/* --- Scoped CSS Variables --- */
#qrforge-app {
    --bg-body: transparent;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --border: #e2e8f0;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

#qrforge-app * { box-sizing: border-box; }
#qrforge-app svg { width: 20px; height: 20px; stroke: currentColor; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }

/* Layout */
.qrf-tool-layout { display: grid; grid-template-columns: 1fr 400px; gap: 32px; align-items: start; }
@media (max-width: 900px) { .qrf-tool-layout { grid-template-columns: 1fr; } }

.qrf-panel { background-color: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); }

/* Tabs inside Accordion */
.qrf-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; border-bottom: 1px solid var(--border); padding-bottom: 16px; }
.qrf-tab-btn { background: none; border: none; color: var(--text-muted); font-weight: 500; padding: 8px 16px; border-radius: 20px; cursor: pointer; display: flex; align-items: center; gap: 6px; font-size: 0.9rem; transition: background 0.2s, color 0.2s;}
.qrf-tab-btn:hover { background-color: var(--bg-surface-hover); color: var(--text-main); }
.qrf-tab-btn.active { background-color: var(--primary); color: #fff; }
.qrf-tab-content { display: none; }
.qrf-tab-content.active { display: block; animation: qrfFadeIn 0.3s ease; }
@keyframes qrfFadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

/* Forms */
.qrf-form-group { margin-bottom: 16px; }
.qrf-form-group label { display: block; font-size: 0.875rem; font-weight: 500; margin-bottom: 6px; color: var(--text-main); }
.qrf-form-control { width: 100%; padding: 10px 14px; font-size: 0.9rem; background-color: transparent; color: var(--text-main); border: 1px solid var(--border); border-radius: var(--radius-md); }
.qrf-form-control:focus { outline: none; border-color: var(--primary); }
textarea.qrf-form-control { resize: vertical; min-height: 80px; }
.qrf-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Accordion */
.qrf-accordion { border-top: 1px solid var(--border); }
.qrf-acc-item { border-bottom: 1px solid var(--border); }
.qrf-acc-header { width: 100%; text-align: left; background: none; border: none; padding: 16px 0; font-size: 1rem; font-weight: 600; color: var(--text-main); cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.qrf-acc-header svg.qrf-chevron { transition: transform 0.3s; }
.qrf-acc-header[aria-expanded="true"] svg.qrf-chevron { transform: rotate(180deg); }
.qrf-acc-body { display: none; padding-bottom: 16px; }
.qrf-acc-header[aria-expanded="true"] + .qrf-acc-body { display: block; }

/* Login Prompt & Notices */
.qrf-login-prompt { background: rgba(59, 130, 246, 0.05); border: 1px dashed var(--primary); padding: 16px; border-radius: var(--radius-md); }
.qrf-login-prompt strong { display: block; color: var(--primary); margin-bottom: 4px; }
.qrf-login-prompt p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
.qrf-notice { padding: 16px; background: var(--bg-surface); border-left: 4px solid var(--primary); box-shadow: var(--shadow-sm); }

/* Dashboard Table */
.qrf-dashboard-container { background: var(--bg-surface); padding: 24px; border-radius: var(--radius-lg); border: 1px solid var(--border); }
.qrf-dashboard-table { width: 100%; border-collapse: collapse; text-align: left; }
.qrf-dashboard-table th, .qrf-dashboard-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.qrf-dashboard-table th { background: var(--bg-surface-hover); font-weight: 600; font-size: 0.9rem; }
.qrf-dashboard-table td { font-size: 0.95rem; }

/* Preview Area */
.qrf-preview-sticky { position: sticky; top: 30px; }
.qrf-preview-header { font-weight: 600; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; color: var(--text-main); }
.qrf-qr-wrapper { background-color: var(--bg-surface-hover); border-radius: var(--radius-md); padding: 32px; display: flex; justify-content: center; align-items: center; min-height: 300px; margin-bottom: 24px; overflow: hidden; }
.qrf-qr-frame-container { display: flex; flex-direction: column; align-items: center; background: transparent; position: relative; }
.qrf-qr-canvas-holder { line-height: 0; background: #fff; padding: 8px; border-radius: 4px; }
.qrf-qr-canvas-holder canvas, .qrf-qr-canvas-holder svg { max-width: 100%; height: auto !important; display: block; }

/* Frames */
.qrf-frame-scan-me .qrf-qr-frame-container { border: 4px solid var(--text-main); padding: 16px 16px 48px 16px; border-radius: 12px; background: #fff; }
.qrf-frame-scan-me .qrf-qr-label { position: absolute; bottom: 12px; font-weight: 800; font-size: 1.2rem; color: var(--text-main); letter-spacing: 2px; text-transform: uppercase; }
.qrf-frame-tooltip .qrf-qr-frame-container { background: var(--text-main); padding: 12px 12px 50px 12px; border-radius: 12px; }
.qrf-frame-tooltip .qrf-qr-label { position: absolute; bottom: 14px; font-weight: 600; color: var(--bg-surface); font-size: 1rem; letter-spacing: 1px; }

/* Buttons */
.qrf-btn { display: flex; justify-content: center; align-items: center; gap: 8px; padding: 12px 20px; font-size: 0.95rem; font-weight: 600; border-radius: var(--radius-md); cursor: pointer; border: none; font-family: inherit; transition: all 0.2s;}
.qrf-btn-primary { background-color: var(--primary); color: #fff; }
.qrf-btn-primary:hover { background-color: var(--primary-hover); }
.qrf-btn-outline { background-color: transparent; border: 1px solid var(--border); color: var(--text-main); }
.qrf-btn-outline:hover { background-color: var(--bg-surface-hover); }