/* ==================== LOADING STATES & ANIMATIONS ==================== */

/* Page Loading Overlay */
.qc-page-loader {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: saturate(200%) blur(30px);
    -webkit-backdrop-filter: saturate(200%) blur(30px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.4s cubic-bezier(0.2, 0, 0, 1);
}

.qc-page-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Spinner Styles */
.qc-loader-spinner {
    width: 36px;
    height: 36px;
    position: relative;
}

.qc-loader-spinner::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2.5px solid rgba(0, 0, 0, 0.05);
    border-top-color: var(--qc-primary);
    border-right-color: rgba(191, 90, 242, 0.4);
    animation: spin 0.65s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Logo Animation */
.qc-loader-logo {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--qc-primary) 0%, var(--qc-accent) 100%);
    border-radius: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    font-size: 21px;
    margin-bottom: 18px;
    animation: qcLoaderPulse 1.8s ease-in-out infinite;
}

@keyframes qcLoaderPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(0.96); }
}

.qc-loader-text {
    margin-top: 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--qc-gray-500);
    letter-spacing: 0.01em;
}

/* Skeleton Loading */
.qc-skeleton-wrapper {
    animation: fadeIn 0.3s ease;
}

.qc-skeleton {
    background: linear-gradient(
        90deg,
        var(--qc-gray-100) 0%,
        var(--qc-gray-200) 50%,
        var(--qc-gray-100) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--qc-border-radius);
}

.qc-skeleton-text {
    height: 16px;
    margin-bottom: 10px;
}

.qc-skeleton-text:last-child {
    width: 60%;
}

.qc-skeleton-heading {
    height: 28px;
    width: 40%;
    margin-bottom: 16px;
}

.qc-skeleton-card {
    height: 200px;
    border-radius: var(--qc-border-radius-lg);
}

.qc-skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.qc-skeleton-button {
    height: 40px;
    width: 120px;
    border-radius: var(--qc-border-radius);
}

/* Content Loading State */
.qc-content-loading {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 24px;
    animation: fadeIn 0.3s ease;
}

.qc-skeleton-project-card {
    background: #fff;
    border: 1px solid var(--qc-gray-200);
    border-radius: var(--qc-border-radius-lg);
    padding: 24px;
    box-shadow: var(--qc-shadow-sm);
}

.qc-skeleton-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.qc-skeleton-body {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

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

.qc-btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* Form Loading Overlay */
.qc-form-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.5;
}

.qc-form-loading::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 10;
    border-radius: var(--qc-border-radius-lg);
}

.qc-form-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 36px;
    height: 36px;
    margin: -18px 0 0 -18px;
    border: 2.5px solid var(--qc-gray-200);
    border-top-color: var(--qc-primary);
    border-right-color: rgba(191, 90, 242, 0.4);
    border-radius: 50%;
    animation: spin 0.65s linear infinite;
    z-index: 11;
}

/* Inline Loading Indicator */
.qc-inline-loader {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: var(--qc-font-size-sm);
    color: var(--qc-gray-600);
}

.qc-inline-loader-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--qc-gray-300);
    border-top-color: var(--qc-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* (Old progress bar CSS removed — see qcenter-navbar.css .qc-progress) */

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

/* Dots Loading Animation */
.qc-dots-loader {
    display: inline-flex;
    gap: 6px;
    align-items: center;
}

.qc-dots-loader span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--qc-primary), var(--qc-accent));
    animation: dotPulse 1.4s ease-in-out infinite;
}

.qc-dots-loader span:nth-child(2) {
    animation-delay: 0.2s;
}

.qc-dots-loader span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes dotPulse {
    0%, 80%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    40% {
        opacity: 1;
        transform: scale(1.2);
    }
}

/* Pulse Circle Loader */
.qc-pulse-loader {
    position: relative;
    width: 50px;
    height: 50px;
}

.qc-pulse-loader::before,
.qc-pulse-loader::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2.5px solid var(--qc-primary);
    animation: pulseRing 2s ease-out infinite;
}

.qc-pulse-loader::after {
    animation-delay: 1s;
}

@keyframes pulseRing {
    0% {
        transform: scale(0.5);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

/* Card Loading Shimmer */
.qc-card-loading {
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.6) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

/* Table Loading Rows */
.qc-table-loading tr {
    animation: fadeIn 0.3s ease;
}

.qc-table-loading td {
    position: relative;
    overflow: hidden;
}

.qc-table-loading td::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--qc-gray-100) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

/* Initial Page Load */
.qc-page-loading {
    animation: fadeIn 0.5s ease;
}

/* Fade Out Animation */
.qc-fade-out {
    animation: fadeOut 0.3s ease forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}