body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(120deg, #e0eafc 0%, #cfdef3 100%);
    margin: 0;
    padding: 0;
}
.container {
    max-width: 900px;
    margin: 40px auto;
    background: #fff;
    padding: 40px 32px 32px 32px;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(44, 62, 80, 0.15);
}
h1 {
    color: #2d3e50;
    font-size: 2.6em;
    margin-bottom: 16px;
    letter-spacing: 2px;
    text-align: center;
}
h2 {
    color: #0984e3;
    font-size: 2em;
    margin-top: 24px;
    margin-bottom: 12px;
    border-bottom: 2px solid #dfe6e9;
    padding-bottom: 6px;
}
h3 {
    color: #636e72;
    margin-top: 18px;
    margin-bottom: 8px;
}
ul {
    list-style-type: disc;
    padding-left: 24px;
    margin-bottom: 24px;
}
.tab {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 32px;
    border-radius: 12px 12px 0 0;
    overflow: hidden;
    background: #dfe6e9;
    box-shadow: 0 2px 8px rgba(44, 62, 80, 0.08);
}
.tab button {
    background-color: inherit;
    float: none;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 16px 28px;
    transition: 0.3s;
    font-size: 1.1em;
    color: #636e72;
    font-weight: 500;
    border-right: 1px solid #b2bec3;
}
.tab button:last-child {
    border-right: none;
}
.tab button:hover {
    background-color: #b2bec3;
    color: #2d3436;
}
.tab button.active {
    color: #0984e3;
}
.tabcontent {
    animation: fadeEffect 0.5s;
    background: #f4f6fb;
    border-radius: 0 0 12px 12px;
    box-shadow: 0 2px 8px rgba(44, 62, 80, 0.05);
    margin-bottom: 24px;
}
@keyframes fadeEffect {
    from {opacity: 0;}
    to {opacity: 1;}
}
form input, form textarea { 
    width: 100%;
    padding: 10px;
    margin-bottom: 14px;
    border-radius: 6px;
    border: 1px solid #b2bec3;
    font-size: 1em;
    background: #f8f8f8;
}
form button {
    padding: 10px 24px;
    background: #0984e3;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.2s;
}
form button:hover {
    background: #74b9ff;
}
a {
    color: #0984e3;
    text-decoration: none;
    transition: color 0.2s;
}
a:hover {
    color: #2d3436;
    text-decoration: underline;
}
::-webkit-scrollbar {
    width: 8px;
    background: #dfe6e9;
}
::-webkit-scrollbar-thumb {
    background: #b2bec3;
    border-radius: 8px;
}
img {
    display: block;
    margin: 24px auto;
    border-radius: 0%;
    box-shadow: 0 2px 8px rgba(44, 62, 80, 0.12);
    max-width: 180px;
}
label {
    font-weight: 500;
    color: #636e72;
}

form input[type="text"],
form input[type="email"], 
form textarea{
    width: 1000px;
    max-width: 90%;
    display: inline-block;
}
.alert {
    padding: 15px;
    border-radius: 4px;
    margin-top: 10px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}