/**
 * Unified Auth Popup Styles
 * 
 * ChatGPT-style authentication popup with clean, minimal interface.
 * Includes modal centering, backdrop, transitions, social button styling,
 * and responsive design for mobile.
 * 
 * Requirements: 1.3, 10.1, 10.3, 10.4, 10.6
 */

/* ============================================
   Body Lock (when popup is open)
   ============================================ */
.auth-popup-body-lock {
    overflow: hidden;
}

/* ============================================
   Popup Container
   ============================================ */
.auth-popup {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.auth-popup.auth-popup-open {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   Backdrop
   Requirements: 1.3 - Semi-transparent backdrop
   ============================================ */
.auth-popup-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    cursor: pointer;
}

/* ============================================
   Modal Container
   Requirements: 1.3, 10.1 - Centered modal with clean design
   ============================================ */
.auth-popup-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    padding: var(--spacing-8);
    transform: scale(0.95) translateY(10px);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.auth-popup.auth-popup-open .auth-popup-container {
    transform: scale(1) translateY(0);
}

/* ============================================
   Close Button
   ============================================ */
.auth-popup-close {
    position: absolute;
    top: var(--spacing-4);
    right: var(--spacing-4);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-gray-400);
    cursor: pointer;
    transition: background-color 0.15s, color 0.15s;
}

.auth-popup-close:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

.auth-popup-close:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   Header
   Requirements: 10.2 - Brand logo at top
   ============================================ */
.auth-popup-header {
    text-align: center;
    margin-bottom: var(--spacing-6);
}

.auth-popup-logo {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-4);
}

.auth-popup-logo-img {
    max-width: 160px;
    max-height: 48px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.auth-popup-logo-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-popup-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin: 0 0 var(--spacing-1) 0;
}

.auth-popup-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin: 0;
}

/* ============================================
   Alert Messages
   ============================================ */
.auth-popup-alert {
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-sm);
}

.auth-popup-alert-error {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

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

/* ============================================
   Social Login Buttons
   Requirements: 10.5, 10.6 - Provider logos and consistent styling
   ============================================ */
.auth-popup-social {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.auth-popup-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.auth-popup-social-btn:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-300);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.auth-popup-social-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.auth-popup-social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.auth-popup-social-icon svg {
    width: 100%;
    height: 100%;
}

.auth-popup-social-text {
    flex: 1;
    text-align: center;
}

/* ============================================
   Divider
   Requirements: 10.5 - "OR" divider between social and email
   ============================================ */
.auth-popup-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin: var(--spacing-4) 0;
    color: var(--color-gray-400);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.auth-popup-divider::before,
.auth-popup-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-gray-200);
}

/* ============================================
   Step Transitions
   Requirements: 10.3 - Smooth transitions between steps
   ============================================ */
.auth-popup-step {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.auth-popup-step-active {
    opacity: 1;
    transform: translateX(0);
}

.auth-popup-step[hidden] {
    display: none;
}

/* ============================================
   Form Styles
   ============================================ */
.auth-popup-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.auth-popup-field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
}

.auth-popup-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
}

.auth-popup-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.auth-popup-forgot-link {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    text-decoration: none;
}

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

.auth-popup-input {
    width: 100%;
    padding: var(--spacing-3);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-gray-900);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.auth-popup-input::placeholder {
    color: var(--color-gray-400);
}

.auth-popup-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.auth-popup-input-error {
    border-color: #dc2626;
}

.auth-popup-input-error:focus {
    border-color: #dc2626;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.auth-popup-field-error {
    font-size: var(--font-size-xs);
    color: #dc2626;
    min-height: 1.25rem;
}

.auth-popup-field-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

/* ============================================
   Email Display (for password/register steps)
   ============================================ */
.auth-popup-email-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-3);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-2);
}

.auth-popup-email-display span {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    font-weight: var(--font-weight-medium);
}

.auth-popup-change-email {
    background: none;
    border: none;
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    cursor: pointer;
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-sm);
    transition: background-color 0.15s;
}

