.dashboard{background-color:#f9fafb;color:#1f2937;font-family:Poppins,sans-serif;min-height:100vh}.dashboard__container{margin:0 auto;max-width:1200px;padding:3rem 1rem}.dashboard__welcome h1{color:#111827;font-size:2rem;font-weight:700;margin-bottom:.5rem}.dashboard__welcome p{color:#6b7280;font-size:1rem;margin-bottom:2rem}.dashboard__stats-tabs{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center;margin-bottom:2rem}.dashboard__card-tab{align-items:center;background:#fff;border:1px solid #e5e7eb;border-radius:1rem;box-shadow:0 2px 6px #0000000d;cursor:pointer;display:flex;flex-direction:column;padding:1.2rem 1.5rem;text-align:center;transition:all .3s ease;width:300px}.dashboard__card-tab:hover{border-color:#3b82f6;transform:translateY(-3px)}.dashboard__card-tab.active{background:#3b82f6;box-shadow:0 4px 10px #0000001a;color:#fff}.dashboard__card-tab .icon{font-size:2rem;margin-bottom:.5rem}.dashboard__card-tab p{font-size:1rem;font-weight:600;margin:0}.dashboard__card-tab span{font-size:1.3rem;font-weight:700;margin-top:.3rem}.dashboard__courses h2{color:#111827;font-size:1.5rem;font-weight:600;margin-bottom:1.2rem;text-align:center}.course-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}.course-card{border:1px solid #e5e7eb;border-radius:1rem;box-shadow:0 2px 6px #0000000d;padding:1.5rem;transition:all .3s ease}.course-card:hover{box-shadow:0 6px 12px #0000001a}.course-icon{font-size:2rem;margin-bottom:.6rem}.course-card h3{font-size:1.1rem;margin-bottom:.4rem}.course-card p{color:#6b7280;font-size:.9rem;margin-bottom:1rem}.course-progress{align-items:center;display:flex;justify-content:space-between;margin-bottom:.8rem}.progress-bar{background:#e5e7eb;border-radius:6px;height:6px;margin-right:.5rem;overflow:hidden;width:80%}.progress-fill{background:linear-gradient(90deg,#3b82f6,#6a11cb);height:100%;transition:width .5s ease}.btn-back,.btn-claim,.btn-resume{padding:.4rem 1rem}.btn-back,.btn-claim,.btn-resume{background:#3b82f6;border:none;border-radius:9999px;color:#fff;cursor:pointer;font-weight:500;transition:background .3s ease,transform .2s}.btn-resume{display:block;margin:0 auto;padding:.8rem 1rem;text-align:center;width:180px}.btn-claim:hover,.btn-resume:hover{background:#2563eb;transform:translateY(-2px)}.btn-back{background:#9ca3af;margin-top:.8rem}.btn-back:hover{background:#6b7280;transform:translateY(-2px)}.dashboard__certificates h2{font-size:1.6rem;margin-bottom:1.2rem;text-align:center}.certificate-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.certificate-card{background:#fff;border:1px solid #e5e7eb;border-radius:1rem;box-shadow:0 2px 6px #0000000d;cursor:pointer;padding:1.2rem 1rem;text-align:center;transition:all .3s ease,transform .2s}.certificate-card.completed{background:#eff6ff;border-color:#3b82f6;opacity:1}.certificate-card.in-progress{opacity:.8}.certificate-card:hover{border-color:#3b82f6;transform:translateY(-3px)}.certificate-card .certificate-icon{font-size:2rem;margin-bottom:.5rem}.certificate-details{border:2px solid #3b82f6;border-radius:10px;box-shadow:0 12px 30px #00000026;font-family:Georgia,serif;margin:2rem auto;max-width:750px;padding:2.5rem;position:relative;text-align:center}.certificate-watermark{color:#3b82f614;font-size:6rem;font-weight:700;left:50%;pointer-events:none;position:absolute;top:50%;transform:translate(-50%,-50%) rotate(-25deg)}.certificate-details h3{font-size:1.8rem;font-weight:700;margin:.8rem 0}.certificate-details p{color:#1f2937;font-size:1.1rem;margin:.4rem 0}.certificate-logo{display:block;height:auto;margin:20px auto 10px;position:relative;width:120px}.certificate-stamp-container{bottom:90px;height:120px;pointer-events:none;position:absolute;right:70px;width:120px;z-index:10}.certificate-stamp,.certificate-stamp-container{align-items:center;display:flex;justify-content:center}.certificate-stamp{background:#ffffff1a;border:4px solid #d4af37;border-radius:50%;box-sizing:border-box;color:#d4af37;font-size:14px;font-weight:700;height:100%;line-height:1.2;padding:10px;text-align:center;transform:rotate(-20deg);width:100%}.dashboard__quick-actions{margin-top:3rem}.dashboard__quick-actions h2{font-size:1.5rem;font-weight:600;margin-bottom:1.2rem;text-align:center}.dashboard__quick-actions-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}.quick-action-card{align-items:center;background:#fff;border:1px solid #e5e7eb;border-radius:1rem;cursor:pointer;display:flex;padding:1.2rem 1.5rem;transition:all .3s ease,transform .2s}.quick-action-card:hover{background:#f9fafc;transform:translateY(-4px)}.quick-action-card span{font-size:1.8rem;margin-right:.8rem}.dashboard-loading{align-items:center;display:flex;height:100vh;justify-content:center;text-align:center}.spinner{border:3px solid #e5e7eb;border-top-color:#3b82f6;margin:0 auto 1rem}@media (max-width:768px){.dashboard__quick-actions-grid{grid-template-columns:1fr}.dashboard__welcome h1{font-size:1.6rem}.dashboard__stats-tabs{gap:.5rem}}:root{--primary-color:var(--color-primary);--primary-dark:var(--color-primary-hover);--primary-light:var(--color-primary-active);--secondary-color:var(--color-secondary);--success-color:var(--color-success);--danger-color:var(--color-error);--warning-color:var(--color-warning);--info-color:var(--color-info);--bg-primary:var(--color-surface);--bg-secondary:var(--color-background);--bg-tertiary:var(--color-secondary);--bg-dark:var(--color-charcoal-800);--text-primary:var(--color-text);--text-secondary:var(--color-text-secondary);--text-tertiary:rgba(var(--color-slate-500-rgb),0.7);--border-color:var(--color-border);--border-radius:var(--radius-lg);--border-radius-sm:var(--radius-base);--border-radius-lg:var(--radius-lg);--shadow-sm:var(--shadow-sm);--shadow-md:var(--shadow-md);--shadow-lg:var(--shadow-lg);--shadow-xl:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;--transition:all var(--duration-normal) var(--ease-standard)}.admin-container{background:linear-gradient(135deg,#fcfcf9,#5e52401f);background:linear-gradient(135deg,var(--color-background) 0,var(--color-secondary) 100%);font-family:FKGroteskNeue,Geist,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-family:var(--font-family-base);min-height:100vh;padding:32px;padding:var(--space-32)}.admin-header{align-items:center;display:flex;flex-wrap:wrap;gap:24px;gap:var(--space-24);justify-content:space-between;margin-bottom:32px;margin-bottom:var(--space-32)}.admin-header h1{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#21808d,#1a6873);background:linear-gradient(135deg,var(--color-primary) 0,var(--color-teal-700) 100%);-webkit-background-clip:text;background-clip:text;color:#13343b;color:var(--color-text);font-size:30px;font-size:var(--font-size-4xl);font-weight:600;font-weight:var(--font-weight-bold);margin-bottom:8px;margin-bottom:var(--space-8)}.subtitle{color:#626c71;color:var(--color-text-secondary);font-size:14px;font-size:var(--font-size-base);font-weight:400;font-weight:var(--font-weight-normal)}.header-stats{display:flex;gap:16px;gap:var(--space-16)}.stat-card{align-items:center;background:#fffffd;background:var(--color-surface);border:1px solid #5e52401f;border:1px solid var(--color-card-border);border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #0000000a,0 2px 4px -1px #00000005;box-shadow:var(--shadow-md);display:flex;flex-direction:column;gap:8px;gap:var(--space-8);min-width:140px;padding:24px 32px;padding:var(--space-24) var(--space-32)}.stat-number{color:#21808d;color:var(--color-primary);font-size:30px;font-size:var(--font-size-4xl);font-weight:600;font-weight:var(--font-weight-bold)}.stat-label{color:#626c71;color:var(--color-text-secondary);font-size:12px;font-size:var(--font-size-sm);letter-spacing:-.01em;letter-spacing:var(--letter-spacing-tight);text-transform:uppercase}.stat-label,.success-toast{font-weight:550;font-weight:var(--font-weight-semibold)}.success-toast{animation:slideInRight .25s cubic-bezier(.16,1,.3,1);animation:slideInRight var(--duration-normal) var(--ease-standard);background:#21808d;background:var(--color-success);border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 10px 15px -3px #0000000a,0 4px 6px -2px #00000005;box-shadow:var(--shadow-lg);color:#fffffd;color:var(--color-surface);padding:16px 24px;padding:var(--space-16) var(--space-24);position:fixed;right:32px;right:var(--space-32);top:32px;top:var(--space-32);z-index:10000}@keyframes slideInRight{0%{opacity:0;transform:translateX(100%)}to{opacity:1;transform:translateX(0)}}.new-course-section{background:#fffffd;background:var(--color-surface);border:1px solid #5e52401f;border:1px solid var(--color-card-border);border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #0000000a,0 2px 4px -1px #00000005;box-shadow:var(--shadow-md);margin-bottom:32px;margin-bottom:var(--space-32);padding:32px;padding:var(--space-32)}.new-course-section