/* =============================================================================
   BrowBro: website styles
   Ported from the BrowBro Design System (Claude Design project). Tokens are
   copied verbatim from the design system so the site is pixel-faithful to the
   prototype; component + layout styles reproduce the .dc.html surfaces in
   plain HTML/CSS (no framework runtime).
   ============================================================================= */

/* =============================================================================
   TOKENS: colors
   ============================================================================= */
:root {
  --accent:            #2c6bed;
  --accent-hover:      #2359ce;
  --accent-active:     #1e4fb5;
  --accent-weak:       #e8f0fe;
  --accent-fill:       #2c6bed;
  --on-accent:         #ffffff;
  --focus-ring:        rgba(44, 107, 237, 0.45);

  --surface-popover:       rgba(246, 246, 248, 0.72);
  --surface-popover-solid: #f6f6f8;
  --surface-raised:        #ffffff;
  --surface-sunken:        #ededf0;
  --surface-menu:          rgba(244, 244, 246, 0.80);

  --fill-hover:    rgba(0, 0, 0, 0.055);
  --fill-pressed:  rgba(0, 0, 0, 0.09);
  --fill-quiet:    rgba(0, 0, 0, 0.045);
  --fill-disabled: rgba(0, 0, 0, 0.04);

  --separator:      rgba(0, 0, 0, 0.10);
  --border-hairline:rgba(0, 0, 0, 0.12);
  --border-strong:  rgba(0, 0, 0, 0.20);

  --text-primary:    #1d1d1f;
  --text-secondary:  #6e6e73;
  --text-tertiary:   #98989d;
  --text-quaternary: #b8b8bd;
  --text-on-fill:    #1d1d1f;
  --text-disabled:   #b0b0b5;
  --text-link:       var(--accent);

  --icon-primary:   #3a3a3c;
  --icon-secondary: #8e8e93;

  --success: #248a3d;
  --warning: #b25000;
  --danger:  #d70015;
  --success-weak: #e4f6e9;
  --warning-weak: #fdeede;
  --danger-weak:  #fdecec;

  --menubar-glyph:        rgba(0, 0, 0, 0.85);
  --menubar-glyph-active: #ffffff;

  color-scheme: light;

  /* Chrome profile colors: external content, only ever inside a swatch. */
  --chrome-blue:    #4285f4;
  --chrome-cyan:    #12b5cb;
  --chrome-green:   #1e8e3e;
  --chrome-yellow:  #f9ab00;
  --chrome-orange:  #fa7b17;
  --chrome-red:     #d93025;
  --chrome-pink:    #d01884;
  --chrome-purple:  #9334e6;
  --chrome-gray:    #5f6368;
}

:root[data-theme="dark"],
:root[data-theme="dark"] :where(*) { color-scheme: dark; }

:root[data-theme="dark"] {
  --accent:        #6699f5;
  --accent-hover:  #85aff8;
  --accent-active: #5a8cef;
  --accent-weak:   rgba(102, 153, 245, 0.18);
  --accent-fill:   #2c6bed;
  --on-accent:     #ffffff;
  --focus-ring:    rgba(102, 153, 245, 0.55);

  --surface-popover:       rgba(38, 38, 41, 0.72);
  --surface-popover-solid: #262629;
  --surface-raised:        #2e2e31;
  --surface-sunken:        #202022;
  --surface-menu:          rgba(40, 40, 43, 0.82);

  --fill-hover:    rgba(255, 255, 255, 0.08);
  --fill-pressed:  rgba(255, 255, 255, 0.12);
  --fill-quiet:    rgba(255, 255, 255, 0.07);
  --fill-disabled: rgba(255, 255, 255, 0.05);

  --separator:       rgba(255, 255, 255, 0.12);
  --border-hairline: rgba(255, 255, 255, 0.14);
  --border-strong:   rgba(255, 255, 255, 0.24);

  --text-primary:    #f5f5f7;
  --text-secondary:  #a1a1a6;
  --text-tertiary:   #7c7c82;
  --text-quaternary: #5a5a60;
  --text-on-fill:    #f5f5f7;
  --text-disabled:   #5a5a60;

  --icon-primary:   #e5e5ea;
  --icon-secondary: #98989d;

  --success: #30d158;
  --warning: #ff9f0a;
  --danger:  #ff453a;
  --success-weak: rgba(48, 209, 88, 0.18);
  --warning-weak: rgba(255, 159, 10, 0.18);
  --danger-weak:  rgba(255, 69, 58, 0.18);

  --menubar-glyph:        rgba(255, 255, 255, 0.92);
  --menubar-glyph-active: #ffffff;
}

