:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  color: #1d2939;
  background: #f7f8fb;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
body { margin: 0; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { opacity: .55; cursor: wait; }
button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid #8db9fc; outline-offset: 3px; }
.page { max-width: 710px; margin: 0 auto; padding: 38px 20px 28px; }
.intro { max-width: 580px; margin: 0 auto 25px; }
.eyebrow { margin: 0 0 10px; color: #4a6284; font-size: .77rem; font-weight: 750; letter-spacing: .09em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(1.9rem, 4vw, 2.35rem); letter-spacing: -.035em; line-height: 1.15; }
.lead { color: #475467; font-size: 1.03rem; line-height: 1.52; margin: 13px 0 16px; }
.disclaimer { font-size: .88rem; color: #566274; line-height: 1.52; margin: 0; padding: 12px 14px; background: #eaf0f6; border-radius: 10px; }
.disclaimer strong { color: #28384a; }
.experience { display: flex; flex-direction: column; align-items: center; }
.access { width: min(100%, 405px); margin: 4px 0 14px; }
.access label { display: block; font-size: .84rem; font-weight: 650; margin-bottom: 6px; color: #344054; }
.access input { display: block; width: 100%; border: 1px solid #cbd5e1; border-radius: 9px; padding: 10px 12px; color: #1f2937; font-size: 16px; background: #fff; }
.demo-label { margin: 2px 0 11px; font-size: .74rem; color: #6b7484; letter-spacing: .025em; }
.phone { width: min(100%, 405px); border-radius: 43px; padding: 8px; background: #19202a; border: 3px solid #343b45; box-shadow: 0 18px 34px rgba(25, 40, 62, .14), 0 3px 6px rgba(25, 40, 62, .08); }
.phone-screen { position: relative; border-radius: 33px; overflow: hidden; height: 545px; display: flex; flex-direction: column; background: #fff; }
.phone-status-bar { position: relative; height: 43px; flex-shrink: 0; display: flex; align-items: center; justify-content: space-between; padding: 0 23px; font-size: 12px; font-weight: 750; letter-spacing: -.01em; color: #1b2531; }
.dynamic-island { position: absolute; top: 8px; left: 50%; transform: translateX(-50%); width: 104px; height: 23px; border-radius: 20px; background: #19202a; }
.status-symbols { display: flex; align-items: center; gap: 5px; }
.signal { font-size: 13px; letter-spacing: -3px; transform: translateY(2px); padding-right: 2px; }
.wifi { width: 15px; height: 15px; }
.battery { position: relative; display: inline-block; width: 19px; height: 10px; border: 1.6px solid #1b2531; border-radius: 3px; margin-left: 1px; }
.battery::before { content: ""; position: absolute; inset: 2px; background: #1b2531; border-radius: 1px; }
.battery::after { content: ""; position: absolute; right: -4px; top: 3px; width: 2px; height: 4px; border-radius: 0 2px 2px 0; background: #1b2531; }
.chat-header { display: flex; flex-shrink: 0; align-items: center; gap: 10px; padding: 9px 17px 13px; border-bottom: 1px solid #e8ebf0; background: #fbfcfe; }
.avatar { width: 34px; height: 34px; display: grid; place-items: center; background: #dce9fb; color: #24518c; font-size: 11px; font-weight: 800; border-radius: 50%; }
.chat-header h2 { margin: 0; font-size: .93rem; line-height: 1.3; font-weight: 700; }
.chat-header p { margin: 1px 0 0; font-size: .73rem; color: #67758a; }
.chat-log { flex: 1; min-height: 0; padding: 11px 13px 18px; overflow-y: auto; overscroll-behavior: contain; background: #fff; }
.day-marker { text-align: center; color: #8c96a5; font-size: .72rem; font-weight: 600; margin: 2px 0 19px; }
.bubble-row { display: flex; margin: 8px 0; }
.user-row { justify-content: flex-end; }
.bot-row { justify-content: flex-start; }
.bubble { max-width: 84%; width: fit-content; padding: 10px 13px; line-height: 1.37; font-size: .93rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.bot-bubble { background: #e9ebf1; color: #1f2937; border-radius: 17px 17px 17px 5px; }
.user-bubble { background: #2c74d5; color: #fff; border-radius: 17px 17px 5px 17px; }
.composer { display: flex; flex-shrink: 0; align-items: end; gap: 9px; padding: 10px 12px 6px; border-top: 1px solid #e9ecf0; background: #fff; }
.composer textarea { flex: 1; resize: none; overflow-y: auto; min-width: 0; min-height: 40px; max-height: 112px; border: 1px solid #d5dce5; border-radius: 19px; padding: 10px 13px; line-height: 1.3; font-size: 16px; color: #1d2939; background: #fff; }
.composer textarea::placeholder { color: #929bad; }
.composer button { flex-shrink: 0; display: grid; place-items: center; border: 0; border-radius: 50%; width: 38px; height: 38px; margin-bottom: 1px; background: #2776dc; color: #fff; font-size: 24px; font-weight: 600; line-height: 1; }
.composer button:hover:not(:disabled) { background: #145ab3; }
.home-indicator { flex-shrink: 0; background: #19202a; border-radius: 10px; height: 4px; width: 110px; margin: 9px auto 7px; }
.under-phone { width: min(100%, 405px); display: flex; flex-direction: column; align-items: center; margin-top: 15px; }
.reset-button { border: 1px solid #cdd6e2; border-radius: 9px; background: #fff; padding: 9px 15px; color: #344d6d; font-size: .86rem; font-weight: 650; }
.reset-button:hover:not(:disabled) { background: #edf2f8; }
.status { min-height: 1.5em; margin: 9px 0 0; color: #596579; font-size: .82rem; text-align: center; line-height: 1.4; }
.status.error { color: #a12a32; }
.page-footer { text-align: center; font-size: .76rem; color: #8b95a3; line-height: 1.5; max-width: 430px; margin: 24px auto 0; }
.typing { display: flex; gap: 5px; align-items: center; height: 36px; min-width: 60px; }
.typing span { width: 6px; height: 6px; background: #7d8897; border-radius: 50%; animation: typing-pulse 1.2s ease-in-out infinite; }
.typing span:nth-child(2) { animation-delay: .2s; }
.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes typing-pulse { 0%, 60%, 100% { opacity: .4; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-3px); } }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }
@media (max-width: 480px) {
  .page { padding: 22px 14px 24px; }
  .intro { margin-bottom: 20px; }
  .lead { font-size: .98rem; }
  .phone { border-radius: 35px; padding: 6px; }
  .phone-screen { border-radius: 27px; height: min(535px, 65svh); min-height: 375px; }
}
@media (prefers-reduced-motion: reduce) { .typing span { animation: none; } }