:root{color-scheme:dark;--ink: #f4f7f5;--muted: #aebdb8;--surface: #111b1f;--surface-strong: #18262b;--line: #294047;--brand: #8ee4c2;--brand-2: #86adff;--accent: #f46d4f;--gold: #ffd166;--mint: #73d6a1;--danger: #ff8c7d;--success: #73d6a1;--nav-bg: rgba(12, 19, 23, .86);--page-bg: radial-gradient(circle at 10% 0%, rgba(142, 228, 194, .14), transparent 32%), radial-gradient(circle at 92% 8%, rgba(134, 173, 255, .16), transparent 34%), linear-gradient(180deg, #081013 0%, #101a1f 48%, #141514 100%);--shadow: 0 20px 48px rgba(0, 0, 0, .38);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=light]{color-scheme:light;--ink: #13201e;--muted: #5d6b68;--surface: #ffffff;--surface-strong: #f5f8f7;--line: #dbe6e2;--brand: #143d3a;--brand-2: #246bfe;--danger: #dd4f3f;--success: #29a76e;--nav-bg: rgba(255, 255, 255, .86);--page-bg: linear-gradient(180deg, #f7fbf8 0%, #eef5f7 42%, #fff8ea 100%);--shadow: 0 18px 44px rgba(19, 32, 30, .12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;color:var(--ink);background:var(--page-bg)}button,input{font:inherit}button{min-height:44px}a{color:inherit;text-decoration:none}.app-nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;padding:12px 20px;background:var(--nav-bg);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.brand,.nav-actions,.nav-link,.auth-link{display:flex;align-items:center}.brand{gap:10px;font-weight:850}.brand-mark{display:grid;place-items:center;width:38px;height:38px;color:#fff9e8;background:var(--brand);border-radius:8px}.brand-name{font-size:1.05rem}.nav-actions{gap:8px}.nav-link,.auth-link,.theme-toggle{gap:7px;min-height:40px;padding:0 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--brand);font-size:.9rem;font-weight:750}.auth-link{border-color:transparent;background:var(--brand);color:#06100f}:root[data-theme=light] .auth-link{color:#fff9e8}.nav-auth-button{cursor:pointer}.sign-up-link{background:var(--accent);color:#fff}.user-button-shell{display:grid;place-items:center;min-width:44px;min-height:44px;padding:3px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}.theme-toggle{width:42px;padding:0;cursor:pointer}.theme-icon{display:none}:root[data-theme=dark] .theme-icon-sun,:root[data-theme=light] .theme-icon-moon{display:block}.app-shell{width:min(1180px,100%);margin:0 auto;padding:24px 18px 56px}.playground{display:grid;grid-template-columns:minmax(0,1.28fr) minmax(280px,.72fr);gap:18px;align-items:stretch;min-height:360px}.intro-panel,.daily-visual,.practice-stage,.panel,.game-card,.stat-card{border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.intro-panel{display:flex;flex-direction:column;justify-content:center;min-height:340px;padding:32px;overflow:hidden}.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:7px;color:var(--brand-2);font-size:.78rem;font-weight:850;text-transform:uppercase}h1,h2,h3,p{margin-top:0}h1{max-width:780px;margin-bottom:16px;font-size:3rem;line-height:1.02}.intro-panel p{max-width:670px;margin-bottom:24px;color:var(--muted);font-size:1.08rem;line-height:1.65}.intro-actions,.result-actions{display:flex;flex-wrap:wrap;gap:10px}.primary-action,.ghost-action,.wide-action,.play-link,.answer-choice,.icon-button,.back-link,.mode-option{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:8px;cursor:pointer;font-weight:850}.primary-action,.play-link{padding:0 18px;background:var(--accent);color:#fff}.ghost-action{padding:0 18px;border:1px solid var(--line);background:var(--surface-strong);color:var(--brand)}.daily-visual{position:relative;display:grid;place-items:center;min-height:340px;overflow:hidden;background:linear-gradient(135deg,#0c1f22f5,#284a98db),var(--brand);color:#fff}.word-orbit{position:absolute;inset:18px;display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;gap:12px;opacity:.48}.word-orbit span{display:grid;place-items:center;border:1px solid rgba(255,255,255,.36);border-radius:8px;font-weight:850}.word-orbit span:nth-child(3){grid-column:1 / -1}.focus-word{position:relative;z-index:1;display:grid;gap:10px;width:min(82%,320px);padding:28px;border:1px solid rgba(255,255,255,.34);border-radius:8px;background:#ffffff1f}.focus-label{color:var(--gold);font-size:.78rem;font-weight:850;text-transform:uppercase}.focus-word strong{font-size:2.4rem;line-height:1}.focus-word span:last-child{color:#e9f7f3;font-weight:700}.stats-grid,.game-grid,.lower-grid{display:grid;gap:14px;margin-top:18px}.