*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--sidebar:240px;--bg:#fff;--bg2:#f7f7f5;--bg3:#f0f0ed;--text:#1a1a1a;--text2:#6b6b6b;--muted:#999;--border:#c0c0bb;--border2:#a8a8a2;--accent:#2563eb;--success:#16a34a;--success-bg:#dcfce7;--danger:#dc2626;--danger-bg:#fee2e2;--r:8px;--rl:12px}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:15px;line-height:1.6;color:var(--text);background:var(--bg2)}
a{color:inherit;text-decoration:none}
input,textarea,select,button{font-family:inherit;font-size:14px}
img{max-width:100%;height:auto}

/* Auth */
.auth-body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg2);padding:24px}
.auth-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--rl);padding:40px;width:100%;max-width:380px}
.auth-logo{font-size:20px;font-weight:700;margin-bottom:24px}
.auth-title{font-size:22px;font-weight:600;margin-bottom:24px}
.auth-links{margin-top:16px;font-size:13px;text-align:center;color:var(--text2)}
.auth-links a{color:var(--accent)}

/* Layout */
.app-body{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar);min-width:var(--sidebar);background:var(--bg);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;overflow-y:auto;z-index:100}
.sidebar-brand{padding:20px 18px 16px;font-size:18px;font-weight:700;border-bottom:1px solid var(--border)}
.sidebar-user{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--border)}
.user-avatar{width:34px;height:34px;min-width:34px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600}
.user-info{overflow:hidden}
.user-name{font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user-email{font-size:11px;color:var(--text2)}
.sidebar-nav{flex:1;padding:8px}
.nav-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:var(--r);font-size:14px;color:var(--text2);cursor:pointer;border:none;background:none;width:100%;text-align:left;transition:all .15s}
.nav-item:hover{background:var(--border);color:var(--text)}
.nav-item.active{background:var(--bg3);color:var(--text);font-weight:500}
.sidebar-footer{padding:8px;border-top:1px solid var(--border)}
.nav-logout{color:var(--muted)}
.main-content{flex:1;margin-left:var(--sidebar);padding:32px;min-height:100vh}

/* Forms */
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;font-weight:500;color:var(--text2);margin-bottom:6px}
.form-group .hint{font-weight:400;color:var(--muted)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
input[type=text],input[type=email],input[type=password],input[type=number],textarea,select{width:100%;padding:9px 12px;border:1px solid var(--border2);border-radius:var(--r);background:var(--bg);color:var(--text);font-size:14px;outline:none;transition:border-color .15s,box-shadow .15s}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
textarea{resize:vertical;min-height:80px}
.form-actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.form-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--rl);padding:24px}

/* Buttons */
.btn-primary,.btn-secondary,.btn-danger,.btn-sm,.btn-ai{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border-radius:var(--r);font-size:14px;font-weight:500;cursor:pointer;border:1px solid transparent;transition:all .15s;white-space:nowrap}
.btn-primary{background:var(--text);color:var(--bg);border-color:var(--text)}
.btn-primary:hover{background:#333}
.btn-secondary{background:var(--bg);color:var(--text);border-color:var(--border2)}
.btn-secondary:hover{background:var(--bg2)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#b91c1c}
.btn-sm{padding:5px 12px;font-size:13px}
.btn-sm.btn-danger{background:transparent;color:var(--danger);border-color:var(--border)}
.btn-sm.btn-danger:hover{background:var(--danger-bg)}
.btn-ai{background:#7c3aed;color:#fff;border-color:#7c3aed}
.btn-ai:hover{background:#6d28d9}
.btn-lg{padding:12px 28px;font-size:16px}
.btn-full{width:100%;justify-content:center}

/* Alerts */
.alert{padding:12px 16px;border-radius:var(--r);font-size:14px;margin-bottom:16px}
.alert-error{background:var(--danger-bg);color:var(--danger)}
.alert-success{background:var(--success-bg);color:var(--success)}
.flash{padding:12px 16px;border-radius:var(--r);font-size:14px;margin-bottom:20px}
.flash-success{background:var(--success-bg);color:var(--success)}
.flash-error{background:var(--danger-bg);color:var(--danger)}

