@import url('https://fonts.googleapis.com/css2?family=Ubuntu:wght@400;500;700&display=swap');

:root {
    --accent: #3b82f6;
    --accent-rgb: 59, 130, 246;
    --bg: linear-gradient(135deg, #050f1f 0%, #0a1a33 50%, #0a2547 100%);
    --bar-bg: rgba(15, 20, 40, 0.85);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font: 16px 'Ubuntu', sans-serif;
    line-height: 22px;
    background: var(--bg);
    color: #e0e0e0;
    border-top: 6px solid var(--accent);
    min-height: 100vh;
    word-wrap: break-word;
}

::selection {
    background: var(--accent);
    color: #fff;
}

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

a:hover,
a:focus,
a:active {
    color: #ffffff;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Ubuntu', sans-serif;
    font-weight: normal;
    color: #ffffff;
}

.container {
    max-width: 1018px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.hero {
    padding: 30px 0 35px;
}

.hero h1 {
    font: 36px 'Ubuntu', sans-serif;
    line-height: 42px;
    color: #ffffff;
    letter-spacing: -2px;
    margin-bottom: 4px;
}

.hero h1 span {
    color: var(--accent);
}

.hero .subtitle {
    font-size: 14px;
    line-height: 20px;
    color: #a0aec0;
}

.back-link {
    display: inline-block;
    margin-bottom: 15px;
    font-size: 14px;
    color: #a0aec0;
}

.back-link:hover {
    color: var(--accent);
}

.jump-link {
    display: inline-block;
    margin: 0 0 15px 20px;
    font-size: 14px;
}

/* T-chart: two columns split by a vertical rule under a header rule. */
html {
    scroll-behavior: smooth;
}

.t-chart {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 40px;
}

.t-chart th,
.t-chart td {
    width: 50%;
    padding: 10px 16px;
    text-align: left;
}

.t-chart th {
    font-size: 20px;
    font-weight: normal;
    color: #ffffff;
    border-bottom: 2px solid var(--accent);
}

.t-chart tfoot th {
    border-top: 2px solid var(--accent);
    border-bottom: 0;
}

.t-chart th:first-child,
.t-chart td:first-child {
    border-right: 2px solid var(--accent);
}

.divider {
    height: 0;
    border-top: 1px solid var(--accent);
    margin: 30px 0;
}

/* Home bar: site navigation plus language picker.
   Side padding lines the links up with the content column. */
.home-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: 0 max(20px, calc((100% - 978px) / 2));
    margin-bottom: 30px;
    background: var(--bar-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.home-links {
    display: flex;
    flex-wrap: wrap;
}

.home-links a {
    display: block;
    height: 48px;
    line-height: 48px;
    padding: 0 18px;
    font-size: 17px;
    color: #e0e0e0;
}

.home-links a:hover,
.home-links a:focus,
.home-links a.current {
    background: rgba(var(--accent-rgb), 0.2);
    color: #ffffff;
}

.home-links a.current {
    box-shadow: inset 0 -3px 0 var(--accent);
}

.home-bar select {
    height: 48px;
    padding: 0 18px;
    background: transparent;
    border: 0;
    color: #e0e0e0;
    font: 16px 'Ubuntu', sans-serif;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
}

.home-bar select:hover,
.home-bar select:focus {
    background: rgba(var(--accent-rgb), 0.2);
    outline: none;
}

.home-bar select option {
    background: #1a1a2e;
    color: #e0e0e0;
}

/* Footer */
footer {
    margin-top: 40px;
    padding: 5px 0 20px;
    border-top: 2px dashed rgba(255, 255, 255, 0.15);
    color: #4a5568;
    font-size: 12px;
}