:root {
  color-scheme: light;
  --bg: #f7f5ef;
  --panel: #fffdfa;
  --panel-soft: #eef6f3;
  --panel-strong: #ffffff;
  --ink: #152033;
  --muted: #586372;
  --line: #d8ddd6;
  --accent: #0b132b;
  --accent-ink: #f7f5ef;
  --accent-soft: #cdebe4;
  --link: #327f82;
  --link-strong: #27686a;
  --remote-bg: #fbfaf6;
  --local-bg: #d9eeea;
  --success: #157347;
  --danger: #ff6b6b;
  --body-top: #fbfaf6;
  --header-bg: rgba(247, 245, 239, 0.92);
  --header-border: rgba(216, 221, 214, 0.98);
  --header-button-bg: rgba(255, 253, 250, 0.94);
  --menu-bg: rgba(255, 253, 250, 0.98);
  --help-bg: rgba(255, 253, 250, 0.99);
  --chat-bg: linear-gradient(180deg, #fffdfa, #f8f6f0);
  --composer-bg: #f5f3ed;
  --input-bg: #ffffff;
  --shadow-soft: 0 6px 18px rgba(11, 19, 43, 0.05);
  --shadow-strong: 0 16px 40px rgba(11, 19, 43, 0.12);
  --focus-ring: #4da6a6;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #07101d;
  --panel: #0d1726;
  --panel-soft: #132337;
  --panel-strong: #111d2f;
  --ink: #eef3f7;
  --muted: #b8c6d1;
  --line: #22354a;
  --accent: #cdebe4;
  --accent-ink: #08111f;
  --accent-soft: #20484c;
  --link: #7ec8c8;
  --link-strong: #a6ddda;
  --remote-bg: #111c2a;
  --local-bg: #18353a;
  --success: #4fb987;
  --danger: #ff8f8f;
  --body-top: #0a1422;
  --header-bg: rgba(7, 16, 29, 0.9);
  --header-border: rgba(34, 53, 74, 0.98);
  --header-button-bg: rgba(13, 23, 38, 0.96);
  --menu-bg: rgba(13, 23, 38, 0.98);
  --help-bg: rgba(17, 29, 47, 0.99);
  --chat-bg: linear-gradient(180deg, #0d1726, #09111d);
  --composer-bg: #0a1422;
  --input-bg: #111d2f;
  --shadow-soft: 0 6px 20px rgba(0, 0, 0, 0.28);
  --shadow-strong: 0 18px 44px rgba(0, 0, 0, 0.38);
  --focus-ring: #7ec8c8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(77, 166, 166, 0.16), transparent 30%),
    linear-gradient(180deg, var(--body-top) 0%, var(--bg) 100%);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 40;
  padding: 0.65rem 0.85rem;
  border-radius: 4px;
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  font-weight: 700;
}

.skip-link:focus {
  top: 0.75rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
}

.site-header__inner,
.site-footer__inner {
  width: min(1120px, calc(100% - 1.5rem));
  margin: 0 auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  width: 4rem;
  height: 2rem;
  padding: 0.12rem;
  background: var(--header-button-bg);
  color: var(--ink);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

.theme-toggle__track {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 999px;
  background: var(--panel-soft);
}

.theme-toggle__state {
  position: absolute;
  top: 50%;
  font-size: 0.95rem;
  line-height: 1;
  color: var(--muted);
  transform: translateY(calc(-50% + 1px));
  transition: color 120ms ease, opacity 120ms ease;
}

.theme-toggle__state-sun {
  left: 0.45rem;
}

.theme-toggle__state-moon {
  right: 0.48rem;
}

.theme-toggle__thumb {
  position: absolute;
  top: 0.18rem;
  left: 0.18rem;
  display: block;
  width: 1.28rem;
  height: 1.28rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.22);
  font-size: 1rem;
  line-height: 1.28rem;
  text-align: center;
  transform: translateX(0);
  transition: transform 160ms ease, background 120ms ease;
  padding-top: 1px;
}

.theme-toggle[aria-pressed="true"] .theme-toggle__thumb {
  transform: translateX(2.18rem);
}

