:root{color-scheme:light;--bg: #f4f1e8;--bg-glow: #e4efe4;--surface: #fffdf7;--surface-2: #f7f4ea;--ink: #1d2a24;--muted: #75837b;--line: #e6e1d3;--accent: #1c6b4d;--shadow: 0 22px 45px -24px rgba(29, 42, 36, .45);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:radial-gradient(120% 60% at 50% -10%,var(--bg-glow) 0%,transparent 60%),var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;overscroll-behavior:none;-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit}.app{height:100dvh;max-width:520px;margin:0 auto;padding:calc(env(safe-area-inset-top) + 16px) 18px calc(env(safe-area-inset-bottom) + 12px);display:flex;flex-direction:column;gap:12px}.header{flex:none;display:flex;flex-direction:column;gap:12px}.header-top{display:flex;align-items:flex-end;justify-content:space-between;gap:12px}.eyebrow{margin:0 0 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ease}.chip.is-active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}.stage{flex:1;min-height:0;display:flex;align-items:center}.card{position:relative;width:100%;min-height:min(380px,100%);max-height:100%;display:flex;flex-direction:column;padding:20px 22px 18px;border-radius:30px;border:1px solid rgba(255,255,255,.8);background:radial-gradient(90% 55% at 100% 0%,#f0f8ef 0%,transparent 60%),linear-gradient(180deg,var(--surface) 0%,var(--surface-2) 100%);box-shadow:var(--shadow);user-select:none;-webkit-user-select:none;touch-action:pan-y;animation:card-in .35s cubic-bezier(.22,1,.36,1) both}@keyframes card-in{0%{opacity:0;transform:translateY(10px) scale(.985)}}.stats{text-align:right}.memorized-stat{margin:2px 0 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ease,background .2s ease,opacity .2s ease}.nav-btn.is-primary{border-color:var(--accent);background:var(--accent);color:#fff}.nav-btn:active:not(:disabled){transform:scale(.97)}.nav-btn:disabled{opacity:.35;cursor:default}.swipe-hint{font-size:11px;color:var(--muted);white-space:nowrap}@media(max-height:640px){.word{padding:9px 0}.word h2{font-size:clamp(24px,7vw,30px)}.meaning{margin-top:2px}.hint{display:none}}@media(max-height:560px){.app{height:auto;min-height:100dvh}.stage{flex:none;padding:6px 0}.card{min-height:300px;max-height:none}.hint{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}@media(prefers-color-scheme:dark){:root{color-scheme:dark;--bg: #141a17;--bg-glow: #1d2b24;--surface: #1c2420;--surface-2: #18201c;--ink: #eef3ef;--muted: #93a29a;--line: #2c3630;--accent: #6fd3a3;--shadow: 0 22px 45px -24px rgba(0, 0, 0, .8)}.card{background:radial-gradient(90% 55% at 100% 0%,#1d2c24 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