/* ==========================================================================
   ChingTech OS - Login Page Styles
   ========================================================================== */

/* 主題切換按鈕 */
.theme-toggle-btn {
  position: fixed;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  transform: scale(1.05);
}

.theme-toggle-btn .icon {
  font-size: 20px;
}

.theme-toggle-btn .icon svg {
  width: 20px;
  height: 20px;
}

/* 亮色主題：按鈕樣式 */
:root[data-theme="light"] .theme-toggle-btn {
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] .theme-toggle-btn:hover {
  background: rgba(0, 0, 0, 0.1);
}

.login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--spacing-lg);
  position: relative;
  background: transparent;
}

/* 背景漸層過渡效果 - 使用偽元素實現，z-index: -1 讓 canvas 在上面 */
.login-container::before,
.login-container::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: -1;
}

/* 暗色主題背景（底層） */
.login-container::before {
  background: linear-gradient(135deg, #1a1a1a 0%, #101010 100%);
}

/* 亮色主題背景（上層，透過 opacity 控制） */
.login-container::after {
  background: linear-gradient(135deg, #e0e0e0 0%, #f5f5f5 100%);
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}

/* 亮色主題：顯示亮色背景（蓋住暗色背景） */
:root[data-theme="light"] .login-container::after {
  opacity: 1;
}

/* Logo Section */
.login-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  text-align: center;
  position: relative;
  z-index: 1;
}

.login-logo-icon {
  width: 80px;
  height: 80px;
  margin-bottom: var(--spacing-sm);
  animation: logoGlowDark 4s ease-in-out infinite;
}

/* 暗色主題：青色發光呼吸動畫（固定大小，變化透明度） */
@keyframes logoGlowDark {
  0%, 100% {
    filter: drop-shadow(0 0 8px rgba(33, 212, 253, 0.3)) drop-shadow(0 0 16px rgba(33, 212, 253, 0.15));
  }
  50% {
    filter: drop-shadow(0 0 8px rgba(33, 212, 253, 0.8)) drop-shadow(0 0 16px rgba(33, 212, 253, 0.5));
  }
}

/* 亮色主題：青色發光呼吸動畫（固定大小，變化透明度） */
:root[data-theme="light"] .login-logo-icon {
  animation: logoGlowLight 4s ease-in-out infinite;
}

@keyframes logoGlowLight {
  0%, 100% {
    filter: drop-shadow(0 0 6px rgba(8, 145, 178, 0.2)) drop-shadow(0 0 12px rgba(8, 145, 178, 0.1));
  }
  50% {
    filter: drop-shadow(0 0 6px rgba(8, 145, 178, 0.6)) drop-shadow(0 0 12px rgba(8, 145, 178, 0.35));
  }
}

.login-logo-text {
  font-family: var(--font-technical);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.15em;
  line-height: 1.2;
  margin: 0;
  text-shadow: 0 0 20px rgba(33, 212, 253, 0.5), 0 0 40px rgba(33, 212, 253, 0.3);
  user-select: none;
  -webkit-user-select: none;
  cursor: default;
}

/* 亮色主題：ChingTech 用投影代替發光 */
:root[data-theme="light"] .login-logo-text {
  text-shadow: 0 2px 8px rgba(8, 145, 178, 0.3);
}

.login-logo-text span {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.4em;
  color: var(--text-primary);
  text-shadow: 0 0 15px rgba(255, 255, 255, 0.5), 0 0 30px rgba(255, 255, 255, 0.3);
}

/* 亮色主題：OS 加陰影 */
:root[data-theme="light"] .login-logo-text span {
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

/* Login Card */
.login-card {
  width: 100%;
  max-width: 400px;
  background-color: rgba(26, 26, 26, 0.85);
  border: 1px solid var(--interactive-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(6px);
  position: relative;
  z-index: 1;
}

/* 亮色主題：login-card 玻璃效果 */
:root[data-theme="light"] .login-card {
  background-color: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.15);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(6px);
}

/* Form Styles */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.form-group .input {
  height: 44px;
}

/* 覆蓋瀏覽器自動填入樣式（使用 CSS 變數，自動適應主題） */
.form-group .input:-webkit-autofill,
.form-group .input:-webkit-autofill:hover,
.form-group .input:-webkit-autofill:focus,
.form-group .input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px var(--color-background) inset !important;
  -webkit-text-fill-color: var(--text-primary) !important;
  caret-color: var(--text-primary);
  transition: background-color 5000s ease-in-out 0s;
}

.form-group .input-icon {
  position: relative;
}

.form-group .input-icon .input {
  padding-left: 44px;
}

.form-group .input-icon .icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.form-group .input-icon .icon svg {
  width: 20px;
  height: 20px;
}

.form-group .input-icon .input:focus + .icon,
.form-group .input-icon .input:not(:placeholder-shown) + .icon {
  color: var(--color-primary);
}

