/* ================================================================
   枢爻验证码 · 用户控制台统一样式
   Shuyao CAPTCHA Console – Unified Stylesheet
   ================================================================ */

/* === CSS 变量 === */
:root {
  /* 主色 */
  --primary: #4ECDC4;
  --primary-light: #44b5ad;
  --primary-dark: #3da49d;
  --primary-glow: rgba(78, 205, 196, 0.25);
  --primary-bg: rgba(78, 205, 196, 0.08);
  --primary-border: rgba(78, 205, 196, 0.25);

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #4ECDC4, #44b5ad);
  --gradient-bg: #f7faff;

  /* 背景 */
  --bg-body: #f7faff;
  --bg-card: #ffffff;
  --bg-input: #f5f7fa;
  --bg-input-focus: rgba(78, 205, 196, 0.06);

  /* 边框 */
  --border-subtle: #e2e8f0;
  --border-input: #ddd;
  --border-input-focus: #4ECDC4;

  /* 文字 */
  --text-primary: #2C3E50;
  --text-secondary: #6c757d;
  --text-muted: #999;
  --text-placeholder: #bbb;

  /* 状态色 */
  --success: #4ECDC4;
  --error: #e74c3c;
  --warning: #f39c12;
  --info: #3498db;

  /* 阴影 */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-btn: 0 4px 16px rgba(78, 205, 196, 0.3);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

/* === 全局重置 === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-bg);
  font-family: var(--font-family);
  color: var(--text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

/* === 背景粒子 === */
.bg-particles {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
}
.bg-particles span {
  position: absolute;
  width: 4px; height: 4px;
  background: rgba(78, 205, 196, 0.15);
  border-radius: 50%;
  animation: float-up linear infinite;
}
@keyframes float-up {
  0%   { transform: translateY(100vh) scale(0); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

/* === 卡片 === */
.card {
  position: relative;
  z-index: 1;
  width: 440px;
  max-width: 92vw;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 48px 40px 40px;
  box-shadow: var(--shadow-card);
  animation: card-in 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(30px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* === Logo 区 === */
.logo-area {
  text-align: center;
  margin-bottom: 36px;
}
.logo-area img {
  width: 68px; height: 68px;
  border-radius: 16px;
  margin-bottom: 16px;
  filter: drop-shadow(0 4px 12px rgba(78, 205, 196, 0.3));
}
.logo-area h1 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 1px;
}
.logo-area p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* === 表单组 === */
.form-group {
  margin-bottom: 20px;
  position: relative;
}
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}
.input-wrap {
  position: relative;
}

/* === 输入框 === */
.input-field {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 15px;
  font-family: var(--font-family);
  outline: none;
  transition: all 0.25s;
}
.input-field::placeholder { color: var(--text-placeholder); }
.input-field:focus {
  border-color: var(--border-input-focus);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.12);
}

/* === 密码切换 === */
.pwd-toggle {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  cursor: pointer; color: #bbb; user-select: none;
  display: flex; align-items: center; z-index: 1;
  transition: color 0.2s;
  background: none; border: none;
}
.pwd-toggle:hover { color: #666; }

/* === 按钮基础 === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}
.btn:active { transform: translateY(0); }

.btn-primary {
  width: 100%;
  background: var(--gradient-primary);
  color: #fff;
  margin-top: 8px;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn);
}
.btn-primary.loading { pointer-events: none; opacity: 0.8; }
.btn-primary.loading .btn-text { display: none; }
.btn-primary.loading .spinner { display: inline-block; }

.btn-outline {
  width: 100%;
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary-border);
  margin-top: 8px;
}
.btn-outline:hover {
  background: var(--primary-bg);
  border-color: var(--primary);
}

/* === Spinner === */
.spinner {
  display: none;
  width: 18px; height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* === 错误提示 === */
.error-msg {
  background: rgba(231, 76, 60, 0.12);
  border: 1px solid rgba(231, 76, 60, 0.25);
  color: var(--error);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
  display: none;
  animation: shake 0.4s;
}
.error-msg.show { display: block; }

/* === 成功提示 === */
.success-msg {
  background: rgba(78, 205, 196, 0.12);
  border: 1px solid rgba(78, 205, 196, 0.25);
  color: var(--success);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
  display: none;
  animation: card-in 0.3s ease;
}
.success-msg.show { display: block; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

/* === 复选框 === */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}
.checkbox-group input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}
.checkbox-group a {
  color: var(--primary-light);
  transition: color 0.2s;
}
.checkbox-group a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* === 底部链接 === */
.card-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
}
.card-footer a {
  color: var(--primary-light);
  font-weight: 500;
  transition: color 0.2s;
}
.card-footer a:hover { color: var(--primary-dark); }
.card-footer .divider {
  margin: 0 12px;
  color: #ddd;
}

/* === 版权 === */
.footer-copy {
  text-align: center;
  margin-top: 32px;
  font-size: 12px;
  color: var(--text-muted);
}

/* === 密码强度指示器 === */
.strength-bar {
  display: flex;
  gap: 4px;
  margin-top: 8px;
}
.strength-bar .bar {
  flex: 1;
  height: 3px;
  background: #e2e8f0;
  border-radius: 2px;
  transition: background 0.3s;
}
.strength-bar.weak .bar:nth-child(1) { background: var(--error); }
.strength-bar.medium .bar:nth-child(1),
.strength-bar.medium .bar:nth-child(2) { background: var(--warning); }
.strength-bar.strong .bar:nth-child(1),
.strength-bar.strong .bar:nth-child(2),
.strength-bar.strong .bar:nth-child(3) { background: var(--success); }
.strength-text {
  font-size: 12px;
  margin-top: 4px;
  color: var(--text-muted);
  transition: color 0.3s;
}

/* === 步骤指示器 === */
.steps {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 28px;
}
.step-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.3s;
}
.step-item .step-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  background: #f0f4f8;
  border: 1px solid #e2e8f0;
  transition: all 0.3s;
}
.step-item.active { color: var(--text-primary); }
.step-item.active .step-num {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
}
.step-item.done .step-num {
  background: var(--success);
  border-color: transparent;
  color: #fff;
}

/* === 邮箱验证码 6 格输入框 === */
#emailVerifySection {
  animation: card-in 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.code-inputs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 20px 0;
}
.code-box {
  width: 48px;
  height: 56px;
  text-align: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 2px solid var(--border-input);
  border-radius: var(--radius-md);
  outline: none;
  caret-color: var(--primary);
  transition: all 0.2s;
}
.code-box:focus {
  border-color: var(--primary);
  background: var(--bg-input-focus);
  box-shadow: 0 0 12px rgba(78, 205, 196, 0.15);
}
.code-box.error {
  border-color: var(--error);
  animation: shake 0.4s ease;
}
.code-box.success {
  border-color: var(--primary);
  background: rgba(78, 205, 196, 0.15);
}

/* === 响应式 === */
@media (max-width: 480px) {
  .card {
    padding: 36px 24px 32px;
    border-radius: var(--radius-lg);
  }
  .logo-area img {
    width: 56px; height: 56px;
  }
  .logo-area h1 { font-size: 20px; }
  .btn { padding: 12px 20px; font-size: 15px; }
  .steps { gap: 16px; }
  .step-item { font-size: 12px; }
  .code-box {
    width: 40px;
    height: 48px;
    font-size: 20px;
  }
  .code-inputs { gap: 6px; }
}