/* ============================================================
   FoamSync DE — User Guide  |  style.css
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@300;400;600;700;900&family=JetBrains+Mono:wght@400;600&display=swap');

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #090a0c;
  --panel:       #0e0f12;
  --panel2:      #13141a;
  --border:      #1e2028;
  --border2:     #252630;
  --accent:      #e05010;
  --accent2:     #ff6830;
  --accent-dim:  #7a2a08;
  --text:        #c0c4d0;
  --text-dim:    #50546a;
  --text-off:    #282c38;
  --green:       #1aff88;
  --yellow:      #ffc820;
  --red:         #ff3030;
  --blue:        #20b0ff;
  --sidebar-w:   270px;
  --header-h:    56px;
  --radius:      6px;
  --font-main:   'Exo 2', 'Segoe UI', system-ui, sans-serif;
  --font-mono:   'JetBrains Mono', 'Consolas', monospace;
}

html { scroll-behavior: smooth; font-size: 15px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--panel); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

/* ── Header ───────────────────────────────────────────────── */
#header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--header-h);
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 24px; gap: 20px;
  z-index: 1000;
}

.logo {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none; flex-shrink: 0;
}
.logo-mark {
  width: 36px; height: 36px;
}
.logo-text {
  font-family: var(--font-main);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 4px;
  color: var(--accent2);
  line-height: 1;
}
.logo-sub {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--text-dim);
  font-weight: 600;
  display: block;
  margin-top: 2px;
}

.header-center {
  flex: 1;
  display: flex; justify-content: center;
}

#search-wrap {
  position: relative; width: 340px;
}
#search {
  width: 100%;
  background: var(--panel2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-main);
  font-size: 13px;
  padding: 7px 36px 7px 12px;
  outline: none;
  transition: border-color .15s;
}
#search:focus { border-color: var(--accent-dim); }
#search::placeholder { color: var(--text-dim); }
.search-icon {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  color: var(--text-dim); font-size: 14px; pointer-events: none;
}
#search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: var(--panel2); border: 1px solid var(--border2);
  border-radius: var(--radius); z-index: 200;
  max-height: 320px; overflow-y: auto;
  display: none;
}
#search-results.active { display: block; }
.sr-item {
  padding: 9px 14px; cursor: pointer; border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.sr-item:last-child { border-bottom: none; }
.sr-item:hover { background: var(--border); }
.sr-title { color: var(--accent2); font-weight: 600; font-size: 12px; }
.sr-snippet { color: var(--text-dim); font-size: 11px; margin-top: 2px; }

.header-right {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
}
.version-badge {
  font-size: 11px; color: var(--text-dim); letter-spacing: 1px;
  font-family: var(--font-mono);
}

/* ── Sidebar ──────────────────────────────────────────────── */
#sidebar {
  position: fixed;
  top: var(--header-h); left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 16px 0 32px;
  z-index: 900;
}

.nav-section {
  padding: 16px 20px 4px;
  font-size: 9px; font-weight: 700;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
}

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 20px 8px 20px;
  font-size: 13px; color: var(--text);
  cursor: pointer; text-decoration: none;
  border-left: 2px solid transparent;
  transition: background .1s, border-color .1s, color .1s;
  position: relative;
}
.nav-item:hover {
  background: var(--panel2);
  color: var(--accent2);
}
.nav-item.active {
  background: var(--panel2);
  border-left-color: var(--accent);
  color: var(--accent2);
}
.nav-item .nav-icon {
  width: 16px; text-align: center;
  font-size: 14px; flex-shrink: 0;
  opacity: .7;
}
.nav-item.active .nav-icon { opacity: 1; }

.nav-sub { padding-left: 36px; font-size: 12px; color: var(--text-dim); }
.nav-sub.active { color: var(--accent2); }
.nav-divider {
  height: 1px; background: var(--border);
  margin: 8px 16px;
}

/* ── Main content ─────────────────────────────────────────── */
#main {
  margin-left: var(--sidebar-w);
  margin-top: var(--header-h);
  padding: 40px 56px 80px;
  max-width: 960px;
}

/* ── Section pages ────────────────────────────────────────── */
.page { display: none; }
.page.active { display: block; }

/* ── Typography ───────────────────────────────────────────── */
.page-eyebrow {
  font-size: 10px; font-weight: 700; letter-spacing: 3px;
  color: var(--accent); text-transform: uppercase;
  margin-bottom: 8px;
}
h1 {
  font-size: 32px; font-weight: 900;
  color: #fff; letter-spacing: 1px;
  margin-bottom: 6px; line-height: 1.2;
}
.page-lead {
  font-size: 16px; color: var(--text-dim);
  max-width: 640px; margin-bottom: 36px;
  line-height: 1.7;
}
h2 {
  font-size: 20px; font-weight: 700; color: #fff;
  margin: 40px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
h3 {
  font-size: 15px; font-weight: 700;
  color: var(--accent2); margin: 24px 0 10px;
}
h4 {
  font-size: 13px; font-weight: 700;
  color: var(--text); margin: 18px 0 8px;
  text-transform: uppercase; letter-spacing: 1px;
}
p { margin-bottom: 14px; }
a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }
strong { color: #fff; font-weight: 600; }
code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--panel2);
  border: 1px solid var(--border2);
  border-radius: 3px;
  padding: 1px 6px;
  color: var(--green);
}

