/* Color Marker — site styles (dark + 4-color accent)
   Tokens drawn from app launcher icon (red / cyan / yellow / green). */

:root {
    --bg: #0b0b0d;
    --surface: #15151a;
    --surface-2: #1e1e25;
    --border: #2a2a32;
    --text: #ececef;
    --text-dim: #9a9aa3;
    --text-mute: #6a6a73;

    --c-red: #ff5a5a;
    --c-cyan: #4cc8ff;
    --c-yellow: #ffd24c;
    --c-green: #4cff8a;

    --font-sans: "Inter", -apple-system, "Segoe UI", "Pretendard",
                 "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas",
                 "D2Coding", ui-monospace, monospace;

    --max-width: 1080px;
    --radius: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    min-height: 100vh;
}

a { color: var(--text); text-decoration: none; }
a:hover { color: var(--c-cyan); }

::selection { background: var(--c-yellow); color: #0b0b0d; }

/* ---------- layout ---------- */
.wrap {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 28px;
}

header.site {
    border-bottom: 1px solid var(--border);
    background: rgba(11,11,13,.85);
    backdrop-filter: blur(8px);
    position: sticky; top: 0; z-index: 10;
}
header.site .bar {
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.brand {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: .04em;
    color: var(--text-dim);
}
.brand b { color: var(--text); font-weight: 600; }
.brand .ver {
    margin-left: 10px; padding: 2px 8px;
    border: 1px solid var(--border); border-radius: 999px;
    font-size: 11px; color: var(--text-mute);
}
nav.menu { display: flex; gap: 26px; }
nav.menu a {
    font-size: 14px; color: var(--text-dim);
    font-family: var(--font-mono); letter-spacing: .02em;
}
nav.menu a:hover, nav.menu a.active { color: var(--text); }

footer.site {
    border-top: 1px solid var(--border);
    margin-top: 120px; padding: 40px 0;
    color: var(--text-mute); font-size: 13px;
    font-family: var(--font-mono);
}
footer.site .row {
    display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 16px;
}

/* ---------- hero ---------- */
.hero { padding: 120px 0 80px; }
.eyebrow {
    font-family: var(--font-mono); font-size: 12px;
    letter-spacing: .18em; text-transform: uppercase;
    color: var(--text-mute); margin-bottom: 28px;
}
.hero h1 {
    font-size: clamp(56px, 10vw, 128px);
    line-height: .96; letter-spacing: -.04em;
    font-weight: 800;
    margin-bottom: 36px;
}
.hero h1 .w1 { color: var(--c-red); }
.hero h1 .w2 { color: var(--c-yellow); }
.hero h1 .w3 { color: var(--c-cyan); }
.hero h1 .dot { color: var(--text); }

.hero .lede {
    font-size: 19px; color: var(--text-dim);
    max-width: 620px; line-height: 1.7;
}
.hero .actions { display: flex; gap: 14px; margin-top: 44px; flex-wrap: wrap; }

.btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 22px; border-radius: 10px;
    font-family: var(--font-mono); font-size: 14px; font-weight: 500;
    letter-spacing: .02em;
    transition: transform .15s ease, background .15s ease;
    border: 1px solid var(--border);
    background: var(--surface); color: var(--text);
}
.btn:hover { transform: translateY(-1px); background: var(--surface-2); color: var(--text); }
.btn.primary {
    background: var(--c-green); color: #0b0b0d; border-color: var(--c-green);
}
.btn.primary:hover { background: #6affa0; color: #0b0b0d; }
.btn.ghost { background: transparent; }

/* ---------- color chip strip ---------- */
.chips {
    display: flex; gap: 14px; margin-top: 64px; flex-wrap: wrap;
}
.chip {
    display: flex; flex-direction: column; gap: 6px;
    padding: 16px 18px; border-radius: 12px;
    background: var(--surface); border: 1px solid var(--border);
    min-width: 140px;
}
.chip .sw { width: 100%; height: 38px; border-radius: 6px; }
.chip .hex {
    font-family: var(--font-mono); font-size: 12px;
    color: var(--text-dim); letter-spacing: .06em;
}
.chip .label { font-size: 12px; color: var(--text-mute); }

/* ---------- sections ---------- */
section { padding: 80px 0; }
section h2 {
    font-size: clamp(32px, 4.5vw, 48px); letter-spacing: -.02em;
    margin-bottom: 18px; font-weight: 700;
}
section h2 .accent { color: var(--c-cyan); }
section .sub { color: var(--text-dim); font-size: 17px; max-width: 720px; margin-bottom: 56px; }

.grid-3 {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
@media (max-width: 760px) { .grid-3 { grid-template-columns: 1fr; } }

.card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px;
    transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--surface-2); transform: translateY(-2px); }
.card .badge {
    font-family: var(--font-mono); font-size: 11px;
    letter-spacing: .1em; color: var(--text-mute); margin-bottom: 14px;
    text-transform: uppercase;
}
.card h3 { font-size: 22px; margin-bottom: 12px; letter-spacing: -.01em; }
.card p { color: var(--text-dim); font-size: 15px; line-height: 1.6; }

