/* PDF Editor Pro - style.css */
:root{--bg:#fff;--bg2:#f5f5f5;--sidebar:#f0f0f0;--text:#1a1a1a;--text2:#555;--border:#ddd;--accent:#4a90e2;--accent2:#357abd;--ok:#28a745;--ok2:#218838;--err:#dc3545;--shadow:rgba(0,0,0,.1);--canvas:#e0e0e0;--inp:#fff}
body.dark-theme{--bg:#1e1e1e;--bg2:#2d2d2d;--sidebar:#252525;--text:#f0f0f0;--text2:#aaa;--border:#444;--accent:#5ba3f5;--accent2:#4a90e2;--ok:#34ce57;--ok2:#28a745;--err:#ff6b7a;--shadow:rgba(0,0,0,.4);--canvas:#333;--inp:#3a3a3a}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Segoe UI',system-ui,sans-serif;background:var(--bg2);color:var(--text);transition:background .3s,color .3s;min-height:100vh}
.header{display:flex;justify-content:space-between;align-items:center;padding:12px 24px;background:var(--bg);border-bottom:1px solid var(--border);box-shadow:0 2px 4px var(--shadow);position:sticky;top:0;z-index:100}
.header-left{display:flex;align-items:baseline;gap:12px}
.logo{font-size:1.4rem;font-weight:700;color:var(--accent)}
.tagline{font-size:.85rem;color:var(--text2)}
.header-right{display:flex;gap:8px;align-items:center}
.btn{padding:8px 16px;border:1px solid var(--border);border-radius:6px;cursor:pointer;font-size:.875rem;font-weight:500;background:var(--bg);color:var(--text);transition:all .2s;white-space:nowrap}
.btn:hover{background:var(--bg2)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-primary:hover{background:var(--accent2)}
.btn-success{background:var(--ok);color:#fff;border-color:var(--ok);width:100%;margin-bottom:6px}
.btn-success:hover{background:var(--ok2)}
.btn-secondary{background:var(--bg2)}
.btn-icon{padding:8px 12px}
.ad-placeholder{background:var(--bg2);border:1px dashed var(--border);text-align:center;color:var(--text2);font-size:.75rem;padding:8px;min-height:60px;display:flex;align-items:center;justify-content:center}
.upload-section{max-width:640px;margin:60px auto;padding:0 16px}
.upload-box{background:var(--bg);border:2px dashed var(--border);border-radius:16px;padding:60px 40px;text-align:center;cursor:pointer;transition:border-color .2s,background .2s}
.upload-box:hover,.upload-box.dragover{border-color:var(--accent);background:var(--bg2)}
.upload-icon{font-size:3rem;margin-bottom:16px}
.upload-box h2{margin-bottom:8px;font-size:1.5rem}
.upload-box p{color:var(--text2);margin-bottom:8px}
.file-limit{font-size:.8rem}
.upload-box .btn-primary{margin-top:20px;padding:12px 32px;font-size:1rem}
.upload-progress{margin-top:16px}
.progress-bar{background:var(--border);border-radius:8px;height:8px;overflow:hidden;margin-bottom:8px}
.progress-fill{background:var(--accent);height:100%;width:0%;transition:width .3s}
#progressText{font-size:.875rem;color:var(--text2)}
.error-message{background:#fff0f0;border:1px solid var(--err);color:var(--err);border-radius:8px;padding:12px 16px;margin-top:12px;font-size:.875rem}
body.dark-theme .error-message{background:#3a1a1a}
.editor-section{padding:0}
.editor-layout{display:flex;height:calc(100vh - 120px)}
.toolbar{width:210px;min-width:190px;background:var(--sidebar);border-right:1px solid var(--border);padding:16px 12px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}
.tool-group{display:flex;flex-direction:column;gap:6px}
.tool-group h3{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text2);margin-bottom:4px}
.tool-btn{display:flex;align-items:center;gap:8px;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:8px;cursor:pointer;font-size:.875rem;color:var(--text);transition:all .2s;text-align:left;width:100%}
.tool-btn:hover{background:var(--bg2);border-color:var(--accent)}
.tool-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.tool-options{display:flex;flex-direction:column;gap:8px;padding:10px;background:var(--bg);border:1px solid var(--border);border-radius:8px;font-size:.85rem}
.tool-options h4{font-size:.75rem;color:var(--text2);text-transform:uppercase;margin-bottom:2px}
.tool-options label{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.mode-toggle,.shape-toggle{display:flex;gap:4px}
.mode-btn,.shape-btn{flex:1;padding:5px 4px;font-size:.75rem;border:1px solid var(--border);background:var(--bg2);border-radius:4px;cursor:pointer;color:var(--text)}
.mode-btn.active,.shape-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.size-btns{display:flex;gap:4px}
.size-btn{flex:1;padding:6px;font-size:.8rem;border:1px solid var(--border);background:var(--bg2);border-radius:4px;cursor:pointer;color:var(--text)}
.size-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.color-picker-wrap{display:flex;align-items:center;gap:8px}
.color-preview{display:inline-block;width:24px;height:24px;border-radius:4px;border:1px solid var(--border);vertical-align:middle}
.input-sm{width:70px;padding:4px 6px;border:1px solid var(--border);border-radius:4px;background:var(--inp);color:var(--text);font-size:.85rem}
.canvas-area{flex:1;background:var(--canvas);overflow:auto;display:flex;flex-direction:column;align-items:center;padding:24px 16px;gap:16px}
.page-container{position:relative;display:flex;flex-direction:column;gap:24px;align-items:center}
.pdf-page-wrapper{position:relative;background:#fff;box-shadow:0 4px 16px var(--shadow)}
.pdf-page-wrapper canvas{display:block}
.annotation-canvas{position:absolute;top:0;left:0;cursor:crosshair}
.page-nav{display:flex;align-items:center;gap:16px;padding:12px;background:var(--bg);border-radius:8px;box-shadow:0 2px 8px var(--shadow);position:sticky;bottom:16px}
#pageInfo{min-width:100px;text-align:center;font-size:.875rem;color:var(--text2)}
.text-box{position:absolute;cursor:move;min-width:50px;min-height:24px;user-select:none}
.text-box-border{border:1px dashed var(--accent);padding:2px 4px;width:100%;min-height:100%;outline:none}
.delete-text-btn{position:absolute;top:-10px;right:-10px;background:var(--err);color:#fff;border:none;border-radius:50%;width:18px;height:18px;font-size:10px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:200;display:flex;align-items:center;justify-content:center}
.modal-content{background:var(--bg);border-radius:16px;padding:32px;max-width:600px;width:95vw;box-shadow:0 8px 32px rgba(0,0,0,.3)}
.modal-content h2{margin-bottom:16px}
.modal-actions{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}
.merge-list{min-height:60px;border:1px solid var(--border);border-radius:8px;padding:8px;margin-bottom:12px}
.merge-item{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;background:var(--bg2);border-radius:6px;margin-bottom:6px;cursor:grab}
.footer{text-align:center;padding:24px;color:var(--text2);font-size:.85rem;border-top:1px solid var(--border);margin-top:0}
.hidden{display:none!important}
@media(max-width:768px){.editor-layout{flex-direction:column;height:auto}.toolbar{width:100%;min-width:unset;flex-direction:row;flex-wrap:wrap;height:auto;padding:8px;gap:8px}.tool-group{flex-direction:row;flex-wrap:wrap}.tool-options{width:100%}.canvas-area{min-height:400px}.header{padding:8px 12px}.logo{font-size:1.1rem}}