/* =================================================================
   Delta CFO Agent - Authentication Pages Styling
   ================================================================= */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Auth Container */
.auth-container {
    width: 100%;
    max-width: 480px;
    animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Auth Card */
.auth-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

/* Auth Header */
.auth-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.auth-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.auth-header p {
    font-size: 14px;
    opacity: 0.95;
    font-weight: 300;
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    border-bottom: 1px solid #e5e7eb;
}

.auth-tabs .tab {
    flex: 1;
    padding: 16px;
    text-align: center;
    text-decoration: none;
    color: #6b7280;
    font-weight: 500;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.auth-tabs .tab:hover {
    background: #f9fafb;
    color: #667eea;
}

.auth-tabs .tab.active {
    color: #667eea;
    border-bottom-color: #667eea;
    background: #f9fafb;
}

/* Auth Form */
.auth-form {
    padding: 30px;
}

/* Form Group */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #374151;
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s;
    font-family: inherit;
}

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

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    color: #6b7280;
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: #374151;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.forgot-link {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

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

/* Radio Group */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.radio-label:hover {
    border-color: #667eea;
    background: #f9fafb;
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-custom {
    width: 20px;
    height: 20px;
    border: 2px solid #d1d5db;
    border-radius: 50%;
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
    transition: all 0.3s;
}

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

.radio-label input[type="radio"]:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    background: #667eea;
    border-radius: 50%;
}

.radio-content {
    flex: 1;
}

.radio-content strong {
    display: block;
    color: #111827;
    margin-bottom: 4px;
}

.radio-content small {
    color: #6b7280;
    font-size: 13px;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-google {
    width: 100%;
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #f3f4f6;
    color: #374151;
    border: 2px solid #e5e7eb;
}

.btn-secondary:hover {
    background: #e5e7eb;
}

.btn-google {
    background: white;
    color: #374151;
    border: 2px solid #e5e7eb;
}

.btn-google:hover {
    background: #f9fafb;
    border-color: #d1d5db;
}

.btn-google svg {
    flex-shrink: 0;
}

/* Button Loader */
.btn-loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 24px 0;
    color: #9ca3af;
    font-size: 13px;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid #e5e7eb;
}

.divider span {
    padding: 0 12px;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-top: 16px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

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

/* Auth Footer */
.auth-footer {
    padding: 20px 30px;
    background: #f9fafb;
    text-align: center;
    border-top: 1px solid #e5e7eb;
}

.auth-footer p {
    color: #6b7280;
    font-size: 14px;
}

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

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

/* Invitation Details */
.invitation-details {
    padding: 20px 30px 30px;
}

.invitation-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 30px;
}

.invitation-icon {
    margin-bottom: 16px;
}

.invitation-icon svg {
    color: white;
}

.invitation-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.invitation-text {
    font-size: 15px;
    margin-bottom: 16px;
    opacity: 0.95;
}

.invitation-meta {
    font-size: 13px;
    opacity: 0.85;
}

/* Loading State */
.loading-state {
    padding: 60px 30px;
    text-align: center;
}

.loader {
    width: 48px;
    height: 48px;
    border: 4px solid #e5e7eb;
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 20px;
}

.loading-state p {
    color: #6b7280;
    font-size: 15px;
}

/* Error State */
.error-state {
    padding: 60px 30px;
    text-align: center;
}

.error-icon {
    margin-bottom: 20px;
}

.error-icon svg {
    color: #ef4444;
}

.error-state h3 {
    font-size: 20px;
    color: #111827;
    margin-bottom: 8px;
}

.error-state p {
    color: #6b7280;
    margin-bottom: 24px;
}

/* Responsive */
@media (max-width: 480px) {
    .auth-container {
        padding: 10px;
    }

    .auth-header {
        padding: 30px 20px;
    }

    .auth-header h1 {
        font-size: 24px;
    }

    .auth-form {
        padding: 20px;
    }

    .invitation-details {
        padding: 15px 20px 20px;
    }

    .invitation-card {
        padding: 20px;
    }
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.form-group {
    animation: slideIn 0.3s ease-out forwards;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }
.form-group:nth-child(5) { animation-delay: 0.5s; }