body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--dark-color);background-color:#f5f7ff;overflow-x:hidden;}
.main-content{min-height:calc(100vh - 70px);background:linear-gradient(135deg,#f8f9ff 0%,#f0f2ff 100%);padding:40px 0;}
.subjects-section{padding:20px 0;}
.section-title{text-align:center;font-size:2.5rem;font-weight:700;color:var(--secondary-color);margin-bottom:20px;position:relative;}
.section-title::after{content:'';display:block;width:80px;height:4px;background:var(--accent-color);margin:15px auto 0;border-radius:2px;}
.subjects-grid{display:flex;flex-direction:column;gap:20px;max-width:1000px;margin:0 auto;padding:20px 0;}
.subject-archive-container{background:white;border-radius:var(--border-radius);box-shadow:var(--box-shadow);padding:25px 30px;cursor:pointer;border:1px solid rgba(67,97,238,0.1);position:relative;overflow:hidden;transition:var(--transition);}
.subject-archive-container::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(67,97,238,0.1),transparent);transition:left 0.5s;}
.subject-archive-container:hover::before{left:100%;}
.subject-archive-container:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,0.15);border-color:var(--primary-color);}
.subject-header{display:flex;justify-content:space-between;align-items:center;cursor:pointer;position:relative;z-index:1;}
.subject-title{font-size:1.3rem;font-weight:600;color:var(--secondary-color);margin:0;flex:1;display:flex;justify-content:center;}
.exam-options{display:none;margin-top:20px;text-align:center;}
.exam-options.active{display:block;}
.exam-option-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin-top:15px;}
.exam-option{padding:15px;background:var(--light-color);border-radius:var(--border-radius);transition:var(--transition);text-align:center;border:1px solid rgba(67,97,238,0.1);}
.exam-option:hover{background:rgba(67,97,238,0.05);transform:translateY(-2px);}
.exam-option-title{font-weight:600;margin-bottom:10px;color:var(--primary-color);}
.exam-option-btn{display:inline-block;padding:8px 15px;background:var(--primary-color);color:white;border-radius:var(--border-radius);font-size:0.9rem;transition:var(--transition);}
.exam-option-btn:hover{background:var(--secondary-color);transform:translateY(-2px);color:white;}
@media(max-width:768px){.section-title{font-size:2rem;}.subject-archive-container{padding:20px;}.subject-title{font-size:1.2rem;text-align:center;}.exam-option-grid{grid-template-columns:1fr;}}
@media(max-width:480px){.section-title{font-size:1.8rem;}.subject-archive-container{padding:15px;}.btn{padding:8px 16px;font-size:0.9rem;}}