/* =============================================================================
   TOKENS: typography
   ============================================================================= */
:root {
  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, system-ui,
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --weight-regular:  400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;

  --text-2xs:  10px;
  --text-xs:   11px;
  --text-sm:   12px;
  --text-base: 13px;
  --text-md:   14px;
  --text-lg:   15px;
  --text-xl:   17px;
  --text-2xl:  20px;
  --text-3xl:  24px;
  --text-4xl:  28px;

  --leading-tight:  1.2;
  --leading-snug:   1.32;
  --leading-normal: 1.45;

  --tracking-wordmark: -0.02em;
  --tracking-tight:    -0.01em;
  --tracking-normal:   0;
  --tracking-label:    0.04em;
  --tracking-key:      0.01em;

  --type-row:        var(--weight-medium)   var(--text-base)/var(--leading-tight) var(--font-sans);
  --type-row-sub:    var(--weight-regular)  var(--text-sm)/var(--leading-snug)    var(--font-sans);
  --type-label:      var(--weight-semibold) var(--text-xs)/var(--leading-tight)   var(--font-sans);
  --type-title:      var(--weight-semibold) var(--text-xl)/var(--leading-snug)    var(--font-sans);
  --type-headline:   var(--weight-semibold) var(--text-3xl)/var(--leading-tight)  var(--font-sans);
  --type-button:     var(--weight-medium)   var(--text-md)/1 var(--font-sans);
  --type-url:        var(--weight-medium)   var(--text-sm)/var(--leading-snug)    var(--font-mono);
}

/* =============================================================================
   TOKENS: spacing
   ============================================================================= */
:root {
  --space-0:  0px;
  --space-1:  2px;
  --space-2:  4px;
  --space-3:  6px;
  --space-4:  8px;
  --space-5:  10px;
  --space-6:  12px;
  --space-7:  14px;
  --space-8:  16px;
  --space-10: 20px;
  --space-12: 24px;
  --space-16: 32px;
  --space-20: 40px;

  --gap-row:      var(--space-2);
  --pad-row-x:    var(--space-3);
  --pad-row-y:    var(--space-2);
  --pad-popover:  var(--space-2);
  --pad-panel:    var(--space-7);
  --gap-icon:     var(--space-5);
}

/* =============================================================================
   TOKENS: shape, elevation, blur, motion
   ============================================================================= */
:root {
  --radius-xs:   4px;
  --radius-sm:   6px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-pill: 999px;
  --radius-chip: 7px;
  --radius-app-icon: 22.37%;

  --shadow-popover: 0 12px 32px -4px rgba(0, 0, 0, 0.24),
                    0 2px 8px -2px rgba(0, 0, 0, 0.12),
                    0 0 0 0.5px rgba(0, 0, 0, 0.12);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.10),
               0 0 0 0.5px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.16),
               0 0 0 0.5px rgba(0, 0, 0, 0.08);
  --shadow-app-icon: 0 8px 20px -4px rgba(0, 0, 0, 0.32);

  --blur-popover: saturate(180%) blur(30px);
  --blur-menu:    saturate(180%) blur(24px);

  --hairline: 0.5px;

  --ease-out:     cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-in-out:  cubic-bezier(0.4, 0, 0.2, 1);
  --dur-instant:  70ms;
  --dur-fast:     120ms;
  --dur-quick:    90ms;
  --dur-panel:    200ms;
}

:root[data-theme="dark"] {
  --shadow-popover: 0 16px 40px -4px rgba(0, 0, 0, 0.55),
                    0 2px 10px -2px rgba(0, 0, 0, 0.4),
                    0 0 0 0.5px rgba(255, 255, 255, 0.10);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4),
               0 0 0 0.5px rgba(255, 255, 255, 0.08);
  --shadow-md: 0 6px 16px -2px rgba(0, 0, 0, 0.5),
               0 0 0 0.5px rgba(255, 255, 255, 0.10);
  --shadow-app-icon: 0 10px 24px -4px rgba(0, 0, 0, 0.6);
}

/* =============================================================================
   BASE / RESET
   ============================================================================= */
*, *::before, *::after { box-sizing: border-box; }

html {
  background: #f6f7fb;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
html[data-theme="dark"] { background: #121214; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: inherit; }
button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.bb-scene {
  background: radial-gradient(130% 120% at 15% -10%, #d9e4ff 0%, #eaf0fb 42%, #f4f6fb 100%);
}
html[data-theme="dark"] .bb-scene {
  background: radial-gradient(130% 120% at 15% -10%, #1b2540 0%, #171a22 52%, #101012 100%);
}

