:root{color-scheme:light dark;--page:#f7f9fb;--surface:#fff;--text:#17202a;--muted:#65717d;--line:#d8e0e7;--accent:#1778c8;--accent-hover:#1169b2;--soft:#eef6fc;--mark:#58b9c7}
*{box-sizing:border-box}
html{background:var(--page)}
body{min-width:320px;margin:0;background:var(--page);color:var(--text);font:16px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit}
.site-header{border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--surface) 94%,transparent)}
.header-inner{width:min(calc(100% - 36px),1040px);min-height:64px;margin:0 auto;display:flex;align-items:center;justify-content:center}
.wordmark{width:44px;height:44px;display:grid;place-items:center;text-decoration:none}
.wordmark img{width:36px;height:36px;display:block}
.landing-shell{width:min(calc(100% - 36px),1040px);margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) minmax(380px,470px);gap:76px;align-items:center;padding:84px 0 94px}
.hero{padding:18px 0}
.eyebrow{margin:0 0 14px;color:var(--accent);font-size:.78rem;font-weight:800;letter-spacing:.14em}
.hero h1{margin:0;font-size:clamp(2.5rem,5.5vw,4.45rem);line-height:1.12;letter-spacing:-.045em}
.hero-copy{margin:25px 0 0;color:var(--muted);font-size:1.08rem}
.primary-cta{width:min(100%,340px);min-height:52px;margin-top:34px;display:flex;align-items:center;justify-content:center;border:1px solid var(--accent);border-radius:7px;background:var(--accent);color:#fff;font-weight:750;text-decoration:none;box-shadow:0 8px 22px rgba(23,120,200,.16)}
.primary-cta:hover{border-color:var(--accent-hover);background:var(--accent-hover)}
.auth-note{width:min(100%,340px);margin:10px 0 0;text-align:center;color:var(--muted);font-size:.9rem}
.preview{overflow:hidden;border:1px solid var(--line);background:var(--surface);box-shadow:0 18px 55px rgba(23,32,42,.08)}
.composer-preview{min-height:86px;padding:20px;display:flex;align-items:flex-start;gap:13px;border-bottom:1px solid var(--line);color:#77838e;font-size:1.05rem}
.avatar-placeholder,.sample-avatar{flex:0 0 auto;width:42px;height:42px;border-radius:50%;background:var(--soft)}
.composer-preview>span:last-child{padding-top:6px}
.privacy-note{min-height:48px;padding:10px 20px;display:flex;align-items:center;gap:9px;border-bottom:1px solid var(--line);background:var(--soft);color:#3d657f;font-size:.9rem;font-weight:650}
.privacy-note svg{width:18px;height:18px;fill:currentColor}
.sample-post{padding:22px 20px 24px;display:flex;gap:13px}
.sample-avatar{display:grid;place-items:center;background:var(--mark);color:#fff;font-size:.85rem;font-weight:800}
.sample-content{min-width:0}
.sample-label{margin:0;font-size:.82rem;font-weight:800;letter-spacing:.08em}
.sample-body{margin:6px 0 0;font-size:1.03rem;line-height:1.55}
.sample-tag{margin:8px 0 0;color:var(--accent)}
.sample-caption{margin:18px 0 0;color:var(--muted);font-size:.78rem}
.site-footer{border-top:1px solid var(--line)}
.site-footer p{width:min(calc(100% - 36px),1040px);margin:0 auto;padding:22px 0;color:var(--muted);font-size:.78rem;text-align:center}
@media (prefers-color-scheme:dark){:root{--page:#101418;--surface:#161c22;--text:#eef2f6;--muted:#a7b2bc;--line:#303a44;--accent:#64afe8;--accent-hover:#83bfec;--soft:#172733;--mark:#58b9c7}.preview{box-shadow:none}.primary-cta{color:#08131c;box-shadow:none}.site-header{background:var(--surface)}}
:root[data-theme="light"]{color-scheme:light;--page:#f7f9fb;--surface:#fff;--text:#17202a;--muted:#65717d;--line:#d8e0e7;--accent:#1778c8;--accent-hover:#1169b2;--soft:#eef6fc;--mark:#58b9c7}
:root[data-theme="dark"]{color-scheme:dark;--page:#101418;--surface:#161c22;--text:#eef2f6;--muted:#a7b2bc;--line:#303a44;--accent:#64afe8;--accent-hover:#83bfec;--soft:#172733;--mark:#58b9c7}
:root[data-theme="light"] .preview{box-shadow:0 18px 55px rgba(23,32,42,.08)}:root[data-theme="light"] .primary-cta{color:#fff;box-shadow:0 8px 22px rgba(23,120,200,.16)}
:root[data-theme="dark"] .preview{box-shadow:none}:root[data-theme="dark"] .primary-cta{color:#08131c;box-shadow:none}:root[data-theme="dark"] .site-header{background:var(--surface)}
@media (max-width:800px){.landing-shell{grid-template-columns:1fr;gap:42px;padding:56px 0 70px}.hero{padding:0}.hero-copy br{display:none}.preview{width:min(100%,560px)}}
@media (max-width:520px){.header-inner,.landing-shell,.site-footer p{width:min(calc(100% - 28px),1040px)}.header-inner{min-height:58px}.landing-shell{gap:32px;padding:42px 0 calc(56px + env(safe-area-inset-bottom))}.hero h1{font-size:2.55rem}.hero-copy{margin-top:20px;font-size:1rem}.primary-cta{width:100%;margin-top:28px}.auth-note{width:100%}.preview{margin:0 -2px}.composer-preview{min-height:76px;padding:17px}.privacy-note{padding:9px 17px}.sample-post{padding:19px 17px 22px}.site-footer p{padding-bottom:calc(22px + env(safe-area-inset-bottom))}}
@media (prefers-reduced-motion:no-preference){.primary-cta{transition:background-color .15s ease,border-color .15s ease}}