/* ============================================================
   LOADING SYSTEM — Professional loading for SIAKAD
   Inspired by GitHub, Vercel, Linear, Notion, Google Workspace
   ============================================================ */

/* ============================================================
   1. PROGRESS BAR — Thin top bar (YouTube/GitHub style)
   ============================================================ */

#loading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 999999;
    background: transparent;
    pointer-events: none;
    visibility: hidden;
    opacity: 0;
    transition: opacity .2s;
}

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

#loading-progress .bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #16a34a, #22c55e, #16a34a);
    background-size: 200% 100%;
    border-radius: 0 2px 2px 0;
    transition: width .4s cubic-bezier(.4,0,.2,1);
    animation: progressGlow 1.5s ease-in-out infinite;
}

@keyframes progressGlow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

html.dark-mode #loading-progress .bar {
    background: linear-gradient(90deg, #22c55e, #4ade80, #22c55e);
    background-size: 200% 100%;
}

/* ============================================================
   2. FULL SCREEN LOADER — Page transitions
   ============================================================ */

.loading-fullscreen {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .35s ease, visibility .35s;
}

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

html.dark-mode .loading-fullscreen {
    background: rgba(15,23,42,.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.loading-fullscreen .loader-inner {
    text-align: center;
    transform: translateY(10px);
    transition: transform .4s ease;
}

.loading-fullscreen.active .loader-inner {
    transform: translateY(0);
}

.loading-fullscreen .loader-spinner {
    width: 48px;
    height: 48px;
    margin: 0 auto 18px;
    border-radius: 50%;
    border: 3px solid #e2e8f0;
    border-top-color: #2158E1;
    animation: spinnerRotate .8s linear infinite;
}

html.dark-mode .loading-fullscreen .loader-spinner {
    border-color: #334155;
    border-top-color: #2158E1;
}

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

.loading-fullscreen .loader-text {
    font-size: 15px;
    font-weight: 500;
    color: #475569;
    margin: 0;
    letter-spacing: .3px;
}

html.dark-mode .loading-fullscreen .loader-text {
    color: #0E8190;
}

.loading-fullscreen .loader-dots {
    display: inline-flex;
    gap: 4px;
    margin-top: 12px;
}

.loading-fullscreen .loader-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #2158E1;
    animation: dotBounce 1.2s ease-in-out infinite;
}

.loading-fullscreen .loader-dots span:nth-child(2) { animation-delay: .2s; }
.loading-fullscreen .loader-dots span:nth-child(3) { animation-delay: .4s; }

html.dark-mode .loading-fullscreen .loader-dots span {
    background: #2158E1;
}

@keyframes dotBounce {
    0%, 80%, 100% { transform: scale(.6); opacity: .4; }
    40% { transform: scale(1); opacity: 1; }
}

/* ============================================================
   3. SKELETON LOADING — Shimmer placeholders
   ============================================================ */

.skeleton-wrapper {
    position: relative;
}

.skeleton {
    background: #e2e8f0;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

html.dark-mode .skeleton {
    background: #1e293b;
}

.skeleton::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255,255,255,.4) 50%,
        transparent 100%);
    animation: shimmer 1.5s ease-in-out infinite;
}

html.dark-mode .skeleton::after {
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255,255,255,.06) 50%,
        transparent 100%);
}

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

.skeleton-line {
    height: 14px;
    margin-bottom: 10px;
    border-radius: 6px;
}

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

.skeleton-line.w-75 { width: 75%; }
.skeleton-line.w-50 { width: 50%; }
.skeleton-line.w-40 { width: 40%; }
.skeleton-line.w-25 { width: 25%; }

.skeleton-card {
    height: 120px;
    border-radius: 16px;
    margin-bottom: 16px;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
}

.skeleton-thumbnail {
    width: 100%;
    height: 180px;
    border-radius: 12px;
    margin-bottom: 12px;
}

.skeleton-table-row {
    display: flex;
    gap: 12px;
    padding: 12px 14px;
    border-bottom: 1px solid #f1f5f9;
}

html.dark-mode .skeleton-table-row {
    border-bottom-color: #1e293b;
}

.skeleton-table-row .skeleton {
    height: 16px;
    border-radius: 4px;
}

.skeleton-table-row .skeleton-cell-1 { width: 40px; flex-shrink: 0; }
.skeleton-table-row .skeleton-cell-2 { width: 100px; flex-shrink: 0; }
.skeleton-table-row .skeleton-cell-3 { width: 180px; flex: 1; }
.skeleton-table-row .skeleton-cell-4 { width: 120px; flex-shrink: 0; }
.skeleton-table-row .skeleton-cell-5 { width: 80px; flex-shrink: 0; }
.skeleton-table-row .skeleton-cell-6 { width: 80px; flex-shrink: 0; }

/* ============================================================
   4. BUTTON LOADING STATE
   ============================================================ */

.btn-loading {
    position: relative;
    pointer-events: none !important;
    opacity: .8;
}

.btn-loading .btn-text {
    visibility: hidden;
}

.btn-loading .btn-loader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 500;
    font-size: inherit;
    color: inherit;
}

