:root{--primary: #6C4CF1;--primary-dark: #4B33C4;--accent: #22C3E6;--success: #3FC55F;--success-dark: #2FA64D;--error: #FF4B5C;--streak: #FF9600;--xp: #FFC800;--ink: #1F2233;--muted: #6B7280;--surface: #FFFFFF;--bg: #F6F5FB;--line: #E8E3F8;--sidebar: #15131F;--gender-der: #2F6BFF;--gender-die: #E0457B;--gender-das: #2FA64D}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:Nunito,system-ui,-apple-system,Arial,sans-serif;color:var(--ink);background:var(--bg)}[dir=rtl]{font-family:Vazirmatn,Nunito,system-ui,sans-serif}h1,h2,h3,.display{font-family:"Baloo 2",Nunito,sans-serif}a{color:var(--primary)}button{font-family:inherit}.app{display:flex;height:100vh;overflow:hidden}.sidebar{width:250px;flex:none;background:var(--sidebar);color:#edeafb;display:flex;flex-direction:column;padding:18px 14px;gap:4px}.sb-brand{display:flex;align-items:center;gap:10px;padding:6px 8px 16px}.sb-brand .name{font-family:"Baloo 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.x{border:none;background:none;font-size:18px;color:var(--muted);cursor:pointer}.modal-body{padding:18px 20px;display:flex;flex-direction:column;gap:14px;overflow-y:auto}.modal-search{padding:10px 16px}.modal-list{overflow-y:auto;padding:8px 12px 16px;display:flex;flex-direction:column;gap:6px}.modal-row{display:flex;align-items:center;gap:12px;text-align:left;background:var(--bg);border:1.5px solid 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rgba(255,255,255,.1)}.sb-brand,.sb-foot{display:none}.sb-nav{flex-direction:row;gap:0;flex:1}.sb-item{flex:1;flex-direction:column;justify-content:center;gap:2px;padding:6px 2px;border-radius:0;font-size:10px;text-align:center}.sb-item .ico{font-size:22px;width:auto}.sb-item:hover{background:none}.sb-item.active{background:none;color:#fff;box-shadow:inset 0 2px 0 var(--primary)}.page{padding:18px 16px 80px}.page-head{flex-wrap:wrap;gap:10px}.page-title{font-size:22px}.stats{flex-wrap:wrap}.grades{grid-template-columns:1fr 1fr}.chat{flex-direction:column;height:calc(100vh - 58px)}.chat-list{width:100%;height:auto;max-height:32vh;flex:none;border-right:none;border-bottom:1px solid var(--line)}.chat-msgs{padding:18px 16px}.composer{padding:10px 16px}}