/* Precise Scroll Margin for all Anchor Targets */
html {
    scroll-padding-top: calc(var(--nav-height) + 56px) !important;
}

h1[id], h2[id], h3[id], h4[id], section[id], div[id], [id] {
    scroll-margin-top: calc(var(--nav-height) + 56px) !important;
}
/* EtherTransfer Documentation Portal Styles - Harmonized with styles.css */

/* Top Navigation Bar Responsive Adjustments */
@media (max-width: 1100px) {
    .top-nav .nav-links {
        gap: 1rem;
    }
    .top-nav .nav-link {
        font-size: 0.92rem;
    }
    .top-nav .nav-actions {
        gap: 1rem;
        padding-left: 1rem;
        margin-left: 1rem;
    }
}

@media (max-width: 980px) {
    .top-nav .nav-links {
        display: none;
    }
    .top-nav .small-btn {
        display: none;
    }
    .top-nav .mobile-menu-btn {
        display: flex;
    }
    .mobile-nav-drawer {
        display: block;
    }
}

/* Sub-header Category Navigation Bar */
.docs-subnav {
    position: sticky;
    top: var(--nav-height);
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    z-index: 99;
    transition: background-color 0.2s, border-color 0.2s;
    width: 100%;
}

.docs-subnav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.35rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
    box-sizing: border-box;
}

.docs-category-tabs-wrapper {
    flex: 1;
    min-width: 0;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.docs-category-tabs {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 0.15rem 0;
    width: 100%;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.docs-category-tabs::-webkit-scrollbar {
    display: none;
}

.docs-cat-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.65rem;
    border-radius: 8px;
    background-color: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    font-size: 0.86rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    text-decoration: none;
    transition: all 0.15s ease;
    font-family: var(--font-sans);
    flex-shrink: 0;
}

.docs-cat-tab svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    opacity: 0.75;
}

.docs-cat-tab:hover {
    background-color: var(--bg-base);
    color: var(--text-main);
}

.docs-cat-tab:hover svg {
    opacity: 1;
}

.docs-cat-tab.active {
    background-color: var(--text-main);
    color: var(--bg-base);
    font-weight: 600;
}

.docs-cat-tab.active svg {
    opacity: 1;
    color: var(--bg-base);
}

.docs-subnav-search-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.65rem;
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 0.84rem;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
    font-family: var(--font-sans);
    flex-shrink: 0;
}

.docs-subnav-search-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.docs-subnav-search-btn:hover {
    border-color: var(--text-muted);
    color: var(--text-main);
}

.docs-subnav-search-btn kbd {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.05rem 0.3rem;
    font-size: 0.7rem;
    font-family: monospace;
}

@media (max-width: 720px) {
    .search-btn-kbd {
        display: none;
    }
}

@media (max-width: 480px) {
    .search-btn-label {
        display: none;
    }
    .docs-subnav-search-btn {
        padding: 0.35rem 0.45rem;
    }
}

/* Documentation Main Layout */
.docs-layout-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 6rem;
    display: flex;
    gap: 3rem;
    min-height: calc(100vh - var(--nav-height) - 52px);
    box-sizing: border-box;
}

/* Left Sticky Sidebar */
.docs-sidebar-nav {
    width: 240px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--nav-height) + 50px);
    height: calc(100vh - var(--nav-height) - 70px);
    overflow-y: auto;
    padding-right: 0.75rem;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.sidebar-category-block {
    margin-bottom: 1.25rem;
}

.sidebar-category-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 0.25rem 0.5rem;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-doc-link {
    display: block;
    padding: 0.35rem 0.6rem;
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 0.88rem;
    text-decoration: none;
    line-height: 1.4;
    transition: all 0.15s ease;
    margin-bottom: 0.1rem;
}

.sidebar-doc-link:hover {
    background-color: var(--border-color);
    color: var(--text-main);
}

.sidebar-doc-link.active {
    background-color: var(--border-color);
    color: var(--accent);
    font-weight: 600;
}

