/**
 * PHASE 2: PERFORMANCE & UX ENHANCEMENTS - CSS
 * Offline indicators, form persistence, preview modal, tooltips, loading states
 */

/* ===== OFFLINE INDICATOR ===== */
#offlineIndicator {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
    padding: 14px 18px;
    border-radius: 12px;
    display: none;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    z-index: 999;
    animation: slideUp 0.3s ease-out;
}

#offlineIndicator i {
    font-size: 18px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@media (max-width: 480px) {
    #offlineIndicator {
        left: 10px;
        right: 10px;
        bottom: 10px;
        padding: 12px 16px;
        font-size: 13px;
    }
}

/* ===== RESUME BANNER ===== */
.resume-banner {
    background: linear-gradient(to right, #dbeafe, #e0f2fe);
    border-bottom: 3px solid #0ea5e9;
    padding: 16px 24px;
    animation: slideDown 0.3s ease-out;
    z-index: 998;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.resume-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 20px;
    justify-content: space-between;
    flex-wrap: wrap;
}

.resume-content i {
    font-size: 28px;
    color: #0369a1;
    flex-shrink: 0;
}

.resume-text h4 {
    margin: 0 0 4px 0;
    color: #0369a1;
    font-size: 16px;
    font-weight: 700;
}

.resume-text p {
    margin: 0;
    color: #075a8f;
    font-size: 13px;
}

.resume-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-resume-yes,
.btn-resume-no {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-resume-yes {
    background: #0369a1;
    color: white;
}

.btn-resume-yes:hover {
    background: #0c5a8c;
    transform: translateY(-2px);
}

.btn-resume-no {
    background: white;
    color: #0369a1;
    border: 1px solid #0369a1;
}

.btn-resume-no:hover {
    background: #f0f9ff;
}

@media (max-width: 480px) {
    .resume-banner {
        padding: 12px 16px;
    }
    .resume-content {
        gap: 12px;
    }
    .resume-actions {
        width: 100%;
    }
    .btn-resume-yes,
    .btn-resume-no {
        flex: 1;
    }
}

/* ===== FORM TOOLTIPS ===== */
.form-tooltip {
    position: relative;
    display: inline-block;
    margin-left: 8px;
}

.tooltip-trigger {
    background: none;
    border: none;
    color: #0ea5e9;
    font-size: 14px;
    cursor: pointer;
    padding: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    transition: all 0.2s ease;
}

.tooltip-trigger:hover {
    background: #ecf0f1;
    color: #0369a1;
    transform: scale(1.15);
}

.tooltip-content {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #1a1a1a;
    color: white;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.4;
    white-space: nowrap;
    z-index: 1000;
    margin-bottom: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    max-width: 200px;
    white-space: normal;
}

.tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: #1a1a1a;
}

.form-tooltip.active .tooltip-content {
    display: block;
    animation: fadeInUp 0.2s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ===== FORM PREVIEW MODAL ===== */
.preview-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.preview-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.preview-container {
    position: relative;
    background: white;
    border-radius: 16px;
    max-width: 700px;
    width: 90%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideInUp 0.3s ease-out;
}

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

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid #e5e7eb;
}

.preview-header h2 {
    margin: 0;
    color: #1f2937;
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    border: none;
}

.preview-header h2 i {
    color: #0ea5e9;
}

.preview-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #6b7280;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    transition: all 0.2s ease;
}

.preview-close:hover {
    background: #f3f4f6;
    color: #1f2937;
}

.preview-content {
    overflow-y: auto;
    padding: 24px;
    flex: 1;
}

.preview-section {
    margin-bottom: 24px;
}

.preview-section h3 {
    color: #1f2937;
    font-size: 15px;
    font-weight: 700;
    margin: 0 0 12px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    border: none;
    padding: 0;
}

.preview-section h3 i {
    color: #0ea5e9;
    font-size: 16px;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.preview-item {
    background: #f9fafb;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
}

.preview-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.preview-value {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #1f2937;
    word-break: break-word;
}

