/* =============================================================
   Global Application Loader
   -------------------------------------------------------------
   Pure-CSS overlay + animated SVG spinner. Brand palette matches
   admin theme: dark blue (#2b2d5c) and gold (#ECCB63).
   z-index sits above Bootstrap modals (1055) and toastr.
   ============================================================= */

:root {
    --app-loader-z: 100000;
    --app-loader-backdrop: rgba(15, 23, 42, 0.45);
    --app-loader-card-bg: #ffffff;
    --app-loader-track: rgba(43, 45, 92, 0.15);
    --app-loader-indicator: #ECCB63;
    --app-loader-text: #2b2d5c;
}

.app-loader {
    position: fixed;
    inset: 0;
    z-index: var(--app-loader-z);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 200ms ease, visibility 0s linear 200ms;
}

.app-loader.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity 200ms ease, visibility 0s linear 0s;
}

.app-loader__backdrop {
    position: absolute;
    inset: 0;
    background: var(--app-loader-backdrop);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
}

.app-loader__card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.25rem 1.75rem;
    min-width: 140px;
    background: var(--app-loader-card-bg);
    border-radius: 14px;
    box-shadow:
        0 10px 30px rgba(15, 23, 42, 0.25),
        0 2px 6px rgba(15, 23, 42, 0.10);
    transform: translateY(4px) scale(0.98);
    transition: transform 200ms ease;
}

.app-loader.is-visible .app-loader__card {
    transform: translateY(0) scale(1);
}

.app-loader__spinner {
    display: block;
    width: 56px;
    height: 56px;
    animation: app-loader-rotate 1.4s linear infinite;
    transform-origin: center;
}

.app-loader__track {
    stroke: var(--app-loader-track);
}

.app-loader__indicator {
    stroke: var(--app-loader-indicator);
    stroke-dasharray: 138;       /* 2 * π * r (r = 22) ≈ 138 */
    stroke-dashoffset: 0;
    transform-origin: center;
    animation: app-loader-dash 1.4s ease-in-out infinite;
}

.app-loader__label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--app-loader-text);
    letter-spacing: 0.01em;
    line-height: 1;
}

@keyframes app-loader-rotate {
    100% { transform: rotate(360deg); }
}

@keyframes app-loader-dash {
    0% {
        stroke-dasharray: 1, 138;
        stroke-dashoffset: 0;
    }
    50% {
        stroke-dasharray: 90, 138;
        stroke-dashoffset: -34;
    }
    100% {
        stroke-dasharray: 90, 138;
        stroke-dashoffset: -124;
    }
}

/* Block accidental double-submits while overlay is up.
   The overlay itself blocks clicks, but disabling pointer-events
   on the rest of the page is a belt-and-suspenders measure for
   layouts where the overlay might briefly mount late. */
body.app-loader-active {
    cursor: progress;
}

/* Honor user motion preferences: slow the animation but keep
   movement so the loader still looks alive. */
@media (prefers-reduced-motion: reduce) {
    .app-loader__spinner {
        animation-duration: 3s;
    }
    .app-loader__indicator {
        animation-duration: 3s;
    }
    .app-loader,
    .app-loader__card {
        transition-duration: 0ms;
    }
}