/* Production content in the approved TOP shell. No body copy hidden or shortened. */
.site-top{background:#fdfcf8}.site-top .page{min-height:100svh}.site-top .description-box{text-align:left;padding:0;margin:0 0 24px;max-width:none}.site-top .description-box h1{font-size:60px;line-height:1.4;margin:0 0 18px;font-weight:900}.site-top .description-box p{font-size:17px;line-height:1.85;margin:0 0 10px;max-width:630px}.site-top .description-box p:nth-of-type(2){font-size:21px}.site-top .description-box .mobile-note{font-size:12px;color:#577783;max-width:640px}.site-top .hero{padding-top:60px;padding-bottom:170px}.site-top .copy{width:740px}.site-top .mode-cards{display:flex;gap:16px;margin:0;width:100%}.site-top .mode-card{position:relative;flex:1;min-width:0;background:white;border:1px solid #d9e9ec;border-radius:16px;box-shadow:none;padding:0;overflow:hidden;transform:none}.site-top .mode-card--practice{background:#00879a;border-color:#00879a;color:white}.site-top .mode-card.active{outline:3px solid #a7d9dc;outline-offset:2px;transform:none}.site-top .mode-card-select-btn{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:18px 22px;width:100%;min-height:118px;text-align:left;border:0;background:transparent;color:inherit;border-radius:0;font-weight:400}.site-top .mode-card-title{font-size:26px;font-weight:800;color:inherit;margin:0 0 5px}.site-top .cta-subtitle{font-size:13px}.site-top .select-label{position:absolute;right:14px;bottom:10px;font-size:10px;opacity:.8}.site-top .mode-detail{margin:20px 0 0;padding:24px;background:#fff;border:1px solid #d3e6e9;border-radius:16px;color:#073b52}.site-top .mode-card-desc{font-size:14px;color:#325a6b;margin:16px 0}.site-top .mode-detail-header{font-size:20px;color:#073b52;border-color:#d8e8eb}.site-top .difficulty-btn{background:#fff;color:#325a6b;border:1px solid #bfdde3;border-radius:12px}.site-top .difficulty-btn.selected{background:#e8f8f6;color:#006e80;border-color:#00879a}.site-top .start-button{background:#00879a;color:#fff;border-radius:10px}.site-top .history-button{background:#fff;border:1px solid #bddde3;color:#325a6b;border-radius:10px}.site-top .settings-button{color:#073b52}.site-top .wizard-box{font-family:inherit}.site-top .wizard-demo{background:#e9f6f4}.site-top .wizard-summary{background:#eef8f4;color:#073b52}.site-top .wizard-choice-btn{color:#325a6b;border-color:#bddde3}.site-top .wizard-skip,.site-top .wizard-skip-check{color:#577783}
@media(max-width:1190px) and (min-width:769px){.site-top .copy{width:640px}.site-top .description-box h1{font-size:49px}.site-top .mode-card-title{font-size:22px}.site-top .mode-card-select-btn{padding:17px 15px}.site-top .description-box p{max-width:540px;font-size:15px}}
@media(max-width:768px){.site-top .hero{padding-top:0;padding-bottom:96px}.site-top .copy{width:100%}.site-top .description-box h1{font-size:32px;margin-bottom:18px}.site-top .description-box p{font-size:15px;line-height:1.85}.site-top .description-box p:nth-of-type(2){font-size:17px}.site-top .description-box .mobile-note{font-size:11px}.site-top .mode-cards{flex-direction:column;gap:12px}.site-top .mode-card-select-btn{min-height:88px;padding:14px 20px}.site-top .mode-card-title{font-size:23px}.site-top .mode-detail{padding:20px 16px}.site-top .difficulty-buttons{gap:7px;flex-wrap:wrap}.site-top .difficulty-btn{min-width:0;flex:1;padding:12px 5px}.site-top .difficulty-desc{font-size:10px}.site-top .action-buttons{flex-wrap:wrap}.site-top .wizard-box{padding:24px 20px;width:calc(100% - 28px)}}
@media(max-width:359px){.site-top .description-box h1{font-size:25px}.site-top .description-box p{font-size:14px}.site-top .description-box p:nth-of-type(2){font-size:16px}.site-top .mode-card-title{font-size:22px}}
.site-top .description-box{background:transparent;border:0;box-shadow:none;border-radius:0;backdrop-filter:none}.site-top .description-box p{font-weight:400}.site-top .description-box p:nth-of-type(2){max-width:540px}
.site-top .mode-card>.mode-card-desc{padding:0 22px 18px;margin:0;color:inherit;font-size:12px;line-height:1.8}.site-top .mode-card-select-btn{position:relative}.site-top .mode-card--practice .mode-card-desc{color:white}
.site-top .hero{z-index:1}.site-top .description-box p:nth-of-type(2){max-width:630px}.site-top .mode-card>.mode-card-desc{font-weight:400}
.site-top .wizard-choice-btn.selected{color:white;background:#00879a;border-color:#00879a}
.site-top .description-box p:nth-of-type(2){text-wrap:balance}
.site-top .mode-card--practice.active .mode-card-select-btn{background:transparent;border-color:transparent;color:#fff}
.site-top .description-box p{font-size:18px;line-height:1.8}
.site-top .mode-card-select-btn{min-height:126px}
.site-top .mode-card-title{font-size:24px}
.site-top .cta-subtitle{font-size:16px;line-height:1.5}
.site-top .difficulty-desc{font-size:13px}
.site-top .wizard-step-desc{font-size:16px;line-height:1.7}
.site-top .wizard-summary{font-size:15px}
.site-top .wizard-choice-btn,.site-top .wizard-btn{font-size:16px}
.site-top .wizard-skip,.site-top .wizard-skip-check{font-size:13px}
@media(max-width:768px){.site-top .description-box p{font-size:16px}.site-top .mode-card-select-btn{min-height:98px}.site-top .mode-card-title{font-size:23px}}
/* UI polish (2026-09): flat hover feedback, focus ring outside the clipped mode card. */
.site-top .mode-card{cursor:pointer;transition:background-color .15s ease-out,border-color .15s ease-out}
.site-top .mode-card--game:hover{background:#f6fbfa;border-color:#7bc5ce}
.site-top .mode-card--practice:hover{background:#007c90;border-color:#007c90}
.site-top .mode-card:has(:focus-visible){outline:3px solid #00879a;outline-offset:2px}
@supports selector(:has(*)){.site-top .mode-card-select-btn:focus-visible{outline:none}}
.site-top .start-button:hover{background:#007584}
.site-top .history-button:hover,.site-top .difficulty-btn:not(.selected):hover,.site-top .wizard-choice-btn:not(.selected):hover{background:#eff8f7;border-color:#00879a}