*{margin:0;padding:0;box-sizing:border-box}:root{--bg1: #89f7fe;--bg2: #66a6ff;--ink: #2c3e50;--card: #ffffff;--accent: #3498db;--accent-dark: #2d7fb7;--muted: #6b7c93;--shadow: 0 10px 25px rgba(0, 0, 0, .15);--radius: 14px;--radius-sm: 10px;--nav-desktop: rgba(15, 60, 90, .9);--nav-mobile: linear-gradient(135deg, #8743cf, #2575fc)}html,body,#root{height:100%}body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(1000px 600px at 30% 20%,#ffffff40,transparent),linear-gradient(135deg,#a8edea,#fed6e2);color:var(--ink)}.app{min-height:100%;display:flex;flex-direction:column}.navbar{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:14px 22px;background:linear-gradient(135deg,#b3e4c2,#77a7a0,#456a6e,#44727e);background-size:300% 300%;animation:navGradient 8s ease infinite;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);color:#fff;box-shadow:var(--shadow);z-index:10;transition:background .3s ease}.logo{font-size:20px;font-weight:800;letter-spacing:1px;background:linear-gradient(90deg,#fff,#ffeaa7,#81ecec);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:logoShine 4s linear infinite}.nav-links{display:flex;flex-wrap:wrap;gap:10px}.nav-button{appearance:none;border:0;padding:10px 14px;border-radius:999px;background:#ffffff18;color:#fff;cursor:pointer;font-size:clamp(14px,1.8vw,16px);transition:transform .12s ease,background .2s ease,box-shadow .2s ease}.nav-button:hover{background:#ffffff30;transform:translateY(-1px)}.nav-button.active{background:#fff;color:#34495e}.page{flex:1;display:grid;place-items:center;padding:clamp(16px,4vw,32px);text-align:center}h1{font-size:clamp(24px,5vw,40px);line-height:1.1;margin-bottom:8px}.subtitle{color:var(--muted);margin-bottom:18px;font-size:clamp(14px,2vw,18px)}button,.start-btn,.secondary{appearance:none;border:0;border-radius:var(--radius-sm);padding:12px 18px;background:var(--accent);color:#fff;font-weight:600;cursor:pointer;font-size:clamp(14px,2vw,16px);transition:transform .12s ease,box-shadow .2s ease,background .2s ease,opacity .2s;box-shadow:0 6px 16px #3498db59}button:hover,.start-btn:hover{background:var(--accent-dark);transform:translateY(-2px)}button:active,.start-btn:active{transform:translateY(0)}.secondary{background:#ecf0f1;color:#2c3e50;box-shadow:0 6px 16px #0000001f}.secondary:hover{background:#e1e7ea}.card{width:min(560px,92vw);background:var(--card);border-radius:var(--radius);padding:clamp(18px,4vw,26px);box-shadow:var(--shadow);text-align:left;animation:logoShine 4s linear infinite;animation:pop .35s ease}.card h2{margin-bottom:16px;font-size:clamp(18px,2.5vw,22px)}.options{display:grid;gap:12px}.options button{text-align:left;width:100%;background:#f7fbff;color:#0f2940;border:1px solid #dce8f5;font-size:clamp(14px,2vw,16px)}.options button:hover{background:#eef6ff;transform:translateY(-1px)}.result .score{margin:8px 0 16px;font-size:clamp(16px,2vw,20px)}.actions{display:flex;gap:10px;flex-wrap:wrap}@keyframes pop{0%{transform:translateY(6px) scale(.98);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}@media (max-width: 768px){.navbar{flex-direction:column;align-items:flex-start}.nav-links{justify-content:flex-start}.card{width:100%}}@media (max-width: 480px){.navbar{padding:14px 16px;background:linear-gradient(135deg,#b3e4c2,#77a7a0,#456a6e,#44727e);background-size:300% 300%;animation:navGradient 8s ease infinite;border-radius:0 0 18px 18px;box-shadow:0 6px 18px #00000040;flex-direction:column;align-items:center}.logo{font-size:20px;letter-spacing:1px;background:linear-gradient(90deg,#fff,#ffeaa7,#81ecec);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:logoShine 4s linear infinite}.nav-links{margin-top:10px;width:100%;display:flex;justify-content:space-around}.nav-button{flex:1;text-align:center;padding:10px 0;font-size:15px;font-weight:600;border-radius:12px;background:#ffffff26;color:#fff;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);transition:transform .2s ease,background .3s ease}.nav-button:hover{background:#ffffff4d;transform:translateY(-3px) scale(1.05)}.nav-button.active{background:#fff;color:#2d3436;font-weight:700}}@keyframes navGradient{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}@keyframes logoShine{0%{background-position:-200px}to{background-position:200px}}.progress-bar{width:90%;max-width:500px;height:8px;background-color:#e0e0e0;border-radius:6px;overflow:hidden;margin:15px auto 25px;box-shadow:inset 0 2px 4px #0000001a}.progress-fill{height:100%;background:linear-gradient(90deg,#4cafef,#2196f3);transition:width .3s ease-in-out}.input-box{padding:12px 14px;border:1px solid #ccc;border-radius:var(--radius-sm);font-size:16px;outline:none;width:100%;max-width:400px}.input-box:focus{border-color:var(--accent);box-shadow:0 0 6px #3498db66}.about-container{max-width:800px;margin:2rem auto;padding:2rem;background:#fff;border-radius:16px;box-shadow:0 4px 12px #0000001a;text-align:center}.about-container h1{font-size:clamp(20px,5vw,32px);color:#2c3e50;margin-bottom:1rem}.about-container p{font-size:clamp(14px,2.5vw,18px);line-height:1.6;color:#555;margin-bottom:1.5rem}.about-container ul{list-style-type:none;padding:0}.about-container li{font-size:clamp(14px,2.5vw,16px);margin:.5rem 0;padding:.6rem;background:#f8f9fa;border-radius:8px;transition:background .3s}.about-container li:hover{background:#eaf4ff}.about-container .highlight{font-weight:700;color:#07f}.signup-container{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;background:radial-gradient(1000px 600px at 30% 20%,#ffffff40,transparent),linear-gradient(135deg,#89f7fe,#66a6ff);padding:20px}.signup-card{background:var(--card);padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow);width:100%;max-width:420px;text-align:center}.signup-card h2{margin-bottom:1rem;font-size:1.6rem;color:var(--ink)}.signup-card .input-box{margin-bottom:1rem}.signup-card button{width:100%;margin-top:.5rem}