* {
    font-family: 'Inter', sans-serif;
}

body {
    min-height: 100vh;
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab, #6b73ff, #b24592);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
}

@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.glass {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.glass-dark {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-card-header {
    background: rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.day-btn {
    transition: all 0.3s ease;
}

.day-btn:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.3);
}

.day-btn.active {
    background: rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    font-weight: 700;
}

.lesson-card {
    transition: all 0.3s ease;
}

.lesson-card:hover {
    transform: scale(1.01);
    background: rgba(255, 255, 255, 0.25);
}

.lesson-card.current {
    background: rgba(255, 255, 255, 0.35);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.5);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px rgba(255, 255, 255, 0.1); }
    50% { box-shadow: 0 0 30px rgba(255, 255, 255, 0.4); }
}

.progress-bar {
    background: linear-gradient(90deg, #23d5ab, #23a6d5, #e73c7e);
    background-size: 200% 100%;
    animation: progress-gradient 3s ease infinite;
}

@keyframes progress-gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.floating-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    z-index: -1;
}

.shape {
    position: absolute;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.shape:nth-child(1) { width: 300px; height: 300px; top: -150px; left: -150px; animation-delay: 0s; }
.shape:nth-child(2) { width: 200px; height: 200px; top: 50%; right: -100px; animation-delay: -5s; }
.shape:nth-child(3) { width: 150px; height: 150px; bottom: -75px; left: 30%; animation-delay: -10s; }
.shape:nth-child(4) { width: 250px; height: 250px; top: 20%; left: 60%; animation-delay: -15s; }

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(50px, 50px) rotate(90deg); }
    50% { transform: translate(0, 100px) rotate(180deg); }
    75% { transform: translate(-50px, 50px) rotate(270deg); }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1); 
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3); 
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5); 
}