/* SmartAgri presentation site. System fonts only, no external resources. Light and dark themes follow the system. */
:root {
  --bg: #fbfbfd; --bg-2: #f3f4f1; --surface: rgba(255, 255, 255, 0.78); --surface-solid: #ffffff;
  --fill: rgba(120, 120, 128, 0.1); --fill-2: rgba(120, 120, 128, 0.16);
  --text: #1d1d1f; --text-2: #4b4b50; --text-3: #626268; --hairline: rgba(0, 0, 0, 0.08);
  --accent: #1a7f3c; --accent-strong: #136a31; --accent-2: #1f9e7a; --accent-soft: rgba(30, 150, 70, 0.1); --on-accent: #ffffff;
  --blue: #0062cc; --orange: #a14f00; --red: #c4000f; --gray: #5f5f64;
  --bar: rgba(251, 251, 253, 0.72);
  --shadow-sm: 0 1px 2px rgba(16, 24, 16, 0.04), 0 2px 8px rgba(16, 24, 16, 0.04);
  --shadow: 0 1px 1px rgba(16, 24, 16, 0.03), 0 8px 24px -6px rgba(16, 24, 16, 0.08), 0 30px 60px -20px rgba(16, 24, 16, 0.12);
  --shadow-xl: 0 2px 4px rgba(16, 24, 16, 0.04), 0 24px 48px -12px rgba(16, 24, 16, 0.18), 0 60px 120px -40px rgba(16, 60, 30, 0.28);
  --glow-1: rgba(52, 199, 89, 0.28); --glow-2: rgba(48, 176, 199, 0.22); --glow-3: rgba(175, 222, 120, 0.22);
  --code-bg: #16181a; --code-text: #e8eae6; --code-dim: #9da39d;
  --focus: #0071e3; --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  --display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  --spring: cubic-bezier(0.22, 1.2, 0.36, 1); --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --r-xl: 28px; --r-lg: 22px; --r: 16px; --r-sm: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0d; --bg-2: #111214; --surface: rgba(28, 28, 32, 0.72); --surface-solid: #1c1c1f;
    --fill: rgba(120, 120, 128, 0.2); --fill-2: rgba(120, 120, 128, 0.3);
    --text: #f5f5f7; --text-2: #c9c9ce; --text-3: #a6a6ab; --hairline: rgba(255, 255, 255, 0.09);
    --accent: #34d168; --accent-strong: #62e08b; --accent-2: #3ad2b0; --accent-soft: rgba(52, 209, 104, 0.14); --on-accent: #032311;
    --blue: #5aaeff; --orange: #ffb547; --red: #ff6b63; --gray: #a6a6ab;
    --bar: rgba(16, 16, 18, 0.68);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow: 0 1px 1px rgba(0, 0, 0, 0.4), 0 10px 30px -8px rgba(0, 0, 0, 0.6), 0 30px 60px -24px rgba(0, 0, 0, 0.7);
    --shadow-xl: 0 2px 4px rgba(0, 0, 0, 0.5), 0 30px 60px -12px rgba(0, 0, 0, 0.7), 0 60px 140px -40px rgba(20, 120, 60, 0.35);
    --glow-1: rgba(52, 209, 104, 0.22); --glow-2: rgba(48, 176, 199, 0.18); --glow-3: rgba(120, 200, 90, 0.12);
    --code-bg: #0f1011; --focus: #5aaeff; color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text); overflow-x: hidden;
  font: 17px/1.55 var(--sans); letter-spacing: -0.003em;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility;
}
h1, h2, h3 { font-family: var(--display); margin: 0; }
h1 { font-size: clamp(42px, 8.4vw, 92px); line-height: 1.02; letter-spacing: -0.045em; font-weight: 700; }
h2 { font-size: clamp(32px, 5.4vw, 60px); line-height: 1.05; letter-spacing: -0.038em; font-weight: 700; }
h3 { font-size: 20px; line-height: 1.25; letter-spacing: -0.018em; font-weight: 650; }
p { margin: 0 0 12px; }
a { color: var(--blue); text-underline-offset: 3px; }
img { display: block; max-width: 100%; height: auto; }
[hidden] { display: none !important; }
code { font-family: var(--mono); font-size: 0.86em; background: var(--fill); padding: 1px 6px; border-radius: 6px; overflow-wrap: anywhere; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 10px; }
::selection { background: var(--accent-soft); }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--surface-solid); color: var(--text); padding: 10px 14px; border-radius: 12px; box-shadow: var(--shadow); }
.skip-link:focus { top: 12px; }
.small { font-size: 14px; line-height: 1.5; color: var(--text-3); }
.eyebrow { font-size: 15px; font-weight: 600; letter-spacing: -0.005em; color: var(--accent); margin-bottom: 12px; }

