/* EditPDF editor app — desktop-first with mobile bottom-sheet */
@font-face{font-family:'Carlito';src:url('../fonts/Carlito_400Regular.ttf') format('truetype');font-weight:400}
@font-face{font-family:'Carlito';src:url('../fonts/Carlito_700Bold.ttf') format('truetype');font-weight:700}
@font-face{font-family:'Arimo';src:url('../fonts/Arimo_400Regular.ttf') format('truetype');font-weight:400}
@font-face{font-family:'Arimo';src:url('../fonts/Arimo_700Bold.ttf') format('truetype');font-weight:700}
@font-face{font-family:'Tinos';src:url('../fonts/Tinos_400Regular.ttf') format('truetype');font-weight:400}
@font-face{font-family:'Tinos';src:url('../fonts/Tinos_700Bold.ttf') format('truetype');font-weight:700}
@font-face{font-family:'Cousine';src:url('../fonts/Cousine_400Regular.ttf') format('truetype');font-weight:400}
@font-face{font-family:'Cousine';src:url('../fonts/Cousine_700Bold.ttf') format('truetype');font-weight:700}
@font-face{font-family:'Caladea';src:url('../fonts/Caladea_400Regular.ttf') format('truetype');font-weight:400}
@font-face{font-family:'Caladea';src:url('../fonts/Caladea_700Bold.ttf') format('truetype');font-weight:700}
:root{
  --ink:#0f172a; --muted:#475569; --faint:#94a3b8;
  --brand:#4f46e5; --brand-d:#4338ca; --soft:#eef2ff;
  --green:#16a34a; --green-d:#15803d;
  --bg:#e8edf3; --card:#fff; --line:#dbe2ec;
  --radius:10px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);overflow:hidden}
button{font-family:inherit}

/* ---------- top bar ---------- */
.topbar{display:flex;align-items:center;gap:10px;background:var(--card);border-bottom:1px solid var(--line);padding:8px 14px;height:58px;position:relative;z-index:40}
.topbar .logo{font-weight:800;font-size:18px;text-decoration:none;color:var(--ink);letter-spacing:-.4px;flex:none}
.topbar .logo b{color:var(--brand)}
.topbar .filename{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px}
.top-actions{margin-left:auto;display:flex;gap:8px;align-items:center;flex:none}
.btn{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 12px;font-size:14px;font-weight:600;cursor:pointer;color:var(--ink)}
.btn:hover{background:#f1f5f9}
.btn:disabled{opacity:.4;cursor:default}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-d)}
.btn.download{background:var(--green);border-color:var(--green);color:#fff;font-size:15px;padding:9px 22px;font-weight:800}
.btn.download:hover{background:var(--green-d)}

/* ---------- toolbar ---------- */
.toolbar{display:flex;gap:4px;background:var(--card);border-bottom:1px solid var(--line);padding:8px 12px;overflow-x:auto;position:relative;z-index:30}
.tool-btn{flex:none;display:flex;flex-direction:column;align-items:center;gap:2px;min-width:74px;padding:8px 6px;border:1px solid transparent;background:none;border-radius:var(--radius);cursor:pointer;color:var(--ink)}
.tool-btn .k{font-size:9px;color:var(--faint);font-weight:700;border:1px solid var(--line);border-radius:4px;padding:0 4px;line-height:1.5}
.tool-btn .t-ico{font-size:20px;line-height:1}
.tool-btn .t-name{font-size:12px;font-weight:600}
.tool-btn:hover{background:#f1f5f9}
.tool-btn.active{background:var(--soft);border-color:var(--brand);color:var(--brand-d)}
.tool-btn.active .k{border-color:var(--brand);color:var(--brand)}
.tool-sep{flex:none;width:1px;background:var(--line);margin:4px 6px}

/* ---------- main layout ---------- */
.layout{display:flex;height:calc(100% - 58px - 57px)} /* topbar + toolbar */
.rail{width:150px;flex:none;background:var(--card);border-right:1px solid var(--line);overflow-y:auto;padding:10px;display:flex;flex-direction:column;gap:10px}
.stage{flex:1;overflow:auto;position:relative;display:flex;justify-content:center;padding:24px;min-width:0}
.side{width:264px;flex:none;background:var(--card);border-left:1px solid var(--line);overflow-y:auto;padding:16px}
.side-x{display:none}
.side:empty{display:none}