.theme-toggle[aria-pressed="false"] .theme-toggle__state-moon,
.theme-toggle[aria-pressed="true"] .theme-toggle__state-sun {
  color: var(--accent);
}

.brandmark {
  display: inline-grid;
  text-decoration: none;
  color: inherit;
  align-items: center;
}

.brandmark__logo {
  display: block;
  height: 2rem;
  width: auto;
}

.brandmark__domain,
.site-header__tagline,
.site-footer__copy {
  color: var(--muted);
}

.brandmark__domain {
  font-size: 0.8rem;
}

.site-header__tagline {
  margin: 0;
  font-size: 0.84rem;
}

.flash {
  width: min(1120px, calc(100% - 1.5rem));
  margin: 0.75rem auto 0;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: color-mix(in srgb, var(--panel) 97%, transparent);
}

.shell {
  width: min(1120px, calc(100% - 1.5rem));
  margin: 0 auto;
  padding: 1rem 0 1.25rem;
}

.hero {
  max-width: 42rem;
  margin-bottom: 2rem;
}

.hero h1,
.room-header h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.15rem, 2.2vw, 1.9rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lede {
  font-size: 1rem;
  line-height: 1.45;
  color: var(--muted);
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: color-mix(in srgb, var(--panel) 96%, transparent);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.75rem;
  box-shadow: var(--shadow-soft);
}

.access-card {
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel-strong) 98%, transparent), color-mix(in srgb, var(--panel-soft) 100%, transparent));
}

.settings-card {
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel-strong) 98%, transparent), color-mix(in srgb, var(--panel-soft) 88%, transparent));
}

.settings-card__header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.55rem;
}

.settings-pill {
  display: inline-flex;
  padding: 0.28rem 0.45rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel-soft);
  color: var(--muted);
  font-size: 0.78rem;
}

.compact-lede {
  font-size: 0.9rem;
  margin-bottom: 0.1rem;
}

.stack {
  display: grid;
  gap: 0.55rem;
}

label {
  font-size: 0.9rem;
  color: var(--muted);
}

input[type="text"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.58rem 0.7rem;
  font: inherit;
  color: var(--ink);
  background: var(--input-bg);
}

input[type="number"],
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.58rem 0.7rem;
  font: inherit;
  color: var(--ink);
  background: var(--input-bg);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 4px;
  padding: 0.56rem 0.8rem;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.9rem;
}

.button-secondary {
  background: var(--panel-soft);
  color: var(--ink);
  border: 1px solid var(--line);
}

.button:hover,
.button:focus-visible {
  filter: brightness(1.02);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: color-mix(in srgb, var(--panel-soft) 68%, var(--accent-soft));
}

.room-shell {
  display: grid;
  gap: 0.75rem;
  align-items: start;
}

.toolbar-pair-grid {
  display: grid;
  gap: 0.5rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.toolbar-group {
  display: grid;
  gap: 0.25rem;
}

.toolbar-group-links {
  justify-items: end;
}

.toolbar-group-actions {
  justify-items: start;
}

.toolbar-label {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.toolbar-label-group {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.toolbar-group-retention {
  align-items: start;
}

.toolbar-retention-form {
  display: grid;
  grid-template-columns: minmax(0, 8rem) auto auto auto;
  gap: 0.35rem;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  min-width: 0;
}

.toolbar-input {
  min-width: 0;
}

.toolbar-retention-form .toolbar-input {
  width: auto;
}

.toolbar-retention-form .select-input.toolbar-input,
.toolbar-retention-form select.toolbar-input {
  width: 100%;
  min-width: 0;
}

.toolbar-input-small {
  width: 4.6rem;
  min-width: 0;
}

.retention-inline-group {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
}

.toolbar-unit {
  font-size: 0.88rem;
  color: var(--muted);
  white-space: nowrap;
}

.button-compact {
  padding: 0.48rem 0.62rem;
  font-size: 0.82rem;
}

.help-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--input-bg);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1;
  cursor: help;
}

.help-popover {
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 0;
  z-index: 120;
  width: 14rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--help-bg);
  box-shadow: var(--shadow-soft);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.35;
  text-transform: none;
  letter-spacing: normal;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 120ms ease;
}

