/* =========================================================================
   Proyecto AGUA - estilos del sitio estatico
   Tema "agua": azules/teal. Dark por defecto, light conmutado.
   Sin frameworks. CSS variables para theming.
   ========================================================================= */

:root {
  --bg: #0c1820;
  --bg-elev: #112432;
  --bg-elev2: #16303f;
  --border: #1f3d4f;
  --text: #dce9f0;
  --text-dim: #8fb0c0;
  --text-faint: #5e7d8d;
  --accent: #2bb6c9;
  --accent-2: #36d1a0;
  --accent-ink: #042027;
  --danger: #ff6b6b;
  --warn: #ffb454;
  --link: #4fd2e6;
  --code-bg: #0a1419;
  --shadow: 0 8px 30px rgba(0, 0, 0, .35);
  --radius: 14px;
  --maxw: 1320px;
  --sidebar-w: 290px;
  --topbar-h: 60px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body[data-theme="light"] {
  --bg: #f3f8fb;
  --bg-elev: #ffffff;
  --bg-elev2: #eaf3f7;
  --border: #d3e2ea;
  --text: #15323f;
  --text-dim: #4d6c7a;
  --text-faint: #7e98a4;
  --accent: #0e8fa3;
  --accent-2: #11a37a;
  --accent-ink: #ffffff;
  --link: #0c7c91;
  --code-bg: #eef5f8;
  --shadow: 0 8px 30px rgba(20, 60, 80, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------- Topbar ---------------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 12px;
  padding: 0 16px;
  background: color-mix(in srgb, var(--bg-elev) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { font-size: 26px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 16px; letter-spacing: .2px; }
.brand-text small { color: var(--text-dim); font-size: 11px; }
.topbar-spacer { flex: 1; }

.icon-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--text); border-radius: 10px; width: 38px; height: 38px;
  font-size: 17px; cursor: pointer; display: inline-grid; place-items: center;
}
.icon-btn:hover { background: var(--bg-elev2); }
#menuToggle { display: none; }

.search-wrap { position: relative; width: min(360px, 42vw); }
#search {
  width: 100%; height: 38px; padding: 0 12px;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px; font-size: 14px;
}
#search:focus { outline: 2px solid var(--accent); border-color: transparent; }
.search-results {
  position: absolute; top: 44px; left: 0; right: 0;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 12px; box-shadow: var(--shadow); overflow: hidden; max-height: 60vh; overflow-y: auto;
}
.search-results a {
  display: block; padding: 10px 14px; color: var(--text); border-bottom: 1px solid var(--border);
}
.search-results a:last-child { border-bottom: none; }
.search-results a:hover, .search-results a.active { background: var(--bg-elev2); text-decoration: none; }
.search-results .cat { color: var(--text-faint); font-size: 11px; display: block; }
.search-results .empty { padding: 14px; color: var(--text-dim); }

/* ---------------- Layout ---------------- */
.layout { display: flex; max-width: var(--maxw); margin: 0 auto; }

.sidebar {
  width: var(--sidebar-w); flex: 0 0 var(--sidebar-w);
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto; padding: 18px 12px 18px 18px;
  border-right: 1px solid var(--border);
}
.nav-cat { margin-bottom: 18px; }
.nav-cat-h {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; text-transform: uppercase; letter-spacing: .8px;
  color: var(--text-faint); margin: 4px 6px 8px;
}
.nav a {
  display: block; padding: 7px 10px; border-radius: 8px;
  color: var(--text-dim); font-size: 14px; margin: 1px 0;
}
.nav a:hover { background: var(--bg-elev2); color: var(--text); text-decoration: none; }
.nav a.active {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--text); font-weight: 600;
  box-shadow: inset 3px 0 0 var(--accent);
}
.sidebar-foot {
  margin-top: 10px; padding-top: 12px; border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 8px;
}
.sidebar-foot a { font-size: 13px; color: var(--accent-2); }
.genstamp { color: var(--text-faint); font-size: 11px; }

.scrim {
  position: fixed; inset: var(--topbar-h) 0 0 0; background: rgba(0,0,0,.5); z-index: 25;
}

/* ---------------- Main ---------------- */
.main {
  flex: 1; min-width: 0; padding: 28px clamp(16px, 4vw, 48px) 60px;
}