/* Main Documentation Article Content */
.docs-article {
    flex: 1;
    min-width: 0;
    max-width: 820px;
}

.docs-category-pane {
    display: none;
}

.docs-category-pane.active {
    display: block;
    animation: fadeInPane 0.2s ease-in-out;
}

@keyframes fadeInPane {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.docs-breadcrumb-trail {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.docs-breadcrumb-trail a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.docs-breadcrumb-trail a:hover {
    color: var(--accent);
}

.docs-article h1 {
    font-size: clamp(2rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.docs-article-lead {
    font-size: 1.15rem;
    line-height: 1.65;
    color: var(--text-muted);
    margin-bottom: 2.25rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.docs-chapter-section {
    margin-bottom: 3.5rem;
    scroll-margin-top: calc(var(--nav-height) + 56px) !important;
}

.docs-chapter-section h2 {
    font-size: 1.55rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.docs-chapter-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 1.75rem;
    margin-bottom: 0.65rem;
    color: var(--text-main);
}

.docs-chapter-section h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.docs-chapter-section p {
    font-size: 1.02rem;
    line-height: 1.7;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
}

.docs-chapter-section ul, .docs-chapter-section ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
    color: var(--text-muted);
}

.docs-chapter-section li {
    font-size: 1.02rem;
    line-height: 1.65;
    margin-bottom: 0.45rem;
}

.docs-chapter-section strong {
    color: var(--text-main);
    font-weight: 600;
}

/* Route Links to Code / RFCs */
.source-route-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    font-family: monospace;
    font-size: 0.9em;
    background-color: var(--bg-base);
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    transition: all 0.15s ease;
}

.source-route-link:hover {
    background-color: var(--border-color);
    color: var(--text-main);
}

/* Classic Technical Documentation Notes & Blockquotes */
blockquote.docs-note {
    margin: 1.5rem 0;
    padding: 0.75rem 1.25rem;
    border-left: 3px solid var(--accent);
    background-color: var(--bg-base);
    border-radius: 0 4px 4px 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

blockquote.docs-note strong {
    color: var(--text-main);
    font-weight: 600;
}

/* Multi-OS Switcher */
.docs-os-switcher {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: 1.5rem 0;
    background-color: var(--bg-panel);
}

.docs-os-tabs {
    display: flex;
    background-color: var(--bg-base);
    border-bottom: 1px solid var(--border-color);
    padding: 0.35rem 0.5rem;
    gap: 0.35rem;
}

.docs-os-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.85rem;
    background: transparent;
    border: none;
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: var(--font-sans);
}

.docs-os-tab-btn:hover {
    color: var(--text-main);
}

.docs-os-tab-btn.active {
    background-color: var(--bg-panel);
    color: var(--text-main);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.docs-os-pane {
    display: none;
    padding: 1.25rem;
}

.docs-os-pane.active {
    display: block;
}

/* Documentation Tables - Minimal & Developer-Centric */
.docs-table-container {
    width: 100%;
    overflow-x: auto;
    margin: 1.5rem 0 2rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-panel);
}

.docs-matrix-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
    text-align: left;
}

.docs-matrix-table th {
    background-color: var(--bg-base);
    padding: 0.65rem 0.95rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.docs-matrix-table td {
    padding: 0.75rem 0.95rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-muted);
    vertical-align: top;
    line-height: 1.55;
}

.docs-matrix-table td strong {
    color: var(--text-main);
    font-weight: 600;
}

.docs-matrix-table td code {
    font-family: monospace;
    font-size: 0.86em;
    background-color: var(--bg-base);
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.docs-matrix-table tr:last-child td {
    border-bottom: none;
}

.docs-matrix-table tr:hover td {
    background-color: var(--bg-base);
}

/* Diagrams */
.docs-diagram-box {
    margin: 2rem 0;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    text-align: center;
}

.docs-diagram-box img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.docs-diagram-caption {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}

