* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "Microsoft YaHei UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  position: relative;
  overflow: hidden;
}

.auth-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: #f4f5f8;
}

.auth-bg::after {
  display: none;
}

.auth-panel {
  position: relative;
  z-index: 1;
  width: 420px;
  max-width: 100%;
  color: var(--yy-text);
  padding: 32px 32px 28px;
  background: var(--yy-surface);
  border: 1px solid var(--yy-border);
  border-radius: 20px;
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  box-shadow: var(--yy-shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--yy-accent-grad);
  border: 1px solid var(--yy-border);
  box-shadow: 0 4px 14px color-mix(in srgb, var(--yy-accent) 25%, transparent);
}

.brand-name { font-size: 17px; font-weight: 600; color: var(--yy-text); }

h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.35;
  color: var(--yy-text);
}

h1 span {
  font-size: 12px;
  font-weight: 600;
  color: var(--yy-accent);
  vertical-align: middle;
  margin-left: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--yy-code-bg);
  border: 1px solid color-mix(in srgb, var(--yy-accent) 25%, transparent);
}

.subtitle {
  color: var(--yy-text-muted);
  margin-bottom: 22px;
  font-size: 14px;
  line-height: 1.6;
}

label {
  display: block;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--yy-text-muted);
  font-weight: 600;
}

input {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 12px 14px;
  border: 1px solid var(--yy-border-input);
  border-radius: 10px;
  background: var(--yy-input-bg);
  color: var(--yy-text);
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input::placeholder { color: var(--yy-text-muted); opacity: 0.75; }

input:focus {
  outline: none;
  border-color: var(--yy-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--yy-accent) 15%, transparent);
}

.pwd-wrap { position: relative; margin-top: 8px; }
.pwd-wrap input { margin-top: 0; padding-right: 44px; }

.eye-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 16px;
  opacity: 0.55;
  color: var(--yy-text-muted);
}

.btn-primary {
  width: 100%;
  margin-top: 8px;
  padding: 13px;
  border: none;
  border-radius: 12px;
  background: var(--yy-accent-grad);
  color: var(--yy-btn-text);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 6px 20px color-mix(in srgb, var(--yy-accent) 28%, transparent);
}

.btn-primary:hover { transform: translateY(-1px); }

.hint {
  margin-top: 14px;
  font-size: 12px;
  color: var(--yy-text-muted);
  line-height: 1.6;
}

.switch { margin-top: 18px; text-align: center; color: var(--yy-text-muted); font-size: 14px; }
.switch a { color: var(--yy-accent); text-decoration: none; }

.error {
  margin-top: 14px;
  color: #dc2626;
  font-size: 14px;
  text-align: center;
  padding: 10px;
  border-radius: 8px;
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.15);
}

.hidden { display: none !important; }

@media (max-width: 768px) {
  .auth-page { justify-content: center; padding: 24px; }
}