:root {
  --auth-bg: #0f0f14;
  --auth-card: #18181f;
  --auth-border: #2a2a35;
  --auth-text: #e4e4e9;
  --auth-muted: #8b8b9a;
  --auth-accent: #00d4aa;
  --auth-accent-dim: #00a884;
  --auth-alert: #ff6b6b;
  --auth-radius: 12px;
}

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

body.auth-page {
  font-family: 'Inter', sans-serif;
  color: var(--auth-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  /* Багатошаровий тактичний фон: teal-сяйво по центру + віньєтка по краях. */
  background:
    radial-gradient(ellipse 70% 55% at 50% 42%, rgba(0, 212, 170, 0.12), transparent 70%),
    radial-gradient(circle at 50% 45%, transparent 55%, rgba(0, 0, 0, 0.6) 100%),
    var(--auth-bg);
}

/* Шар 1 — технічна сітка, згасає до країв. */
body.auth-page::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 212, 170, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 170, 0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(ellipse 65% 65% at 50% 44%, #000 25%, transparent 80%);
  mask-image: radial-gradient(ellipse 65% 65% at 50% 44%, #000 25%, transparent 80%);
}

/* Шар 2 — концентричні радарні кільця з повільним пульсом. */
body.auth-page::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: repeating-radial-gradient(circle at 50% 44%, transparent 0 84px, rgba(0, 212, 170, 0.07) 84px 85px);
  -webkit-mask-image: radial-gradient(circle at 50% 44%, #000 0%, transparent 58%);
  mask-image: radial-gradient(circle at 50% 44%, #000 0%, transparent 58%);
  animation: authRadarPulse 7s ease-in-out infinite;
}

@keyframes authRadarPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* Шар 3 — радарний клин у круглому диску: чіткий передній край + затухаючий
   хвіст-афтерглоу. Контейнерний (фіксований розмір) — читається як промінь,
   а не прямокутник на весь екран. */
html::before {
  content: '';
  position: fixed;
  top: 44%;
  left: 50%;
  width: 780px;
  height: 780px;
  margin: -390px 0 0 -390px;
  z-index: 0;
  pointer-events: none;
  border-radius: 50%;
  transform-origin: 50% 50%;
  will-change: transform;
  background: conic-gradient(from 0deg,
    transparent 0deg,
    transparent 252deg,
    rgba(0, 212, 170, 0.03) 300deg,
    rgba(0, 212, 170, 0.10) 340deg,
    rgba(0, 212, 170, 0.30) 356deg,
    rgba(0, 212, 170, 0.62) 360deg);
  -webkit-mask-image: radial-gradient(circle, #000 12%, rgba(0,0,0,0.85) 55%, transparent 100%);
  mask-image: radial-gradient(circle, #000 12%, rgba(0,0,0,0.85) 55%, transparent 100%);
  animation: authRadarSweep 6s linear infinite;
}

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

/* HUD-обрамлення: тонкі teal-кутики по краях екрана. */
html::after {
  content: '';
  position: fixed;
  inset: 20px;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--auth-accent), var(--auth-accent)) 0 0 / 22px 1px no-repeat,
    linear-gradient(var(--auth-accent), var(--auth-accent)) 0 0 / 1px 22px no-repeat,
    linear-gradient(var(--auth-accent), var(--auth-accent)) 100% 0 / 22px 1px no-repeat,
    linear-gradient(var(--auth-accent), var(--auth-accent)) 100% 0 / 1px 22px no-repeat,
    linear-gradient(var(--auth-accent), var(--auth-accent)) 0 100% / 22px 1px no-repeat,
    linear-gradient(var(--auth-accent), var(--auth-accent)) 0 100% / 1px 22px no-repeat,
    linear-gradient(var(--auth-accent), var(--auth-accent)) 100% 100% / 22px 1px no-repeat,
    linear-gradient(var(--auth-accent), var(--auth-accent)) 100% 100% / 1px 22px no-repeat;
  opacity: 0.3;
}

