.merge-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
    align-items: end;
    margin-top: 26px;
    padding: 30px;
    text-align: left;
}

.merge-hero h1 {
    margin: 0 0 10px;
    font-size: 2.7rem;
    line-height: 1.1;
    letter-spacing: 0;
}

.merge-hero p {
    max-width: 760px;
}

.tool-kicker {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0;
}

.tool-status-badges {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
    max-width: 420px;
}

.tool-status-badges span {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 8px 11px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(22,27,34,0.82);
    color: var(--text-primary);
    font-size: 0.82rem;
    font-weight: 700;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.upload-section {
    margin-top: 22px;
    background:
        radial-gradient(110% 90% at 0% 0%, rgba(211,47,47,0.08), transparent 42%),
        var(--bg-card);
    padding: 28px;
    border-radius: 16px;
    box-shadow: 0 18px 44px rgba(0,0,0,0.45);
    text-align: center;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.merge-workspace {
    text-align: left;
}

.workspace-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 22px;
    align-items: start;
    margin-bottom: 18px;
}

.workspace-header h2 {
    color: var(--text-heading);
    font-size: 1.55rem;
    margin: 0 0 6px;
    letter-spacing: 0;
}

.workspace-header p:not(.tool-kicker) {
    color: var(--text-muted);
    margin: 0;
    max-width: 660px;
}

.workspace-mini-steps {
    display: grid;
    grid-template-columns: repeat(2, minmax(120px, 1fr));
    gap: 8px;
    min-width: 280px;
}

.workspace-mini-steps span {
    color: var(--text-primary);
    background: var(--bg-section);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 9px 10px;
    font-size: 0.84rem;
    font-weight: 700;
    text-align: center;
}
.file-label { cursor:pointer; display:inline-block; margin-bottom:15px; }
.file-label input[type="file"] { display:none; }
.file-button { background: linear-gradient(135deg,var(--accent),var(--accent-hover)); color:#fff; padding:10px 20px; border-radius:12px; font-weight:500; box-shadow:0 10px 26px rgba(211,47,47,0.28); }
.file-button:hover { background: linear-gradient(135deg,var(--accent-hover),var(--accent)); transform: translateY(-2px); }

.drop-zone {
    border: 2px dashed rgba(211,47,47,0.35);
    border-radius: 14px;
    padding: 20px;
    margin: 12px 0 18px;
    color: var(--text-muted);
    background: var(--bg-section);
    transition: border-color 0.2s ease, background 0.2s ease;
    cursor: pointer;
    text-align: center;
}
.drop-zone.dragover {
    border-color: var(--accent);
    background: var(--bg-elevated);
    color: var(--text-primary);
}
.btn { display:inline-block; background: linear-gradient(135deg,var(--accent),var(--accent-hover)); color:#fff; padding:12px 25px; border-radius:12px; font-weight:500; margin-top:20px; transition: all 0.3s ease; border:1px solid rgba(255,255,255,0.08); box-shadow:0 10px 24px rgba(211,47,47,0.25); }
.btn:hover { transform: translateY(-2px); }
.btn.btn-secondary { background:var(--bg-elevated); border:1px solid var(--border); box-shadow:none; color:var(--text-primary); }

.merge-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-top: 20px;
}

.merge-actions .btn {
    margin-top: 0;
}

.btn-share {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    padding: 0;
    border-radius: 12px;
}

.btn-share svg {
    width: 22px;
    height: 22px;
}

.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);
}

.local-toggle {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 14px;
    background: var(--bg-section);
    border: 1px solid var(--border);
    padding: 12px 16px;
    border-radius: 12px;
    margin: 10px 0 20px;
}
.local-copy { text-align: left; }
.local-title { font-weight: 700; color: var(--accent); }
.local-sub { color: #fff; font-size: 0.9rem; }
.switch { position: relative; display: inline-block; width: 52px; height: 28px; }
.switch input { display:none; }
.slider {
  position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--bg-elevated); transition: .3s; border-radius: 28px; border:1px solid var(--border);
}
.slider:before {
  position: absolute; content: ""; height: 22px; width: 22px; left: 3px; bottom: 3px;
  background-color: white; transition: .3s; border-radius: 50%; box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}
.switch input:checked + .slider { background: linear-gradient(135deg,var(--accent),var(--accent-hover)); }
.switch input:checked + .slider:before { transform: translateX(24px); }

.select-all-row {
    display: flex;
    justify-content: center;
    margin: 15px 0;
    color: var(--text-primary);
}

.select-all-row label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-section);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 8px 12px;
    cursor: pointer;
}