h2{color:#13343b;color:var(--color-text);font-size:18px;font-size:var(--font-size-xl);font-weight:600;font-weight:var(--font-weight-bold);margin-bottom:16px;margin-bottom:var(--space-16)}.new-course-form{align-items:center}.filters-section,.new-course-form{display:flex;gap:16px;gap:var(--space-16)}.filters-section{flex-wrap:wrap;margin-bottom:32px;margin-bottom:var(--space-32)}.search-input{background:#fffffd;background:var(--color-surface);border:1px solid #5e524033;border:1px solid var(--color-border);border-radius:8px;border-radius:var(--radius-base);color:#13343b;color:var(--color-text);flex:1 1;font-family:FKGroteskNeue,Geist,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-family:var(--font-family-base);font-size:14px;font-size:var(--font-size-base);min-width:250px;padding:12px 20px;padding:var(--space-12) var(--space-20);transition:all .25s cubic-bezier(.16,1,.3,1);transition:var(--transition)}.search-input:focus{border-color:#21808d;border-color:var(--color-primary);box-shadow:0 0 0 3px #21808d66;box-shadow:var(--focus-ring);outline:2px solid #21808d;outline:var(--focus-outline)}.filter-select{background:#fffffd;background:var(--color-surface);border:1px solid #5e524033;border:1px solid var(--color-border);border-radius:8px;border-radius:var(--radius-base);color:#13343b;color:var(--color-text);cursor:pointer;font-family:FKGroteskNeue,Geist,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-family:var(--font-family-base);font-size:14px;font-size:var(--font-size-base);min-width:200px;padding:12px 20px;padding:var(--space-12) var(--space-20);transition:all .25s cubic-bezier(.16,1,.3,1);transition:var(--transition)}.filter-select:focus{border-color:#21808d;border-color:var(--color-primary);outline:2px solid #21808d;outline:var(--focus-outline)}.courses-grid{grid-gap:24px;grid-gap:var(--space-24);display:grid;gap:24px;gap:var(--space-24);grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.course-card{background:#fffffd;background:var(--color-surface);border:1px solid #5e52401f;border:1px solid var(--color-card-border);border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #0000000a,0 2px 4px -1px #00000005;box-shadow:var(--shadow-md);cursor:pointer;gap:16px;gap:var(--space-16);padding:24px;padding:var(--space-24);transition:all .25s cubic-bezier(.16,1,.3,1);transition:var(--transition)}.course-card:hover{border-color:#21808d;border-color:var(--color-primary);box-shadow:0 10px 15px -3px #0000000a,0 4px 6px -2px #00000005;box-shadow:var(--shadow-lg);transform:translateY(-4px)}.course-card-header{align-items:flex-start;display:flex;gap:16px;gap:var(--space-16);justify-content:space-between}.course-card-header h3{color:#13343b;color:var(--color-text);flex:1 1;font-size:18px;font-size:var(--font-size-xl);font-weight:600;font-weight:var(--font-weight-bold);line-height:1.2;line-height:var(--line-height-tight)}.course-description{-webkit-box-orient:vertical;-webkit-line-clamp:2;box-orient:vertical;line-clamp:2;color:#626c71;color:var(--color-text-secondary);display:-webkit-box;display:box;font-size:14px;font-size:var(--font-size-base);line-height:1.5;line-height:var(--line-height-normal);overflow:hidden}.course-stats{border-top:1px solid #5e524033;border-top:1px solid var(--color-border);display:flex;font-size:12px;font-size:var(--font-size-sm);gap:24px;gap:var(--space-24);padding-top:16px;padding-top:var(--space-16)}.course-stats span{color:#626c71;color:var(--color-text-secondary)}.course-stats strong{color:#13343b;color:var(--color-text);font-weight:550;font-weight:var(--font-weight-semibold)}.course-actions{border-top:1px solid #5e524033;border-top:1px solid var(--color-border);display:flex;gap:8px;gap:var(--space-8);padding-top:16px;padding-top:var(--space-16)}.badge{border-radius:9999px;border-radius:var(--radius-full);display:inline-block;font-size:11px;font-size:var(--font-size-xs);font-weight:550;font-weight:var(--font-weight-semibold);letter-spacing:-.01em;letter-spacing:var(--letter-spacing-tight);padding:6px 12px;padding:var(--space-6) var(--space-12);text-transform:uppercase;white-space:nowrap}.badge-programming{background:#3b82f614;background:var(--color-bg-1);color:#21808d;color:var(--color-primary)}.badge-design{background:#ec489914;background:var(--color-bg-7);color:#c0152f;color:var(--color-red-500)}.badge-business{background:#22c55e14;background:var(--color-bg-3);color:#21808d;color:var(--color-success)}.badge-other{background:#5e52401f;background:var(--color-secondary);color:#626c71;color:var(--color-text-secondary)}.btn{font-family:FKGroteskNeue,Geist,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-family:var(--font-family-base);font-weight:550;font-weight:var(--font-weight-semibold);gap:8px;gap:var(--space-8);padding:var(--space-12) var(--space-24);white-space:nowrap}.btn-primary{background:#21808d;background:var(--color-primary);color:#fcfcf9;color:var(--color-btn-primary-text)}.btn-primary:hover:not(:disabled){background:#1d7480;background:var(--color-primary-hover);box-shadow:0 