:root{--font: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--ui-outline: #EBBEBB;--ui-fill: #E5DAD9;--ui-text: #434343}html,body{height:100%;margin:0}body{background:#efebe9;color:var(--ui-text);font-family:var(--font)}.main{min-height:100vh;min-height:100dvh;display:flex;align-items:flex-start;justify-content:center;padding:24px}.panel{max-width:960px;width:100%;background:#efebe9;border:0;border-radius:10px;padding:28px;box-shadow:none;text-align:center}.title{font-size:28px;font-weight:800;margin:0 0 12px;text-align:center;color:var(--ui-text)}.logo{display:block;margin:0 auto 8px;width:200px;height:auto}.subtitle-top{font-size:14px;font-weight:800;color:var(--ui-text);margin:0 0 18px;letter-spacing:.03em}.lead{font-size:14px;color:var(--ui-text);margin:0 0 16px;line-height:1.6;text-align:center}.h2{font-size:18px;font-weight:800;margin:24px 0 12px;text-align:center;color:var(--ui-text)}.section{margin:18px 0 8px}.row{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}.badge{display:inline-block;padding:5px 10px;border-radius:6px;background:var(--ui-fill);border:2px solid var(--ui-outline);font-size:12px;color:var(--ui-text);font-weight:700;text-transform:uppercase;letter-spacing:.05em}.card-label{font-size:12px;color:var(--ui-text);margin-top:6px}.group{background:transparent;border:0;border-radius:0;padding:8px 0}.group .row{margin-bottom:8px}.group-label{font-size:12px;color:var(--ui-text);text-align:center;margin-top:2px;text-transform:uppercase;letter-spacing:.04em}.chapter{display:none}.chapter.active{display:block}.chapter-nav{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:22px}.chapter-arrow{width:40px;height:34px;border-radius:6px;background:var(--ui-fill);border:2px solid var(--ui-outline);color:var(--ui-text);font-family:var(--font);font-size:16px;font-weight:700;cursor:pointer;line-height:1}.chapter-arrow:disabled{opacity:.45;cursor:not-allowed}.chapter-label{min-width:88px;font-size:12px;font-weight:700;color:var(--ui-text);text-transform:uppercase;letter-spacing:.05em}.cards-color-picker{display:flex;flex-direction:column;gap:8px;justify-content:center;align-items:center;margin:8px 0 14px}.cards-color-picker .picker-label{font-size:11px;color:var(--ui-text);text-transform:uppercase;letter-spacing:.05em;font-weight:700}.cards-color-picker .picker-grid{display:grid;grid-template-columns:repeat(6,26px);gap:8px;justify-content:center}.cards-color-picker .color-choice{width:26px;height:26px;border-radius:8px;border:2px solid var(--ui-outline);background:var(--swatch, #999);cursor:pointer;padding:0}.cards-color-picker .color-choice.selected{box-shadow:inset 0 0 0 2px #434343}.board{background:transparent;border:0;border-radius:0;padding:0;margin:0 auto;display:inline-block;line-height:0;overflow:hidden;width:fit-content;height:fit-content}.board[data-kind]{border-radius:12px}.board canvas{display:block}#tut-card-root,#tut-card-crown,#tut-card-ground{border-radius:12px;overflow:hidden}#tut-card-root canvas,#tut-card-crown canvas,#tut-card-ground canvas{border-radius:12px;border:0}#tut-score-indicator{height:20px;margin:0 0 8px;font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--ui-text);display:flex;align-items:center;justify-content:center;visibility:hidden;opacity:0;transition:opacity .14s ease;pointer-events:none}#tut-score-indicator.active{visibility:visible;opacity:1}.actions{display:flex;gap:10px;margin-top:10px;justify-content:center}.back{display:inline-flex;align-items:center;justify-content:center;width:40px;height:34px;padding:0;border:2px solid var(--ui-outline);border-radius:6px;background:var(--ui-fill);color:var(--ui-text);text-decoration:none;font-weight:700;background-image:none;position:relative;font-size:10px;letter-spacing:.03em;text-transform:uppercase;box-sizing:border-box}.back:hover{filter:brightness(.97)}.back:after{content:none}@media(max-width:680px){.cards-color-picker .picker-grid{grid-template-columns:repeat(2,26px)}}