/* Блипи-сенсори: яскраві teal-цятки, що спалахують і згасають (контакти радара). */
.auth-blip {
  position: fixed;
  z-index: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--auth-accent);
  box-shadow: 0 0 6px 2px rgba(0, 212, 170, 0.75), 0 0 14px 4px rgba(0, 212, 170, 0.3);
  opacity: 0;
  pointer-events: none;
  animation: authBlip 7s ease-in-out infinite;
}

@keyframes authBlip {
  0%, 100% { opacity: 0; transform: scale(0.4); }
  6% { opacity: 1; transform: scale(1.15); }
  14% { opacity: 0.85; transform: scale(1); }
  34% { opacity: 0; transform: scale(0.85); }
}

@media (prefers-reduced-motion: reduce) {
  body.auth-page::after,
  html::before,
  .auth-blip { animation: none; }
  .auth-blip { opacity: 0.4; }
}

.auth-card {
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, rgba(30, 30, 41, 0.92), rgba(20, 20, 27, 0.96));
  border: 1px solid var(--auth-border);
  border-radius: var(--auth-radius);
  padding: 2.25rem 2rem 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(0, 212, 170, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  overflow: hidden;
}

/* Акцентна лінія зверху картки. */
.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 22px;
  right: 22px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--auth-accent), transparent);
  opacity: 0.75;
}

.auth-card.auth-card--compact {
  max-width: 360px;
}

.auth-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  text-align: center;
}

.auth-logo {
  width: 144px;
  height: 144px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 0 20px rgba(0, 212, 170, 0.35));
}

/* OPSEC-футер під карткою — заземлює низ і додає контекст. */
.auth-footer {
  position: relative;
  z-index: 1;
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--auth-muted);
  opacity: 0.65;
}

.auth-footer::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--auth-accent);
  box-shadow: 0 0 8px var(--auth-accent);
}

.auth-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.auth-subtitle {
  color: var(--auth-muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.auth-form label,
.auth-field-label {
  display: block;
  font-size: 0.85rem;
  color: var(--auth-muted);
  margin-bottom: 0.35rem;
}

.auth-form input {
  width: 100%;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  background: var(--auth-bg);
  border: 1px solid var(--auth-border);
  color: var(--auth-text);
  padding: 0.65rem 0.85rem;
  border-radius: var(--auth-radius);
  margin-bottom: 1rem;
}

.auth-form input:focus {
  outline: none;
  border-color: var(--auth-accent);
}

.auth-error {
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid var(--auth-alert);
  color: var(--auth-alert);
  font-size: 0.85rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--auth-radius);
  margin-bottom: 1rem;
}

.auth-btn {
  width: 100%;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  background: var(--auth-accent);
  color: var(--auth-bg);
  border: none;
  padding: 0.75rem;
  border-radius: var(--auth-radius);
  cursor: pointer;
}

.auth-btn:hover { background: var(--auth-accent-dim); }
.auth-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.auth-btn-secondary {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.65rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  background: transparent;
  color: var(--auth-accent);
  border: 1px solid var(--auth-accent);
  border-radius: var(--auth-radius);
  cursor: pointer;
}

.auth-btn-secondary:hover { background: rgba(0, 212, 170, 0.1); }
.auth-btn-secondary:disabled { opacity: 0.6; cursor: not-allowed; }

.auth-divider {
  display: flex;
  align-items: center;
  margin: 1rem 0;
  color: var(--auth-muted);
  font-size: 0.85rem;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--auth-border);
}

.auth-divider span {
  background: var(--auth-card);
  padding: 0 0.5rem;
}

.auth-hint {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--auth-muted);
  line-height: 1.45;
}

.auth-back-link {
  margin-top: 1rem;
  font-size: 0.85rem;
}

.auth-back-link a {
  color: var(--auth-muted);
  text-decoration: none;
}

.auth-back-link a:hover { color: var(--auth-accent); }