@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap";
:root{--color-primary:#0ea5e9;--color-primary-hover:#0284c7;--color-primary-light:#38bdf8;--color-primary-100:#e0f2fe;--color-primary-50:#f0f9ff;--color-accent:#facc15;--color-accent-hover:#eab308;--color-accent-200:#fef08a;--color-success:#10b981;--color-warning:#f59e0b;--color-danger:#ef4444;--bg-base:#f8fafc;--bg-surface:#fff;--bg-input:#f1f5f9;--text-heading:#0f172a;--text-body:#475569;--text-muted:#64748b;--border-color:#e2e8f0;--border-hover:#0ea5e980;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px -1px #00000014,0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #00000014,0 4px 6px -4px #0000000d;--shadow-xl:0 20px 25px -5px #00000014,0 8px 10px -6px #0000000a;--shadow-sky:0 10px 15px -3px #0ea5e933;--shadow-yellow:0 10px 15px -3px #fef08a80;--radius-btn:12px;--radius-card:16px;--radius-sm:8px;--radius-full:9999px;--font-family:"Inter","Noto Sans JP",-apple-system,BlinkMacSystemFont,sans-serif;--text-hero:48px;--text-page-title:30px;--text-card-title:20px;--text-lg:18px;--text-base:16px;--text-sm:14px;--text-xs:12px;--transition-fast:.15s ease;--transition-base:.2s ease;--transition-slow:.3s ease}.theme-dark{--bg-base:#0f172a;--bg-surface:#1e293b;--bg-input:#334155;--text-heading:#fff;--text-body:#cbd5e1;--text-muted:#94a3b8;--border-color:#334155;--border-hover:#0ea5e980;--shadow-sm:0 1px 2px #0000004d;--shadow-md:0 4px 6px #0000004d;--shadow-lg:0 10px 15px #0000004d}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{font-size:var(--text-base);scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);background:var(--bg-base);color:var(--text-body);min-height:100vh;line-height:1.5}a{color:var(--color-primary);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--color-primary-hover)}img{max-width:100%;display:block}.container{max-width:1200px;margin:0 auto;padding:0 24px}.btn{border-radius:var(--radius-btn);font-family:var(--font-family);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-base);border:none;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-weight:600;line-height:1;text-decoration:none;display:inline-flex}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sky)}.btn-primary:hover{background:var(--color-primary-hover);color:#fff;transform:translateY(-1px);box-shadow:0 14px 20px -5px #0ea5e940}.btn-primary:active{transform:translateY(0)}.btn-cta{background:var(--color-accent);color:#0f172a;box-shadow:var(--shadow-yellow);font-weight:700}.btn-cta:hover{background:var(--color-accent-hover);color:#0f172a;transform:translateY(-1px);box-shadow:0 14px 20px -5px #fef08a99}.btn-secondary{background:var(--bg-surface);color:var(--text-heading);border:1px solid var(--border-color)}.btn-secondary:hover{border-color:var(--color-primary);background:var(--color-primary-50);color:var(--text-heading)}.btn-ghost{color:var(--text-muted);background:0 0}.btn-ghost:hover{color:var(--text-heading);background:var(--bg-input)}.btn-sm{font-size:var(--text-xs);padding:8px 16px}.btn-lg{font-size:var(--text-base);padding:16px 32px}.btn-full{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.form-group{margin-bottom:20px}.form-label{font-size:var(--text-sm);color:var(--text-heading);margin-bottom:6px;font-weight:500;display:block}.form-input{background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-btn);width:100%;color:var(--text-heading);font-family:var(--font-family);font-size:var(--text-base);transition:all var(--transition-fast);outline:none;padding:12px 16px}.form-input:focus{border-color:var(--color-primary);background:var(--bg-surface);box-shadow:0 0 0 3px #0ea5e926}.form-input::placeholder{color:var(--text-muted)}.card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-card);transition:all var(--transition-base);overflow:hidden}.card:hover{border-color:var(--color-primary-100);box-shadow:var(--shadow-xl);transform:translateY(-2px)}.card-body{padding:24px}.card-thumbnail{aspect-ratio:16/9;object-fit:cover;background:var(--bg-input);width:100%}.badge{border-radius:var(--radius-full);font-size:var(--text-xs);letter-spacing:.02em;align-items:center;padding:4px 12px;font-weight:600;display:inline-flex}.badge-primary{background:var(--color-primary-100);color:var(--color-primary-hover)}.badge-success{color:#059669;background:#10b9811f}.badge-warning{color:#d97706;background:#f59e0b1f}.badge-free{color:var(--color-accent-hover);background:#facc151f}.navbar{z-index:100;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);background:#ffffffeb;padding:0 24px;position:sticky;top:0}.theme-dark .navbar{border-bottom-color:var(--border-color);background:#1e293beb}.navbar-inner{justify-content:space-between;align-items:center;max-width:1200px;height:64px;margin:0 auto;display:flex}.navbar-brand{font-size:var(--text-lg);color:var(--text-heading);align-items:center;gap:10px;font-weight:700;display:flex}.navbar-brand:hover{color:var(--text-heading)}.navbar-brand-icon{border-radius:var(--radius-sm);background:var(--color-primary);justify-content:center;align-items:center;width:32px;height:32px;font-size:1rem;display:flex}.navbar-menu{align-items:center;gap:8px;display:flex}.navbar-link{border-radius:var(--radius-sm);color:var(--text-muted);font-size:var(--text-sm);transition:all var(--transition-fast);padding:8px 