:root{--primary:#102a43;--primary-light:#243b53;--secondary:#627d98;--accent:#f0b429;--background:#f0f4f8;--surface:#fff;--text:#102a43;--text-light:#486581;--success:#27ab83;--error:#e12d39;--border:#d9e2ec;--font-main:"Prompt",sans-serif}[data-theme=dark]{--primary:#829ab1;--primary-light:#102a43;--secondary:#9fb3c8;--accent:#f7c948;--background:#102a43;--surface:#243b53;--text:#f0f4f8;--text-light:#bcccdc;--border:#334e68}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-main);background-color:var(--background);color:var(--text);line-height:1.6;transition:background-color .3s,color .3s}a{color:inherit;text-decoration:none}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.btn{background-color:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:.75rem 1.5rem;font-weight:500;transition:opacity .2s;display:inline-block}.btn:hover{opacity:.9}.card{background-color:var(--surface);border:1px solid var(--border);border-radius:8px;padding:1.5rem;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}.grid{gap:1.5rem;display:grid}.text-center{text-align:center}.mt-4{margin-top:1rem}.mb-4{margin-bottom:1rem}.text-xl{font-size:1.25rem;font-weight:600}.text-2xl{font-size:1.5rem;font-weight:700}.mock-exam-banner{background:var(--surface);border:2px solid var(--accent);background-color:#fffbeb;border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:2rem;padding:1.5rem;display:flex}[data-theme=dark] .mock-exam-banner{background-color:#f0b4291a}.mock-exam-banner h3{color:var(--primary);margin-bottom:.5rem}.mock-btn{background-color:var(--accent);color:var(--primary);font-weight:700}