#protectForm {
    position: relative;
    background:
        radial-gradient(circle at 18% 22%, rgba(211,47,47,0.10), transparent 46%),
        linear-gradient(135deg, #161B22 0%, #111827 100%);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

#protectForm::before {
    content: '';
    position: absolute;
    inset: -30% 0;
    background: linear-gradient(120deg, rgba(211,47,47,0) 0%, rgba(211,47,47,0.35) 45%, rgba(211,47,47,0) 80%);
    transform: translateX(-60%);
    animation: protectSweep 6s linear infinite;
    opacity: 0.6;
    pointer-events: none;
    z-index: 0;
}

#protectForm > * {
    position: relative;
    z-index: 1;
}

@keyframes protectSweep {
    0% { transform: translateX(-60%); }
    100% { transform: translateX(60%); }
}

@media (prefers-reduced-motion: reduce) {
    #protectForm::before { animation: none; }
}

.pdf-card {
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    padding:25px;
    border-radius:12px;
    border:2px dashed rgba(211,47,47,0.35);
    background:var(--bg-section);
    color:var(--text-muted);
    cursor:pointer;
    transition:transform .2s, background .2s, border-color .2s;
}
.pdf-card:hover { transform:translateY(-1px); border-color:var(--accent); background:var(--bg-elevated); }
.pdf-card.dragover { border-color:var(--accent); background:var(--bg-elevated); color:var(--text-primary); }

.thumb-card { background:var(--bg-elevated); border-radius:12px; box-shadow:var(--shadow-soft); padding:10px; display:flex; flex-direction:column; align-items:center; border:1px solid var(--border); }

.page-count { background:linear-gradient(135deg,var(--accent),var(--accent-hover)); color:#fff; padding:3px 8px; border-radius:8px; margin-top:6px; font-size:0.85rem; display:block; }

.remove-file-btn { background:linear-gradient(135deg,var(--error),#8e1e1e); color:#fff; padding:6px 12px; border:none; border-radius:6px; margin-top:10px; font-size:0.85rem; cursor:pointer; transition:0.2s; }
.remove-file-btn:hover { background:linear-gradient(135deg,#8e1e1e,#721414); transform:translateY(-1px); }

.merge-btn { background:linear-gradient(135deg,var(--accent),var(--accent-hover)); color:#fff; padding:12px 25px; border:1px solid rgba(255,255,255,0.08); border-radius:12px; font-size:1.1rem; cursor:pointer; transition:0.2s; }
.merge-btn:hover { transform:translateY(-2px); box-shadow:0 10px 24px rgba(211,47,47,0.35); }
.protect-submit { margin-top:20px; }
.protect-actions {
    display: flex;
    flex-wrap: nowrap;
    gap: 12px;
    align-items: center;
    justify-content: center;
    margin-top: 20px;
}
.protect-actions .protect-submit { margin-top: 0; }
.protect-actions .btn-share {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    padding: 0;
    border-radius: 10px;
    overflow: hidden;
    line-height: 0;
    gap: 0;
    margin-top: 0;
}
.protect-actions .btn-share svg {
    width: 18px;
    height: 18px;
    display: block;
    flex-shrink: 0;
}
.btn-share::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translate(-50%, -4px);
    background: rgba(22, 27, 34, 0.96);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 6px 10px;
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    box-shadow: 0 10px 24px rgba(0,0,0,0.35);
    z-index: 20;
}
.btn-share:hover::after {
    opacity: 1;
    transform: translate(-50%, 0);
}

.protect-input-group { margin-top:15px; }
.protect-input {
    padding:10px;
    width:100%;
    border-radius:8px;
    border:1px solid var(--border);
    background:var(--bg-elevated);
    color:var(--text-primary);
}
.protect-input::placeholder { color:var(--text-muted); }
.helper-text { font-size:12px; color:var(--text-muted); margin-top:5px; }
.error-text { color:var(--error); margin-top:10px; }

.permissions-box {
    margin-top:15px;
    background:var(--bg-section);
    padding:15px;
    border-radius:8px;
    border:1px solid var(--border);
    color:var(--text-primary);
}
.permissions-box h4 { margin:0 0 10px 0; color:var(--text-heading); }
.permission-item { display:block; margin:8px 0; cursor:pointer; color:var(--text-primary); }

.share-modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 20, 25, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 9999;
    backdrop-filter: blur(6px);
}
.share-modal[hidden] { display: none; }
.share-dialog {
    background: linear-gradient(135deg, #161B22 0%, #111827 100%);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px 26px;
    width: min(460px, 92vw);
    box-shadow: 0 24px 60px rgba(0,0,0,0.55);
    color: var(--text-primary);
    position: relative;
}
.share-dialog h3 {
    margin: 0 0 8px 0;
    color: var(--text-heading);
    font-size: 1.25rem;
}
.share-subtext {
    color: var(--text-muted);
    margin: 0 0 18px 0;
}
.share-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: center;
}
.share-copy {
    width: 42px;
    height: 42px;
}
.share-icon-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-primary);
    text-decoration: none;
    position: relative;
    padding: 0;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}
.share-icon-btn svg {
    width: 20px;
    height: 20px;
}
.share-icon-btn:hover {
    color: #fff;
    border-color: rgba(211,47,47,0.5);
    box-shadow: 0 10px 24px rgba(211,47,47,0.2);
    transform: translateY(-2px);
}
.share-icon-btn.is-copied::after {
    content: 'Copied';
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translate(-50%, -4px);
    background: rgba(22, 27, 34, 0.96);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 6px 8px;
    font-size: 0.8rem;
    opacity: 1;
    white-space: nowrap;
    box-shadow: 0 10px 24px rgba(0,0,0,0.35);
    pointer-events: none;
}
.share-bmc-wrap {
    margin-top: 20px;
    display: flex;
    justify-content: center;
}
.share-bmc {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 22px;
    border-radius: 999px;
    background: linear-gradient(135deg, #D32F2F 0%, #B71C1C 100%);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    box-shadow: 0 14px 32px rgba(211,47,47,0.4);
    overflow: hidden;
}
.share-bmc::before {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 999px;
    border: 1px solid rgba(211,47,47,0.45);
    opacity: 0;
    animation: sharePulse 2.8s ease-out infinite;
}
.share-note {
    margin-top: 18px;
    padding: 12px 14px;
    background: rgba(31, 41, 55, 0.7);
    border-radius: 12px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}
.share-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
}
.share-close:hover {
    background: var(--bg-card);
}
@keyframes sharePulse {
    0% { transform: scale(0.95); opacity: 0; }
    15% { opacity: 0.8; }
    100% { transform: scale(1.25); opacity: 0; }
}

