/* Base layout */
/* Body */
body {
    font-family: "Segoe UI", sans-serif;
    background: linear-gradient(135deg, #2b3e50, #1a2632);
    display: flex;
    flex-direction: column;
    align-items: center; /* center everything horizontally */
    justify-content: flex-start;
    padding: 50px 20px 20px 20px; /* top padding large, bottom smaller */
    margin: 0;
    min-height: 100vh;
    color: #fff;
}

/* Header */
header {
    width: 100%; /* make header span full width */
    max-width: 1000px; /* optional, to prevent it from stretching too wide */
    background: #1a1a1a;
    color: #fff;
    padding: 1.5rem 20px; /* horizontal padding matches body */
    text-align: center;
    box-sizing: border-box; /* ensure padding doesn’t overflow */
    border-radius: 12px; /* optional: rounded corners */
    margin-bottom: 40px; /* spacing below header */
}

header h1 {
    font-size: 3rem;
    margin-bottom: 40px;
    min-height: 1.5em;
    color: #ffffffee;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

header p {
    font-size: 1.2rem;
    color: #bbb;
}

nav {
    margin-top: 1rem;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-size: 1.2rem;
    text-align: center;
    margin: 0 1rem;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #ff9800;
}

/* Input group */
.input-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

/* Input field */
input[type="text"] {
    padding: 12px 16px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    width: 260px;
    max-width: 100%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: box-shadow 0.2s ease;
}

input[type="text"]:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.5);
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn {
    display: inline-block; /* treat links like blocks */
    text-align: center; /* center the text inside link */
    margin: 0.5rem auto; /* center horizontally */
    padding: 0.5rem 1rem; /* make it look like a button */
    background: #1a1a1a;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.dropbtn:hover {
    background: #ff9800;
    scale: 1.04;
}

.dropbtn .arrow {
    display: inline-block;
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.dropdown.active .arrow {
    transform: rotate(180deg);
}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    z-index: 1;
    background: white;
    border-radius: 12px;
    box-shadow: 0px 4px 20px rgba(0, 0, 0, 0.15);
    overflow: hidden;

    /* hidden by default */
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: auto;
    transition:
        opacity 0.25s ease,
        transform 0.25s ease;
    pointer-events: none;
}

.dropdown-content a {
    display: block;
    padding: 12px 16px;
    text-decoration: none;
    background-color: #fff;
    color: #333;
    transition: background 0.2s;
}

.dropdown-content a:hover {
    background: #ff9800;
    scale: 1.04;
}

/* Show the menu when active */
.dropdown.active .dropdown-content {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* Button */
button {
    background: #000000;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    transition:
        background 0.3s,
        transform 0.1s;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

button:hover {
    background: #ff9900;
    scale: 1.04;
}

/* Result display */
#result {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px 30px;
    margin-top: 30px;
    font-size: 1.2rem;
    text-align: center;
    backdrop-filter: blur(6px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    color: #ffffffdd;
}

/* Links */
a {
    color: #ffd54f;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #fff176;
    text-decoration: underline;
}

section {
    display: none;
}

section.active {
    display: block;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 20px;
}

th,
td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}