.help-badge:hover .help-popover,
.help-badge:focus .help-popover,
.help-badge:focus-within .help-popover {
  opacity: 1;
  visibility: visible;
}

.utility-grid {
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.utility-card {
  display: grid;
  gap: 0.5rem;
}

.invite-preview-card {
  max-width: 38rem;
  gap: 0.7rem;
}

.invite-preview-card h1 {
  margin: 0;
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.invite-preview-grid {
  display: grid;
  gap: 0.55rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.invite-preview-item {
  display: grid;
  gap: 0.24rem;
}

.invite-preview-form {
  max-width: 22rem;
}

.utility-card-wide {
  grid-column: 1 / -1;
}

.utility-card__header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
}

.invite-link {
  display: block;
  margin-top: 0.75rem;
  word-break: break-all;
  color: var(--ink);
}

.message-list {
  display: grid;
  gap: 0.75rem;
  padding-left: 1.1rem;
}

.chat-card {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 0;
  height: min(72vh, 620px);
  width: 100%;
  padding: 0;
  overflow: visible;
  background: var(--chat-bg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-strong);
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 2.8rem;
  padding: 0.2rem 0.75rem 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
}

.chat-header__main {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
  flex: 1 1 auto;
}

.chat-header__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.chat-header__link-slot {
  min-width: 0;
  flex: 1 1 auto;
}

.chat-header__link-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.45rem;
  align-items: center;
  width: 100%;
  max-width: 40rem;
  margin-left: auto;
  padding: 0.34rem 0.45rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: color-mix(in srgb, var(--panel-strong) 94%, transparent);
}

.chat-header__link-label {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
}

.chat-header__link-input {
  min-width: 0;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 0.9rem;
  padding: 0;
  outline: none;
}

.chat-header__identity {
  font-size: 0.95rem;
  color: var(--muted);
}

.chat-subtitle,
.form-note {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.room-pill {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.24rem 0.45rem;
  color: var(--muted);
  text-transform: capitalize;
  background: color-mix(in srgb, var(--accent-soft) 55%, var(--panel));
  font-size: 0.88rem;
}

.chat-menu {
  position: relative;
}

.chat-menu[open] .chat-menu__trigger {
  background: var(--accent-soft);
}

.chat-menu__trigger {
  list-style: none;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.18rem;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--input-bg);
  cursor: pointer;
}

.chat-menu__trigger::-webkit-details-marker {
  display: none;
}

.chat-menu__trigger span {
  display: block;
  width: 0.9rem;
  height: 2px;
  margin: 0 auto;
  border-radius: 999px;
  background: var(--ink);
}

.chat-menu__panel {
  position: absolute;
  right: 0;
  top: calc(100% + 0.45rem);
  z-index: 80;
  width: min(42rem, calc(100vw - 2rem));
  display: grid;
  gap: 0.5rem;
  padding: 0.65rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--menu-bg);
  box-shadow: var(--shadow-strong);
}

.chat-transcript {
  position: relative;
  min-height: 0;
  overflow: hidden;
  padding: 0.25rem 0;
}

.message-list {
  list-style: none;
  margin: 0;
  padding: 0 0.75rem;
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  align-content: start;
}

.message-row {
  display: grid;
  gap: 0.12rem;
  width: min(74%, 30rem);
  padding: 0.08rem 0;
}

.message-shell {
  display: grid;
  gap: 0.14rem;
  padding: 0.45rem 0.55rem;
  border-radius: 4px;
  background: var(--remote-bg);
  border: 1px solid var(--line);
}

.message-meta {
  display: flex;
  gap: 0.45rem;
  align-items: baseline;
  color: var(--muted);
  font-size: 0.82rem;
}

.message-row-remote {
  justify-self: start;
  text-align: left;
}

.message-row-local {
  justify-self: end;
  text-align: right;
}

.message-row-local .message-meta {
  justify-content: flex-end;
}

.message-row-local .message-shell {
  background: var(--local-bg);
  border-color: color-mix(in srgb, var(--link) 42%, var(--line));
}

