/* --- SPACER FIX (Forces tool below absolute navbar) --- */
.sfren-spacer {
    display: block;
    width: 100%;
    /* Increase this value if your navbar is taller */
    height: 150px; 
    background: transparent;
}

@media (max-width: 768px) {
    .sfren-spacer {
        height: 100px; 
    }
}

/* --- ISOLATED CSS VARIABLES (ZYNITI DARK THEME) --- */
.sfren-wrapper {
    /* --- COLORS --- */
    --sfren-bg-app: #0a0a0a;
    --sfren-bg-panel: #111111;
    --sfren-bg-input: #1a1a1a;
    --sfren-primary: #3b82f6;
    --sfren-primary-hover: #2563eb;
    --sfren-accent: #8b5cf6;
    --sfren-glow: rgba(59, 130, 246, 0.5);
    --sfren-text-main: #ffffff;
    --sfren-text-muted: #9ca3af;
    --sfren-border: #333333;
    --sfren-success: #10b981;
    --sfren-error: #ef4444;
    --sfren-radius: 12px;
    --sfren-font: 'Inter', 'Segoe UI', sans-serif;

    /* --- LAYOUT --- */
    font-family: var(--sfren-font);
    color: var(--sfren-text-main);
    background: var(--sfren-bg-app);
    
    box-sizing: border-box;
    width: 95%;
    max-width: 1300px;
    
    /* MARGIN RESET: Spacer handles the top, we just ensure bottom spacing */
    margin: 0 auto 50px auto; 
    
    border-radius: var(--sfren-radius);
    overflow: hidden;
    position: relative;
    z-index: 1;
    
    border: 1px solid var(--sfren-border);
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}


.sfren-wrapper *, .sfren-wrapper *::before, .sfren-wrapper *::after {
    box-sizing: inherit;
}

/* --- LAYOUT GRID --- */
.sfren-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    min-height: 600px;
    background: var(--sfren-bg-panel);
}

/* --- INTERNAL HEADER --- */
.sfren-header {
    background: #0f0f0f; 
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--sfren-border);
}

.sfren-brand { display: flex; align-items: center; gap: 15px; }

/* Logo Icon with Gradient */
.sfren-logo-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--sfren-primary), var(--sfren-accent));
    color: white; border-radius: 8px;
    display: grid; place-items: center; font-size: 1.4rem;
    box-shadow: 0 0 10px var(--sfren-glow);
}

.sfren-brand h1 { margin: 0; font-size: 1.2rem; font-weight: 700; color: white; }
.sfren-brand p { margin: 0; font-size: 0.8rem; color: var(--sfren-text-muted); }

.sfren-help-btn {
    background: transparent; 
    border: 1px solid var(--sfren-border);
    padding: 6px 15px; border-radius: 20px; cursor: pointer;
    font-size: 0.85rem; color: var(--sfren-text-muted); transition: 0.2s;
}
.sfren-help-btn:hover { 
    border-color: var(--sfren-primary); 
    color: var(--sfren-primary); 
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.2);
}

.sfren-help-overlay {
    background: #1e1e2e; color: #fff;
    padding: 15px 30px; font-size: 0.9rem;
    display: none; border-bottom: 1px solid var(--sfren-border);
}
.sfren-help-overlay.active { display: block; }
.sfren-help-overlay strong { color: var(--sfren-primary); }

/* --- SIDEBAR --- */
.sfren-sidebar {
    background: #0a0a0a;
    padding: 25px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    border-right: 1px solid var(--sfren-border);
}

/* Upload Zone - Dark Theme */
.sfren-upload-card {
    background: #141414; 
    border: 2px dashed #333;
    border-radius: var(--sfren-radius);
    padding: 30px 20px;
    text-align: center; cursor: pointer;
    transition: all 0.3s ease;
}
.sfren-upload-card:hover, .sfren-upload-card.drag-over {
    border-color: var(--sfren-primary);
    background: rgba(59, 130, 246, 0.05);
    transform: translateY(-2px);
}
.sfren-upload-icon { font-size: 2.5rem; margin-bottom: 10px; opacity: 0.8; filter: grayscale(1); transition:0.3s; }
.sfren-upload-card:hover .sfren-upload-icon { filter: grayscale(0); transform: scale(1.1); }
.sfren-upload-card h3 { margin: 0 0 5px 0; font-size: 1rem; color: white; }
.sfren-upload-card p { margin: 0; font-size: 0.8rem; color: var(--sfren-text-muted); }

/* Rules Panel */
.sfren-rules-card {
    flex: 1; display: flex; flex-direction: column; gap: 15px;
}
.sfren-card-header h3 { margin: 0; font-size: 1rem; color: var(--sfren-primary); text-transform: uppercase; letter-spacing: 1px; font-size: 0.8rem; }

.sfren-form-group label {
    display: block; font-size: 0.75rem; font-weight: 600;
    margin-bottom: 8px; color: var(--sfren-text-muted); text-transform: uppercase; letter-spacing: 0.5px;
}

/* Inputs & Selects - Dark Mode */
.sfren-input, .sfren-select {
    width: 100%; padding: 12px 15px;
    border: 1px solid #333; 
    border-radius: 8px;
    font-size: 0.9rem; outline: none; 
    background: var(--sfren-bg-input);
    color: white;
    transition: 0.2s;
}
.sfren-input::placeholder { color: #555; }
.sfren-input:focus, .sfren-select:focus {
    border-color: var(--sfren-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
    background: #222;
}

