/* ══════════════════════════════════════════════════════════════
   PATTERN — Loading overlay
   Full-screen overlay with spinner and optional step-by-step progress.
   Use for long-running async operations (analysis, upload, processing).

   Markup:
     <div class="loading-overlay" data-state="hidden">
       <div class="spinner" aria-hidden="true"></div>
       <p class="loading-text">Analyserar dokument...</p>
       <ol class="loading-steps">
         <li class="loading-step">Extraherar text</li>
         <li class="loading-step loading-step--visible">Analyserar riktning</li>
         <li class="loading-step">Beräknar scores</li>
       </ol>
       <p class="loading-elapsed">0:12</p>
     </div>

   Show/hide via JS: toggle .loading-overlay--visible or set
   data-state="visible". See shared/js/loading-overlay.js.
   ══════════════════════════════════════════════════════════════ */

.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.92);
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.loading-overlay--visible,
.loading-overlay[data-state="visible"] {
    display: flex;
}

.loading-text {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--white);
    margin-top: var(--s-6);
    margin-bottom: var(--s-4);
}

.spinner {
    width: 2.5rem;
    height: 2.5rem;
    border: 3px solid rgba(255, 255, 255, 0.15);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-steps {
    list-style: none;
    padding: 0;
    text-align: left;
}

.loading-step {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.3);
    padding: var(--s-1) 0;
    transition: color 0.3s;
}

.loading-step--visible,
.loading-step[data-state="visible"] {
    color: rgba(255, 255, 255, 0.9);
}

.loading-elapsed {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
    margin-top: var(--s-4);
}