:root {
  color-scheme: dark;
  font-family: Inter, Geist, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #070707;
  color: #f4f4f1;
  --line: rgba(255, 255, 255, 0.12);
  --muted: rgba(255, 255, 255, 0.55);
  --soft: rgba(255, 255, 255, 0.035);
  --orange: #ff7a1a;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 18% 24%, rgba(255, 122, 26, 0.14), transparent 30%),
    radial-gradient(circle at 82% 75%, rgba(76, 96, 255, 0.09), transparent 30%),
    #070707;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, #000, transparent 82%);
}

.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  padding: 0 clamp(22px, 4vw, 64px);
  border-bottom: 1px solid var(--line);
}

.brand,
.home-link {
  color: inherit;
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  letter-spacing: 0.16em;
}

.brand-mark {
  font-size: 18px;
  font-weight: 700;
}

.brand-name {
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
}

.home-link {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  transition: color 160ms ease;
}

.home-link:hover {
  color: #fff;
}

.auth-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 520px);
  gap: clamp(50px, 8vw, 150px);
  width: min(1320px, calc(100% - 44px));
  min-height: calc(100vh - 82px);
  margin: 0 auto;
  padding: clamp(62px, 10vh, 120px) 0;
  align-items: center;
}

.auth-copy {
  max-width: 680px;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 22px;
  color: var(--orange);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.18em;
}

.auth-copy h1 {
  margin: 0;
  font-size: clamp(46px, 6vw, 86px);
  font-weight: 390;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.intro {
  max-width: 590px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.room-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 50px;
  border: 1px solid var(--line);
  background: var(--line);
}

.room-list span {
  min-height: 54px;
  padding: 18px;
  background: #090909;
  color: rgba(255, 255, 255, 0.72);
  font-size: 10px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.account-panel {
  min-height: 590px;
  border: 1px solid var(--line);
  background: rgba(13, 13, 13, 0.86);
  box-shadow: 0 35px 110px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(22px);
}

.panel-state {
  padding: clamp(30px, 5vw, 54px);
}

.panel-state[hidden],
.register-only[hidden] {
  display: none !important;
}

#loading-view,
#unavailable-view,
#session-view {
  min-height: 590px;
  align-content: center;
  text-align: center;
}

.spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-top-color: var(--orange);
  border-radius: 50%;
  animation: spin 900ms linear infinite;
}

.mode-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 4px;
  border: 1px solid var(--line);
  background: #080808;
}

.mode-tab {
  min-height: 42px;
  border: 0;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.mode-tab.is-active {
  color: #090909;
  background: #f1f1ed;
}

.panel-heading {
  margin: 38px 0 30px;
}

.panel-heading .panel-kicker {
  margin-bottom: 14px;
}

.panel-heading h2,
#session-view h2,
#unavailable-view h2 {
  margin: 0;
  font-size: 28px;
  font-weight: 470;
  letter-spacing: -0.025em;
}

.panel-heading > p:last-child,
.session-note,
#unavailable-view > p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.field {
  display: grid;
  gap: 9px;
  margin-bottom: 17px;
}

.field span {
  color: rgba(255, 255, 255, 0.68);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.field input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 0;
  outline: none;
  color: #fff;
  background: #080808;
  transition: border-color 160ms ease, background 160ms ease;
}

.field input:focus {
  border-color: rgba(255, 122, 26, 0.72);
  background: #0b0b0b;
}

.field input::placeholder {
  color: rgba(255, 255, 255, 0.26);
}

.consent {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 22px 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.consent input {
  margin-top: 3px;
  accent-color: var(--orange);
}

.primary-button,
.secondary-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 49px;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease, background 160ms ease;
}

.primary-button {
  color: #0a0a0a;
  background: #f3f3ef;
  font-weight: 620;
}

.secondary-button {
  margin-top: 12px;
  border-color: var(--line);
  color: rgba(255, 255, 255, 0.74);
  background: transparent;
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.primary-button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
  transform: none;
}

.form-message {
  margin: 0 0 14px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 118, 92, 0.28);
  color: #ffb4a3;
  background: rgba(124, 28, 15, 0.18);
  font-size: 12px;
  line-height: 1.5;
}

.future-providers {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.future-providers p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.future-providers div {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.future-providers button {
  min-height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.28);
  background: transparent;
}

.test-account-note {
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.34);
  font-size: 10px;
  line-height: 1.65;
}

.account-avatar {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  margin: 0 auto 22px;
  border: 1px solid rgba(255, 122, 26, 0.45);
  border-radius: 50%;
  color: #ffb174;
  background: rgba(255, 122, 26, 0.08);
  font-size: 25px;
}

.account-handle {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.42);
  font-size: 12px;
}

.session-note {
  margin: 24px auto 34px;
  max-width: 330px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 900px) {
  .auth-shell {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-top: 56px;
  }

  .auth-copy {
    max-width: 720px;
  }

  .account-panel {
    width: min(100%, 560px);
    margin: 0 auto;
  }
}

@media (max-width: 560px) {
  .site-header {
    min-height: 68px;
  }

  .auth-shell {
    width: min(100% - 28px, 520px);
    min-height: calc(100vh - 68px);
    padding: 42px 0;
  }

  .auth-copy h1 {
    font-size: clamp(42px, 14vw, 62px);
  }

  .room-list,
  .future-providers div {
    grid-template-columns: 1fr;
  }

  .account-panel,
  #loading-view,
  #unavailable-view,
  #session-view {
    min-height: 540px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}