@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{font-family:Space Grotesk,Pretendard,sans-serif;line-height:1.5;font-weight:400;color:#0f172a;background:radial-gradient(circle at top,rgba(247,178,103,.26),transparent 24%),linear-gradient(180deg,#fffaf2,#eef4ff);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}html{min-width:320px;font-size:16px;-webkit-text-size-adjust:100%}body{margin:0;min-width:320px;min-height:100vh}button{font:inherit;cursor:pointer;transition:transform .18s ease,opacity .18s ease,box-shadow .18s ease}button:hover{transform:translateY(-1px)}button:focus-visible{outline:3px solid rgba(217,119,6,.35);outline-offset:2px}#root{min-height:100vh}@media(max-width:560px){body{overflow-x:hidden}}.app-shell{width:min(920px,calc(100vw - 32px));margin:0 auto;padding:28px 0 56px}.practice-panel{padding:28px;border:1px solid rgba(148,163,184,.24);border-radius:32px;background:radial-gradient(circle at top right,rgba(255,196,124,.22),transparent 24%),linear-gradient(180deg,#fffffff5,#f8fafcfa);box-shadow:0 22px 64px #0f172a1a}.practice-header{display:flex;justify-content:space-between;gap:20px;align-items:center;flex-wrap:nowrap}.scenario-info{display:flex;align-items:center;gap:12px;flex:1 1 420px;min-width:0}.scenario-switch{width:56px;height:56px;border:1px solid rgba(217,119,6,.18);border-radius:18px;background:linear-gradient(180deg,#fff7edf5,#ffedd5f5);display:inline-flex;align-items:center;justify-content:center;box-shadow:0 10px 22px #f59e0b1f;color:#c2410c}.scenario-switch svg{width:25px;height:25px}.scenario-copy{display:grid;gap:2px;min-width:0}.scenario-title{margin:0;font-size:1rem;font-weight:700;line-height:1.35;color:#9a3412}.scenario-subtitle{margin:0;font-size:.84rem;line-height:1.45;color:#7c2d12}.brand-mark{display:inline-flex;align-items:center;flex:0 0 auto;margin:0 0 0 auto;white-space:nowrap}.brand-mark-icon{width:52px;height:52px;border-radius:12px;box-shadow:0 10px 18px #0f172a1f}.hero-visual{position:relative;min-height:220px;margin-top:18px;border-radius:26px;overflow:hidden;background:radial-gradient(circle at top right,rgba(255,255,255,.72),transparent 28%),linear-gradient(135deg,#1f3047,#3f5f85 58%,#6f8fb1);box-shadow:0 20px 44px #0f172a2e}.hero-overlay{min-height:220px;display:flex;align-items:center;justify-content:center;padding:18px}.hero-character-frame{width:100%;display:flex;align-items:center;justify-content:center;min-height:184px;padding:16px;background:linear-gradient(180deg,#f7fbff,#dbeafe);border:1px solid rgba(255,255,255,.28);border-radius:24px;box-shadow:inset 0 1px #ffffff4d}.hero-character{display:block;width:min(100%,430px);max-height:240px;height:auto;object-fit:contain;filter:drop-shadow(0 18px 22px rgba(15,23,42,.12))}.hero-character-fallback{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;min-height:184px;padding:24px;border-radius:20px;background:radial-gradient(circle at top,rgba(255,255,255,.86),transparent 42%),linear-gradient(135deg,#e0f2fe,#fde68a);color:#0f172a;font-size:clamp(1.1rem,2.6vw,1.7rem);font-weight:700;letter-spacing:-.03em;text-align:center}.hero-character-fallback:before{content:"English Muscle";display:inline-flex;align-items:center;justify-content:center;min-width:132px;padding:8px 14px;border-radius:999px;background:#ffffffd1;color:#9a3412;font-size:.82rem;font-weight:800;letter-spacing:.04em;text-transform:uppercase}.illustration-credit{margin:10px 6px 0;font-size:.76rem;line-height:1.4;color:#64748b}.illustration-credit a{color:#0f3f63}.sentence-stage{position:relative;margin-top:22px;padding:34px 22px 92px;border:1px solid rgba(148,163,184,.18);border-radius:28px;background:linear-gradient(180deg,#fffffff0,#fffbebf5);overflow:hidden}.sentence-card{min-height:340px;display:flex;flex-direction:column;gap:18px;padding:12px 10px 18px}.line-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.line-number,.line-speaker{display:inline-flex;align-items:center;justify-content:center;min-height:32px;padding:0 12px;border-radius:999px;font-size:.8rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.line-number{background:#172033;color:#f8fafc}.line-speaker{background:#fff3dd;color:#b45309}.sentence-guide{margin:0;font-size:.95rem;line-height:1.6;color:#64748b}.sentence-block{display:grid;gap:18px}.stacked-lines{display:grid;gap:14px}.stacked-line,.current-line{padding:18px 20px;border:1px solid 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18px;border-radius:24px}.practice-header{align-items:flex-start;gap:12px}.scenario-info{align-items:flex-start;flex:1 1 auto}.scenario-copy{flex:1}.brand-mark{margin-left:auto;justify-content:flex-end;align-self:flex-start}.brand-mark-icon{width:44px;height:44px}.hero-visual,.hero-overlay{min-height:200px}.hero-character-frame{min-height:168px}.sentence-card{min-height:300px}}@media(max-width:560px){.app-shell{width:min(100vw - 18px,920px);padding:max(12px,env(safe-area-inset-top)) 0 calc(132px + env(safe-area-inset-bottom))}.practice-panel{padding:20px 14px;border-radius:22px}.sentence-card{min-height:280px;padding:0}.hero-visual{min-height:180px}.hero-overlay{min-height:180px;padding:18px}.hero-character-frame{min-height:150px}.hero-character{width:min(100%,250px)}.fixed-controls{right:14px;bottom:14px;gap:10px}.left-fixed-controls{left:14px;bottom:14px}.floating-button{width:54px;height:54px}.floating-button-wide{min-width:94px;padding:0 12px;font-size:.8rem}.progress-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:16px;margin-bottom:18px}.progress-row span{justify-content:center;min-width:0;padding:10px 12px;text-align:center}.stacked-line,.current-line{padding:16px}}