* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: #f1f5f9;
    color: #0f172a;
    line-height: 1.5;
}
.card {
    background: white;
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 24px;
}
button, .btn {
    background: #1e40af;
    color: white;
    border: none;
    border-radius: 40px;
    padding: 10px 24px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.1s;
    font-size: 0.9rem;
}
button:disabled {
    background: #94a3b8;
    cursor: not-allowed;
}
button.secondary {
    background: white;
    color: #1e40af;
    border: 1px solid #1e40af;
}
input, select, textarea {
    border: 1px solid #cbd5e1;
    border-radius: 16px;
    padding: 12px 16px;
    width: 100%;
    margin: 8px 0;
    font-size: 0.9rem;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #1e40af;
    box-shadow: 0 0 0 2px rgba(30,64,175,0.2);
}
table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 16px;
    overflow: hidden;
}
th, td {
    border: 1px solid #e2e8f0;
    padding: 12px;
    text-align: left;
}
.error {
    color: #dc2626;
    font-size: 0.9rem;
}
.flex-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}
.login-body {
    background: #f0f2f5;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.admin-nav {
    background: white;
    padding: 12px 24px;
    display: flex;
    gap: 24px;
    border-bottom: 1px solid #e2e8f0;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.admin-nav a {
    text-decoration: none;
    color: #1e293b;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 30px;
}
.admin-nav a:hover {
    background: #eef2ff;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}