.sfren-row { display: flex; gap: 10px; }

/* Dynamic Rules */
.sfren-rule-group { display: none; flex-direction: column; gap: 10px; animation: sfren-fade 0.3s ease; }
.sfren-rule-group.active { display: flex; }
@keyframes sfren-fade { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }

.sfren-radio-grid { display: flex; flex-direction: column; gap: 10px; }
.sfren-radio-grid label { font-size: 0.9rem; display: flex; align-items: center; gap: 10px; cursor: pointer; color: #ccc; }
.sfren-radio-grid input[type="radio"] { accent-color: var(--sfren-primary); }

/* Status Box */
.sfren-status-box {
    margin-top: auto; padding: 12px;
    background: #1a1a1a; border-radius: 8px;
    font-size: 0.8rem; text-align: center; color: var(--sfren-text-muted);
    border: 1px solid #333;
}
.sfren-status-box.error { background: rgba(239, 68, 68, 0.1); color: #ef4444; border-color: #ef4444; }
.sfren-status-box.success { background: rgba(16, 185, 129, 0.1); color: #10b981; border-color: #10b981; }

/* --- MAIN PREVIEW AREA --- */
.sfren-main {
    background: var(--sfren-bg-panel);
    padding: 0;
    display: flex; flex-direction: column;
    height: 100%;
    position: relative;
}

.sfren-preview-card {
    height: 100%; display: flex; flex-direction: column;
}

.sfren-preview-header {
    padding: 20px 30px;
    border-bottom: 1px solid var(--sfren-border);
    display: flex; justify-content: space-between; align-items: center;
    background: rgba(255,255,255,0.02);
}
.sfren-preview-header h3 { margin: 0; color: white; }
.sfren-count-badge {
    background: #333; color: white; padding: 4px 12px;
    border-radius: 12px; font-size: 0.75rem; font-weight: 600;
    border: 1px solid #444;
}

/* Table - Dark Mode */
.sfren-table-wrapper {
    flex: 1; overflow-y: auto; padding: 0;
}
/* Custom Scrollbar for Dark Mode */
.sfren-table-wrapper::-webkit-scrollbar { width: 8px; }
.sfren-table-wrapper::-webkit-scrollbar-track { background: #111; }
.sfren-table-wrapper::-webkit-scrollbar-thumb { background: #333; border-radius: 4px; }
.sfren-table-wrapper::-webkit-scrollbar-thumb:hover { background: #555; }

.sfren-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.sfren-table th {
    text-align: left; padding: 15px 30px;
    background: #0f0f0f; color: var(--sfren-text-muted);
    font-size: 0.7rem; text-transform: uppercase; font-weight: 700; letter-spacing: 1px;
    position: sticky; top: 0; z-index: 10;
    border-bottom: 1px solid var(--sfren-border);
}
.sfren-table td {
    padding: 12px 30px; border-bottom: 1px solid #1f1f1f;
    font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    color: #ddd;
}
.sfren-table tr:hover td { background: #1a1a1a; }
.sfren-table td:nth-child(3) { color: var(--sfren-primary); font-weight: 500; text-shadow: 0 0 10px rgba(59, 130, 246, 0.3); }
.sfren-table td:nth-child(2) { color: #444; font-size: 1.2rem; }

/* Empty State */
.sfren-empty-row td { padding: 100px 0; text-align: center; color: #444; }

/* Footer Action */
.sfren-action-footer {
    padding: 20px 30px;
    border-top: 1px solid var(--sfren-border);
    background: #0f0f0f;
    display: flex; flex-direction: column; gap: 15px;
}

/* Gradient Button - Zyniti Style */
.sfren-btn-primary {
    background: linear-gradient(90deg, var(--sfren-primary), var(--sfren-accent));
    color: white; border: none;
    width: 100%; padding: 16px;
    border-radius: 8px; font-size: 1rem; font-weight: 600;
    cursor: pointer; display: flex; justify-content: center; align-items: center; gap: 10px;
    transition: transform 0.2s, box-shadow 0.2s;
    text-transform: uppercase; letter-spacing: 1px;
}
.sfren-btn-primary:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4); /* Purple glow */
}
.sfren-btn-primary:active { transform: translateY(1px); }

/* Progress Bar */
.sfren-progress-wrapper {
    height: 6px; background: #222; border-radius: 3px; overflow: hidden; display: none;
}
.sfren-progress-bar { 
    height: 100%; 
    background: linear-gradient(90deg, var(--sfren-primary), var(--sfren-success)); 
    width: 0%; transition: width 0.3s; 
}

/* Disabled State */
.disabled { opacity: 0.3; pointer-events: none; filter: grayscale(0.8); }

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .sfren-grid { grid-template-columns: 1fr; }
    .sfren-sidebar { border-right: none; border-bottom: 1px solid var(--sfren-border); }
    .sfren-table th:nth-child(2), .sfren-table th:nth-child(4),
    .sfren-table td:nth-child(2), .sfren-table td:nth-child(4) { display: none; }
}