* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: #e5e7eb;
}

.app {
    display: flex;
    min-height: 100vh;
}

.content {
    flex: 1;
    padding: 32px;
}

h1 {
    margin-top: 0;
    text-align: center;
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626, #ef4444);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(239,68,68,.35);
}

.btn-secondary {
    background: #374151;
}

.panel {
    background: #111827;
    padding: 24px;
    border-radius: 16px;
    border: 5px solid #1f2937;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.success {
    background: #14532d;
    color: #bbf7d0;
    padding: 14px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.error {
    background: #7f1d1d;
    color: #fecaca;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 16px;
}