/**
 * Page Loader - Professional Corporate Design
 * Smooth, modern, minimal spinner for page transitions
 */

/* Loader Container */
#page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity 0.3s ease-out;
}

/* Show loader */
#page-loader.active {
    display: flex;
    opacity: 1;
}

/* Spinner Container */
.loader-spinner {
    position: relative;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Main rotating ring */
.loader-ring {
    position: absolute;
    width: 60px;
    height: 60px;
    border: 3px solid #f0f0f0;
    border-top: 3px solid #1a73e8;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.2);
}

/* Secondary ring (optional sophistication) */
.loader-ring::after {
    content: '';
    position: absolute;
    width: 45px;
    height: 45px;
    border: 2px solid transparent;
    border-right: 2px solid rgba(26, 115, 232, 0.3);
    border-radius: 50%;
    animation: spin-reverse 1.5s linear infinite;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Loader text */
.loader-text {
    position: absolute;
    font-size: 12px;
    color: #666;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    top: 50%;
    left: 50%;
    transform: translate(-50%, 60px);
    animation: fade-in-out 2s ease-in-out infinite;
}

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

@keyframes spin-reverse {
    0% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
}

@keyframes fade-in-out {
    0%, 100% {
        opacity: 0.5;
    }
    50% {
        opacity: 1;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .loader-ring {
        width: 50px;
        height: 50px;
        border: 2px solid #f0f0f0;
        border-top: 2px solid #1a73e8;
    }

    .loader-ring::after {
        width: 38px;
        height: 38px;
        border-width: 1.5px;
    }

    .loader-text {
        font-size: 10px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    #page-loader {
        background: rgba(25, 25, 25, 0.95);
    }

    .loader-ring {
        border: 3px solid #333;
    }

    .loader-text {
        color: #999;
    }
}