:root { --blue: #2673f0; --yellow: #ffe37a; --line: #d7dce3; --outline: #384152; }
* { box-sizing: border-box; box-shadow: none !important; text-shadow: none !important; }
html, body { min-height: 100%; margin: 0; }
body { background: #fff; color: #20242a; font-family: Pretendard, "Noto Sans KR", system-ui, sans-serif; }
.corn-page { width: min(100%, 700px); min-width: 0; margin: 0 auto; padding: 28px max(18px, env(safe-area-inset-right)) 44px max(18px, env(safe-area-inset-left)); overflow-x: clip; }
.corn-tool { min-width: 0; }
.corn-tool textarea { display: block; width: min(100%, 560px); margin: 8px auto 0; resize: vertical; border: 1px solid var(--line); border-radius: 10px; padding: 9px 10px; font: inherit; font-size: 13px; line-height: 1.4; }
.corn-tool textarea[hidden] { display: none; }
.corn-top-actions { display: flex; justify-content: center; gap: 8px; }
.corn-paste,
.corn-result-copy { min-height: 44px; border: 0; border-radius: 999px; background: var(--blue); color: #fff; padding: 0 22px; font: inherit; font-weight: 800; cursor: pointer; }
.corn-paste:active,
.corn-result-copy:active { background: #155fd1; }
.corn-result-copy:disabled { background: #c9d0da; cursor: default; }
.corn-status { display: flex; min-height: 22px; align-items: center; justify-content: flex-end; gap: 7px; margin: 8px 0 12px; color: #68717d; font-size: 13px; }
.corn-status strong { min-width: 36px; color: var(--blue); text-align: right; }
.corn-board { display: grid; width: min(calc(100% - 8px), 560px); min-width: 0; margin: 0 auto; aspect-ratio: 4 / 1; grid-template-columns: repeat(14, minmax(0, 1fr)); grid-template-rows: repeat(7, minmax(0, 1fr)); border: 1px solid var(--line); }
.corn-cell { position: relative; display: grid; min-width: 0; place-items: center; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.corn-cell:nth-child(14n) { border-right: 0; }
.corn-cell:nth-last-child(-n + 14) { border-bottom: 0; }
.corn-cell.is-filled { background: var(--yellow); color: transparent; }
.corn-cell.piece-top { border-top: 1px solid var(--outline); }
.corn-cell.piece-right { border-right: 1px solid var(--outline); }
.corn-cell.piece-bottom { border-bottom: 1px solid var(--outline); }
.corn-cell.piece-left { border-left: 1px solid var(--outline); }
.corn-cell.is-dimmed { background: rgb(255 227 122 / 30%); }
.corn-cell.is-dimmed.piece-top { border-top-color: rgb(56 65 82 / 30%); }
.corn-cell.is-dimmed.piece-right { border-right-color: rgb(56 65 82 / 30%); }
.corn-cell.is-dimmed.piece-bottom { border-bottom-color: rgb(56 65 82 / 30%); }
.corn-cell.is-dimmed.piece-left { border-left-color: rgb(56 65 82 / 30%); }
.corn-guide { width: min(100%, 220px); margin: 28px auto 0; }
.corn-guide-board { display: grid; width: 100%; aspect-ratio: 10 / 7; grid-template-columns: repeat(5, 1fr); grid-template-rows: repeat(7, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.corn-guide-cell { display: grid; min-width: 0; place-items: center; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.corn-guide-cell.is-filled { background: var(--yellow); }
.corn-guide-cell.is-previous { background: rgb(255 227 122 / 38%); }
.corn-guide-cell.is-previous.piece-top { border-top-color: rgb(56 65 82 / 38%); }
.corn-guide-cell.is-previous.piece-right { border-right-color: rgb(56 65 82 / 38%); }
.corn-guide-cell.is-previous.piece-bottom { border-bottom-color: rgb(56 65 82 / 38%); }
.corn-guide-cell.is-previous.piece-left { border-left-color: rgb(56 65 82 / 38%); }
.corn-guide-cell.piece-top { border-top: 2px solid var(--outline); }
.corn-guide-cell.piece-right { border-right: 2px solid var(--outline); }
.corn-guide-cell.piece-bottom { border-bottom: 2px solid var(--outline); }
.corn-guide-cell.piece-left { border-left: 2px solid var(--outline); }
.corn-guide-controls { display: grid; grid-template-columns: 48px 48px; align-items: center; justify-content: space-between; gap: 10px; margin-top: 12px; }
.corn-guide-controls button { display: grid; width: 48px; height: 42px; place-items: center; border: 0; border-radius: 999px; background: var(--blue); color: #fff; font: inherit; font-size: 22px; cursor: pointer; }
.corn-guide-controls button:disabled { background: #c9d0da; cursor: default; }