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  .exercise-top{gap:10px;margin-bottom:16px}.back-link{min-height:44px;font-size:12px;margin-bottom:10px}.exercise-top>.button{font-size:12px;min-height:44px}.exercise-heading h1{font-size:25px;line-height:1.5}.exercise-heading .difficulty{min-height:26px;font-size:11px;padding:4px 9px}.exercise-type{font-size:10px}.exercise-counter{font-size:10px}.problem-panel{padding:21px 18px}.problem-prompt{font-size:15px;line-height:2}.panel-label{font-size:13px}.knowledge-note p{font-size:12px}.sample-title{font-size:13px}.sample-grid pre{font-size:13px}.format-note{font-size:11px}.hint-block>button{min-height:52px;font-size:12px}.hint-block>div p{font-size:13px}.solution-block summary{min-height:42px;font-size:12px}.solution-block p{font-size:13px}.solution-block pre{font-size:12px}.code-editor{height:330px}.code-editor textarea{font-size:16px;line-height:26px;padding-top:17px}.line-numbers{font-size:12px;line-height:26px;padding-top:17px}.editor-top{height:52px}.editor-top>span{font-size:12px}.editor-meta{font-size:10px;padding:10px 13px;flex-wrap:wrap}.run-toolbar{display:grid;grid-template-columns:1fr;gap:9px;padding:12px}.run-toolbar>div{display:grid;grid-template-columns:1fr 1fr;width:100%;gap:9px}.run-toolbar>.button{justify-self:start;min-height:36px}.run-toolbar .button{font-size:12px;min-height:44px;padding:0 13px}.console-tabs strong{font-size:12px}.console-empty p{font-size:12px}.console-empty small{font-size:11px;line-height:1.9}.runner-note{font-size:10px;line-height:1.8;padding:12px 15px}.test-result-title{font-size:12px}.test-result-title>span{font-size:10px}.test-result pre{font-size:13px}.test-result label,.test-compare label{font-size:11px}.answer-feedback h3{font-size:15px;line-height:1.8}.answer-feedback p,.answer-feedback small{font-size:12px}.exercise-bottom .button{min-height:44px;font-size:12px}.quiz-option{min-height:58px}.quiz-option>span:nth-child(2){font-size:14px}.quiz-option>span:first-child{width:29px;height:29px;font-size:12px}.quiz-submit{min-height:44px;font-size:13px}.question-row{padding:19px 14px;min-height:89px}.question-row-copy strong{font-size:14px}.question-row-copy>span{font-size:11px}.question-status{font-size:11px}.level-section-title p{font-size:11px;line-height:1.9}.level-section-title h2 span{font-size:10px}.level-guide{font-size:12px;line-height:1.9}
  dialog{width:calc(100% - 20px);max-height:calc(100dvh - 24px - env(safe-area-inset-top));border-radius:18px;margin:auto 10px;padding-bottom:env(safe-area-inset-bottom);overscroll-behavior:contain}#modal-content{padding:24px 18px}.modal-heading h2{font-size:23px}.modal-intro{font-size:13px;line-height:1.9}.settings-section-title{margin-top:25px}.settings-section-title h3{font-size:15px}.chapter-enabled-count{font-size:12px}.chapter-switch{min-height:62px;padding:17px 15px;gap:12px}.chapter-switch>span:first-child{font-size:14px;gap:13px}.chapter-switch small{font-size:11px}.chapter-switch input{width:42px;height:26px;right:15px;margin:0}.toggle-track{width:42px;height:26px;padding:3px;border-radius:15px}.toggle-track:after{height:20px;width:20px}.chapter-switch input:checked+.toggle-track:after{transform:translateX(16px)}.chapter-sync-footer{gap:8px;align-items:flex-start}.chapter-sync-footer>span{font-size:12px;line-height:1.9;padding-top:8px}.chapter-sync-footer .button{min-height:44px;font-size:12px}.modal-bottom-note{font-size:11px;line-height:1.9;text-align:center;align-items:flex-start}.pending-data{font-size:12px}.pending-data>div{flex-wrap:wrap;justify-content:flex-start;gap:8px}.pending-data .button{min-height:44px;font-size:11px}.toast{bottom:calc(18px + env(safe-area-inset-bottom));font-size:12px;line-height:1.9}.progress-section h2{font-size:17px}.progress-chapter>strong{font-size:12px;width:120px}.progress-chapter{padding:14px 0}.history-row strong{font-size:13px}.history-row small{font-size:10px}.history-row>span:nth-last-child(2){font-size:11px}.gentle-note>p{font-size:12px}.gentle-note b{font-size:12px}footer{font-size:10px;line-height:1.9}
}
@media(min-width:481px) and (max-width:640px){.chapter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.chapter-card{padding:17px 15px}.chapter-card h3{font-size:16px}.difficulty{font-size:10px;padding:5px}.difficulty>small{display:none}.difficulty-row{gap:5px}.topic-tags>span{font-size:9px}.chapter-card>p{font-size:11px}.hero-art{opacity:.2;right:-15px}}