:root {
  --bg: #050505;
  --card: rgba(18, 18, 18, 0.82);
  --card-border: rgba(255, 255, 255, 0.1);
  --text: #f5f5f5;
  --muted: #a7a7a7;
  --danger: #ff4d4d;
  --danger-soft: rgba(255, 77, 77, 0.08);
  --danger-border: rgba(255, 77, 77, 0.28);
  --danger-text: #ffb3b3;
  --accent: #ffffff;
  --button-dark: #1f1f1f;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  padding: 32px 18px;

  display: flex;
  align-items: center;
  justify-content: center;

  font-family: "Roboto", sans-serif;
  color: var(--text);

  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.09), transparent 34%),
    radial-gradient(circle at bottom left, rgba(120, 120, 120, 0.12), transparent 30%),
    linear-gradient(rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.75)),
    url("/assets/img/bg.jpg") center / cover no-repeat,
    linear-gradient(180deg, #111 0%, var(--bg) 100%);
}

.portal {
  width: min(100%, 720px);
  text-align: center;
}

.card {
  padding: 42px 34px;
  border: 1px solid var(--card-border);
  border-radius: 28px;
  background: var(--card);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.logo {
  width: min(250px, 70%);
  height: auto;
  margin-bottom: 28px;
  user-select: none;
  -webkit-user-drag: none;
  filter: drop-shadow(0 14px 32px rgba(0, 0, 0, 0.45));
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.05em;
}

.notice {
  max-width: 590px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 0.98rem;
  font-weight: 300;
  line-height: 1.7;
}

.backup-alert {
  max-width: 560px;
  margin: 28px auto 0;
  padding: 14px 16px;
  border: 1px solid var(--danger-border);
  border-radius: 16px;
  background: var(--danger-soft);
  color: var(--danger-text);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.5;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-width: 150px;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;

  font-size: 0.96rem;
  font-weight: 700;
  text-decoration: none;

  transition:
    transform 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    opacity 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-agree {
  background: var(--accent);
  color: #000;
}

.btn-disagree {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--button-dark);
  color: var(--text);
}

.help {
  display: inline-block;
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.help:hover {
  color: var(--text);
}

.footer {
  margin-top: 22px;
  color: #666;
  font-size: 0.78rem;
}

@media (max-width: 520px) {
  body {
    align-items: flex-start;
    padding-top: 36px;
  }

  .card {
    padding: 34px 22px;
    border-radius: 24px;
  }

  .actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}