:root {
  --accent-color: #ff8888;
  --accent-strong: color-mix(in srgb, var(--accent-color) 85%, white 15%);
  --accent-soft: color-mix(in srgb, var(--accent-color) 40%, white 10%);
  --accent-glow: color-mix(in srgb, var(--accent-color) 35%, transparent);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.78);
  --bg-dark-overlay: rgba(0, 0, 0, 0.55);
  --radius-ui: 24px;
  --input-bg: rgba(255, 255, 255, 0.06);
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background-color: #000;
  font-family: 'Noto Sans TC', 'Inter', system-ui, sans-serif;
  color: var(--text-primary);
  overflow: hidden;
  animation: fadeIn 0.8s ease-out;
}

.full-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
}

.full-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(60%) grayscale(18%) blur(4px);
  transform: scale(1.03);
}

.full-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--accent-color) 8%, transparent),
      transparent 40%
    ),
    var(--bg-dark-overlay);
  z-index: -1;
}

.login-shell {
  width: 100%;
  max-width: 420px;
  padding: 40px 32px;
  position: relative;
  z-index: 10;
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: var(--radius-ui);
  border: 1px solid color-mix(in srgb, var(--accent-color) 28%, white 15%);
  box-shadow: 0 18px 60px color-mix(in srgb, var(--accent-color) 15%, black 20%);
  animation: fadeInScale 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.login-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent-strong);
  margin-bottom: 8px;
  text-align: center;
  text-shadow: 0 0 15px var(--accent-glow);
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 32px;
  text-align: center;
  line-height: 1.6;
}

.auth-input {
  width: 100%;
  padding: 12px 16px;
  margin-bottom: 16px;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--accent-color) 24%, white 20%);
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: all 0.2s ease;
}

.auth-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.auth-input:focus {
  border-color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 15px var(--accent-glow);
}

.login-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  align-items: center;
}

.primary-btn {
  padding: 12px 20px;
  font-weight: 700;
  font-size: 15px;
  border: none;
  border-radius: 12px;
  background: var(--accent-strong);
  color: #1a1a1a;
  cursor: pointer;
  transition:
    transform 0.1s,
    background 0.2s,
    box-shadow 0.2s;
  flex: 1;
}

.primary-btn:hover {
  background: color-mix(in srgb, var(--accent-color) 92%, white 8%);
  box-shadow: 0 4px 12px var(--accent-glow);
  transform: translateY(-1px);
}

.primary-btn:active {
  transform: scale(0.98);
}

.back-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.05);
}

.back-link:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.status-text {
  min-height: 20px;
  font-size: 13px;
  color: var(--accent-soft);
  margin-top: 16px;
  text-align: center;
  font-weight: 500;
  text-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}