/* ============================================================================
 *  style.css — Assam Converter · PDF Editor (Sejda-style app)
 * ========================================================================== */
:root{
  --paper:#f5f1e8; --paper-2:#ece5d6; --card:#fffdf8; --surface:#faf6ec; --surface-2:#f1ebdd;
  --ink:#171511; --ink-2:#403a32; --ink-3:#6f675b; --ink-4:#a39a89;
  --line:#e4ddcc; --line-2:#d5ccb6;
  --accent:#d94f1e; --accent-2:#b8401a; --accent-soft:rgba(217,79,30,.10); --accent-glow:rgba(217,79,30,.30);
  --teal:#0e7c6f; --go:#16a34a; --go-2:#13883d;
  --r:12px; --pill:999px; --t:.16s cubic-bezier(.4,0,.2,1);
  --serif:'Fraunces',Georgia,serif; --sans:'Inter',system-ui,sans-serif; --mono:'JetBrains Mono',monospace;
  --sh-sm:0 1px 3px rgba(23,21,17,.06),0 6px 16px -8px rgba(23,21,17,.10);
  --sh-md:0 8px 24px -8px rgba(23,21,17,.16),0 2px 8px rgba(23,21,17,.05);
  --sh-lg:0 30px 60px -20px rgba(23,21,17,.30);
  --bar-h:58px; --tb-h:54px;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body.app{background:var(--paper-2);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;line-height:1.5}
.hidden{display:none!important}
a{color:inherit}

/* ===== top brand bar ===== */
.appbar{position:sticky;top:0;z-index:60;height:var(--bar-h);background:var(--card);border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:1rem;padding:0 1rem;box-shadow:var(--sh-sm)}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;flex-shrink:0}
.brand-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#ef6a35,#b8401a);color:#fff;
  display:grid;place-items:center;font-size:1rem;box-shadow:inset 0 -2px 0 rgba(0,0,0,.18)}
.brand-txt{display:flex;flex-direction:column;line-height:1.1}
.brand-txt b{font-family:var(--serif);font-weight:600;font-size:1rem;letter-spacing:-.01em}
.brand-txt small{font-size:.66rem;color:var(--ink-3);font-family:var(--mono);text-transform:uppercase;letter-spacing:.1em}
.appbar-mid{flex:1;text-align:center;min-width:0}
.doc-name{font-size:.85rem;color:var(--ink-3);font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:inline-block;max-width:90%}
.appbar-right{display:flex;align-items:center;gap:.6rem;flex-shrink:0}

/* buttons */
.btn{border:none;cursor:pointer;font-family:inherit;font-weight:700;border-radius:var(--r);transition:var(--t);
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;white-space:nowrap}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn-ghost{background:var(--surface);color:var(--ink-2);border:1px solid var(--line-2);padding:.5rem .85rem;font-size:.84rem}
.btn-ghost:hover{border-color:var(--ink-3);color:var(--ink);background:var(--surface-2)}
.btn-ghost i{color:var(--accent)}
.btn-apply{background:linear-gradient(180deg,var(--go),var(--go-2));color:#fff;padding:.6rem 1.2rem;font-size:.9rem;
  box-shadow:0 8px 18px -7px rgba(22,163,74,.6)}
.btn-apply:hover{filter:brightness(1.05);transform:translateY(-1px)}
.btn-lg{padding:.85rem 1.5rem;font-size:1rem}

