*,*::before,*::after{box-sizing:border-box}
        :root{
            --bg:#f5f7fa;--text:#2c3e50;--box-bg:#ffffff;--box-border:#e4e4e4;
            --sidebar-settings-width:300px;--sidebar-icons-width:90px;
            --sidebar-gap:15px;--sidebar-radius:12px
        }
        body.dark{
            --bg:#1f1f22;--text:#f1f1f1;--box-bg:#26272a;--box-border:#3a3a3c
        }
        body{
            margin:0;padding:0;background:var(--bg);color:var(--text);
            font-family:'IRAN Yekan','IranYekan','Segoe UI',Tahoma,Geneva,Verdana,sans-serif;
            transition:background-color 0.3s,color 0.3s;
            background-image:radial-gradient(circle,rgba(44,62,80,0.12) 1px,transparent 1px);
            background-size:20px 20px
        }
        body.dark{background-image:radial-gradient(circle,rgba(241,241,241,0.08) 1px,transparent 1px)}
        .app-container{display:flex;min-height:100vh;max-width:100%;margin:0 auto;position:relative}
        .main-wrapper{
            flex:1;margin-right:calc(var(--sidebar-settings-width) + var(--sidebar-icons-width) + var(--sidebar-gap)*3);
            padding:0 20px;width:100%;min-width:0
        }
        .right-sidebar-settings{
            width:var(--sidebar-settings-width);background:var(--box-bg);border:1px solid var(--box-border);
            border-radius:var(--sidebar-radius);position:fixed;
            right:calc(var(--sidebar-icons-width) + var(--sidebar-gap)*2);top:var(--sidebar-gap);
            height:calc(100vh - var(--sidebar-gap)*2);overflow-y:auto;z-index:1000;
            display:flex;flex-direction:column
        }
        .settings-header{padding:20px 18px;border-bottom:1px solid var(--box-border);text-align:center}
        .settings-header h3{margin:0;font-size:16px;display:flex;align-items:center;justify-content:center;gap:10px}
        .settings-content{padding:10px;flex:1;display:flex;flex-direction:column}
        .sidebar-download-btn{
            width:100%;display:flex;align-items:center;justify-content:center;gap:10px;padding:12px;
            background:#10b981;color:white;border:none;border-radius:8px;font-size:14px;font-weight:600;
            cursor:pointer;transition:all 0.3s
        }
        .sidebar-download-btn:hover{background:#059669;transform:scale(1.02)}
        .sidebar-download-btn svg{width:16px;height:16px;stroke:white}
        .sidebar-reset-btn{
            width:100%;display:flex;align-items:center;justify-content:center;gap:10px;padding:11px;
            background:transparent;color:var(--text);border:1px solid var(--box-border);border-radius:8px;
            font-size:13px;font-weight:500;cursor:pointer;transition:all 0.3s;margin-top:10px
        }
        .sidebar-reset-btn:hover{background:#ef4444;color:white;border-color:#ef4444}
        .sidebar-reset-btn svg{width:15px;height:15px}
        .right-sidebar-icons{
            width:var(--sidebar-icons-width);background:var(--box-bg);border:1px solid var(--box-border);
            border-radius:var(--sidebar-radius);position:fixed;right:var(--sidebar-gap);top:var(--sidebar-gap);
            height:calc(100vh - var(--sidebar-gap)*2);overflow-y:auto;z-index:1000;display:flex;flex-direction:column
        }
        .sidebar-icons-header{padding:20px 0;text-align:center;border-bottom:1px solid var(--box-border)}
        .sidebar-icons-nav{flex:1;padding:20px 0;display:flex;flex-direction:column;gap:5px}
        .icon-nav-item{
            display:flex;flex-direction:column;align-items:center;gap:6px;padding:12px 5px;
            color:var(--text);text-decoration:none;transition:all 0.3s;cursor:pointer;text-align:center;
            font-size:10px;border-right:3px solid transparent
        }
        .icon-nav-item:hover{background:var(--bg);border-right-color:#4f46e5}
        .icon-nav-item.active{background:var(--bg);border-right-color:#4f46e5}
        .icon-nav-item svg{width:24px;height:24px;stroke:currentColor;fill:none}
        header{
            background:var(--box-bg);border:1px solid var(--box-border);padding:15px;margin-top:15px;
            border-radius:12px;display:flex;justify-content:space-between;align-items:center;
            transition:background-color 0.3s,border-color 0.3s;flex-wrap:wrap;gap:10px
        }
        .title{font-size:20px;font-weight:bold;display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
        .title2{font-size:10px;background:#f4f5f6;border-radius:15px;padding:7px;text-align:center}
        body.dark .title2{background:#3a3a3c}
        .header-right{display:flex;flex-direction:row;align-items:center;gap:8px;flex-wrap:wrap}
        .theme-buttons{display:flex;flex-direction:row;align-items:center;gap:8px}
        .theme-buttons button,.header-random-btn{
            display:inline-flex;padding:6px 10px;border-radius:6px;border:1px solid var(--box-border);
            background:var(--box-bg);color:var(--text);cursor:pointer;font-size:12px;transition:all 0.3s;white-space:nowrap
        }
        .theme-buttons button:hover,.header-random-btn:hover{background:#4f46e5;color:white}
        .header-random-btn{background:#f59e0b;color:white;border-color:#f59e0b}
        .header-random-btn:hover{background:#d97706;border-color:#d97706}
        .converter-card{
            background:var(--box-bg);border:1px solid var(--box-border);border-radius:12px;
            padding:24px;margin-top:20px;margin-bottom:20px;transition:all 0.3s
        }
        .converter-title{text-align:center;margin-bottom:24px}
        .converter-title h2{margin-bottom:8px;color:var(--text);font-size:24px}
        .converter-title p{color:var(--text);opacity:0.7;font-size:13px}
