*{margin:0;padding:0;box-sizing:border-box}.history-page{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);padding:40px 20px}.page-hero{max-width:1200px;margin:0 auto 40px;background:#fff;border-radius:24px;padding:40px;box-shadow:0 20px 60px #0000004d;display:flex;justify-content:space-between;align-items:center;gap:30px}.hero-content{display:flex;align-items:center;gap:25px}.hero-icon{font-size:5rem;animation:bounce 2s ease-in-out infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.hero-content h1{background:linear-gradient(135deg,#667eea,#764ba2);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero-content p{color:#64748b;font-size:1.1rem}.btn-clear-history{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;border:none;padding:15px 30px;border-radius:14px;font-weight:700;cursor:pointer;display:flex;align-items:center;gap:10px;transition:all .3s;box-shadow:0 8px 25px #ef444466}.btn-clear-history:hover{transform:translateY(-3px);box-shadow:0 12px 35px #ef444480}.stats-dashboard{max-width:1200px;margin:0 auto 40px;display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:25px}.stat-card{background:#fff;padding:35px;border-radius:20px;display:flex;gap:25px;box-shadow:0 10px 30px #0003;transition:.3s;position:relative}.stat-card:hover{transform:translateY(-5px);box-shadow:0 15px 40px #0000004d}.stat-card:before{content:"";position:absolute;top:0;left:0;height:5px;width:100%}.stat-primary:before{background:linear-gradient(90deg,#3b82f6,#2563eb)}.stat-success:before{background:linear-gradient(90deg,#10b981,#059669)}.stat-info:before{background:linear-gradient(90deg,#8b5cf6,#7c3aed)}.stat-icon{font-size:4rem}.stat-value{font-size:3rem;font-weight:800;color:#1e293b}.stat-label{color:#64748b;font-weight:600}.content-section{max-width:1200px;margin:0 auto 30px;background:#fff;border-radius:24px;padding:35px;box-shadow:0 10px 30px #0003}.section-header h2{font-size:1.8rem;font-weight:700;color:#1e293b;margin-bottom:30px}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}.subject-card{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:25px;border-radius:16px;display:flex;justify-content:space-between;transition:.3s}.subject-card:hover{transform:scale(1.05)}.history-timeline{display:flex;flex-direction:column;gap:20px}.history-item{background:linear-gradient(135deg,#f8fafc,#f1f5f9);padding:30px;border-radius:16px;display:flex;gap:25px;border-left:5px solid #667eea;transition:.3s}.history-item:hover{transform:translate(10px)}.btn-action{padding:12px 24px;border-radius:12px;font-weight:600;cursor:pointer}.btn-redownload{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff}.btn-view{background:#fff;border:2px solid #cbd5e1}@media(max-width:768px){.page-hero,.hero-content{flex-direction:column;text-align:center}.stats-dashboard,.subjects-grid{grid-template-columns:1fr}.history-item{flex-direction:column}}