/* ==========================================================================
   RedditSpreadsheet — Design tokens & base styles
   Original design system. Not derived from any other agent-site template.
   ========================================================================== */

:root{
  /* Dark theme, referencing reddit.com's near-black chrome / charcoal-card
     conventions: near-black page canvas, slightly-lighter charcoal cards,
     #343536-style hairline borders, #d7dadc/#818384-style text pair. */
  --coral:#FF5C4D;
  --coral-dark:#C8362C;
  --coral-tint:rgba(255,92,77,.16);
  --ink:#D7DADC;
  --canvas:#0B0C0E;
  --card:#1A1A1B;
  --muted:#818384;
  --border:#343536;
  --qc-green:#46D160;
  --qc-green-tint:rgba(70,209,96,.14);
  --dark:#030303;
  --amber:#FFB84D;
  --amber-tint:rgba(255,184,77,.14);
  --red-flag:#FF6B5E;

  --font-display:"Plus Jakarta Sans", "Manrope", "Inter Tight", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body:"Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --maxw:1240px;
  --read:800px;

  --radius-sm:10px;
  --radius:16px;
  --radius-lg:20px;

  --shadow-sm:0 1px 2px rgba(0,0,0,.3), 0 1px 1px rgba(0,0,0,.2);
  --shadow:0 4px 16px rgba(0,0,0,.4);

  --header-h:64px;
  --header-h-mobile:58px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--canvas);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  overflow-wrap:break-word;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em;overflow-wrap:break-word}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
table{border-collapse:collapse;width:100%}
button{font-family:inherit}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
@media (max-width:640px){.wrap{padding:0 18px}}

.eyebrow{
  font-family:var(--font-display);
  font-weight:700;
  font-size:12px;
  letter-spacing:.09em;
  text-transform:uppercase;
  color:var(--coral);
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-display);font-weight:700;font-size:15px;
  padding:13px 22px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .12s ease, box-shadow .12s ease, background .12s ease;
  max-width:100%;text-align:center;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--coral);color:#fff}
.btn-primary:hover{background:var(--coral-dark)}
.btn-secondary{background:var(--card);color:var(--ink);border-color:var(--border)}
.btn-secondary:hover{border-color:var(--ink)}
.btn-ghost{background:transparent;color:var(--ink);border-color:transparent;padding:13px 16px}
.btn-ghost:hover{background:rgba(255,255,255,.06)}
.btn-sm{padding:9px 16px;font-size:13px}

.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-display);font-weight:700;font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  padding:5px 10px;border-radius:999px;background:var(--coral-tint);color:var(--coral);
}
.tag-green{background:var(--qc-green-tint);color:var(--qc-green)}
.tag-neutral{background:rgba(255,255,255,.07);color:var(--muted)}
.tag-amber{background:var(--amber-tint);color:var(--amber)}

.section{padding:88px 0}
.section-tight{padding:56px 0}
@media (max-width:760px){
  .section{padding:56px 0}
  .section-tight{padding:40px 0}
}

.section-head{max-width:720px;margin:0 0 40px}
.section-head h2{font-size:clamp(24px,3vw,32px)}
.section-head p{color:var(--muted);font-size:17px}

.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
}

.hairline{height:1px;background:var(--border);border:0;margin:0}

.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.skip-link{
  position:absolute;left:12px;top:-48px;background:var(--coral);color:#fff;padding:10px 16px;border-radius:8px;
  z-index:1000;transition:top .15s ease;font-weight:700;font-size:14px;
}
.skip-link:focus{top:12px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,12,14,.85);
  backdrop-filter:saturate(180%) blur(10px);
  -webkit-backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--border);
  height:var(--header-h);
}
.header-row{
  height:var(--header-h);
  display:flex;align-items:center;gap:20px;
  max-width:var(--maxw);margin:0 auto;padding:0 20px;
}
.brand{display:flex;align-items:center;gap:9px;font-family:var(--font-display);font-weight:800;font-size:17px;color:var(--ink);flex:0 0 auto;margin-right:4px}
.brand svg{width:30px;height:30px;flex:0 0 auto}
.brand span{white-space:nowrap}

.main-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;min-width:0;overflow-x:auto;scrollbar-width:none}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{
  font-size:14.5px;font-weight:600;color:var(--ink);padding:9px 12px;border-radius:8px;white-space:nowrap;
}
.main-nav a:hover{background:rgba(255,255,255,.07)}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
.header-search{
  display:flex;align-items:center;gap:8px;
  background:var(--card);border:1px solid var(--border);border-radius:999px;
  padding:8px 8px 8px 14px;min-width:200px;
}
.header-search input{
  border:0;outline:0;font-size:14px;width:100%;min-width:0;background:transparent;color:var(--ink);
}
.header-search button{
  border:0;background:var(--coral);color:#fff;width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;cursor:pointer;flex:0 0 auto;
}
.lang-btn{
  display:flex;align-items:center;gap:6px;border:1px solid var(--border);background:var(--card);border-radius:999px;
  padding:8px 12px;font-size:13.5px;font-weight:700;color:var(--muted);
}
.lang-btn-static{cursor:default}
.mobile-lang-static{cursor:default;color:var(--muted)}
.lang-btn{cursor:pointer}
.lang-switcher{position:relative}
.lang-menu{
  position:absolute;top:calc(100% + 8px);right:0;min-width:170px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);
  box-shadow:var(--shadow);padding:6px;display:none;flex-direction:column;gap:2px;z-index:120;
}
.lang-menu.open{display:flex}
.lang-menu a{padding:9px 12px;border-radius:8px;font-size:13.5px;font-weight:600;color:var(--ink)}
.lang-menu a:hover{background:rgba(255,255,255,.06)}
.lang-menu a[aria-current="true"]{color:var(--coral)}
[dir="rtl"] .lang-menu{right:auto;left:0}
.spreadsheet-cta{
  background:var(--coral);color:#fff;font-family:var(--font-display);font-weight:800;font-size:14px;
  padding:11px 18px;border-radius:999px;white-space:nowrap;
}
.spreadsheet-cta:hover{background:var(--coral-dark)}