        .gradient-preview-wrapper{
            position:relative;border-radius:16px;overflow:hidden;margin-bottom:20px;
            border:1px solid var(--box-border);height:400px;cursor:crosshair
        }
        .gradient-preview-bg{
            position:absolute;top:0;left:0;width:100%;height:100%;z-index:0;
            background-image:linear-gradient(45deg,rgba(128,128,128,0.05) 25%,transparent 25%),
            linear-gradient(-45deg,rgba(128,128,128,0.05) 25%,transparent 25%),
            linear-gradient(45deg,transparent 75%,rgba(128,128,128,0.05) 75%),
            linear-gradient(-45deg,transparent 75%,rgba(128,128,128,0.05) 75%);
            background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0px
        }
        .gradient-canvas{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1}
        .mesh-point{
            position:absolute;width:22px;height:22px;background:white;border:3px solid #4f46e5;
            border-radius:50%;transform:translate(-50%,-50%);cursor:grab;z-index:10;
            box-shadow:0 2px 8px rgba(0,0,0,0.25);transition:box-shadow 0.1s
        }
        .mesh-point.active{box-shadow:0 0 0 6px rgba(79,70,229,0.3);border-color:#2e1fa8}
        .mesh-point .delete-point{
            position:absolute;top:-10px;right:-10px;width:16px;height:16px;background:#ef4444;
            color:white;border-radius:50%;font-size:9px;line-height:16px;text-align:center;
            cursor:pointer;display:none
        }
        .mesh-point:hover .delete-point{display:block}
        .gradient-info{
            text-align:center;font-size:12px;opacity:0.7;margin-top:12px;padding:8px 16px;
            background:var(--bg);border-radius:8px
        }
        .acc-section{border:1px solid var(--box-border);border-radius:8px;margin-bottom:8px;overflow:hidden}
        .acc-header{
            display:flex;align-items:center;justify-content:space-between;padding:8px 12px;
            cursor:pointer;user-select:none;background:var(--bg);transition:background 0.2s
        }
        .acc-header:hover{background:var(--box-border)}
        .acc-title{display:flex;align-items:center;gap:6px;font-size:12px;font-weight:600}
        .acc-arrow{transition:transform 0.2s;opacity:0.5}
        .acc-body{display:none;padding:10px 12px;border-top:1px solid var(--box-border)}
        .acc-body.open{display:block}
        .acc-header.active .acc-arrow{transform:rotate(180deg)}
        .compact-row{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px}
        .compact-row label{font-size:11px;opacity:0.75;white-space:nowrap;flex-shrink:0}
        .compact-row select,.compact-row input[type="range"],.compact-row input[type="number"]{
            flex:1;padding:4px 6px;border-radius:5px;border:1px solid var(--box-border);
            background:var(--bg);color:var(--text);font-size:11px;min-width:0
        }
        .point-list-item{
            display:flex;align-items:center;gap:8px;padding:6px 8px;background:var(--bg);
            border-radius:6px;margin-bottom:4px;font-size:11px
        }
        .point-list-item input[type="color"]{width:28px;height:28px;border:none;border-radius:4px;cursor:pointer}
        .point-list-item .point-info{flex:1;font-size:10px;opacity:0.7}
        .point-list-item .remove-point-btn{
            background:#ef4444;color:white;border:none;border-radius:4px;cursor:pointer;
            padding:2px 6px;font-size:12px
        }
        .add-color-btn{
            width:100%;padding:8px;background:#4f46e5;color:white;border:none;border-radius:6px;
            cursor:pointer;font-size:12px;font-weight:600;transition:all 0.2s;margin-bottom:10px
        }
        .add-color-btn:hover{background:#4338ca}
        .compact-check{display:flex;align-items:center;gap:6px;font-size:11px;margin-bottom:4px}
        .compact-check input{cursor:pointer;width:13px;height:13px}
        .compact-check label{cursor:pointer;opacity:0.8}
        .compact-input{
            width:100%;padding:5px 7px;border-radius:5px;border:1px solid var(--box-border);
            background:var(--bg);color:var(--text);font-size:12px
        }
        .dimension-row{display:flex;gap:8px;margin-bottom:8px}
        .dimension-row>div{flex:1}
        .dimension-row label{font-size:9px;opacity:0.6;display:block;margin-bottom:3px}
        footer{
            margin-top:40px;padding:20px;text-align:center;border-top:1px solid var(--box-border);font-size:12px
        }
        @media(max-width:900px){
            :root{--sidebar-settings-width:280px;--sidebar-icons-width:80px}
            .main-wrapper{margin-right:calc(280px + 80px + var(--sidebar-gap)*3)}
        }
        @media(max-width:768px){
            .right-sidebar-settings,.right-sidebar-icons{display:none}
            .main-wrapper{margin-right:0}
            header{flex-direction:column;align-items:stretch;gap:10px}
            .title{font-size:18px;text-align:center;justify-content:center}
            .header-right{width:100%;justify-content:center}
            .gradient-preview-wrapper{height:300px}
        }
        @media(max-width:480px){
            .title{font-size:16px}
            .converter-title h2{font-size:20px}
        }


#rotate-warning {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(12px);
  background: rgba(0,0,0,0.4);
  font-family: sans-serif;
}

.rotate-box {
  text-align: center;
  color: white;
  padding: 40px;
  border-radius: 20px;
  background: rgba(20,20,20,0.6);
  box-shadow: 0 0 30px rgba(0,0,0,0.6);
  animation: pop 0.4s ease;
}

.rotate-icon {
  font-size: 60px;
  margin-bottom: 20px;
}

@keyframes pop {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}