:root {
    --color-primary: #007eb3;
    --color-primary-hover: #2693c2;
    --color-primary-hold: #006f9e;
    --color-secondary: #af1a1f;
    --color-surface: #ffffff;
    --color-surface-soft: #f4f8fb;
    --color-text: #12303f;
    --color-border: #d8e6ef;
    --color-shadow: #1a405c1a;
}

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

body {
    font-family: "Roboto", sans-serif;
    color: var(--color-text);
    background: linear-gradient(160deg, #f3f9fd 0%, #ecf5fb 55%, #e4f1f8 100%);
    overflow: hidden;
}

html,
body {
    height: 100%;
}

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

.public-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.public-header {
    min-height: 4.25rem;
    border-bottom: 2px solid var(--color-primary-hold);
    background: var(--color-surface);
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.45rem 1.25rem;
}

.brand-logo {
    height: 3rem;
    width: auto;
    object-fit: contain;
}

.brand-header {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.brand-header h1 {
    text-align: right;
    text-transform: uppercase;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-primary-hold);
}

.brand-header img {
    height: 2.75rem;
    width: auto;
}

.public-content {
    flex: 1;
    padding: 1rem;
    overflow: hidden;
}

.selector-hero {
    margin: 0 auto 1rem;
    max-width: 860px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.8rem;
    box-shadow: 0 0.45rem 1rem var(--color-shadow);
    padding: 1.1rem 1.2rem;
}

.selector-hero h2 {
    color: var(--color-primary-hold);
    margin-bottom: 0.3rem;
}

.selector-panel {
    margin: 0 auto;
    max-width: 860px;
    max-height: calc(100vh - 11.5rem);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.8rem;
    box-shadow: 0 0.45rem 1rem var(--color-shadow);
    padding: 1rem 1.2rem;
    overflow: hidden;
}

.selector-panel label {
    font-weight: 500;
    color: var(--color-primary-hold);
}

.selector-panel input {
    margin-top: 0.35rem;
    width: 100%;
    border: 1px solid #bcd3e2;
    border-radius: 0.5rem;
    padding: 0.6rem 0.7rem;
    font-size: 0.95rem;
}

.sistema-list {
    list-style: none;
    margin-top: 0.9rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.45rem;
    max-height: calc(100vh - 18rem);
    overflow: auto;
}

.sistema-list li a {
    border: 1px solid var(--color-border);
    border-radius: 0.55rem;
    background: var(--color-surface-soft);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.72rem 0.75rem;
    transition: 0.2s;
}

.sistema-list li a:hover {
    background: #e7f3fb;
    border-color: #9bc4dd;
}

.sistema-list li a i {
    color: var(--color-primary);
}

.manual-page {
    display: grid;
    grid-template-columns: minmax(260px, 340px) 1fr;
    gap: 1rem;
    height: calc(100vh - 6.5rem);
    overflow: hidden;
}

.manual-tree-panel,
.manual-viewer-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.8rem;
    box-shadow: 0 0.45rem 1rem var(--color-shadow);
}

.manual-tree-panel {
    padding: 0.75rem;
    overflow: auto;
}

.panel-header {
    position: sticky;
    top: -0.75rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.2rem 0 0.65rem;
    margin-bottom: 0.7rem;
}

.panel-header h2 {
    color: var(--color-primary-hold);
    margin-bottom: 0.25rem;
}

.menu-search-label {
    display: block;
    margin-top: 0.55rem;
    margin-bottom: 0.2rem;
    font-size: 0.82rem;
    font-weight: 500;
    color: #4b6a7f;
}

.menu-search {
    width: 100%;
    border: 1px solid #bcd3e2;
    border-radius: 0.45rem;
    padding: 0.45rem 0.55rem;
    font-size: 0.88rem;
}

.menu-search:focus {
    outline: 2px solid #a8d6ee;
    border-color: #7ab6d7;
}

.back-link {
    color: var(--color-primary);
    font-size: 0.88rem;
    font-weight: 500;
}

.menu-tree,
.tree-children {
    list-style: none;
}

.tree-children {
    margin-left: 1.15rem;
    display: none;
}

.tree-item.expanded > .tree-children {
    display: block;
}

.tree-item.search-expanded > .tree-children {
    display: block;
}

.tree-row {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.tree-toggle,
.tree-spacer {
    width: 1.5rem;
    min-width: 1.5rem;
    height: 1.5rem;
}

.tree-toggle {
    border: none;
    border-radius: 0.35rem;
    background: transparent;
    color: var(--color-primary);
    cursor: pointer;
}

.tree-toggle:hover {
    background: #d7eefd;
}

.tree-item.expanded > .tree-row .tree-toggle i {
    transform: rotate(90deg);
}

.tree-item.search-expanded > .tree-row .tree-toggle i {
    transform: rotate(90deg);
}

.tree-link {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: 0.35rem;
    padding: 0.35rem 0.45rem;
    font-size: 0.92rem;
}

.tree-link:hover {
    background: #e6f3fc;
}

.tree-item.selected > .tree-row .tree-link {
    background: var(--color-primary);
    color: #fff;
}

.pdf-flag {
    color: var(--color-secondary);
}

.tree-item.selected .pdf-flag {
    color: #fff;
}

.manual-viewer-panel {
    padding: 0.85rem;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.breadcrumb {
    font-size: 0.86rem;
    margin-bottom: 0.7rem;
    color: #476074;
}

.breadcrumb a {
    color: var(--color-primary-hold);
}

.viewer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.7rem;
    gap: 1rem;
}

.viewer-actions h3 {
    color: var(--color-primary-hold);
}

.btn {
    display: inline-block;
    border-radius: 0.45rem;
    background: var(--color-primary);
    color: #fff;
    padding: 0.45rem 0.7rem;
    font-size: 0.85rem;
    font-weight: 500;
    margin-left: 0.3rem;
}

.btn:hover {
    background: var(--color-primary-hover);
}

.btn.secondary {
    background: #50697a;
}

.btn.secondary:hover {
    background: #445c6c;
}

.pdf-viewer {
    width: 100%;
    flex: 1;
    min-height: 0;
    border: 1px solid var(--color-border);
    border-radius: 0.55rem;
    background: #fff;
}

.empty-state,
.empty {
    color: #516879;
    font-size: 0.92rem;
}

.empty-state {
    margin: auto;
    text-align: center;
}

@media (max-width: 980px) {
    .manual-page {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .manual-tree-panel {
        max-height: 45vh;
    }

    .viewer-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .brand-header h1 {
        font-size: 0.9rem;
    }
}