/* Glass Theme CSS */
body.theme-glass {
    background: linear-gradient(180deg, #4a004a, #000000, #87ceeb, #ffd700); /* Dark violet to black to skyblue to sunny yellow */
    background-size: 400% 400%;
    animation: gradientAnimation 15s ease infinite;
    color: #ffffff;
}

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

/* Generic opacity classes */
.op-1 { background-color: rgba(255, 255, 255, 0.1); }
.op-2 { background-color: rgba(255, 255, 255, 0.2); }
.op-3 { background-color: rgba(255, 255, 255, 0.3); }
.op-4 { background-color: rgba(255, 255, 255, 0.4); }
.op-5 { background-color: rgba(255, 255, 255, 0.5); }
.op-6 { background-color: rgba(255, 255, 255, 0.6); }
.op-7 { background-color: rgba(255, 255, 255, 0.7); }
.op-8 { background-color: rgba(255, 255, 255, 0.8); }
.op-9 { background-color: rgba(255, 255, 255, 0.9); }

/* Glass buttons */
.btn-hero.btn-primary {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(238, 238, 238, 0.2));
    color: #ffffff;
    border: 2px solid;
    border-image: linear-gradient(to bottom right, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.1) 100%) 1;
    border-radius: 0.5rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.btn-hero.btn-primary:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(238, 238, 238, 0.3));
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.btn-hero.btn-outline {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(238, 238, 238, 0.05));
    color: #ffffff;
    border: 2px solid;
    border-image: linear-gradient(to bottom right, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.05) 100%) 1;
    border-radius: 0.5rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.btn-hero.btn-outline:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(238, 238, 238, 0.1));
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

/* Header with opacity */
.navbar {
    background-color: rgba(255, 255, 255, 0.2); /* op-2 */
    backdrop-filter: blur(5px);
}

/* Hero section for glass theme */
.hero-glass {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1); /* op-1 */
    border-radius: 1rem;
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px 0 rgba( 31, 38, 135, 0.37 );
    border: 1px solid rgba( 255, 255, 255, 0.18 );
    margin: 2rem;
}

.hero-glass .hero-title {
    color: #ffffff;
}

.hero-glass .hero-subtitle {
    color: #e0e0e0;
}