.btn-loading .btn-loader .spinner {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid currentColor;
    border-top-color: transparent;
    animation: spinnerRotate .6s linear infinite;
}

.btn-loading.btn-sm .btn-loader .spinner {
    width: 12px;
    height: 12px;
    border-width: 1.5px;
}

/* ============================================================
   5. DATATABLE LOADING OVERLAY
   ============================================================ */

.dt-loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,.7);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s;
    border-radius: 12px;
}

html.dark-mode .dt-loading-overlay {
    background: rgba(15,23,42,.7);
}

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

.dt-loading-overlay .dt-spinner {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #fff;
    padding: 10px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,.08);
    font-size: 13px;
    color: #64748b;
    font-weight: 500;
}

html.dark-mode .dt-loading-overlay .dt-spinner {
    background: #1e293b;
    color: #cbd5e1;
    box-shadow: 0 4px 20px rgba(0,0,0,.2);
}

.dt-loading-overlay .dt-spinner .mini-spinner {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid #e2e8f0;
    border-top-color: #16a34a;
    animation: spinnerRotate .6s linear infinite;
    flex-shrink: 0;
}

html.dark-mode .dt-loading-overlay .dt-spinner .mini-spinner {
    border-color: #334155;
    border-top-color: #22c55e;
}

/* DataTables processing element override */
.dataTables_processing {
    display: none !important;
}

.table-card {
    position: relative;
}

/* ============================================================
   6. LOGIN LOADING
   ============================================================ */

.login-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
}

.login-loading .login-logo {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    animation: loginPulse 2s ease-in-out infinite;
}

@keyframes loginPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: .8; }
}

.login-loading .login-verify-text {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 8px;
}

html.dark-mode .login-loading .login-verify-text {
    color: #f1f5f9;
}

.login-loading .login-sub-text {
    font-size: 13px;
    color: #94a3b8;
    margin-bottom: 20px;
}

.login-loading .login-progress {
    width: 200px;
    height: 3px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}

html.dark-mode .login-loading .login-progress {
    background: #334155;
}

.login-loading .login-progress .login-progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #16a34a, #22c55e);
    border-radius: 4px;
    animation: loginProgress 2s ease-in-out infinite;
}

@keyframes loginProgress {
    0% { width: 0; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* ============================================================
   7. LOGOUT LOADING
   ============================================================ */

.logout-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
}

.logout-loading .logout-icon {
    font-size: 48px;
    color: #16a34a;
    margin-bottom: 16px;
    animation: logoutFloat 1.5s ease-in-out infinite;
}

html.dark-mode .logout-loading .logout-icon {
    color: #22c55e;
}

@keyframes logoutFloat {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(-8px); opacity: .7; }
}

.logout-loading .logout-text {
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 4px;
}

html.dark-mode .logout-loading .logout-text {
    color: #f1f5f9;
}

.logout-loading .logout-sub {
    font-size: 13px;
    color: #94a3b8;
}

.logout-loading .logout-dots {
    display: flex;
    gap: 6px;
    margin-top: 16px;
}

.logout-loading .logout-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #16a34a;
    animation: logoutDots 1.2s ease-in-out infinite;
}

html.dark-mode .logout-loading .logout-dots span {
    background: #22c55e;
}

.logout-loading .logout-dots span:nth-child(2) { animation-delay: .2s; }
.logout-loading .logout-dots span:nth-child(3) { animation-delay: .4s; }

@keyframes logoutDots {
    0%, 80%, 100% { transform: scale(.6); opacity: .3; }
    40% { transform: scale(1); opacity: 1; }
}

/* ============================================================
   8. IMPORT / EXPORT LOADING
   ============================================================ */

.import-loading,
.export-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    text-align: center;
}

.import-loading .import-icon,
.export-loading .export-icon {
    font-size: 40px;
    margin-bottom: 14px;
    animation: importSpin 1.2s ease-in-out infinite;
}

.import-loading .import-icon { color: #16a34a; }
.export-loading .export-icon { color: #0ea5e9; }

html.dark-mode .import-loading .import-icon { color: #22c55e; }
html.dark-mode .export-loading .export-icon { color: #38bdf8; }

@keyframes importSpin {
    0% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(10deg) scale(1.1); }
    100% { transform: rotate(0deg) scale(1); }
}

.import-loading .import-text,
.export-loading .export-text {
    font-size: 15px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 6px;
}

html.dark-mode .import-loading .import-text,
html.dark-mode .export-loading .export-text {
    color: #f1f5f9;
}

.import-loading .import-sub,
.export-loading .export-sub {
    font-size: 13px;
    color: #94a3b8;
}

/* ============================================================
   9. RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
    .loading-fullscreen .loader-spinner {
        width: 40px;
        height: 40px;
    }

    .loading-fullscreen .loader-text {
        font-size: 14px;
    }

    .login-loading .login-logo {
        width: 60px;
        height: 60px;
    }

    .skeleton-table-row {
        padding: 10px 8px;
        gap: 8px;
    }

    .skeleton-table-row .skeleton-cell-2 { width: 60px; }
    .skeleton-table-row .skeleton-cell-3 { width: 100px; flex: 1; }
    .skeleton-table-row .skeleton-cell-4 { width: 60px; display: none; }
}