body {
    margin: 0;
    padding: 0;
    font-family: 'Sarabun', sans-serif;
    /* More premium gradient, softer but vibrant */
    background: linear-gradient(120deg, #47f6ad 0%, #8fd3f4 100%);
    height: 100vh;
    display: flex;
    flex-direction: column;
    color: white;
}

header {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem 2rem; /* Reduced padding slightly to accommodate larger logo */
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Added specific styling for the logo image */
.logo-area img {
    height: 90px; /* Scaled up from default */
    width: auto;
    transition: transform 0.3s ease;
}

.logo-area img:hover {
    transform: scale(1.05); /* Subtle interactive effect */
}

.logo-text h1 {
    color: #0f766e;
    font-size: 1.8rem; /* Slightly larger */
    margin: 0;
    font-weight: 800;
    letter-spacing: -0.025em;
}

.logo-text p {
    color: #115e59;
    font-size: 1.1rem;
    margin: 0;
    font-weight: 500;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    /* backdrop-filter removed here to keep it clean */
}

.welcome-text h2 {
    font-size: 3.5rem; /* Larger font */
    line-height: 1.2;
    margin-bottom: 0.5rem;
    color: #0f766e; /* Changed from white to Dark Teal for high contrast */
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.5); /* White glow to pop against any background */
    font-weight: 800; /* Bolder */
    letter-spacing: -1px;
}

.buttons-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 3rem;
    width: 100%;
    max-width: 480px;
    /* Wider buttons */
}

.main-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 2rem;
    border-radius: 20px;
    /* Rounder corners */
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: 700;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.main-btn:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* E-learning button style - Cool Mint */
.btn-elearning {
    background: white;
    color: #0d9488;
}

.btn-elearning:hover {
    border-color: #fff;
    background: #f0fdfa;
}

/* Diagnosis button style - Deep Teal */
.btn-diagnosis {
    background: linear-gradient(to right, #0f766e, #115e59);
    color: white;
}

.btn-diagnosis:hover {
    filter: brightness(1.1);
}


.main-btn i {
    font-size: 2.5rem;
}

footer {
    display: flex;
    justify-content: center;
    padding: 2rem;
    background-color: rgba(255, 255, 255, 0.9);
    gap: 3rem;
}

footer i {
    opacity: 0.8;
    transition: opacity 0.2s;
}

footer i:hover {
    opacity: 1;
    transform: scale(1.1);
}