main);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background var(--dur-base) var(--ease), color var(--dur-base) var(--ease);
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
img, svg, video { display: block; max-width: 100%; }

::selection { background: rgba(60,95,255,0.18); color: inherit; }

/* ─────────── type utilities ─────────── */
.serif,
.serif-italic {
  /* "emphasis" device — MAI has no serif; emphasised phrases read as
     muted light-gray in the same display grotesque (mai.co feature h2). */
  font-family: var(--font-display);
  font-style: normal;
  font-weight: inherit;
  color: var(--fg-3);
  letter-spacing: inherit;
}
.mono { font-family: var(--font-mono); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  color: var(--fg-2);
}
.eyebrow::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background: var(--accent-color);
  flex: 0 0 auto;
}

/* ─────────── layout ─────────── */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 40px;
}
.container-wide {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 40px;
}
.hairline { height: 1px; background: var(--hair); width: 100%; }

/* ─────────── buttons ─────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--dur-base) var(--ease),
              color var(--dur-base) var(--ease),
              box-shadow var(--dur-slow) var(--ease),
              border-color var(--dur-base) var(--ease),
              transform var(--dur-slow) var(--ease);
}
.btn:active { transform: scale(0.985); }
.btn svg { width: 16px; height: 16px; }

/* Primary = dark ink button (canonical MAI CTA) */
.btn-primary {
  background: var(--ink);
  color: rgba(255,255,255,0.85);
  border-color: var(--ink);
}
.btn-primary:hover {
  color: #fff;
  background: #000;
  box-shadow: var(--shadow-lg);
}
.btn-primary:active { background: rgba(0,0,0,0.82); }

/* Dark theme: flip primary to a light button so it reads on dark page */
[data-theme="dark"] .btn-primary {
  background: #FFFFFF;
  color: var(--ink);
  border-color: #FFFFFF;
}
[data-theme="dark"] .btn-primary:hover {
  background: rgba(255,255,255,0.9);
  color: var(--ink);
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
}

/* Secondary / ghost = white + hairline border */
.btn-ghost {
  background: var(--bg-card);
  color: var(--fg-1);
  border-color: var(--line-strong);
}
.btn-ghost:hover {
  background: var(--bg-raised);
  border-color: var(--line-strong);
}

.btn-sm { height: 38px; padding: 0 15px; font-size: 14px; }

/* link with arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--accent-color);
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 14.5px;
  letter-spacing: 0;
  transition: gap var(--dur-fast) var(--ease);
}
.link-arrow .ar { transition: transform var(--dur-fast) var(--ease); }
.link-arrow:hover .ar { transform: translateX(3px); }

/* ─────────── chip ─────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-3);
}

/* ─────────── section spacing ─────────── */
.section { padding: 112px 0; position: relative; }
.section-sm { padding: 56px 0; }
.section-lg { padding: 128px 0; }
.reveal { opacity: 1; }

/* corner section-dot — the little blue blueprint marker */
.dot-tl::after {
  content: "";
  position: absolute;
  top: -5px; left: -5px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent-color);
  z-index: 5;
}

main, header, footer, section { position: relative; z-index: 1; }

/* ─────────── header / nav ─────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--glass);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--hair);
}
.site-header-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 66px;
  padding: 0 40px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--fg-1);
  line-height: 1;
}
.brand-dot {
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--accent-color);
  display: inline-block;
  transform: translateY(-1px);
  margin-left: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14.5px;
  font-weight: 400;
  color: var(--fg-2);
}
.nav a { transition: color var(--dur-fast); cursor: pointer; }
.nav a:hover { color: var(--fg-1); }

/* theme toggle pill */
.theme-pill {
  display: inline-flex;
  position: relative;
  background: var(--bg-sunken);
  border: 1px solid var(--hair);
  border-radius: var(--radius-pill);
  padding: 3px;
  height: 32px;
}
.theme-pill button {
  position: relative;
  z-index: 1;
  background: transparent;
  border: 0;
  color: var(--fg-3);
  padding: 0 12px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-pill);
  transition: color var(--dur-fast);
  white-space: nowrap;
}
.theme-pill button.active { color: var(--fg-1); }
.theme-pill .thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  height: 24px;
  background: var(--bg-card);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-xs);
  transition: transform var(--dur-base) var(--ease),
              width var(--dur-base) var(--ease),
              left var(--dur-base) var(--ease);
}

/* helpers */
.row { display: flex; }
.col { display: flex; flex-direction: column; }
.gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; }
.gap-5 { gap: 20px; } .gap-6 { gap: 24px; } .gap-8 { gap: 32px; }

@media (max-width: 960px) {
  .nav { display: none; }
  .section { padding: 80px 0; }
  .section-lg { padding: 96px 0; }
  .container, .container-wide, .site-header-inner { padding-left: 22px; padding-right: 22px; }
}