:root{--merge-primary:#06b6d4;--merge-primary-dark:#0891b2;--merge-accent:#8b5cf6;--merge-success:#10b981;--merge-warning:#f59e0b;--merge-danger:#ef4444;--merge-ink:#f1f5f9;--merge-muted:#94a3b8;--merge-soft:#1e293b;--merge-line:rgba(255,255,255,.1);--merge-panel:#1e293b;--merge-bg:#0f172a;--merge-bg2:#1e293b;--merge-radius:12px;--merge-shadow:0 8px 32px rgba(0,0,0,.3)}
body{background:var(--merge-bg);color:var(--merge-ink);min-height:100vh}
.breadcrumb-nav{background:var(--merge-nav-bg);backdrop-filter:blur(20px);border-bottom:1px solid var(--merge-line);font-size:.875rem;padding:12px 0}
.breadcrumb-nav a{color:var(--merge-accent);font-weight:600}.breadcrumb-nav .sep{color:var(--merge-muted);margin:0 8px}.breadcrumb-nav .cur{color:var(--merge-muted)}
.hero{padding:24px 0 6px}
.hero .container{position:relative;z-index:1}.hero h1{font-size:clamp(1.6rem,3.5vw,2.4rem);font-weight:850;line-height:1.2;margin:0 0 10px;color:var(--merge-ink)}
.hero p{font-size:1rem;color:var(--merge-muted);margin:0;line-height:1.6}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.hero-badge{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--merge-line);background:var(--merge-panel);border-radius:999px;padding:6px 10px;font-size:.82rem;color:var(--merge-muted)}
.tool-wrapper{padding:20px 0 44px}.tool-card-main{background:var(--merge-panel);border:1px solid rgba(255,255,255,.08);border-radius:16px;box-shadow:var(--merge-shadow);overflow:hidden}
.steps-container{display:grid;grid-template-columns:1fr 1fr 1fr;border-bottom:1px solid var(--merge-line);background:var(--merge-bg2)}
.step-item{display:flex;align-items:center;justify-content:center;gap:10px;padding:16px 12px;color:var(--merge-muted);font-weight:700;font-size:.92rem;border-right:1px solid var(--merge-line);transition:all .2s}
.step-item:last-child{border-right:0}.step-item.active{background:var(--merge-panel);color:var(--merge-primary)}.step-number{width:28px;height:28px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:rgba(6,182,212,.15);color:var(--merge-primary);font-weight:800;transition:all .3s}
.step-item.active .step-number{background:var(--merge-primary);color:#0f172a;transform:scale(1.1)}
.tool-section{padding:28px;animation:fadeUp .35s ease}.section-label{font-size:1.22rem;font-weight:800;margin:0 0 14px;display:flex;align-items:center;gap:10px;color:var(--merge-ink)}
.upload-area{border:2px dashed rgba(255,255,255,.15);background:rgba(255,255,255,.03);border-radius:14px;padding:38px 22px;text-align:center;cursor:pointer;transition:all .2s ease}
.upload-area:hover,.upload-area.dragover{border-color:var(--merge-primary);background:rgba(6,182,212,.08);transform:scale(1.01)}.upload-icon-circle{width:68px;height:68px;margin:0 auto 14px;border-radius:18px;background:linear-gradient(135deg,var(--merge-primary),var(--merge-accent));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.8rem;box-shadow:0 12px 24px rgba(6,182,212,.24)}
.upload-area h3{font-size:1.35rem;margin-bottom:6px}.upload-area p{color:var(--merge-muted);margin-bottom:14px}.upload-badges{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.badge-file{display:inline-flex;align-items:center;gap:7px;background:var(--merge-panel);border:1px solid var(--merge-line);border-radius:999px;padding:7px 11px;font-size:.84rem;color:var(--merge-muted)}
.file-list-container{display:grid;gap:10px;margin-top:18px;min-height:60px}
.file-item-card{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:14px;border:1px solid var(--merge-line);background:var(--merge-panel);border-radius:12px;transition:all .2s;animation:fadeIn .3s ease}
.file-item-card.dragging{opacity:.5;border-color:var(--merge-primary);background:rgba(6,182,212,.08)}
.file-item-card.drag-over{border-color:var(--merge-primary);border-style:dashed;background:rgba(6,182,212,.06);transform:scale(1.02)}