/* Right Sticky Table of Contents (TOC) */
.docs-toc-sidebar {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--nav-height) + 50px);
    height: calc(100vh - var(--nav-height) - 70px);
    overflow-y: auto;
    padding-left: 0.5rem;
}

.toc-heading {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.toc-nav-list {
    list-style: none;
    padding: 0;
    border-left: 1px solid var(--border-color);
}

.toc-nav-link {
    display: block;
    padding: 0.35rem 0 0.35rem 0.85rem;
    font-size: 0.86rem;
    color: var(--text-muted);
    text-decoration: none;
    line-height: 1.4;
    transition: all 0.15s ease;
    border-left: 2px solid transparent;
    margin-left: -1px;
}

.toc-nav-link:hover {
    color: var(--text-main);
}

.toc-nav-link.active {
    color: var(--accent);
    font-weight: 600;
    border-left-color: var(--accent);
}

.toc-nav-link.sub-item {
    padding-left: 1.4rem;
    font-size: 0.8rem;
}

/* Next / Prev Stepper Navigation */
.docs-page-stepper {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.docs-stepper-btn {
    display: inline-flex;
    flex-direction: column;
    padding: 0.65rem 1rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    min-width: 180px;
    max-width: 320px;
}

.docs-stepper-btn:hover {
    background-color: var(--bg-panel);
    border-color: var(--text-muted);
}

.docs-stepper-btn.next {
    text-align: right;
    margin-left: auto;
}

.stepper-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.15rem;
}

.stepper-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

@media (max-width: 640px) {
    .docs-page-stepper {
        flex-direction: column;
        gap: 0.75rem;
    }
    .docs-stepper-btn {
        width: 100%;
        max-width: 100%;
        min-width: unset;
    }
}

/* Search Modal Overlay */
.docs-search-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding: 12vh 1.5rem 2rem;
}

.docs-search-overlay.active {
    display: flex;
}

.docs-search-dialog {
    width: 100%;
    max-width: 620px;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
}

.search-dialog-header {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    gap: 0.75rem;
}

.search-dialog-header input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 1.1rem;
    font-family: var(--font-sans);
    color: var(--text-main);
    outline: none;
}

.search-dialog-header button {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 0.25rem;
}

.search-dialog-results {
    max-height: 400px;
    overflow-y: auto;
    padding: 0.75rem;
}

.search-hit-item {
    display: block;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background-color 0.15s ease;
    border-bottom: 1px solid var(--border-color);
}

.search-hit-item:last-child {
    border-bottom: none;
}

.search-hit-item:hover {
    background-color: var(--bg-base);
}

.search-hit-category {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.search-hit-title {
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--text-main);
    margin: 0.2rem 0;
}

.search-hit-snippet {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.search-no-results {
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--text-muted);
}

/* Mobile Sidebar Drawer Button */
.mobile-docs-sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    background-color: var(--text-main);
    color: var(--bg-base);
    border: none;
    border-radius: 50%;
    width: 52px;
    height: 52px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    z-index: 98;
    align-items: center;
    justify-content: center;
}

/* Responsive Media Queries */
@media (max-width: 1200px) {
    .docs-toc-sidebar {
        display: none;
    }
    .docs-layout-wrapper {
        gap: 2rem;
    }
}

@media (max-width: 900px) {
    .mobile-docs-sidebar-toggle {
        display: flex;
    }

    .docs-sidebar-nav {
        position: fixed;
        top: calc(var(--nav-height) + 46px);
        left: -300px;
        width: 280px;
        background-color: var(--bg-panel);
        z-index: 97;
        box-shadow: 4px 0 25px rgba(0, 0, 0, 0.15);
        padding: 1.5rem 1rem;
        transition: left 0.25s ease;
    }

    .docs-sidebar-nav.is-open {
        left: 0;
    }

    .docs-layout-wrapper {
        padding: 1.25rem 1.25rem 4rem;
    }

    .docs-page-stepper {
        grid-template-columns: 1fr;
    }

    .docs-stepper-btn.next {
        text-align: left;
    }
}