:root{--primary: #646cff;--primary-dark: #535bf2;--background: #ffffff;--foreground: #213547;--card: #f9f9f9;--border: #e0e0e0;--muted: #888888;--muted-foreground: #666666;--accent: #e8e8ff;--radius: 12px;--shadow: 0 2px 8px rgba(0, 0, 0, .08);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .12)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--background);color:var(--foreground);line-height:1.5}.app-layout{display:flex;min-height:100vh}.mobile-header{display:none;position:fixed;top:0;left:0;right:0;height:60px;background:var(--background);border-bottom:1px solid var(--border);padding:0 20px;align-items:center;justify-content:space-between;z-index:100}.mobile-header h1{font-size:18px;font-weight:600}.menu-toggle{background:none;border:none;cursor:pointer;padding:8px;color:var(--foreground)}.sidebar{width:260px;background:var(--card);border-right:1px solid var(--border);padding:24px 0;position:fixed;height:100vh;overflow-y:auto;z-index:90}.sidebar-header{padding:0 24px 24px;border-bottom:1px solid var(--border);margin-bottom:16px}.sidebar-header h2{font-size:20px;font-weight:700;color:var(--primary)}.nav-list{list-style:none;padding:0 12px}.nav-list li{margin-bottom:4px}.nav-link{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius);color:var(--muted-foreground);text-decoration:none;transition:all .2s ease;font-size:15px;font-weight:500}.nav-link:hover{background:var(--accent);color:var(--primary)}.nav-link.active{background:var(--primary);color:#fff}.main-content{flex:1;margin-left:260px;padding:40px;min-height:100vh}.page{max-width:800px;margin:0 auto}.page h1{font-size:32px;font-weight:700;margin-bottom:24px}.hero{text-align:center;padding:60px 0}.hero-label{display:inline-block;font-size:13px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:1.2px;margin-bottom:16px}.hero h1{font-size:48px;font-weight:700;line-height:1.1;margin-bottom:16px}.hero p{font-size:18px;color:var(--muted-foreground);max-width:500px;margin:0 auto 32px}.search-box{display:flex;gap:12px;max-width:600px;margin:0 auto}.search-box input{flex:1;height:56px;padding:0 20px;border:2px solid var(--border);border-radius:var(--radius);font-size:16px;transition:border-color .2s;background:var(--background)}.search-box input:focus{outline:none;border-color:var(--primary)}.search-box button{width:56px;height:56px;background:var(--primary);border:none;border-radius:var(--radius);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.search-box button:hover:not(:disabled){background:var(--primary-dark)}.search-box button:disabled{opacity:.6;cursor:not-allowed}.section{margin-top:48px}.section-title{font-size:14px;font-weight:600;color:var(--muted-foreground);text-transform:uppercase;letter-spacing:.8px;margin-bottom:16px}.teacher-list{display:flex;flex-direction:column;gap:12px}.teacher-card{display:flex;align-items:center;gap:16px;padding:20px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none;color:inherit;transition:all .2s ease}.teacher-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-2px)}.teacher-avatar{width:56px;height:56px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;color:var(--primary);flex-shrink:0}.teacher-info{flex:1}.teacher-info h3{font-size:17px;font-weight:600;margin-bottom:4px}.teacher-info p{font-size:14px;color:var(--muted-foreground);margin-bottom:4px}.subjects{font-size:13px;color:var(--muted)}.arrow{color:var(--muted);font-size:20px}.sessions-list{display:flex;flex-direction:column;gap:16px}.session-card{padding:20px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);transition:all .2s ease}.session-card:hover{box-shadow:var(--shadow)}.session-card.upcoming{border-left:4px solid var(--primary)}.session-card.completed{border-left:4px solid var(--muted);opacity:.8}.session-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.session-header h3{font-size:17px;font-weight:600}.badge{padding:4px 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ease}.sidebar.open{transform:translate(0)}.main-content{margin-left:0;padding:80px 20px 20px}.overlay{display:block}.hero h1{font-size:32px}.search-box{flex-direction:column}.search-box button{width:100%;height:48px}}.mascot-container{position:fixed;bottom:30px;right:30px;z-index:1000;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:8px}.mascot-small{--mascot-size: 60px;--shadow-size: 40px}.mascot-medium{--mascot-size: 100px;--shadow-size: 60px}.mascot-large{--mascot-size: 140px;--shadow-size: 80px}.mascot-avatar{width:var(--mascot-size);height:var(--mascot-size);position:relative;animation:mascot-float 3s ease-in-out infinite;transition:transform .3s ease}.mascot-avatar:hover{transform:scale(1.1)}@keyframes mascot-float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes mascot-bounce{0%,to{transform:translateY(0) scale(1)}25%{transform:translateY(-20px) scale(1.1,.9)}50%{transform:translateY(-10px) 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