* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    margin: 0;
    background: linear-gradient(135deg, #112D4E,#3F72AF);
    min-height: 100vh;
    color: #112D4E;
    padding: 0;
}

.container {
    max-width: 900px;
    margin: auto;
    background: #F9F7F7;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
    margin-top: 30px;
}

h1 {
    text-align: center;
    margin-bottom: 10px;
}

.info {
    background: #DBE2EF;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.buttons {
    text-align: center;
    margin-bottom: 20px;
}

button {
    border: none;
    padding: 10px 16px;
    margin: 5px;
    border-radius: 8px;
    background: #06b6d4;
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

button:hover {
    background: #0891b2;
}

.delete {
    background: #ef4444;
}

.reset {
    background: #f59e0b;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    background: #DBE2EF;
    margin-bottom: 6px;
    padding: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.today {
    background: #1dadc0;
    border: 2px solid #22d3ee;
    color: #F9F7F7;
}

table {
    border: 1px solid #DBE2EF;
    border-spacing: 0;
    border-collapse: collapse;
    width: 100%;
}

td, th {
    border: 1px solid #ddd;
    padding: 8px;
}

td:hover {background-color: #ddd;}

th {
    padding-top: 12px;
    padding-bottom: 12px;
    text-align: left;
    background-color: #DBE2EF;
}

input {
    border: 1px solid #DBE2EF;
    border-radius: 8px;
}

.jumbotron {
    font-size: 20px;
    padding: 60px;
    background: linear-gradient(135deg, #22d3ee, #1dadc0, #3F72AF);
    text-align: center;
    text-shadow: 2px 2px 4px gray;
    align-content: center;
    color: #F9F7F7;
    height: 100vh;
}

header {
    display: inline;
}

nav ul {
    padding-inline: 4rem;
    display: flex;
    gap: 2rem;
}

nav li {
    list-style-type: none;
    margin-right: 20px;
    background-color: #3F72AF;
}

nav a {
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    color: #F9F7F7;
}

nav {
    background-color: #3F72AF;
    padding: 5px;
    position: sticky;
    top: 0;
}

.kartu {
    box-shadow: 0 2px 8px 2px rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 20px;
    background-color: #3F72AF;
    color: #DBE2EF;
    margin: 20px;
}

footer {
    padding: 20px;
    color: #F9F7F7;
    background-color: #3F72AF;
    text-align: center;
    font-weight: bold;
    margin-top: 30px;
}