body {
    font-family: 'Inter', Arial, Helvetica, sans-serif;
    margin: 0;
    background: linear-gradient(135deg, #14141c, #0e0e14);
    color: #e4e6f1;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 220px;
    background: #1b1b26;
    padding: 25px;
    box-shadow: 4px 0 30px rgba(0, 0, 0, 0.4);
}

.sidebar a {
    display: block;
    color: #a9a9ff;
    margin: 14px 0;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.sidebar a:hover {
    color: #ffffff;
    transform: translateX(4px);
}

/* Content */
.content {
    margin-left: 240px;
    padding: 40px;
}

.center {
    max-width: 750px;
    margin: 100px auto;
    text-align: center;
}

/* Buttons */
.button,
button {
    display: inline-block;
    background: linear-gradient(135deg, #6c63ff, #4e46e5);
    color: #fff;
    padding: 12px 22px;
    border-radius: 10px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: 0 8px 20px rgba(76, 70, 229, 0.4);
}

.button:hover,
button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(76, 70, 229, 0.6);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    background: #1a1a24;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.5);
}

th {
    background: #222231;
    font-weight: 600;
}

th, td {
    padding: 14px;
    border-bottom: 1px solid #2b2b3d;
    text-align: left;
}

tr:hover {
    background: #232334;
}

/* Inputs */
input,
select,
textarea {
    display: block;
    width: 100%;
    padding: 10px 12px;
    margin: 8px 0 16px 0;
    border-radius: 10px;
    border: 1px solid #2e2e40;
    background: #161620;
    color: #e4e6f1;
    font-size: 14px;
    transition: all 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: #6c63ff;
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.25);
}

/* Labels */
label {
    font-weight: 600;
    margin-top: 8px;
    display: block;
    color: #c2c5ff;
}