10px 15px -3px #0000000a,0 4px 6px -2px #00000005;box-shadow:var(--shadow-lg);transform:translateY(-2px)}.btn-secondary{background:#5e52401f;background:var(--color-secondary);color:#13343b;color:var(--color-text)}.btn-secondary:hover:not(:disabled){background:#5e524033;background:var(--color-secondary-hover)}.btn-danger{background:#c0152f;background:var(--color-error);color:#fffffd;color:var(--color-surface)}.btn-danger:hover:not(:disabled){background:#c0152f;background:var(--color-red-500);box-shadow:0 10px 15px -3px #0000000a,0 4px 6px -2px #00000005;box-shadow:var(--shadow-lg);transform:translateY(-2px)}.btn-small{font-size:12px;font-size:var(--font-size-sm);padding:8px 16px;padding:var(--space-8) var(--space-16)}.btn-large{font-size:16px;font-size:var(--font-size-lg);padding:16px 32px;padding:var(--space-16) var(--space-32)}.btn-icon,.btn-icon-only{font-size:18px;font-size:var(--font-size-xl)}.btn-icon-only{align-items:center;background:#0000;border:none;border-radius:8px;border-radius:var(--radius-base);color:#626c71;color:var(--color-text-secondary);cursor:pointer;display:inline-flex;height:36px;justify-content:center;padding:8px;padding:var(--space-8);transition:all .25s cubic-bezier(.16,1,.3,1);transition:var(--transition);width:36px}.btn-icon-only:hover{background:#5e52401f;background:var(--color-secondary)}.btn-icon-only.danger:hover{background:#c0152f1a;background:rgba(var(--color-error-rgb),.1);color:#c0152f;color:var(--color-error)}.input-modern{background:#fffffd;background:var(--color-surface);border:1px solid #5e524033;border:1px solid var(--color-border);border-radius:8px;border-radius:var(--radius-base);color:#13343b;color:var(--color-text);font-family:FKGroteskNeue,Geist,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-family:var(--font-family-base);font-size:14px;font-size:var(--font-size-base);padding:12px 20px;padding:var(--space-12) var(--space-20);transition:all .25s cubic-bezier(.16,1,.3,1);transition:var(--transition);width:100%}.input-modern:focus{border-color:#21808d;border-color:var(--color-primary);box-shadow:0 0 0 3px #21808d66;box-shadow:var(--focus-ring);outline:2px solid #21808d;outline:var(--focus-outline)}.input-modern::placeholder{color:#626c71;color:var(--color-text-secondary)}textarea.input-modern{min-height:100px;resize:vertical}.loading-state{align-items:center;display:flex;flex-direction:column;gap:16px;gap:var(--space-16);justify-content:center;padding:4rem 32px;padding:4rem var(--space-32)}.spinner{animation:spin .8s linear infinite;border:4px solid #5e524033;border-top-color:#21808d;border:4px solid var(--color-border);border-top-color:var(--color-primary);height:48px;width:48px}.empty-state{background:#fffffd;background:var(--color-surface);border:1px solid #5e52401f;border:1px solid var(--color-card-border);border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #0000000a,0 2px 4px -1px #00000005;box-shadow:var(--shadow-md);padding:4rem 32px;padding:4rem var(--space-32);text-align:center}.empty-icon{color:#626c71;color:var(--color-text-secondary);font-size:4rem;margin-bottom:16px;margin-bottom:var(--space-16)}.empty-state h3{color:#13343b;color:var(--color-text);font-size:18px;font-size:var(--font-size-xl);font-weight:600;font-weight:var(--font-weight-bold);margin-bottom:8px;margin-bottom:var(--space-8)}.empty-state p{color:#626c71;color:var(--color-text-secondary);font-size:14px;font-size:var(--font-size-base)}.empty-state-small{background:#fcfcf9;background:var(--color-background);border-radius:8px;border-radius:var(--radius-base);margin:16px 0;margin:var(--space-16) 0;padding:32px;padding:var(--space-32);text-align:center}.empty-state-small p{color:#626c71;color:var(--color-text-secondary)}.breadcrumb,.empty-state-small p{font-size:14px;font-size:var(--font-size-base)}.breadcrumb{align-items:center;display:flex;gap:12px;gap:var(--space-12);margin-bottom:32px;margin-bottom:var(--space-32)}.breadcrumb-link{background:#fffffd;background:var(--color-surface);border:1px solid #5e524033;border:1px solid var(--color-border);border-radius:8px;border-radius:var(--radius-base);color:#21808d;color:var(--color-primary);cursor:pointer;font-size:14px;font-size:var(--font-size-base);font-weight:550;font-weight:var(--font-weight-semibold);padding:10px 