.timezone-practice { margin-block: 32px; padding: clamp(20px, 3vw, 32px); border: 1px solid #ccd9e5; border-block-start: 4px solid #28689f; border-radius: 14px; background: #fff; color: #20242a; }
.timezone-practice > h2 { margin-block: 0 16px; color: #002355; }
.timezone-practice :is(p, li) > bdi[dir="ltr"] { white-space: nowrap; }
.timezone-concepts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-block: 24px; }
.timezone-concepts > div { padding-inline-start: 16px; border-inline-start: 3px solid #c6d5e3; min-width: 0; }
.timezone-concepts h3 { margin-block: 0 10px; }
.timezone-concepts p { margin: 0; }
.timezone-controls { margin-block: 28px 20px; }
.timezone-controls fieldset { margin: 0; padding: 20px; border: 1px solid #c6d5e3; border-radius: 10px; background: #f5f8fb; min-width: 0; }
.timezone-controls legend { float: none; width: auto; padding-inline: 8px; font-size: 1.2rem; font-weight: 700; color: #002355; }
.timezone-inputs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.timezone-inputs label { display: block; font-weight: 700; min-width: 0; }
.timezone-inputs input { display: block; width: 100%; min-width: 0; min-height: 48px; margin-block-start: 8px; font: inherit; }
.timezone-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-block: 20px 16px; }
.timezone-practice .timezone-note { font-size: .95rem; line-height: 1.65; color: #465567; margin-block: 16px 0; }
.timezone-message { padding: 12px 16px; border-inline-start: 4px solid #28689f; background: #edf3f9; font-weight: 700; }
.timezone-table { max-width: 100%; overflow-x: auto; border: 1px solid #d8dfe6; border-radius: 10px; margin-block: 20px; }
.timezone-table table { width: 100%; min-width: 680px; border-collapse: collapse; font-size: 1rem; }
.timezone-table caption { caption-side: top; padding: 14px 16px; color: #002355; font-weight: 700; text-align: start; }
.timezone-table th, .timezone-table td { padding: 16px; border-block-start: 1px solid #d8dfe6; text-align: start; vertical-align: top; }
.timezone-table thead { background: #edf3f9; color: #002355; }
.timezone-table tbody th { font-weight: 400; }
.timezone-table:focus-visible { outline: 3px solid #28689f; outline-offset: 4px; }
.timezone-practice--case { background: #f5f8fb; }
.timezone-practice--case ol { margin-block: 20px; padding-inline-start: 24px; }
.timezone-practice--case li { padding-inline-start: 6px; margin-block: 12px; }
.timezone-practice [hidden] { display: none; }
@media (max-width: 767px) { .timezone-concepts, .timezone-inputs { grid-template-columns: minmax(0, 1fr); } .timezone-controls fieldset { padding: 16px; } .timezone-actions > button { width: 100%; white-space: normal; } }