/* ══════════════════════════════════════════════════════════
   Morse-Pi Documentation — Shared Stylesheet
   Tab-based navigation · Widget homepage · Dark theme
   ══════════════════════════════════════════════════════════ */

/* ── Reset & Base ─────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
:root{
  --bg:#0b0e14;--bg2:#141821;--bg3:#1a1f2b;--bg4:#212738;
  --border:#2a3042;--border-glow:rgba(240,160,64,.25);
  --text:#e2e8f0;--text-dim:#8892a4;--text-bright:#f8fafc;
  --accent:#f0a040;--accent2:#e87030;--accent-glow:rgba(240,160,64,.15);
  --code-bg:#161b26;--link:#6cb4ff;--link-hover:#93ccff;
  --success:#4ade80;--warn:#fbbf24;--error:#f87171;
  --radius:10px;--radius-lg:16px;
  --shadow:0 4px 24px rgba(0,0,0,.4);--shadow-lg:0 8px 40px rgba(0,0,0,.5);
  --header-h:64px;--content-max:920px;
  --transition:all .25s cubic-bezier(.4,0,.2,1);
}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 70px);}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:15px;min-height:100vh;}
a{color:var(--link);text-decoration:none;transition:color .2s;}
a:hover{color:var(--link-hover);text-decoration:underline;}
::selection{background:rgba(240,160,64,.3);color:#fff;}

/* ── Header ───────────────────────────────────────────── */
.site-header{
  position:fixed;top:0;left:0;right:0;height:var(--header-h);
  background:linear-gradient(180deg,var(--bg2) 0%,rgba(20,24,33,.97) 100%);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;padding:0 28px;z-index:100;gap:20px;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.site-header .logo{font-size:1.4rem;font-weight:800;white-space:nowrap;letter-spacing:-.02em;}
.site-header .logo a{
  background:linear-gradient(135deg,#f0a040 0%,#e87030 50%,#ff6b35 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;text-decoration:none;
}
.site-header .logo a:hover{text-decoration:none;filter:brightness(1.15);}
.header-right{margin-left:auto;display:flex;gap:16px;align-items:center;font-size:.85rem;}
.header-right a{color:var(--text-dim);transition:var(--transition);}
.header-right a:hover{color:var(--accent);text-decoration:none;}

/* ── Tab Navigation ───────────────────────────────────── */
.tab-nav{
  position:fixed;top:var(--header-h);left:0;right:0;
  background:var(--bg2);border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  padding:0 28px;z-index:99;
  overflow-x:auto;gap:2px;height:46px;
  -webkit-overflow-scrolling:touch;
}
.tab-nav::-webkit-scrollbar{height:0;}
.tab-nav a{
  display:flex;align-items:center;gap:6px;
  padding:10px 18px;font-size:.88rem;font-weight:500;
  color:var(--text-dim);white-space:nowrap;
  border-bottom:2px solid transparent;
  transition:var(--transition);text-decoration:none;
  position:relative;
}
.tab-nav a:hover{color:var(--text);background:rgba(255,255,255,.04);text-decoration:none;}
.tab-nav a.active{
  color:var(--accent);border-bottom-color:var(--accent);
  background:rgba(240,160,64,.06);font-weight:600;
}
.tab-nav a .tab-icon{font-size:1rem;}

/* ── Page Layout ──────────────────────────────────────── */
.page-wrap{
  margin-top:calc(var(--header-h) + 46px);
  min-height:calc(100vh - var(--header-h) - 46px);
  display:flex;justify-content:center;
  padding:40px 32px 80px;
}
.page-wrap.has-sidebar{
  justify-content:flex-start;
  max-width:1180px;
  margin-left:auto;margin-right:auto;
  gap:0;
}
.content{width:100%;max-width:var(--content-max);}

/* ── Sidebar (subpage section nav) ────────────────────── */
.sidebar{
  position:sticky;top:calc(var(--header-h) + 46px + 28px);
  width:220px;min-width:220px;max-height:calc(100vh - var(--header-h) - 46px - 56px);
  overflow-y:auto;padding-right:28px;
  align-self:flex-start;
}
.sidebar-title{
  font-size:.7rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.1em;color:var(--text-dim);margin-bottom:14px;
  padding-bottom:8px;border-bottom:1px solid var(--border);
}
.sidebar-links{list-style:none;margin:0;padding:0;}
.sidebar-links li{margin-bottom:2px;}
.sidebar-links a{
  display:block;padding:7px 14px;font-size:.86rem;
  color:var(--text-dim);border-radius:6px;
  border-left:2px solid transparent;
  transition:var(--transition);text-decoration:none;
}
.sidebar-links a:hover{
  color:var(--text);background:rgba(255,255,255,.04);
  border-left-color:var(--border);text-decoration:none;
}
.sidebar-links a.active{
  color:var(--accent);background:var(--accent-glow);
  border-left-color:var(--accent);font-weight:600;
}

