/* Colours, type and spacing follow the MIDAS landing design tokens
   (navy hero, brand blue, cyan accent, Pretendard / IBM Plex Mono, logo). */
:root {
  --blue-50: #EAF1FC;
  --blue-100: #D2E1F8;
  --blue-600: #0F4FB5;
  --blue-700: #0B3F94;
  --blue-800: #0A3175;
  --navy-900: #0A1A2F;
  --navy-800: #0F2440;
  --navy-700: #16314F;
  --cyan-400: #2BA6FF;
  --cyan-500: #0E8FEC;
  --gray-0: #FFFFFF;
  --gray-25: #F8FAFC;
  --gray-50: #F1F4F8;
  --gray-100: #E6EBF1;
  --gray-200: #D4DCE5;
  --gray-300: #B7C2CF;
  --gray-400: #8A98A8;
  --gray-600: #475467;
  --amber-50: #FBF1DC;
  --amber-500: #E8A317;
  --amber-600: #B97D08;

  --brand: var(--blue-600);
  --brand-strong: var(--blue-700);
  --brand-soft: var(--blue-50);
  --text: var(--navy-900);
  --muted: var(--gray-600);
  --faint: var(--gray-400);
  --bg: var(--gray-25);
  --surface: var(--gray-0);
  --surface-2: var(--gray-50);
  --border: var(--gray-100);
  --border-strong: var(--gray-200);
  --code-bg: var(--gray-50);
  --warn-soft: var(--amber-50);
  --warn-border: var(--amber-500);
  --warn-text: var(--amber-600);

  --font-sans: "Pretendard Variable", "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --radius-sm: 5px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-xs: 0 1px 2px rgba(10, 26, 47, .06);
  --shadow-sm: 0 1px 3px rgba(10, 26, 47, .09), 0 1px 2px -1px rgba(10, 26, 47, .06);
  --shadow-md: 0 6px 16px -4px rgba(10, 26, 47, .12), 0 2px 6px -2px rgba(10, 26, 47, .08);
  --shadow-brand: 0 10px 24px -8px rgba(15, 79, 181, .40);
  --header-bg: rgba(255, 255, 255, .86);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --brand: #3D78D6;
    --brand-strong: #6E9DE6;
    --brand-soft: #12284A;
    --text: #E6EBF1;
    --muted: #B7C2CF;
    --faint: #8A98A8;
    --bg: #0A1A2F;
    --surface: #0F2440;
    --surface-2: #16314F;
    --border: #1E3A5C;
    --border-strong: #2A4A70;
    --code-bg: #0B1E36;
    --warn-soft: #2B2410;
    --warn-border: #B97D08;
    --warn-text: #F0C35A;
    --shadow-xs: none;
    --shadow-sm: none;
    --shadow-md: none;
    --header-bg: rgba(10, 26, 47, .86);
  }
}
:root[data-theme="dark"] {
  --brand: #3D78D6;
  --brand-strong: #6E9DE6;
  --brand-soft: #12284A;
  --text: #E6EBF1;
  --muted: #B7C2CF;
  --faint: #8A98A8;
  --bg: #0A1A2F;
  --surface: #0F2440;
  --surface-2: #16314F;
  --border: #1E3A5C;
  --border-strong: #2A4A70;
  --code-bg: #0B1E36;
  --warn-soft: #2B2410;
  --warn-border: #B97D08;
  --warn-text: #F0C35A;
  --shadow-xs: none;
  --shadow-sm: none;
  --shadow-md: none;
  --header-bg: rgba(10, 26, 47, .86);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font-sans);
  word-break: keep-all;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-strong); text-decoration: underline; }
code, pre { font-family: var(--font-mono); font-size: .86em; }
:not(pre) > code { background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .05em .4em; }
p { margin: 0 0 14px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 32px; }
@media (max-width: 640px) { .wrap { padding: 0 16px; } }

/* Header */
header.top {
  position: sticky; top: 0; z-index: 10;
  background: var(--header-bg);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 16px var(--font-mono); color: var(--text); letter-spacing: -.01em; }
.brand:hover { color: var(--text); text-decoration: none; }
.brand .logo { height: 24px; width: auto; display: block; }
.brand-name { padding-left: 10px; border-left: 1px solid var(--border-strong); line-height: 22px; }
footer .brand-name { border-left-color: rgba(255,255,255,.2); }
.top-right { display: flex; align-items: center; gap: 12px; }
nav.links { display: flex; gap: 2px; }
nav.links a { padding: 7px 12px; font-size: 15px; font-weight: 500; color: var(--muted); border-radius: var(--radius-md); }
nav.links a:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
@media (max-width: 900px) { nav.links .hide-sm { display: none; } }
@media (max-width: 420px) { nav.links a { padding: 7px 8px; } .brand .logo { height: 20px; } }

