/* QAIL mdBook Theme - Astro navbar parity + flat docs palette */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600;700&family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@500;700&display=swap');

:root {
    /* Override mdBook general.css font-size: 62.5% so 1rem = 16px (matching Astro) */
    font-size: initial !important;

    /* Override menu-bar-height since we hide the toolbar */
    --menu-bar-height: 0px;
    --nav-height: 68px;

    --qail-bg: #0a0a0f;
    --qail-surface: #111b29;
    --qail-surface-2: #0f172a;
    --qail-text: #e2e8f0;
    --qail-muted: #94a3b8;
    --qail-accent: #60a5fa;
    --qail-accent-2: #67e8f9;
    --qail-ok: #4ade80;
    --qail-border: rgba(148, 163, 184, 0.22);
    --qail-transition: all 0.3s ease;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

html {
    background: var(--qail-bg) !important;
    /* Override mdBook Open Sans with Inter to match Astro global */
    font-family: var(--font-sans) !important;
}

.coal,
.navy,
.ayu,
.rust {
    --bg: var(--qail-bg);
    --fg: var(--qail-text);
    --sidebar-bg: #0d1117;
    --sidebar-fg: #cbd5e1;
    --sidebar-active: var(--qail-accent);
    --links: var(--qail-accent);
    --inline-code-color: #22c55e;
    --theme-popup-bg: var(--qail-surface);
    --theme-popup-border: var(--qail-border);
    --quote-bg: rgba(96, 165, 250, 0.08);
    --quote-border: var(--qail-accent);
    --table-border-color: var(--qail-border);
    --table-header-bg: #1b2435;
    --searchbar-border-color: var(--qail-border);
    --searchbar-bg: var(--qail-surface-2);
}

/* Astro-like navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    display: flex;
    align-items: center;
    max-width: 100%;
    margin: 0;
    padding: 16px 32px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none !important;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--qail-text) !important;
    margin-right: 32px;
}

.logo-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.logo-text {
    color: var(--qail-text);
    letter-spacing: 0.01em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--qail-muted) !important;
    text-decoration: none !important;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--qail-transition);
}

.nav-links a:hover {
    color: var(--qail-ok) !important;
}

.nav-links a.active {
    color: var(--qail-ok) !important;
    font-weight: 600;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--qail-transition);
    cursor: pointer;
    border: none;
}

.btn-github {
    background: rgba(255, 255, 255, 0.1);
    color: var(--qail-text) !important;
}

.btn-github:hover {
    background: rgba(255, 255, 255, 0.15);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 200;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--qail-text);
    transition: var(--qail-transition);
}

.mobile-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--qail-surface);
    border-bottom: 1px solid var(--qail-border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transform: translateY(-150%);
    transition: transform 0.3s ease-in-out;
    z-index: 99;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-menu a {
    color: var(--qail-text) !important;
    text-decoration: none !important;
    font-size: 1.02rem;
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.14);
}

.mobile-menu a:last-child {
    border-bottom: none;
    color: var(--qail-accent-2) !important;
}

.mobile-menu a.active {
    color: var(--qail-ok) !important;
}

/* Offset mdBook frame under fixed nav */
body {
    padding-top: var(--nav-height) !important;
    font-family: var(--font-sans) !important;
    font-size: 1rem !important;
    line-height: 1.6;
    color: var(--qail-text);
}

.sidebar {
    top: var(--nav-height) !important;
    height: calc(100vh - var(--nav-height)) !important;
    background: transparent !important;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

/* Hide the mdBook toolbar — it creates a double-header with our nav */
.menu-bar,
.menu-bar-sticky-container,
#mdbook-menu-bar-hover-placeholder {
    display: none !important;
}

/* Compensate for hidden menu-bar */
.page {
    margin-block-start: 0 !important;
    padding-top: 1.5rem !important;
}

/* Fix page wrapper background */
.page-wrapper {
    background-color: var(--qail-bg) !important;
}

/* Fix prev/next chapter arrows to be below our fixed nav */
.nav-chapters {
    top: var(--nav-height) !important;
}

/* Fix anchor scroll targets to account for our nav */
:target {
    scroll-margin-top: calc(var(--nav-height) + 0.5em) !important;
}

.icon-button,
.icon-button .fa-svg {
    color: var(--qail-muted);
}

.icon-button:hover,
.icon-button:hover .fa-svg {
    color: var(--qail-accent-2);
}