.card.red    .badge { color: var(--c-red); }
.card.cyan   .badge { color: var(--c-cyan); }
.card.yellow .badge { color: var(--c-yellow); }
.card.green  .badge { color: var(--c-green); }

/* ---------- concept block ---------- */
.concept {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px;
}
.concept .row {
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
}
@media (max-width: 760px) { .concept .row { grid-template-columns: 1fr; } }
.concept h4 {
    font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em;
    text-transform: uppercase; margin-bottom: 14px;
}
.concept .measured h4 { color: var(--c-cyan); }
.concept .perceived h4 { color: var(--c-yellow); }
.concept p { color: var(--text-dim); font-size: 15px; }
.concept .vs {
    font-family: var(--font-mono); color: var(--text-mute);
    text-align: center; margin: 24px 0 12px; font-size: 12px; letter-spacing: .18em;
}

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }
.step { background: var(--surface); border: 1px solid var(--border);
        border-radius: var(--radius); padding: 28px; position: relative; }
.step .num {
    font-family: var(--font-mono); font-size: 12px; color: var(--text-mute);
    letter-spacing: .12em; margin-bottom: 10px;
}
.step h3 { font-size: 19px; margin-bottom: 10px; }
.step p { color: var(--text-dim); font-size: 14px; line-height: 1.6; }

/* ---------- prose pages (privacy / changelog / usage detail) ---------- */
.prose { max-width: 760px; margin: 60px auto 0; padding: 0 28px; }
.prose .meta {
    font-family: var(--font-mono); font-size: 12px; color: var(--text-mute);
    letter-spacing: .1em; margin-bottom: 18px;
}
.prose h1 {
    font-size: clamp(36px, 5vw, 56px); letter-spacing: -.02em;
    margin-bottom: 28px; line-height: 1.1;
}
.prose h2 {
    font-size: 22px; margin: 48px 0 14px;
    border-top: 1px solid var(--border); padding-top: 28px; letter-spacing: -.01em;
}
.prose h3 { font-size: 17px; margin: 28px 0 10px; color: var(--text); }
.prose p { color: var(--text-dim); margin-bottom: 14px; }
.prose ul { color: var(--text-dim); padding-left: 22px; margin-bottom: 14px; }
.prose li { margin-bottom: 6px; }
.prose code {
    font-family: var(--font-mono); font-size: 14px;
    background: var(--surface); border: 1px solid var(--border);
    padding: 1px 8px; border-radius: 6px; color: var(--text);
}
.prose a { color: var(--c-cyan); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- mock device (hero side visual, optional) ---------- */
.mock {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 22px; font-family: var(--font-mono);
    font-size: 13px; line-height: 1.7;
}
.mock .head {
    display: flex; gap: 6px; padding-bottom: 14px; margin-bottom: 14px;
    border-bottom: 1px solid var(--border); align-items: center;
}
.mock .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.mock .dot.r { background: var(--c-red); }
.mock .dot.y { background: var(--c-yellow); }
.mock .dot.g { background: var(--c-green); }
.mock .title { margin-left: 12px; color: var(--text-mute); font-size: 12px; }
.mock .line { color: var(--text-dim); }
.mock .ok { color: var(--c-green); }
.mock .key { color: var(--c-cyan); }
.mock .warn { color: var(--c-yellow); }
.mock .pal { display: flex; gap: 6px; margin-top: 6px; }
.mock .pal span { width: 28px; height: 28px; border-radius: 6px; }

/* ---------- language switch & disabled button (added 2026-06-26) ---------- */
.lang-switch {
    display: inline-flex; align-items: center;
    margin-left: 20px;
    border: 1px solid var(--border); border-radius: 999px;
    padding: 3px; font-family: var(--font-mono); font-size: 11px;
    letter-spacing: .1em;
}
.lang-switch a {
    padding: 4px 12px; border-radius: 999px; color: var(--text-mute);
}
.lang-switch a.active {
    background: var(--text); color: var(--bg);
}
.lang-switch a:hover { color: var(--text); }
.lang-switch a.active:hover { color: var(--bg); }

.btn[aria-disabled="true"],
.btn.disabled {
    background: var(--surface);
    color: var(--text-mute);
    border-color: var(--border);
    cursor: not-allowed;
    pointer-events: none;
    position: relative;
}
.btn.primary[aria-disabled="true"],
.btn.primary.disabled {
    background: var(--surface);
    color: var(--text-mute);
    border-color: var(--border);
}
.btn .pill {
    margin-left: 8px;
    padding: 2px 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 10px; letter-spacing: .14em;
    color: var(--c-yellow);
    text-transform: uppercase;
}

/* compact menu spacing on small screens */
@media (max-width: 760px) {
    header.site .bar { height: auto; padding: 14px 0; flex-wrap: wrap; gap: 12px; }
    nav.menu { gap: 16px; flex-wrap: wrap; }
    .lang-switch { margin-left: 0; }
}