@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  --ink: #20232c;
  --muted: #828692;
  --accent: #6558df;
  --canvas: #f6f7fb;
  --paper: #fff;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: var(--canvas); color: var(--ink); font-family: 'DM Sans', system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
.page { width: min(100% - 40px, 800px); margin: 0 auto; }
.topbar { height: 82px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #e9eaf0; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-family: Manrope, sans-serif; font-size: 17px; font-weight: 800; letter-spacing: -.6px; }
.brand-mark { display: grid; width: 31px; height: 31px; place-items: center; border-radius: 10px; background: var(--accent); color: white; font-size: 20px; font-weight: 500; }
.private-note { display: flex; align-items: center; gap: 7px; color: #9295a0; font-size: 11px; }
.private-note span { color: #4ba57d; font-size: 8px; }
.intro { padding: 86px 0 32px; text-align: center; }
.eyebrow { margin: 0 0 15px; color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: 1.65px; }
h1 { margin: 0 0 15px; font-family: Manrope, sans-serif; font-size: clamp(39px, 7vw, 59px); font-weight: 800; letter-spacing: -3px; line-height: 1.08; }
h1 span { color: var(--accent); }
.subtitle { margin: 0; color: var(--muted); font-size: 15px; }
.sheet-frame { width: min(100%, 800px); height: min(70vh, 720px); min-height: 420px; margin: 16px auto 0; overflow: hidden; border: 1px solid #e5e7eb; border-radius: 14px; background: var(--paper); box-shadow: 0 18px 55px rgba(35, 37, 64, .07); }
.sheet-frame iframe { display: block; width: 100%; height: 100%; border: 0; background: white; }
.brand:focus-visible { outline: 3px solid #b5aff6; outline-offset: 3px; }
.hint { display: flex; align-items: center; justify-content: center; gap: 6px; margin: 16px 0 0; color: #a0a2ac; font-size: 11px; }
.hint span { color: #897fe7; font-size: 13px; }
footer { padding: 80px 0 30px; color: #a0a2ac; text-align: center; font-size: 10px; }
footer span { margin-left: 3px; color: #897fe7; }
@media (max-width: 560px) {
  .page { width: min(100% - 28px, 460px); }
  .topbar { height: 69px; }
  .intro { padding: 69px 0 25px; }
  h1 { letter-spacing: -2.2px; }
  .subtitle { max-width: 300px; margin: 0 auto; font-size: 14px; line-height: 1.55; }
  .sheet-frame { height: 72vh; min-height: 430px; margin-top: 10px; border-radius: 11px; }
  footer { padding-top: 65px; }
}
@media (max-width: 360px) { .private-note { font-size: 10px; } }