/* ===== tool toolbar ===== */
.toolbar{position:sticky;top:var(--bar-h);z-index:55;background:var(--surface);border-bottom:1px solid var(--line);
  box-shadow:var(--sh-sm)}
.tb-inner{display:flex;align-items:center;gap:.25rem;padding:.45rem .8rem;max-width:1100px;margin:0 auto;overflow-x:auto}
.tool{display:inline-flex;flex-direction:column;align-items:center;gap:2px;background:transparent;border:1px solid transparent;
  border-radius:10px;padding:.4rem .6rem;cursor:pointer;color:var(--ink-2);font-family:inherit;font-size:.66rem;font-weight:600;transition:var(--t);min-width:54px}
.tool i{font-size:.95rem;color:var(--ink-3);transition:var(--t)}
.tool:hover{background:var(--card);border-color:var(--line)}
.tool.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.tool.active i{color:var(--accent)}
.tb-spacer{flex:1;min-width:8px}
.tb-prop{display:inline-flex;align-items:center;gap:.4rem;font-size:.72rem;color:var(--ink-3);font-weight:600;padding:0 .3rem}
.tb-prop input[type=range]{width:74px;accent-color:var(--accent)}
.tb-prop input[type=color]{width:30px;height:28px;border:1px solid var(--line-2);border-radius:7px;padding:.1rem;cursor:pointer;background:var(--card)}
/* shapes split + menu */
.tool-split{position:relative;display:inline-flex;align-items:stretch}
.tool-caret{background:transparent;border:1px solid transparent;border-radius:8px;cursor:pointer;color:var(--ink-3);padding:0 .35rem;font-size:.7rem}
.tool-caret:hover{background:var(--card)}
.tool-menu{position:absolute;top:100%;left:0;margin-top:4px;background:var(--card);border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--sh-md);padding:.3rem;min-width:160px;z-index:70;display:none}
.tool-menu.open{display:block}
.tool-menu button{display:flex;align-items:center;gap:.6rem;width:100%;background:none;border:none;padding:.55rem .7rem;border-radius:8px;
  cursor:pointer;font-family:inherit;font-size:.85rem;color:var(--ink-2);text-align:left}
.tool-menu button:hover{background:var(--surface-2)}
.tool-menu button i{color:var(--accent);width:18px;text-align:center}

/* ===== upload view ===== */
.upload-view{min-height:calc(100vh - var(--bar-h) - var(--tb-h));display:flex;align-items:center;justify-content:center;padding:2rem 1.1rem;
  background-image:radial-gradient(900px 460px at 88% -10%,var(--accent-soft),transparent 60%),radial-gradient(700px 400px at -8% 110%,rgba(14,124,111,.05),transparent 60%)}
.uv-card{max-width:640px;width:100%;background:var(--card);border:1px solid var(--line);border-radius:24px;box-shadow:var(--sh-md);padding:2.4rem 2rem;text-align:center}
.kicker{font-family:var(--mono);font-size:.66rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);
  display:inline-flex;align-items:center;gap:.5rem;margin-bottom:.7rem}
.kicker::before{content:"";width:22px;height:1px;background:var(--accent);opacity:.5}
.uv-card h1{font-family:var(--serif);font-weight:500;font-size:clamp(1.9rem,4.6vw,2.7rem);letter-spacing:-.025em;line-height:1.05}
.uv-card h1 em{font-style:italic;color:var(--accent)}
.uv-card>p{color:var(--ink-3);font-size:1rem;margin:.6rem auto 1.6rem;max-width:52ch;text-wrap:pretty}
.dropzone{border:2px dashed var(--line-2);border-radius:18px;background:var(--surface);padding:2.6rem 1.2rem;text-align:center;cursor:pointer;transition:var(--t)}
.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:var(--accent-soft)}
.dropzone:focus-visible{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.dropzone i{font-size:2.4rem;color:var(--accent);margin-bottom:.7rem}
.dz-title{font-size:1.05rem;font-weight:600}.dz-title span{color:var(--accent);text-decoration:underline}
.dz-sub{font-size:.84rem;color:var(--ink-3);margin-top:.35rem}
.uv-feats{display:flex;gap:1.3rem;justify-content:center;margin-top:1.4rem;flex-wrap:wrap;color:var(--ink-3);font-size:.82rem;font-weight:600}
.uv-feats i{color:var(--teal);margin-right:.35rem}

