:root{--bg-dark:#0f172a;--glass:#ffffff0d;--glass-border:#ffffff1a;--accent:#6366f1}body{background-color:var(--bg-dark);color:#fff;margin:0;font-family:Inter,-apple-system,sans-serif;overflow:hidden}.app-container{background:radial-gradient(circle at top,#1e293b 0%,#0f172a 100%);flex-direction:column;justify-content:center;align-items:center;min-height:100vh;display:flex}.glass-card{background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:24px;box-shadow:0 8px 32px #0000005e}.btn-nav{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:16px;padding:20px 40px;font-size:24px;font-weight:700;transition:transform .2s,background .2s;box-shadow:0 4px 15px #6366f14d}.btn-nav:active{transform:scale(.95)}.btn-nav:disabled{cursor:not-allowed;opacity:.5;background:#334155}.pdf-container{background:#1e293b;border-radius:12px;min-height:500px;position:relative;overflow:hidden}