/* =============================================================================
   ANIMATIONS
   ============================================================================= */
@keyframes bb-pop     { from { opacity: 0; transform: scale(0.965) translateY(4px); } to { opacity: 1; transform: scale(1) translateY(0); } }
@keyframes bb-float   { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }
@keyframes bb-rise    { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes bb-pop-out { to { opacity: 0; transform: scale(0.97); } }
@keyframes bb-win-in  { from { opacity: 0; transform: translateX(-50%) scale(0.14); } 40% { opacity: 1; } to { opacity: 1; transform: translateX(-50%) scale(1); } }
@keyframes bb-win-out { from { opacity: 1; transform: translateX(-50%) scale(1); } to { opacity: 0; transform: translateX(-50%) scale(0.975) translateY(5px); } }
@keyframes bb-loadbar { 0% { width: 0; opacity: 1; } 55% { width: 68%; opacity: 1; } 80% { width: 100%; opacity: 1; } 100% { width: 100%; opacity: 0; } }
@keyframes bb-fadein  { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.bb-float { animation: bb-float 6s var(--ease-in-out) infinite; }

/* Scroll reveal */
.bb-reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out); }
.bb-reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bb-float, .bb-pop { animation: none !important; }
  .bb-demo-body * { animation-duration: 1ms !important; animation-delay: 0ms !important; }
  .bb-reveal { opacity: 1; transform: none; transition: none; }
}

/* =============================================================================
   LAYOUT PRIMITIVES
   ============================================================================= */
.bb-wrap { max-width: 1120px; margin: 0 auto; }
.bb-pad  { padding-left: 28px; padding-right: 28px; }

/* Offset in-page anchors so the sticky 60px nav never covers a section head. */
section[id], #top { scroll-margin-top: 76px; }

.eyebrow {
  font: var(--weight-semibold) var(--text-sm)/1 var(--font-sans);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 {
  margin: 0;
  font: var(--weight-bold) clamp(28px, 3.6vw, 42px)/1.08 var(--font-sans);
  letter-spacing: -0.02em;
}
.section-head p {
  margin: 12px auto 0; max-width: 48ch;
  font: var(--weight-regular) var(--text-md)/1.5 var(--font-sans);
  color: var(--text-secondary);
}
.kbd-hint { font-family: var(--font-mono); color: var(--text-primary); }

/* =============================================================================
   BRAND: Logomark / Wordmark / MenuBarIcon
   ============================================================================= */
.wordmark {
  display: inline-flex; align-items: center;
  color: var(--text-primary);
  font: var(--weight-bold) 22px/1 var(--font-sans);
  letter-spacing: var(--tracking-wordmark);
  gap: 9px;
  text-decoration: none;
}
.wordmark svg { display: block; color: var(--accent); }
.wordmark--lg { font-size: 24px; gap: 10px; }

.menubar-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 20px;
  border-radius: var(--radius-sm);
  color: var(--menubar-glyph);
}

/* =============================================================================
   NAV
   ============================================================================= */
.nav {
  position: sticky; top: 0; z-index: 50; height: 60px;
  background: var(--surface-menu);
  -webkit-backdrop-filter: var(--blur-menu);
  backdrop-filter: var(--blur-menu);
  box-shadow: inset 0 -0.5px 0 var(--separator);
}
.nav__inner {
  max-width: 1120px; margin: 0 auto; height: 100%;
  padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.nav__links { display: flex; align-items: center; gap: 24px; }
.nav__links a {
  font: var(--weight-medium) var(--text-md)/1 var(--font-sans);
  color: var(--text-secondary); text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav__links a:hover { color: var(--text-primary); }
.nav__right { display: flex; align-items: center; gap: 10px; }

.icon-btn {
  width: 34px; height: 34px;
  display: inline-flex; align-items: center; justify-content: center;
  border: none; border-radius: var(--radius-md);
  background: transparent; color: var(--icon-primary); cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--fill-hover); }
.icon-btn .icon-moon { display: none; }
html[data-theme="dark"] .icon-btn .icon-sun { display: none; }
html[data-theme="dark"] .icon-btn .icon-moon { display: inline; }

/* =============================================================================
   BUTTONS
   ============================================================================= */
.btn-accent {
  display: inline-flex; align-items: center; gap: 7px;
  height: 34px; padding: 0 16px;
  border-radius: var(--radius-md);
  background: var(--accent-fill); color: var(--on-accent);
  font: var(--weight-semibold) var(--text-md)/1 var(--font-sans);
  letter-spacing: -0.01em; text-decoration: none;
  box-shadow: var(--shadow-sm); border: none; cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out), transform var(--dur-instant) var(--ease-out);
}
.btn-accent:hover { background: var(--accent-hover); }
.btn-accent:active { transform: scale(0.98); }