.lang { display: inline-flex; border: 1px solid var(--border-strong); border-radius: var(--radius-md); overflow: hidden; font-size: 13px; flex-shrink: 0; background: var(--surface); }
.lang a { padding: 5px 10px; color: var(--muted); font-weight: 500; }
.lang a:hover { text-decoration: none; color: var(--text); }
.lang a[aria-current="true"] { background: var(--brand); color: #fff; }

/* Hero: navy with a faint grid and a cyan glow */
.hero { background: var(--navy-900); color: #fff; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; opacity: .4;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero::after {
  content: ""; position: absolute; top: -120px; right: -80px; width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(43,166,255,.28), transparent 62%);
}
.hero .wrap { position: relative; z-index: 1; padding-top: 96px; padding-bottom: 88px; }
@media (max-width: 640px) { .hero .wrap { padding-top: 56px; padding-bottom: 56px; } }
.eyebrow { font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--brand); }
.hero .eyebrow { color: var(--cyan-400); }
.hero h1 {
  font-size: clamp(34px, 5.5vw, 56px); font-weight: 800; letter-spacing: -.025em; line-height: 1.15;
  margin: 16px 0 0; max-width: 800px; text-wrap: balance;
}
.hero h1 .hl { color: var(--cyan-400); }
.hero .lead { font-size: 18px; line-height: 1.7; color: var(--gray-300); max-width: 620px; margin: 20px 0 0; text-wrap: pretty; }
.hero .lead strong { color: #fff; }
.badge {
  display: inline-block; margin-top: 18px; font-size: 13px; padding: 4px 12px; border-radius: 999px;
  color: var(--gray-300); border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.06);
}
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 32px; }
.btn {
  display: inline-flex; align-items: center; gap: 9px; height: 50px; padding: 0 22px;
  border-radius: var(--radius-md); font-size: 16px; font-weight: 600; letter-spacing: -.005em;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  transition: background .15s, border-color .15s, transform .15s, box-shadow .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary { background: var(--blue-600); border-color: var(--blue-600); color: #fff; box-shadow: var(--shadow-xs); }
.btn.primary:hover { background: var(--blue-700); border-color: var(--blue-700); color: #fff; box-shadow: var(--shadow-brand); }
.btn.ghost { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.18); color: #fff; }
.btn.ghost:hover { background: rgba(255,255,255,.14); color: #fff; }
.ver { font: 500 13px var(--font-mono); color: var(--gray-400); }

.ai-tip {
  margin-top: 36px; padding: 16px 18px; max-width: 760px;
  border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius-lg);
  background: rgba(255,255,255,.05); font-size: 14px; color: var(--gray-300);
  display: flex; flex-wrap: wrap; gap: 8px 10px; align-items: center;
}
.ai-tip strong { color: #fff; }
.ai-tip code {
  min-width: 0; max-width: 100%; word-break: break-all; color: var(--cyan-400);
  background: rgba(0,0,0,.25); border-color: rgba(255,255,255,.12);
}
.ai-tip span { flex-basis: 100%; color: var(--gray-400); font-size: 13px; }
.copy-inline {
  font: 600 12px var(--font-sans); border: 1px solid rgba(255,255,255,.2); background: rgba(255,255,255,.08);
  color: #fff; border-radius: var(--radius-sm); padding: 3px 10px; cursor: pointer;
}

/* Stats band */
.stats { background: var(--surface); border-bottom: 1px solid var(--border); }
.stats .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding-top: 36px; padding-bottom: 36px; }
@media (max-width: 720px) { .stats .wrap { grid-template-columns: repeat(2, 1fr); } }
.stat b { font: 600 32px/1.1 var(--font-mono); letter-spacing: -.02em; color: var(--text); }
.stat b small { font: 500 14px var(--font-sans); color: var(--faint); margin-left: 4px; }
.stat p { margin: 6px 0 0; font-size: 14px; color: var(--muted); }

/* Sections */
section.block { padding: 80px 0; }
section.block + section.block { border-top: 1px solid var(--border); }
@media (max-width: 640px) { section.block { padding: 56px 0; } }
.head { margin-bottom: 36px; }
.head.center { text-align: center; }
.head h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 800; letter-spacing: -.02em; line-height: 1.25; margin: 10px 0 0; }
.head p { font-size: 16px; color: var(--muted); margin: 12px 0 0; }
.head.center p { margin-left: auto; margin-right: auto; max-width: 620px; }
h3 { font-size: 18px; font-weight: 700; letter-spacing: -.01em; margin: 32px 0 12px; }
.sub { color: var(--muted); font-size: 15px; }

