/* Hallmark: native utility / quiet green / product chapters */
:root {
    --zt-page: oklch(99.2% 0.005 145);
    --zt-surface: oklch(100% 0 0);
    --zt-mint: oklch(97% 0.025 145);
    --zt-mint-strong: oklch(93% 0.065 145);
    --zt-green: oklch(49% 0.15 145);
    --zt-green-dark: oklch(36% 0.11 145);
    --zt-green-soft: oklch(84% 0.12 145);
    --zt-cyan: oklch(58% 0.12 203);
    --zt-ink: oklch(23% 0.025 145);
    --zt-muted: oklch(51% 0.028 145);
    --zt-faint: oklch(68% 0.022 145);
    --zt-line: oklch(90% 0.018 145);
    --zt-graphite: oklch(29% 0.018 145);
    --zt-max: 1180px;
    --zt-radius: 14px;
    --zt-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", sans-serif;
    --zt-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body { margin: 0; color: var(--zt-ink); background: var(--zt-page); font-family: var(--zt-body); line-height: 1.65; -webkit-font-smoothing: antialiased; overflow-x: clip; }
a { color: inherit; }
img { display: block; max-width: 100%; }
.zt-wrap { width: min(var(--zt-max), calc(100% - 48px)); margin: 0 auto; }

.zt-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--zt-line); background: oklch(100% 0 0 / .9); backdrop-filter: blur(18px); }
.zt-nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 26px; }
.zt-brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--zt-display); font-size: 19px; font-weight: 720; letter-spacing: -.035em; white-space: nowrap; }
.zt-brand-mark { width: 31px; height: 31px; display: grid; place-items: center; border-radius: 9px; color: var(--zt-surface); background: var(--zt-green); font-size: 15px; font-weight: 780; }
.zt-nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 4px; margin: 0; padding: 0; list-style: none; }
.zt-nav-links a { display: inline-flex; min-height: 38px; align-items: center; padding: 0 12px; border-radius: 8px; color: var(--zt-muted); font-size: 14px; text-decoration: none; white-space: nowrap; }
.zt-nav-product-icon { width: 18px; height: 18px; margin-right: 6px; border: 1px solid var(--zt-line); border-radius: 5px; object-fit: cover; background: var(--zt-surface); }
.zt-nav-links a:hover, .zt-nav-links a:focus-visible, .zt-nav-links a[aria-current="page"] { color: var(--zt-green); background: var(--zt-mint); }
.zt-nav-links a[aria-current="page"] { font-weight: 700; }

.zt-hero { padding: clamp(86px, 12vw, 148px) 0 112px; background: var(--zt-page); }
.zt-hero-grid { display: grid; grid-template-columns: minmax(0, .88fr) minmax(420px, .92fr); gap: clamp(48px, 8vw, 110px); align-items: center; }
.zt-hero-copy { max-width: 560px; }
.zt-kicker { display: inline-flex; margin-bottom: 22px; padding: 5px 10px; color: var(--zt-green); border-radius: 999px; background: var(--zt-mint-strong); font-size: 12px; font-weight: 720; }
.zt-hero h1 { margin: 0 0 21px; font-family: var(--zt-display); font-size: clamp(42px, 6vw, 72px); line-height: 1.05; letter-spacing: -.045em; text-wrap: balance; }
.zt-hero h1 strong { color: var(--zt-green); font-weight: 720; }
.zt-hero-lede { max-width: 510px; margin: 0; color: var(--zt-muted); font-size: 18px; line-height: 1.75; }
.zt-hero-action { display: inline-flex; align-items: center; gap: 13px; margin-top: 31px; padding: 0; color: var(--zt-green); font-size: 15px; font-weight: 720; text-decoration: none; }
.zt-hero-action::after, .zt-enter::after { content: "↗"; font-size: 18px; transition: transform .2s ease; }
.zt-hero-action:hover::after, .zt-enter:hover::after { transform: translate(3px, -3px); }
.zt-hero-note { margin: 25px 0 0; color: var(--zt-faint); font-size: 12px; }
.zt-selector { padding: 14px; border: 1px solid var(--zt-line); border-radius: var(--zt-radius); background: var(--zt-surface); box-shadow: 0 7px 14px oklch(40% .03 145 / .07); }
.zt-selector-row { display: flex; align-items: center; gap: 15px; min-height: 86px; padding: 12px 15px; border-bottom: 1px solid var(--zt-line); text-decoration: none; }
.zt-selector-row:last-child { border-bottom: 0; }
.zt-selector-row:hover { background: var(--zt-mint); }
.zt-selector-row img, .zt-product-icon { width: 48px; height: 48px; border-radius: 13px; object-fit: cover; }
.zt-selector-copy { flex: 1; min-width: 0; }
.zt-selector-copy strong { display: block; font-size: 16px; }
.zt-selector-copy span { display: block; margin-top: 3px; color: var(--zt-muted); font-size: 12px; }
.zt-arrow { color: var(--zt-green); font-size: 20px; }