/* ── Typography ───────────────────────────────────────── */
h1{
  font-size:2.4rem;font-weight:800;margin-bottom:10px;letter-spacing:-.03em;
  background:linear-gradient(135deg,#f0a040 0%,#e87030 50%,#ff6b35 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
h2{
  font-size:1.55rem;font-weight:700;margin:52px 0 18px;padding-bottom:10px;
  border-bottom:1px solid var(--border);color:var(--text-bright);
}
h2:first-child,.content > section:first-child h2{margin-top:0;}
h3{font-size:1.15rem;font-weight:600;margin:30px 0 12px;color:var(--accent2);}
h4{font-size:1rem;font-weight:600;margin:22px 0 8px;color:var(--text-bright);}
p{margin-bottom:14px;}
.subtitle{color:var(--text-dim);font-size:1.05rem;margin-bottom:32px;line-height:1.6;}
ul,ol{margin:0 0 14px 22px;}li{margin-bottom:5px;}
strong{color:var(--text-bright);}
hr{border:none;border-top:1px solid var(--border);margin:36px 0;}

/* ── Code ─────────────────────────────────────────────── */
code{
  font-family:'Fira Code','JetBrains Mono','Cascadia Code',Consolas,monospace;
  font-size:.87em;background:var(--code-bg);padding:2px 7px;
  border-radius:5px;border:1px solid var(--border);
}
pre{
  background:var(--code-bg);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px 22px;
  overflow-x:auto;margin:0 0 18px;line-height:1.55;
  box-shadow:inset 0 2px 8px rgba(0,0,0,.2);
}
pre code{background:none;border:none;padding:0;font-size:.85rem;}

/* ── Tables ───────────────────────────────────────────── */
table{
  width:100%;border-collapse:collapse;margin:0 0 20px;font-size:.9rem;
  border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--border);
}
th{
  text-align:left;padding:11px 16px;background:var(--bg3);
  border:1px solid var(--border);font-weight:600;color:var(--accent);
  font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;
}
td{padding:9px 16px;border:1px solid var(--border);}
tr:nth-child(even) td{background:rgba(255,255,255,.02);}
tr:hover td{background:rgba(240,160,64,.04);}

/* ── Callouts ─────────────────────────────────────────── */
.callout{
  border-radius:var(--radius);padding:16px 20px;margin:16px 0 20px;
  border-left:4px solid;font-size:.9rem;
}
.callout.info{background:rgba(108,180,255,.08);border-color:var(--link);}
.callout.warn{background:rgba(251,191,36,.08);border-color:var(--warn);}
.callout.success{background:rgba(74,222,128,.08);border-color:var(--success);}
.callout.error{background:rgba(248,113,113,.08);border-color:var(--error);}
.callout .callout-title{font-weight:600;margin-bottom:6px;}

/* ── Badges ───────────────────────────────────────────── */
.badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.72rem;font-weight:600;letter-spacing:.04em;}
.badge.green{background:rgba(74,222,128,.15);color:var(--success);}
.badge.orange{background:rgba(240,160,64,.15);color:var(--accent);}
.badge.blue{background:rgba(108,180,255,.15);color:var(--link);}
.badge.red{background:rgba(248,113,113,.15);color:var(--error);}

/* ── Key / kbd ────────────────────────────────────────── */
kbd{
  display:inline-block;padding:2px 8px;font-size:.82em;font-family:inherit;
  background:var(--bg3);border:1px solid var(--border);
  border-radius:5px;box-shadow:0 2px 0 var(--border);color:var(--text);
}

/* ── Wiring diagram ───────────────────────────────────── */
.wiring-diagram{
  font-family:'Fira Code',Consolas,monospace;font-size:.82rem;line-height:1.4;
  white-space:pre;background:var(--code-bg);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px 22px;overflow-x:auto;margin:0 0 18px;
  box-shadow:inset 0 2px 8px rgba(0,0,0,.2);
}

/* ══════════════════════════════════════════════════════════
   HOMEPAGE — Hero & Widgets
   ══════════════════════════════════════════════════════════ */

/* ── Hero Section ─────────────────────────────────────── */
.hero{
  text-align:center;padding:60px 0 48px;
  position:relative;
}
.hero h1{font-size:3.2rem;margin-bottom:14px;letter-spacing:-.04em;}
.hero .hero-tagline{
  font-size:1.2rem;color:var(--text-dim);max-width:640px;margin:0 auto 12px;line-height:1.6;
}
.hero .morse-decoration{
  font-family:'Fira Code',Consolas,monospace;font-size:.95rem;
  color:var(--accent);opacity:.6;letter-spacing:.15em;margin-top:16px;
}
.hero::after{
  content:'';display:block;width:80px;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  border-radius:2px;margin:28px auto 0;
}