.file-type-icon{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.2rem}.file-type-icon.pdf{background:rgba(239,68,68,.15);color:#ef4444}.file-type-icon.txt{background:rgba(59,130,246,.15);color:#60a5fa}
.file-name-text{font-weight:800;color:var(--merge-ink);word-break:break-word}.file-meta-text{font-size:.82rem;color:var(--merge-muted);margin-top:2px}.file-meta-text.error{color:var(--merge-danger);font-weight:700}
.file-drag-handle{width:28px;height:28px;border-radius:8px;background:transparent;border:1px dashed var(--merge-line);color:var(--merge-muted);display:inline-flex;align-items:center;justify-content:center;cursor:grab;font-size:.7rem;transition:all .2s}
.file-drag-handle:hover{background:rgba(255,255,255,.05);color:var(--merge-primary);border-color:var(--merge-primary)}
.file-actions{display:flex;gap:6px;align-items:center}.icon-btn{width:34px;height:34px;border:1px solid var(--merge-line);background:transparent;color:var(--merge-muted);border-radius:8px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:all .18s}
.icon-btn:hover:not(:disabled){border-color:var(--merge-primary);color:var(--merge-primary);background:rgba(6,182,212,.08)}.icon-btn:disabled{opacity:.4;cursor:not-allowed}
.empty-state{text-align:center;margin-top:18px;padding:28px;border:1px dashed var(--merge-line);border-radius:12px;background:var(--merge-panel);color:var(--merge-muted)}.empty-state i{font-size:2.4rem;display:block;margin-bottom:8px;color:var(--merge-muted)}.empty-state h4{color:var(--merge-ink);font-size:1rem;margin-bottom:4px}
.info-bar{display:none;margin-top:16px;background:var(--merge-soft);border:1px solid var(--merge-line);border-radius:12px;padding:14px;animation:fadeUp .3s ease}.info-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.stat-item{text-align:center;background:var(--merge-panel);border:1px solid var(--merge-line);border-radius:10px;padding:12px;transition:all .2s}.stat-item:hover{border-color:var(--merge-primary);box-shadow:0 4px 12px rgba(6,182,212,.15)}
.stat-value{font-weight:850;font-size:1.1rem;color:var(--merge-primary)}.stat-label{font-size:.75rem;color:var(--merge-muted);text-transform:uppercase;letter-spacing:.04em}
.settings-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}.setting-field{display:flex;flex-direction:column;gap:6px}
.setting-field label{font-size:.78rem;font-weight:800;color:var(--merge-muted);text-transform:uppercase;letter-spacing:.04em}.setting-field input,.setting-field select{width:100%;border:1px solid var(--merge-line);border-radius:9px;background:var(--merge-panel);color:var(--merge-ink);padding:9px 10px;font-size:.9rem}
.setting-check{display:flex;align-items:center;gap:8px;background:var(--merge-panel);border:1px solid var(--merge-line);border-radius:9px;padding:10px;font-size:.88rem;color:var(--merge-muted)}.setting-check input{accent-color:var(--merge-primary)}
.actions-row{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap;margin-top:18px}.btn-tool{border:none;border-radius:10px;padding:11px 17px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:all .2s;text-decoration:none}
.btn-tool:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(6,182,212,.25)}.btn-tool:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.btn-primary-tool{background:linear-gradient(135deg,var(--merge-primary),var(--merge-accent));color:#0f172a}
.btn-secondary-tool{background:transparent;color:var(--merge-ink);border:1px solid var(--merge-line)}
.btn-secondary-tool:hover{border-color:var(--merge-primary);color:var(--merge-primary)}
.page-selection-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.quick-actions-bar{background:var(--merge-soft);border:1px solid var(--merge-line);border-radius:12px;padding:12px;margin-bottom:14px}
