:root {
  --bg-base:#0F0F0F;
  --bg-sidebar:#1A1A1A;
  --bg-elevated:#2B2B2B;
  --bg-surface:#313131;
  --text-primary:#F5F5F5;
  --text-logo:#E0E0E0;
  --text-secondary:#ABABAB;
  --text-muted:#C4C4C4;
  --accent-blue:#196CF2;
  --accent-orange:#FF9200;
  --accent-orange-muted:#EA7E11;
  --border-subtle:rgba(255,255,255,0.10);
  --border-medium:rgba(255,255,255,0.20);
  --border-surface:#313131;
  --radius-sm:6px;
  --radius-md:8px;
  --radius-lg:16px;
  --radius-xl:20px;
  --radius-full:100px;
  --font-main:'Inter',sans-serif;
  --font-logo:'Roboto',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--font-main);background:var(--bg-base);color:var(--text-primary);min-height:100vh;display:flex}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}

.app{display:flex;min-height:100vh;width:100%}
.sidebar{width:240px;min-width:240px;background:var(--bg-sidebar);display:flex;flex-direction:column;height:100vh;position:sticky;top:0;border-right:1px solid var(--border-subtle);transition:width .18s ease,min-width .18s ease}
.sidebar-header{height:64px;min-height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid var(--border-subtle)}
.logo{font-family:var(--font-logo);font-weight:700;font-size:20px;color:var(--text-logo);flex:1;padding:0 8px;display:flex;align-items:center;gap:4px;overflow:hidden;white-space:nowrap}
.logo-mark,.logo-text{flex-shrink:0}
.sidebar-nav{flex:1;overflow-y:auto;overflow-x:hidden;padding:4px 16px;display:flex;flex-direction:column;gap:4px}
.sidebar-nav::-webkit-scrollbar{width:4px}
.sidebar-nav::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:4px}
.nav-section-label{font-size:12px;font-weight:600;color:var(--text-secondary);height:32px;display:flex;align-items:center}
.nav-divider{height:1px;background:var(--border-subtle);margin:4px 0}
.nav-item{display:flex;align-items:center;gap:4px;height:32px;border-radius:var(--radius-md);cursor:pointer;color:var(--text-primary);font-size:14px;transition:background .12s}
.nav-item:hover,.nav-item.active{background:var(--bg-elevated)}
.nav-icon{width:32px;height:32px;min-width:32px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary)}
.nav-icon svg{width:14px;height:14px}
.nav-item.active .nav-icon{color:var(--text-primary)}
.nav-label{font-size:14px;white-space:nowrap}
.sidebar-footer{padding:16px;display:flex;flex-direction:column;gap:16px;border-top:1px solid var(--border-subtle)}
.btn-login{background:var(--bg-elevated);border:none;border-radius:var(--radius-md);padding:8px 16px 9px;cursor:pointer;text-align:left;width:100%;display:block;transition:background .12s}
.btn-login:hover{background:#333}
.btn-login-title{display:block;font-size:14px;font-weight:600;color:var(--accent-orange);line-height:23px}
.btn-login-sub{display:block;font-size:14px;color:var(--text-primary);line-height:23px}
.footer-actions{display:flex;align-items:center;justify-content:space-between}
.footer-icons{display:flex;gap:8px}
.icon-btn{width:32px;height:32px;border-radius:var(--radius-md);border:none;background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:background .12s}
.icon-btn:hover{background:var(--bg-elevated)}
.icon-btn svg{width:14px;height:14px}
.footer-menu-wrap{position:relative}
.footer-menu{position:absolute;right:0;bottom:40px;width:220px;background:var(--bg-sidebar);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:8px;display:none;box-shadow:0 12px 30px rgba(0,0,0,.35);z-index:20}
.footer-menu.open{display:block}
.footer-menu-link{display:flex;align-items:center;min-height:36px;border-radius:var(--radius-sm);padding:0 10px;font-size:13px;color:var(--text-primary)}
.footer-menu-link:hover{background:var(--bg-elevated)}
.sidebar-toggle.collapsed svg{transform:scaleX(-1)}

.sidebar.collapsed{width:72px;min-width:72px}
.sidebar.collapsed .sidebar-header{padding:0 8px}
.sidebar.collapsed .logo{flex:0 0 32px;width:32px;padding:0;justify-content:center}
.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-label,
.sidebar.collapsed .nav-section-label,
.sidebar.collapsed .btn-login{display:none}
.sidebar.collapsed .sidebar-nav{padding:4px 8px}
.sidebar.collapsed .nav-item{justify-content:center}
.sidebar.collapsed .sidebar-footer{padding:12px 8px}
.sidebar.collapsed .footer-actions{justify-content:center}
.sidebar.collapsed .footer-icons{gap:4px}
.sidebar.collapsed .footer-menu-wrap{display:none}
.sidebar.collapsed .nav-divider{margin:6px 4px}

