/* =================================
   AUTHENTICATION STYLES
   ================================= */

/* Auth Body */
.auth-body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Auth Container */
.auth-container {
    width: 100%;
    max-width: 480px;
    padding: 2rem;
    box-sizing: border-box;
}

/* Auth Header */
.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 0.5rem;
}

.auth-logo {
    font-size: 2.5rem;
    font-weight: 900;
    color: white;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    letter-spacing: -0.02em;
}

.auth-logo-img {
    height: 50px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.auth-subtitle {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.9);
    margin: 0;
    font-weight: 400;
}

/* Auth Card */
.auth-card {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    border: 1px solid rgba(255,255,255,0.2);
}

.auth-card-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-card-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0 0 0.5rem 0;
}

.auth-card-header p {
    font-size: 1rem;
    color: #666;
    margin: 0;
}

/* Auth Form */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: #374151;
    margin-bottom: 0.5rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    padding: 0.875rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
    background: white;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input:invalid:not(:focus):not(:placeholder-shown) {
    border-color: #ef4444;
}

.form-help {
    font-size: 0.8rem;
    color: #6b7280;
    margin-top: 0.25rem;
}

/* Checkbox Groups */
.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
    gap: 0;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9rem;
    color: #374151;
    cursor: pointer;
    user-select: none;
    line-height: 1.4;
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
    margin-top: 1px;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: #667eea;
    border-color: #667eea;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.checkbox-label a {
    color: #667eea;
    text-decoration: none;
}

.checkbox-label a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

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

.btn-full {
    width: 100%;
}

.btn-loading .btn-text {
    opacity: 0;
}

.btn-loading .btn-loading {
    display: flex !important;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    align-items: center;
    justify-content: center;
}

/* Spinner */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

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

/* Messages */
.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-top: 1rem;
}

.success-message {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #16a34a;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Auth Divider */
.auth-divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e5e7eb;
}

.auth-divider span {
    background: white;
    color: #6b7280;
    padding: 0 1rem;
    font-size: 0.9rem;
    position: relative;
}

/* Auth Actions */
.auth-actions {
    text-align: center;
    margin: 1rem 0;
}

.auth-link {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.auth-link:hover {
    text-decoration: underline;
}

/* Auth Footer */
.auth-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #f3f4f6;
}

.auth-footer p {
    margin: 0;
    color: #6b7280;
    font-size: 0.9rem;
}

.auth-footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Auth Features */
.auth-features {
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.auth-features h3 {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0 0 1rem 0;
}

.auth-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.auth-features li {
    color: rgba(255,255,255,0.9);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.auth-features li:last-child {
    margin-bottom: 0;
}

/* Responsive Design */
@media (max-width: 640px) {
    .auth-container {
        padding: 1rem;
    }
    
    .auth-card {
        padding: 1.5rem;
    }
    
    .auth-logo {
        font-size: 2rem;
    }
    
    .auth-card-header h2 {
        font-size: 1.5rem;
    }
}

/* Form Validation States */
.form-group input:valid:not(:placeholder-shown) {
    border-color: #10b981;
}

.form-group input:invalid:not(:focus):not(:placeholder-shown) + .form-help {
    color: #ef4444;
}

/* Loading State */
.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

/* Focus States for Accessibility */
.btn:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

.checkbox-label:focus-within .checkmark {
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Smooth Transitions */
* {
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}