.actions-header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.selected-count-badge{display:inline-flex;align-items:center;gap:7px;background:var(--merge-panel);border:1px solid var(--merge-line);border-radius:999px;padding:7px 11px;font-weight:800;color:var(--merge-primary);font-size:.88rem}
.quick-btn-group{display:flex;gap:7px;flex-wrap:wrap}.btn-quick,.btn-file-quick{border:1px solid var(--merge-line);background:transparent;color:var(--merge-muted);border-radius:8px;padding:7px 10px;font-size:.8rem;font-weight:800;cursor:pointer;transition:all .18s}
.btn-quick:hover,.btn-file-quick:hover{border-color:var(--merge-primary);color:var(--merge-primary);background:rgba(6,182,212,.08)}
.pages-grid-container{display:grid;gap:14px}.file-pages-card{background:var(--merge-panel);border:1px solid var(--merge-line);border-radius:12px;padding:14px;animation:fadeIn .3s ease}.file-pages-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px}
.file-pages-title{font-weight:850;color:var(--merge-ink);word-break:break-word}.file-page-count{font-size:.8rem;font-weight:800;color:var(--merge-muted);white-space:nowrap}
.file-quick-btns{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.pages-checkbox-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(46px,1fr));gap:8px}.page-check-item{position:absolute;opacity:0;pointer-events:none}
.page-check-label{width:100%;min-height:42px;border:1px solid var(--merge-line);border-radius:9px;display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--merge-muted);background:var(--merge-soft);cursor:pointer;transition:all .15s}
.page-check-item:checked+.page-check-label{background:var(--merge-primary);border-color:var(--merge-primary);color:#0f172a;transform:scale(1.05);box-shadow:0 2px 8px rgba(6,182,212,.3)}
.page-check-label.ai-skip{background:rgba(245,158,11,.15);border-color:var(--merge-warning);color:#fbbf24}.page-check-item:checked+.page-check-label.ai-skip{background:var(--merge-warning);border-color:#d97706;color:#0f172a}
.text-include-row{display:flex;align-items:center;gap:10px;background:var(--merge-soft);border:1px solid var(--merge-line);border-radius:10px;padding:12px;color:var(--merge-muted)}.text-include-row input{accent-color:var(--merge-primary);width:18px;height:18px}
.custom-range-input-group{display:flex;gap:10px;margin-top:16px}.range-input-field{flex:1;border:1px solid var(--merge-line);border-radius:10px;padding:11px 12px;background:var(--merge-panel);color:var(--merge-ink)}.range-input-field:focus{border-color:var(--merge-primary);outline:none;box-shadow:0 0 0 3px rgba(6,182,212,.15)}
.preview-stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}.preview-stat-card{border:1px solid var(--merge-line);background:var(--merge-soft);border-radius:12px;padding:16px;text-align:center;transition:all .2s}
.preview-stat-card:hover{border-color:var(--merge-primary);transform:translateY(-2px)}
.stat-icon{font-size:1.2rem;color:var(--merge-primary);margin-bottom:5px}.stat-number{font-size:1.6rem;font-weight:850;color:var(--merge-ink)}.stat-desc{font-size:.82rem;color:var(--merge-muted)}
.selected-summary{border:1px solid var(--merge-line);border-radius:12px;background:var(--merge-panel);padding:14px;margin-bottom:16px}.summary-item{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid rgba(255,255,255,.06);padding:8px 0;animation:fadeIn .2s ease}
.summary-item:last-child{border-bottom:0}.summary-name{font-weight:800;color:var(--merge-ink);word-break:break-word}.summary-pages{color:var(--merge-muted);font-size:.88rem;text-align:right}
.preview-display{background:#0f172a;color:#dbeafe;border-radius:14px;padding:20px;min-height:120px;display:flex;align-items:center;justify-content:center;text-align:center}