.main{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-base)}
.topbar{height:64px;min-height:64px;background:var(--bg-base);border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:space-between;padding:0 16px}
.breadcrumb{font-size:12px;color:var(--text-primary);padding:4px 8px}
.topbar-actions{display:flex;align-items:center;gap:12px}
.topbar-balance{display:inline-flex;align-items:center;justify-content:center;height:32px;padding:0 12px;border-radius:var(--radius-full);border:1px solid var(--border-subtle);background:rgba(255,255,255,.04);font-size:12px;font-weight:600;color:var(--text-primary)}
.topbar-balance:hover{background:var(--bg-elevated)}
.more-mobile-hub{display:none}
.more-mobile-links{display:flex;gap:2px;overflow-x:auto;padding:3px;background:var(--bg-base);border:1px solid var(--border-subtle);border-radius:var(--radius-full)}
.more-mobile-links::-webkit-scrollbar{display:none}
.more-mobile-link{height:32px;flex:0 0 auto;border-radius:var(--radius-full);padding:0 14px;display:flex;align-items:center;background:transparent;font-size:12px;font-weight:500;color:var(--text-secondary)}
.more-mobile-link.active{background:var(--bg-elevated);color:var(--text-primary)}
.pricing-btn{font-size:14px;font-weight:600;color:var(--accent-orange-muted);background:none;border:none;cursor:pointer}
.signin-btn,.btn-outline{font-size:12px;font-weight:500;color:var(--text-primary);background:none;border:1px solid var(--border-medium);border-radius:var(--radius-md);padding:0 17px;cursor:pointer;height:32px;display:flex;align-items:center}
.page-content{flex:1;overflow-y:auto;padding:32px 24px 48px}
.page-content::-webkit-scrollbar{width:4px}
.page-content::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:4px}
.page-head{margin-bottom:24px}
.page-title{font-size:32px;font-weight:700;color:var(--text-primary);margin-bottom:10px;letter-spacing:-.5px}
.page-sub{font-size:15px;color:var(--text-secondary);line-height:1.6;max-width:760px}
.cards-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.panel{background:var(--bg-sidebar);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:20px}
.panel-title{font-size:18px;font-weight:600;margin-bottom:8px}
.panel-sub{font-size:13px;color:var(--text-secondary);line-height:1.6;margin-bottom:16px}
.note-box{background:var(--bg-elevated);border-radius:var(--radius-md);padding:14px 16px;font-size:13px;color:var(--text-secondary);line-height:1.6}
.mini-stat{background:var(--bg-sidebar);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:18px}
.mini-stat-label{font-size:12px;color:var(--text-secondary);margin-bottom:10px}
.mini-stat-value{font-size:28px;font-weight:700;color:var(--text-primary);font-family:var(--font-logo);margin-bottom:6px}
.mini-stat-note{font-size:12px;color:var(--text-secondary);line-height:1.5}
.simple-table{width:100%;border-collapse:collapse}
.simple-table th{font-size:11px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.4px;text-align:left;padding-bottom:10px;border-bottom:1px solid var(--border-subtle)}
.simple-table td{font-size:13px;color:var(--text-primary);padding:12px 0;border-bottom:1px solid var(--border-subtle);vertical-align:top}
.simple-table tr:last-child td{border-bottom:none}
.muted{color:var(--text-secondary)}
.stack{display:flex;flex-direction:column;gap:16px}
.list{display:flex;flex-direction:column;gap:10px}
.list-item{padding:14px 16px;border-radius:var(--radius-md);background:rgba(255,255,255,.03);border:1px solid transparent}
.list-item:hover{border-color:var(--border-subtle)}
.list-title{font-size:14px;font-weight:600}
.list-copy{font-size:12px;color:var(--text-secondary);margin-top:5px;line-height:1.5}
.section-links{display:flex;flex-wrap:wrap;gap:8px}
.tag{padding:6px 16px;border-radius:var(--radius-sm);font-size:12px;font-weight:500;border:none;background:transparent;border:1px solid var(--border-surface);color:var(--text-primary)}
.tag.active{background:var(--bg-surface);border-color:var(--bg-surface)}
.tool-switch{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.tool-switch-link{display:flex;align-items:center;justify-content:center;min-height:32px;padding:0 14px;border-radius:var(--radius-full);border:1px solid var(--border-subtle);font-size:12px;font-weight:500;color:var(--text-secondary);background:transparent}
.tool-switch-link.active{background:var(--bg-elevated);color:var(--text-primary);border-color:var(--border-subtle)}
.form-stack{display:flex;flex-direction:column;gap:16px}
.field-label{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.4px}
.input-like,.upload-box,.result-box{background:var(--bg-sidebar);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:20px}
.upload-box{min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center}
.upload-box-copy{font-size:13px;color:var(--text-secondary);line-height:1.6;max-width:340px}
.result-box{min-height:220px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:13px}
.action-row{display:flex;gap:12px;flex-wrap:wrap}
.text-input{width:100%;height:40px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:rgba(255,255,255,.03);color:var(--text-primary);padding:0 14px}
.text-input::placeholder{color:var(--text-secondary)}

