:root {
    --pad: 16px;
    --radius: 16px;
    --shadow: 0 10px 30px rgba(0, 0, 0, .08);
}

* {
    box-sizing: border-box
}

body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
    line-height: 1.5;
    margin: 0;
    background: #0b1020;
    color: #eaf2ff
}

header {
    padding: 32px 20px;
    text-align: center
}

h1 {
    font-size: clamp(28px, 4vw, 40px);
    margin: 0 0 6px
}

header p {
    opacity: .8;
    margin: 0
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px
}

.grid {
    display: grid;
    gap: 20px;
    grid-template-columns: 1fr
}

@media(min-width:960px) {
    .grid {
        grid-template-columns: 1fr 1fr
    }
}

.card {
    background: linear-gradient(180deg, #111835, #0b1020);
    border: 1px solid rgba(255, 255, 255, .06);
    border-radius: var(--radius);
    padding: var(--pad);
    box-shadow: var(--shadow)
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px
}

textarea {
    width: 100%;
    min-height: 160px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, .1);
    background: #0e1530;
    color: #eaf2ff;
    padding: 12px;
    font-family: ui-monospace, Menlo, Consolas, monospace
}

.row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center
}

.btn {
    appearance: none;
    border: 1px solid rgba(255, 255, 255, .1);
    background: #1a2350;
    color: #fff;
    padding: 10px 14px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600
}

.btn:hover {
    background: #22306e
}

.muted {
    opacity: .8;
    font-size: .95em
}

code,
kbd {
    background: #121a3f;
    border: 1px solid rgba(255, 255, 255, .08);
    padding: 2px 6px;
    border-radius: 8px
}

.pill {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    background: #121a3f;
    border: 1px solid rgba(255, 255, 255, .08);
    margin-right: 6px
}

footer {
    opacity: .8;
    text-align: center;
    padding: 30px
}

.ok {
    color: #7fffb0
}

.err {
    color: #ff9a9a
}