.btn-accent--lg {
  height: 54px; padding: 0 28px; gap: 11px;
  border-radius: 14px; font: var(--weight-semibold) 16px/1 var(--font-sans);
  box-shadow: var(--shadow-md);
}
.btn-accent--md { height: 48px; padding: 0 24px; gap: 10px; border-radius: 14px;
  font: var(--weight-semibold) var(--text-md)/1 var(--font-sans); box-shadow: var(--shadow-md); }

.btn-brew {
  display: inline-flex; align-items: center; gap: 12px;
  height: 54px; padding: 0 16px 0 18px; max-width: 100%;
  border-radius: 14px;
  background: var(--surface-raised); color: var(--text-primary);
  border: none; cursor: pointer;
  box-shadow: inset 0 0 0 0.5px var(--border-hairline), var(--shadow-sm);
  transition: background var(--dur-fast) var(--ease-out);
}
.btn-brew:hover { background: var(--fill-hover); }
.btn-brew__cmd {
  font: var(--weight-medium) var(--text-sm)/1 var(--font-mono); white-space: nowrap;
  flex: 1 1 auto; min-width: 0; overflow-x: auto; scrollbar-width: none;
}
.btn-brew__cmd::-webkit-scrollbar { display: none; }
.btn-brew__cmd .dollar { color: var(--text-tertiary); }
.btn-brew__sep { width: 0.5px; height: 22px; background: var(--separator); }
.btn-brew__label {
  font: var(--weight-semibold) var(--text-sm)/1 var(--font-sans);
  color: var(--accent); min-width: 44px; text-align: left;
}

.btn-dark {
  display: inline-flex; align-items: center; gap: 9px;
  height: 44px; padding: 0 20px;
  border-radius: var(--radius-md);
  background: var(--text-primary); color: var(--surface-raised);
  font: var(--weight-semibold) var(--text-md)/1 var(--font-sans);
  text-decoration: none; box-shadow: var(--shadow-sm);
  transition: opacity var(--dur-fast) var(--ease-out);
}
.btn-dark:hover { opacity: 0.88; }

/* =============================================================================
   HERO
   ============================================================================= */
.hero {
  max-width: 1120px; margin: 0 auto;
  padding: 88px 28px 48px;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center;
}
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-pill);
  background: var(--accent-weak); color: var(--accent);
  font: var(--weight-semibold) var(--text-sm)/1 var(--font-sans);
  letter-spacing: 0.02em; white-space: nowrap; margin-bottom: 24px;
}
.hero h1 {
  margin: 0;
  font: var(--weight-bold) clamp(40px, 4.6vw, 60px)/1.03 var(--font-sans);
  letter-spacing: -0.03em;
}
.hero__sub {
  margin: 22px 0 0; max-width: 46ch;
  font: var(--weight-regular) clamp(16px, 1.4vw, 19px)/1.5 var(--font-sans);
  color: var(--text-secondary);
}
.hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 34px; }
.hero__fine { margin: 18px 0 0; font: var(--weight-regular) var(--text-sm)/1 var(--font-sans); color: var(--text-tertiary); }

.scene {
  position: relative; border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md); overflow: hidden;
}
.hero__scene { min-height: 420px; padding: 22px; }

/* faux window */
.mac-window { background: var(--surface-raised); border-radius: 12px; box-shadow: var(--shadow-md); overflow: hidden; }
.mac-titlebar {
  height: 34px; display: flex; align-items: center; gap: 7px; padding: 0 12px;
  box-shadow: inset 0 -0.5px 0 var(--separator);
}
.traffic { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.traffic--r { background: #ff5f57; }
.traffic--y { background: #febc2e; }
.traffic--g { background: #28c840; }

.hero__win { position: absolute; top: 44px; left: 36px; width: 58%; }
.hero__win .body { padding: 16px; }
.skeleton-line { height: 8px; border-radius: 4px; background: var(--fill-quiet); margin-bottom: 10px; }
.hero__win .url { font: var(--weight-medium) var(--text-sm)/1.4 var(--font-mono); color: var(--accent); word-break: break-all; }

.hero__pop { position: absolute; right: 20px; bottom: 20px; width: 300px; max-width: 74%; }

/* cursor hand */
.cursor {
  position: absolute; width: 23px; height: 23px;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.35));
  pointer-events: none;
}

/* =============================================================================
   POPOVER + PICKER PRIMITIVES (TargetRow, KeyCap, UrlHeader, swatches)
   ============================================================================= */
.popover {
  background: var(--surface-popover-solid);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-popover);
  padding: var(--pad-popover);
}
.popover--blur {
  background: var(--surface-popover);
  -webkit-backdrop-filter: var(--blur-popover);
  backdrop-filter: var(--blur-popover);
}
.popover-divider { height: var(--hairline); background: var(--separator); margin: 2px 0; }