.pdf-loading {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 20, 25, 0.82);
    z-index: 9999;
    backdrop-filter: blur(4px);
}
.pdf-loading[hidden] { display: none; }
.pdf-loading-inner {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.95), rgba(17, 24, 39, 0.95));
    border: 1px solid rgba(211, 47, 47, 0.35);
    border-radius: 999px;
    padding: 12px 18px;
    color: var(--text-primary);
    box-shadow: 0 18px 40px rgba(0,0,0,0.55), 0 0 28px rgba(211,47,47,0.25);
}
.pdf-spinner {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 3px solid rgba(211,47,47,0.25);
    border-top-color: var(--accent);
    box-shadow: 0 0 12px rgba(211,47,47,0.55);
    animation: pdfSpinner 0.9s linear infinite;
}
.pdf-loading-text {
    font-size: 0.98rem;
    color: var(--text-primary);
    letter-spacing: 0.01em;
}
@keyframes pdfSpinner {
    to { transform: rotate(360deg); }
}

/* Content Section Styles */
.content-section { background:var(--bg-card); padding:40px; border-radius:16px; margin:30px 0; box-shadow:var(--shadow-soft); border:1px solid var(--border); }
.content-section h2 { color:var(--text-heading); margin-bottom:20px; font-size:1.8rem; }
.content-section p { color:var(--text-muted); line-height:1.8; margin-bottom:15px; }

.steps-guide { display:flex; flex-direction:column; gap:20px; margin:25px 0; }
.step-item { display:flex; gap:20px; align-items:flex-start; }
.step-num { background:linear-gradient(135deg,var(--accent),var(--accent-hover)); color:#fff; width:40px; height:40px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-weight:700; flex-shrink:0; }
.step-content h3 { color:var(--text-heading); margin-bottom:8px; }
.step-content p { color:var(--text-muted); margin:0; }

.features-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:25px; margin:25px 0; }
.feature-card { background:var(--bg-section); padding:25px; border-radius:12px; border:1px solid var(--border); }
.feature-card h3 { color:var(--text-heading); margin-bottom:10px; font-size:1.1rem; }
.feature-card p { color:var(--text-muted); margin:0; font-size:0.95rem; }

.use-cases-list { display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:15px; margin:25px 0; }
.use-case-item { background:var(--bg-section); padding:15px 20px; border-radius:8px; color:var(--text-primary); font-weight:500; border:1px solid var(--border); }

.tips-container { display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:20px; margin:25px 0; }
.tip-box { background:var(--bg-section); padding:20px; border-radius:12px; border:1px solid var(--border); }
.tip-box h4 { color:var(--text-heading); margin-bottom:10px; }
.tip-box p { color:var(--text-muted); margin:0; font-size:0.95rem; }

.faq-container { margin:25px 0; }
.faq-item { background:var(--bg-section); padding:20px; border-radius:12px; margin-bottom:15px; border:1px solid var(--border); }
.faq-item h3 { color:var(--text-heading); margin-bottom:10px; font-size:1.1rem; }
.faq-item p { color:var(--text-muted); margin:0; }
.faq-item a { color:var(--text-primary); text-decoration:underline; }
.faq-item a:hover { color:var(--accent); }

.cta-section { background:linear-gradient(135deg,var(--accent),var(--accent-hover)); color:#fff; padding:40px; border-radius:16px; text-align:center; margin:30px 0; }
.cta-section h2 { margin-bottom:15px; }
.cta-section p { opacity:0.9; margin-bottom:20px; }
.cta-btn { background:#fff; color:var(--accent); padding:12px 30px; border-radius:25px; text-decoration:none; font-weight:600; display:inline-block; }

.related-tools { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:15px; margin:25px 0; }
.related-tool-link { background:var(--bg-section); padding:15px; border-radius:8px; text-decoration:none; color:var(--text-primary); text-align:center; transition:all 0.3s; border:1px solid var(--border); }
.related-tool-link:hover { background:var(--bg-elevated); color:var(--text-heading); transform:translateY(-3px); border-color:var(--accent); }

@media(max-width:768px) {
    .content-section { padding:25px; }
    .step-item { flex-direction:column; gap:10px; }
    .features-grid, .tips-container { grid-template-columns:1fr; }
}

@media (max-width: 600px) {
    .btn-share::after {
        white-space: normal;
        width: 200px;
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .share-bmc::before { animation: none; }
    .pdf-spinner { animation: none; }
}