:root {
    --primary: rgb(30, 75, 105);
    --accent: rgb(70, 180, 200);
    --light-bg: #f5f7fa;
    --border: #dde2e8;
    --text: #2c3e50;
    --text-light: #6c7a89;
    --get: #3498db;
    --post: #27ae60;
    --put: #f39c12;
    --delete: #e74c3c;
    --success: #27ae60;
    --client-error: #e67e22;
    --server-error: #e74c3c;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--light-bg);
    color: var(--text);
    line-height: 1.5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px 20px;
}

h2 {
    color: var(--primary);
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* Controls */
.controls {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.method-buttons {
    display: flex;
    gap: 6px;
}

.method-btn {
    padding: 8px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: white;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: "SF Mono", "Fira Code", monospace;
}

.method-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.method-btn.get { color: var(--get); border-color: var(--get); }
.method-btn.post { color: var(--post); border-color: var(--post); }
.method-btn.put { color: var(--put); border-color: var(--put); }
.method-btn.delete { color: var(--delete); border-color: var(--delete); }

.method-btn.get.active { background: var(--get); color: white; }
.method-btn.post.active { background: var(--post); color: white; }
.method-btn.put.active { background: var(--put); color: white; }
.method-btn.delete.active { background: var(--delete); color: white; }

.endpoint-select {
    display: flex;
    align-items: center;
    gap: 8px;
}

.endpoint-select label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-light);
}

.endpoint-select select {
    padding: 8px 12px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: 0.85rem;
    background: white;
    cursor: pointer;
}

.send-btn {
    padding: 8px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: auto;
}

.send-btn:hover:not(:disabled) {
    background: rgb(40, 95, 130);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Panels */
.panel {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 12px;
    box-shadow: var(--shadow);
}

.panel h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
    margin-bottom: 10px;
}

.request-line {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.method-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.8rem;
    font-family: "SF Mono", "Fira Code", monospace;
    color: white;
}

.method-badge.get { background: var(--get); }
.method-badge.post { background: var(--post); }
.method-badge.put { background: var(--put); }
.method-badge.delete { background: var(--delete); }

.url {
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: 0.9rem;
    color: var(--text);
}

.detail-row {
    margin-bottom: 8px;
}

.label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.code-block {
    background: #f0f3f6;
    border: 1px solid #e1e6eb;
    border-radius: 6px;
    padding: 10px 14px;
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre;
    color: var(--text);
}

.body-section {
    margin-top: 8px;
}

/* Canvas */
#canvas-container {
    margin: 12px 0;
    border-radius: var(--radius);
    overflow: hidden;
}

#canvas-container canvas {
    display: block;
}

/* Response Panel */
.response-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.85rem;
    font-family: "SF Mono", "Fira Code", monospace;
    color: white;
}

.status-badge.success { background: var(--success); }
.status-badge.client-error { background: var(--client-error); }
.status-badge.server-error { background: var(--server-error); }

.response-time {
    font-size: 0.82rem;
    color: var(--text-light);
    font-family: "SF Mono", "Fira Code", monospace;
}

.status-explanation {
    margin-top: 10px;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    line-height: 1.5;
}

.status-explanation.success {
    background: #e8f8ef;
    color: #1a7a3a;
    border-left: 3px solid var(--success);
}

.status-explanation.client-error {
    background: #fdf0e2;
    color: #8a5a1e;
    border-left: 3px solid var(--client-error);
}

.status-explanation.server-error {
    background: #fde8e8;
    color: #8a1e1e;
    border-left: 3px solid var(--server-error);
}

/* Status Reference */
.status-reference {
    margin-top: 20px;
    padding: 16px 20px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.status-reference h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
    margin-bottom: 12px;
}

.status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.status-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 6px;
    font-size: 0.82rem;
    line-height: 1.4;
    background: var(--light-bg);
}

.status-item .code {
    font-family: "SF Mono", "Fira Code", monospace;
    font-weight: 700;
    font-size: 0.82rem;
    padding: 2px 6px;
    border-radius: 4px;
    color: white;
    flex-shrink: 0;
}

.status-item.success .code { background: var(--success); }
.status-item.client-error .code { background: var(--client-error); }
.status-item.server-error .code { background: var(--server-error); }

.status-item .desc {
    color: var(--text);
}

/* Responsive */
@media (max-width: 600px) {
    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .method-buttons {
        justify-content: center;
    }

    .endpoint-select {
        justify-content: center;
    }

    .send-btn {
        margin-left: 0;
    }

    .status-grid {
        grid-template-columns: 1fr;
    }

    .request-line {
        flex-wrap: wrap;
    }

    .url {
        font-size: 0.8rem;
        word-break: break-all;
    }
}