/* ── Widget Cards (homepage) ──────────────────────────── */
.widget-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:22px;margin:36px 0 48px;
}
.widget-card{
  display:flex;flex-direction:column;
  background:linear-gradient(145deg,var(--bg2) 0%,var(--bg3) 100%);
  border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:28px 26px;transition:var(--transition);text-decoration:none;
  position:relative;overflow:hidden;
}
.widget-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  opacity:0;transition:opacity .3s;
}
.widget-card:hover{
  border-color:var(--border-glow);transform:translateY(-4px);
  box-shadow:var(--shadow-lg),0 0 40px rgba(240,160,64,.08);
  text-decoration:none;
}
.widget-card:hover::before{opacity:1;}
.widget-card .wc-icon{
  font-size:2.2rem;margin-bottom:14px;
  filter:grayscale(.2);transition:filter .3s;
}
.widget-card:hover .wc-icon{filter:grayscale(0);}
.widget-card .wc-title{
  font-size:1.2rem;font-weight:700;color:var(--text-bright);margin-bottom:8px;
}
.widget-card .wc-desc{
  font-size:.88rem;color:var(--text-dim);line-height:1.55;flex:1;
}
.widget-card .wc-arrow{
  margin-top:16px;font-size:.82rem;font-weight:600;
  color:var(--accent);display:flex;align-items:center;gap:6px;
  opacity:0;transform:translateX(-8px);transition:var(--transition);
}
.widget-card:hover .wc-arrow{opacity:1;transform:translateX(0);}

/* ── Quick Install (homepage) ─────────────────────────── */
.quick-install{
  background:linear-gradient(145deg,var(--bg2) 0%,var(--bg3) 100%);
  border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px;margin:0 0 48px;
}
.quick-install h2{margin-top:0;border-bottom:none;padding-bottom:0;font-size:1.3rem;}
.quick-install pre{margin-top:14px;margin-bottom:12px;}

/* ── Feature Highlight Strip ──────────────────────────── */
.feature-strip{
  display:flex;flex-wrap:wrap;gap:16px;justify-content:center;
  margin:16px 0 40px;
}
.feature-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 18px;background:var(--bg3);border:1px solid var(--border);
  border-radius:24px;font-size:.85rem;color:var(--text-dim);
  transition:var(--transition);
}
.feature-pill:hover{border-color:var(--accent);color:var(--text);}
.feature-pill .fp-icon{font-size:1rem;}

/* ══════════════════════════════════════════════════════════
   SUBPAGE — Content Styles
   ══════════════════════════════════════════════════════════ */

/* ── Feature grid (used in getting-started) ───────────── */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:16px 0 24px;}
.feature-card{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px;transition:var(--transition);
}
.feature-card:hover{border-color:rgba(240,160,64,.2);transform:translateY(-2px);}
.feature-card .fc-title{font-weight:600;margin-bottom:6px;color:var(--text-bright);}
.feature-card .fc-desc{font-size:.85rem;color:var(--text-dim);line-height:1.5;}

/* ── Morse table grid ─────────────────────────────────── */
.morse-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));
  gap:6px;margin:12px 0 20px;
}
.morse-cell{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:8px;padding:10px 12px;text-align:center;
  font-family:'Fira Code',Consolas,monospace;font-size:.85rem;
  transition:var(--transition);
}
.morse-cell:hover{border-color:var(--accent);transform:scale(1.04);}
.morse-cell .mc-char{font-size:1.15rem;font-weight:700;color:var(--accent);}
.morse-cell .mc-code{color:var(--text-dim);font-size:.82rem;margin-top:3px;}

/* ── Back to top ──────────────────────────────────────── */
.back-top{
  position:fixed;bottom:28px;right:28px;width:44px;height:44px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#000;display:flex;align-items:center;justify-content:center;
  font-size:1.2rem;font-weight:700;cursor:pointer;
  opacity:0;pointer-events:none;transition:var(--transition);
  box-shadow:var(--shadow);z-index:80;text-decoration:none;
}
.back-top.visible{opacity:1;pointer-events:auto;}
.back-top:hover{transform:scale(1.1);text-decoration:none;}

/* ── Footer ───────────────────────────────────────────── */
.site-footer{
  text-align:center;color:var(--text-dim);font-size:.85rem;
  margin-top:48px;padding-top:32px;border-top:1px solid var(--border);
}
.site-footer a{color:var(--text-dim);}
.site-footer a:hover{color:var(--accent);}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════ */
@media(max-width:860px){
  .site-header{padding:0 16px;gap:12px;}
  .tab-nav{padding:0 12px;gap:0;justify-content:flex-start;}
  .tab-nav a{padding:10px 12px;font-size:.82rem;}
  .tab-nav a .tab-icon{display:none;}
  .page-wrap{padding:28px 16px 60px;}
  .sidebar{display:none;}
  .hero h1{font-size:2.2rem;}
  .hero .hero-tagline{font-size:1rem;}
  .widget-grid{grid-template-columns:1fr;}
  .feature-grid{grid-template-columns:1fr;}
  .feature-strip{flex-direction:column;align-items:stretch;}
  h1{font-size:2rem;}
  h2{font-size:1.3rem;}
}
@media(max-width:480px){
  .site-header .logo{font-size:1.2rem;}
  .header-right{gap:10px;font-size:.8rem;}
  .tab-nav a{padding:10px 10px;font-size:.78rem;}
  .hero h1{font-size:1.8rem;}
  .widget-card{padding:22px 20px;}
  .quick-install{padding:22px;}
}