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.stat-card{display:grid;grid-template-columns:auto 1fr;gap:8px 10px;min-height:112px;padding:18px}.stat-card svg{color:var(--accent)}.stat-card span{color:var(--muted);font-size:.86rem;font-weight:750}.stat-card strong{grid-column:1 / -1;font-size:2rem;line-height:1}.game-grid{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}.game-card{display:flex;flex-direction:column;justify-content:space-between;gap:22px;min-height:220px;padding:20px}.game-card.is-featured{background:color-mix(in srgb,var(--gold) 11%,var(--surface));border-color:color-mix(in srgb,var(--gold) 42%,var(--line))}.game-icon{display:grid;place-items:center;width:44px;height:44px;margin-bottom:16px;color:var(--brand);background:color-mix(in srgb,var(--brand) 14%,var(--surface-strong));border-radius:8px}.game-card h2{margin-bottom:8px;font-size:1.25rem}.game-card p{color:var(--muted);line-height:1.5}.play-link{width:100%}.game-shell{max-width:980px}.game-screen{display:grid;gap:14px}.game-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.back-link{min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--brand);font-weight:850;box-shadow:var(--shadow)}.mode-switcher{display:grid;grid-template-columns:repeat(auto-fit,minmax(124px,1fr));gap:8px}.mode-option{min-height:46px;padding:0 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--muted);font-size:.92rem;font-weight:850}.mode-option.is-active{border-color:color-mix(in srgb,var(--brand) 48%,var(--line));background:color-mix(in srgb,var(--brand) 14%,var(--surface));color:var(--brand)}.practice-stage{margin-top:18px;overflow:hidden}.practice-stage.is-focused{margin-top:0}.stage-title{display:grid;gap:6px}.stage-title h1{max-width:none;margin-bottom:0;font-size:clamp(2rem,8vw,3.7rem)}.stage-title p{margin-bottom:0;color:var(--muted);line-height:1.5}.stage-header,.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:20px;border-bottom:1px solid var(--line)}.stage-header h2,.panel-heading h2{margin-bottom:0}.round-meter{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.round-meter span{min-width:72px;padding:8px 10px;border-radius:8px;background:var(--surface-strong);color:var(--brand);font-weight:850;text-align:center}.question-panel{min-height:360px;padding:20px}.empty-state,.result-panel{display:grid;place-items:center;min-height:300px;text-align:center}.empty-state{gap:8px;color:var(--muted)}.empty-state strong,.result-panel h3{color:var(--ink);font-size:1.5rem}.question-card{display:grid;gap:18px}.question-topline{display:flex;justify-content:space-between;gap:12px}.question-topline span{padding:7px 9px;border-radius:8px;background:var(--surface-strong);color:var(--brand);font-size:.78rem;font-weight:850;text-transform:uppercase}.question-card h3{margin-bottom:0;color:var(--brand);font-size:2.6rem;line-height:1}.prompt-label{width:max-content;padding:6px 9px;border-radius:8px;background:color-mix(in srgb,var(--brand-2) 16%,var(--surface));color:var(--brand);font-size:.78rem;font-weight:850;text-transform:uppercase}.question-card p{margin-bottom:0;color:var(--ink);font-size:1.12rem;line-height:1.65}.context-prompt{padding:16px;border:1px solid var(--line);border-radius:8px;background:var(--surface-strong)}.root-prompt{padding:16px;border:1px solid var(--line);border-radius:8px;background:color-mix(in srgb,var(--gold) 10%,var(--surface-strong));color:var(--ink);font-weight:850}.context-blank{display:inline-grid;place-items:center;min-width:112px;margin:0 2px;padding:0 8px 2px;border-bottom:3px solid var(--brand-2);color:transparent;line-height:1.2}.context-target{padding:1px 6px 3px;border-radius:6px;background:color-mix(in srgb,var(--gold) 28%,transparent);color:var(--ink);font-weight:900}.root-plus{color:var(--brand);font-weight:950}.answer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.answer-choice{justify-content:flex-start;min-height:64px;padding:14px 16px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-align:left}.answer-choice:hover:not(:disabled){border-color:var(--brand-2)}.answer-choice.is-correct{border-color:var(--success);background:color-mix(in srgb,var(--success) 17%,var(--surface))}.answer-choice.is-wrong{border-color:var(--danger);background:color-mix(in srgb,var(--danger) 16%,var(--surface))}.ladder-builder{display:grid;gap:12px}.ladder-slots,.ladder-bank{display:grid;gap:8px}.ladder-slot,.ladder-chip{border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);text-align:left}.ladder-slot{display:grid;grid-template-columns:34px minmax(0,1fr);align-items:center;min-height:54px;padding:9px 12px}.ladder-slot span{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--surface-strong);color:var(--brand);font-size:.82rem;font-weight:900}.ladder-slot strong{color:var(--muted);font-size:.98rem}.ladder-slot.is-filled{border-color:color-mix(in srgb,var(--brand) 40%,var(--line));background:color-mix(in srgb,var(--brand) 10%,var(--surface))}.ladder-slot.is-filled strong{color:var(--ink)}.ladder-bank{grid-template-columns:repeat(2,minmax(0,1fr))}.ladder-chip{min-height:48px;padding:11px 13px;font-weight:850}.ladder-chip:not(:disabled):hover{border-color:var(--brand-2)}.ladder-chip.is-used{opacity:.45}.ladder-actions{display:flex;gap:10px}.ladder-reset,.ladder-submit{flex:1}.ladder-builder.is-correct .ladder-slot{border-color:var(--success)}.ladder-builder.is-wrong .ladder-slot{border-color:var(--danger)}.feedback-line{display:grid;align-items:start;gap:8px;min-height:92px;color:var(--muted)}.feedback-line strong{color:var(--brand)}.feedback-detail{color:var(--ink);font-weight:750}.mini-next{width:max-content;min-height:36px;padding:0 12px;border:1px solid var(--line);background:var(--surface-strong);color:var(--brand);font-size:.9rem}.result-panel{gap:14px;padding:24px}.result-badge{display:grid;place-items:center;width:88px;height:88px;border-radius:50%;background:var(--gold);color:#342500;font-size:1.5rem;font-weight:900}.missed-review{display:grid;gap:12px;width:min(100%,680px);padding:16px;border:1px solid var(--line);border-radius:8px;background:var(--surface-strong);text-align:left}.missed-review h4,.missed-review p{margin:0}.missed-review h4{color:var(--ink);font-size:1rem}.missed-review ul{display:grid;gap:10px;margin:0;padding:0;list-style:none}.missed-review li{display:grid;gap:5px;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}.missed-review strong{color:var(--brand);font-size:1.05rem}.missed-review span{color:var(--muted);font-size:.92rem}.missed-review p{color:var(--ink);line-height:1.45}.missed-review.is-clean{text-align:center}.save-note,.form-note{color:var(--muted);font-size:.9rem}.lower-grid{grid-template-columns:1.1fr .9fr}.panel{min-height:320px}.icon-button{width:44px;height:44px;border:1px solid var(--line);background:var(--surface-strong);color:var(--brand)}.leaderboard-list{display:grid;gap:8px;margin:0;padding:16px 20px 20px;list-style:none}.leaderboard-list li{display:grid;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:12px;min-height:58px;padding:10px;border:1px solid var(--line);border-radius:8px;background:var(--surface-strong)}.leaderboard-list .leaderboard-empty{display:block;padding:18px;color:var(--muted)}.leader-rank{display:grid;place-items:center;width:36px;height:36px;border-radius:8px;background:var(--brand);color:#fff;font-weight:900}.leader-name{display:grid;min-width:0}.leader-name strong,.leader-name small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.leader-name small{color:var(--muted)}.leader-score{color:var(--accent);font-weight:900;white-space:nowrap}.share-card{display:grid;gap:10px;margin:20px;min-height:184px;padding:22px;border-radius:8px;background:linear-gradient(135deg,#143d3a,#246bfe 56%,#f46d4f);color:#fff}.share-card span{color:var(--gold);font-weight:900}.share-card strong{font-size:1.55rem;line-height:1.15}.share-card p{margin:0;color:#f7fbff;line-height:1.5}.wide-action{width:calc(100% - 40px);margin:0 20px 20px;padding:0 18px;background:var(--brand);color:#fff9e8}.profile-dialog{width:min(440px,calc(100% - 28px));padding:0;border:0;border-radius:8px;box-shadow:var(--shadow)}.profile-dialog::backdrop{background:#13201e73}.profile-box{position:relative;display:grid;gap:14px;padding:24px;background:var(--surface)}.profile-box h2{margin-bottom:0}.profile-box label{display:grid;gap:7px;color:var(--muted);font-weight:750}.profile-box input{width:100%;min-height:46px;padding:0 12px;border:1px solid var(--line);border-radius:8px;color:var(--ink)}.dialog-close{position:absolute;top:12px;right:12px;width:38px;min-height:38px;border:1px solid var(--line);border-radius:8px;background:var(--surface-strong);color:var(--muted);cursor:pointer}.auth-page{display:grid;place-items:center;min-height:calc(100vh - 68px);padding:32px 16px}.auth-fallback{display:grid;gap:14px;width:min(520px,100%);padding:28px;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.auth-fallback h1{margin-bottom:0;font-size:2rem}.auth-fallback p{margin-bottom:0;color:var(--muted);line-height:1.55}.auth-fallback code{padding:2px 6px;border-radius:6px;background:var(--surface-strong);color:var(--brand)}@media(max-width:900px){h1{font-size:2.2rem}.playground,.game-grid,.lower-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.daily-visual,.intro-panel{min-height:300px}}@media(max-width:620px){.app-nav{padding:10px 12px}.brand-name,.nav-link span{display:none}.app-shell{padding:16px 12px 42px}.intro-panel{padding:22px}.intro-actions,.result-actions{flex-direction:column}.primary-action,.ghost-action{width:100%}.stats-grid{grid-template-columns:1fr 1fr}.stat-card{min-height:104px;padding:14px}.stat-card strong{font-size:1.55rem}.stage-header,.panel-heading{align-items:flex-start;flex-direction:column}.round-meter{width:100%;justify-content:stretch}.round-meter span{flex:1}.question-panel{padding:14px}.question-card h3{font-size:2.05rem}.answer-grid,.ladder-bank{grid-template-columns:1fr}.leaderboard-list li{grid-template-columns:34px minmax(0,1fr)}.leader-score{grid-column:2}}