:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b1020;
  color: #f3f6ff;
  font-synthesis: none;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { min-width: 320px; min-height: 100vh; margin: 0; background: radial-gradient(circle at 11% 0%, #302976 0, #141a36 36%, #0b1020 76%); }
button, input { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid #8ef5d2; outline-offset: 3px; }
button:disabled { cursor: not-allowed; opacity: .48; filter: grayscale(.15); }

.landing-page, .room-page { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.landing-page { padding: 26px 0 56px; }
.landing-header, .room-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { color: #fff; font-size: 1.4rem; font-weight: 850; letter-spacing: -.075em; text-decoration: none; }
.brand span { color: #8ef5d2; }
.privacy-pill, .participants-heading span { padding: 5px 10px; border: 1px solid rgba(142,245,210,.28); border-radius: 999px; color: #b3f9df; font-size: .78rem; font-weight: 700; }

.hero { max-width: 760px; padding: 88px 0 36px; }
.eyebrow, .card-label { margin: 0; color: #8ef5d2; font-size: .75rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { max-width: 720px; margin: 12px 0 20px; font-size: clamp(3rem, 7vw, 6rem); line-height: .92; letter-spacing: -.08em; }
.intro-copy { max-width: 610px; margin: 0; color: #c1c9e8; font-size: 1.1rem; line-height: 1.66; }
.temporary-notice { display: flex; align-items: flex-start; gap: 12px; max-width: 760px; margin-bottom: 28px; padding: 15px 18px; border: 1px solid rgba(142,245,210,.22); border-radius: 14px; background: rgba(21, 67, 64, .35); color: #d7f7ec; }
.temporary-notice span { color: #8ef5d2; font-size: 1.35rem; line-height: 1; }
.temporary-notice p { margin: 0; line-height: 1.5; }

.action-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: 18px; align-items: stretch; }
.card, .join-card, .invite-card { border: 1px solid rgba(255,255,255,.13); border-radius: 22px; background: rgba(22, 28, 53, .83); box-shadow: 0 18px 60px rgba(0,0,0,.18); }
.card { display: flex; min-height: 480px; flex-direction: column; padding: 28px; }
.join-card-home { background: rgba(14, 19, 39, .74); }
.card-heading h2 { margin: 8px 0; font-size: 1.55rem; letter-spacing: -.045em; }
.card-heading p:not(.card-label) { margin-bottom: 0; color: #b8c2df; line-height: 1.5; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.field, .join-card form { display: grid; gap: 7px; }
.field-full { grid-column: 1 / -1; }
.join-code-field { margin-top: 31px; }
label { color: #dce3ff; font-size: .84rem; font-weight: 750; }
input { width: 100%; min-width: 0; padding: 12px 13px; border: 1px solid #586287; border-radius: 11px; background: #0d1328; color: #f7f9ff; }
input::placeholder { color: #8791b2; }
input:focus { border-color: #8ef5d2; box-shadow: 0 0 0 3px rgba(142,245,210,.13); outline: 0; }
button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 44px; padding: 10px 15px; border: 0; border-radius: 11px; background: #8ef5d2; color: #09221f; font-weight: 800; }
button:hover:not(:disabled) { filter: brightness(1.07); transform: translateY(-1px); }
.card > button, .join-card-home > button { margin-top: auto; }
.button-secondary { background: #8492ff; color: #fff; }
.form-error { min-height: 20px; margin: 10px 0 0; color: #ffbbc1; font-size: .84rem; line-height: 1.4; }
.card-footnote { margin: 15px 0 0; color: #959fbe; font-size: .82rem; line-height: 1.45; }

.invite-card { display: grid; gap: 16px; margin-top: 20px; padding: 24px 28px; border-color: rgba(142,245,210,.34); background: rgba(19, 68, 63, .55); }
.invite-card h2 { margin: 7px 0; font-size: 1.45rem; }
.invite-card h2 span { color: #8ef5d2; letter-spacing: .1em; }
.invite-card p:not(.card-label) { margin-bottom: 0; color: #d2ede5; }
.invite-link-row { display: flex; gap: 10px; }
.invite-link-row input { flex: 1; }
.invite-link-row button { flex: 0 0 auto; }
.open-room-link { color: #8ef5d2; font-weight: 800; text-decoration-thickness: 2px; text-underline-offset: 4px; }

.room-page { min-height: 100vh; padding: 22px 0; }
.connection-state { display: inline-flex; align-items: center; gap: 8px; color: #b9c3e3; font-size: .84rem; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: #e4b557; }
.connection-state.is-connected .status-dot { background: #66e2a1; box-shadow: 0 0 10px #66e2a1; }
.connection-state.is-disconnected .status-dot { background: #f47f89; }
.notice-panel { margin: 16px 0; padding: 12px 15px; border: 1px solid #8c6980; border-radius: 12px; background: #351f31; color: #ffe3e5; font-size: .9rem; }
.notice-panel.is-info { border-color: #6571b2; background: #20284a; color: #e1e6ff; }

.join-card { width: min(100%, 500px); margin: 72px auto 0; padding: 30px; }
.join-card h1 { margin: 10px 0; font-size: clamp(2.1rem, 7vw, 3.4rem); letter-spacing: -.065em; }
.join-card > p:not(.card-label) { color: #b8c2df; line-height: 1.5; }
.join-card form { margin-top: 24px; }
.room-entry form > button { margin-top: 8px; }