/* ---------------------------------------------------------------- header (vibrancy) */
.site-header {
  position: sticky; top: 0; z-index: 50; background: var(--bar); border-bottom: 1px solid var(--hairline);
  -webkit-backdrop-filter: saturate(180%) blur(22px); backdrop-filter: saturate(180%) blur(22px);
}
.header-inner { max-width: 1180px; margin: 0 auto; padding: 0 20px; height: 56px; display: flex; align-items: center; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--text); text-decoration: none; font-weight: 650; font-size: 17px; letter-spacing: -0.02em; }
.brand img { border-radius: 7px; box-shadow: var(--shadow-sm); }
#main-nav { display: flex; gap: 4px; margin-left: auto; }
#main-nav a { color: var(--text-2); text-decoration: none; font-size: 14px; padding: 6px 12px; border-radius: 999px; transition: background 0.2s var(--ease), color 0.2s var(--ease); }
#main-nav a:hover { color: var(--text); background: var(--fill); }
.header-cta { font-size: 14px; font-weight: 550; text-decoration: none; background: var(--text); color: var(--bg); padding: 7px 15px; border-radius: 999px; white-space: nowrap; transition: transform 0.3s var(--spring); }
.header-cta:hover { transform: translateY(-1px); }
.menu-toggle { display: none; margin-left: auto; border: 1px solid var(--hairline); background: var(--fill); border-radius: 999px; padding: 6px 14px; font-size: 14px; }
@media (max-width: 860px) {
  .menu-toggle { display: inline-block; }
  .header-cta { display: none; }
  #main-nav { display: none; position: absolute; left: 12px; right: 12px; top: 62px; flex-direction: column; gap: 2px; padding: 8px;
    background: var(--surface-solid); border: 1px solid var(--hairline); border-radius: var(--r); box-shadow: var(--shadow-xl); }
  #main-nav.open { display: flex; }
  #main-nav a { padding: 11px 12px; border-radius: 10px; font-size: 16px; }
}

/* ---------------------------------------------------------------- buttons */
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 46px; padding: 0 22px;
  border-radius: 999px; font-size: 16px; font-weight: 600; letter-spacing: -0.01em; text-decoration: none; border: 1px solid transparent;
  transition: transform 0.35s var(--spring), box-shadow 0.25s var(--ease), background 0.2s var(--ease);
}
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0) scale(0.98); }
.button.primary { color: var(--on-accent); background: linear-gradient(180deg, var(--accent-strong), var(--accent)); box-shadow: 0 8px 24px -8px var(--accent), inset 0 1px 0 rgba(255, 255, 255, 0.22); }
@media (prefers-color-scheme: dark) { .button.primary { background: linear-gradient(180deg, var(--accent-strong), var(--accent)); } }
.button.ghost { color: var(--text); background: var(--surface); border-color: var(--hairline); box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); }

/* ---------------------------------------------------------------- layout */
main { overflow-x: clip; }
.section { max-width: 1180px; margin: 0 auto; padding: clamp(72px, 11vw, 136px) 20px 0; }
.section-head { max-width: 760px; margin-bottom: clamp(32px, 5vw, 56px); }
.section-head p:last-child { color: var(--text-2); font-size: clamp(17px, 2vw, 20px); line-height: 1.5; margin-top: 18px; }