/* Sidebar */
.sidebar .sidebar-scrollbox {
    background: transparent;
    padding-top: 0 !important;
}

.sidebar a {
    color: #94a3b8 !important;
    padding: 0.4rem 1.5rem;
    display: block;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.sidebar a:hover {
    color: #cbd5e1 !important;
}

.sidebar a.active {
    color: #ffffff !important;
    font-weight: 600;
}

/* Sidebar Hierarchy Tree Lines (for nested sections) */
.sidebar .section {
    padding-inline-start: 0 !important;
    margin-left: 1.25rem !important;
    border-left: none; /* Trunk is drawn on li elements */
}

.sidebar .section li {
    position: relative;
    margin: 0;
}

/* Horizontal branch */
.sidebar .section li::before {
    content: "";
    position: absolute;
    top: 15px;
    left: 0;
    width: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 1;
}

/* Vertical trunk */
.sidebar .section li::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
}

/* Perfectly terminate vertical line on last item (└─) */
.sidebar .section li:last-child::after {
    bottom: auto;
    height: 16px; /* 15px top + 1px border */
}

.sidebar .section a {
    padding-left: 1.2rem;
}

/* Main content */
.content {
    background: var(--qail-bg);
}

.content main {
    max-width: 750px;
    font-family: var(--font-sans);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: #f8fafc;
    font-family: var(--font-display);
}

h1 {
    font-size: 2.35rem;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.65rem;
    border-bottom: none;
    padding-bottom: 0;
    margin-top: 2.5rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.3rem;
    color: #e2e8f0;
    margin-top: 2rem;
}

p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #bac2de;
}

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

a:hover {
    color: var(--qail-accent-2);
    text-decoration: underline;
}

/* Code */
pre {
    background: #0d1117 !important;
    border: 1px solid #1e293b;
    border-radius: 8px;
    padding: 1.25rem !important;
    box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.2);
}

code {
    font-family: var(--font-mono) !important;
    font-size: 0.9em;
}

:not(pre)>code {
    background: rgba(255, 255, 255, 0.08);
    color: #38bdf8;
    padding: 0.16rem 0.4rem;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Tables */
table {
    border-collapse: collapse;
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    margin: 2rem 0;
}

th,
td {
    border-top: 1px solid #1e293b;
    border-bottom: 1px solid #1e293b;
    padding: 0.85rem 1rem;
    border-left: none;
    border-right: none;
    color: #bac2de;
}

th {
    background: #0f172a;
    color: #94a3b8;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
}

tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

blockquote {
    background: linear-gradient(to right, rgba(30, 58, 138, 0.1), transparent);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-left: 1px solid rgba(255, 255, 255, 0.6);
    padding: 1.2rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 8px;
}

blockquote p {
    color: #e2e8f0;
    margin: 0;
}

/* On-This-Page TOC */
.on-this-page {
    border-inline-start: none !important;
    margin-left: 0 !important;
    padding-left: 0 !important;
}

.on-this-page .chapter-item {
    border-left: 1px solid rgba(255, 255, 255, 0.05);
    padding-left: 0.5rem;
    margin-left: 0.5rem;
}

#searchbar {
    background: var(--qail-surface-2) !important;
    border: 1px solid var(--qail-border) !important;
    border-radius: 8px !important;
    color: var(--qail-text) !important;
}

#theme-list,
.theme-popup {
    display: none !important;
}

.nav-chapters {
    background: rgba(96, 165, 250, 0.1);
    border-radius: 8px;
    padding: 0.5rem 1rem;
}

.nav-chapters:hover {
    background: rgba(96, 165, 250, 0.16);
}

.content ul,
.content ol {
    padding-left: 1.5rem;
}

.content li {
    margin: 0.5rem 0;
    font-size: 1.05rem;
    line-height: 1.8;
    color: #bac2de;
}

/* Sidebar Section Headers */
.sidebar .part-title {
    color: #64748b;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 2rem 1.5rem 0.5rem 1.5rem;
    margin: 0;
}

::selection {
    background: rgba(96, 165, 250, 0.3);
}

@media (max-width: 768px) {
    .nav-container {
        padding: 14px 16px;
    }

    .nav-links {
        display: none;
    }

    .btn-icon-only-mobile .btn-text {
        display: none;
    }

    .btn-icon-only-mobile {
        padding: 8px;
    }

    .mobile-toggle {
        display: flex;
    }
}