/* Login page styles */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.login-container {
    display: flex;
    width: 100%;
    height: 100vh;
    position: relative;
}

.login-card {
    background: white;
    width: 100%;
    max-width: 400px;
    margin: auto;
    border-radius: 1rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    z-index: 10;
    position: relative;
    animation: slideIn 0.6s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    padding: 2rem;
    text-align: center;
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-header p {
    opacity: 0.9;
    font-size: 0.875rem;
}

.login-form {
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
    font-size: 0.875rem;
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f9fafb;
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus {
    outline: none;
    border-color: #4f46e5;
    background: white;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.checkbox-group {
    display: flex;
    align-items: center;
}

/* 簡潔複選框樣式 */
.simple-checkbox {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.875rem;
    color: #6b7280;
    gap: 0.5rem;
    user-select: none;
}

.simple-checkbox input[type="checkbox"] {
    display: none;
}

.checkmark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    background: transparent;
    color: transparent;
    font-size: 12px;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.simple-checkbox input[type="checkbox"]:checked + .checkmark {
    background: #4f46e5;
    border-color: #4f46e5;
    color: white;
}

.simple-checkbox:hover .checkmark {
    border-color: #4f46e5;
}

/* 表單動作區域 - 水平排列 */
.form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
    min-height: 50px; /* 確保容器有固定高度 */
}

.form-actions .login-btn {
    flex: 1;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    border: none;
    padding: 0.875rem 1rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0;
}

.form-actions .checkbox-group {
    flex-shrink: 0;
    margin: 0; /* 移除所有邊距 */
    height: auto; /* 自動調整高度 */
    display: flex;
    align-items: center; /* 垂直居中對齊 */
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(79, 70, 229, 0.3);
}

.login-btn:active {
    transform: translateY(0);
}

.login-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid #e5e7eb;
    text-align: center;
}

.back-link {
    color: #6b7280;
    text-decoration: none;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: #4f46e5;
}

/* 警告訊息 */
.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    animation: fadeIn 0.3s ease-out;
}

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

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fed7aa;
}

/* 背景裝飾 */
.login-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 1;
}

.bg-pattern {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>') repeat;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}

/* 密碼輸入容器樣式 */
.password-input-container {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-container input {
    padding-right: 3rem;
}

.password-toggle {
    position: absolute;
    right: 0.75rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: #6b7280;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.password-toggle:hover {
    color: #4f46e5;
}

/* 圖標樣式 */
.icon-login::before { content: '🔐'; }
.icon-arrow-left::before { content: '←'; }
.icon-warning::before { content: '⚠️'; }
.icon-check::before { content: '✅'; }
.icon-eye::before { content: '👁️'; }
.icon-eye-slash::before { content: '🙈'; }

/* 響應式設計 */
@media (max-width: 768px) {
    .login-container {
        padding: 1rem;
    }
    
    .login-card {
        max-width: 100%;
        margin: 0;
    }
    
    .login-header {
        padding: 1.5rem;
    }
    
    .login-header h1 {
        font-size: 1.5rem;
    }
    
    .login-form {
        padding: 1.5rem;
    }
    
    .login-footer {
        padding: 1rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .login-header {
        padding: 1rem;
    }
    
    .login-header h1 {
        font-size: 1.25rem;
    }
    
    .login-form {
        padding: 1rem;
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
    
    .login-footer {
        padding: 1rem;
    }
}

/* 載入狀態 */
.login-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.login-btn.loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 0.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 深色模式支援 */
@media (prefers-color-scheme: dark) {
    .login-card {
        background: #1f2937;
        color: #f9fafb;
    }
    
    .form-group label {
        color: #d1d5db;
    }
    
    .form-group input[type="text"],
    .form-group input[type="password"] {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }
    
    .form-group input[type="text"]:focus,
    .form-group input[type="password"]:focus {
        background: #4b5563;
        border-color: #6366f1;
    }
    
    .toggle-switch {
        color: #9ca3af;
    }
    
    .toggle-slider {
        background: #4b5563;
    }
    
    .toggle-switch input[type="checkbox"]:checked + .toggle-slider {
        background: #6366f1;
    }
    
    .login-footer {
        border-top-color: #374151;
    }
    
    .back-link {
        color: #9ca3af;
    }
    
    .back-link:hover {
        color: #a5b4fc;
    }
}