:root{--bg-primary: #040b11;--bg-secondary: #0f1c24;--bg-card: #162630;--text-primary: #ffffff;--text-secondary: #94a3b8;--text-accent: #fbbf24;--primary: #f59e0b;--primary-hover: #d97706;--success: #22c55e;--error: #ef4444;--font-family: "Inter", system-ui, -apple-system, sans-serif;--radius: 16px;--transition: all .3s ease}.error-message{background-color:#ef44441a;color:#ef4444;padding:10px;border-radius:8px;margin-bottom:1rem;font-size:.9rem;text-align:center;border:1px solid rgba(239,68,68,.2)}.success-message{background-color:#22c55e1a;color:#22c55e;padding:10px;border-radius:8px;margin-bottom:1rem;font-size:.9rem;text-align:center;border:1px solid rgba(34,197,94,.2)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}button{cursor:pointer;font-family:inherit}.container{width:100%;margin:0 auto;padding:20px;min-height:100vh;display:flex;flex-direction:column}@media(min-width:1024px){.container{max-width:1200px}}@media(max-width:768px){.container{padding:15px}}.container-narrow{max-width:480px;margin:0 auto}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:var(--radius);border:none;font-weight:600;font-size:1rem;transition:var(--transition);width:100%}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px)}.btn-outline{background-color:transparent;border:2px solid var(--primary);color:var(--primary)}.btn-outline:hover{background-color:#6366f11a}.input-group{margin-bottom:16px;text-align:left}.input-label{display:block;margin-bottom:8px;color:var(--text-secondary);font-size:.9rem}.input-field{width:100%;padding:12px;border-radius:var(--radius);border:1px solid var(--bg-card);background-color:var(--bg-secondary);color:var(--text-primary);font-size:1rem;transition:var(--transition)}.input-field:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px #6366f133}.card{background-color:var(--bg-secondary);padding:24px;border-radius:var(--radius);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}h1,h2,h3{color:var(--text-primary);margin-bottom:1rem}a{color:var(--text-accent);text-decoration:none}a:hover{text-decoration:underline}.course-player-grid{display:flex;flex-direction:column;gap:20px}.player-container{background-color:#000;width:100%;border-radius:var(--radius);overflow:hidden;display:flex;align-items:center;justify-content:center;aspect-ratio:16/9;min-height:auto}.player-container video,.player-container iframe{height:100%;width:100%}@media(min-width:1024px){.course-player-grid{display:grid;grid-template-columns:1fr 350px;gap:30px}.player-container{min-height:500px}}.form-control{width:100%;padding:12px;border-radius:var(--radius);border:1px solid var(--bg-card);background-color:var(--bg-secondary);color:var(--text-primary);font-size:1rem;transition:var(--transition)}.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px #6366f133}.form-label{display:block;margin-bottom:8px;color:var(--text-secondary);font-size:.9rem}@media(max-width:768px){.desktop-search{display:none!important}}