.url-header { display: flex; flex-direction: column; gap: 2px; padding: 6px 8px; }
.url-header__url {
  font: var(--type-url); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--text-tertiary);
}
.url-header__url .host { color: var(--text-primary); font-weight: var(--weight-semibold); }
.url-header__from {
  display: flex; align-items: center; gap: 4px;
  font: var(--weight-regular) var(--text-xs)/1.3 var(--font-sans);
  color: var(--text-secondary);
}

.target-row {
  display: flex; align-items: center; gap: 8px;
  padding: var(--pad-row-y) var(--pad-row-x);
  border-radius: var(--radius-sm);
  cursor: pointer; user-select: none;
  background: transparent;
  transition: background var(--dur-instant) var(--ease-out);
}
.target-row:hover:not(.is-selected) { background: var(--fill-hover); }
.target-row.is-selected { background: var(--accent-fill); }
.target-row__lead { display: inline-flex; flex: none; }
.target-row__text { display: flex; flex-direction: column; gap: 1px; min-width: 0; flex: 1; }
.target-row__name {
  font: var(--type-row); color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.target-row__detail {
  font: var(--type-row-sub); color: var(--text-secondary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.target-row.is-selected .target-row__name { color: var(--on-accent); }
.target-row.is-selected .target-row__detail { color: rgba(255,255,255,0.82); }

.keycap {
  display: inline-flex; align-items: center; justify-content: center;
  height: 19px; min-width: 19px; padding: 0 5px;
  border-radius: var(--radius-xs);
  font: var(--weight-semibold) var(--text-xs)/1 var(--font-sans);
  letter-spacing: var(--tracking-key);
  font-variant-numeric: tabular-nums;
  background: var(--fill-quiet); color: var(--text-secondary);
  box-shadow: inset 0 0 0 0.5px var(--border-hairline);
  flex: none;
}
.target-row.is-selected .keycap {
  background: rgba(255,255,255,0.22); color: #ffffff;
  box-shadow: inset 0 0 0 0.5px rgba(255,255,255,0.28);
}

.swatch {
  display: inline-flex; align-items: center; justify-content: center;
  flex: none; border-radius: var(--radius-pill);
  box-shadow: inset 0 0 0 0.5px rgba(0,0,0,0.18);
  font: var(--weight-semibold) 13px/1 var(--font-sans);
  color: #fff;
}
.browser-icon {
  display: inline-flex; align-items: center; justify-content: center;
  flex: none; border-radius: 8px;
  background: var(--surface-sunken); color: var(--text-secondary);
  box-shadow: inset 0 0 0 0.5px var(--border-hairline);
  font: var(--weight-semibold) 14px/1 var(--font-sans);
  overflow: hidden;
}

/* =============================================================================
   SWITCH (macOS toggle)
   ============================================================================= */
.switch {
  position: relative; width: 38px; height: 22px; flex: none;
  border: none; padding: 0; border-radius: var(--radius-pill);
  background: var(--fill-pressed);
  box-shadow: inset 0 0 0 0.5px var(--border-hairline);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out);
}
.switch__knob {
  position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; border-radius: var(--radius-pill);
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.28), 0 0 0 0.5px rgba(0,0,0,0.06);
  transition: left var(--dur-fast) var(--ease-out);
}
.switch[aria-checked="true"] { background: var(--accent-fill); box-shadow: none; }
.switch[aria-checked="true"] .switch__knob { left: 18px; }

/* =============================================================================
   HOW IT WORKS
   ============================================================================= */
.section { max-width: 1120px; margin: 0 auto; }
#how { padding: 72px 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--surface-raised); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: inset 0 0 0 0.5px var(--border-hairline), var(--shadow-sm);
}
.card__top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.card__num { font: var(--weight-bold) var(--text-sm)/1 var(--font-mono); color: var(--text-quaternary); }
.card__icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--accent-weak); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
}
.card h3 { margin: 0 0 8px; font: var(--weight-semibold) var(--text-xl)/1.2 var(--font-sans); letter-spacing: -0.01em; }
.card p  { margin: 0; font: var(--weight-regular) var(--text-md)/1.5 var(--font-sans); color: var(--text-secondary); }