.room-layout { display: grid; min-height: calc(100vh - 100px); grid-template-columns: 270px minmax(0, 1fr); overflow: hidden; border: 1px solid rgba(255,255,255,.13); border-radius: 22px; background: rgba(18, 23, 45, .91); }
.participants-panel { padding: 22px; border-right: 1px solid rgba(255,255,255,.1); background: rgba(8, 13, 28, .4); }
.room-code-wrap strong { color: #fff; font-size: 1.5rem; letter-spacing: .09em; }
.room-code-row { display: flex; align-items: center; gap: 10px; margin-top: 5px; }
.icon-button { width: 34px; min-height: 34px; padding: 0; border: 1px solid #536089; background: transparent; color: #dfe5ff; }
.identity-card { display: flex; align-items: center; gap: 10px; margin: 26px 0; padding: 11px; border-radius: 13px; background: #202848; }
.identity-avatar { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; background: #8ef5d2; color: #153e36; font-size: .65rem; }
.identity-card small { display: block; color: #abb5d5; font-size: .72rem; }
.identity-card strong { display: block; margin-top: 2px; color: #fff; font-size: .88rem; }
.participants-heading { display: flex; align-items: center; justify-content: space-between; }
.participants-heading h2 { margin: 0; font-size: .95rem; }
.participants-heading span { border: 0; background: #303a61; color: #d8e0ff; }
.participant-list { display: grid; gap: 5px; padding: 0; list-style: none; }
.participant-list li { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 7px 0; color: #cbd3ed; font-size: .88rem; }
.participant-list .participant-self { color: #8ef5d2; font-weight: 800; }
.kick-button { min-height: 30px; padding: 4px 8px; border: 1px solid #795269; background: transparent; color: #ffc1c7; font-size: .72rem; }

.chat-panel { display: flex; min-width: 0; min-height: 0; flex-direction: column; }
.chat-topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; padding: 21px 25px; border-bottom: 1px solid rgba(255,255,255,.1); }
.chat-topbar h1 { margin: 4px 0 0; font-size: 1.3rem; letter-spacing: -.04em; }
.room-actions, .owner-controls { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 7px 12px; }
.text-button { min-height: 30px; padding: 4px 0; border-radius: 0; background: transparent; color: #d3dbf7; font-size: .82rem; }
.text-button:hover:not(:disabled) { color: #8ef5d2; }
.danger-button, .leave-button { color: #ffb7bd; }
.limit-control { display: inline-flex; align-items: center; gap: 5px; color: #bfc8e8; font-size: .76rem; font-weight: 700; }
.limit-control input { width: 52px; padding: 4px 6px; }
.messages { flex: 1; min-height: 260px; overflow-y: auto; padding: 22px 25px; scroll-behavior: smooth; }
.empty-chat { display: grid; min-height: 180px; place-content: center; color: #aeb8d8; text-align: center; }
.chat-message { align-self: flex-start; max-width: min(76%, 620px); margin: 10px 0; padding: 11px 13px; border-radius: 14px 14px 14px 4px; background: #29345c; color: #f6f8ff; overflow-wrap: anywhere; }
.chat-message.own { align-self: flex-end; margin-left: auto; border-radius: 14px 14px 4px 14px; background: #21655c; }
.chat-message strong { display: block; margin-bottom: 4px; color: #9cf9da; font-size: .78rem; }
.chat-message p { margin: 0; line-height: 1.48; white-space: pre-wrap; overflow-wrap: anywhere; }
.chat-message time { display: block; margin-top: 6px; color: #c6d1e8; font-size: .72rem; text-align: right; }
.system-message { display: flex; align-items: baseline; justify-content: center; gap: 8px; margin: 15px auto; color: #9da9ca; font-size: .78rem; text-align: center; }
.system-message p { margin: 0; }
.system-message time { color: #7884a8; font-size: .71rem; }
.typing-indicator { min-height: 24px; padding: 0 25px; color: #a9b5d8; font-size: .82rem; font-style: italic; }
.message-form { position: sticky; bottom: 0; display: flex; gap: 10px; padding: 15px 25px; border-top: 1px solid rgba(255,255,255,.1); background: #161c36; }
.message-form input { flex: 1; }
.message-form button { flex: 0 0 auto; }
.message-error { padding: 0 25px 14px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

@media (max-width: 820px) {
  .landing-page, .room-page { width: min(100% - 28px, 620px); }
  .hero { padding-top: 56px; }
  .action-grid, .room-layout { grid-template-columns: 1fr; }
  .card { min-height: auto; }
  .join-card-home { min-height: 310px; }
  .participants-panel { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.1); }
  .identity-card { margin: 18px 0; }
  .participant-list { grid-template-columns: repeat(auto-fit, minmax(145px, 1fr)); }
  .room-layout { overflow: visible; }
  .chat-panel { min-height: 530px; }
}

@media (max-width: 560px) {
  .landing-page, .room-page { width: min(100% - 24px, 520px); }
  .landing-page { padding-top: 18px; }
  .hero h1 { font-size: clamp(2.8rem, 15vw, 4.3rem); }
  .field-grid { grid-template-columns: 1fr; }
  .field-full { grid-column: auto; }
  .card, .join-card { padding: 22px 18px; border-radius: 18px; }
  .invite-card { padding: 20px; }
  .invite-link-row { flex-direction: column; }
  .invite-link-row button { width: 100%; }
  .chat-topbar, .messages, .message-form { padding-right: 16px; padding-left: 16px; }
  .typing-indicator, .message-error { padding-right: 16px; padding-left: 16px; }
  .chat-topbar { gap: 11px; }
  .room-actions { max-width: 58%; }
  .owner-controls { justify-content: flex-end; }
  .message-form { padding-top: 12px; padding-bottom: 12px; }
  .message-form button { padding-right: 11px; padding-left: 11px; }
  .chat-message { max-width: 90%; }
}