.progress-wrapper{display:none;margin:16px 0;animation:fadeUp .3s ease}.progress-track{height:10px;background:rgba(255,255,255,.1);border-radius:999px;overflow:hidden}
.progress-fill-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--merge-primary),var(--merge-success));transition:width .25s;border-radius:999px}
.progress-text{font-size:.88rem;color:var(--merge-muted);margin-top:8px;text-align:center}
.result-success-card,.result-error-card{display:none;margin:22px auto 0;max-width:650px;border-radius:16px;padding:28px;text-align:center;animation:scaleIn .35s ease}
.result-success-card{background:linear-gradient(135deg,#059669,#0ea5e9);color:#fff}.result-error-card{background:rgba(239,68,68,.12);color:#fca5a5;border:1px solid rgba(239,68,68,.25)}
.result-stats{display:flex;justify-content:center;gap:34px;margin:18px 0}.rs-num{font-size:2rem;font-weight:850}.rs-label{font-size:.86rem;opacity:.86}
.result-buttons{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.btn-result{border:none;border-radius:10px;padding:11px 16px;font-weight:850;cursor:pointer;transition:all .2s}
.btn-result:hover{transform:translateY(-2px)}.btn-result-light{background:#fff;color:var(--merge-primary)}.btn-result-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.7)}
.btn-result-outline:hover{background:rgba(255,255,255,.1)}.result-error-card .btn-result-outline{color:#fca5a5;border-color:rgba(239,68,68,.35)}
.result-error-card .btn-result-outline:hover{background:rgba(239,68,68,.1)}
.content-section{padding:38px 0 0}.trust-bar{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.trust-item{display:flex;align-items:center;gap:8px;background:var(--merge-panel);border:1px solid var(--merge-line);border-radius:999px;padding:9px 12px;color:var(--merge-muted);font-size:.86rem}
.trust-item i{color:var(--merge-success)}
.content-card{background:var(--merge-panel);border:1px solid rgba(255,255,255,.08);border-radius:14px;box-shadow:0 8px 22px rgba(0,0,0,.12);padding:28px;margin-bottom:18px}
.content-card h2{font-size:1.45rem;margin-bottom:12px;color:var(--merge-ink)}.content-card h3{font-size:1.08rem;margin:18px 0 8px;color:var(--merge-ink)}.content-card p,.content-card li{color:var(--merge-muted);line-height:1.8}.content-card ul{padding-left:20px}
.usage-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin-top:18px}.usage-step{border:1px solid var(--merge-line);border-radius:12px;background:var(--merge-soft);padding:16px;transition:all .2s}
.usage-step:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(6,182,212,.12)}
.usage-step .u-icon{width:38px;height:38px;border-radius:10px;background:var(--merge-primary);color:#0f172a;display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.usage-step h4{font-size:.95rem;margin-bottom:6px}.usage-step p{font-size:.86rem;margin:0;color:var(--merge-muted)}
.case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px}.case-card{border:1px solid var(--merge-line);border-radius:12px;background:var(--merge-soft);padding:16px;transition:all .2s}
.case-card:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(6,182,212,.1)}
.case-number{width:28px;height:28px;border-radius:50%;background:var(--merge-primary);color:#0f172a;display:flex;align-items:center;justify-content:center;font-weight:850;margin-bottom:8px}
.case-card h3{font-size:.98rem;margin:0 0 8px}.case-detail{font-size:.86rem;color:var(--merge-muted);margin-bottom:6px;line-height:1.55}
.faq-item{border:1px solid var(--merge-line);border-radius:10px;margin-bottom:8px;overflow:hidden;background:var(--merge-panel);transition:all .2s}
.faq-item:hover{border-color:rgba(255,255,255,.15)}.faq-q{width:100%;border:none;background:var(--merge-soft);color:var(--merge-ink);font-weight:850;text-align:left;padding:13px 16px;display:flex;justify-content:space-between;gap:10px;cursor:pointer;transition:background .15s}
