:root { 
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%); 
    --hero-bg: #1e1b4b;
    --glass-bg: rgba(255, 255, 255, 0.95); 
}
body { background-color: #f8fafc; font-family: 'Segoe UI', Roboto, sans-serif; min-height: 100vh; display: flex; flex-direction: column; }
.navbar { background: var(--primary-gradient) !important; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }

.hero-section {
    background-color: var(--hero-bg);
    background-image: radial-gradient(circle at 20% 35%, rgba(79, 70, 229, 0.4) 0%, transparent 40%), 
                      radial-gradient(circle at 80% 65%, rgba(124, 58, 237, 0.3) 0%, transparent 40%);
    border-radius: 24px;
    padding: 60px 20px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}
.hero-section::before {
    content: "";
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 50%;
}
.hero-content { position: relative; z-index: 2; }
.hero-title { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 10px; color: #fff; }
.hero-subtitle { color: #cbd5e1; font-size: 1.1rem; margin-bottom: 30px; }

.search-box-wrapper {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    padding: 10px;
    border-radius: 100px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    transition: all 0.3s ease;
}
.search-box-wrapper:focus-within {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    transform: scale(1.02);
}
.search-input {
    background: transparent !important;
    border: none !important;
    color: #fff !important;
    padding-left: 25px !important;
    font-size: 1.1rem !important;
    box-shadow: none !important;
}
.search-input::placeholder { color: rgba(255, 255, 255, 0.5); }
.btn-submit-code {
    background: #fff !important;
    color: var(--hero-bg) !important;
    border: none !important;
    width: 50px;
    height: 50px;
    border-radius: 50% !important;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: 0.3s;
}
.btn-submit-code:hover { background: var(--primary-gradient) !important; color: #fff !important; }

.glass-card { background: var(--glass-bg); border: 1px solid rgba(226, 232, 240, 0.8); border-radius: 20px; box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); }
.custom-scrollbar::-webkit-scrollbar { width: 6px; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: #cbd5e0; border-radius: 10px; }
.grade-badge { width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; border-radius: 10px; font-weight: 800; }
.hover-scale:hover { transform: scale(1.05); transition: 0.2s; }