/* ========================================
   MODERN LOADER & SMOOTH SCROLLER STYLES
   ======================================== */

/* ===== PAGE LOADER ===== */
.page-loader {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%) !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    align-items: center !important;
    z-index: 99999 !important;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out !important;
    margin: 0 !important;
    padding: 0 !important;
}

.page-loader.fade-out {
    opacity: 0;
    visibility: hidden;
}

/* ===== MAIN LOADER ANIMATION ===== */
.loader-container {
    position: relative !important;
    width: 120px !important;
    height: 120px !important;
    margin-bottom: 30px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

.loader-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-radius: 50%;
    animation: spin 2s linear infinite;
}

.loader-ring:nth-child(1) {
    border-top-color: #3b82f6;
    animation-duration: 2s;
}

.loader-ring:nth-child(2) {
    border-right-color: #8b5cf6;
    animation-duration: 1.5s;
    animation-direction: reverse;
    width: 90%;
    height: 90%;
    top: 5%;
    left: 5%;
}

.loader-ring:nth-child(3) {
    border-bottom-color: #06b6d4;
    animation-duration: 1s;
    width: 80%;
    height: 80%;
    top: 10%;
    left: 10%;
}

.loader-ring:nth-child(4) {
    border-left-color: #10b981;
    animation-duration: 0.8s;
    animation-direction: reverse;
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
}

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

/* ===== LOADER LOGO ===== */
.loader-logo {
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    width: 50px !important;
    height: 50px !important;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6) !important;
    border-radius: 12px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    animation: pulse 2s ease-in-out infinite !important;
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.5) !important;
    z-index: 100 !important;
}

.loader-logo i {
    color: white;
    font-size: 24px;
    animation: bounce 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.1); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* ===== LOADING TEXT ===== */
.loader-text {
    color: white !important;
    font-size: 1.2rem !important;
    font-weight: 600 !important;
    margin-bottom: 10px !important;
    opacity: 0 !important;
    animation: fadeInUp 0.8s ease-out 0.5s forwards !important;
    text-align: center !important;
    width: 100% !important;
}

.loader-subtext {
    color: #94a3b8;
    font-size: 0.9rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

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

/* ===== PROGRESS BAR ===== */
.loader-progress {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 20px;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 1.1s forwards;
}

.loader-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
    border-radius: 2px;
    width: 0%;
    animation: progress 3s ease-out forwards;
    position: relative;
}

.loader-progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes progress {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== SMOOTH SCROLLER ===== */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 4px;
    transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
}

/* ===== SCROLL TO TOP BUTTON ===== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(59, 130, 246, 0.4);
}

.scroll-to-top:active {
    transform: translateY(-1px);
}

/* Chatbot mode styling */
.scroll-to-top.chatbot-mode {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    box-shadow: 0 4px 20px rgba(34, 197, 94, 0.3);
}

.scroll-to-top.chatbot-mode:hover {
    background: linear-gradient(135deg, #16a34a, #15803d);
    box-shadow: 0 6px 25px rgba(34, 197, 94, 0.4);
}

/* ===== LOADING STATES FOR BUTTONS ===== */
.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ===== LOADING STATES FOR FORMS ===== */
.form-loading {
    position: relative;
    pointer-events: none;
}

.form-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid #e5e7eb;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 11;
}

/* ===== SKELETON LOADING ===== */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 4px;
}

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

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-text.short {
    width: 60%;
}

.skeleton-text.medium {
    width: 80%;
}

.skeleton-text.long {
    width: 100%;
}

.skeleton-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

.skeleton-card {
    height: 200px;
    border-radius: 8px;
}

/* ===== PAGE TRANSITIONS ===== */
.page-transition {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.page-transition.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* ===== LAZY LOADING ===== */
.lazy-load {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.lazy-load.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .loader-container {
        width: 80px;
        height: 80px;
    }
    
    .loader-logo {
        width: 35px;
        height: 35px;
    }
    
    .loader-logo i {
        font-size: 18px;
    }
    
    .loader-text {
        font-size: 1rem;
    }
    
    .loader-subtext {
        font-size: 0.8rem;
    }
    
    .loader-progress {
        width: 150px;
    }
    
    .scroll-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
        font-size: 16px;
    }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
    ::-webkit-scrollbar-track {
        background: #1e293b;
    }
    
    .skeleton {
        background: linear-gradient(90deg, #374151 25%, #4b5563 50%, #374151 75%);
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    .page-loader,
    .loader-ring,
    .loader-logo,
    .loader-logo i,
    .loader-text,
    .loader-subtext,
    .loader-progress,
    .loader-progress-bar,
    .scroll-to-top,
    .btn-loading::after,
    .form-loading::after,
    .skeleton,
    .page-transition,
    .lazy-load {
        animation: none;
        transition: none;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
.page-loader,
.loader-ring,
.loader-logo,
.scroll-to-top {
    will-change: transform, opacity;
}

/* ===== ELEMENT LOADER ===== */
.element-loader {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: 8px;
}

.element-loader-content {
    text-align: center;
}

.element-loader-spinner {
    width: 30px;
    height: 30px;
    border: 3px solid #e5e7eb;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

.element-loader-text {
    color: #64748b;
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 15px 20px;
    z-index: 10000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    max-width: 300px;
}

.toast.show {
    transform: translateX(0);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast i {
    font-size: 18px;
}

.toast-success {
    border-left: 4px solid #22c55e;
}

.toast-success i {
    color: #22c55e;
}

.toast-error {
    border-left: 4px solid #ef4444;
}

.toast-error i {
    color: #ef4444;
}

.toast-warning {
    border-left: 4px solid #f59e0b;
}

.toast-warning i {
    color: #f59e0b;
}

.toast-info {
    border-left: 4px solid #3b82f6;
}

.toast-info i {
    color: #3b82f6;
}

/* ===== SKELETON ITEM ===== */
.skeleton-item {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.skeleton-content {
    flex: 1;
}

/* ===== PRINT STYLES ===== */
@media print {
    .page-loader,
    .scroll-to-top,
    .toast {
        display: none !important;
    }
}