/* thumbnails */
.thumb{position:relative;border:2px solid var(--line);border-radius:8px;overflow:hidden;cursor:pointer;background:#fff;flex:none}
.thumb canvas{width:100%;display:block}
.thumb .pnum{position:absolute;left:6px;bottom:4px;font-size:11px;font-weight:700;background:rgba(15,23,42,.75);color:#fff;border-radius:6px;padding:1px 7px}
.thumb.current{border-color:var(--brand);box-shadow:0 0 0 2px #c7d2fe}
.thumb .t-actions{position:absolute;top:4px;right:4px;display:none;gap:4px}
.thumb:hover .t-actions,.thumb.current .t-actions{display:flex}
.t-actions button{width:24px;height:24px;border:none;border-radius:6px;background:rgba(15,23,42,.8);color:#fff;font-size:13px;cursor:pointer;line-height:1}
.thumb.dragging{opacity:.4}
.thumb.deleted{opacity:.35;filter:grayscale(1)}

/* page canvas */
.page-wrap{position:relative;flex:none;box-shadow:0 4px 28px rgba(15,23,42,.18);border-radius:4px;background:#fff}
.page-wrap canvas{display:block;border-radius:4px}
.page-wrap canvas.overlay{position:absolute;inset:0}
.page-nav{position:sticky;bottom:18px;margin:14px auto 0;display:flex;gap:10px;align-items:center;background:rgba(15,23,42,.85);color:#fff;border-radius:999px;padding:6px 14px;font-size:14px;width:max-content}
.page-nav button{background:none;border:none;color:#fff;font-size:16px;cursor:pointer;padding:2px 8px}
.scan-banner{position:absolute;top:10px;left:50%;transform:translateX(-50%);background:#fef3c7;border:1px solid #f59e0b;color:#92400e;font-size:13px;font-weight:600;border-radius:999px;padding:6px 16px;white-space:nowrap;z-index:5}

/* ---------- floating text panel ---------- */
.float-panel{position:absolute;z-index:20;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 40px rgba(15,23,42,.25);padding:14px;width:320px;max-width:calc(100vw - 40px)}
.float-panel .detected{font-size:12.5px;color:var(--muted);margin-bottom:8px}
.float-panel .detected b{color:var(--ink)}
.float-panel label{font-size:12px;font-weight:700;color:var(--muted);display:block;margin:8px 0 4px}
.float-panel select,.float-panel input[type=text],.float-panel input[type=number]{width:100%;border:1px solid var(--line);border-radius:8px;padding:8px;font-size:14px;font-family:inherit}
.float-panel textarea{width:100%;min-height:74px;border:1px solid var(--brand);border-radius:8px;padding:8px;font-size:15px;font-family:inherit;resize:vertical}
.float-panel .row{display:flex;gap:8px;align-items:center}
.float-panel .row>*{flex:1}
.fp-actions{display:flex;gap:8px;margin-top:12px}
.fp-actions .btn{flex:1;padding:10px}
.suggest-note{font-size:12px;color:var(--green-d);background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;padding:6px 10px;margin-top:8px}

/* ---------- side context panel ---------- */
.side h3{font-size:14px;margin-bottom:10px}
.side .opt{margin-bottom:14px}
.side label{font-size:12.5px;font-weight:700;color:var(--muted);display:block;margin-bottom:6px}
.side select,.side input[type=text],.side input[type=number]{width:100%;border:1px solid var(--line);border-radius:8px;padding:8px;font-size:14px}
.kind-row{display:flex;gap:6px;flex-wrap:wrap}
.kind-row .btn{flex:1;min-width:60px;padding:8px 4px;font-size:13px}
.kind-row .btn.active{background:var(--soft);border-color:var(--brand);color:var(--brand-d)}
.color-row{display:flex;gap:8px;align-items:center}
.color-row input[type=color]{width:44px;height:36px;border:1px solid var(--line);border-radius:8px;padding:2px;background:#fff;cursor:pointer}
.honest-note{font-size:12.5px;color:#92400e;background:#fef3c7;border:1px solid #fde68a;border-radius:8px;padding:8px 10px;line-height:1.5}
.tip{font-size:12.5px;color:var(--muted);line-height:1.5}
.seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg button{flex:1;border:none;background:#fff;padding:9px 4px;font-size:13px;font-weight:600;cursor:pointer}
.seg button.active{background:var(--brand);color:#fff}
.find-result{border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:13px;margin-bottom:6px;cursor:pointer}
.find-result:hover{border-color:var(--brand)}
.find-result .pg{font-weight:700;color:var(--brand-d)}
.sig-preview{border:1px dashed var(--line);border-radius:8px;min-height:70px;display:flex;align-items:center;justify-content:center;background:#fafbfc;margin-bottom:10px}
.sig-preview img{max-width:100%;max-height:90px}

