/**
 * Overlay CSS - Estilos unificados para todos os overlays do sistema
 *
 * Substitui CSS inline duplicado em:
 * - BOApp.js (_showLoading, _showWarning)
 * - SectionContainer.js (_showGeneratingTextOverlay)
 *
 * v0.13.2+: Centralizado para manutenibilidade
 */

/* ============================================================================
   KEYFRAMES
   ============================================================================ */

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

@keyframes overlay-fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes overlay-slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================================================
   BASE OVERLAY (backdrop + centering)
   ============================================================================ */

.ui-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: overlay-fadeIn 0.2s ease;
}

.ui-overlay--hidden {
    display: none;
}

.ui-overlay--closing {
    animation: overlay-fadeOut 0.2s ease forwards;
}

/* ============================================================================
   CONTENT BOX (white card)
   ============================================================================ */

.ui-overlay__content {
    background: white;
    padding: 24px 32px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    animation: overlay-slideIn 0.3s ease;
}

/* Variante: conteúdo vertical (para mensagens longas) */
.ui-overlay__content--vertical {
    flex-direction: column;
    text-align: center;
    gap: 12px;
}

/* ============================================================================
   SPINNER
   ============================================================================ */

.ui-overlay__spinner {
    width: 24px;
    height: 24px;
    border: 3px solid #e5e7eb;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: overlay-spin 1s linear infinite;
    flex-shrink: 0;
}

/* Spinner grande (para overlays principais) */
.ui-overlay__spinner--large {
    width: 32px;
    height: 32px;
    border-width: 4px;
}

/* ============================================================================
   MESSAGE TEXT
   ============================================================================ */

.ui-overlay__message {
    font-size: 16px;
    color: #374151;
    font-weight: 500;
    line-height: 1.5;
}

.ui-overlay__message--small {
    font-size: 14px;
}

/* ============================================================================
   TOAST NOTIFICATIONS
   ============================================================================ */

.ui-toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1001;
    animation: overlay-slideIn 0.3s ease;
    max-width: 400px;
}

.ui-toast--warning {
    background: #fef3c7;
    color: #92400e;
}

.ui-toast--error {
    background: #fee2e2;
    color: #991b1b;
}

.ui-toast--success {
    background: #d1fae5;
    color: #065f46;
}

.ui-toast--info {
    background: #dbeafe;
    color: #1e40af;
}

.ui-toast--closing {
    animation: overlay-fadeOut 0.3s ease forwards;
}

/* ============================================================================
   OVERLAY TYPES (semantic aliases)
   ============================================================================ */

/* Loading overlay (app-wide) */
.ui-overlay--loading .ui-overlay__content {
    min-width: 200px;
}

/* Generating text overlay (section-specific) */
.ui-overlay--generating .ui-overlay__content {
    min-width: 280px;
}

.ui-overlay--generating .ui-overlay__message {
    text-align: left;
}

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

/* ============================================================================
   EDITOR LOADING (shown during lazy-load + definition fetch)
   ============================================================================ */

.editor-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 60px 20px;
    animation: overlay-fadeIn 0.2s ease;
}

@media (max-width: 480px) {
    .ui-overlay__content {
        margin: 16px;
        padding: 20px 24px;
    }

    .ui-toast {
        left: 16px;
        right: 16px;
        bottom: 16px;
    }
}