/* 航空科技风 · 简约 */
:root {
  --bg-deep: #0a0e14;
  --bg-panel: #0d1219;
  --bg-input: rgba(18, 25, 35, 0.9);
  --border: #1e2a3a;
  --border-focus: #00d4aa;
  --text: #e6edf3;
  --text-muted: #7d8a99;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --glow: 0 0 20px rgba(0, 212, 170, 0.15);
  --font-display: 'Orbitron', sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-deep);
  color: var(--text);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  position: relative;
  overflow-x: hidden;
}

/* 背景网格 */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 170, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 170, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}

/* 扫描线 */
.scanline {
  position: fixed;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(0, 212, 170, 0.02) 50%,
    transparent 100%
  );
  background-size: 100% 6px;
  animation: scan 8s linear infinite;
  pointer-events: none;
  z-index: 1;
}

@keyframes scan {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100%); }
}

/* 主面板 */
.panel {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 400px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  box-shadow: var(--glow);
}

/* 登录/注册 与 忘记密码 互斥显示，同一时间只显示一个视图 */
.panel-view-forgot {
  display: none;
}
.panel[data-view="forgot"] .panel-view-auth {
  display: none !important;
}
.panel[data-view="forgot"] .panel-view-forgot {
  display: block !important;
}

.panel-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.logo-icon {
  display: inline-block;
  color: var(--accent);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  opacity: 0.9;
}

.title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  margin: 0 0 0.25rem 0;
  color: var(--text);
}

.subtitle {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  margin: 0;
}

/* 选项卡 */
.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.tab {
  flex: 1;
  padding: 0.6rem 1rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

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

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 表单 */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.field label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.optional {
  font-weight: normal;
  color: var(--text-muted);
  opacity: 0.8;
}

.field input {
  width: 100%;
  padding: 0.65rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-dim);
}

.field-hint {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.field-hint.countdown {
  color: var(--accent);
}

.input-row {
  display: flex;
  gap: 0.75rem;
}

.input-row input {
  flex: 1;
  min-width: 0;
}

.input-row .password-toggle {
  padding: 0;
  border: none;
  width: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.input-row .password-toggle:hover:not(:disabled) {
  background: transparent;
}

.btn-outline {
  flex-shrink: 0;
  padding: 0.65rem 1rem;
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-outline:hover:not(:disabled) {
  background: var(--accent-dim);
  color: var(--text);
}

.btn-outline:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  margin-top: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  border: none;
  border-radius: 4px;
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: opacity 0.2s, box-shadow 0.2s;
}

.btn-primary:hover:not(:disabled) {
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.35);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-error,
.form-success {
  font-size: 0.8rem;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
}

.form-error {
  background: rgba(200, 80, 80, 0.15);
  border: 1px solid rgba(200, 80, 80, 0.4);
  color: #f0a0a0;
}

.form-success {
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 170, 0.3);
  color: var(--accent);
}

.forgot-link-wrap {
  margin-top: -0.5rem;
  margin-bottom: 0.25rem;
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s;
}

.link-btn:hover {
  opacity: 0.85;
  text-decoration: underline;
}

.panel-view-forgot .back-link {
  display: block;
  margin-top: 1rem;
  text-align: center;
  width: 100%;
}

/* Zion 水印 */
.watermark {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 10;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.watermark:hover {
  opacity: 1;
}

.watermark img {
  display: block;
  height: 32px;
  width: auto;
}

@media (max-width: 480px) {
  .panel {
    padding: 1.5rem;
  }

  .input-row {
    flex-direction: column;
  }

  .btn-outline {
    width: 100%;
  }
}