20px;padding:var(--space-10) var(--space-20);text-decoration:none;transition:all .25s cubic-bezier(.16,1,.3,1);transition:var(--transition)}.breadcrumb-link:hover{background:#21808d;background:var(--color-primary);border-color:#21808d;border-color:var(--color-primary);color:#fcfcf9;color:var(--color-btn-primary-text)}.breadcrumb-separator{color:#626c71;color:var(--color-text-secondary)}.course-details-view{margin:0 auto;max-width:1400px}.details-container{display:flex;flex-direction:column;gap:32px;gap:var(--space-32)}.section-card{background:#fffffd;background:var(--color-surface);border:1px solid #5e52401f;border:1px solid var(--color-card-border);border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #0000000a,0 2px 4px -1px #00000005;box-shadow:var(--shadow-md);padding:32px;padding:var(--space-32)}.section-card h2{align-items:center;color:#13343b;color:var(--color-text);display:flex;font-size:20px;font-size:var(--font-size-2xl);font-weight:600;font-weight:var(--font-weight-bold);gap:12px;gap:var(--space-12)}.form-grid,.section-card h2{margin-bottom:24px;margin-bottom:var(--space-24)}.form-grid{grid-gap:24px;grid-gap:var(--space-24);display:grid;gap:24px;gap:var(--space-24);grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.form-group{display:flex;flex-direction:column;gap:8px;gap:var(--space-8)}.form-group label{color:#13343b;color:var(--color-text);font-size:12px;font-size:var(--font-size-sm);font-weight:550;font-weight:var(--font-weight-semibold);letter-spacing:-.01em;letter-spacing:var(--letter-spacing-tight);text-transform:uppercase}.add-unit-form{grid-gap:16px;grid-gap:var(--space-16);background:#fcfcf9;background:var(--color-background);border-radius:8px;border-radius:var(--radius-base);display:grid;gap:16px;gap:var(--space-16);grid-template-columns:1fr 1fr auto;margin-bottom:32px;margin-bottom:var(--space-32);padding:24px;padding:var(--space-24)}.units-list{display:flex;flex-direction:column;gap:24px;gap:var(--space-24)}.unit-card{background:#fcfcf9;background:var(--color-background);border:1px solid #5e524033;border:1px solid var(--color-border);border-radius:12px;border-radius:var(--radius-lg);padding:24px;padding:var(--space-24);transition:all .25s cubic-bezier(.16,1,.3,1);transition:var(--transition)}.unit-card:hover{border-color:#21808d;border-color:var(--color-primary)}.unit-header{align-items:flex-start;gap:16px;gap:var(--space-16);margin-bottom:24px;margin-bottom:var(--space-24)}.unit-number{background:#21808d;background:var(--color-primary);border-radius:9999px;border-radius:var(--radius-full);color:#fcfcf9;color:var(--color-btn-primary-text);display:inline-block;font-size:11px;font-size:var(--font-size-xs);letter-spacing:-.01em;letter-spacing:var(--letter-spacing-tight);margin-bottom:12px;margin-bottom:var(--space-12);padding:4px 12px;padding:var(--space-4) var(--space-12);text-transform:uppercase}.unit-info h3,.unit-number{font-weight:600;font-weight:var(--font-weight-bold)}.unit-info 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#00000008;--duration-fast:150ms;--duration-normal:250ms;--ease-standard:cubic-bezier(0.16,1,0.3,1);--container-sm:640px;--container-md:768px;--container-lg:1024px;--container-xl:1280px}@media (prefers-color-scheme:dark){:root{--color-gray-400-rgb:119,124,124;--color-teal-300-rgb:50,184,198;--color-gray-300-rgb:167,169,169;--color-gray-200-rgb:245,245,245;--color-bg-1:#1d4ed826;--color-bg-2:#b4530926;--color-bg-3:#15803d26;--color-bg-4:#b91c1c26;--color-bg-5:#6b21a826;--color-bg-6:#c2410c26;--color-bg-7:#be185d26;--color-bg-8:#0891b226;--color-background:var(--color-charcoal-700);--color-surface:var(--color-charcoal-800);--color-text:var(--color-gray-200);--color-text-secondary:rgba(var(--color-gray-300-rgb),0.7);--color-primary:var(--color-teal-300);--color-primary-hover:var(--color-teal-400);--color-primary-active:var(--color-teal-800);--color-secondary:rgba(var(--color-gray-400-rgb),0.15);--color-secondary-hover:rgba(var(--color-gray-400-rgb),0.25);--color-secondary-active:rgba(var(--color-gray-400-rgb),0.3);--color-border:rgba(var(--color-gray-400-rgb),0.3);--color-error:var(--color-red-400);--color-success:var(--color-teal-300);--color-warning:var(--color-orange-400);--color-info:var(--color-gray-300);--color-focus-ring:rgba(var(--color-teal-300-rgb),0.4);--color-btn-primary-text:var(--color-slate-900);--color-card-border:rgba(var(--color-gray-400-rgb),0.2);--color-card-border-inner:rgba(var(--color-gray-400-rgb),0.15);--shadow-inset-sm:inset 