.upload-section { margin-top:50px; background:var(--bg-card); padding:40px; 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); }
.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;
}
.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); }

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

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

.rotate-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;
}

.rotate-actions .btn-share::before {
    content: none;
    display: none;
}

.rotate-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);
}

.local-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    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); }

/* Apply All Rotation */
.rotation-controls {
    margin: 20px 0;
    padding: 15px;
    background: var(--bg-section);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.rotation-controls label {
    display: inline-block;
    margin-right: 10px;
    font-weight: 500;
    color: var(--text-primary);
}

.rotation-controls select, .rotation-controls button {
    padding: 8px 15px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 14px;
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.apply-all-btn {
    background: linear-gradient(135deg,var(--accent),var(--accent-hover));
    color: #fff;
    border: 1px solid rgba(255,255,255,0.08);
    cursor: pointer;
    font-weight: 500;
    margin-left: 10px;
    transition: all 0.3s ease;
}

.apply-all-btn:hover {
    transform: translateY(-2px);
}

/* PDF Thumbnail Card */
.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: 180px;
    background: var(--bg-card);
    border: 1px solid var(--border);
}
.pdf-card img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 10px;
    transition: transform 0.3s ease;
}
.pdf-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 5px 0;
    font-weight: 500;
}

.rotation-select {
    width: 100%;
    padding: 8px;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-top: 8px;
    font-size: 14px;
    background: var(--bg-elevated);
    color: var(--text-primary);
    cursor: pointer;
}

/* Error */
.error {
    color: var(--error);
    margin-top: 10px;
    padding: 10px;
    background: rgba(198,40,40,0.14);
    border-radius: 8px;
    border: 1px solid rgba(198,40,40,0.5);
}

/* Responsive */
@media(max-width:768px){
    .pdf-card{ width: 45%; }
    .rotation-controls {
        text-align: center;
    }
    .rotation-controls label,
    .rotation-controls select,
    .apply-all-btn {
        display: block;
        margin: 10px auto;
        width: 200px;
    }
}

/* 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; 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 { font-size: 2rem; margin-bottom: 10px; }
.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; }
    .local-toggle { flex-direction: column; text-align: center; }
    .local-copy { text-align: center; }
}

@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; }
}