:root{--bg:#f5f7fb;--surface:#fff;--surface2:#f0f3f8;--text:#172033;--muted:#687387;--line:#dce3ed;--primary:#e33b45;--primary2:#b71f39;--soft:#fff0f1;--shadow:0 18px 50px rgba(32,48,78,.1);--radius:22px}
[data-theme=dark]{--bg:#0e131d;--surface:#171e2a;--surface2:#202938;--text:#edf2fb;--muted:#a8b2c3;--line:#303b4e;--primary:#ff6670;--primary2:#e63f58;--soft:#3b2028;--shadow:0 18px 55px rgba(0,0,0,.28)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.55}button,input,select{font:inherit}.container{width:min(1160px,calc(100% - 32px));margin:auto}.hidden{display:none!important}.header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(15px);border-bottom:1px solid var(--line)}.nav,.footer{display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:20px}.brand{display:flex;align-items:center;gap:11px;color:var(--text);font-weight:850;text-decoration:none}.logo{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:white;font-size:.78rem}.icon-button{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--text);cursor:pointer}.hero{padding:72px 0 52px}.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:50px;align-items:center}.badge{display:inline-block;padding:8px 13px;border-radius:999px;background:var(--soft);color:var(--primary);font-size:.84rem;font-weight:800}.hero h1{max-width:780px;font-size:clamp(2.55rem,5.5vw,5rem);line-height:1;letter-spacing:-.055em;margin:20px 0}.hero p{max-width:700px;font-size:1.12rem;color:var(--muted)}.hero-art{height:300px;position:relative}.page{position:absolute;width:180px;height:235px;border-radius:17px;display:grid;place-items:center;color:white;font-weight:900;font-size:1.35rem;box-shadow:var(--shadow);border:8px solid rgba(255,255,255,.3)}.p1{left:0;top:35px;background:#e33b45;transform:rotate(-10deg)}.p2{left:80px;top:10px;background:#f26e45;transform:rotate(4deg)}.p3{left:160px;top:50px;background:#2867b2;transform:rotate(12deg)}.tools-section{padding-bottom:60px}.tabs{display:flex;gap:8px;padding:8px;background:var(--surface2);border-radius:16px;margin-bottom:20px;overflow:auto}.tab{flex:1;min-width:150px;border:0;border-radius:11px;padding:12px 15px;background:transparent;color:var(--muted);font-weight:800;cursor:pointer}.tab.active{background:var(--surface);color:var(--primary);box-shadow:0 4px 16px rgba(35,50,80,.08)}.tool-panel{display:none;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.tool-panel.active{display:block}.panel-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:22px}.step{display:block;text-transform:uppercase;letter-spacing:.12em;color:var(--primary);font-size:.75rem;font-weight:900;margin-bottom:4px}.panel-heading h2{margin:0}.reset-link{border:0;background:none;color:var(--primary);font-weight:800;cursor:pointer}.dropzone{position:relative;text-align:center;padding:48px 24px;border:2px dashed var(--line);border-radius:19px;background:var(--surface2);transition:.2s}.dropzone.drag{border-color:var(--primary);background:var(--soft)}.dropzone input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.drop-icon{width:60px;height:60px;margin:0 auto 12px;border-radius:18px;display:grid;place-items:center;background:var(--soft);color:var(--primary);font-size:1.8rem;font-weight:900}.dropzone h3{margin:0}.dropzone p{margin:4px 0;color:var(--muted)}.dropzone small{color:var(--muted)}.workspace{margin-top:22px}.file-card{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:15px 17px;border:1px solid var(--line);border-radius:14px;background:var(--surface2)}.file-card strong,.file-card span{display:block}.file-card span{color:var(--muted);font-size:.84rem}.small-button,.secondary-button{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:10px;padding:9px 12px;font-weight:750;cursor:pointer}.controls-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:20px 0}.controls-grid label>span{display:block;font-size:.84rem;font-weight:800;margin-bottom:7px}.controls-grid input,.controls-grid select{width:100%;padding:12px;border-radius:11px;border:1px solid var(--line);background:var(--surface2);color:var(--text)}.primary-button{width:100%;border:0;border-radius:13px;padding:14px 18px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:white;font-weight:900;cursor:pointer;margin-top:16px}.secondary-button{width:100%;margin-top:15px}.thumb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:12px;margin:18px 0}.thumb{padding:8px;border:1px solid var(--line);border-radius:12px;background:var(--surface2);text-align:center}.thumb canvas{width:100%;height:auto;border-radius:7px;background:white}.thumb span{font-size:.78rem;color:var(--muted)}.progress{margin-top:18px}.bar{height:10px;background:var(--surface2);border-radius:999px;overflow:hidden}.bar span{display:block;height:100%;width:30%;background:linear-gradient(90deg,var(--primary),#f69a5d);animation:move 1.1s infinite alternate}.progress p{text-align:center;color:var(--muted)}@keyframes move{to{transform:translateX(230%)}}.results{padding:18px;margin-top:18px;border-radius:14px;background:var(--soft);border:1px solid color-mix(in srgb,var(--primary) 25%,var(--line))}.download-link{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:11px 0;color:var(--text);text-decoration:none;border-bottom:1px solid var(--line)}.download-link:last-child{border-bottom:0}.download-link strong{color:var(--primary)}.sortable-list{display:grid;gap:10px}.merge-item{display:grid;grid-template-columns:auto 1fr auto auto;align-items:center;gap:13px;padding:13px;border-radius:13px;border:1px solid var(--line);background:var(--surface2)}.merge-item.dragging{opacity:.45}.handle{cursor:grab;color:var(--muted);font-size:1.2rem}.merge-item span{display:block;color:var(--muted);font-size:.82rem}.remove-file{border:0;background:none;color:var(--primary);font-weight:800;cursor:pointer}.hint,.notice{padding:14px 16px;border-radius:13px;margin-bottom:18px}.hint{background:var(--surface2);color:var(--muted)}.warning{background:#fff7df;color:#725711;border:1px solid #f0d887}[data-theme=dark] .warning{background:#382f19;color:#f4dc8e;border-color:#5e4b1c}.check{display:flex;align-items:center;gap:9px;color:var(--muted)}.check input{width:18px;height:18px;accent-color:var(--primary)}.info-section{padding:55px 0 75px}.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.info-grid article{padding:23px;background:var(--surface);border:1px solid var(--line);border-radius:17px}.info-grid h3{margin-top:0}.info-grid p{color:var(--muted);margin-bottom:0}footer{border-top:1px solid var(--line);color:var(--muted);font-size:.88rem}.toast{position:fixed;right:22px;bottom:22px;background:var(--text);color:var(--surface);padding:11px 15px;border-radius:11px;opacity:0;transform:translateY(8px);transition:.2s;pointer-events:none;z-index:50}.toast.show{opacity:1;transform:none}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr}.hero-art{display:none}.info-grid{grid-template-columns:1fr}.controls-grid{grid-template-columns:1fr}}@media(max-width:600px){.hero{padding-top:48px}.tool-panel{padding:18px}.panel-heading,.footer{flex-direction:column}.merge-item{grid-template-columns:auto 1fr auto}.merge-item .pages{display:none}}