.zt-product-section { border-top: 1px solid var(--zt-line); background: var(--zt-surface); }
.zt-product-section:nth-of-type(even) { background: var(--zt-mint); }
.zt-product-inner { display: grid; grid-template-columns: minmax(280px, .74fr) minmax(0, 1.26fr); gap: clamp(42px, 8vw, 105px); align-items: center; min-height: 420px; padding: 72px 0; }
.zt-product-section.is-reverse .zt-product-inner { grid-template-columns: minmax(0, 1.26fr) minmax(280px, .74fr); }
.zt-product-section.is-reverse .zt-product-copy { order: 2; }
.zt-product-section.is-reverse .zt-product-visual { order: 1; }
.zt-product-copy { max-width: 395px; }
.zt-product-copy .zt-kicker { margin-bottom: 18px; }
.zt-product-copy h2 { margin: 0 0 13px; font-family: var(--zt-display); font-size: clamp(29px, 4vw, 47px); line-height: 1.08; letter-spacing: -.04em; text-wrap: balance; }
.zt-product-copy p { margin: 0; color: var(--zt-muted); font-size: 15px; }
.zt-enter { display: inline-flex; align-items: center; gap: 11px; margin-top: 24px; color: var(--zt-green); font-size: 14px; font-weight: 720; text-decoration: none; }
.zt-product-visual { min-width: 0; }
.zt-screenshot { width: min(100%, 440px); max-height: 555px; margin: 0 auto; object-fit: contain; object-position: top center; border-radius: 22px; }
.zt-screenshot-battery { box-shadow: 0 10px 24px oklch(45% .04 145 / .08); }