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6-6'/%3E%3C/svg%3E");--color-success-rgb:var(--color-teal-300-rgb);--color-error-rgb:var(--color-red-400-rgb);--color-warning-rgb:var(--color-orange-400-rgb);--color-info-rgb:var(--color-gray-300-rgb)}}[data-color-scheme=dark]{--color-gray-400-rgb:119,124,124;--color-teal-300-rgb:50,184,198;--color-gray-300-rgb:167,169,169;--color-gray-200-rgb:245,245,245;--color-bg-1:#1d4ed826;--color-bg-2:#b4530926;--color-bg-3:#15803d26;--color-bg-4:#b91c1c26;--color-bg-5:#6b21a826;--color-bg-6:#c2410c26;--color-bg-7:#be185d26;--color-bg-8:#0891b226;--color-background:var(--color-charcoal-700);--color-surface:var(--color-charcoal-800);--color-text:var(--color-gray-200);--color-text-secondary:rgba(var(--color-gray-300-rgb),0.7);--color-primary:var(--color-teal-300);--color-primary-hover:var(--color-teal-400);--color-primary-active:var(--color-teal-800);--color-secondary:rgba(var(--color-gray-400-rgb),0.15);--color-secondary-hover:rgba(var(--color-gray-400-rgb),0.25);--color-secondary-active:rgba(var(--color-gray-400-rgb),0.3);--color-border:rgba(var(--color-gray-400-rgb),0.3);--color-error:var(--color-red-400);--color-success:var(--color-teal-300);--color-warning:var(--color-orange-400);--color-info:var(--color-gray-300);--color-focus-ring:rgba(var(--color-teal-300-rgb),0.4);--color-btn-primary-text:var(--color-slate-900);--color-card-border:rgba(var(--color-gray-400-rgb),0.15);--color-card-border-inner:rgba(var(--color-gray-400-rgb),0.15);--shadow-inset-sm:inset 0 1px 0 #ffffff1a,inset 0 -1px 0 #00000026;--color-border-secondary:rgba(var(--color-gray-400-rgb),0.2);--color-select-caret:rgba(var(--color-gray-200-rgb),0.8);--focus-ring:0 0 0 3px var(--color-focus-ring);--focus-outline:2px solid var(--color-primary);--status-bg-opacity:0.15;--status-border-opacity:0.25;--select-caret-light:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");--select-caret-dark:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");--color-success-rgb:var(--color-teal-300-rgb);--color-error-rgb:var(--color-red-400-rgb);--color-warning-rgb:var(--color-orange-400-rgb);--color-info-rgb:var(--color-gray-300-rgb)}[data-color-scheme=light]{--color-brown-600-rgb:94,82,64;--color-teal-500-rgb:33,128,141;--color-slate-900-rgb:19,52,59;--color-background:var(--color-cream-50);--color-surface:var(--color-cream-100);--color-text:var(--color-slate-900);--color-text-secondary:var(--color-slate-500);--color-primary:var(--color-teal-500);--color-primary-hover:var(--color-teal-600);--color-primary-active:var(--color-teal-700);--color-secondary:rgba(var(--color-brown-600-rgb),0.12);--color-secondary-hover:rgba(var(--color-brown-600-rgb),0.2);--color-secondary-active:rgba(var(--color-brown-600-rgb),0.25);--color-border:rgba(var(--color-brown-600-rgb),0.2);--color-btn-primary-text:var(--color-cream-50);--color-card-border:rgba(var(--color-brown-600-rgb),0.12);--color-card-border-inner:rgba(var(--color-brown-600-rgb),0.12);--color-error:var(--color-red-500);--color-success:var(--color-teal-500);--color-warning:var(--color-orange-500);--color-info:var(--color-slate-500);--color-focus-ring:rgba(var(--color-teal-500-rgb),0.4);--color-success-rgb:var(--color-teal-500-rgb);--color-error-rgb:var(--color-red-500-rgb);--color-warning-rgb:var(--color-orange-500-rgb);--color-info-rgb:var(--color-slate-500-rgb)}html{-webkit-font-smoothing:antialiased;background-color:#fcfcf9;background-color:var(--color-background);box-sizing:border-box;color:#13343b;color:var(--color-text);font-family:FKGroteskNeue,Geist,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-family:var(--font-family-base);font-size:14px;font-size:var(--font-size-base);line-height:1.5;line-height:var(--line-height-normal)}body{margin:0;padding:0}*,:after,:before{box-sizing:inherit}h1,h2,h3,h4,h5,h6{color:#13343b;color:var(--color-text);font-weight:550;font-weight:var(--font-weight-semibold);letter-spacing:-.01em;letter-spacing:var(--letter-spacing-tight);line-height:1.2;line-height:var(--line-height-tight);margin:0}h1{font-size:30px;font-size:var(--font-size-4xl)}h2{font-size:24px;font-size:var(--font-size-3xl)}h3{font-size:20px;font-size:var(--font-size-2xl)}h4{font-size:18px;font-size:var(--font-size-xl)}h5{font-size:16px;font-size:var(--font-size-lg)}h6{font-size:14px;font-size:var(--font-size-md)}p{margin:0 0 16px;margin:0 0 var(--space-16) 