/* ===== Base layout ===== */

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Roboto", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f7fb;
    color: #222;
}

/* ===== Header ===== */

.ug-header {
    background: #101827;
    color: #fff;
    padding: 0.75rem 0;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
    position: sticky;
    top: 0;
    z-index: 20;
}

.ug-header-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ug-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #f9fafb;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
}

.ug-brand img {
    height: 34px;
    width: auto;
    border-radius: 8px;
}

.ug-header-actions {
    display: flex;
    gap: 0.5rem;
}

.ug-header-link {
    border-radius: 999px;
    padding: 0.4rem 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: #e5e7eb;
    text-decoration: none;
    border: 1px solid transparent;
    background: transparent;
}

.ug-header-link.primary {
    background: #2563eb;
    border-color: #1d4ed8;
    color: #f9fafb;
}

.ug-header-link:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.18);
}

.ug-header-link.primary:hover {
    background: #1d4ed8;
}

/* ===== Main layout ===== */

.ug-main {
    max-width: 1120px;
    margin: 1.5rem auto 2.5rem;
    padding: 0 1.25rem;
    display: grid;
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    gap: 1.75rem;
}

/* ===== TOC ===== */

.ug-toc {
    background: #ffffff;
    border-radius: 1rem;
    padding: 1rem 1.25rem;
    box-shadow: 0 1px 4px rgba(15, 23, 42, 0.08);
    position: sticky;
    top: 4.5rem;
    align-self: flex-start;
}

.ug-toc h2 {
    margin-top: 0;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #6b7280;
}

.ug-toc ul {
    list-style: none;
    padding-left: 0;
    margin: 0.5rem 0 0;
}

.ug-toc li {
    margin-bottom: 0.35rem;
}

.ug-toc a {
    text-decoration: none;
    color: #111827;
    font-size: 0.92rem;
}

.ug-toc a:hover {
    color: #2563eb;
}

/* ===== Content ===== */

.ug-content {
    min-width: 0;
}

.ug-section {
    background: #ffffff;
    border-radius: 1rem;
    padding: 1.5rem 1.75rem;
    margin-bottom: 1.25rem;
    box-shadow: 0 1px 4px rgba(15, 23, 42, 0.06);
}

.ug-section h1 {
    margin-top: 0;
    margin-bottom: 0.4rem;
    font-size: 1.8rem;
}

.ug-section h2 {
    margin-top: 1.3rem;
    margin-bottom: 0.5rem;
    font-size: 1.35rem;
}

.ug-section h3 {
    margin-top: 1.1rem;
    margin-bottom: 0.35rem;
    font-size: 1.12rem;
}

.ug-lead {
    margin-top: 0;
    color: #4b5563;
    font-size: 1rem;
}

.ug-subsection {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid #e5e7eb;
}

p {
    line-height: 1.6;
    margin: 0.4rem 0 0.6rem;
}

ul, ol {
    padding-left: 1.25rem;
    margin: 0.3rem 0 0.8rem;
}

li {
    line-height: 1.6;
    margin-bottom: 0.2rem;
}

/* system tag */

.ug-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    background: #eff6ff;
    color: #1d4ed8;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0.35rem 0;
}

/* Quote */

blockquote {
    margin: 0.5rem 0 0.8rem;
    padding: 0.6rem 0.9rem;
    border-left: 3px solid #2563eb;
    background: #f3f4ff;
    font-style: italic;
    color: #374151;
}

/* Figures / screenshots */

.ug-figure {
    margin: 0.7rem 0 1rem;
    padding: 0.7rem;
    border-radius: 0.75rem;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
}

.ug-figure img {
    max-width: 100%;
    display: block;
    border-radius: 0.5rem;
}

.ug-figure figcaption {
    margin-top: 0.45rem;
    font-size: 0.86rem;
    color: #6b7280;
}

/* Small pill indicators for support/resistance legend */

.ug-pill {
    display: inline-block;
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 999px;
    margin-right: 0.25rem;
    vertical-align: middle;
}

.ug-pill.red {
    background: #dc2626;
}

.ug-pill.green {
    background: #16a34a;
}

/* Footer */

.ug-footer {
    max-width: 1120px;
    margin: 0 auto 1.5rem;
    padding: 0 1.25rem;
    text-align: center;
    font-size: 0.85rem;
    color: #6b7280;
}

/* ===== Responsive ===== */

@media (max-width: 900px) {
    .ug-main {
        grid-template-columns: minmax(0, 1fr);
    }
    .ug-toc {
        position: static;
        order: -1;
    }
}

@media (max-width: 600px) {
    .ug-section {
        padding: 1.25rem 1.1rem;
    }
    .ug-header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.4rem;
    }
    .ug-header-actions {
        align-self: stretch;
        justify-content: flex-start;
    }
}