.faq-q:hover{background:rgba(255,255,255,.05)}.faq-a{max-height:0;overflow:hidden;transition:max-height .3s cubic-bezier(.4,0,.2,1)}
.faq-item.open .faq-a{max-height:400px}.faq-a-inner{padding:0 16px 14px;color:var(--merge-muted);font-size:.9rem;line-height:1.7}
.related-tools{background:var(--merge-panel);border:1px solid rgba(255,255,255,.08);border-radius:14px;box-shadow:0 8px 22px rgba(0,0,0,.12);padding:24px;margin:26px 0}
.related-tools h2{font-size:1.35rem;margin-bottom:6px}.related-tools>p{color:var(--merge-muted);margin-bottom:14px}
.related-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}@media(max-width:991px){.related-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:575px){.related-grid{grid-template-columns:repeat(2,1fr)}}.related-card{display:flex;gap:10px;text-decoration:none;border:1px solid var(--merge-line);border-radius:12px;background:var(--merge-soft);padding:14px;transition:all .2s}
.related-card:hover{border-color:var(--merge-primary);transform:translateY(-3px);box-shadow:0 8px 20px rgba(6,182,212,.12)}
.related-card .r-icon{width:36px;height:36px;border-radius:9px;background:rgba(6,182,212,.15);color:var(--merge-primary);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.r-name{display:block;font-weight:850;color:var(--merge-ink);font-size:.86rem}.r-desc{display:block;color:var(--merge-muted);font-size:.78rem;line-height:1.35;margin-top:3px}
.privacy-note{display:flex;gap:14px;align-items:flex-start;background:rgba(16,185,129,.08);border:1px solid rgba(16,185,129,.2);border-radius:10px;padding:14px}.privacy-note i{color:var(--merge-success);font-size:1.4rem;margin-top:2px}.privacy-note h3{margin-top:0;color:var(--merge-ink);font-size:1rem}
.loading-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);display:none;align-items:center;justify-content:center;z-index:9999;padding:20px;animation:fadeIn .15s ease}.loading-overlay.active{display:flex}
.loader-box{background:var(--merge-panel);border-radius:16px;padding:24px;max-width:320px;width:100%;text-align:center;box-shadow:0 18px 48px rgba(0,0,0,.5)}.loader-spinner{width:48px;height:48px;border:4px solid var(--merge-line);border-top-color:var(--merge-primary);border-radius:50%;margin:0 auto 14px;animation:spin .8s linear infinite}.loader-box h3{color:var(--merge-ink)}.loader-box p{color:var(--merge-muted);font-size:.86rem}
.toast-msg{position:fixed;right:20px;top:20px;z-index:10000;max-width:380px;background:#1e293b;color:#fff;border-radius:10px;padding:12px 14px;box-shadow:0 12px 28px rgba(0,0,0,.4);opacity:0;transform:translateX(30px);pointer-events:none;transition:all .22s}
.toast-msg.visible{opacity:1;transform:translateX(0)}.toast-success{border-left:4px solid var(--merge-success)}.toast-warning{border-left:4px solid var(--merge-warning)}.toast-error{border-left:4px solid var(--merge-danger)}.toast-info{border-left:4px solid var(--merge-primary)}
.ai-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;background:linear-gradient(135deg,rgba(6,182,212,.15),rgba(139,92,246,.1));border:1px solid rgba(6,182,212,.25);border-radius:999px;font-size:.7rem;font-weight:700;color:var(--merge-primary)}
.ai-suggest-btn{background:linear-gradient(135deg,#f59e0b,#d97706);color:#0f172a}.ai-suggest-btn:hover{background:linear-gradient(135deg,#d97706,#b45309)}
.ai-summary-box{display:none;background:linear-gradient(135deg,rgba(6,182,212,.08),rgba(139,92,246,.05));border:1px solid rgba(6,182,212,.15);border-radius:12px;padding:14px;margin-top:12px;animation:fadeUp .3s ease}