/* ---------------------------------------------------------------- hero */
.hero { position: relative; max-width: 1180px; margin: 0 auto; padding: clamp(56px, 10vw, 120px) 20px 0; text-align: center; }
.hero::before {
  content: ""; position: absolute; inset: -80px -20% auto; height: 640px; z-index: -1; pointer-events: none;
  background: radial-gradient(40% 50% at 30% 30%, var(--glow-1), transparent 70%),
              radial-gradient(35% 45% at 72% 22%, var(--glow-2), transparent 70%),
              radial-gradient(30% 40% at 50% 70%, var(--glow-3), transparent 70%);
  filter: blur(20px); opacity: 0.9;
}
.hero-copy { max-width: 900px; margin: 0 auto; }
.pill-eyebrow {
  display: inline-flex; align-items: center; gap: 9px; margin: 0 0 26px; padding: 6px 14px 6px 10px; border-radius: 999px;
  font-size: 14px; font-weight: 550; color: var(--text-2); background: var(--surface); border: 1px solid var(--hairline); box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.gradient-text {
  background: linear-gradient(100deg, var(--accent) 10%, var(--accent-2) 60%, var(--accent) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { max-width: 700px; margin: 26px auto 0; font-size: clamp(18px, 2.3vw, 22px); line-height: 1.5; color: var(--text-2); letter-spacing: -0.012em; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 34px; }
.ask-chips { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 26px auto 0; padding: 0; max-width: 760px; }
.ask-chips li { font-size: 14px; color: var(--text-2); padding: 7px 14px; border-radius: 999px; background: var(--surface); border: 1px solid var(--hairline);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); }
.hero-shot { position: relative; margin: clamp(48px, 7vw, 80px) auto 0; max-width: 1100px; animation: rise-in 1.1s var(--spring) 0.15s both; }
@keyframes rise-in { from { opacity: 0; transform: translateY(40px) scale(0.97); } to { opacity: 1; transform: none; } }
.glow { position: absolute; inset: 8% 6% -6%; z-index: -1; border-radius: 40px; filter: blur(60px); opacity: 0.75;
  background: linear-gradient(120deg, var(--glow-1), var(--glow-2) 55%, var(--glow-3)); }
.hero-shot figcaption { margin-top: 18px; font-size: 13px; color: var(--text-3); }

/* Mac window frame */
.mac-window { border-radius: 16px; overflow: hidden; background: var(--surface-solid); border: 1px solid var(--hairline); box-shadow: var(--shadow-xl); text-align: left; }
.mac-bar { display: flex; align-items: center; height: 38px; padding: 0 14px; border-bottom: 1px solid var(--hairline);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.2)), var(--bg-2); position: relative; }
@media (prefers-color-scheme: dark) { .mac-bar { background: #1f1f22; } }
.lights { display: inline-flex; gap: 8px; }
.lights i { width: 12px; height: 12px; border-radius: 50%; background: #ff5f57; box-shadow: inset 0 0 0 0.5px rgba(0, 0, 0, 0.18); }
.lights i:nth-child(2) { background: #febc2e; }
.lights i:nth-child(3) { background: #28c840; }
.mac-title { position: absolute; left: 50%; transform: translateX(-50%); font-size: 12.5px; font-weight: 550; color: var(--text-3); white-space: nowrap; }
@media (max-width: 520px) { .mac-title { display: none; } .mac-bar { height: 30px; } .lights i { width: 10px; height: 10px; } }

/* screenshot buttons */
.shot-button { position: relative; display: block; width: 100%; padding: 0; border: 0; background: none; text-align: left; border-radius: 0; }
.shot-button img { width: 100%; }
.expand-hint {
  position: absolute; right: 14px; bottom: 14px; font-size: 13px; font-weight: 600; color: #fff; background: rgba(20, 20, 22, 0.62);
  padding: 6px 12px; border-radius: 999px; opacity: 0; transform: translateY(4px); transition: opacity 0.2s var(--ease), transform 0.3s var(--spring);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.shot-button:hover .expand-hint, .shot-button:focus-visible .expand-hint { opacity: 1; transform: none; }

