/**
 * SynX Economy - Loader Component
 * 
 * Sistema de loading profissional:
 * - Page Loader: overlay leve (glass) com animação de partículas formando X
 * - Data Loader: skeleton/loading bar para filtros/paginação
 * 
 * @version 2.0.0
 */

/* ============================================
   PAGE LOADER - Overlay glass com canvas de partículas
   ============================================ */

.page-loader {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Glass leve - não cobre pesado */
    background: rgba(5, 6, 7, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 1;
    visibility: visible;
    transition: opacity 0.35s ease, visibility 0.35s ease;
}

/* Estado inicial: escondido até SHOW_DELAY passar */
.page-loader.pending {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

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

.page-loader.hidden {
    display: none;
}

/* Canvas de partículas do X */
.page-loader__canvas {
    width: 140px;
    height: 140px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.page-loader.hiding .page-loader__canvas {
    transform: scale(0.985);
    opacity: 0;
}

/* Fallback spinner (quando canvas não funciona) */
.page-loader__fallback {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.page-loader--no-canvas .page-loader__canvas {
    display: none;
}

.page-loader--no-canvas .page-loader__fallback {
    display: flex;
}

.page-loader__fallback-logo {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-loader__fallback-x {
    font-family: 'Inter', sans-serif;
    font-size: 48px;
    font-weight: 700;
    color: var(--color-neon-green, #00FF41);
    text-shadow: 
        0 0 20px rgba(0, 255, 65, 0.5),
        0 0 40px rgba(0, 255, 65, 0.3);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(0.95);
    }
}

.page-loader__fallback-ring {
    position: absolute;
    width: 72px;
    height: 72px;
    border: 2px solid var(--color-border, #2a2a2f);
    border-radius: 50%;
}

.page-loader__fallback-ring::before {
    content: '';
    position: absolute;
    inset: -2px;
    border: 2px solid transparent;
    border-top-color: var(--color-neon-green, #00FF41);
    border-radius: 50%;
    animation: loader-spin 1s linear infinite;
}

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

/* ============================================
   DATA LOADER - Para filtros/paginação
   ============================================ */

/* Container loading state */
.data-loading {
    position: relative;
    pointer-events: none;
    min-height: 100px;
}

.data-loading::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(10, 10, 12, 0.5);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: 5;
    border-radius: inherit;
    animation: fade-in 0.15s ease;
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Loading bar no topo do container */
.data-loader-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-border, #2a2a2f);
    z-index: 10;
    overflow: hidden;
    border-radius: 2px 2px 0 0;
}

.data-loader-bar::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--color-neon-green, #00FF41) 50%,
        transparent 100%
    );
    animation: slide-bar 1s ease-in-out infinite;
}

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

/* Spinner centralizado no container */
.data-loader-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-3, 12px);
}

.data-loader-spinner__icon {
    width: 32px;
    height: 32px;
    border: 2px solid var(--color-border, #2a2a2f);
    border-top-color: var(--color-neon-green, #00FF41);
    border-radius: 50%;
    animation: loader-spin 0.8s linear infinite;
}

.data-loader-spinner__text {
    font-size: var(--font-size-xs, 12px);
    color: var(--color-text-secondary, #a0a0a5);
    font-weight: 500;
}

/* ============================================
   SKELETON TABLE ROWS
   ============================================ */

.skeleton-row {
    display: flex;
    gap: var(--spacing-3, 12px);
    padding: var(--spacing-4, 16px);
    border-bottom: 1px solid var(--color-border, #2a2a2f);
}

.skeleton-row:last-child {
    border-bottom: none;
}

.skeleton-cell {
    background: linear-gradient(
        90deg,
        var(--color-bg-tertiary, #151518) 0%,
        var(--color-bg-secondary, #0f0f12) 50%,
        var(--color-bg-tertiary, #151518) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: var(--radius-sm, 4px);
    height: 16px;
}

.skeleton-cell--sm { width: 60px; }
.skeleton-cell--md { width: 120px; }
.skeleton-cell--lg { flex: 1; min-width: 150px; }
.skeleton-cell--badge { width: 80px; height: 24px; border-radius: 12px; }

/* ============================================
   INLINE LOADING (para botões/ações)
   ============================================ */

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

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 18px;
    height: 18px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: loader-spin 0.7s linear infinite;
    opacity: 0.8;
}

.btn-loading.btn-primary::after {
    border-color: var(--color-onyx, #0f0f12);
    border-top-color: transparent;
}

/* ============================================
   UTILITIES
   ============================================ */

.loading-fade-out {
    animation: fade-out 0.3s ease forwards;
}

@keyframes fade-out {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .page-loader__logo {
        width: 64px;
        height: 64px;
    }
    
    .page-loader__x {
        font-size: 36px;
    }
    
    .page-loader__ring {
        width: 56px;
        height: 56px;
    }
    
    .page-loader__progress {
        width: 100px;
    }
}