.preview-footer {
    padding: 20px 24px;
    border-top: 1px solid #e5e7eb;
    background: #f9fafb;
    border-radius: 0 0 16px 16px;
}

.preview-note {
    font-size: 12px;
    color: #6b7280;
    margin: 0 0 16px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-note i {
    color: #0ea5e9;
    flex-shrink: 0;
}

.preview-actions {
    display: flex;
    gap: 12px;
}

.btn-preview-edit,
.btn-preview-submit {
    flex: 1;
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-preview-edit {
    background: #e5e7eb;
    color: #374151;
}

.btn-preview-edit:hover {
    background: #d1d5db;
}

.btn-preview-submit {
    background: #10b981;
    color: white;
}

.btn-preview-submit:hover {
    background: #059669;
    transform: translateY(-2px);
}

/* ===== PREVIEW BUTTON ===== */
.btn-preview {
    padding: 10px 16px;
    background: white;
    border: 1px solid #d1d5db;
    color: #374151;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-preview:hover {
    background: #f3f4f6;
    border-color: #9ca3af;
}

/* ===== NOTIFICATIONS ===== */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 14px 18px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 600;
    z-index: 2001;
    animation: slideInRight 0.3s ease-out;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.notification.fade-out {
    animation: slideOutRight 0.3s ease-in;
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

.notification-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.notification-success i {
    color: #28a745;
}

.notification-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.notification-error i {
    color: #dc3545;
}

.notification-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.notification-warning i {
    color: #ffc107;
}

.notification-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.notification-info i {
    color: #17a2b8;
}

.notification-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 16px;
    padding: 0 4px;
    display: flex;
    align-items: center;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.notification-close:hover {
    opacity: 1;
}

@media (max-width: 480px) {
    .notification {
        top: 10px;
        right: 10px;
        left: 10px;
        width: calc(100% - 20px);
    }
}

/* ===== LOADING STATES ===== */
.page-loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.2s ease-out;
}

.page-loading.fade-out {
    animation: fadeOut 0.3s ease-in;
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
        pointer-events: none;
    }
}

.loading-container {
    text-align: center;
}

.loading-spinner {
    display: inline-block;
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
}

.spinner-ring {
    display: inline-block;
    width: 60px;
    height: 60px;
    border: 4px solid rgba(26, 82, 118, 0.15);
    border-top-color: #1a5276;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-message {
    font-size: 16px;
    font-weight: 600;
    color: #1f2937;
    margin: 0;
}

/* ===== LOADING SKELETON ===== */
.loading-skeleton {
    animation: pulse 1.5s ease-in-out infinite;
}

.skeleton-item {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.skeleton-title {
    height: 24px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.skeleton-field {
    height: 40px;
    border-radius: 8px;
    margin-bottom: 12px;
}

.skeleton-group {
    margin-bottom: 16px;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ===== VALIDATION ERROR TOAST ===== */
.validation-error-toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #dc3545;
    color: white;
    padding: 12px 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 14px;
    z-index: 2001;
    animation: slideInRight 0.3s ease-out;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.validation-error-toast.fade-out {
    animation: slideOutRight 0.3s ease-in;
}

.validation-error-toast i {
    font-size: 16px;
}

.field-error {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.25) !important;
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 768px) {
    .preview-grid {
        grid-template-columns: 1fr;
    }

    .preview-container {
        width: 95%;
        max-height: 90vh;
    }
}

@media (max-width: 480px) {
    .preview-container {
        width: 100%;
        max-height: 100vh;
        border-radius: 16px 16px 0 0;
        bottom: 0;
    }

    .preview-overlay {
        background: rgba(0, 0, 0, 0.4);
    }

    .validation-error-toast {
        left: 10px;
        right: 10px;
        bottom: 10px;
    }

    .resume-actions {
        flex-direction: column;
    }
}

/* ===== UTILITY CLASSES ===== */
.fade-out {
    animation: fadeOut 0.3s ease-in forwards;
}

.shake {
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.highlight-field {
    box-shadow: 0 0 0 3px rgba(42, 111, 173, 0.3) !important;
}