:root {
  color-scheme: dark;
  --bg: #06070a;
  --ink: #f7f8ff;
  --muted: #9aa3b5;
  --line: rgba(255, 255, 255, 0.14);
  --acid: #b8ff2c;
  --cyan: #2ee8ff;
  --font: "Space Grotesk", "Noto Sans SC", system-ui, sans-serif;
  --display: "Syne", "Space Grotesk", "Noto Sans SC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 50% 40% at 20% 10%, rgba(184, 255, 44, 0.12), transparent 55%),
    radial-gradient(ellipse 45% 35% at 90% 80%, rgba(46, 232, 255, 0.1), transparent 50%),
    var(--bg);
}

.back-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  color: var(--muted);
  text-decoration: none;
  font-weight: 700;
}

.back-link:hover {
  color: var(--acid);
}

.auth-shell {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 4rem 1rem 2rem;
}

.auth-card {
  width: min(26rem, 100%);
  padding: 1.4rem 1.35rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(12, 14, 20, 0.92);
  backdrop-filter: blur(12px);
}

.auth-brand {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  margin-bottom: 1.2rem;
}

.mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--acid), var(--cyan));
  color: #041006;
  font-weight: 800;
  font-size: 0.78rem;
}

.auth-brand strong {
  display: block;
  font-family: var(--display);
  font-size: 1.2rem;
}

.auth-brand p {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  margin-bottom: 1rem;
  padding: 0.3rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.auth-tab {
  border: 0;
  border-radius: 999px;
  padding: 0.55rem;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.auth-tab.active {
  background: var(--acid);
  color: #061006;
}

.auth-form {
  display: grid;
  gap: 0.8rem;
}

.auth-form[hidden] {
  display: none !important;
}

.auth-form label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 650;
}

.auth-form input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
  background: rgba(0, 0, 0, 0.28);
  color: var(--ink);
  font: inherit;
}

.auth-form input:focus {
  outline: 2px solid rgba(184, 255, 44, 0.45);
  outline-offset: 1px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  width: 100%;
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1rem;
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.btn-primary {
  background: var(--acid);
  color: #061006;
}

.btn-google {
  margin-top: 0.2rem;
  border: 1px solid var(--line);
  background: #fff;
  color: #1f1f1f;
}

.g-icon {
  display: grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  background: #4285f4;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
}

.divider {
  display: grid;
  place-items: center;
  margin: 1rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.divider::before {
  content: "";
  grid-area: 1 / 1;
  width: 100%;
  height: 1px;
  background: var(--line);
}

.divider span {
  grid-area: 1 / 1;
  padding: 0 0.6rem;
  background: #0c0e14;
}

.hint {
  min-height: 1.3rem;
  margin: 0.75rem 0 0;
  color: var(--cyan);
  font-size: 0.84rem;
}

.hint.is-error {
  color: #ff8f7a;
}

.admin-hint {
  margin-top: 1.1rem;
  padding: 0.85rem 0.9rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  display: grid;
  gap: 0.35rem;
}

.admin-hint strong {
  color: var(--ink);
}

.admin-hint code {
  color: var(--acid);
  font-size: 0.86rem;
}

.admin-hint a {
  color: var(--cyan);
  text-decoration: none;
  font-weight: 700;
}