/* ============================================================
   jt-pve-storage-netapp Documentation
   Design: Navy + Indigo, documentation-focused, no gimmicks
   ============================================================ */

:root {
    --navy: #0f2547;
    --navy-mid: #152d50;
    --indigo: #4f46e5;
    --indigo-hover: #4338ca;
    --indigo-light: #a5b4fc;
    --indigo-subtle: rgba(79, 70, 229, 0.07);

    --text: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --surface-0: #ffffff;
    --surface-1: #f8fafc;
    --surface-2: #f1f5f9;
    --surface-3: #e8ecf1;

    --border: #e2e8f0;
    --border-light: #f1f5f9;

    --code-bg: #1a1f2e;
    --code-text: #d4d4d8;

    --red: #dc2626;
    --red-subtle: #fef2f2;
    --amber: #d97706;
    --amber-subtle: #fffbeb;
    --blue: #2563eb;
    --blue-subtle: #eff6ff;
    --green: #16a34a;
    --green-subtle: #f0fdf4;

    --sidebar-w: 272px;
    --header-h: 56px;
    --content-w: 920px;
    --section-px: 48px;

    --font: -apple-system, BlinkMacSystemFont, "Segoe UI",
            "PingFang TC", "Microsoft JhengHei", "Noto Sans TC",
            "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo,
            Consolas, "Liberation Mono", monospace;

    --radius: 6px;
    --radius-lg: 10px;
}

/* -- Language -- */
html[data-lang="en"] .lang-zh { display: none !important; }
html[data-lang="zh"] .lang-en { display: none !important; }

/* -- Reset -- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 20px); }

body {
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text);
    background: var(--surface-1);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--indigo); text-decoration: none; }
a:hover { color: var(--indigo-hover); }
img { max-width: 100%; height: auto; display: block; }

/* ============================================================
   Header
   ============================================================ */
.top-nav {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: #0d0d12;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 20px;
}

.top-nav__brand {
    display: flex; align-items: center; gap: 10px;
    color: #fff; font-weight: 700; font-size: 0.95rem;
    letter-spacing: -0.01em;
}
.top-nav__brand-icon {
    width: 30px; height: 30px;
    background: var(--indigo); border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 0.75rem; color: #fff;
}
.top-nav__actions { display: flex; align-items: center; gap: 8px; }

.lang-toggle {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.12);
    color: rgba(255,255,255,0.9); padding: 5px 12px;
    border-radius: 5px; cursor: pointer;
    font-size: 0.8rem; font-family: var(--font);
    transition: background 0.15s;
}
.lang-toggle:hover { background: rgba(255,255,255,0.18); }

.github-link {
    display: flex; align-items: center; gap: 5px;
    color: rgba(255,255,255,0.8); font-size: 0.8rem;
    padding: 5px 12px; border-radius: 5px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    transition: background 0.15s;
}
.github-link:hover { background: rgba(255,255,255,0.14); color: #fff; }

.hamburger {
    display: none; background: none; border: none;
    color: #fff; cursor: pointer; padding: 4px;
}
.hamburger svg { width: 22px; height: 22px; }

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
    position: fixed;
    top: var(--header-h); left: 0; bottom: 0;
    width: var(--sidebar-w);
    background: var(--surface-2);
    border-right: 1px solid var(--border);
    overflow-y: auto; padding: 16px 0;
    z-index: 900; transition: transform 0.25s ease;
}
.sidebar__section { padding: 0 12px; margin-bottom: 4px; }

.sidebar__search {
    padding: 0 12px 12px;
}
.sidebar__search-input {
    width: 100%; padding: 7px 10px 7px 32px;
    border: 1px solid var(--border); border-radius: 6px;
    font-size: 0.82rem; font-family: var(--font);
    color: var(--text); background: var(--surface-1);
    outline: none; transition: border-color 0.15s;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.3-4.3'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 10px center;
}
.sidebar__search-input:focus {
    border-color: var(--indigo);
    background-color: var(--surface-0);
}
.sidebar__search-input::placeholder { color: var(--text-muted); }

.sidebar__heading {
    font-size: 0.82rem; font-weight: 700;
    letter-spacing: 0.01em;
    color: var(--text);
    padding: 16px 10px 6px;
}

.sidebar__link {
    display: block; padding: 6px 10px;
    font-size: 0.82rem; color: var(--text-secondary);
    border-radius: 5px; transition: all 0.12s;
    line-height: 1.45; margin-left: 10px;
}
.sidebar__link:hover { color: var(--text); background: var(--surface-2); }
.sidebar__link.active {
    color: var(--indigo); background: var(--indigo-subtle);
    font-weight: 600;
}

