* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f3f6fb;
    color: #1f2937;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
}

.login-card h1 {
    margin: 0 0 8px;
    color: #1d4ed8;
    text-align: center;
}

.subtitle {
    text-align: center;
    margin-bottom: 28px;
    color: #6b7280;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 12px;
    margin-bottom: 18px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    font-size: 15px;
}

input:focus {
    outline: none;
    border-color: #2563eb;
}

button {
    width: 100%;
    padding: 12px;
    background: #2563eb;
    color: #ffffff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

.alert {
    background: #fee2e2;
    color: #991b1b;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 16px;
}

.topbar {
    background: #1d4ed8;
    color: #ffffff;
    padding: 18px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar h1 {
    margin: 0;
    font-size: 22px;
}

.topbar a {
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
}

.dashboard {
    max-width: 1000px;
    margin: 32px auto;
    padding: 0 24px;
}

.card {
    background: #ffffff;
    padding: 24px;
    border-radius: 14px;
    box-shadow: 0 6px 22px rgba(0, 0, 0, 0.06);
    margin-bottom: 24px;
}