/* ============================================================================ */
/* CENTRALIZED LOADER SYSTEM - CSS Styles */
/* ============================================================================ */

.global-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(8px);
}

.loader-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: rgba(30, 41, 59, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(20px);
    min-width: 200px;
    text-align: center;
    animation: loaderFadeIn 0.3s ease-out;
}

.loader-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(99, 102, 241, 0.2);
    border-top: 3px solid #6366f1;
    border-radius: 50%;
    animation: loaderSpin 1s linear infinite;
}

.loader-text {
    color: #e2e8f0;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.025em;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

@keyframes loaderFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Small loader variant for inline use */
.loader-small {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
    padding: 2rem;
}

.loader-small .loader-spinner {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.loader-small .loader-text {
    font-size: 0.875rem;
}

/* Button loader state */
.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: loaderSpin 1s linear infinite;
}

.btn-loading .btn-text {
    opacity: 0;
}

/* Inline loader */
.inline-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    width: 100%;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .loader-container {
        padding: 1.5rem;
        min-width: 180px;
        margin: 1rem;
    }
    
    .loader-spinner {
        width: 40px;
        height: 40px;
        border-width: 2.5px;
    }
    
    .loader-text {
        font-size: 0.9rem;
    }
}

/* Loading overlay for specific containers */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: inherit;
}

.loading-overlay .loader-small {
    padding: 1rem;
}

/* Pulse animation for skeleton loading */
.skeleton-loader {
    background: linear-gradient(90deg, rgba(255,255,255,0.1) 25%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0.1) 75%);
    background-size: 200% 100%;
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

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