:root {
    --bg: #f4f8fb;
    --card: #ffffff;
    --text: #1a2530;
    --muted: #5b6a79;
    --line: #d9e2ea;
    --primary: #1273de;
    --danger: #bc2a3a;
    --success: #157347;
    --radius: 14px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Helvetica Neue", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 10% 20%, #dff1ff 0%, transparent 45%),
        radial-gradient(circle at 90% 10%, #d5ffe4 0%, transparent 40%),
        var(--bg);
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
}

.container {
    width: min(1120px, 92%);
    margin: 0 auto;
}

.topbar {
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(6px);
    position: sticky;
    top: 0;
    z-index: 30;
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}

.brand {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.4px;
    color: var(--text);
}

.nav-links {
    display: flex;
    gap: 14px;
    align-items: center;
}

.page-content {
    padding: 28px 0 48px;
}

.hero {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
    align-items: start;
}

.hero h1 {
    margin-top: 0;
    font-size: clamp(2rem, 3vw, 3rem);
}

.hero-card,
.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: 0 8px 20px rgba(14, 32, 53, 0.06);
}

.hero-actions {
    margin-top: 18px;
    display: flex;
    gap: 10px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 9px 14px;
    background: #fff;
    color: var(--text);
    cursor: pointer;
}

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

.btn-danger {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff;
}

.flash-stack {
    margin-bottom: 14px;
}

.flash {
    padding: 10px 12px;
    border-radius: 10px;
    margin-bottom: 8px;
}

.flash-success {
    background: #e8f7ef;
    border: 1px solid #b2e1c5;
}

.flash-danger {
    background: #fdecee;
    border: 1px solid #f6c3ca;
}

.flash-warning,
.flash-info {
    background: #eef5ff;
    border: 1px solid #c9dcff;
}

label {
    display: block;
    margin: 10px 0 6px;
    font-weight: 600;
}

input,
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--line);
    font: inherit;
}

textarea {
    resize: vertical;
}

.error {
    margin: 6px 0 0;
    color: var(--danger);
    font-size: 0.9rem;
}

.grid {
    display: grid;
    gap: 14px;
}

.two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.slim-card {
    width: min(520px, 100%);
    margin: 0 auto;
}

.stack-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.muted {
    color: var(--muted);
}

pre {
    background: #0e1621;
    color: #e6f0ff;
    padding: 12px;
    border-radius: 10px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

th,
td {
    text-align: left;
    padding: 10px;
    border-bottom: 1px solid var(--line);
}

.checkbox-row {
    margin: 12px 0;
    display: flex;
    gap: 8px;
    align-items: center;
}

.inline-check {
    margin-top: 34px;
}

.console-history {
    margin-top: 14px;
    display: grid;
    gap: 12px;
}

.console-run {
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 12px;
    background: #f9fbfd;
}

.console-run p {
    margin: 0 0 6px;
}

.console-output {
    margin: 0;
    background: #09131f;
    color: #dcecff;
}

.console-error {
    border-left: 4px solid #ef6876;
}

@media (max-width: 900px) {
    .hero,
    .two-col {
        grid-template-columns: 1fr;
    }

    .nav-wrap {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .stack-between {
        flex-direction: column;
        align-items: flex-start;
    }
}