/* ---------------------------------------------------------------- acts */
.act-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.act { position: relative; padding: 26px 24px 22px; border-radius: var(--r-lg); background: var(--surface); border: 1px solid var(--hairline); box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px); overflow: hidden; }
.act::after { content: ""; position: absolute; inset: 0 0 auto; height: 3px; background: var(--c); opacity: 0.9; }
.act .dot { display: block; width: 12px; height: 12px; border-radius: 50%; background: var(--c); box-shadow: 0 0 0 5px color-mix(in srgb, var(--c) 16%, transparent); margin-bottom: 18px; }
.act h3 { margin-bottom: 8px; }
.act p { color: var(--text-2); font-size: 15.5px; margin: 0; }
.act-recommend { --c: var(--accent); }
.act-conditional { --c: var(--blue); }
.act-ask { --c: var(--orange); }
.act-abstain { --c: var(--gray); }
@media (max-width: 960px) { .act-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .act-grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- bento */
.bento { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); grid-auto-rows: minmax(200px, auto); gap: 16px; }
.tile {
  position: relative; display: flex; flex-direction: column; padding: 26px; border-radius: var(--r-xl); overflow: hidden;
  background: var(--surface); border: 1px solid var(--hairline); box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px);
  transition: transform 0.5s var(--spring), box-shadow 0.3s var(--ease);
}
.tile:hover { transform: translateY(-3px); }
.tile h3 { margin-bottom: 8px; font-size: 21px; }
.tile p { color: var(--text-2); font-size: 15.5px; margin: 0; }
.tile .formula { margin-top: auto; padding-top: 18px; }
.tile .formula code { font-size: 15px; padding: 6px 10px; background: var(--accent-soft); color: var(--accent-strong); }
@media (prefers-color-scheme: dark) { .tile .formula code { color: var(--accent); } }
.tile-icon { display: inline-grid; place-items: center; width: 40px; height: 40px; margin-bottom: 18px; border-radius: 12px; font-weight: 700; font-size: 19px;
  color: var(--on-accent); background: linear-gradient(140deg, var(--accent-2), var(--accent)); box-shadow: 0 6px 16px -6px var(--accent); }
.tile-wide { grid-column: span 3; grid-row: span 2; padding-bottom: 0;
  background: linear-gradient(160deg, var(--accent-soft), transparent 45%), var(--surface); }
.tile-tall { grid-column: span 1; grid-row: span 2; padding-bottom: 0; }
.tile-copy { max-width: 560px; margin-bottom: 22px; }
.tile-shot { margin-top: auto; border-radius: 14px 14px 0 0; overflow: hidden; border: 1px solid var(--hairline); border-bottom: 0; box-shadow: var(--shadow); }
.tile-tall .phone { margin: auto auto 0; width: min(100%, 230px); border-radius: 30px 30px 0 0; overflow: hidden; border: 6px solid #1d1d1f; border-bottom: 0; box-shadow: var(--shadow-xl); }
.tile-tall .phone img { aspect-ratio: 390 / 600; object-fit: cover; object-position: top; }
@media (max-width: 960px) {
  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tile-wide { grid-column: span 2; grid-row: auto; }
  .tile-tall { grid-column: span 2; grid-row: auto; }
}
@media (max-width: 560px) {
  .bento { grid-template-columns: 1fr; }
  .tile-wide, .tile-tall { grid-column: auto; }
  .tile { padding: 22px; }
  .ask-chips li { font-size: 13px; padding: 6px 12px; }
}

/* ---------------------------------------------------------------- how it works (flow) */
.flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 12px; position: relative; }
.flow::before { content: ""; position: absolute; left: 4%; right: 4%; top: 31px; height: 2px; border-radius: 2px; z-index: -1;
  background: linear-gradient(90deg, transparent, var(--accent) 12%, var(--accent-2) 88%, transparent); opacity: 0.45; }
.flow li { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; }
.flow .sym {
  display: grid; place-items: center; flex: 0 0 64px; width: 64px; height: 64px; border-radius: 20px; font-family: var(--display); font-size: 28px; font-weight: 600;
  color: var(--accent-strong); background: var(--surface-solid); border: 1px solid var(--hairline); box-shadow: var(--shadow);
}
@media (prefers-color-scheme: dark) { .flow .sym { color: var(--accent); } }
.flow h3 { font-size: 17px; margin-bottom: 6px; }
.flow p { font-size: 14.5px; line-height: 1.5; color: var(--text-2); margin: 0; }
@media (max-width: 1080px) {
  .flow { grid-template-columns: 1fr; gap: 0; max-width: 720px; }
  .flow::before { left: 31px; right: auto; top: 32px; bottom: 32px; width: 2px; height: auto;
    background: linear-gradient(180deg, var(--accent), var(--accent-2)); }
  .flow li { flex-direction: row; gap: 20px; padding: 0 0 26px; }
  .flow li:last-child { padding-bottom: 0; }
  .flow li > div { padding-top: 8px; }
}