/* Page elements */
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.page-title{font-size:24px;font-weight:700}
.empty-state{text-align:center;padding:80px 20px;color:var(--text2)}

/* Books grid */
.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.book-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--rl);padding:20px;display:flex;flex-direction:column;gap:12px;transition:box-shadow .15s}
.book-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.08)}
.book-card-icon{font-size:36px}
.book-card-title{font-size:18px;font-weight:600;margin-bottom:4px}
.book-card-topic{font-size:13px;color:var(--text2);line-height:1.5}
.book-card-meta{font-size:12px;color:var(--muted)}
.book-card-actions{display:flex;gap:8px;margin-top:auto}

/* Book header */
.book-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:24px;gap:16px;flex-wrap:wrap}
.book-topic{color:var(--text2);font-size:14px;margin-top:4px}

/* Generate panel */
.generate-panel{text-align:center;padding:80px 32px;background:var(--bg);border:2px dashed var(--border2);border-radius:var(--rl)}
.generate-panel-icon{font-size:64px;margin-bottom:16px}
.generate-panel h2{font-size:22px;font-weight:600;margin-bottom:8px}
.generate-panel p{color:var(--text2);margin-bottom:24px}

/* Board */
.board-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:12px}
.board-title{font-size:18px;font-weight:600}
.chapter-count{font-size:14px;color:var(--muted);font-weight:400;margin-left:8px}
.board-wrap{display:flex;flex-direction:column;gap:16px}
.board{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}

/* Chapter cards */
.chapter-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--rl);padding:16px;display:flex;gap:10px;align-items:flex-start;transition:box-shadow .15s;cursor:grab}
.chapter-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.08)}
.chapter-card-ghost{opacity:.4;background:var(--bg3)}
.chapter-card-drag{color:var(--muted);font-size:18px;cursor:grab;user-select:none;line-height:1}
.chapter-card-num{min-width:24px;width:24px;height:24px;background:var(--accent);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.chapter-card-body{flex:1;min-width:0}
.chapter-card-title{font-size:14px;font-weight:600;margin-bottom:6px;color:var(--text)}
.chapter-card-summary{font-size:13px;color:var(--text2);line-height:1.5;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.chapter-card-actions{display:flex;flex-direction:column;gap:4px;flex-shrink:0}
.card-btn{width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--text2);cursor:pointer;font-size:13px;transition:all .15s}
.card-btn:hover{background:var(--bg2)}
.card-btn-danger:hover{background:var(--danger-bg);color:var(--danger)}

/* Trash zone */
.trash-zone{border:2px dashed var(--danger);border-radius:var(--rl);padding:20px;text-align:center;color:var(--danger);font-size:14px;min-height:60px;transition:background .15s}
.trash-zone.sortable-over{background:var(--danger-bg)}

/* Chapter editor */
.chapter-editor{display:flex;height:calc(100vh - 64px);margin:-32px;overflow:hidden}
.chapter-sidebar{width:220px;min-width:220px;background:var(--bg);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto;padding:16px}
.back-link{font-size:13px;color:var(--text2);display:block;margin-bottom:16px}
.back-link:hover{color:var(--text)}
.chapter-list{display:flex;flex-direction:column;gap:2px}
.chapter-list-item{display:block;padding:7px 10px;font-size:13px;color:var(--text2);border-radius:var(--r);border-left:2px solid transparent;transition:all .15s}
.chapter-list-item:hover{background:var(--bg3);color:var(--text)}
.chapter-list-item.active{background:var(--bg3);color:var(--text);font-weight:500;border-left-color:var(--accent)}
.ch-num{font-size:11px;color:var(--muted);margin-right:4px}
.chapter-main{flex:1;display:flex;flex-direction:column;overflow:hidden}
.chapter-toolbar{display:flex;align-items:center;gap:6px;padding:10px 20px;background:var(--bg);border-bottom:1px solid var(--border);flex-wrap:wrap}
.toolbar-btn{padding:6px 12px;font-size:13px;border:1px solid var(--border2);border-radius:var(--r);background:transparent;color:var(--text2);cursor:pointer;transition:all .15s}
.toolbar-btn:hover{background:var(--bg2);color:var(--text)}
.btn-ai.toolbar-btn{background:#7c3aed;color:#fff;border-color:#7c3aed}
.btn-ai.toolbar-btn:hover{background:#6d28d9}
.chapter-content{flex:1;overflow-y:auto;padding:32px 40px;max-width:760px;margin:0 auto;width:100%}
.chapter-title-display{font-size:26px;font-weight:700;margin-bottom:8px}
.chapter-summary-display{font-size:14px;color:var(--text2);margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--border)}