.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ============================================================
   Main Content
   ============================================================ */
.main-content {
    margin-left: var(--sidebar-w);
    margin-top: var(--header-h);
    min-height: calc(100vh - var(--header-h));
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
    background: linear-gradient(160deg, #131029 0%, #1a1040 45%, #0f1d3a 100%);
    position: relative; overflow: hidden;
    padding: 72px var(--section-px) 64px;
    color: #fff;
}
.hero__grid-bg {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 52px 52px;
    pointer-events: none;
}
.hero__glow {
    position: absolute; top: -180px; right: -80px;
    width: 420px; height: 420px;
    background: radial-gradient(circle, rgba(79,70,229,0.12) 0%, transparent 65%);
    pointer-events: none;
}
.hero__glow-left {
    position: absolute; bottom: -120px; left: -100px;
    width: 380px; height: 380px;
    background: radial-gradient(circle, rgba(99,102,241,0.08) 0%, transparent 65%);
    pointer-events: none;
}
.hero__content { position: relative; max-width: 720px; }

.hero__badge {
    display: inline-flex; align-items: center;
    background: rgba(79,70,229,0.18);
    border: 1px solid rgba(79,70,229,0.25);
    color: var(--indigo-light);
    padding: 3px 12px; border-radius: 100px;
    font-size: 0.75rem; font-weight: 600;
    margin-bottom: 18px;
}
.hero__badge-sep {
    display: inline-block; width: 1px; height: 10px;
    background: rgba(165,180,252,0.35);
    margin: 0 8px; vertical-align: middle;
}

.hero__title {
    font-size: clamp(2.2rem, 3.5vw, 3rem);
    font-weight: 800; line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 10px;
    font-family: var(--mono);
    color: #fff;
}
.hero__project-desc {
    font-size: clamp(1rem, 1.8vw, 1.2rem);
    color: rgba(255,255,255,0.8);
    font-weight: 500; line-height: 1.4;
    margin-bottom: 12px;
}
.hero__subtitle {
    font-size: 0.92rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.65;
    margin-bottom: 24px;
    max-width: 580px;
}
.hero__actions { display: flex; gap: 10px; flex-wrap: wrap; }

.btn {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 9px 20px; border-radius: 6px;
    font-size: 0.85rem; font-weight: 600;
    font-family: var(--font); cursor: pointer;
    transition: all 0.15s; border: none; text-decoration: none;
}
.btn--primary {
    background: var(--indigo); color: #fff;
    box-shadow: 0 1px 3px rgba(79,70,229,0.3);
}
.btn--primary:hover {
    background: var(--indigo-hover); color: #fff;
    box-shadow: 0 2px 8px rgba(79,70,229,0.35);
}
.btn--outline {
    background: transparent; color: rgba(255,255,255,0.9);
    border: 1px solid rgba(255,255,255,0.2);
}
.btn--outline:hover {
    background: rgba(255,255,255,0.08); color: #fff;
    border-color: rgba(255,255,255,0.3);
}

/* ============================================================
   Content Sections
   ============================================================ */
.content-wrap { max-width: none; padding: 0; margin: 0; }

.doc-section {
    padding: 56px calc((100% - var(--content-w)) / 2);
    padding-top: 56px;
    padding-bottom: 56px;
    min-height: 0;
}
@media (max-width: 1024px) {
    .doc-section { padding-left: 24px; padding-right: 24px; }
}
@media (max-width: 640px) {
    .doc-section { padding-left: 16px; padding-right: 16px; }
}

/* Alternating backgrounds with enough contrast to notice */
.doc-section:nth-child(odd)  { background: var(--surface-0); }
.doc-section:nth-child(even) { background: var(--surface-1); }

/* Thin separator between sections */
.doc-section + .doc-section {
    border-top: 1px solid var(--border);
}

/* Accent top for safety-critical sections */
.doc-section--accent {
    border-top: 3px solid var(--red) !important;
    background: var(--red-subtle) !important;
}

.doc-section:last-child { border-bottom: none; }

/* -- Section Headings -- */
.section-title {
    font-size: 1.45rem; font-weight: 700;
    color: var(--navy); margin-bottom: 6px;
    letter-spacing: -0.015em; line-height: 1.3;
}

.section-subtitle {
    font-size: 0.9rem; color: var(--text-secondary);
    margin-bottom: 28px; line-height: 1.6;
}

.subsection-title {
    font-size: 1.05rem; font-weight: 600;
    color: var(--navy); margin: 28px 0 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-light);
}

.subsection-title-sm {
    font-size: 0.95rem; font-weight: 600;
    color: var(--text); margin: 20px 0 8px;
}

/* -- Paragraphs & Lists -- */
.doc-section p { margin-bottom: 10px; font-size: 0.9rem; color: var(--text-secondary); }
.doc-section ul, .doc-section ol { margin: 6px 0 14px 18px; font-size: 0.9rem; }
.doc-section li { margin-bottom: 4px; line-height: 1.6; color: var(--text-secondary); }

