:root {
    --primary-color: #1a1a1a;
    --secondary-color: #2c2c2c;
    --accent-color: #D4AF37; /* Gold */
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--primary-color);
    background-image: url('background.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-color);
    line-height: 1.6;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
}

header {
    text-align: center;
    padding: 4rem 1rem 2rem;
}

.logo {
    width: 100px;
    height: 100px;
    margin-bottom: 1rem;
}

header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 300;
}

.course-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
    flex-grow: 1;
}

.module {
    background-color: var(--secondary-color);
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(212, 175, 55, 0.2);
    transition: all 0.3s ease;
}

.module:hover {
    border-color: rgba(212, 175, 55, 0.5);
}

.module-header {
    background-color: transparent;
    border: none;
    width: 100%;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    text-align: left;
    color: var(--text-color);
}

.module-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.module-header i {
    color: var(--accent-color);
    transition: transform 0.3s ease;
    font-size: 1.2rem;
}

.module.active .module-header i {
    transform: rotate(180deg);
}

.module-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding 0.4s ease-out;
}

.module-content p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-muted);
    font-weight: 400;
    font-size: 1rem;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}