:root {
    --bg: #f4f3ee;
    --ink: #1f2933;
    --accent: #1d4ed8;
    --accent-soft: #dbeafe;
    --line: #d2d6dc;
    --card: #ffffff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at 20% 10%, #fff9db 0%, transparent 40%),
        radial-gradient(circle at 80% 90%, #dbeafe 0%, transparent 35%),
        var(--bg);
}

.app-shell {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

.hero,
section {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 16px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

h1,
h2 {
    margin-top: 0;
}

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

button {
    appearance: none;
    border: 1px solid var(--accent);
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
}

button.secondary {
    color: var(--accent);
    background: var(--accent-soft);
}

button:hover {
    filter: brightness(1.05);
}

.result {
    margin-top: 12px;
    padding: 12px;
    background: #0f172a;
    color: #e2e8f0;
    border-radius: 10px;
    min-height: 56px;
    overflow-x: auto;
}

.table-wrap {
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    width: 100%;
    min-width: 720px;
}

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

th {
    background: #f8fafc;
}

.delta-up {
    color: #166534;
    font-weight: 700;
}

.delta-down {
    color: #b91c1c;
    font-weight: 700;
}

.delta-flat {
    color: #334155;
    font-weight: 700;
}

@media (max-width: 768px) {
    .app-shell {
        padding: 12px;
    }

    table {
        min-width: 600px;
    }
}