/* Enhanced Loading System - Enterprise Grade */

/* Page Loading Overlay - Enhanced */
.page-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.98) 0%, rgba(30, 41, 59, 0.98) 100%);
    z-index: 99999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.page-loading-overlay.active {
    display: flex;
    opacity: 1;
}

.page-loading-content {
    text-align: center;
    color: #ffffff;
    position: relative;
}

/* Enhanced Spinner - Multi-layer */
.page-loading-spinner {
    width: 90px;
    height: 90px;
    position: relative;
    margin: 0 auto 2rem;
    animation: pulse-page-spinner 2s ease-in-out infinite;
}

@keyframes pulse-page-spinner {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.08);
    }
}

.page-loading-spinner::before,
.page-loading-spinner::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.page-loading-spinner::before {
    border: 4px solid rgba(59, 130, 246, 0.15);
    border-top-color: rgba(59, 130, 246, 0.5);
    animation: spin-outer 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.page-loading-spinner::after {
    border: 3px solid transparent;
    border-top-color: #3b82f6;
    border-right-color: #3b82f6;
    animation: spin-inner 0.8s linear infinite;
    width: 60%;
    height: 60%;
    top: 20%;
    left: 20%;
}

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

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

.page-loading-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    margin-top: 1.5rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

/* Loading Pulse Dots */
.loading-pulse {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #3b82f6;
    margin: 0 3px;
    animation: pulse-dot 1.4s ease-in-out infinite;
    vertical-align: middle;
}

.loading-pulse:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-pulse:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes pulse-dot {
    0%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1.3);
    }
}

/* Form Submission Loading */
.form-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.92);
    z-index: 99998;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.form-loading-overlay.active {
    display: flex;
    opacity: 1;
}

.form-loading-content {
    background: #ffffff;
    padding: 3.5rem 4rem;
    border-radius: 20px;
    box-shadow: 0 30px 100px rgba(0, 0, 0, 0.5);
    text-align: center;
    min-width: 350px;
    animation: slideUpScale 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
    border: 2px solid rgba(59, 130, 246, 0.1);
}

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

@keyframes slideUpScale {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.form-loading-spinner {
    width: 70px;
    height: 70px;
    position: relative;
    margin: 0 auto 2rem;
    animation: pulse-spinner 2s ease-in-out infinite;
}

@keyframes pulse-spinner {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.form-loading-spinner::before,
.form-loading-spinner::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.form-loading-spinner::before {
    border: 5px solid #e5e7eb;
    border-top-color: rgba(59, 130, 246, 0.5);
    animation: spin-outer-form 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.form-loading-spinner::after {
    border: 4px solid transparent;
    border-top-color: #3b82f6;
    border-right-color: #3b82f6;
    animation: spin-inner-form 0.8s linear infinite;
    width: 65%;
    height: 65%;
    top: 17.5%;
    left: 17.5%;
}

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

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

.form-loading-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1f2937;
    margin: 0;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

/* Button Loading State */
.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.85;
    cursor: not-allowed !important;
    transition: opacity 0.2s ease;
}

.btn-loading i.fa-spinner {
    animation: spin 0.8s linear infinite;
    margin-right: 0.5rem;
    display: inline-block;
}

/* Transaction Loading Indicator */
.transaction-loading {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: #ffffff;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    display: none;
    align-items: center;
    gap: 1rem;
    z-index: 99997;
    animation: slideInRight 0.3s ease-out;
    min-width: 250px;
}

.transaction-loading.active {
    display: flex;
}

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

.transaction-loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid #e5e7eb;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

.transaction-loading-text {
    font-size: 0.9rem;
    font-weight: 500;
    color: #1f2937;
    margin: 0;
}

/* Page Content Fade Transitions - Enhanced */
.main-content {
    opacity: 1;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
}

.main-content.fade-out {
    opacity: 0;
    transform: translateY(-15px);
}

.main-content.fade-in {
    animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

/* Body Loading State */
body.page-loading {
    overflow: hidden;
    opacity: 0.95;
}

body.form-loading {
    overflow: hidden;
}

/* RTL Support */
[dir="rtl"] .transaction-loading {
    right: auto;
    left: 2rem;
    animation: slideInLeft 0.3s ease-out;
}

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

/* Responsive */
@media (max-width: 768px) {
    .page-loading-spinner {
        width: 60px;
        height: 60px;
    }
    
    .page-loading-text {
        font-size: 0.95rem;
    }
    
    .form-loading-content {
        padding: 2rem 1.5rem;
        min-width: 240px;
    }
    
    .transaction-loading {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        min-width: auto;
    }
}