/* ---------- signature modal ---------- */
.modal-back{position:fixed;inset:0;background:rgba(15,23,42,.5);z-index:100;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{background:#fff;border-radius:16px;padding:22px;width:440px;max-width:100%}
.modal h3{margin-bottom:4px}
.modal .sub{font-size:13px;color:var(--muted);margin-bottom:12px}
.sig-tabs{display:flex;gap:8px;margin-bottom:12px}
#sigCanvas{width:100%;height:170px;border:1.5px dashed #c7d2fe;border-radius:10px;touch-action:none;cursor:crosshair;background:#fff}
#sigType{width:100%;font-size:34px;padding:16px;border:1.5px dashed #c7d2fe;border-radius:10px;text-align:center;font-family:"Brush Script MT","Segoe Script",cursive}
.modal .m-actions{display:flex;gap:8px;margin-top:14px}
.modal .m-actions .btn{flex:1;padding:11px}

/* ---------- upload overlay ---------- */
.upload-overlay{position:fixed;inset:0;background:var(--bg);z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}
.upload-card{background:#fff;border-radius:20px;padding:44px 36px;max-width:520px;width:100%;text-align:center;box-shadow:0 10px 40px rgba(15,23,42,.12)}
.upload-card h1{font-size:28px;letter-spacing:-.6px;margin-bottom:8px}
.upload-card p{color:var(--muted);margin-bottom:22px}
.upload-card .dropzone{border:2.5px dashed #c7d2fe;border-radius:14px;padding:40px 20px;cursor:pointer}
.upload-card .dropzone:hover{border-color:var(--brand);background:#f5f3ff}
.upload-card .privacy-line{margin-top:16px;font-size:13px;color:var(--muted)}
.upload-card .privacy-line b{color:var(--green-d)}
.loading{position:fixed;inset:0;background:rgba(248,250,252,.9);z-index:300;display:flex;flex-direction:column;gap:14px;align-items:center;justify-content:center;font-weight:600;color:var(--muted)}
.spinner{width:42px;height:42px;border:4px solid #c7d2fe;border-top-color:var(--brand);border-radius:50%;animation:spin 0.8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
[hidden]{display:none!important}

/* toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:14px;font-weight:600;border-radius:999px;padding:10px 22px;z-index:400;opacity:0;pointer-events:none;transition:opacity .2s}
.toast.show{opacity:1}

/* ---------- mobile ---------- */
@media (max-width:820px){
  .layout{flex-direction:column;height:calc(100% - 58px)}
  .toolbar{position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);border-bottom:none;padding:10px 8px calc(10px + env(safe-area-inset-bottom));overflow-x:auto}
  .tool-btn{min-width:66px;padding:10px 4px}
  .tool-btn .t-name{font-size:11px}
  .rail{width:100%;flex:none;flex-direction:row;border-right:none;border-bottom:1px solid var(--line);padding:8px;overflow-x:auto;overflow-y:hidden;order:-1}
  .thumb{width:88px}
  .thumb .t-actions{display:flex}
  .side{position:fixed;left:0;right:0;bottom:0;z-index:70;max-height:55vh;border-left:none;border-top:1px solid var(--line);border-radius:16px 16px 0 0;box-shadow:0 -8px 30px rgba(15,23,42,.2);padding:16px 16px calc(16px + env(safe-area-inset-bottom))}
  .side:empty{display:none}
  .stage{padding:12px 12px 110px}
  .topbar .filename{display:none}
  .btn.download{padding:8px 14px;font-size:14px}
  .float-panel{position:fixed;left:12px!important;right:12px;bottom:12px;top:auto!important;width:auto;max-height:60vh;overflow-y:auto;z-index:80}
  .side-x{display:flex;align-items:center;justify-content:center;position:absolute;top:10px;right:12px;width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:20px;line-height:1;color:#475569;cursor:pointer}
}