/**
 * Waline Custom Authentication Styles
 * ====================================
 *
 * 独立的评论系统认证样式文件
 * 用于登录页面和注册页面
 *
 * @version 1.0.0
 * @created 2025-10-21
 * @reusable Yes - 可用于任何使用 Waline 的 Hugo 站点
 *
 * 复用说明:
 * 1. 将此文件复制到新站点的 static/css/ 目录
 * 2. 在 login.html 和 register.html 中引入: <link rel="stylesheet" href="{{ "css/waline-custom-auth.css" | absURL }}">
 * 3. 通过 CSS 变量自定义品牌色（见下方 :root 配置）
 * 4. 如需调整布局，修改 --waline-auth-* 变量即可
 */

/* ========================================
   Layout Overrides for Login/Register Pages
   ======================================== */

/* Override body and main container for login page */
body:has(.waline-custom-login-container) {
  padding-top: 0 !important;
}

main:has(.waline-custom-login-container) {
  max-width: 100% !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
  margin-top: 0 !important;
}

/* ========================================
   CSS Variables for Brand Inheritance
   ======================================== */

:root {
  /* 品牌主题色 - 可通过 Hugo 配置覆盖 */
  --waline-theme-color: #0ea5e9; /* Sky blue - 可修改为站点品牌色 */

  /* 基础颜色 */
  --waline-border-color: #e5e7eb;
  --waline-bg-color: #ffffff;
  --waline-text-color: #1f2937;
  --waline-text-light: #6b7280;
  --waline-error-color: #ef4444;
  --waline-success-color: #10b981;
  --waline-hover-bg: #f9fafb;

  /* 阴影效果 */
  --waline-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --waline-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* 圆角 */
  --waline-border-radius: 0.5rem;
  --waline-border-radius-sm: 0.375rem;
}

/* ========================================
   Login Container
   ======================================== */

.waline-custom-login-container {
  min-height: calc(100vh - 200px);
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 2rem 1rem !important;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%) !important;
  width: 100% !important;
  margin: 0 !important;
}

/* ========================================
   Login Card
   ======================================== */

.waline-custom-login-card {
  width: 100%;
  max-width: 28rem;
  background: var(--waline-bg-color);
  border-radius: var(--waline-border-radius);
  box-shadow: var(--waline-shadow-lg);
  padding: 2.5rem;
  animation: waline-fade-in 0.3s ease-out;
}

@keyframes waline-fade-in {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   Login Header
   ======================================== */

.waline-login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.waline-login-logo {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  display: block;
  object-fit: contain;
}

.waline-login-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--waline-text-color);
  margin: 0 0 0.5rem 0;
  line-height: 1.2;
}

.waline-login-subtitle {
  font-size: 0.875rem;
  color: var(--waline-text-light);
  margin: 0;
}

/* ========================================
   Form Styles
   ======================================== */

.waline-login-form {
  margin-top: 1.5rem;
}

.waline-form-group {
  margin-bottom: 0.75rem;
}

.waline-form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--waline-text-color);
  margin-bottom: 0.5rem;
}

.waline-form-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--waline-text-color);
  background-color: var(--waline-bg-color);
  border: 1px solid var(--waline-border-color);
  border-radius: var(--waline-border-radius-sm);
  transition: all 0.2s ease;
  box-sizing: border-box;
}

.waline-form-input:focus {
  outline: none;
  border-color: var(--waline-theme-color);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.waline-form-input::placeholder {
  color: #9ca3af;
}

/* ========================================
   Password Input Wrapper
   ======================================== */

.waline-password-wrapper {
  position: relative;
}

.waline-password-toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--waline-text-light);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
}

.waline-password-toggle:hover {
  color: var(--waline-theme-color);
}

.waline-password-toggle svg {
  stroke-width: 2;
}

/* ========================================
   Error Messages
   ======================================== */

.waline-error-message {
  display: block;
  font-size: 0.8125rem;
  color: var(--waline-error-color);
  margin-top: 0.375rem;
  min-height: 1.125rem;
}

/* ========================================
   Form Options (Remember Me & Forgot Password)
   ======================================== */

.waline-form-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.waline-checkbox-label {
  display: flex;
  align-items: center;
  color: var(--waline-text-color);
  cursor: pointer;
  user-select: none;
}

.waline-checkbox {
  width: 1rem;
  height: 1rem;
  margin-right: 0.5rem;
  cursor: pointer;
  accent-color: var(--waline-theme-color);
}

.waline-forgot-link {
  color: var(--waline-theme-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

