:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--primary: #000000;--bg-white: #ffffff;--bg-soft: #fbfbfb;--text-primary: #1d1d1f;--text-secondary: #86868b;--border-light: #d2d2d7;--accent: #515154}*{margin:0;padding:0;box-sizing:border-box;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Inter,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased}body{background:var(--bg-white);color:var(--text-primary);overflow:hidden}#root{display:flex;height:100vh;width:100vw}.app-container{display:flex;width:100%;height:100%}.sidebar{width:240px;background:var(--bg-soft);border-right:1px solid var(--border-light);display:flex;flex-direction:column;padding:3rem 1.5rem;z-index:10}.logo{font-size:1.125rem;font-weight:600;margin-bottom:4rem;color:var(--text-primary);letter-spacing:-.01em}.nav-menu{display:flex;flex-direction:column;gap:.25rem}.nav-item{display:flex;align-items:center;gap:.75rem;padding:.625rem .75rem;border-radius:8px;color:var(--text-secondary);text-decoration:none;transition:all .2s cubic-bezier(.4,0,.2,1);cursor:pointer;font-size:.9375rem;font-weight:500}.nav-item:hover{background:#0000000d;color:var(--text-primary)}.nav-item.active{background:#fff;color:var(--text-primary);box-shadow:0 1px 3px #0000001a}.main-content{flex:1;overflow-y:auto;padding:4rem 5rem;background:#fff}h1{font-size:2.8rem;font-weight:700;letter-spacing:-.02em;margin-bottom:.5rem}.page-subtitle{color:var(--text-secondary);font-size:1.1rem;margin-bottom:4rem}.stats-bar{display:flex;gap:3rem;margin-bottom:4rem;padding:2rem;background:var(--bg-soft);border-radius:16px;border:1px solid var(--border-light)}.stat-item{display:flex;flex-direction:column;gap:.25rem}.stat-value{font-size:2rem;font-weight:700;color:var(--text-primary)}.stat-label{font-size:.75rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-top:1.5rem}.category-section{margin-bottom:5rem}.category-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border-light)}.category-title{font-size:1.25rem;font-weight:600;text-transform:capitalize}.teacher-card{background:#fff;border:1px solid var(--border-light);border-radius:12px;padding:1.5rem;transition:all .3s cubic-bezier(.4,0,.2,1)}.teacher-card:hover{border-color:var(--text-primary);transform:translateY(-2px);box-shadow:0 4px 12px #0000000d}.teacher-avatar{width:40px;height:40px;background:var(--text-primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;margin-bottom:1rem}.btn-premium{background:var(--text-primary);border:none;color:#fff;padding:.625rem 1.25rem;font-weight:600;border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:.5rem;transition:all .2s ease;font-size:.875rem}.btn-premium:hover{opacity:.9;transform:translateY(-1px)}.modal-overlay{background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.premium-modal{background:#fff;border-radius:20px;padding:3rem;box-shadow:0 20px 40px #0000001a;border:1px solid var(--border-light)}