body{
    font-family: Arial, sans-serif;
    background-color: hsl(0, 0%, 95%);
    margin: 0;
}

h1 {
    color: #22ecba;
    text-align: center;
    margin-top: 50px;
}

h2 {
    color: #333;
}

h3 {
    color: #444;
    margin-top: 15px;
}

form {
    background-color: #f2f2f2;
    text-align: center;
    max-width:400px;
    margin: auto;
    padding:25px;
    border-radius: 10px;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.637);
}

input{
    width:60%;
    text-align: center;
    font-size: 20px;
    border: 2px solid hsla(0, 2%, 29%, 0.589);
    border-radius: 7px;
    margin-bottom: 15px;
}

label {
    font-size: 1.2em;
    font-weight: bold;
}

button {
    margin-top: 10px;
    background-color: #31bd24;
    font-size: 1.2em;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
    color: white;
}

button:hover {
    background-color: rgb(21, 138, 21);
}

#result {
    font-size: 1.5em;
    font-weight: bold;
    text-align: center;
    margin-top: 20px;
}

/* ---- Nav bar (shared across all pages) ---- */
nav {
    background-color: #f2f2f2;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    padding: 15px 20px;
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}

nav a {
    color: #333;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.05em;
    padding-bottom: 3px;
    border-bottom: 3px solid transparent;
}

nav a:hover,
nav a.active {
    color: #22ecba;
    border-bottom: 3px solid #22ecba;
}

/* ---- Home page tile grid ---- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
}

.grid a.tile {
    display: block;
    background-color: #f2f2f2;
    border-radius: 10px;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.3);
    padding: 25px;
    text-align: center;
    text-decoration: none;
    color: #333;
    transition: transform 0.15s;
}

.grid a.tile:hover {
    transform: translateY(-4px);
}

.grid a.tile .emoji {
    font-size: 2rem;
    display: block;
    margin-bottom: 10px;
}

.grid a.tile h2 {
    margin: 0 0 5px;
    color: #22ecba;
}

.grid a.tile p {
    color: #666;
    font-size: 0.9em;
    margin: 0;
}

/* ---- Portfolio page cards ---- */
.card {
    background-color: #f2f2f2;
    max-width: 600px;
    margin: 20px auto;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.3);
}

.card p {
    text-align: left;
}

.project-list .card a {
    color: #1a7f45;
    font-weight: bold;
    text-decoration: none;
}

.project-list .card a:hover {
    text-decoration: underline;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 10px 0;
}

.tag {
    background-color: #e6e6e6;
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 0.85em;
    color: #444;
}

/* ---- Calculator ---- */
#calculator {
    background-color: #f2f2f2;
    max-width: 320px;
    margin: 40px auto;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.637);
    text-align: center;
}

#display {
    width: 100%;
    box-sizing: border-box;
    font-size: 1.8em;
    text-align: right;
    padding: 10px;
    margin-bottom: 15px;
    border: 2px solid hsla(0, 2%, 29%, 0.589);
    border-radius: 7px;
}

#keys {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

#keys button {
    margin: 0;
    font-size: 1.1em;
    padding: 15px 0;
}

#keys .operator_btn {
    background-color: #1a9be0;
}

#keys .operator_btn:hover {
    background-color: #147bb5;
}