.mobile-only{display:none}
.desktop-only{display:flex}

@media (max-width:900px){
  .main-nav{display:none}
  .header-search{display:none}
  .header-row{gap:10px}
  .desktop-only{display:none}
  .mobile-only{display:flex}
}

.mobile-bar{
  display:none;
  align-items:center;justify-content:space-between;gap:8px;
  height:var(--header-h-mobile);
}
@media (max-width:900px){
  .site-header{height:var(--header-h-mobile)}
  .header-row{height:var(--header-h-mobile);padding:0 12px;gap:8px}
  .mobile-bar{display:flex;flex:1 1 auto;min-width:0;justify-content:space-between}
}
.mobile-bar{min-width:0}
.mobile-bar .brand{min-width:0;flex:0 1 auto;overflow:hidden}
.mobile-bar .brand span{display:inline-block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}
.mobile-actions{display:flex;align-items:center;gap:6px;flex:0 0 auto}
.mobile-icon-btn{
  width:34px;height:34px;border-radius:50%;border:1px solid var(--border);background:var(--card);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;padding:0;
}
.mobile-home{
  display:flex;align-items:center;gap:5px;font-size:12.5px;font-weight:700;color:var(--ink);
  border:1px solid var(--border);background:var(--card);border-radius:999px;padding:7px 10px;flex:0 0 auto;white-space:nowrap;
}
.mobile-spreadsheet{
  background:var(--coral);color:#fff;font-weight:800;font-size:12.5px;border-radius:999px;padding:7px 11px;flex:0 0 auto;white-space:nowrap;
}
@media (max-width:400px){
  .mobile-bar .brand span{display:none}
  .mobile-home{padding:7px 9px}
}
@media (max-width:360px){
  .mobile-home span{display:none}
  .mobile-home{padding:7px}
}

/* Hamburger drawer (secondary nav only; Home/Spreadsheet/Language never hidden here) */
.nav-drawer{
  position:fixed;inset:0;z-index:200;display:none;
}
.nav-drawer.open{display:block}
.nav-drawer-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.6)}
.nav-drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(320px,86vw);background:var(--card);
  padding:20px;overflow-y:auto;box-shadow:-8px 0 30px rgba(0,0,0,.5);
}
.nav-drawer-panel a{display:block;padding:12px 4px;font-weight:600;border-bottom:1px solid var(--border);font-size:15px}
.nav-drawer-close{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);background:var(--card);display:flex;align-items:center;justify-content:center;margin-bottom:12px}

/* ---------- Footer ---------- */
.site-footer{background:var(--dark);color:#D7D7D5;padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:44px}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;row-gap:32px}}
@media (max-width:480px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{display:flex;align-items:center;gap:9px;font-family:var(--font-display);font-weight:800;color:#fff;font-size:16px;margin-bottom:12px}
.footer-brand svg{width:26px;height:26px}
.footer-col h3{font-family:var(--font-display);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#8B8D91;margin-bottom:14px}
.footer-col a{display:block;color:#D7D7D5;font-size:14.5px;padding:5px 0}
.footer-col a:hover{color:#fff}
.footer-desc{color:#9A9C9F;font-size:14.5px;max-width:280px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#8B8D91;font-size:13px}
.footer-legal{max-width:640px}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13px;color:var(--muted);padding:18px 0 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{margin:0 6px;opacity:.5}

/* ---------- Utility article typography (used by simpler pages) ---------- */
.prose{max-width:var(--read)}
.prose h2{font-size:24px;margin-top:2em}
.prose h3{font-size:19px;margin-top:1.6em}
.prose p{color:#C4C6C8;font-size:16.5px}
.prose ul li,.prose ol li{color:#C4C6C8;font-size:16.5px;margin-bottom:.4em}
.prose strong{color:var(--ink)}
.prose table{margin:1.5em 0;font-size:15px}
.prose th,.prose td{border:1px solid var(--border);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:rgba(255,255,255,.05);font-family:var(--font-display);font-size:13px}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.5em 0}
.table-scroll table{margin:0;min-width:520px}

/* Focus visibility */
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--coral);outline-offset:2px}

/* ---------- Back to top ---------- */
.back-to-top{
  position:fixed;right:20px;bottom:24px;z-index:150;
  width:44px;height:44px;border-radius:50%;border:1px solid var(--border);
  background:var(--card);color:var(--ink);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:var(--shadow);transition:background .15s ease,border-color .15s ease;
}
.back-to-top:hover{border-color:var(--coral);color:var(--coral)}
.back-to-top[hidden]{display:none}
@media (max-width:640px){.back-to-top{right:14px;bottom:14px;width:40px;height:40px}}