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#0000;margin-bottom:-1px;padding:10px 0;font-size:13px}.lesson-tab.is-active{color:var(--charcoal);border-bottom-color:var(--charcoal)}.lesson-tab-body{min-height:4em;margin-top:20px;font-size:14px}.lesson-unavailable{color:var(--taupe);font-size:13px}.lesson-next{width:100%;margin-top:28px}.lesson-next-name{text-align:center;max-width:none;color:var(--taupe);margin:10px 0 0;font-size:12px}.lesson-last{margin-top:28px}@media (width>=768px){.lesson-body{padding:32px 48px 64px}}.field+.field{margin-top:20px}.field-label{color:var(--taupe);margin-bottom:8px;font-size:12px;display:block}.field-input{background:var(--paper);border:1px solid var(--rule-strong);border-radius:var(--radius);width:100%;font-family:var(--font-gothic);color:var(--body);min-height:var(--tap-min);transition:border-color var(--duration) var(--easing);padding:14px 16px;font-size:14px;display:block}.field-input::placeholder{color:var(--stone)}.field-input:focus{outline:2px solid var(--charcoal);outline-offset:3px;border-color:var(--charcoal)}.field-input-error{border-color:var(--error)}.field-error{max-width:none;color:var(--error);margin:8px 0 0;font-size:12px;line-height:1.6}.field-hint{max-width:none;color:var(--muted);margin:8px 0 0;font-size:12px}.field-success{max-width:none;color:var(--charcoal);margin:8px 0 0;font-size:12px}:root{--ivory:#f7f5f0;--paper:#fff;--beige:#c9b5a3;--greige:#b3a99f;--stone:#a9a9a5;--taupe:#6b5b4e;--charcoal:#1a1a18;--body:#3d3a35;--muted:#8a8378;--rule:#dfd9d0;--rule-strong:#c7bfb4;--placeholder-fill:#efebe4;--accent:#26382b;--accent-soft:#e4e8e2;--error:#c0392b;--error-soft:#f7e9e6;--font-mincho:"Yu Mincho", "游明朝体", YuMincho, "Shippori Mincho", serif;--font-gothic:"Yu Gothic Medium", "游ゴシック Medium", YuGothic, "Noto Sans JP", sans-serif;--font-display:"Playfair Display", Georgia, serif;--font-label:Inter, Helvetica, sans-serif;--radius:2px;--radius-pill:999px;--pad-mobile:20px;--pad-desktop:40px 48px;--sidebar-width:232px;--duration:.2s;--easing:ease-out;--tap-min:44px;--tap-min-pc:48px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--ivory);color:var(--body);font-family:var(--font-gothic);letter-spacing:.02em;-webkit-font-smoothing:antialiased;margin:0;font-size:14px;line-height:1.9}p{max-width:34em;margin:0 0 1em}h1,h2,h3,h4{color:var(--charcoal);font-family:var(--font-mincho);letter-spacing:.04em;margin:0;font-weight:500;line-height:1.45}h1{font-size:22px}.label-en{color:var(--muted);font-family:var(--font-label);letter-spacing:.2em;text-transform:uppercase;font-size:11px;font-weight:400}.logo{color:var(--charcoal);font-family:var(--font-display);letter-spacing:.02em;font-size:19px;font-weight:400}.card{background:var(--paper);border:1px solid var(--rule);border-radius:var(--radius);padding:20px}.placeholder{background:var(--placeholder-fill);border-radius:var(--radius)}.btn{min-height:var(--tap-min);border-radius:var(--radius);font-family:var(--font-gothic);letter-spacing:.08em;cursor:pointer;transition:opacity var(--duration) var(--easing), color var(--duration) var(--easing);border:1px solid #0000;justify-content:center;align-items:center;gap:14px;padding:15px 20px;font-size:13px;display:inline-flex}.btn-primary{background:var(--charcoal);border-color:var(--charcoal);color:var(--ivory)}.btn-secondary{border-color:var(--charcoal);color:var(--charcoal);background:0 0}.btn:hover:not(:disabled){opacity:.85}.btn:disabled{background:var(--stone);border-color:var(--stone);color:var(--paper);cursor:not-allowed}.btn-secondary:disabled{border-color:var(--stone);color:var(--stone);background:0 0}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--charcoal);outline-offset:3px}.granted-list{margin:0;padding:0;list-style:none}.granted-list li{border-bottom:1px solid var(--rule);align-items:flex-start;gap:12px;padding:12px 0;font-size:14px;display:flex}.granted-list li:last-child{border-bottom:none}.granted-list .diamond{margin-top:9px}.link{color:var(--charcoal);border-bottom:1px solid var(--rule-strong);transition:color var(--duration) var(--easing), border-color var(--duration) var(--easing);padding-bottom:2px;text-decoration:none}.link:hover{color:var(--taupe);border-color:var(--taupe)}.badge{border-radius:var(--radius-pill);letter-spacing:.1em;align-items:center;padding:5px 16px;font-size:11px;display:inline-flex}.badge-strong{background:var(--charcoal);border:1px solid var(--charcoal);color:var(--ivory)}.badge-info{border:1px solid var(--rule-strong);color:var(--taupe)}.badge-state{background:var(--accent-soft);color:var(--accent)}.progress{background:var(--rule);height:2px}.progress-fill{background:var(--accent);height:100%;transition:width var(--duration) var(--easing)}.divider{align-items:center;gap:12px;display:flex}.divider:before,.divider:after{content:"";background:var(--rule);flex:1;height:1px}.error-text{color:var(--error);font-size:12px}.error-banner{background:var(--error-soft);color:var(--error);border-radius:var(--radius);padding:12px 16px;font-size:13px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}