:root{ --blue-900:#bde0fe; --blue-600:#0077b6; --blue-100:#eaf2ff; --ink-900:#212529; --text-muted:#6c757d; --line-1:#dee2e6; --surface-bg:#f8f9fa; --surface-card:#ffffff; --shadow-sm:0 1px 2px rgba(13,27,42,.08);}.tasks-container ol{list-style:none;counter-reset:task-counter;padding-left:0;}.tasks-container li{counter-increment:task-counter;background:var(--surface-card);border:1px solid var(--line-1);border-radius:12px;padding:1.25rem 1.5rem;margin-bottom:1.25rem;box-shadow:var(--shadow-sm);position:relative;padding-left:3.5rem;}.tasks-container li::before{content:counter(task-counter)".";font-weight:bold;color:var(--blue-600);font-size:1.2em;position:absolute;left:1.5rem;top:1.25rem;width:2rem;}.task{display:flex;justify-content:space-between;align-items:center;font-size:1.1em;margin-bottom:1rem;}.task a{flex-shrink:0;margin-left:1rem;padding:0.4rem 0.8rem;background-color:var(--blue-100);color:var(--blue-600);text-decoration:none;border-radius:6px;font-size:0.9em;font-weight:500;transition:background-color 0.2s;}.task a:hover{background-color:var(--blue-900);}.solution-container{}.solution-toggle{cursor:pointer;padding:0.5rem 1rem;border:1px solid var(--line-1);border-radius:6px;background:var(--surface-bg);color:var(--ink-900);transition:background-color 0.2s;}.solution-toggle:hover{background-color:#e9ecef;}.solution-content{display:none;padding:1rem;background:var(--blue-100);border-left:3px solid var(--blue-600);border-radius:4px;margin-top:0.75rem;}.solution-container.visible .solution-content{display:block;}