:root{--bg: #0f1220;--surface: #1a1e33;--surface-2: #232845;--border: #2e3455;--text: #e7e9f3;--muted: #9aa0c0;--accent: #6c8cff;--due: #ffb454;--new: #4fd6a8;--danger: #ff6b81;--radius: 14px;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans JP,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased}.app{min-height:100vh;display:flex;flex-direction:column;max-width:720px;margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border);flex-wrap:wrap}.brand{background:none;border:none;color:var(--text);font-size:18px;font-weight:700;cursor:pointer;padding:0}.synckey{display:flex;align-items:center;gap:8px;font-size:12px}.synckey-label{color:var(--muted)}.synckey-code{background:var(--surface-2);padding:3px 8px;border-radius:8px;font-size:12px;letter-spacing:.5px}.synckey-input{background:var(--surface-2);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:4px 8px;font-size:13px;width:150px}.main{flex:1;padding:20px 16px}.footer{padding:14px 16px;color:var(--muted);font-size:11px;text-align:center;border-top:1px solid var(--border)}.btn{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:12px 18px;font-size:15px;font-weight:600;cursor:pointer;transition:filter .15s,transform .05s}.btn:hover{filter:brightness(1.08)}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:default}.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}.page-title{font-size:20px;margin:4px 0 16px}.grid{display:grid;gap:12px}.card{text-align:left;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;cursor:pointer;color:var(--text);transition:border-color .15s,transform .05s}.card:hover{border-color:var(--accent)}.card:active{transform:translateY(1px)}.card-title{font-size:17px;font-weight:700}.card-desc{color:var(--muted);font-size:13px;margin-top:4px}.card-stats{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}.pill{font-size:12px;padding:3px 9px;border-radius:999px;background:var(--surface-2);color:var(--muted)}.pill-due{color:var(--due)}.pill-new{color:var(--new)}.practice-head{display:flex;align-items:center;gap:10px;margin-bottom:20px}.progressbar{flex:1;height:6px;background:var(--surface-2);border-radius:999px;overflow:hidden}.progressbar-fill{height:100%;background:var(--accent);transition:width .25s}.counter{font-size:12px;color:var(--muted);white-space:nowrap}.rate{min-width:52px;white-space:nowrap;font-variant-numeric:tabular-nums}.tags{display:flex;gap:8px;margin-bottom:14px}.tag{font-size:11px;padding:3px 9px;border-radius:999px;background:var(--surface-2);color:var(--muted)}.tag-due{color:var(--due)}.tag-new,.tag-lv1{color:var(--new)}.tag-lv2{color:var(--due)}.tag-lv3{color:var(--danger)}.card-jp{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px 22px;font-size:22px;line-height:1.6;min-height:96px;display:flex;align-items:center}.card-en{margin-top:14px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:22px;font-size:20px;line-height:1.6;display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.card-en .speak{flex:none;font-size:18px}.note{margin-top:10px;color:var(--muted);font-size:13px;padding:0 4px}.reveal{width:100%;margin-top:18px;padding:16px;font-size:16px}.grade-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}.grade{padding:14px 8px}.grade.again{background:var(--danger)}.grade.good{background:var(--accent)}.grade.easy{background:var(--new);color:#08281f}.practice-nav{margin-top:16px;text-align:center}.pattern-chip{margin-top:14px;display:inline-block;font-size:13px;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);border-radius:999px;padding:4px 12px}.muted{color:var(--muted)}.empty{color:var(--muted);text-align:center;margin-top:40px}.finished{text-align:center;margin-top:48px;display:flex;flex-direction:column;align-items:center;gap:12px}.finished-emoji{font-size:48px}.finished h2{margin:0}