body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: #284166;
    color: #e0e0e0;
    line-height: 1.6;
    margin: 0;
    padding: 2rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #113b63;
    padding: 2rem;
    border: 1px solid #1a3342;
    border-radius: 8px;
}

header {
    margin-bottom: 2rem;
    border-bottom: 1px solid #287a64;
    padding-bottom: 1rem;
}

h1 {
    margin: 0 0 0.5rem 0;
    color: #ffffff;
}

.subtitle {
    margin: 0;
    color: #d1e2f2;
    font-size: 1.1rem;
}

.info-card {
    margin-bottom: 2rem;
}

h2 {
    color: #ffffff;
}

ul {
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #28607a;
    font-size: 0.9rem;
    color: #b0e0d0;
    text-align: center;
}

/* Download Form Styles */
.download-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: #174876;
    border-radius: 8px;
    border: 1px solid #1a3342;
}

#downloadForm {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

#ytUrl {
    flex: 1;
    padding: 0.8rem 1rem;
    font-size: 1rem;
    color: #ffffff;
    background: #0d2b4a;
    border: 1px solid #28607a;
    border-radius: 6px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#ytUrl:focus {
    border-color: #287a64;
    box-shadow: 0 0 0 2px rgba(40, 122, 100, 0.2);
}

#ytUrl::placeholder {
    color: #6a8caf;
}

#submitBtn {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    background: #287a64;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

#submitBtn:hover:not(:disabled) {
    background: #31947a;
}

#submitBtn:active:not(:disabled) {
    transform: scale(0.98);
}

#submitBtn:disabled {
    background: #28607a;
    color: #8daabf;
    cursor: not-allowed;
}

#statusMsg {
    margin: 0;
    font-size: 0.95rem;
    color: #b0e0d0;
}