:root,
[data-theme="light"] {
    --pf-bg: #ffffff;
    --pf-bg-alt: #f8f9fa;
    --pf-surface: #ffffff;
    --pf-surface-alt: #f1f3f5;
    --pf-text: #1a1a2e;
    --pf-text-muted: #475569;
    --pf-heading: #0f0f1a;
    --pf-border: #e2e6ea;
    --pf-primary: #0d6efd;
    --pf-primary-hover: #0b5ed7;
    --pf-accent: #198754;
    --pf-card-shadow: none;
    --pf-card-hover-shadow: none;
    --pf-radius: 1rem;
    --pf-transition: .3s cubic-bezier(.4, 0, .2, 1);
}

[data-theme="dark"] {
    --pf-bg: #111827;
    --pf-bg-alt: #1f2937;
    --pf-surface: #1f2937;
    --pf-surface-alt: #374151;
    --pf-text: #f3f4f6;
    --pf-text-muted: #9ca3af;
    --pf-heading: #ffffff;
    --pf-border: #374151;
    --pf-primary: #3b82f6;
    --pf-primary-hover: #2563eb;
    --pf-accent: #10b981;
    --pf-card-shadow: none;
    --pf-card-hover-shadow: none;
}

body {
    background: var(--pf-bg);
    color: var(--pf-text);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    transition: background var(--pf-transition), color var(--pf-transition);
}

.preview-container {
    max-width: 860px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}

.pf-card {
    background: var(--pf-surface);
    border: 1px solid var(--pf-border);
    border-radius: var(--pf-radius);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    transition: transform var(--pf-transition), box-shadow var(--pf-transition), background var(--pf-transition), border-color var(--pf-transition);
}

.pf-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--pf-card-hover-shadow);
}

.q-card {
    padding: 3.5rem;
    margin-bottom: 2rem;
    position: relative;
}

.tag-pill {
    background: rgba(59, 130, 246, 0.1);
    color: var(--pf-primary);
    padding: 0.35rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-right: 0.5rem;
    border: 1px solid rgba(59, 130, 246, 0.2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

[data-theme="light"] .tag-pill {
    background: rgba(13, 110, 253, 0.1);
    border-color: rgba(13, 110, 253, 0.2);
}

.ans-header {
    color: var(--pf-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--pf-border);
    padding-bottom: 0.5rem;
}

.social-proof {
    text-align: center;
    padding: 1.5rem 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--pf-border);
}

.social-proof-icons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.sp-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--pf-text);
    font-weight: 500;
}

.sp-item i {
    font-size: 1.2rem;
    color: var(--pf-primary);
}

.conversion-box {
    background: var(--pf-surface);
    padding: 3.5rem 2rem;
    text-align: center;
    border-radius: 20px;
    margin-top: 3rem;
    border: 1px solid var(--pf-border);
    box-shadow: none;
}

[data-theme="dark"] .conversion-box {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-color: rgba(255, 255, 255, 0.05);
}


.blurred-card {
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.blurred-text {
    filter: blur(5px);
    opacity: 0.3;
    user-select: none;
    pointer-events: none;
    transition: filter 0.3s ease;
}

.markdown-body pre {
    background: var(--pf-surface-alt);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    border: 1px solid var(--pf-border);
}

.markdown-body code {
    font-family: monospace;
    font-size: 0.9em;
}

.theme-toggle {
    background: var(--pf-surface-alt);
    border: 1px solid var(--pf-border);
    color: var(--pf-text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all var(--pf-transition);
    padding: 0;
}

.theme-toggle:hover {
    background: var(--pf-primary);
    color: #fff;
    border-color: var(--pf-primary);
}

.blur-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, 
        transparent 0%, 
        rgba(255, 255, 255, 0.2) 20%,
        rgba(255, 255, 255, 0.7) 50%,
        var(--pf-surface) 90%
    );
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 2rem;
    z-index: 5;
}

[data-theme="dark"] .blur-overlay {
    background: linear-gradient(to bottom, 
        transparent 0%, 
        rgba(31, 41, 55, 0.2) 20%,
        rgba(31, 41, 55, 0.7) 50%,
        var(--pf-surface) 90%
    );
}

.btn-pf {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #fff !important;
    border: none;
    padding: 0.75rem 1.8rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: .01em;
    transition: all var(--pf-transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: none !important;
}

.btn-pf:hover {
    transform: translateY(-2px);
    box-shadow: none !important;
    filter: brightness(1.1);
}


.btn-pf-outline {
    background: transparent;
    border: 1px solid var(--pf-primary);
    color: var(--pf-primary) !important;
    padding: 0.75rem 1.8rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    transition: all var(--pf-transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: none !important;
}

.btn-pf-outline:hover {
    background: var(--pf-primary);
    color: #fff !important;
    transform: translateY(-2px);
    box-shadow: none !important;
}


.share-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1.5rem;
    margin-top: 2rem;
    border-top: 1px dashed var(--pf-border);
}

.share-btn {
    background: var(--pf-surface-alt);
    border: 1px solid var(--pf-border);
    color: var(--pf-text-muted);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.2s;
    text-decoration: none;
}

.share-btn:hover {
    background: var(--pf-primary);
    color: #fff;
    border-color: var(--pf-primary);
}

#copyToast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--pf-accent);
    color: white;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: 0.3s;
    opacity: 0;
    z-index: 9999;
}

#copyToast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.4rem;
    color: #fff !important;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

[data-theme="light"] .navbar-brand {
    color: var(--pf-heading) !important;
}

.logo-box {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border-radius: 6px;
}

@media (max-width: 768px) {
    .q-card {
        padding: 2rem 1.5rem;
    }

    .preview-container {
        margin: 1.5rem auto;
    }

    .btn-pf,
    .btn-pf-outline {
        padding: 0.65rem 1.6rem;
        font-size: 0.92rem;
    }
}

/* ── Footer ───────────────────────────────────────── */
footer {
    background: var(--pf-bg-alt);
    border-top: 1px solid var(--pf-border);
    transition: background var(--pf-transition), border-color var(--pf-transition);
    margin-top: 6rem;
}

footer a {
    color: var(--pf-text-muted);
    transition: color var(--pf-transition);
    text-decoration: none;
}

footer a:hover {
    color: var(--pf-heading);
}

.footer-nav a {
    font-size: 0.9rem;
    color: var(--pf-text-muted) !important;
}

.footer-nav a:hover {
    color: var(--pf-heading) !important;
}