:root {
  color-scheme: dark;
  --bg: #050a0c;
  --panel: rgba(18, 28, 33, .92);
  --panel-deep: #0a1115;
  --line: #30404a;
  --line-soft: rgba(86, 113, 125, .32);
  --text: #f2f5f6;
  --muted: #a8b4bc;
  --accent: #17cbd0;
  --accent-2: #24afbe;
  --danger: #ff8585;
  --success: #75e1ba;
  --radius: 25px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 78% 5%, rgba(13, 107, 113, .28), transparent 34rem),
    linear-gradient(135deg, #020708 0%, #061114 58%, #071b1f 100%);
  overflow-x: hidden;
}
button, input, select { font: inherit; }
a { color: inherit; }
[hidden] { display: none !important; }

.page-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(23, 203, 208, .025), transparent);
}

.site-header {
  width: min(1140px, calc(100% - 40px));
  margin: 0 auto;
  padding: 30px 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-size: clamp(1.35rem, 2vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -.055em;
}
.brand strong { color: var(--accent); }
.brand-mark { width: 42px; height: 42px; object-fit: cover; border-radius: 10px; mix-blend-mode: screen; }
.language-picker select {
  min-width: 92px;
  padding: 11px 38px 11px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  color: var(--muted);
  background: #10191e;
  cursor: pointer;
}

.auth-main {
  width: min(800px, calc(100% - 32px));
  margin: 52px auto 72px;
  text-align: center;
}
.hero { margin-bottom: 36px; }
.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-weight: 800;
  font-size: .77rem;
  letter-spacing: .28em;
}
h1 {
  margin: 0;
  font-size: clamp(2.9rem, 8vw, 5rem);
  line-height: .98;
  letter-spacing: -.06em;
}
.lead {
  max-width: 650px;
  margin: 22px auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.55;
}

.auth-card {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(21, 32, 38, .95), rgba(10, 17, 21, .97));
  box-shadow: 0 26px 70px rgba(0, 0, 0, .34);
  text-align: left;
}
.field-label { margin-bottom: 9px; }
.field-label span { display: block; }
.label-kicker,
.session-code-row span {
  color: #9aa8b0;
  font-size: .75rem;
  letter-spacing: .13em;
}
.field-label span:last-child { color: var(--muted); font-size: .94rem; }

label { display: block; margin-top: 18px; }
label > span {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: .87rem;
}
input,
select {
  width: 100%;
  border: 1px solid #31424b;
  border-radius: 12px;
  color: var(--text);
  background: #071014;
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
input { min-height: 54px; padding: 13px 15px; }
input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(23, 203, 208, .16);
  background: #081418;
}
input::placeholder { color: #748188; }
.code-input-wrap { margin: 0; }
.code-input-wrap input {
  min-height: 58px;
  font-size: 1.05rem;
  letter-spacing: .02em;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(23, 203, 208, .13);
}

.primary-button {
  width: 100%;
  min-height: 56px;
  margin-top: 23px;
  border: 0;
  border-radius: 12px;
  color: #021114;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  font-weight: 800;
  cursor: pointer;
  transition: transform .15s ease, filter .15s ease, opacity .15s ease;
}
.primary-button:hover { filter: brightness(1.07); }
.primary-button:active { transform: translateY(1px); }
.primary-button:disabled { cursor: wait; opacity: .65; }
.text-button {
  border: 0;
  color: var(--accent);
  background: transparent;
  font-weight: 700;
  cursor: pointer;
}

.form-message {
  min-height: 1.35em;
  margin: 10px 0 -9px;
  color: var(--danger);
  font-size: .86rem;
}
.source-card h2,
.success-card h2 {
  margin: 26px 0 18px;
  font-size: 1.65rem;
  letter-spacing: -.035em;
}
.session-code-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
}
.session-code-row strong {
  display: block;
  margin-top: 4px;
  color: var(--text);
  font-size: 1.25rem;
  letter-spacing: .08em;
}
.source-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 5px;
  border-radius: 13px;
  background: #071014;
}
.source-tabs button {
  min-height: 43px;
  border: 1px solid transparent;
  border-radius: 9px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}
.source-tabs button[aria-selected="true"] {
  border-color: rgba(23, 203, 208, .45);
  color: var(--text);
  background: rgba(23, 203, 208, .13);
}
.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.success-card { text-align: center; }
.success-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(117, 225, 186, .46);
  border-radius: 50%;
  color: var(--success);
  background: rgba(117, 225, 186, .1);
  font-size: 1.55rem;
  font-weight: 900;
}
.success-card p { color: var(--muted); line-height: 1.6; }
.privacy-note {
  max-width: 690px;
  margin: 26px auto 0;
  color: #9aa8b0;
  font-size: .83rem;
  line-height: 1.6;
}
.legal-link { margin-top: 7px; font-size: .8rem; }
.legal-link a { color: var(--muted); text-underline-offset: 4px; }

.skip-link {
  position: fixed;
  left: 12px;
  top: -80px;
  z-index: 20;
  padding: 10px 14px;
  color: #001315;
  background: var(--accent);
  border-radius: 8px;
}
.skip-link:focus { top: 12px; }
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

html[dir="rtl"] body { font-family: Tahoma, Arial, sans-serif; }
html[dir="rtl"] .auth-card { text-align: right; }
html[dir="rtl"] .session-code-row { direction: rtl; }
html[dir="rtl"] input { text-align: right; }
html[dir="rtl"] .code-input-wrap input { direction: ltr; text-align: left; }

@media (max-width: 640px) {
  .site-header { width: min(100% - 28px, 1140px); padding-top: 20px; }
  .auth-main { width: min(100% - 22px, 800px); margin-top: 36px; }
  .hero { margin-bottom: 26px; }
  .auth-card { padding: 23px 18px; border-radius: 20px; }
  .two-columns { grid-template-columns: 1fr; gap: 0; }
  .source-tabs { grid-template-columns: 1fr; }
  h1 { font-size: clamp(2.65rem, 15vw, 4rem); }
}

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