/* ---------------------------------------------------------------- interfaces */
.tabs { display: inline-flex; gap: 2px; padding: 4px; border-radius: 999px; background: var(--fill); border: 1px solid var(--hairline); margin-bottom: 22px; max-width: 100%; overflow-x: auto; }
.tabs [role="tab"] { border: 0; background: none; padding: 8px 18px; border-radius: 999px; font-size: 15px; font-weight: 550; color: var(--text-2); white-space: nowrap;
  transition: background 0.25s var(--ease), color 0.2s var(--ease), box-shadow 0.25s var(--ease); }
.tabs [role="tab"][aria-selected="true"] { background: var(--surface-solid); color: var(--text); box-shadow: var(--shadow-sm), 0 0 0 0.5px var(--hairline); }
.panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 28px; align-items: start; padding: clamp(22px, 4vw, 36px);
  border-radius: var(--r-xl); background: var(--surface); border: 1px solid var(--hairline); box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px); animation: panel-in 0.5s var(--spring); }
@keyframes panel-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.panel h3 { font-size: clamp(22px, 3vw, 28px); letter-spacing: -0.025em; margin-bottom: 14px; }
.panel-copy p { color: var(--text-2); }
.panel-aside { padding: 6px 22px; border-radius: var(--r); background: var(--fill); border: 1px solid var(--hairline); }
.spec { margin: 0; }
.spec div { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 12px; padding: 13px 0; border-top: 1px solid var(--hairline); font-size: 15px; }
.spec div:first-child { border-top: 0; }
.spec dt { color: var(--text-3); font-weight: 550; }
.spec dd { margin: 0; color: var(--text); }
.checks { list-style: none; margin: 0; padding: 0; }
.checks li { position: relative; padding: 7px 0 7px 30px; color: var(--text-2); font-size: 16px; }
.checks li::before { content: ""; position: absolute; left: 0; top: 11px; width: 18px; height: 18px; border-radius: 50%; background: var(--accent-soft); }
.checks li::after { content: ""; position: absolute; left: 6px; top: 15px; width: 6px; height: 9px; border: solid var(--accent); border-width: 0 2px 2px 0; transform: rotate(45deg); }
@media (max-width: 860px) { .panel { grid-template-columns: 1fr; } }
@media (max-width: 480px) {
  .tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); width: 100%; }
  .tabs [role="tab"] { padding: 8px 6px; font-size: 14px; }
  .spec div { grid-template-columns: 76px minmax(0, 1fr); }
}

/* code cards (terminal) */
.code-card, .install-card { border-radius: var(--r-lg); overflow: hidden; background: var(--code-bg); color: var(--code-text); box-shadow: var(--shadow-xl); border: 1px solid rgba(255, 255, 255, 0.06); }
.code-head { display: flex; align-items: center; gap: 14px; padding: 12px 16px; font-size: 12.5px; color: var(--code-dim); border-bottom: 1px solid rgba(255, 255, 255, 0.07); background: rgba(255, 255, 255, 0.03); }
.code-head .lights i { width: 11px; height: 11px; }
pre { margin: 0; padding: 20px; overflow-x: auto; font: 13.5px/1.7 var(--mono); }
pre code { background: none; padding: 0; font-size: inherit; color: inherit; overflow-wrap: normal; }
.copy-button { margin-left: auto; border: 1px solid rgba(255, 255, 255, 0.14); background: rgba(255, 255, 255, 0.08); color: #fff; font-size: 13px; font-weight: 550;
  padding: 5px 14px; border-radius: 999px; transition: background 0.2s var(--ease); }
.copy-button:hover { background: rgba(255, 255, 255, 0.16); }

