:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --line: #e6ebf2;
    --text: #1f2937;
    --muted: #64748b;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --danger-dark: #b91c1c;
    --success-bg: #ecfdf5;
    --success-text: #166534;
    --error-bg: #fef2f2;
    --error-text: #b91c1c;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Pretendard", "Noto Sans KR", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 20px 48px;
}

.hero {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-start;
    margin-bottom: 24px;
}

.hero h1 {
    margin: 8px 0 12px;
    font-size: 32px;
    line-height: 1.25;
}

.badge {
    display: inline-block;
    padding: 8px 12px;
    border-radius: 999px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 13px;
    font-weight: 700;
}

.subtext {
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.card-wide {
    grid-column: 1 / -1;
}

.card h2 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 22px;
}

.form-stack {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

label {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

label span {
    font-size: 14px;
    font-weight: 600;
}

input {
    height: 44px;
    padding: 0 14px;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    outline: none;
    font-size: 15px;
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

button {
    height: 44px;
    border: none;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
}

button:hover {
    background: var(--primary-dark);
}

button.secondary {
    background: #e2e8f0;
    color: #0f172a;
}

button.secondary:hover {
    background: #cbd5e1;
}

button.danger {
    background: var(--danger);
}

button.danger:hover {
    background: var(--danger-dark);
}

.tips {
    margin-top: 18px;
    padding: 14px;
    border-radius: 14px;
    background: #f8fafc;
    border: 1px solid var(--line);
    color: var(--muted);
}

.status {
    padding: 12px 14px;
    border-radius: 12px;
    font-weight: 700;
    margin-bottom: 14px;
    background: #eef2ff;
    color: #3730a3;
}

.status.success {
    background: var(--success-bg);
    color: var(--success-text);
}

.status.error {
    background: var(--error-bg);
    color: var(--error-text);
}

.response-box {
    margin: 0;
    padding: 18px;
    border-radius: 14px;
    background: #0f172a;
    color: #e2e8f0;
    overflow: auto;
    min-height: 240px;
    font-size: 14px;
    line-height: 1.55;
}

code {
    background: #e2e8f0;
    padding: 2px 6px;
    border-radius: 8px;
}

@media (max-width: 860px) {
    .hero {
        flex-direction: column;
    }

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