/* ===== editor view ===== */
.editor-view{padding:1.4rem 1rem 5rem}
.pages-scroll{max-width:880px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:1.6rem}
.page-block{width:100%;display:flex;flex-direction:column;align-items:center}
.page-bar{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:820px;margin-bottom:.4rem;gap:1rem}
.pb-no{font-family:var(--mono);font-size:.74rem;font-weight:700;color:var(--ink-3)}
.pb-tools{display:flex;gap:.2rem}
.pb-btn{width:32px;height:32px;border:1px solid var(--line);background:var(--card);color:var(--ink-2);border-radius:8px;cursor:pointer;
  display:grid;place-items:center;font-size:.8rem;transition:var(--t)}
.pb-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.pb-btn.danger:hover{border-color:#c0392b;color:#c0392b;background:rgba(192,57,43,.08)}
.page-canvas-wrap{position:relative;background:#fff;box-shadow:var(--sh-md);border-radius:4px;overflow:hidden}
.page-canvas-wrap canvas{display:block}
.ov-layer{position:absolute;inset:0;cursor:default}
body[data-tool="text"] .ov-layer,body[data-tool="check"] .ov-layer,body[data-tool="edit"] .ov-layer{cursor:text}
body[data-tool="image"] .ov-layer,body[data-tool="sign"] .ov-layer{cursor:copy}
body[data-tool="whiteout"] .ov-layer,body[data-tool="rect"] .ov-layer,body[data-tool="ellipse"] .ov-layer,
body[data-tool="line"] .ov-layer,body[data-tool="draw"] .ov-layer{cursor:crosshair}

/* overlay elements */
.ov{position:absolute;box-sizing:border-box}
body[data-tool="select"] .ov{cursor:move}
.ov-text{font-family:var(--sans);font-weight:600;white-space:pre;line-height:1.15;padding:1px 2px;min-width:8px;min-height:1em}
.ov-image{background-size:contain;background-repeat:no-repeat;background-position:center}
.ov:hover{outline:1.5px dashed var(--accent);outline-offset:1px}
.ov.dragging{outline:1.5px solid var(--accent)}
.ov-del{position:absolute;top:-11px;right:-11px;width:20px;height:20px;background:#c0392b;color:#fff;border-radius:50%;
  display:none;place-items:center;font-size:.9rem;cursor:pointer;line-height:1;box-shadow:var(--sh-sm);z-index:5}
body[data-tool="select"] .ov:hover .ov-del{display:grid}
.ov-rz{position:absolute;bottom:-7px;right:-7px;width:14px;height:14px;background:var(--accent);border:2px solid #fff;border-radius:50%;
  cursor:nwse-resize;display:none;z-index:5}
body[data-tool="select"] .ov:hover .ov-rz{display:block}
.ov-edit{border:none;outline:1.5px solid var(--accent);background:rgba(255,255,255,.9);font-family:var(--sans);font-weight:600;
  resize:both;min-width:80px;min-height:1.6em;padding:1px 2px;line-height:1.15}

/* ===== result modal ===== */
.result-modal{position:fixed;inset:0;background:rgba(15,12,8,.6);backdrop-filter:blur(4px);z-index:200;display:flex;align-items:center;justify-content:center;padding:1.2rem}
.result-box{background:var(--card);border-radius:22px;max-width:460px;width:100%;padding:2.2rem 1.8rem;text-align:center;box-shadow:var(--sh-lg);animation:pop .3s cubic-bezier(.2,.8,.2,1)}
@keyframes pop{from{opacity:0;transform:translateY(20px) scale(.97)}to{opacity:1;transform:none}}
.result-check{font-size:3rem;color:var(--teal);margin-bottom:.5rem}
.result-box h2{font-family:var(--serif);font-weight:500;font-size:1.6rem;letter-spacing:-.02em;margin-bottom:.3rem}
.result-box #resultMeta{color:var(--ink-3);margin-bottom:1.4rem}
.result-actions{display:flex;gap:.7rem;justify-content:center;flex-wrap:wrap}

/* ===== loading + toast ===== */
.loading{position:fixed;inset:0;background:rgba(245,241,232,.85);backdrop-filter:blur(3px);z-index:300;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem}
.spinner{width:48px;height:48px;border:4px solid var(--line-2);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading p{color:var(--ink-2);font-weight:600}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--paper);
  padding:.8rem 1.3rem;border-radius:var(--pill);font-size:.9rem;font-weight:600;opacity:0;pointer-events:none;transition:.3s;z-index:400;box-shadow:var(--sh-lg);max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.ok{background:var(--teal)}.toast.err{background:#c0392b}

/* ===== responsive ===== */
@media(max-width:680px){
  .tool span{display:none}
  .tool{min-width:40px;padding:.45rem}
  .tool i{font-size:1.05rem}
  .tb-prop span{display:none}
  .tb-prop input[type=range]{width:54px}
  .brand-txt small{display:none}
  .appbar-mid{display:none}
  .btn-ghost span{display:none}
}