/* ---------------------------------------------------------------- evaluation */
.ladder { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 10px; margin-bottom: 18px; }
.ladder div { padding: 18px 16px; border-radius: var(--r); background: var(--surface); border: 1px solid var(--hairline); box-shadow: var(--shadow-sm); }
.ladder div:last-child { background: linear-gradient(150deg, var(--accent-soft), transparent), var(--surface); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.ladder b { display: block; font-family: var(--display); font-size: 26px; letter-spacing: -0.03em; margin-bottom: 4px; }
.ladder span { font-size: 14px; line-height: 1.4; color: var(--text-2); }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.feature-grid article { padding: 26px; border-radius: var(--r-lg); background: var(--surface); border: 1px solid var(--hairline); box-shadow: var(--shadow); }
.feature-grid h3 { margin-bottom: 8px; }
.feature-grid p { color: var(--text-2); font-size: 15.5px; margin: 0; }
@media (max-width: 960px) { .ladder { grid-template-columns: repeat(3, minmax(0, 1fr)); } .feature-grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .ladder { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ---------------------------------------------------------------- limitations */
.limits-card { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 40px; padding: clamp(26px, 5vw, 52px); border-radius: var(--r-xl);
  background: linear-gradient(150deg, var(--fill), transparent 60%), var(--surface); border: 1px solid var(--hairline); box-shadow: var(--shadow); }
.limits-card h2 { font-size: clamp(28px, 4vw, 42px); }
.limits-card > div { align-self: start; position: sticky; top: 96px; }
@media (max-width: 860px) { .limits-card > div { position: static; } }
.limits-card ul { list-style: none; margin: 0; padding: 0; }
.limits-card li { padding: 13px 0; border-top: 1px solid var(--hairline); color: var(--text-2); font-size: 16px; }
.limits-card li:first-child { border-top: 0; padding-top: 0; }
.limits-card li b { color: var(--text); }
@media (max-width: 860px) { .limits-card { grid-template-columns: 1fr; gap: 18px; } }

/* ---------------------------------------------------------------- get started */
.install-notes { padding: 0 20px 18px; }
.install-notes .small { color: var(--code-dim); }
.install-notes code { background: rgba(255, 255, 255, 0.09); color: var(--code-text); }
.link-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.link-grid a { display: flex; flex-direction: column; gap: 4px; padding: 20px; border-radius: var(--r); text-decoration: none; color: var(--text);
  background: var(--surface); border: 1px solid var(--hairline); box-shadow: var(--shadow-sm); transition: transform 0.45s var(--spring), box-shadow 0.25s var(--ease); }
.link-grid a:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.link-grid b::after { content: " ›"; color: var(--accent); }
.link-grid span { font-size: 14px; color: var(--text-3); }
@media (max-width: 860px) { .link-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 420px) { .link-grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- footer */
.site-footer { margin-top: clamp(80px, 12vw, 140px); border-top: 1px solid var(--hairline); background: var(--bg-2); }
.footer-inner { max-width: 1180px; margin: 0 auto; padding: 32px 20px 40px; font-size: 13px; color: var(--text-3); }
.footer-brand { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--text); font-size: 15px; }
.footer-brand img { border-radius: 6px; }
.footer-brand span { color: var(--text-3); font-size: 13px; margin-left: 6px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 0; }
.footer-links a { color: var(--text-2); text-decoration: none; }
.footer-links a:hover { color: var(--text); text-decoration: underline; }

/* ---------------------------------------------------------------- dialog */
dialog { border: 0; padding: 0; max-width: min(1280px, 94vw); max-height: 92vh; border-radius: 18px; background: var(--surface-solid); color: var(--text); box-shadow: var(--shadow-xl); overflow: auto; }
dialog::backdrop { background: rgba(0, 0, 0, 0.45); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
dialog[open] { animation: sheet-in 0.45s var(--spring); }
@keyframes sheet-in { from { opacity: 0; transform: translateY(14px) scale(0.98); } to { opacity: 1; transform: none; } }
.dialog-top { position: sticky; top: 0; display: flex; align-items: center; gap: 12px; padding: 12px 16px; font-size: 14px; color: var(--text-2);
  background: var(--bar); border-bottom: 1px solid var(--hairline); -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px); }
.dialog-top button { margin-left: auto; border: 0; background: var(--fill-2); padding: 6px 14px; border-radius: 999px; font-size: 14px; font-weight: 550; }
#dialog-image { width: auto; max-width: 100%; margin: 0 auto; }
body.modal-open { overflow: hidden; }

/* ---------------------------------------------------------------- scroll reveal (only when JS runs and motion is allowed) */
.js-reveal .reveal { opacity: 0; transform: translateY(26px) scale(0.985); transition: opacity 0.8s var(--ease), transform 0.9s var(--spring); }
.js-reveal .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js-reveal .reveal { opacity: 1; transform: none; }
}