/* ── Callout boxes ────────────────────────────────────────── */
.callout {
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 20px 0;
  font-size: 13.5px;
  display: flex; gap: 12px; align-items: flex-start;
  border-left: 3px solid;
}
.callout-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.callout.tip    { background: #0d1f15; border-color: var(--green);  }
.callout.tip .callout-icon { color: var(--green); }
.callout.warn   { background: #1f1900; border-color: var(--yellow); }
.callout.warn .callout-icon { color: var(--yellow); }
.callout.info   { background: #0a1520; border-color: var(--blue);   }
.callout.info .callout-icon { color: var(--blue); }
.callout.danger { background: #1f0808; border-color: var(--red);    }
.callout.danger .callout-icon { color: var(--red); }

/* ── Parameter tables ─────────────────────────────────────── */
.param-table {
  width: 100%; border-collapse: collapse;
  margin: 16px 0 24px; font-size: 13px;
}
.param-table thead th {
  background: var(--panel2);
  padding: 9px 14px; text-align: left;
  font-size: 10px; font-weight: 700;
  letter-spacing: 2px; color: var(--text-dim);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border2);
}
.param-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background .1s;
}
.param-table tbody tr:hover { background: var(--panel2); }
.param-table td { padding: 10px 14px; vertical-align: top; }
.param-table td:first-child {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--accent2); font-weight: 600;
  white-space: nowrap;
}
.param-table td:nth-child(2) { color: var(--text-dim); font-size: 12px; white-space: nowrap; }
.param-table td:nth-child(3) { color: var(--text); }

/* ── Steps ────────────────────────────────────────────────── */
.steps { list-style: none; margin: 16px 0; }
.steps li {
  display: flex; gap: 16px;
  margin-bottom: 16px; align-items: flex-start;
}
.step-num {
  flex-shrink: 0;
  width: 28px; height: 28px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
  color: var(--accent2);
  margin-top: 1px;
}
.step-body { flex: 1; padding-top: 4px; }
.step-body strong { display: block; margin-bottom: 4px; color: #fff; }

/* ── UI Label chips ───────────────────────────────────────── */
.ui-label {
  display: inline-block;
  background: var(--panel2);
  border: 1px solid var(--border2);
  border-radius: 3px;
  padding: 1px 8px;
  font-size: 11px; font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent2);
  font-family: var(--font-mono);
}
.ui-label.green { color: var(--green); border-color: #0d3020; background: #0a1a10; }
.ui-label.orange { color: var(--accent); }
.ui-label.yellow { color: var(--yellow); border-color: #302800; background: #181200; }

/* ── Cards / feature grid ─────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px; margin: 20px 0;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  transition: border-color .15s;
  cursor: pointer;
}
.card:hover { border-color: var(--accent-dim); }
.card-icon { font-size: 24px; margin-bottom: 10px; }
.card-title { font-weight: 700; color: #fff; margin-bottom: 5px; font-size: 14px; }
.card-desc { font-size: 12px; color: var(--text-dim); line-height: 1.5; }

/* ── Breadcrumb ───────────────────────────────────────────── */
.breadcrumb {
  font-size: 11px; color: var(--text-dim);
  margin-bottom: 24px;
  display: flex; gap: 6px; align-items: center;
}
.breadcrumb span { color: var(--text-dim); }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent2); }

/* ── Keyboard shortcut ────────────────────────────────────── */
kbd {
  display: inline-block;
  background: var(--panel2);
  border: 1px solid var(--border2);
  border-bottom: 2px solid var(--border2);
  border-radius: 4px;
  padding: 1px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text);
}

/* ── Divider ──────────────────────────────────────────────── */
hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }

/* ── Hero on index ────────────────────────────────────────── */
.hero {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 40px 48px;
  margin-bottom: 40px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: 0; right: 0;
  width: 300px; height: 300px;
  background: radial-gradient(circle at top right, #7a2a0820, transparent 70%);
  pointer-events: none;
}
.hero-title {
  font-size: 38px; font-weight: 900;
  color: #fff; letter-spacing: 2px;
  margin-bottom: 4px;
}
.hero-title span { color: var(--accent2); }
.hero-sub {
  font-size: 13px; color: var(--text-dim);
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 18px;
}
.hero-desc {
  font-size: 15px; color: var(--text);
  max-width: 540px; line-height: 1.7;
  margin-bottom: 28px;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: 13px; font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer; text-decoration: none;
  transition: background .15s, border-color .15s;
  border: 1px solid;
}
.btn-primary {
  background: var(--accent); border-color: var(--accent2);
  color: #fff;
}
.btn-primary:hover { background: var(--accent2); text-decoration: none; }
.btn-ghost {
  background: transparent; border-color: var(--border2);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent-dim); color: var(--accent2); text-decoration: none; }

/* ── ASCII logo decorative ────────────────────────────────── */
.ascii-art {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-dim);
  line-height: 1.3;
  white-space: pre;
  margin: 0 0 20px;
}

/* ── Mobile ───────────────────────────────────────────────── */
#menu-toggle {
  display: none;
  background: none; border: none;
  color: var(--text); font-size: 20px;
  cursor: pointer; padding: 4px;
}

@media (max-width: 900px) {
  #menu-toggle { display: block; }
  #sidebar {
    transform: translateX(-100%);
    transition: transform .2s;
  }
  #sidebar.open { transform: translateX(0); }
  #main { margin-left: 0; padding: 24px 20px 60px; }
}