16px;font-weight:500}.navbar-link:hover{color:var(--text-heading);background:var(--bg-input)}.navbar-link.active{color:var(--color-primary);background:var(--color-primary-50)}.navbar-avatar{border-radius:var(--radius-full);background:var(--color-primary);width:36px;height:36px;font-size:var(--text-sm);color:#fff;cursor:pointer;transition:all var(--transition-fast);justify-content:center;align-items:center;font-weight:700;display:flex}.navbar-avatar:hover{box-shadow:var(--shadow-sky);transform:scale(1.08)}.page-header{padding:48px 0 32px}.page-title{font-size:var(--text-page-title);color:var(--text-heading);letter-spacing:-.01em;margin-bottom:8px;font-weight:700;line-height:1.3}.page-subtitle{font-size:var(--text-base);color:var(--text-body)}.grid{gap:24px;display:grid}.grid-2{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}.grid-3{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.layout-sidebar{grid-template-columns:280px 1fr;gap:0;min-height:calc(100vh - 64px);display:grid}.sidebar{background:var(--bg-surface);border-right:1px solid var(--border-color);padding:24px 0;overflow-y:auto}.sidebar-section{margin-bottom:24px;padding:0 16px}.sidebar-title{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin-bottom:8px;padding:0 12px;font-weight:700}.sidebar-item{border-radius:var(--radius-sm);color:var(--text-body);font-size:var(--text-sm);transition:all var(--transition-fast);cursor:pointer;align-items:center;gap:12px;padding:10px 12px;display:flex}.sidebar-item:hover{background:var(--bg-input);color:var(--text-heading)}.sidebar-item.active{background:var(--color-primary-50);color:var(--color-primary);font-weight:600}.theme-dark .sidebar-item.active{color:var(--color-primary-light);background:#0ea5e91f}.sidebar-item-number{border-radius:var(--radius-full);background:var(--bg-input);width:24px;height:24px;font-size:var(--text-xs);flex-shrink:0;justify-content:center;align-items:center;font-weight:600;display:flex}.sidebar-item.completed .sidebar-item-number{background:var(--color-success);color:#fff}.main-content{padding:32px 40px;overflow-y:auto}.video-wrapper{aspect-ratio:16/9;border-radius:var(--radius-card);width:100%;box-shadow:var(--shadow-lg);background:#000;margin-bottom:32px;position:relative;overflow:hidden}.video-wrapper iframe{border:none;width:100%;height:100%;position:absolute;top:0;left:0}.lesson-content{max-width:720px;line-height:1.75;font-size:var(--text-lg);color:var(--text-body)}.lesson-content h2{color:var(--text-heading);margin:32px 0 16px;font-size:24px;font-weight:700}.lesson-content h3{font-size:var(--text-card-title);color:var(--text-heading);margin:24px 0 12px;font-weight:600}.lesson-content p{margin-bottom:16px}.lesson-content ul,.lesson-content ol{margin-bottom:16px;padding-left:24px}.lesson-content li{margin-bottom:8px}.lesson-content a{color:var(--color-primary);text-underline-offset:3px;text-decoration:underline}.lesson-content a:hover{color:var(--color-primary-hover)}.login-page{background:radial-gradient(ellipse at 20% 50%,#0ea5e90f 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,#facc150a 0%,transparent 50%),var(--bg-base);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-card);width:100%;max-width:420px;box-shadow:var(--shadow-xl);padding:40px}.login-logo{text-align:center;margin-bottom:32px}.login-logo-icon{border-radius:var(--radius-btn);background:var(--color-primary);justify-content:center;align-items:center;width:56px;height:56px;margin-bottom:16px;font-size:1.6rem;display:inline-flex}.login-logo h1{color:var(--text-heading);font-size:24px;font-weight:700}.login-logo p{font-size:var(--text-sm);color:var(--text-muted);margin-top:4px}.progress-bar{background:var(--bg-input);border-radius:2px;width:100%;height:4px;overflow:hidden}.progress-bar-fill{background:var(--color-primary);height:100%;transition:width var(--transition-slow);border-radius:2px}.empty-state{text-align:center;color:var(--text-muted);padding:64px 24px}.empty-state-icon{margin-bottom:16px;font-size:3rem}.empty-state h3{font-size:var(--text-card-title);color:var(--text-body);margin-bottom:8px;font-weight:600}@media (max-width:768px){.layout-sidebar{grid-template-columns:1fr}.sidebar{display:none}.main-content{padding:24px 16px}.grid-2,.grid-3{grid-template-columns:1fr}.page-title{font-size:24px}.login-card{margin:16px;padding:32px 24px}}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-12px)}to{opacity:1;transform:translate(0)}}.animate-fade-in{animation:.4s forwards fadeIn}.animate-slide-in{animation:.3s forwards slideIn}.stagger>*{opacity:0;animation:.4s forwards fadeIn}.stagger>:first-child{animation-delay:50ms}.stagger>:nth-child(2){animation-delay:.1s}.stagger>:nth-child(3){animation-delay:.15s}.stagger>:nth-child(4){animation-delay:.2s}.stagger>:nth-child(5){animation-delay:.25s}.stagger>:nth-child(6){animation-delay:.3s}.spinner{border:3px solid var(--border-color);border-top-color:var(--color-primary);border-radius:50%;width:24px;height:24px;animation:.6s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.alert{border-radius:var(--radius-sm);font-size:var(--text-sm);margin-bottom:16px;padding:12px 16px}.alert-error{color:#dc2626;background:#ef444414;border:1px solid #ef444426}.alert-success{color:#059669;background:#10b98114;border:1px solid #10b98126}