:root { color-scheme: dark; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: #101a23; color: #e7eef4; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 85% 0%, #173d46, transparent 34rem), #101a23; }
main { width: min(920px, calc(100% - 32px)); margin: 0 auto; padding: 64px 0; }
header { margin-bottom: 30px; max-width: 680px; }
h1, h2, p { margin-top: 0; }
h1 { font-size: clamp(2rem, 7vw, 3.7rem); line-height: 1; letter-spacing: -.05em; margin-bottom: 15px; }
h2 { margin-bottom: 0; font-size: 1.3rem; }
.eyebrow, .kicker { color: #76dbc6; font-weight: 700; letter-spacing: .13em; font-size: .72rem; }
.intro { color: #b8c7d2; line-height: 1.65; }
.panel { margin-top: 20px; padding: 28px; border: 1px solid #29404f; background: rgba(16, 29, 39, .86); border-radius: 16px; box-shadow: 0 20px 60px rgba(0, 0, 0, .17); }
.panel.accent { border-color: #35686b; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.section-heading .kicker { margin-bottom: 6px; }
.tag { padding: 5px 9px; color: #9acfc6; background: #173d3e; border-radius: 999px; font-size: .72rem; white-space: nowrap; }
.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
label { display: grid; gap: 8px; color: #d6e2ea; font-size: .92rem; }
.wide { grid-column: 1 / -1; }
select, textarea, input[type="range"] { width: 100%; }
select, textarea { color: inherit; border: 1px solid #3b5361; background: #0d1820; border-radius: 8px; padding: 10px 12px; font: inherit; }
textarea { resize: vertical; line-height: 1.55; }
input[type="range"] { accent-color: #70d7c1; }
small { min-height: 34px; color: #8da1af; line-height: 1.45; font-size: .78rem; }
.value { color: #76dbc6; float: right; font-variant-numeric: tabular-nums; }
.actions { display: flex; justify-content: flex-end; }
button { color: #062e2c; background: #79dfc8; border: 0; border-radius: 8px; padding: 11px 16px; font: inherit; font-weight: 750; cursor: pointer; }
button:hover { background: #a0edd9; } button:disabled { opacity: .65; cursor: wait; }
audio { width: 100%; margin-top: 23px; }
.notice { padding: 12px 14px; border-radius: 9px; background: #522b2e; color: #ffd9d9; }
.notice.success { color: #cbfff1; background: #17463e; }
@media (max-width: 650px) { main { padding: 36px 0; } .panel { padding: 20px; } .form-grid { grid-template-columns: 1fr; } .wide { grid-column: auto; } }