:root{
  --bg:#f5f7fb;
  --panel:#ffffff;
  --text:#172033;
  --muted:#657086;
  --primary:#4f46e5;
  --primary-2:#7c3aed;
  --good:#16a34a;
  --bad:#dc2626;
  --warn:#f59e0b;
  --line:#e5e7eb;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --radius:20px;
}
*{box-sizing:border-box}
body{margin:0;background:linear-gradient(180deg,#eef2ff 0%,var(--bg) 300px);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;line-height:1.6}
button,input,select,textarea{font:inherit}
.app-header{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;gap:12px;align-items:center;padding:14px clamp(14px,3vw,32px);background:rgba(255,255,255,.84);backdrop-filter:blur(12px);border-bottom:1px solid rgba(229,231,235,.72)}
.brand{display:flex;align-items:center;gap:12px;cursor:pointer}
.logo{width:52px;height:52px;border-radius:17px;background:linear-gradient(135deg,var(--primary),var(--primary-2));display:grid;place-items:center;color:#fff;font-weight:900;font-size:20px;box-shadow:var(--shadow)}
h1{margin:0;font-size:20px;line-height:1.15}.brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
.tabs{display:flex;gap:8px;overflow:auto;padding:10px clamp(12px,3vw,32px);background:#fff;border-bottom:1px solid var(--line);position:sticky;top:81px;z-index:15}
.tab{white-space:nowrap;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;color:var(--muted);cursor:pointer}.tab.active{background:var(--primary);border-color:var(--primary);color:#fff}
.app-shell{max-width:1180px;margin:0 auto;padding:22px clamp(12px,3vw,28px) 42px}
.hero{display:grid;grid-template-columns:1.35fr .65fr;gap:18px;align-items:stretch}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.hero-card{background:linear-gradient(135deg,#4338ca,#7c3aed);color:#fff;border:0;overflow:hidden;position:relative}.hero-card:after{content:"";position:absolute;right:-60px;top:-70px;width:230px;height:230px;background:rgba(255,255,255,.13);border-radius:50%}.hero-card h2{font-size:30px;margin:0 0 8px}.hero-card p{color:rgba(255,255,255,.86);margin:0 0 16px}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;position:relative;z-index:1}
.grid{display:grid;gap:14px}.grid.cards{grid-template-columns:repeat(5,minmax(0,1fr));margin-top:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.menu-card{border:1px solid var(--line);border-radius:18px;background:#fff;padding:17px;cursor:pointer;transition:.18s transform,.18s box-shadow}.menu-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.menu-card b{display:block;font-size:16px}.menu-card span{display:block;color:var(--muted);font-size:13px;margin-top:4px}.menu-icon{font-size:27px;margin-bottom:8px}
.kpi{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.kpi .box{padding:14px;border-radius:16px;background:#f8fafc;border:1px solid var(--line)}.kpi strong{display:block;font-size:24px}.kpi span{font-size:12px;color:var(--muted)}
.progress{height:12px;background:#eef2ff;border-radius:999px;overflow:hidden}.bar{height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-2));border-radius:999px;width:0%}
.section-title{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}.section-title h2{margin:0;font-size:24px}.section-title p{margin:3px 0 0;color:var(--muted);font-size:13px}
.controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:10px 0 16px}.search,.select,.input{border:1px solid var(--line);border-radius:14px;background:#fff;padding:10px 12px;min-height:42px}.search{min-width:240px;flex:1}.select{min-width:150px}