@media (max-width: 1100px){
  .cards-2,.cards-3{grid-template-columns:1fr}
}

@media (max-width: 820px){
  html,body{height:100%;min-height:100%;overscroll-behavior-y:none}
  body{min-height:100svh}
  .app{display:block;min-height:100svh}
  .sidebar{
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    top:auto;
    width:100%;
    min-width:100%;
    height:auto;
    border-right:none;
    border-top:1px solid var(--border-subtle);
    z-index:40;
  }
  .sidebar-header,.sidebar-footer,.nav-section-label,.nav-divider{display:none}
  .sidebar-nav{
    display:grid;
    grid-template-columns:repeat(5,minmax(0,1fr));
    gap:6px;
    padding:8px 12px calc(8px + env(safe-area-inset-bottom));
    overflow:visible;
  }
  .sidebar-nav::-webkit-scrollbar{display:none}
  .nav-item{
    min-width:0;
    height:56px;
    flex-direction:column;
    justify-content:center;
    gap:4px;
    text-align:center;
  }
  .nav-label{font-size:11px;line-height:1.2;white-space:normal}
  .nav-icon{width:24px;height:20px;min-width:24px}
  .sidebar-nav .nav-item[href="artpik-balance.html"],
  .sidebar-nav .nav-item[href="artpik-pricing.html"],
  .sidebar-nav .nav-item[href="artpik-kb.html"]{display:none}
  .sidebar:has(.nav-item.active[href="artpik-balance.html"]) .sidebar-nav .nav-item[href="artpik-settings.html"],
  .sidebar:has(.nav-item.active[href="artpik-pricing.html"]) .sidebar-nav .nav-item[href="artpik-settings.html"],
  .sidebar:has(.nav-item.active[href="artpik-kb.html"]) .sidebar-nav .nav-item[href="artpik-settings.html"]{background:var(--bg-elevated)}
  .sidebar:has(.nav-item.active[href="artpik-balance.html"]) .sidebar-nav .nav-item[href="artpik-settings.html"] .nav-icon,
  .sidebar:has(.nav-item.active[href="artpik-pricing.html"]) .sidebar-nav .nav-item[href="artpik-settings.html"] .nav-icon,
  .sidebar:has(.nav-item.active[href="artpik-kb.html"]) .sidebar-nav .nav-item[href="artpik-settings.html"] .nav-icon{color:var(--text-primary)}
  .sidebar-nav .nav-item[href="artpik-settings.html"] .nav-label{font-size:0}
  .sidebar-nav .nav-item[href="artpik-settings.html"] .nav-label::after{content:"Ещё";font-size:11px;line-height:1.2;color:var(--text-primary)}
  .main{
    min-height:100svh;
    padding-bottom:calc(82px + env(safe-area-inset-bottom));
  }
  .topbar{
    position:sticky;
    top:0;
    z-index:20;
    padding:calc(env(safe-area-inset-top) + 10px) 16px 10px;
    min-height:calc(56px + env(safe-area-inset-top));
    height:auto;
    align-items:flex-end;
    background:rgba(15,15,15,.96);
    backdrop-filter:blur(18px);
  }
  .breadcrumb{font-size:18px;font-weight:700;line-height:1.2;padding:0}
  .topbar-balance{height:32px;padding:0 12px;font-size:12px}
  .more-mobile-hub{display:block;margin-bottom:16px}
  .page-content{
    padding:20px 16px calc(28px + env(safe-area-inset-bottom));
  }
  .page-head{margin-bottom:20px}
}