.card {
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  padding: 24px; box-shadow: var(--shadow-xs); transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card .tag {
  display: inline-grid; place-items: center; min-width: 34px; height: 34px; padding: 0 8px;
  border-radius: var(--radius-md); background: var(--brand-soft); color: var(--brand);
  font: 700 12px var(--font-mono);
}
.card h3 { margin: 16px 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .meta { margin-top: 14px; font: 500 12px var(--font-mono); color: var(--faint); letter-spacing: .02em; }

.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 15px; }
.flow .node { background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-md); padding: 10px 14px; box-shadow: var(--shadow-xs); }
.flow .node b { font-family: var(--font-mono); font-weight: 600; color: var(--brand); }
.flow .arrow { color: var(--faint); }

/* Numbered steps, in the reference's "01 / 02" style */
ol.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; display: grid; gap: 14px; }
ol.steps > li {
  counter-increment: s; position: relative; padding: 20px 22px 20px 76px;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
}
ol.steps > li::before {
  content: counter(s, decimal-leading-zero); position: absolute; left: 24px; top: 20px;
  font: 600 15px var(--font-mono); color: var(--brand);
}
ol.steps strong { display: block; margin-bottom: 4px; font-size: 16px; }
ol.steps p { margin: 0; color: var(--muted); font-size: 15px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border-strong); border-radius: var(--radius-lg); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--surface-2); font-weight: 600; font-size: 14px; color: var(--muted); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }

.note { border-left: 3px solid var(--warn-border); background: var(--warn-soft); padding: 14px 18px; border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: 20px 0 0; font-size: 15px; }
.note p:last-child { margin: 0; }

.two { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 860px) { .two { grid-template-columns: 1fr; gap: 32px; } }

/* The chat sample sits in a navy panel, like the reference's screenshot area */
.chat-panel {
  background: var(--navy-900); border-radius: var(--radius-xl); padding: 24px; position: relative; overflow: hidden;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.chat { display: grid; gap: 10px; }
.bubble { padding: 11px 15px; border-radius: 14px; font-size: 15px; max-width: 88%; }
.bubble.user { justify-self: end; background: var(--blue-600); color: #fff; border-bottom-right-radius: 4px; }
.bubble.ai { justify-self: start; background: var(--navy-700); color: #E6EBF1; border: 1px solid rgba(255,255,255,.08); border-bottom-left-radius: 4px; }
.bubble.ai b { color: var(--cyan-400); font-weight: 600; }

ul.plain { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
ul.plain li { position: relative; padding-left: 40px; font-size: 15px; color: var(--muted); }
ul.plain li::before { content: attr(data-n); position: absolute; left: 0; top: 1px; font: 600 14px var(--font-mono); color: var(--brand); }
ul.plain li strong { color: var(--text); }

.code { position: relative; }
.code pre { margin: 0; background: var(--navy-900); color: #DCE6F2; border-radius: var(--radius-lg); padding: 16px 18px; overflow-x: auto; line-height: 1.6; }
.copy {
  position: absolute; top: 10px; right: 10px; font: 600 12px var(--font-sans);
  border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.08); color: #DCE6F2;
  border-radius: var(--radius-sm); padding: 3px 10px; cursor: pointer;
}
.copy:hover { background: rgba(255,255,255,.16); }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border-strong); margin-bottom: 16px; overflow-x: auto; }
.tabs button {
  font: 500 15px var(--font-sans); background: none; border: 0; border-bottom: 2px solid transparent;
  padding: 10px 14px; color: var(--muted); cursor: pointer; white-space: nowrap; margin-bottom: -1px;
}
.tabs button[aria-selected="true"] { color: var(--brand); border-bottom-color: var(--brand); font-weight: 600; }
.panel[hidden] { display: none; }

.kind { font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; white-space: nowrap; }
.kind.read { background: var(--brand-soft); color: var(--brand); }
.kind.write { background: var(--warn-soft); color: var(--warn-text); }

/* Closing call to action: the reference's blue band */
.cta-band {
  background: var(--blue-600); color: #fff; border-radius: var(--radius-xl); padding: 56px 32px; text-align: center;
  position: relative; overflow: hidden;
}
.cta-band::after {
  content: ""; position: absolute; top: -140px; right: -100px; width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(110,157,230,.55), transparent 62%);
}
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; letter-spacing: -.02em; margin: 0; }
.cta-band p { color: var(--blue-100); margin: 12px 0 0; }
.cta-band .cta { justify-content: center; }
.cta-band .btn.light { background: #fff; border-color: #fff; color: var(--blue-700); }
.cta-band .btn.light:hover { color: var(--blue-800); box-shadow: 0 10px 24px -8px rgba(0,0,0,.35); }

footer { background: var(--navy-900); color: var(--gray-400); padding: 44px 0 52px; font-size: 14px; }
footer .wrap { display: grid; gap: 14px; }
footer .brand { color: #fff; }
footer a { color: var(--gray-300); }
footer a:hover { color: #fff; }
footer p { margin: 0; }