:root {
    --bg: #e7eef7;
    --bg-deep: #d4e0ef;
    --panel: rgba(255, 255, 255, 0.96);
    --panel-strong: #f8fbff;
    --ink: #12253e;
    --muted: #57708f;
    --brand: #11396d;
    --brand-strong: #0a274c;
    --accent: #1b6fb0;
    --accent-soft: #dceaf8;
    --line: #c7d6e6;
    --success: #0e7a46;
    --shadow: rgba(17, 57, 109, 0.10);
}

* {
    box-sizing: border-box;
}

html {
    font-size: 14px;
}

body {
    margin: 0;
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(27, 111, 176, 0.18) 0%, transparent 30%),
        linear-gradient(140deg, #f7fbff 0%, var(--bg) 48%, var(--bg-deep) 100%);
    color: var(--ink);
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

h2,
h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

h2 {
    font-size: 1.05rem;
}

h3 {
    font-size: 0.95rem;
}

.hint {
    color: var(--muted);
    font-size: 0.85rem;
    line-height: 1.4;
}

.ok {
    color: var(--success);
}

.is-hidden {
    display: none !important;
}

@media (max-width: 1100px) {
    body {
        overflow-x: hidden;
        overflow-y: auto;
    }
}