body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f5f7;
    margin: 0;
    color: #222;
}

a {
    color: #0078d4;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.site-header, .site-footer {
    background: #222;
    color: #fff;
    padding: 1rem 2rem;
}

.site-header h1, .site-footer p {
    margin: 0;
}

.container {
    max-width: 1100px;
    margin: 1.5rem auto;
    padding: 0 1rem;
}

h1, h2, h3 {
    margin-bottom: 0.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: #fff;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 0.5rem 0.75rem;
    text-align: left;
}

table th {
    background: #f0f0f0;
}

.btn {
    display: inline-block;
    padding: 0.35rem 0.7rem;
    background: #0078d4;
    color: #fff;
    border-radius: 4px;
    font-size: 0.9rem;
}

.btn:hover {
    background: #005fa3;
}

/* Login */
body.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-box {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    width: 320px;
}

.login-box h1 {
    margin-top: 0;
    margin-bottom: 1rem;
}

.login-box label {
    display: block;
    margin-top: 0.5rem;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.login-box input {
    width: 100%;
    padding: 0.4rem 0.6rem;
    margin-bottom: 0.5rem;
}

.login-box button {
    width: 100%;
    padding: 0.5rem 0.6rem;
    border: none;
    background: #0078d4;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
}

.login-box button:hover {
    background: #005fa3;
}

.error {
    background: #ffd2d2;
    color: #900;
    padding: 0.4rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
}

/* Admin header */
.admin-header {
    background: #333;
    color: #fff;
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header nav a {
    color: #fff;
    margin-left: 1rem;
}

.admin-header nav a:hover {
    text-decoration: underline;
}