.zt-ui-panel { overflow: hidden; border: 1px solid var(--zt-line); border-radius: var(--zt-radius); background: var(--zt-surface); }
.zt-ui-head { display: flex; align-items: center; justify-content: space-between; min-height: 60px; padding: 0 22px; border-bottom: 1px solid var(--zt-line); }
.zt-ui-head strong { font-family: var(--zt-display); font-size: 17px; }
.zt-ui-head span { color: var(--zt-faint); font-size: 12px; }
.zt-ui-body { padding: 22px; }
.zt-health-summary { display: grid; grid-template-columns: 1.1fr .9fr; gap: 14px; }
.zt-health-main { min-height: 210px; padding: 24px; border-radius: 11px; background: var(--zt-mint); }
.zt-health-main small, .zt-ui-label { color: var(--zt-muted); font-size: 12px; }
.zt-health-main strong { display: block; margin-top: 45px; color: var(--zt-green); font-family: var(--zt-display); font-size: 50px; line-height: 1; letter-spacing: -.05em; }
.zt-health-main p { margin: 10px 0 0; color: var(--zt-muted); font-size: 13px; }
.zt-health-side { display: grid; gap: 14px; }
.zt-mini-row { padding: 17px; border: 1px solid var(--zt-line); border-radius: 11px; }
.zt-mini-row strong { display: block; margin-top: 14px; font-size: 18px; }
.zt-chart { position: relative; height: 112px; margin-top: 18px; border-top: 1px solid var(--zt-line); border-bottom: 1px solid var(--zt-line); background: linear-gradient(to bottom, transparent 49%, var(--zt-line) 50%, transparent 51%); }
.zt-chart::after { content: ""; position: absolute; inset: 33px 0 21px; background: var(--zt-green-soft); clip-path: polygon(0 72%, 12% 66%, 24% 70%, 36% 52%, 48% 62%, 60% 42%, 72% 49%, 84% 26%, 100% 35%, 100% 100%, 0 100%); opacity: .56; }
.zt-chart::before { content: ""; position: absolute; left: 0; right: 0; top: 52px; height: 2px; background: var(--zt-green); clip-path: polygon(0 80%, 12% 70%, 24% 74%, 36% 49%, 48% 62%, 60% 39%, 72% 47%, 84% 18%, 100% 28%, 100% 42%, 84% 31%, 72% 60%, 60% 51%, 48% 74%, 36% 61%, 24% 86%, 12% 82%, 0 92%); }
.zt-tool-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 11px; }
.zt-tool-item { display: flex; align-items: start; gap: 12px; min-height: 92px; padding: 16px; border: 1px solid var(--zt-line); border-radius: 11px; background: var(--zt-surface); }
.zt-tool-item b { color: var(--zt-green); font-size: 13px; }
.zt-tool-item span { display: block; margin-top: 5px; color: var(--zt-muted); font-size: 12px; line-height: 1.45; }
.zt-terminal { min-height: 250px; padding: 24px; border-radius: var(--zt-radius); color: oklch(94% .02 145); background: var(--zt-graphite); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.zt-terminal-line { display: grid; grid-template-columns: 92px 1fr; gap: 18px; padding: 11px 0; border-bottom: 1px solid oklch(100% 0 0 / .09); font-size: 13px; }
.zt-terminal-line:last-child { border-bottom: 0; }
.zt-terminal-line b { color: var(--zt-green-soft); font-weight: 600; }
.zt-terminal-line span { color: oklch(82% .02 145); }
.zt-monitor-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 14px; }
.zt-monitor-main { min-height: 290px; padding: 22px; border-radius: 11px; background: oklch(96% .025 200); }
.zt-monitor-main strong { display: block; margin-top: 18px; color: var(--zt-cyan); font-family: var(--zt-display); font-size: 42px; letter-spacing: -.05em; }
.zt-monitor-main small { color: var(--zt-muted); font-size: 12px; }
.zt-monitor-line { height: 86px; margin-top: 24px; border-top: 1px solid oklch(85% .04 200); border-bottom: 1px solid oklch(85% .04 200); background: linear-gradient(158deg, transparent 58%, var(--zt-cyan) 59%, transparent 61%); }
.zt-monitor-side { display: grid; gap: 14px; }
.zt-monitor-stat { min-height: 88px; padding: 17px; border: 1px solid var(--zt-line); border-radius: 11px; background: var(--zt-surface); }
.zt-monitor-stat b { display: block; margin-top: 12px; color: var(--zt-ink); font-size: 17px; }

.zt-detail-hero { padding: 92px 0 76px; background: var(--zt-mint); }
.zt-detail-hero-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(360px, .85fr); gap: 70px; align-items: center; }
.zt-detail-hero h1 { margin: 13px 0 16px; font-family: var(--zt-display); font-size: clamp(40px, 6vw, 68px); line-height: 1; letter-spacing: -.05em; }
.zt-detail-hero p { max-width: 560px; margin: 0; color: var(--zt-muted); font-size: 17px; }
.zt-detail-icon { width: 74px; height: 74px; border-radius: 20px; object-fit: cover; }
.zt-detail-visual { display: flex; justify-content: center; }
.zt-detail-visual .zt-screenshot { max-height: 530px; }
.zt-detail-section { padding: 110px 0; border-top: 1px solid var(--zt-line); }
.zt-detail-section:nth-of-type(even) { background: var(--zt-surface); }
.zt-detail-heading { max-width: 640px; margin-bottom: 44px; }
.zt-detail-heading h2 { margin: 13px 0 0; font-family: var(--zt-display); font-size: clamp(30px, 4vw, 48px); line-height: 1.08; letter-spacing: -.04em; text-wrap: balance; }
.zt-detail-heading p { margin: 16px 0 0; color: var(--zt-muted); }
.zt-detail-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.zt-detail-item { min-height: 182px; padding: 22px; border: 1px solid var(--zt-line); border-radius: var(--zt-radius); background: var(--zt-surface); }
.zt-detail-item h3 { margin: 0 0 10px; font-family: var(--zt-display); font-size: 18px; }
.zt-detail-item p { margin: 0; color: var(--zt-muted); font-size: 14px; }
.zt-link-row { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 30px; }
.zt-button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 17px; border: 1px solid var(--zt-green); border-radius: 9px; color: var(--zt-green); font-size: 14px; font-weight: 720; text-decoration: none; }
.zt-button:hover, .zt-button:focus-visible { color: var(--zt-surface); background: var(--zt-green); }
.zt-button-solid { color: var(--zt-surface); background: var(--zt-green); }
.zt-button-solid:hover, .zt-button-solid:focus-visible { border-color: var(--zt-green-dark); background: var(--zt-green-dark); }