.auth-popup-change-email:hover {
    background: rgba(37, 99, 235, 0.1);
}

.auth-popup-change-email:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   Submit Button
   ============================================ */
.auth-popup-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    cursor: pointer;
    transition: opacity 0.15s, transform 0.15s;
    min-height: 44px;
}

.auth-popup-submit:hover:not(:disabled) {
    opacity: 0.92;
    transform: translateY(-1px);
}

.auth-popup-submit:active:not(:disabled) {
    transform: translateY(0);
}

.auth-popup-submit:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.auth-popup-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.auth-popup-submit-text,
.auth-popup-submit-loading {
    align-items: center;
    justify-content: center;
}

.auth-popup-submit-text {
    display: flex;
}

.auth-popup-submit-loading {
    display: none;
}

.auth-popup-submit-loading:not([hidden]) {
    display: flex;
}

/* ============================================
   Loading Spinner
   ============================================ */
.auth-popup-spinner {
    width: 20px;
    height: 20px;
    animation: auth-popup-spin 1s linear infinite;
}

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

/* ============================================
   Footer
   ============================================ */
.auth-popup-footer {
    margin-top: var(--spacing-6);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--color-gray-100);
}

.auth-popup-terms {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    text-align: center;
    margin: 0;
    line-height: 1.5;
}

.auth-popup-terms a {
    color: var(--color-gray-600);
    text-decoration: underline;
}

.auth-popup-terms a:hover {
    color: var(--color-gray-900);
}


/* ============================================
   Responsive Design
   Requirements: 10.4 - Mobile responsive
   ============================================ */
@media (max-width: 480px) {
    .auth-popup {
        padding: var(--spacing-2);
        align-items: flex-end;
    }

    .auth-popup-container {
        max-width: 100%;
        max-height: 95vh;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        padding: var(--spacing-6);
        transform: translateY(100%);
    }

    .auth-popup.auth-popup-open .auth-popup-container {
        transform: translateY(0);
    }

    .auth-popup-close {
        top: var(--spacing-3);
        right: var(--spacing-3);
    }

    .auth-popup-header {
        margin-bottom: var(--spacing-4);
    }

    .auth-popup-logo-img {
        max-width: 140px;
        max-height: 40px;
    }

    .auth-popup-title {
        font-size: var(--font-size-lg);
    }

    .auth-popup-social {
        gap: var(--spacing-2);
    }

    .auth-popup-social-btn {
        padding: var(--spacing-3);
    }

    .auth-popup-form {
        gap: var(--spacing-3);
    }

    .auth-popup-footer {
        margin-top: var(--spacing-4);
        padding-top: var(--spacing-3);
    }
}

@media (max-width: 360px) {
    .auth-popup-container {
        padding: var(--spacing-4);
    }

    .auth-popup-social-text {
        font-size: var(--font-size-xs);
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .auth-popup,
    .auth-popup-container,
    .auth-popup-step,
    .auth-popup-submit,
    .auth-popup-spinner {
        transition: none;
        animation: none;
    }
}

/* ============================================
   High Contrast Mode
   ============================================ */
@media (prefers-contrast: high) {
    .auth-popup-container {
        border: 2px solid var(--color-gray-900);
    }

    .auth-popup-input {
        border-width: 2px;
    }

    .auth-popup-social-btn {
        border-width: 2px;
    }
}

/* ============================================
   Dark Mode Support (optional)
   ============================================ */
@media (prefers-color-scheme: dark) {
    .auth-popup-container {
        background: #1f2937;
    }

    .auth-popup-title {
        color: #f9fafb;
    }

    .auth-popup-subtitle {
        color: #9ca3af;
    }

    .auth-popup-label {
        color: #e5e7eb;
    }

    .auth-popup-input {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }

    .auth-popup-input::placeholder {
        color: #9ca3af;
    }

    .auth-popup-input:focus {
        border-color: #667eea;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    }

    .auth-popup-social-btn {
        background: #374151;
        border-color: #4b5563;
        color: #e5e7eb;
    }