/* ============================================================
   Alerts
   ============================================================ */
.alert {
    padding: 14px 18px; border-radius: var(--radius);
    border-left: 3px solid; margin: 16px 0;
    font-size: 0.87rem; line-height: 1.6;
}
.alert strong { font-weight: 600; }

.alert--danger  { background: var(--red-subtle);   border-color: var(--red);   color: #7f1d1d; }
.alert--warning { background: var(--amber-subtle); border-color: var(--amber); color: #78350f; }
.alert--info    { background: var(--blue-subtle);  border-color: var(--blue);  color: #1e3a5f; }
.alert--success { background: var(--green-subtle); border-color: var(--green); color: #14532d; }

/* ============================================================
   Feature Cards
   ============================================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 14px;
}

.card {
    background: var(--surface-0);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.card:hover {
    border-color: #c7d2fe;
    box-shadow: 0 4px 12px rgba(15,37,71,0.06);
}

.card__icon {
    width: 38px; height: 38px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 12px;
}
.card__icon svg { flex-shrink: 0; }

.card:nth-child(3n+1) .card__icon { background: rgba(79,70,229,0.08);  color: var(--indigo); }
.card:nth-child(3n+2) .card__icon { background: rgba(14,165,233,0.08); color: #0284c7; }
.card:nth-child(3n)   .card__icon { background: rgba(139,92,246,0.08); color: #7c3aed; }

.card__title {
    font-size: 0.88rem; font-weight: 600;
    color: var(--text); margin-bottom: 4px;
}
.card__desc {
    font-size: 0.82rem; color: var(--text-muted);
    line-height: 1.5;
}

/* ============================================================
   Tables
   ============================================================ */
.table-wrap {
    overflow-x: auto; margin: 14px 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }

thead { background: var(--surface-2); }
th {
    padding: 10px 14px; text-align: left;
    font-weight: 600; font-size: 0.78rem;
    color: var(--text-secondary);
    text-transform: uppercase; letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
}
td {
    padding: 9px 14px;
    border-bottom: 1px solid var(--border-light);
    vertical-align: top; color: var(--text-secondary);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--indigo-subtle); }

td code {
    background: var(--indigo-subtle);
    padding: 1px 5px; border-radius: 3px;
    font-family: var(--mono); font-size: 0.8rem;
    color: var(--indigo);
}

/* ============================================================
   Code
   ============================================================ */
pre {
    background: var(--code-bg);
    color: var(--code-text);
    padding: 18px 22px;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    font-family: var(--mono); font-size: 0.82rem;
    line-height: 1.65; margin: 14px 0;
    border: 1px solid rgba(255,255,255,0.04);
}
pre .comment { color: #6b7280; }
pre .keyword { color: #a78bfa; }
pre .string  { color: #6ee7b7; }
pre .cmd     { color: #7dd3fc; }
pre .flag    { color: #f9a8d4; }
pre .output  { color: #9ca3af; }

code { font-family: var(--mono); font-size: 0.84em; }
p code, li code {
    background: var(--indigo-subtle);
    padding: 1px 5px; border-radius: 3px;
    font-size: 0.82em; color: var(--indigo);
}

.config-block {
    background: var(--code-bg); color: var(--code-text);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
    font-family: var(--mono); font-size: 0.82rem;
    line-height: 1.6; margin: 12px 0;
    white-space: pre-wrap;
}

.ascii-diagram {
    background: var(--code-bg);
    color: var(--indigo-light);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.04);
    overflow-x: auto;
    font-family: Menlo, "DejaVu Sans Mono", "Liberation Mono", "Courier New", monospace;
    font-size: 12.5px; line-height: 1.4;
    margin: 14px 0; white-space: pre;
    font-variant-ligatures: none;
    -webkit-text-size-adjust: none;
}

.diagram {
    margin: 18px 0;
    padding: 16px;
    background: var(--surface-0);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
}
.diagram img {
    max-width: 100%;
    height: auto;
    display: inline-block;
}

/* ============================================================
   Collapsible (details/summary)
   ============================================================ */
details {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin: 8px 0; background: var(--surface-0);
}
details[open] { box-shadow: 0 1px 4px rgba(0,0,0,0.04); }

summary {
    padding: 12px 16px; cursor: pointer;
    font-weight: 600; font-size: 0.9rem;
    color: var(--text); list-style: none;
    display: flex; align-items: center; gap: 8px;
    user-select: none;
}
summary::before {
    content: ""; display: inline-block;
    width: 5px; height: 5px;
    border-right: 1.5px solid var(--text-muted);
    border-bottom: 1.5px solid var(--text-muted);
    transform: rotate(-45deg); transition: transform 0.15s;
    flex-shrink: 0;
}
details[open] > summary::before { transform: rotate(45deg); }
summary::-webkit-details-marker { display: none; }

details .detail-content {
    padding: 0 16px 16px;
    font-size: 0.87rem; color: var(--text-secondary);
    line-height: 1.65;
}