.zt-footer { padding: 38px 0 30px; border-top: 1px solid var(--zt-line); background: var(--zt-surface); }
.zt-footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--zt-muted); font-size: 13px; }
.zt-footer-links { display: flex; gap: 18px; }
.zt-footer a { text-decoration: none; }
.zt-footer a:hover { color: var(--zt-green); }
.zt-privacy-main { padding: 86px 0 112px; }
.zt-privacy-head { max-width: 720px; padding-bottom: 48px; border-bottom: 1px solid var(--zt-line); }
.zt-privacy-head h1 { margin: 16px 0 14px; font-family: var(--zt-display); font-size: clamp(40px, 6vw, 65px); line-height: 1; letter-spacing: -.05em; }
.zt-privacy-head p { margin: 0; color: var(--zt-muted); font-size: 17px; }
.zt-privacy-grid { display: grid; grid-template-columns: 180px minmax(0, 700px); gap: 76px; padding-top: 52px; }
.zt-privacy-index { position: sticky; top: 100px; align-self: start; display: grid; gap: 10px; color: var(--zt-faint); font-size: 12px; }
.zt-privacy-index a { text-decoration: none; }
.zt-privacy-index a:hover { color: var(--zt-green); }
.zt-policy-section { padding-bottom: 38px; }
.zt-policy-section + .zt-policy-section { padding-top: 38px; border-top: 1px solid var(--zt-line); }
.zt-policy-section h2 { margin: 0 0 12px; font-family: var(--zt-display); font-size: 23px; letter-spacing: -.03em; }
.zt-policy-section p, .zt-policy-section li { color: var(--zt-muted); font-size: 15px; }
.zt-policy-section p { margin: 0 0 13px; }
.zt-policy-section ul { display: grid; gap: 8px; margin: 0; padding-left: 21px; }

:focus-visible { outline: 3px solid oklch(49% .15 145 / .35); outline-offset: 3px; }
@media (max-width: 900px) {
    .zt-hero-grid, .zt-detail-hero-grid { grid-template-columns: 1fr; }
    .zt-hero-grid { gap: 55px; }
    .zt-selector { max-width: 640px; }
    .zt-product-inner, .zt-product-section.is-reverse .zt-product-inner { grid-template-columns: 1fr; gap: 35px; }
    .zt-product-section.is-reverse .zt-product-copy, .zt-product-section.is-reverse .zt-product-visual { order: initial; }
    .zt-product-copy { max-width: 620px; }
    .zt-detail-hero-grid { gap: 42px; }
    .zt-privacy-grid { grid-template-columns: 1fr; gap: 26px; }
    .zt-privacy-index { position: static; display: flex; flex-wrap: wrap; gap: 12px 18px; }
}
@media (max-width: 620px) {
    .zt-wrap { width: min(var(--zt-max), calc(100% - 32px)); }
    .zt-nav { min-height: 64px; gap: 8px; }
    .zt-brand-word { display: none; }
    .zt-nav-links { gap: 0; }
    .zt-nav-links a { min-height: 34px; padding: 0 7px; font-size: 12px; }
    .zt-nav-product-icon { width: 20px; height: 20px; margin-right: 4px; border-radius: 6px; }
    .zt-hero { padding: 68px 0 75px; }
    .zt-hero h1 { font-size: clamp(40px, 12vw, 58px); }
    .zt-hero-lede { font-size: 16px; }
    .zt-selector-row { min-height: 75px; padding: 10px 8px; }
    .zt-selector-row img, .zt-product-icon { width: 42px; height: 42px; border-radius: 11px; }
    .zt-product-inner { min-height: 0; padding: 64px 0; }
    .zt-product-copy h2 { font-size: 36px; }
    .zt-health-summary, .zt-monitor-layout { grid-template-columns: 1fr; }
    .zt-tool-list, .zt-detail-grid { grid-template-columns: 1fr; }
    .zt-health-main { min-height: 180px; }
    .zt-terminal-line { grid-template-columns: 78px 1fr; gap: 12px; font-size: 11px; }
    .zt-detail-hero { padding: 68px 0 58px; }
    .zt-detail-hero h1 { font-size: 48px; }
    .zt-detail-section { padding: 76px 0; }
    .zt-footer-inner { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}