.ai-summary-box.visible{display:block}.ai-summary-title{font-weight:850;color:var(--merge-ink);margin-bottom:6px}.ai-summary-text{font-size:.85rem;color:var(--merge-muted);line-height:1.6}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes scaleIn{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:900px){.settings-grid{grid-template-columns:1fr 1fr}.info-stats,.preview-stats-row{grid-template-columns:1fr 1fr}.steps-container{grid-template-columns:1fr}.step-item{border-right:0;border-bottom:1px solid var(--merge-line)}.step-item:last-child{border-bottom:0}}
@media(max-width:640px){.hero{padding:16px 0 4px}.tool-section{padding:18px}.file-item-card{grid-template-columns:auto 1fr}.file-actions{grid-column:1/-1;justify-content:flex-end}.settings-grid,.info-stats,.preview-stats-row{grid-template-columns:1fr}.page-selection-header,.actions-header,.file-pages-header{align-items:stretch;flex-direction:column}.custom-range-input-group{flex-direction:column}.actions-row{justify-content:stretch}.btn-tool{width:100%}.summary-item{flex-direction:column}.summary-pages{text-align:left}.result-stats{flex-direction:column;gap:12px}}
#app-content[data-theme="dark"]{--bg-gradient:linear-gradient(160deg,#0f172a 0%,#1e293b 100%);--bg-body:#0f172a;--bg-card:#1e293b;--text:#f1f5f9;--text-light:#94a3b8;--border:rgba(255,255,255,.1);--shadow:0 8px 32px rgba(0,0,0,.3);--primary-light:rgba(6,182,212,.12);--dark:#f1f5f9;--gray:#94a3b8;--light:#ffffff;--shadow-primary:0 5px 15px rgba(6,182,212,.25);--shadow-lg:0 8px 32px rgba(0,0,0,.25);--shadow-xl:0 12px 48px rgba(0,0,0,.3);--gradient-primary:linear-gradient(135deg,#06b6d4,#8b5cf6);--gradient-accent:linear-gradient(135deg,#f72585,#7209b7);--gradient-success:linear-gradient(135deg,#10b981,#0284c7);--merge-primary:#06b6d4;--merge-primary-dark:#0891b2;--merge-accent:#8b5cf6;--merge-success:#10b981;--merge-warning:#f59e0b;--merge-danger:#ef4444;--merge-ink:#f1f5f9;--merge-muted:#94a3b8;--merge-soft:#1e293b;--merge-line:rgba(255,255,255,.1);--merge-panel:#1e293b;--merge-bg:#0f172a;--merge-bg2:#1e293b;--merge-radius:12px;--merge-shadow:0 8px 32px rgba(0,0,0,.3);--merge-nav-bg:rgba(15,23,42,.85)}
#app-content[data-theme="light"]{--bg-gradient:linear-gradient(160deg,#f0f4ff 0%,#e8ffe8 40%,#f5f0ff 100%);--bg-body:#f8fafc;--bg-card:#ffffff;--text:#475569;--text-light:#94a3b8;--border:#e2e8f0;--shadow:0 4px 24px rgba(67,97,238,0.08);--primary-light:rgba(67,97,238,0.08);--dark:#1a1a2e;--gray:#475569;--light:#1e293b;--shadow-primary:0 5px 15px rgba(67,97,238,.18);--shadow-lg:0 8px 32px rgba(0,0,0,.1);--shadow-xl:0 12px 48px rgba(0,0,0,.12);--gradient-primary:linear-gradient(135deg,#06b6d4,#8b5cf6);--gradient-accent:linear-gradient(135deg,#f72585,#7209b7);--gradient-success:linear-gradient(135deg,#10b981,#0284c7);--merge-primary:#06b6d4;--merge-primary-dark:#0891b2;--merge-accent:#8b5cf6;--merge-success:#10b981;--merge-warning:#f59e0b;--merge-danger:#ef4444;--merge-ink:#1e293b;--merge-muted:#64748b;--merge-soft:#f1f5f9;--merge-line:#e2e8f0;--merge-panel:#ffffff;--merge-bg:#f8fafc;--merge-bg2:#ffffff;--merge-radius:12px;--merge-shadow:0 4px 24px rgba(0,0,0,.08);--merge-nav-bg:rgba(248,250,252,.85)}#floatThemeToggle{position:fixed;top:100px;right:20px;width:48px;height:48px;background:var(--bg-card);border:1px solid var(--border);border-radius:50%;cursor:pointer;z-index:1000;display:flex;align-items:center;justify-content:center;color:var(--text);font-size:1.2rem;box-shadow:var(--shadow);transition:all .3s}#floatThemeToggle:hover{background:var(--primary);color:#fff;border-color:var(--primary)}#backToTop{position:fixed;bottom:30px;right:20px;width:48px;height:48px;background:var(--primary);border:none;border-radius:50%;cursor:pointer;z-index:1000;display:none;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;box-shadow:0 10px 20px rgba(0,0,0,0.2);transition:all .3s}#backToTop:hover{background:var(--primary-dark);transform:translateY(-3px)}#backToTop.show{display:flex}