body {
    font-family: Arial, sans-serif;
    margin: 0;
    text-align: center;
    transition: background-color 0.3s, color 0.3s;
}

/* LIGHT MODE */
body.light {
    background-color: #f0fdfa;
    color: #0f172a;
}

/* DARK MODE */
body.dark {
    background-color: #0f172a;
    color: #e2e8f0;
}

/* HEADER */
header {
    padding: 20px;
    transition: background-color 0.3s;
    position: relative;
}

body.light header {
    background-color: #14b8a6;
}

body.dark header {
    background-color: #0f766e;
}

nav a {
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
    color: white;
}

nav a:hover {
    opacity: 0.8;
}

/* HERO SECTION */
.hero {
    padding: 60px 20px;
}

/* BUTTONS */
.button, button {
    display: inline-block;
    padding: 10px 20px;
    background-color: #14b8a6;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.button:hover, button:hover {
    background-color: #0f766e;
    transform: translateY(-2px);
}

/* GALLERY */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 40px;
}

.card {
    padding: 15px;
    border-radius: 12px;
    transition: background-color 0.3s, box-shadow 0.3s;
}

body.light .card {
    background: white;
    box-shadow: 0 4px 12px rgba(20, 184, 166, 0.15);
}

body.dark .card {
    background: #1e293b;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.card img {
    width: 100%;
    border-radius: 12px;
}

/* FORM */
.form-section {
    padding: 40px;
}

form {
    max-width: 400px;
    margin: auto;
    display: flex;
    flex-direction: column;
}

input {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 8px;
    border: 1px solid #94a3b8;
}

body.dark input {
    background-color: #334155;
    color: white;
    border: 1px solid #475569;
}

/* FOOTER */
footer {
    padding: 20px;
    transition: background-color 0.3s;
}

body.light footer {
    background-color: #ccfbf1;
}

body.dark footer {
    background-color: #0f766e;
}

/* DARK MODE TOGGLE BUTTON */
.toggle-btn {
    position: absolute;
    right: 20px;
    top: 20px;
    padding: 6px 12px;
    border-radius: 20px;
    border: none;
    cursor: pointer;
    background-color: white;
    color: #0f766e;
    font-weight: bold;
}

body.dark .toggle-btn {
    background-color: #1e293b;
    color: #14b8a6;
}