/* ============================================================
   Changelog
   ============================================================ */
.changelog-entry {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-light);
}
.changelog-entry:last-child { border-bottom: none; }

.changelog-version {
    font-size: 0.95rem; font-weight: 700;
    color: var(--text); margin-bottom: 2px;
    font-family: var(--mono);
}
.changelog-date {
    font-size: 0.78rem; color: var(--text-muted); margin-bottom: 6px;
}

.changelog-tag {
    display: inline-block; font-size: 0.65rem; font-weight: 700;
    padding: 1px 6px; border-radius: 3px;
    margin-right: 4px; text-transform: uppercase; letter-spacing: 0.03em;
}
.changelog-tag--critical { background: var(--red-subtle);   color: var(--red); }
.changelog-tag--feature  { background: var(--green-subtle); color: var(--green); }
.changelog-tag--fix      { background: var(--blue-subtle);  color: var(--blue); }

.changelog-summary {
    font-size: 0.85rem; color: var(--text-secondary); line-height: 1.55;
}
.changelog-summary ul { margin: 6px 0; padding-left: 18px; }
.changelog-summary li { margin-bottom: 3px; }

/* ============================================================
   Steps (installation)
   ============================================================ */
.step { display: flex; gap: 14px; margin: 16px 0; }

.step__number {
    width: 28px; height: 28px;
    background: var(--navy); color: #fff;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.78rem;
    flex-shrink: 0; margin-top: 1px;
}
.step__content { flex: 1; min-width: 0; }
.step__title {
    font-weight: 600; font-size: 0.9rem;
    color: var(--text); margin-bottom: 6px;
}

/* ============================================================
   Status badges
   ============================================================ */
.status-badge {
    display: inline-block; font-size: 0.72rem; font-weight: 600;
    padding: 1px 8px; border-radius: 100px;
}
.status-badge--supported { background: var(--green-subtle); color: var(--green); }
.status-badge--partial   { background: var(--amber-subtle); color: var(--amber); }
.status-badge--planned   { background: var(--blue-subtle);  color: var(--blue); }

/* ============================================================
   Module list
   ============================================================ */
.module-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 10px; margin: 14px 0;
}
.module-item {
    background: var(--surface-0);
    border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px;
}
.module-item__name {
    font-family: var(--mono); font-size: 0.85rem;
    font-weight: 600; color: var(--indigo); margin-bottom: 3px;
}
.module-item__desc { font-size: 0.8rem; color: var(--text-muted); }

/* ============================================================
   Footer
   ============================================================ */
.footer {
    background: var(--surface-2);
    color: var(--text-secondary);
    padding: 24px var(--section-px);
    font-size: 0.78rem;
    border-top: 1px solid var(--border);
}
.footer__inner {
    max-width: var(--content-w); margin: 0 auto;
    display: flex; justify-content: space-between;
    align-items: center; flex-wrap: wrap; gap: 12px;
}
.footer__center { color: var(--text-muted); font-size: 0.74rem; }
.footer__center a { color: var(--text-secondary); }
.footer__center a:hover { color: var(--indigo); }
.footer a { color: var(--text-secondary); }
.footer a:hover { color: var(--indigo); }

/* ============================================================
   Utility
   ============================================================ */
.mt-0 { margin-top: 0; }   .mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); box-shadow: 8px 0 24px rgba(0,0,0,0.3); }
    .main-content { margin-left: 0; }
    .hamburger { display: block; }
    .hero { padding: 48px 24px 40px; }
    .hero__title { font-size: clamp(1.6rem, 4vw, 2.2rem); }
    .hero__project-desc { font-size: 1rem; }
}

@media (max-width: 640px) {
    .hero__title { font-size: 1.5rem; }
    .hero__project-desc { font-size: 0.9rem; }
    .hero__subtitle { font-size: 0.85rem; }
    .hero__actions { flex-direction: column; }
    .card-grid { grid-template-columns: 1fr; }
    .top-nav { padding: 0 14px; }
    .top-nav__brand span { display: none; }
    .github-link span { display: none; }
    .footer { padding: 20px 16px; }
    .footer__inner { flex-direction: column; text-align: center; }
    table { font-size: 0.78rem; }
    th, td { padding: 7px 10px; }
}

/* -- Sidebar overlay (mobile) -- */
.sidebar-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.5); z-index: 899;
}
.sidebar-overlay.show { display: block; }

/* -- Search highlight -- */
mark.search-hl {
    background: #fde68a;
    color: inherit;
    padding: 1px 2px;
    border-radius: 2px;
    box-shadow: 0 0 0 1px rgba(245,158,11,0.3);
}