:root {
    --gde-accent: #0d7f6c;
    --gde-accent-dark: #096556;
    --gde-text: #24343a;
    --gde-muted: #65757b;
    --gde-line: #dce5e2;
    --gde-soft: #f5f8f7;
    --gde-page: #ffffff;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--gde-page);
    color: var(--gde-text);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.58;
}

a {
    color: var(--gde-accent);
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid rgba(13, 127, 108, 0.28);
    outline-offset: 2px;
}

.gde-site-header {
    background: #ffffff;
    border-bottom: 1px solid var(--gde-line);
}

.gde-site-header-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 12px 24px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.gde-brand {
    color: var(--gde-accent);
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
}

.gde-platform {
    color: var(--gde-muted);
    font-size: 0.88rem;
}

.gde-page-title {
    max-width: 1120px;
    margin: 0 auto;
    padding: 18px 24px 16px;
    border-bottom: 1px solid var(--gde-line);
}

.gde-breadcrumb {
    margin-bottom: 5px;
    color: var(--gde-muted);
    font-size: 0.82rem;
}

h1 {
    margin: 0 0 5px;
    font-size: 1.9rem;
    line-height: 1.15;
}

.gde-subtitle {
    margin: 0;
    color: #47595f;
}

.gde-layout {
    max-width: 1120px;
    margin: 0 auto;
    padding: 22px 24px;

    display: grid;
    grid-template-columns: 205px minmax(0, 1fr);
    gap: 32px;
}

.gde-page-nav {
    align-self: start;
    position: sticky;
    top: 14px;
}

.gde-page-nav h2 {
    margin: 0 0 9px;
    color: var(--gde-text);
    font-size: 0.95rem;
}

.gde-page-nav a {
    display: block;
    padding: 5px 0;
    color: #405258;
    font-size: 0.91rem;
    text-decoration: none;
}

.gde-page-nav a:hover {
    color: var(--gde-accent);
}

main {
    min-width: 0;
}

section {
    margin: 0 0 28px;
    padding: 0 0 28px;
    border-bottom: 1px solid var(--gde-line);
    scroll-margin-top: 16px;
}

section:last-child {
    margin-bottom: 0;
    border-bottom: 0;
}

h2 {
    margin: 0 0 11px;
    color: #244b52;
    font-size: 1.38rem;
}

h3 {
    margin: 21px 0 7px;
    color: #35565d;
    font-size: 1.04rem;
}

p {
    margin: 0 0 12px;
}

.gde-lead {
    font-size: 1.02rem;
}

.gde-structure {
    margin: 17px 0 4px;
    padding: 15px 19px;

    background: var(--gde-soft);
    border-left: 4px solid var(--gde-accent);

    font-family: Consolas, "Courier New", monospace;
    white-space: pre-line;
}

.gde-definition-list {
    margin: 15px 0 0;
}

.gde-definition-list dt {
    margin-top: 11px;
    font-weight: 700;
}

.gde-definition-list dd {
    margin: 2px 0 0;
}

.gde-steps {
    margin: 13px 0 0;
    padding-left: 1.4rem;
}

.gde-steps li {
    margin: 0 0 9px;
    padding-left: 5px;
}

.gde-tip,
.gde-important {
    margin: 15px 0 0;
    padding: 11px 13px;

    background: var(--gde-soft);
    border-left: 4px solid var(--gde-accent);
}

.gde-tip strong,
.gde-important strong {
    display: block;
    margin-bottom: 2px;
}

table {
    width: 100%;
    margin-top: 13px;
    border-collapse: collapse;
}

th,
td {
    padding: 9px 8px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--gde-line);
}

th {
    background: var(--gde-soft);
    font-size: 0.82rem;
}

ul {
    margin: 10px 0 0;
    padding-left: 1.25rem;
}

.gde-home {
    max-width: 900px;
    margin: 0 auto;
    padding: 32px 24px;
}

.gde-home-list {
    margin-top: 20px;
    border-top: 1px solid var(--gde-line);
}

.gde-home-link {
    display: block;
    padding: 15px 4px;

    border-bottom: 1px solid var(--gde-line);
    text-decoration: none;
}

.gde-home-link strong {
    display: block;
    color: var(--gde-text);
    font-size: 1.05rem;
}

.gde-home-link span {
    color: var(--gde-muted);
}

.gde-site-footer {
    max-width: 1120px;
    margin: 0 auto;
    padding: 13px 24px 26px;

    color: var(--gde-muted);
    font-size: 0.8rem;
    text-align: right;
}

@media (max-width: 820px) {
    .gde-layout {
        grid-template-columns: 1fr;
        gap: 19px;
    }

    .gde-page-nav {
        position: static;
        padding-bottom: 15px;
        border-bottom: 1px solid var(--gde-line);
    }

    .gde-platform {
        display: none;
    }
}

@media (max-width: 560px) {
    .gde-site-header-inner,
    .gde-page-title,
    .gde-layout,
    .gde-site-footer,
    .gde-home {
        padding-right: 16px;
        padding-left: 16px;
    }

    h1 {
        font-size: 1.65rem;
    }
}

@media print {
    .gde-site-header,
    .gde-page-nav {
        display: none;
    }

    .gde-layout {
        display: block;
        max-width: none;
        padding: 0 28px;
    }

    .gde-page-title {
        max-width: none;
        padding: 18px 28px;
    }

    section {
        break-inside: avoid;
    }

    .gde-site-footer {
        max-width: none;
        padding: 16px 28px;
    }
}