/* Hero / home */
.hero {
  background:
    radial-gradient(1200px 400px at 10% -20%, color-mix(in srgb, var(--accent) 22%, transparent), transparent),
    radial-gradient(900px 380px at 90% -10%, color-mix(in srgb, var(--accent-2) 18%, transparent), transparent),
    var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(24px, 5vw, 52px);
  box-shadow: var(--shadow);
}
.hero-badge {
  display: inline-block; font-size: 12px; letter-spacing: .5px;
  color: var(--accent-2); border: 1px solid var(--border);
  padding: 4px 10px; border-radius: 999px; margin-bottom: 16px;
}
.hero h1 { font-size: clamp(26px, 4.6vw, 44px); line-height: 1.1; margin: 0 0 14px; }
.hero-sub { font-size: clamp(15px, 2vw, 18px); color: var(--text-dim); max-width: 70ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }

.btn {
  display: inline-block; padding: 10px 18px; border-radius: 10px;
  border: 1px solid var(--border); color: var(--text); font-weight: 600; font-size: 14px;
  background: var(--bg-elev2); cursor: pointer;
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--accent-ink); border: none; }
.btn-ghost { background: transparent; }

.cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px; margin: 26px 0;
}
.card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; color: var(--text);
  transition: transform .12s ease, border-color .12s ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); text-decoration: none; }
.card-ic { font-size: 26px; }
.card h3 { margin: 8px 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--text-dim); font-size: 13.5px; }

.disclaimer {
  margin-top: 8px; padding: 14px 18px; border-radius: 12px;
  background: color-mix(in srgb, var(--warn) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--warn) 40%, var(--border));
  color: var(--text); font-size: 14px;
}

/* ---------------- Markdown ---------------- */
.markdown-body { max-width: 86ch; }
.markdown-body h1 { font-size: 30px; margin: 0 0 .5em; padding-bottom: .3em; border-bottom: 1px solid var(--border); }
.markdown-body h2 { font-size: 23px; margin: 1.6em 0 .5em; padding-bottom: .25em; border-bottom: 1px solid var(--border); }
.markdown-body h3 { font-size: 18px; margin: 1.4em 0 .4em; }
.markdown-body h4 { font-size: 15.5px; margin: 1.2em 0 .4em; color: var(--text-dim); }
.markdown-body p, .markdown-body li { font-size: 15px; }
.markdown-body a { color: var(--link); }
.markdown-body code {
  font-family: var(--mono); font-size: .9em;
  background: var(--code-bg); padding: .15em .4em; border-radius: 6px;
  border: 1px solid var(--border);
}
.markdown-body pre {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px; overflow-x: auto; line-height: 1.45;
}
.markdown-body pre code { background: none; border: none; padding: 0; font-size: 13px; }
.markdown-body blockquote {
  margin: 1em 0; padding: .4em 1em; color: var(--text-dim);
  border-left: 4px solid var(--accent); background: var(--bg-elev);
  border-radius: 0 10px 10px 0;
}
.markdown-body table {
  width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 13.5px;
  display: block; overflow-x: auto;
}
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 8px 11px; text-align: left; }
.markdown-body th { background: var(--bg-elev2); }
.markdown-body tr:nth-child(even) td { background: color-mix(in srgb, var(--bg-elev) 60%, transparent); }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 2em 0; }
.markdown-body img { max-width: 100%; border-radius: 10px; }
.markdown-body ul, .markdown-body ol { padding-left: 1.4em; }
.markdown-body li { margin: .25em 0; }

.doc-toolbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px dashed var(--border);
}
.doc-toolbar .crumb { color: var(--text-faint); font-size: 13px; }
.doc-toolbar .src { margin-left: auto; }
.doc-toolbar .src code { font-size: 12px; color: var(--text-dim); }

.main-foot {
  margin-top: 50px; padding-top: 18px; border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 4px;
  color: var(--text-faint); font-size: 12.5px;
}

.loading { color: var(--text-dim); padding: 30px 0; }
.error { color: var(--danger); padding: 30px 0; }

/* ---------------- Responsive ---------------- */
@media (max-width: 920px) {
  #menuToggle { display: inline-grid; }
  .sidebar {
    position: fixed; top: var(--topbar-h); left: 0; z-index: 30;
    background: var(--bg-elev); transform: translateX(-100%);
    transition: transform .2s ease; box-shadow: var(--shadow);
  }
  .sidebar.open { transform: translateX(0); }
  .brand-text small { display: none; }
  .search-wrap { width: 40vw; }
}
@media (max-width: 560px) {
  .search-wrap { display: none; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn { text-align: center; }
}