* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color tokens */
  --bg: #060a18;
  --surface: rgba(10, 16, 38, 0.55);
  --border: rgba(255, 255, 255, 0.16);
  --hairline: rgba(255, 255, 255, 0.08);
  --text: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.72);
  --text-faint: rgba(255, 255, 255, 0.45);
  --royal: #4169e1;
  --royal-deep: #2b4bc4;
  --royal-soft: rgba(65, 105, 225, 0.35);
  --royal-tint: rgba(65, 105, 225, 0.14);
  --link: #7d9bf0;
  --error: #ff6b6b;
  --success: #4ade80;

  /* Type scale (minor third-ish) */
  --fs-xs: 11px;
  --fs-sm: 13px;
  --fs-base: 15px;
  --fs-md: 16px;
  --fs-lg: clamp(24px, 5vw, 32px);
  --fs-xl: clamp(34px, 7vw, 48px);

  /* Spacing scale */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 16px;
  --sp-4: 24px;
  --sp-5: 40px;
  --sp-6: 64px;

  --radius: 10px;
  --radius-lg: 16px;
  --shadow-text: 0 1px 12px rgba(0, 0, 0, 0.5);
}

html,
body {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-x: hidden;
}

/* Full-bleed video backdrop */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--bg) url("/media/bg-poster.jpg") center / cover no-repeat;
}

.backdrop video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.backdrop-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(6, 10, 24, 0.42) 0%, rgba(6, 10, 24, 0.78) 100%),
    linear-gradient(180deg, rgba(6, 10, 24, 0.25) 0%, rgba(6, 10, 24, 0.65) 100%);
}

@media (prefers-reduced-motion: reduce) {
  .backdrop video {
    display: none;
  }
}

.hero {
  width: 100%;
  max-width: 560px;
  text-align: center;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  margin-bottom: 36px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand-mark svg {
  width: clamp(140px, 30vw, 210px);
  height: auto;
  filter: drop-shadow(0 0 32px var(--royal-soft))
    drop-shadow(0 8px 40px rgba(0, 0, 0, 0.45));
}

.brand-name {
  font-size: var(--fs-xl);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--text);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
}

h1 {
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.5);
}

.tagline {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 32px;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5);
}

#signup-form {
  display: flex;
  gap: 10px;
  padding: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.35);
}

#email {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
  padding: 13px 16px;
  outline: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}

#email::placeholder {
  color: var(--text-muted);
}

#email:focus {
  border-color: var(--royal);
  background: rgba(6, 10, 24, 0.45);
}

#submit-btn {
  background: linear-gradient(180deg, var(--royal) 0%, var(--royal-deep) 100%);
  border: none;
  border-radius: 10px;
  color: #ffffff;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 24px;
  transition: filter 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
  box-shadow: 0 4px 20px var(--royal-soft);
}

#submit-btn:hover {
  filter: brightness(1.12);
  box-shadow: 0 4px 28px rgba(65, 105, 225, 0.55);
}

#submit-btn:disabled {
  opacity: 0.6;
  cursor: default;
  filter: none;
}

#form-message {
  min-height: 22px;
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-muted);
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.5);
}

#form-message.error {
  color: var(--error);
}

#form-message.success {
  color: var(--success);
}

footer {
  margin-top: var(--sp-6);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--hairline);
  color: var(--text-faint);
  font-size: var(--fs-sm);
  text-shadow: var(--shadow-text);
}

.footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-2);
}

.footer-links span {
  color: var(--text-faint);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--text);
}

footer p a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

footer p a:hover {
  color: var(--text);
}

/* Alpha badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
  padding: 6px 14px;
  border: 1px solid var(--royal-soft);
  border-radius: 999px;
  background: var(--royal-tint);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

/* Legal pages (privacy, terms) */
body.legal-page {
  display: block;
  overflow-y: auto;
}

.legal {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 0 72px;
}

.legal .brand {
  flex-direction: row;
  gap: 10px;
  margin-bottom: 40px;
}

.legal .brand a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.legal .brand-mark svg {
  width: 34px;
  filter: none;
}

.legal .brand-name {
  font-size: 22px;
  font-weight: 700;
  text-shadow: none;
}

.legal h1 {
  font-size: 30px;
  text-align: left;
  margin-bottom: 6px;
}

.legal .updated {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 36px;
}

.legal h2 {
  font-size: 19px;
  font-weight: 600;
  margin: 32px 0 10px;
}

.legal p,
.legal ul {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 14px;
}

.legal ul {
  padding-left: 22px;
}

.legal a {
  color: var(--link);
}

.legal footer {
  margin-top: var(--sp-6);
  text-align: center;
}

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

@media (max-width: 480px) {
  #signup-form {
    flex-direction: column;
    padding: 12px;
  }

  #submit-btn {
    width: 100%;
  }
}