/* ── 密碼顯示切換按鈕 ── */
.password-toggle {
  position: absolute;
  right: var(--spacing-sm);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm, 4px);
  transition: color 0.2s, background-color 0.2s;
}
.password-toggle:hover {
  color: var(--text-primary);
  background-color: var(--bg-hover, rgba(255,255,255,0.06));
}
.password-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.password-toggle .icon svg {
  width: 18px;
  height: 18px;
}
.input-icon--has-toggle .input {
  padding-right: 44px;
}

/* ── 即時驗證提示 ── */
.form-hint {
  display: block;
  min-height: 1.2em;
  font-size: var(--font-size-xs, 12px);
  color: var(--color-error);
  margin-top: 4px;
}
.form-validation-hints {
  min-height: 1.2em;
  font-size: var(--font-size-xs, 12px);
  color: var(--color-error);
  text-align: center;
  margin-bottom: var(--spacing-xs, 4px);
}
.input--invalid {
  border-color: var(--color-error) !important;
  box-shadow: 0 0 0 1px var(--color-error);
}

/* ── Submit loading 旋轉動畫 ── */
.login-btn .ui-state-icon svg,
.login-btn .spin {
  animation: login-spin 1s linear infinite;
  width: 18px;
  height: 18px;
}
@keyframes login-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.login-btn[aria-busy="true"] {
  opacity: 0.75;
  cursor: wait;
}

/* Login Button */
.login-btn {
  width: 100%;
  height: 48px;
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
}

/* Error Message */
.login-error {
  display: none;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: rgba(230, 80, 80, 0.1);
  border: 1px solid rgba(230, 80, 80, 0.3);
  border-radius: var(--radius-md);
  color: var(--color-error);
  font-size: var(--font-size-sm);
  text-align: center;
}

.login-error.show {
  display: block;
}

/* Footer */
.login-footer {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--interactive-border);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--font-size-xs);
  position: relative;
  z-index: 1;
}

/* Decorative Elements - 暫時停用
.login-container::before {
  content: '';
  position: fixed;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(33, 212, 253, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.login-container::after {
  content: '';
  position: fixed;
  bottom: -50%;
  left: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(128, 128, 128, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

:root[data-theme="light"] .login-container::before {
  background: radial-gradient(circle, rgba(255, 160, 80, 0.08) 0%, transparent 70%);
}
*/

/* ==========================================================================
   Change Password Dialog
   ========================================================================== */

.change-password-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-overlay-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: var(--spacing-lg);
}

.change-password-dialog {
  width: 100%;
  max-width: 400px;
  background-color: rgba(26, 26, 26, 0.95);
  border: 1px solid var(--interactive-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(6px);
}

:root[data-theme="light"] .change-password-dialog {
  background-color: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(0, 0, 0, 0.15);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.change-password-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.change-password-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-xs) 0;
}

.change-password-header p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin: 0;
}

.change-password-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* 變更密碼表單的輸入框樣式 */
.change-password-form .form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.change-password-form .form-group label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.change-password-form .form-group .input {
  width: 100%;
  height: 44px;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-surface);
  border: 1px solid var(--color-gray-dark);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  line-height: 1.5;
  transition: all var(--transition-fast);
}

.change-password-form .form-group .input:focus {
  border-color: var(--color-accent);
  background-color: var(--bg-surface-darker);
}

.change-password-form .form-group .input::placeholder {
  color: var(--text-muted);
}

/* 覆蓋瀏覽器自動填入樣式（使用 CSS 變數，自動適應主題） */
.change-password-form .form-group .input:-webkit-autofill,
.change-password-form .form-group .input:-webkit-autofill:hover,
.change-password-form .form-group .input:-webkit-autofill:focus,
.change-password-form .form-group .input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px var(--color-background) inset !important;
  -webkit-text-fill-color: var(--text-primary) !important;
  caret-color: var(--text-primary);
  transition: background-color 5000s ease-in-out 0s;
}

.change-password-error {
  display: none;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: rgba(230, 80, 80, 0.1);
  border: 1px solid rgba(230, 80, 80, 0.3);
  border-radius: var(--radius-md);
  color: var(--color-error);
  font-size: var(--font-size-sm);
  text-align: center;
}

.change-password-error.show {
  display: block;
}

.change-password-actions {
  margin-top: var(--spacing-sm);
}

.change-password-actions .btn {
  width: 100%;
  height: 48px;
  font-size: var(--font-size-base);
  font-weight: 600;
}

/* ==========================================================================
   減少動態效果（無障礙）
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  /* 主題切換按鈕 */
  .theme-toggle-btn {
    transition: none;
  }

  /* 背景漸層過渡 */
  .login-container::after {
    transition: none;
  }

  /* Logo 發光呼吸動畫 */
  .login-logo-icon,
  :root[data-theme="light"] .login-logo-icon {
    animation: none;
  }

  /* 密碼顯示切換按鈕 */
  .password-toggle {
    transition: none;
  }

  /* Submit loading 旋轉動畫 */
  .login-btn .ui-state-icon svg,
  .login-btn .spin {
    animation: none;
  }

  /* 變更密碼輸入框 */
  .change-password-form .form-group .input {
    transition: none;
  }
}