* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    padding: 30px 20px;
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    gap: 20px;
}

.app-header h1 {
    font-size: 2rem;
    color: #ffffff;
}

.back-link {
    text-decoration: none;
    color: #38bdf8;
    font-weight: bold;
}

.panel {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
}