/* =============================================================================
   DEMO
   ============================================================================= */
#demo { padding: 56px 28px 72px; }
.demo-scene { min-height: 640px; }
.demo-menubar {
  height: 28px; display: flex; align-items: center; justify-content: space-between; padding: 0 12px;
  background: var(--surface-menu);
  -webkit-backdrop-filter: var(--blur-menu); backdrop-filter: var(--blur-menu);
  box-shadow: inset 0 -0.5px 0 var(--separator);
}
.demo-menubar__left { display: flex; align-items: center; gap: 16px; font: var(--weight-semibold) var(--text-xs)/1 var(--font-sans); color: var(--text-primary); }
.demo-menubar__left .app { font-weight: var(--weight-bold); }
.demo-menubar__left .menu { color: var(--text-secondary); font-weight: var(--weight-regular); }
.demo-menubar__right { display: flex; align-items: center; gap: 12px; font: var(--weight-medium) var(--text-xs)/1 var(--font-sans); color: var(--text-primary); }

.bb-demo-body { position: relative; padding: 34px; }
.msg-window { width: min(440px, 84%); }
.msg-window .titlebar { height: 38px; padding: 0 14px; }
.msg-window .titlebar .who { margin-left: 8px; font: var(--weight-semibold) var(--text-sm)/1 var(--font-sans); color: var(--text-secondary); }
.msg-window .body { padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.bubble {
  align-self: flex-start; max-width: 88%;
  background: var(--surface-sunken); border-radius: 14px; padding: 10px 14px;
  font: var(--weight-regular) var(--text-md)/1.4 var(--font-sans); color: var(--text-primary);
}
.bubble--first { border-radius: 14px 14px 14px 4px; max-width: 80%; }
.msg-link {
  color: var(--accent); font-family: var(--font-mono); font-size: var(--text-sm);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  cursor: pointer;
}

.bb-demo-anchor { position: absolute; top: 168px; left: 236px; }
.demo-pop { width: 360px; }

.browser-win {
  position: absolute; z-index: 3; top: 52px; left: 50%;
  width: min(620px, 92%); transform-origin: 12% 28%;
  background: var(--surface-raised); border-radius: 12px;
  box-shadow: var(--shadow-popover); overflow: hidden;
}
.browser-win__toolbar {
  position: relative; display: flex; align-items: center; gap: 10px;
  height: 44px; padding: 0 12px; box-shadow: inset 0 -0.5px 0 var(--separator);
}
.browser-win__nav { flex: none; display: flex; align-items: center; gap: 8px; color: var(--text-tertiary); }
.browser-win__omni {
  flex: 1; min-width: 0; display: inline-flex; align-items: center; gap: 7px;
  height: 27px; padding: 0 11px; border-radius: 7px; background: var(--fill-quiet);
}
.browser-win__omni .lock { flex: none; color: var(--text-tertiary); }
.browser-win__omni .u { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font: var(--weight-regular) var(--text-xs)/1 var(--font-mono); }
.browser-win__omni .u .host { color: var(--text-primary); font-weight: var(--weight-medium); }
.browser-win__omni .u .path { color: var(--text-tertiary); }
.browser-win__target { flex: none; display: inline-flex; align-items: center; gap: 7px; }
.browser-win__target .nm { font: var(--weight-semibold) var(--text-xs)/1 var(--font-sans); color: var(--text-secondary); }
.browser-win__loadbar { position: absolute; left: 0; bottom: 0; height: 2px; background: var(--accent); }
.browser-win__page { padding: 16px 18px 20px; }
.video-hero { aspect-ratio: 16 / 9; border-radius: 10px; background: #0d0d10; display: grid; place-items: center; }
.video-hero .play { width: 54px; height: 54px; border-radius: 50%; background: rgba(255,255,255,0.14); display: grid; place-items: center; }

/* =============================================================================
   CUSTOMIZE
   ============================================================================= */
#customize { padding: 24px 28px 72px; }
.grid-2 { display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 48px; align-items: start; }
.grid-2 h2 { margin: 0 0 14px; font: var(--weight-bold) clamp(28px, 3.2vw, 40px)/1.08 var(--font-sans); letter-spacing: -0.02em; }
.lede { margin: 0 0 26px; font: var(--weight-regular) var(--text-md)/1.55 var(--font-sans); color: var(--text-secondary); max-width: 46ch; }
.checklist { display: flex; flex-direction: column; gap: 16px; }
.check-item { display: flex; align-items: flex-start; gap: 12px; }
.check-badge {
  flex: none; width: 22px; height: 22px; margin-top: 1px;
  border-radius: var(--radius-pill); background: var(--accent-weak); color: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
}
.check-item span.txt { font: var(--weight-regular) var(--text-md)/1.45 var(--font-sans); color: var(--text-secondary); }
.check-item span.txt strong { color: var(--text-primary); font-weight: var(--weight-semibold); }