/* Blocks */
.block-item{position:relative;padding:8px 12px 8px 40px;border:1px solid transparent;border-radius:var(--r);margin-bottom:8px;transition:border-color .15s}
.block-item:hover{border-color:var(--border)}
.block-controls{position:absolute;left:8px;top:10px;display:flex;flex-direction:column;gap:2px;opacity:0;transition:opacity .15s}
.block-item:hover .block-controls{opacity:1}
.block-ctrl{width:22px;height:22px;display:flex;align-items:center;justify-content:center;border-radius:4px;cursor:pointer;border:1px solid var(--border);background:var(--bg);color:var(--muted);font-size:12px;padding:0;transition:all .15s}
.block-ctrl:hover{background:var(--bg2)}
.block-ctrl-danger:hover{background:var(--danger-bg);color:var(--danger)}
.block-tag{display:inline-block;font-size:11px;color:var(--muted);margin-bottom:4px;text-transform:uppercase;letter-spacing:.04em}
.block-heading-input{font-size:20px;font-weight:700;border:none;outline:none;width:100%;background:transparent;padding:0}
.block-subheading-input{font-size:16px;font-weight:600;border:none;outline:none;width:100%;background:transparent;padding:0}
.block-text-input{border:none;outline:none;width:100%;background:transparent;padding:0;resize:none;line-height:1.8;color:var(--text)}
.block-alt-input{margin-top:6px;font-size:13px;color:var(--text2);border:none;outline:none;width:100%;background:transparent;border-bottom:1px dashed var(--border)}
.block-ai-bar{display:flex;gap:8px;margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}
.ai-instruction{flex:1;font-size:13px;border:1px solid var(--border);border-radius:var(--r);padding:6px 10px}
.btn-ai-sm{padding:5px 12px;font-size:12px;background:#7c3aed;color:#fff;border:none;border-radius:var(--r);cursor:pointer}
.btn-ai-sm:hover{background:#6d28d9}
.image-upload-area{border:2px dashed var(--border2);border-radius:var(--r);padding:20px;text-align:center;cursor:pointer;transition:all .15s}
.image-upload-area:hover{border-color:var(--accent);background:#eff6ff}
.image-placeholder{font-size:14px;color:var(--muted)}
.add-block-hint{text-align:center;padding:32px;border:2px dashed var(--border);border-radius:var(--r);color:var(--muted);font-size:14px;margin-top:16px}

/* Title suggestions */
.title-suggestion{padding:10px 14px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);cursor:pointer;font-size:14px;margin-bottom:6px;transition:all .15s}
.title-suggestion:hover{background:var(--bg3);border-color:var(--accent)}

@media(max-width:768px){
    .sidebar{display:none}
    .main-content{margin-left:0;padding:16px}
    .chapter-editor{flex-direction:column;height:auto;margin:-16px}
    .chapter-sidebar{width:100%;height:auto}
    .form-row{grid-template-columns:1fr}
    .books-grid{grid-template-columns:1fr}
}
Sun Sep  6 06:57:47 PM MSK 2026