*{box-sizing:border-box;font-family:Segoe UI,Roboto,Arial,sans-serif}
body{background:#f4f7fb;color:#102a43;margin:0;padding:24px}
.container{max-width:900px;margin:0 auto;background:#fff;padding:20px;border-radius:8px;box-shadow:0 6px 18px rgba(16,42,67,0.08)}
h1{margin:0 0 12px}
.controls{display:flex;flex-direction:column;gap:12px;margin-bottom:16px}
#exercise-form{display:flex;flex-wrap:wrap;gap:8px}
#exercise-form input{flex:1 1 140px;padding:8px;border:1px solid #dfe7ef;border-radius:6px}
#exercise-form button{padding:8px 12px;background:#0b69ff;color:#fff;border:none;border-radius:6px}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.actions button{padding:8px 10px;border-radius:6px;border:1px solid #dfe7ef;background:#fff}
.actions input[type=file]{padding:6px}
.exercise-list{list-style:none;padding:0;margin:0}
.exercise-item{display:flex;align-items:center;justify-content:space-between;padding:10px;border-bottom:1px solid #eef3f8}
.exercise-meta{display:flex;gap:12px;align-items:center}
.small{font-size:0.9rem;color:#486581}
.btns{display:flex;gap:8px}
.btn{padding:6px 8px;border-radius:6px;border:1px solid #dfe7ef;background:#fff}
.btn.danger{border-color:#ff6b6b;color:#b00020}
@media(max-width:640px){#exercise-form{flex-direction:column} .actions{flex-direction:column;align-items:stretch}}