button{border:0;border-radius:14px;background:var(--primary);color:#fff;padding:10px 15px;cursor:pointer;font-weight:700;transition:.16s opacity,.16s transform}button:hover{opacity:.92}button:active{transform:scale(.98)}button.secondary{background:#111827}button.ghost{background:#eef2ff;color:#3730a3;border:1px solid #c7d2fe}button.good{background:var(--good)}button.bad{background:var(--bad)}button.warn{background:var(--warn)}button.small{padding:7px 10px;border-radius:12px;font-size:13px}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.card-stage{display:grid;grid-template-columns:1fr 330px;gap:16px}.flashcard{min-height:360px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;border:1px solid var(--line);border-radius:24px;background:linear-gradient(180deg,#fff,#f8fafc);padding:30px;box-shadow:var(--shadow)}.jp-word{font-size:48px;font-weight:900;letter-spacing:.04em}.reading{font-size:22px;color:var(--primary);font-weight:800}.meaning{font-size:20px;margin-top:12px}.example{background:#f8fafc;border:1px solid var(--line);border-radius:16px;padding:14px;margin-top:16px;max-width:620px}.tag{display:inline-block;border-radius:999px;background:#eef2ff;color:#3730a3;padding:3px 10px;font-size:12px;font-weight:700;margin:3px}.tag.good{background:#dcfce7;color:#166534}.tag.bad{background:#fee2e2;color:#991b1b}.tag.warn{background:#fef3c7;color:#92400e}
.side-list{max-height:520px;overflow:auto}.list-item{padding:12px;border:1px solid var(--line);border-radius:15px;margin-bottom:9px;cursor:pointer;background:#fff}.list-item.active{border-color:var(--primary);background:#eef2ff}.list-item b{display:block}.list-item small{color:var(--muted)}
.quiz-box{max-width:780px;margin:0 auto}.question{font-size:24px;font-weight:900;margin:8px 0 14px}.options{display:grid;gap:10px}.option{width:100%;text-align:left;background:#fff;color:var(--text);border:1px solid var(--line);padding:14px 16px;border-radius:16px}.option.correct{background:#dcfce7;border-color:#86efac;color:#166534}.option.wrong{background:#fee2e2;border-color:#fecaca;color:#991b1b}.feedback{margin-top:14px;padding:14px;border-radius:15px;background:#f8fafc;border:1px solid var(--line);font-weight:700}.feedback.ok{background:#dcfce7;color:#166534}.feedback.ng{background:#fee2e2;color:#991b1b}
.table{width:100%;border-collapse:collapse;background:#fff;border-radius:18px;overflow:hidden}.table th,.table td{border-bottom:1px solid var(--line);padding:10px;text-align:left}.table th{background:#f8fafc;color:#475569}.table tr:last-child td{border-bottom:0}
.reading-text{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;font-size:17px;white-space:pre-wrap}.choice-list{display:grid;gap:10px;margin-top:12px}.mock-header{display:flex;gap:12px;justify-content:space-between;align-items:center;margin-bottom:14px}.score-circle{width:120px;height:120px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--primary) var(--pct),#e5e7eb 0);margin:auto}.score-circle span{background:#fff;width:88px;height:88px;border-radius:50%;display:grid;place-items:center;font-size:22px;font-weight:900}.empty{padding:28px;border:1px dashed #cbd5e1;border-radius:18px;text-align:center;color:var(--muted);background:#f8fafc}.footer{text-align:center;color:var(--muted);font-size:12px;padding:20px}.notice{border-left:5px solid var(--primary);background:#eef2ff;border-radius:12px;padding:12px;color:#312e81}.danger-zone{border:1px solid #fecaca;background:#fff1f2;border-radius:18px;padding:16px}.hidden{display:none!important}
@media (max-width:900px){.hero,.card-stage,.grid.two,.grid.three{grid-template-columns:1fr}.grid.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.tabs{top:81px}.jp-word{font-size:38px}.hero-card h2{font-size:25px}.card-stage{display:block}.side-list{margin-top:16px;max-height:300px}.app-header{align-items:flex-start}.brand p{display:none}}
@media (max-width:520px){.grid.cards{grid-template-columns:1fr}.kpi{grid-template-columns:1fr}.app-header{padding:10px}.tabs{top:73px}.tab{padding:7px 11px}.panel{padding:16px}.flashcard{padding:18px;min-height:320px}.jp-word{font-size:34px}.question{font-size:20px}.search,.select{width:100%;min-width:0}}