    .auth-popup-social-btn:hover {
        background: #4b5563;
        border-color: #6b7280;
    }

    .auth-popup-email-display {
        background: #374151;
    }

    .auth-popup-email-display span {
        color: #e5e7eb;
    }

    .auth-popup-divider {
        color: #6b7280;
    }

    .auth-popup-divider::before,
    .auth-popup-divider::after {
        background: #4b5563;
    }

    .auth-popup-footer {
        border-top-color: #374151;
    }

    .auth-popup-terms {
        color: #9ca3af;
    }

    .auth-popup-terms a {
        color: #d1d5db;
    }

    .auth-popup-alert-error {
        background: #450a0a;
        color: #fca5a5;
        border-color: #7f1d1d;
    }

    .auth-popup-alert-success {
        background: #052e16;
        color: #86efac;
        border-color: #166534;
    }
}

/* ============================================
   OTP Verification Step Styles
   ============================================ */
.auth-popup-otp-header {
    text-align: center;
    margin-bottom: var(--spacing-6);
}

.auth-popup-otp-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 50%;
    margin-bottom: var(--spacing-4);
    color: var(--color-primary);
}

.auth-popup-otp-text {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-1);
}

.auth-popup-otp-email {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
}

.auth-popup-otp-inputs {
    display: flex;
    gap: var(--spacing-2);
    justify-content: center;
    margin-bottom: var(--spacing-2);
}

.auth-popup-otp-input {
    width: 48px;
    height: 56px;
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    transition: all 0.15s ease;
    background: var(--color-white);
}

.auth-popup-otp-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.auth-popup-otp-input.filled {
    border-color: var(--color-primary);
    background-color: rgba(102, 126, 234, 0.03);
}

.auth-popup-otp-input.error {
    border-color: #dc2626;
}

.auth-popup-otp-input.success {
    border-color: #059669;
    background-color: rgba(5, 150, 105, 0.03);
}

.auth-popup-otp-timer {
    text-align: center;
    color: var(--color-gray-500);
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-4);
}

.auth-popup-otp-timer span {
    font-weight: var(--font-weight-medium);
}

.auth-popup-otp-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    margin-top: var(--spacing-4);
}

.auth-popup-otp-divider {
    color: var(--color-gray-300);
}

.auth-popup-link-btn {
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    padding: 0;
    transition: opacity 0.15s;
}

.auth-popup-link-btn:hover:not(:disabled) {
    text-decoration: underline;
}

.auth-popup-link-btn:disabled {
    color: var(--color-gray-400);
    cursor: not-allowed;
}

/* ============================================
   Phone Input with Country Code
   ============================================ */
.auth-popup-phone-input {
    display: flex;
    gap: var(--spacing-2);
}

.auth-popup-country-select {
    width: 100px;
    padding: var(--spacing-3);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    background: var(--color-white);
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.auth-popup-country-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.auth-popup-phone-number {
    flex: 1;
}

/* ============================================
   Verified Email Badge
   ============================================ */
.auth-popup-email-verified {
    justify-content: flex-start;
    gap: var(--spacing-2);
}

.auth-popup-verified-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: #059669;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.auth-popup-verified-badge svg {
    stroke: currentColor;
}

/* ============================================
   Dark Mode Support for New Elements
   ============================================ */
@media (prefers-color-scheme: dark) {
    .auth-popup-otp-input {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }

    .auth-popup-otp-input:focus {
        border-color: #667eea;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    }

    .auth-popup-country-select {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }

    .auth-popup-country-select:focus {
        border-color: #667eea;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    }

    .auth-popup-otp-text {
        color: #9ca3af;
    }

    .auth-popup-otp-timer {
        color: #9ca3af;
    }
}

/* ============================================
   Responsive Adjustments for OTP
   ============================================ */
@media (max-width: 480px) {
    .auth-popup-otp-input {
        width: 40px;
        height: 48px;
        font-size: var(--font-size-lg);
    }

    .auth-popup-country-select {
        width: 90px;
        font-size: var(--font-size-xs);
    }
}