:root {
    --bg-color: #f4f7f6;
    --container-bg: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --border-color: #e5e7eb;
    --input-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0f172a;
        --container-bg: #1e293b;
        --text-color: #f8fafc;
        --text-muted: #94a3b8;
        --primary-color: #3b82f6;
        --primary-hover: #60a5fa;
        --border-color: #334155;
        --input-bg: #0f172a;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.app-container {
    background-color: var(--container-bg);
    width: 100%;
    max-width: 800px;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

header {
    text-align: center;
    margin-bottom: 25px;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.input-section {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

input[type="url"] {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="url"]:focus {
    border-color: var(--primary-color);
}

.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn.primary {
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn.primary:hover {
    background-color: var(--primary-hover);
}

.btn.secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.btn.secondary:hover {
    background-color: var(--border-color);
}

.hidden {
    display: none !important;
}

/* Ladeanimation */
.loader {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.output-section {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

textarea {
    width: 100%;
    height: 300px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.5;
    resize: vertical;
    outline: none;
}

.action-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* Responsivität */
@media (max-width: 600px) {
    .input-section {
        flex-direction: column;
    }
    .action-buttons {
        flex-direction: column;
    }
    .btn {
        width: 100%;
    }
}