*{margin:0;padding:0;box-sizing:border-box}.skip-to-content{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;z-index:9999}.skip-to-content:focus{position:fixed;top:8px;left:8px;width:auto;height:auto;padding:12px 24px;background:var(--primary);color:#fff;font-size:14px;font-weight:600;border-radius:8px;text-decoration:none;box-shadow:0 4px 20px #0006}:root{--primary: #14b8a6;--primary-dark: #0d9488;--primary-light: #2dd4bf;--secondary: #0891b2;--accent: #06b6d4;--background: #0f1e3b;--surface: #162139;--surface-light: #1e2b45;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--border: #334155;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--gradient-1: linear-gradient(135deg, #0d9488 0%, #14b8a6 50%, #2dd4bf 100%);--gradient-2: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:radial-gradient(ellipse at center,#14254a,#0f1e3b 70%,#091225);background-attachment:fixed;color:var(--text-primary);min-height:100vh;line-height:1.6}#root{min-height:100vh}a{color:var(--primary-light);text-decoration:none;transition:color .2s}a:hover{color:var(--primary)}button{cursor:pointer;font-family:inherit;transition:all .2s ease}input,select,textarea{font-family:inherit}.container{max-width:1200px;margin:0 auto;padding:0 24px}.glass{background:#1e293bcc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.1)}.btn-primary{background:var(--gradient-1);color:#fff;border:none;padding:14px 32px;border-radius:12px;font-weight:600;font-size:16px;display:inline-flex;align-items:center;gap:8px}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 40px #14b8a666}.btn-secondary{background:transparent;color:var(--text-primary);border:2px solid var(--border);padding:12px 28px;border-radius:12px;font-weight:600;font-size:16px}.btn-secondary:hover{border-color:var(--primary);background:#14b8a61a}.card{background:var(--surface);border-radius:16px;border:1px solid var(--border);padding:24px}.badge{display:inline-flex;align-items:center;padding:6px 12px;border-radius:20px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.badge-basic{background:#14b8a633;color:var(--primary-light)}.badge-intermediate{background:#10b98133;color:var(--secondary)}.badge-advanced{background:#f59e0b33;color:var(--accent)}.badge-expert{background:#ef444433;color:var(--error)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-fade-in{animation:fadeIn .5s ease forwards}.animate-slide-in{animation:slideIn .5s ease forwards}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.animate-spin{animation:spin 1s linear infinite}.chat-container{height:calc(100vh - 80px);height:calc(100dvh - 80px)}@media(max-width:767px){.container{padding:0 16px}.card{padding:16px}.btn-primary,.btn-secondary{min-height:44px;padding:12px 20px}input,select,textarea{min-height:44px;font-size:16px}}@supports (padding: env(safe-area-inset-bottom)){body{padding-bottom:env(safe-area-inset-bottom)}}