.message-row-remote .message-shell {
  background: var(--remote-bg);
}

.message-body {
  line-height: 1.35;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 1rem;
}

.chat-composer {
  display: grid;
  gap: 0.2rem;
  padding: 0.55rem 0.75rem 0.65rem;
  border-top: 1px solid var(--line);
  background: var(--composer-bg);
}

textarea {
  width: 100%;
  min-height: 2.3rem;
  max-height: 7rem;
  resize: none;
  overflow-y: hidden;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.55rem 0.65rem;
  font: inherit;
  line-height: 1.35;
  color: var(--ink);
  background: var(--input-bg);
}

textarea.is-scrollable {
  overflow-y: auto;
}

.composer-footer {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 0.5rem;
}

.composer-footer textarea {
  flex: 1;
}

.chat-send {
  flex: 0 0 auto;
  min-width: 4.4rem;
  padding: 0.52rem 0.7rem;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 0.75rem;
  color: var(--muted);
  font-size: 1rem;
  text-align: center;
  pointer-events: none;
}

.is-hidden {
  display: none;
}

.is-error {
  color: var(--danger);
}

.site-footer {
  padding: 0 0 1.25rem;
}

.site-footer__inner {
  display: grid;
  gap: 0.2rem;
  padding-top: 0.5rem;
}

.site-footer__brand,
.site-footer__copy {
  margin: 0;
}

.site-footer__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.site-footer__links {
  margin: 0.2rem 0 0;
}

.site-footer__links a {
  color: var(--link);
  text-decoration: none;
}

.site-footer__links a:hover {
  text-decoration: underline;
}

.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  color: var(--ink);
}

.site-footer__build {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: right;
  white-space: nowrap;
}

.site-footer__mark {
  width: 1.15rem;
  height: 1.15rem;
}

.legal-shell {
  display: grid;
  gap: 1rem;
}

.legal-card {
  display: grid;
  gap: 0.65rem;
}

.retention-form {
  display: grid;
  gap: 0.55rem;
}

.field-row {
  display: grid;
  gap: 0.55rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field-group {
  display: grid;
  gap: 0.24rem;
}

.retention-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.retention-actions .form-note {
  margin: 0;
}

.retention-actions__controls {
  display: flex;
  justify-content: flex-end;
}

.link-row {
  display: grid;
  gap: 0.3rem;
}

.link-chip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.45rem;
  align-items: center;
  padding: 0.42rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: color-mix(in srgb, var(--panel-strong) 94%, transparent);
}

.link-chip__text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.9rem;
  color: var(--ink);
}

.button-copy {
  min-width: 4.8rem;
  padding: 0.48rem 0.62rem;
  font-size: 0.82rem;
}

.menu-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  justify-content: flex-end;
  width: 100%;
}

.menu-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.menu-actions form {
  margin: 0;
}

.menu-link {
  color: var(--link);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
}

.menu-link:hover {
  text-decoration: underline;
}

.legal-card h2,
.legal-card p {
  margin: 0;
}

.legal-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.45rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.help-badge:focus-visible,
.menu-link:focus-visible,
.theme-toggle:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .site-header__inner {
    flex-direction: column;
    align-items: start;
  }

  .settings-card__header,
  .field-row {
    grid-template-columns: 1fr;
  }

  .utility-grid {
    grid-template-columns: 1fr;
  }

  .invite-preview-grid {
    grid-template-columns: 1fr;
  }

  .utility-card-wide {
    grid-column: auto;
  }

  .toolbar-pair-grid,
  .chat-menu__panel {
    grid-template-columns: 1fr;
  }

  .toolbar-retention-form {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
  }

  .chat-header {
    align-items: center;
  }

  .chat-header__main {
    flex-direction: column;
    align-items: stretch;
  }

  .chat-header__link-bar {
    max-width: none;
    margin-left: 0;
  }

  .chat-card {
    height: min(82vh, 700px);
  }

  .message-row {
    width: min(90%, 34rem);
  }

  .link-chip,
  .retention-actions {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .chat-menu__panel {
    right: -0.1rem;
    left: auto;
    width: min(24rem, calc(100vw - 1.5rem));
  }
}