0}a{color:#21808d;color:var(--color-primary);text-decoration:none;transition:color .15s cubic-bezier(.16,1,.3,1);transition:color var(--duration-fast) var(--ease-standard)}a:hover{color:#1d7480;color:var(--color-primary-hover)}code,pre{background-color:#5e52401f;background-color:var(--color-secondary);border-radius:6px;border-radius:var(--radius-sm);font-family:Berkeley Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-family:var(--font-family-mono);font-size:13.3px;font-size:calc(var(--font-size-base)*.95)}code{padding:1px 4px;padding:var(--space-1) var(--space-4)}pre{border:1px solid #5e524033;border:1px solid var(--color-border);margin:16px 0;margin:var(--space-16) 0;overflow:auto;padding:16px;padding:var(--space-16)}pre code{background:none;padding:0}.btn{border-radius:var(--radius-base);font-size:14px;font-size:var(--font-size-base);font-weight:500;line-height:1.5;padding:8px 16px;padding:var(--space-8) var(--space-16);position:relative;transition:all .25s cubic-bezier(.16,1,.3,1);transition:all var(--duration-normal) var(--ease-standard)}.btn:focus-visible{box-shadow:0 0 0 3px #21808d66;box-shadow:var(--focus-ring);outline:none}.btn--primary{background:#21808d;background:var(--color-primary);color:#fcfcf9;color:var(--color-btn-primary-text)}.btn--primary:hover{background:#1d7480;background:var(--color-primary-hover)}.btn--primary:active{background:#1a6873;background:var(--color-primary-active)}.btn--secondary{background:#5e52401f;background:var(--color-secondary);color:#13343b;color:var(--color-text)}.btn--secondary:hover{background:#5e524033;background:var(--color-secondary-hover)}.btn--secondary:active{background:#5e524040;background:var(--color-secondary-active)}.btn--outline{background:#0000;border:1px solid #5e524033;border:1px solid var(--color-border);color:#13343b;color:var(--color-text)}.btn--outline:hover{background:#5e52401f;background:var(--color-secondary)}.btn--sm{border-radius:6px;border-radius:var(--radius-sm);font-size:12px;font-size:var(--font-size-sm);padding:4px 12px;padding:var(--space-4) var(--space-12)}.btn--lg{border-radius:10px;border-radius:var(--radius-md);font-size:16px;font-size:var(--font-size-lg);padding:10px 20px;padding:var(--space-10) var(--space-20)}.btn--full-width{width:100%}.btn:disabled{opacity:.5}.form-control{background-color:#fffffd;background-color:var(--color-surface);border:1px solid #5e524033;border:1px solid var(--color-border);border-radius:8px;border-radius:var(--radius-base);color:#13343b;color:var(--color-text);display:block;font-size:14px;font-size:var(--font-size-md);line-height:1.5;padding:8px 12px;padding:var(--space-8) var(--space-12);transition:border-color .15s cubic-bezier(.16,1,.3,1),box-shadow .15s cubic-bezier(.16,1,.3,1);transition:border-color var(--duration-fast) var(--ease-standard),box-shadow var(--duration-fast) var(--ease-standard);width:100%}textarea.form-control{font-family:FKGroteskNeue,Geist,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-family:var(--font-family-base);font-size:14px;font-size:var(--font-size-base)}select.form-control{-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-image:var(--select-caret-light);background-position:right 12px center;background-position:right var(--space-12) center;background-repeat:no-repeat;background-size:16px;padding:8px 12px;padding:var(--space-8) var(--space-12);padding-right:32px;padding-right:var(--space-32)}@media (prefers-color-scheme:dark){select.form-control{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-image:var(--select-caret-dark)}}[data-color-scheme=dark] select.form-control{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-image:var(--select-caret-dark)}[data-color-scheme=light] select.form-control{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-image:var(--select-caret-light)}.form-control:focus{border-color:#21808d;border-color:var(--color-primary);outline:2px solid #21808d;outline:var(--focus-outline)}.form-label{display:block;font-size:12px;font-size:var(--font-size-sm);font-weight:500;font-weight:var(--font-weight-medium);margin-bottom:8px;margin-bottom:var(--space-8)}.form-group{margin-bottom:16px;margin-bottom:var(--space-16)}.card{background-color:#fffffd;background-color:var(--color-surface);border:1px solid #5e52401f;border:1px solid var(--color-card-border);border-radius:12px;border-radius:var(--radius-lg);box-shadow:0 1px 3px #0000000a,0 1px 2px #00000005;box-shadow:var(--shadow-sm);overflow:hidden;transition:box-shadow .25s cubic-bezier(.16,1,.3,1);transition:box-shadow