.settings-window {
  background: var(--surface-raised); border-radius: var(--radius-xl);
  box-shadow: inset 0 0 0 0.5px var(--border-hairline), var(--shadow-md); overflow: hidden;
}
.settings-window .titlebar { height: 46px; padding: 0 16px; }
.settings-window .titlebar .traffic { width: 12px; height: 12px; }
.settings-window .titlebar .title { margin-left: 8px; font: var(--weight-semibold) var(--text-md)/1 var(--font-sans); color: var(--text-primary); }
.settings-body { padding: 14px 16px 18px; }
.settings-head { display: flex; align-items: baseline; justify-content: space-between; padding: 0 4px 6px; }
.settings-head .lbl { font: var(--weight-semibold) var(--text-xs)/1 var(--font-sans); text-transform: uppercase; letter-spacing: var(--tracking-label); white-space: nowrap; color: var(--text-tertiary); }
.settings-head .hint { font: var(--weight-regular) var(--text-xs)/1 var(--font-sans); white-space: nowrap; color: var(--text-quaternary); }
.settings-list { background: var(--surface-sunken); border-radius: var(--radius-md); overflow: hidden; }
.settings-row {
  display: flex; align-items: center; gap: 10px; padding: 9px 10px;
  box-shadow: inset 0 -0.5px 0 var(--separator); background: var(--surface-sunken);
}
.settings-row:last-child { box-shadow: none; }
.settings-row.dragging { opacity: 0.5; }
.settings-row.drag-over { box-shadow: inset 0 2px 0 var(--accent), inset 0 -0.5px 0 var(--separator); }
.drag-handle { flex: none; color: var(--icon-secondary); display: inline-flex; cursor: grab; }
.drag-handle:active { cursor: grabbing; }
.settings-row__lead { flex: none; display: inline-flex; }
.settings-row__text { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.settings-row__name { font: var(--weight-medium) var(--text-sm)/1.25 var(--font-sans); color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.settings-row__sub  { font: var(--weight-regular) var(--text-xs)/1.25 var(--font-sans); color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* =============================================================================
   OPEN SOURCE
   ============================================================================= */
#github { padding: 24px 28px 72px; }
.oss {
  background: var(--surface-raised); border-radius: var(--radius-xl);
  box-shadow: inset 0 0 0 0.5px var(--border-hairline), var(--shadow-md);
  overflow: hidden; display: grid; grid-template-columns: 1fr 1fr;
}
.oss__left { padding: 44px; }
.oss__left h2 { margin: 0 0 14px; font: var(--weight-bold) clamp(26px, 3vw, 36px)/1.1 var(--font-sans); letter-spacing: -0.02em; }
.oss__left p { margin: 0 0 24px; font: var(--weight-regular) var(--text-md)/1.55 var(--font-sans); color: var(--text-secondary); max-width: 44ch; }
.oss__left .mono { font-family: var(--font-mono); color: var(--text-primary); }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.chip {
  padding: 5px 12px; border-radius: var(--radius-pill); background: var(--fill-quiet); white-space: nowrap;
  font: var(--weight-medium) var(--text-sm)/1 var(--font-sans); color: var(--text-secondary);
}
.chip--mono { font-family: var(--font-mono); }
.oss__right { background: var(--surface-sunken); padding: 44px; display: flex; align-items: center; }
.terminal { width: 100%; background: #1d1d1f; border-radius: 12px; box-shadow: var(--shadow-md); overflow: hidden; }
.terminal .titlebar { height: 34px; padding: 0 12px; background: rgba(255,255,255,0.05); box-shadow: none; }
.terminal .body { padding: 18px; font: var(--weight-regular) var(--text-sm)/1.9 var(--font-mono); color: #e5e5ea; overflow-x: auto; }
.terminal .comment { color: #7c7c82; }
.terminal .cmd { color: #6699f5; }
.terminal .str { color: #30d158; }
.terminal .spacer { height: 10px; }

/* =============================================================================
   FAQ
   ============================================================================= */
#faq { max-width: 760px; margin: 0 auto; padding: 24px 28px 80px; }
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--surface-raised); border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 0.5px var(--border-hairline), var(--shadow-sm); overflow: hidden;
}
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 20px; background: transparent; border: none; cursor: pointer; text-align: left;
}
.faq-q span.q { font: var(--weight-semibold) var(--text-lg)/1.3 var(--font-sans); color: var(--text-primary); letter-spacing: -0.01em; }
.faq-chevron { flex: none; color: var(--text-tertiary); transition: transform var(--dur-panel) var(--ease-out); transform: rotate(0deg); }
.faq-item.is-open .faq-chevron { transform: rotate(90deg); }
.faq-a { display: none; padding: 0 20px 20px; font: var(--weight-regular) var(--text-md)/1.55 var(--font-sans); color: var(--text-secondary); max-width: 62ch; }
.faq-item.is-open .faq-a { display: block; }

