body {
    background: linear-gradient(to bottom, #c7e8f3, #e0f7fa);
    font-family: Arial, sans-serif;
    margin: 0;
}

/* Layout container (fixes empty space issue) */
.container {
    max-width: 1100px;
    margin: auto;
    padding: 20px;
}

/* Header */
header {
    background-color: #004d40;
    color: white;
    padding: 20px;
    text-align: center;
}

nav {
    margin-top: 10px;
}

nav a {
    color: white;
    margin: 0 12px;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    color: #80cbc4;
}

/* HERO SECTION */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    margin-top: 20px;
}

.hero-text {
    flex: 1;
}

.hero-text h2 {
    font-size: 2.2em;
    color: #00695c;
}

.hero-text p {
    font-size: 1.1em;
}

/* BUTTON */
.cta-btn {
    margin-top: 15px;
    padding: 10px 18px;
    font-size: 16px;
    background-color: #00796b;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.cta-btn:hover {
    background-color: #004d40;
}

/* IMAGE LAYOUT */
.hero-images {
    display: flex;
    gap: 15px;
}

.hero-images img {
    width: 250px;
    border-radius: 8px;
    box-shadow: 0px 4px 10px rgba(0,0,0,0.2);
}

/* TABLE SECTION */
.table-section {
    text-align: center;
    margin-top: 40px;
}

table {
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
    border-collapse: collapse;
}

th, td {
    border: 1px solid #333;
    padding: 10px;
}

th {
    background-color: #00796b;
    color: white;
}

tr:nth-child(even) {
    background-color: #f2f2f2;
}

/* Footer */
footer {
    text-align: center;
    padding: 15px;
    margin-top: 30px;
}

.app-tool {
    max-width: 500px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 4px 10px rgba(0,0,0,0.2);
    text-align: left;
}

.app-tool label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

.app-tool select {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
}

.app-tool button {
    margin-top: 20px;
    padding: 10px;
    width: 100%;
    background-color: #00796b;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.app-tool button:hover {
    background-color: #004d40;
}

.result-box {
    margin-top: 20px;
    padding: 15px;
    background-color: #e0f7fa;
    border-radius: 8px;
    font-weight: bold;
}