* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f6f8;
    color: #1f2937;
}

.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #111827, #374151);
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.login-card h1 {
    margin: 0 0 8px;
    font-size: 28px;
}

.login-card p {
    margin: 0 0 24px;
    color: #6b7280;
}

label {
    display: block;
    margin-top: 16px;
    margin-bottom: 6px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    font-size: 16px;
}

button {
    width: 100%;
    margin-top: 24px;
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: #2563eb;
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

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

.topbar {
    background: #111827;
    color: white;
    padding: 18px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.topbar h1 {
    margin: 0;
    font-size: 24px;
}

.topbar span {
    color: #d1d5db;
    font-size: 14px;
}

.logout {
    color: white;
    background: #dc2626;
    padding: 10px 14px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
}

.logout:hover {
    background: #b91c1c;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 20px;
}

.intro {
    margin-bottom: 24px;
}

.intro h2 {
    margin-bottom: 8px;
}

.report-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 28px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.report-card h3 {
    margin-top: 0;
}

.iframe-wrapper {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    overflow: hidden;
    border-radius: 12px;
    background: #e5e7eb;
}

.iframe-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

@media (max-width: 768px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .login-card {
        padding: 24px;
    }
}