:root {
  color-scheme: dark;
  --bg: #101413;
  --surface: #181e1b;
  --surface-light: #202824;
  --border: #2a332e;
  --text: #f0f3eb;
  --muted: #99a59c;
  --green: #b7ee8e;
  --green-dark: #233323;
  --mono: 'Courier New', monospace;
  --sans: 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(ellipse at 50% 24%, rgba(119, 160, 105, .08), transparent 45%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
}

button, input, select { font: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }

.page { width: min(100% - 40px, 980px); min-height: 100vh; margin: 0 auto; display: flex; flex-direction: column; }
.topbar { height: 82px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(255,255,255,.07); }
.brand { display: inline-flex; gap: 10px; align-items: center; color: var(--text); text-decoration: none; font-weight: 700; font-size: 19px; letter-spacing: -.6px; }
.brand-mark { width: 27px; height: 27px; display: grid; place-items: center; border-radius: 9px 9px 9px 3px; background: var(--green); color: #172019; font: 600 19px var(--sans); }
.top-note, .footer { color: #758078; font: 11px var(--mono); letter-spacing: .04em; }

.home-screen { flex: 1; }
.hero { max-width: 670px; margin: 46px auto 68px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: #ff6961; font: 10px var(--mono); letter-spacing: .12em; animation: eyebrow-blink 1s steps(1, end) infinite; }
@keyframes eyebrow-blink { 50% { color: #fff; } }
.live-dot { width: 7px; height: 7px; display: inline-block; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px rgba(183,238,142,.55); }
h1 { margin: 24px 0 16px; font: 500 clamp(42px, 7vw, 68px)/1.07 Georgia, serif; letter-spacing: -2px; }
.hero h1 span { color: var(--green); }
.hero-copy { max-width: 395px; margin: 0 auto; color: var(--muted); font-size: 15px; line-height: 1.7; }
.primary-button { margin-top: 30px; padding: 14px 22px; border: 0; border-radius: 9px; background: var(--green); color: #172019; font-weight: 700; transition: transform .18s, background .18s; }
.primary-button:hover { background: #c8f5a8; transform: translateY(-2px); }
.primary-button span { padding-left: 14px; font-size: 17px; }
.button-note { margin: 12px 0 0; color: #758078; font-size: 12px; }
.feature-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature-card { min-height: 151px; padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: rgba(24,30,27,.76); }
.feature-icon { color: var(--green); font-size: 19px; }
.timer-icon { font-size: 22px; }
.feature-card h2 { margin: 14px 0 7px; font-size: 14px; font-weight: 600; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.privacy-note { margin: 20px 0 0; color: #768178; font-size: 11px; text-align: center; }

.chat-screen { flex: 1; width: min(100%, 700px); margin: 48px auto 20px; display: flex; flex-direction: column; min-height: min(690px, calc(100vh - 170px)); }
.chat-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 14px; }
.back-link { color: var(--muted); font-size: 12px; text-decoration: none; }
.back-link:hover { color: var(--green); }
.chat-heading h1 { margin: 13px 0 5px; font: 500 34px Georgia, serif; letter-spacing: -.7px; }
.chat-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.room-status { display: flex; align-items: center; gap: 7px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 20px; color: var(--muted); font: 9px var(--mono); letter-spacing: .07em; white-space: nowrap; }
.room-status .live-dot { width: 6px; height: 6px; }
.share-card { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 23px; padding: 14px 15px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.share-copy { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.share-label { color: var(--muted); font: 9px var(--mono); letter-spacing: .1em; }
.share-url { overflow: hidden; color: #dce5d8; font: 11px var(--mono); text-overflow: ellipsis; white-space: nowrap; }
.copy-button { flex: 0 0 auto; padding: 9px 12px; border: 1px solid #3b493d; border-radius: 7px; background: var(--green-dark); color: var(--green); font-size: 11px; font-weight: 600; }
.copy-button:hover { border-color: var(--green); }
.chat-warning { margin: 12px 0 2px; color: #758078; font-size: 11px; line-height: 1.6; }
.messages { flex: 1; min-height: 230px; max-height: 430px; overflow-y: auto; margin: 14px 0; padding: 14px; border: 1px solid var(--border); border-radius: 12px; background: rgba(24,30,27,.58); }
.empty-state { min-height: 195px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--muted); text-align: center; }
.empty-star { color: var(--green); font-size: 23px; }
.empty-state p { margin: 10px 0 5px; color: var(--text); font-size: 13px; }
.empty-state > span:last-child { font-size: 11px; }
.message { width: fit-content; max-width: min(82%, 460px); margin: 0 0 12px auto; padding: 10px 12px 8px; border: 1px solid #344432; border-radius: 12px 12px 3px 12px; background: var(--green-dark); overflow-wrap: anywhere; }
.message.received { margin-right: auto; margin-left: 0; border-color: var(--border); border-radius: 12px 12px 12px 3px; background: var(--surface-light); }
.message-text { margin: 0; color: var(--text); font-size: 13px; line-height: 1.55; white-space: pre-wrap; }
.message-meta { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 7px; color: #93a18f; font: 9px var(--mono); }
.message.received .message-meta { color: #89968d; }
.composer { display: flex; align-items: center; gap: 8px; padding: 7px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.composer select { width: 85px; padding: 8px 4px; border: 0; outline: 0; background: transparent; color: var(--green); font-size: 11px; }
.composer select option { background: var(--surface); color: var(--text); }
.composer input { flex: 1; min-width: 0; padding: 10px 4px; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 13px; }
.composer input::placeholder { color: #77827a; }
.send-button { width: 35px; height: 35px; border: 0; border-radius: 8px; background: var(--green); color: #172019; font-size: 20px; line-height: 1; }
.send-button:hover { background: #c8f5a8; }
.status-message { min-height: 16px; margin: 7px 0 0; color: #edac97; font-size: 11px; }
.footer { padding: 22px 0 24px; text-align: center; }
.footer span { color: #a7b49f; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (max-width: 650px) {
  .page { width: min(100% - 28px, 540px); }
  .topbar { height: 67px; }
  .hero { margin: 38px auto 52px; }
  .feature-row { grid-template-columns: 1fr; gap: 9px; }
  .feature-card { min-height: auto; padding: 15px; }
  .feature-card h2 { margin-top: 8px; }
  .chat-screen { min-height: calc(100vh - 135px); margin-top: 31px; }
  .chat-heading h1 { font-size: 29px; }
  .room-status { padding: 7px; font-size: 8px; }
  .share-url { max-width: 58vw; }
  .messages { min-height: 200px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
  .eyebrow { animation: none; }
}