.pdf-grid { display:flex; flex-wrap:wrap; justify-content:center; margin-top:15px; gap:15px; }
.pdf-card { border-radius:12px; box-shadow:0 10px 24px rgba(0,0,0,0.35); padding:10px; text-align:center; width:150px; background:var(--bg-card); cursor:grab; border:1px solid var(--border); }
.pdf-card img { width:100%; height:auto; border-radius:8px; margin-bottom:5px; }
.pdf-card p { font-size:14px; color:var(--text-muted); margin:5px 0 0; }
.pdf-card label { display:block; margin-top:5px; cursor:pointer; color:var(--text-primary); }
.error { color:var(--error); margin-top:10px; }

@media(max-width:900px) {
    .merge-hero,
    .workspace-header {
        grid-template-columns: 1fr;
    }

    .tool-status-badges {
        justify-content: flex-start;
        max-width: none;
    }

    .workspace-mini-steps {
        min-width: 0;
        width: 100%;
    }
}

@media(max-width:600px) {
    .merge-hero {
        padding: 24px 18px;
    }

    .merge-hero h1 {
        font-size: 2rem;
    }

    .upload-section {
        padding: 20px 14px;
    }

    .workspace-mini-steps {
        grid-template-columns: 1fr;
    }

    .local-toggle {
        align-items: flex-start;
    }
}

@media(max-width:480px){ .pdf-card{ width:45%; } }

/* Content Sections */
.content-section {
    max-width: 1200px;
    margin: 50px auto;
    padding: 0 20px;
}

.content-section h2 {
    font-size: 1.6rem;
    color: var(--text-heading);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.content-section p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 15px;
}

/* Steps Guide */
.steps-guide {
    margin-top: 25px;
}

.step-item {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    align-items: flex-start;
}

.step-num {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg,var(--accent),var(--accent-hover));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.15rem;
    color: var(--text-heading);
    margin-bottom: 8px;
}

.step-content p {
    margin: 0;
    font-size: 1rem;
    color: var(--text-muted);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 25px;
    justify-items: center;
}

.feature-card {
    background: var(--bg-section);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    border:1px solid var(--border);
}

.feature-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
}

.feature-card h3 {
    font-size: 1.1rem;
    color: var(--text-heading);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.6;
    color: var(--text-muted);
}

/* Use Cases List */
.use-cases-list {
    margin: 20px 0;
    padding-left: 25px;
}

.use-cases-list li {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 12px;
}

/* Tips Container */
.tips-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.tip-box {
    background: var(--bg-section);
    border-left: 4px solid var(--accent);
    padding: 20px;
    border-radius: 0 12px 12px 0;
    border:1px solid var(--border);
}

.tip-box h3 {
    font-size: 1rem;
    color: var(--text-heading);
    margin-bottom: 10px;
}

.tip-box p {
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.6;
    color: var(--text-muted);
}

.tip-box a {
    color: var(--accent);
    text-decoration: none;
}

.tip-box a:hover {
    text-decoration: underline;
}

/* FAQ Section */
.faq-container {
    margin-top: 20px;
}

.faq-item {
    background: var(--bg-section);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 15px;
}

.faq-item h3 {
    font-size: 1.05rem;
    color: var(--text-heading);
    margin-bottom: 10px;
}

.faq-item p {
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.7;
    color: var(--text-muted);
}

.faq-item a {
    color: var(--accent);
}

.faq-more {
    text-align: center;
    margin-top: 20px;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.faq-more a {
    color: var(--accent);
    font-weight: 600;
}

/* Related Tools */
.cta-section {
    background: linear-gradient(135deg,var(--accent),var(--accent-hover));
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    color: #fff;
}

.cta-section h2 {
    border: none;
    text-align: center;
    color: #fff;
}

.related-tools {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 25px;
}

.related-tool-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-section);
    padding: 20px 25px;
    border-radius: 12px;
    text-decoration: none;
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    min-width: 140px;
    color: var(--text-primary);
}

.related-tool-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.35);
    border-color: var(--accent);
    background: var(--bg-elevated);
}

.tool-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.tool-icon svg {
    width: 32px;
    height: 32px;
}

.tool-name {
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 5px;
}

.tool-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.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); }
}

@media (max-width: 768px) {
    .content-section h2 {
        font-size: 1.4rem;
    }

    .step-item {
        flex-direction: column;
        gap: 10px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .tips-container {
        grid-template-columns: 1fr;
    }

    .related-tools {
        flex-direction: column;
        align-items: center;
    }

    .cta-section {
        padding: 25px;
    }
}

@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;
    }
}