var(--duration-normal) var(--ease-standard)}.card:hover{box-shadow:0 4px 6px -1px #0000000a,0 2px 4px -1px #00000005;box-shadow:var(--shadow-md)}.card__body,.card__footer,.card__header{padding:16px;padding:var(--space-16)}.card__footer,.card__header{border-bottom:1px solid #5e52401f;border-bottom:1px solid var(--color-card-border-inner)}.status{align-items:center;border-radius:9999px;border-radius:var(--radius-full);display:inline-flex;font-size:12px;font-size:var(--font-size-sm);font-weight:500;font-weight:var(--font-weight-medium);padding:6px 12px;padding:var(--space-6) var(--space-12)}.status--success{background-color:#21808d26;background-color:rgba(var(--color-success-rgb,33,128,141),var(--status-bg-opacity));border:1px solid #21808d40;border:1px solid rgba(var(--color-success-rgb,33,128,141),var(--status-border-opacity));color:#21808d;color:var(--color-success)}.status--error{background-color:#c0152f26;background-color:rgba(var(--color-error-rgb,192,21,47),var(--status-bg-opacity));border:1px solid #c0152f40;border:1px solid rgba(var(--color-error-rgb,192,21,47),var(--status-border-opacity));color:#c0152f;color:var(--color-error)}.status--warning{background-color:#a84b2f26;background-color:rgba(var(--color-warning-rgb,168,75,47),var(--status-bg-opacity));border:1px solid #a84b2f40;border:1px solid rgba(var(--color-warning-rgb,168,75,47),var(--status-border-opacity));color:#a84b2f;color:var(--color-warning)}.status--info{background-color:#626c7126;background-color:rgba(var(--color-info-rgb,98,108,113),var(--status-bg-opacity));border:1px solid #626c7140;border:1px solid rgba(var(--color-info-rgb,98,108,113),var(--status-border-opacity));color:#626c71;color:var(--color-info)}.container{margin-left:auto;margin-right:auto;padding-left:16px;padding-left:var(--space-16);padding-right:16px;padding-right:var(--space-16);width:100%}@media (min-width:640px){.container{max-width:640px;max-width:var(--container-sm)}}@media (min-width:768px){.container{max-width:768px;max-width:var(--container-md)}}@media (min-width:1024px){.container{max-width:1024px;max-width:var(--container-lg)}}@media (min-width:1280px){.container{max-width:1280px;max-width:var(--container-xl)}}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-4{gap:4px;gap:var(--space-4)}.gap-8{gap:8px;gap:var(--space-8)}.gap-16{gap:16px;gap:var(--space-16)}.m-0{margin:0}.mt-8{margin-top:8px;margin-top:var(--space-8)}.mb-8{margin-bottom:8px;margin-bottom:var(--space-8)}.mx-8{margin-left:8px;margin-left:var(--space-8);margin-right:8px;margin-right:var(--space-8)}.my-8{margin-bottom:8px;margin-bottom:var(--space-8);margin-top:8px;margin-top:var(--space-8)}.p-0{padding:0}.py-8{padding-bottom:8px;padding-bottom:var(--space-8);padding-top:8px;padding-top:var(--space-8)}.px-8{padding-left:8px;padding-left:var(--space-8);padding-right:8px;padding-right:var(--space-8)}.py-16{padding-bottom:16px;padding-bottom:var(--space-16);padding-top:16px;padding-top:var(--space-16)}.px-16{padding-left:16px;padding-left:var(--space-16);padding-right:16px;padding-right:var(--space-16)}.block{display:block}.hidden{display:none}.sr-only{clip:rect(0,0,0,0);border-width:0;height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;white-space:nowrap;width:1px}:focus-visible{outline:2px 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1;flex-direction:column;gap:4px;gap:var(--space-4)}.content-btn-title{color:#13343b;color:var(--color-text);font-size:14px;font-size:var(--font-size-base);font-weight:600;font-weight:var(--font-weight-bold);line-height:1.2;line-height:var(--line-height-tight)}.content-btn-count{color:#626c71;color:var(--color-text-secondary);font-size:12px;font-size:var(--font-size-sm);font-weight:500;font-weight:var(--font-weight-medium)}.explanation-btn{border-color:#21808d;border-color:var(--color-primary)}.explanation-btn,.explanation-btn:hover{background-color:#3b82f614;background-color:var(--color-bg-1)}.explanation-btn:hover{border-color:#1d7480;border-color:var(--color-primary-hover)}.example-btn,.example-btn:hover{background-color:#f59e0b14;background-color:var(--color-bg-2);border-color:#a84b2f;border-color:var(--color-warning)}.quiz-btn,.quiz-btn:hover{background-color:#ec489914;background-color:var(--color-bg-7);border-color:#c0152f;border-color:var(--color-error)}.coding-btn,.coding-btn:hover{background-color:#22c55e14;background-color:var(--color-bg-3);border-color:#21808d;border-color:var(--color-success)}@media 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