/* Loading States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

[data-theme="dark"] .loading-overlay {
    background-color: rgba(0, 0, 0, 0.7);
}

/* Main spinner */
.spinner-container {
    background-color: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    text-align: center;
    animation: fadeInScale 0.3s ease;
}

[data-theme="dark"] .spinner-container {
    background-color: #2d2d2d;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Construction-themed spinner */
.construction-spinner {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    position: relative;
}

.crane-arm {
    width: 60px;
    height: 4px;
    background-color: #f39c12;
    position: absolute;
    top: 20px;
    left: 10px;
    transform-origin: left center;
    animation: craneSwing 2s ease-in-out infinite;
}

.crane-cable {
    width: 2px;
    height: 30px;
    background-color: #333;
    position: absolute;
    right: 0;
    top: 4px;
    animation: cableSwing 2s ease-in-out infinite;
}

[data-theme="dark"] .crane-cable {
    background-color: #e0e0e0;
}

.crane-load {
    width: 15px;
    height: 15px;
    background-color: #e74c3c;
    position: absolute;
    bottom: -15px;
    right: -6.5px;
    animation: loadSwing 2s ease-in-out infinite;
}

@keyframes craneSwing {
    0%, 100% { transform: rotate(-20deg); }
    50% { transform: rotate(20deg); }
}

@keyframes cableSwing {
    0%, 100% { transform: rotate(5deg); }
    50% { transform: rotate(-5deg); }
}

@keyframes loadSwing {
    0%, 100% { transform: rotate(10deg); }
    50% { transform: rotate(-10deg); }
}

/* Alternative simple spinner */
.simple-spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

[data-theme="dark"] .simple-spinner {
    border-color: #404040;
    border-top-color: #3498db;
}

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

/* Loading text */
.loading-text {
    color: #333;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

[data-theme="dark"] .loading-text {
    color: #e0e0e0;
}

.loading-subtext {
    color: #666;
    font-size: 0.9rem;
}

[data-theme="dark"] .loading-subtext {
    color: #b0b0b0;
}

/* Inline loading states */
.loading-inline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.spinner-small {
    width: 1rem;
    height: 1rem;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

[data-theme="dark"] .spinner-small {
    border-color: #404040;
    border-top-color: #3498db;
}

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

[data-theme="dark"] .skeleton {
    background: linear-gradient(90deg, #2d2d2d 25%, #3d3d3d 50%, #2d2d2d 75%);
}

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

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
}

.skeleton-title {
    height: 2rem;
    width: 60%;
    margin-bottom: 1rem;
}

.skeleton-card {
    height: 150px;
    border-radius: 8px;
    margin-bottom: 1rem;
}

/* Button loading states */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: "";
    position: absolute;
    width: 1rem;
    height: 1rem;
    top: 50%;
    left: 50%;
    margin-left: -0.5rem;
    margin-top: -0.5rem;
    border: 2px solid #ffffff;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn-secondary.btn-loading::after {
    border-color: #333;
    border-top-color: transparent;
}

[data-theme="dark"] .btn-secondary.btn-loading::after {
    border-color: #e0e0e0;
    border-top-color: transparent;
}

/* Card loading state */
.card-loading {
    position: relative;
    overflow: hidden;
}

.card-loading::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    z-index: 1;
}

[data-theme="dark"] .card-loading::before {
    background: rgba(0, 0, 0, 0.5);
}

.card-loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2rem;
    height: 2rem;
    margin-left: -1rem;
    margin-top: -1rem;
    border: 3px solid #f3f3f3;
    border-top-color: #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 2;
}

/* Progress bar */
.progress-bar-container {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    height: 4px;
    background-color: rgba(0, 0, 0, 0.1);
    z-index: 1001;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.progress-bar-container.active {
    opacity: 1;
}

.progress-bar {
    height: 100%;
    background-color: #3498db;
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}

/* Pulse animation for real-time updates */
@keyframes pulse-bg {
    0% { background-color: inherit; }
    50% { background-color: rgba(52, 152, 219, 0.1); }
    100% { background-color: inherit; }
}

.updating {
    animation: pulse-bg 1s ease-in-out;
}

[data-theme="dark"] .updating {
    animation: pulse-bg-dark 1s ease-in-out;
}

@keyframes pulse-bg-dark {
    0% { background-color: inherit; }
    50% { background-color: rgba(52, 152, 219, 0.2); }
    100% { background-color: inherit; }
}