.waline-forgot-link:hover {
  color: #0284c7;
  text-decoration: underline;
}

/* ========================================
   Alert Messages
   ======================================== */

.waline-alert {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 1rem;
  border-radius: var(--waline-border-radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  animation: waline-slide-down 0.3s ease-out;
}

@keyframes waline-slide-down {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.waline-alert svg {
  flex-shrink: 0;
  stroke-width: 2;
}

.waline-alert-error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.waline-alert-success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

/* ========================================
   Submit Button
   ======================================== */

.waline-submit-button {
  width: 100%;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--waline-theme-color);
  border: none;
  border-radius: var(--waline-border-radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.waline-submit-button:hover:not(:disabled) {
  background-color: #0284c7;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
}

.waline-submit-button:active:not(:disabled) {
  transform: translateY(0);
}

.waline-submit-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ========================================
   Loading Spinner
   ======================================== */

.waline-spinner {
  animation: waline-spin 1s linear infinite;
}

@keyframes waline-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   Register Prompt
   ======================================== */

.waline-register-prompt {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--waline-text-light);
}

.waline-register-prompt a {
  color: var(--waline-theme-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.waline-register-prompt a:hover {
  color: #0284c7;
  text-decoration: underline;
}

/* ========================================
   OAuth Section
   ======================================== */

.waline-oauth-section {
  margin-bottom: 1.5rem;
}

.waline-oauth-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.waline-oauth-button {
  width: 100%;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--waline-text-color);
  background-color: var(--waline-bg-color);
  border: 1px solid var(--waline-border-color);
  border-radius: var(--waline-border-radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  text-decoration: none;
}

.waline-oauth-button:hover {
  background-color: var(--waline-hover-bg);
  border-color: var(--waline-theme-color);
  box-shadow: var(--waline-shadow);
  transform: translateY(-1px);
}

.waline-oauth-button:active {
  transform: translateY(0);
}

.waline-oauth-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* OAuth Button Specific Colors */
.waline-oauth-button.twitter {
  color: #1da1f2;
  border-color: #1da1f2;
}

.waline-oauth-button.twitter:hover {
  background-color: #e8f5fe;
}

.waline-oauth-button.google {
  color: #4285f4;
  border-color: #4285f4;
}

.waline-oauth-button.google:hover {
  background-color: #e8f0fe;
}

.waline-oauth-button.github {
  color: #24292e;
  border-color: #24292e;
}

.waline-oauth-button.github:hover {
  background-color: #f6f8fa;
}

/* ========================================
   Divider
   ======================================== */

.waline-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 1.5rem 0;
}

.waline-divider::before,
.waline-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--waline-border-color);
}

.waline-divider span {
  padding: 0 1rem;
  font-size: 0.875rem;
  color: var(--waline-text-light);
}

/* ========================================
   Footer Links
   ======================================== */

.waline-login-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--waline-border-color);
  text-align: center;
}

.waline-login-footer p {
  font-size: 0.75rem;
  color: var(--waline-text-light);
  margin: 0 0 1rem 0;
  line-height: 1.5;
}

.waline-login-footer a {
  color: var(--waline-theme-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

.waline-login-footer a:hover {
  color: #0284c7;
  text-decoration: underline;
}

.waline-back-link {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-top: 0.5rem;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 640px) {
  .waline-custom-login-container {
    padding: 1rem;
  }

  .waline-custom-login-card {
    padding: 1.5rem;
  }

  .waline-login-title {
    font-size: 1.5rem;
  }

  .waline-login-logo {
    width: 48px;
    height: 48px;
  }
}

/* ========================================
   Accessibility: Focus Visible for Keyboard Navigation
   ======================================== */

.waline-oauth-button:focus-visible,
.waline-submit-button:focus-visible,
.waline-form-input:focus-visible,
.waline-checkbox:focus-visible {
  outline: 2px solid var(--waline-theme-color);
  outline-offset: 2px;
}

/* ========================================
   Dark Mode Support (Optional)
   ======================================== */

@media (prefers-color-scheme: dark) {
  :root {
    --waline-bg-color: #1f2937;
    --waline-text-color: #f9fafb;
    --waline-text-light: #9ca3af;
    --waline-border-color: #374151;
    --waline-hover-bg: #374151;
  }

  .waline-custom-login-container {
    background: linear-gradient(135deg, #111827 0%, #1f2937 100%) !important;
  }

  .waline-form-input {
    background-color: #374151;
    color: #f9fafb;
  }

  .waline-oauth-button {
    background-color: #374151;
    color: #f9fafb;
  }
}