/* =============================================================================
   FOOTER
   ============================================================================= */
.footer { box-shadow: inset 0 0.5px 0 var(--separator); background: var(--surface-raised); }
.footer__inner { max-width: 1120px; margin: 0 auto; padding: 56px 28px; }
.footer__top {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px;
  padding-bottom: 40px; border-bottom: 0.5px solid var(--separator);
}
.footer__brand { max-width: 38ch; }
.footer__brand p { margin: 14px 0 0; font: var(--weight-regular) var(--text-md)/1.5 var(--font-sans); color: var(--text-secondary); }
.footer__bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding-top: 24px; }
.footer__copy { font: var(--weight-regular) var(--text-sm)/1 var(--font-sans); color: var(--text-tertiary); }
.footer__links { display: flex; align-items: center; gap: 22px; }
.footer__links a { font: var(--weight-medium) var(--text-sm)/1 var(--font-sans); color: var(--text-secondary); text-decoration: none; transition: color var(--dur-fast) var(--ease-out); }
.footer__links a:hover { color: var(--text-primary); }

/* =============================================================================
   RESPONSIVE
   ============================================================================= */
/* Grid/flex children default to min-width:auto, which refuses to shrink below
   their content's min-content size and blows out the layout on narrow screens.
   Letting these tracks/items shrink is what keeps the page free of sideways
   scroll on mobile. */
.hero > *,
.grid-2 > *,
.grid-3 > *,
.oss > *,
.footer__top > *,
.hero__actions > * { min-width: 0; }
.btn-brew { min-width: 0; }

/* =============================================================================
   MOBILE NAV MENU
   ============================================================================= */
.nav-burger { display: none; }
.nav-menu   { display: none; }
.nav-burger .icon-close { display: none; }
.nav-burger[aria-expanded="true"] .icon-burger { display: none; }
.nav-burger[aria-expanded="true"] .icon-close  { display: inline; }

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav-burger { display: inline-flex; }
  .nav-menu {
    display: block; position: fixed; left: 0; right: 0; top: 60px; z-index: 49;
    padding: 6px 20px 14px;
    background: var(--surface-menu);
    -webkit-backdrop-filter: var(--blur-menu); backdrop-filter: var(--blur-menu);
    box-shadow: inset 0 -0.5px 0 var(--separator), var(--shadow-md);
    max-height: calc(100dvh - 60px); overflow-y: auto;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity var(--dur-panel) var(--ease-out),
                transform var(--dur-panel) var(--ease-out),
                visibility 0s linear var(--dur-panel);
  }
  .nav-menu.is-open {
    opacity: 1; visibility: visible; transform: none;
    transition: opacity var(--dur-panel) var(--ease-out),
                transform var(--dur-panel) var(--ease-out);
  }
  .nav-menu a {
    display: block; padding: 13px 4px; text-decoration: none;
    color: var(--text-primary);
    font: var(--weight-medium) var(--text-lg)/1 var(--font-sans);
    box-shadow: inset 0 -0.5px 0 var(--separator);
  }
  .nav-menu a:last-child { box-shadow: none; }
  .nav-menu a:active { color: var(--accent); }
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 40px; gap: 36px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .oss { grid-template-columns: 1fr; }
  .bb-pad { padding-left: 20px; padding-right: 20px; }
}
@media (max-width: 600px) {
  /* Compact nav so the wordmark, theme, CTA and burger fit down to 320px. */
  .nav__inner { padding: 0 14px; gap: 8px; }
  .nav__right { gap: 4px; }
  .nav__right .btn-accent { padding: 0 12px; }
  .wordmark { font-size: 20px; }

  /* ID-scoped section padding wins over .bb-pad; bring it down to match. */
  #how, #demo, #customize, #github, #faq { padding-left: 20px; padding-right: 20px; }

  .hero { padding-left: 20px; padding-right: 20px; }
  .hero__scene { min-height: 300px; padding: 16px; }
  .hero__actions { flex-direction: column; align-items: stretch; gap: 12px; }
  .hero__actions .btn-accent--lg { justify-content: center; }
  .btn-brew { width: 100%; }

  .bb-demo-body { padding: 16px; }
  .bb-demo-anchor { left: 12px; right: 12px; top: 82px; }
  .bb-demo-anchor > .demo-pop { width: auto; }
  .bb-panel-pad { padding: 28px; }
  .bb-hide-sm { display: none; }
  .oss__left, .oss__right { padding: 28px; }
}