/* =========================================================
   SnapchatPlanet.tech — stylesheet
   Design language: restrained cosmic reference guide.
   Light paper surfaces for reading, deep navy used only
   in the hero and a handful of accent bands.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600;9..144,700&family=Inter:wght@400;500;600;700&display=swap');

:root{
  /* Color tokens */
  --navy-950:#0B0F22;
  --navy-800:#141A36;
  --navy-700:#1D2547;
  --indigo-500:#4C5FD5;
  --indigo-400:#6C7CE0;
  --indigo-300:#9AA7F2;
  --amber-400:#F2A65A;
  --amber-500:#DE8B3B;
  --paper:#FAF9F6;
  --surface:#FFFFFF;
  --ink-900:#181C2E;
  --ink-700:#333A52;
  --ink-600:#565E78;
  --ink-400:#848DAA;
  --line:#E6E3DB;
  --line-strong:#D3CFC3;

  /* Type */
  --font-display:'Fraunces', Georgia, serif;
  --font-body:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Layout */
  --content-max:1180px;
  --prose-max:740px;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:22px;
  --shadow-soft:0 1px 2px rgba(20,20,40,.04), 0 8px 24px -12px rgba(20,20,40,.12);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important;}
}

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink-900);
  background:var(--paper);
  line-height:1.6;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;height:auto;display:block;}
a{color:var(--indigo-500);text-decoration-thickness:1.5px; text-underline-offset:3px;}
a:hover{color:var(--indigo-400);}
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:3px solid var(--amber-400);
  outline-offset:2px;
  border-radius:4px;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.18;
  color:var(--ink-900);
  margin:0 0 .5em;
}
h1{font-size:clamp(2rem, 5vw, 3rem);}
h2{font-size:clamp(1.5rem, 3.4vw, 2.15rem); margin-top:0;}
h3{font-size:1.3rem; font-weight:600;}
p{margin:0 0 1.1em;}
ul,ol{padding-left:1.3em;}
li{margin-bottom:.4em;}

.container{
  max-width:var(--content-max);
  margin:0 auto;
  padding:0 20px;
}
.prose{max-width:var(--prose-max);}

section{padding:64px 0;}
@media (max-width:640px){ section{padding:44px 0;} }

.section-eyebrow{
  display:inline-block;
  font-family:var(--font-body);
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--indigo-500);
  margin-bottom:.6em;
}

.section-intro{color:var(--ink-600); font-size:1.05rem; max-width:var(--prose-max);}

.visually-hidden{
  position:absolute !important;
  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:-999px;top:0;
  background:var(--navy-950);
  color:#fff;
  padding:12px 18px;
  z-index:1000;
  border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}

/* =========== Header / Nav =========== */
.site-header{
  position:sticky; top:0; z-index:90;
  background:rgba(250,249,246,.92);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-bar{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family:var(--font-display);
  font-weight:700; font-size:1.15rem;
  color:var(--ink-900); text-decoration:none;
}
.brand:hover{color:var(--ink-900);}
.brand-mark{
  width:30px;height:30px;flex:none;
}
.brand-mark svg{width:100%;height:100%;display:block;}

.main-nav{display:flex; align-items:center; gap:22px;}
.main-nav a{
  color:var(--ink-700); font-weight:600; font-size:.95rem;
  text-decoration:none; padding:6px 2px;
  border-bottom:2px solid transparent;
}
.main-nav a:hover{border-bottom-color:var(--indigo-400); color:var(--ink-900);}

.nav-toggle{
  display:none;
  background:none; border:1px solid var(--line-strong);
  border-radius:8px; padding:8px 10px; cursor:pointer;
}
.nav-toggle svg{display:block;}

@media (max-width:760px){
  .main-nav{
    position:absolute; top:100%; left:0; right:0;
    background:var(--surface);
    border-bottom:1px solid var(--line);
    flex-direction:column; align-items:flex-start;
    padding:6px 20px 18px;
    gap:4px;
    display:none;
  }
  .main-nav.is-open{display:flex;}
  .main-nav a{width:100%; padding:10px 0; border-bottom:1px solid var(--line);}
  .nav-toggle{display:inline-flex; align-items:center;}
}

/* =========== Hero =========== */
.hero{
  background:
    radial-gradient(ellipse at 18% 20%, rgba(140,160,255,.16), transparent 55%),
    radial-gradient(ellipse at 82% 78%, rgba(242,166,90,.12), transparent 50%),
    var(--navy-950);
  color:#EEF0FA;
  padding:72px 0 56px;
  position:relative;
  overflow:hidden;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:48px;
  align-items:center;
}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr; gap:32px;}
}
.hero h1{color:#fff; max-width:16ch;}
.hero-lede{
  font-size:1.15rem;
  color:#C7CCE6;
  max-width:52ch;
}
.hero-facts{
  list-style:none; padding:0; margin:26px 0 0;
  display:grid; gap:10px;
}
.hero-facts li{
  display:flex; gap:10px; align-items:flex-start;
  color:#DADEF2; font-size:.98rem; margin-bottom:0;
}
.hero-facts svg{flex:none; margin-top:3px; color:var(--amber-400);}
.hero-cta{
  margin-top:30px; display:flex; gap:14px; flex-wrap:wrap;
}
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-body); font-weight:700; font-size:.95rem;
  padding:12px 20px; border-radius:999px;
  text-decoration:none; border:1.5px solid transparent;
  cursor:pointer;
}
.btn-primary{background:var(--amber-400); color:var(--navy-950);}
.btn-primary:hover{background:var(--amber-500); color:var(--navy-950);}
.btn-ghost{background:transparent; color:#EEF0FA; border-color:rgba(238,240,250,.35);}
.btn-ghost:hover{border-color:#EEF0FA; color:#fff;}

/* Orbit rail — signature element: horizontal friendship-position ladder */
.orbit-rail{
  position:relative;
  background:var(--navy-800);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-lg);
  padding:26px 18px 20px;
}
.orbit-rail-title{
  font-size:.78rem; text-transform:uppercase; letter-spacing:.08em;
  color:var(--indigo-300); font-weight:700; margin-bottom:16px;
}
.orbit-track{
  position:relative;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.orbit-track::before{
  content:"";
  position:absolute; left:4%; right:4%; top:50%;
  height:2px; background:linear-gradient(90deg, var(--indigo-400), var(--amber-400));
  opacity:.55; transform:translateY(-50%);
}
.orbit-node{
  position:relative; z-index:1;
  display:flex; flex-direction:column; align-items:center; gap:6px;
  background:transparent; border:0; cursor:pointer;
  padding:4px;
}
.orbit-node img{width:26px; height:26px; border-radius:50%;}
.orbit-node span{
  font-size:.68rem; color:#B9C0DE; font-weight:600;
}
.orbit-node[aria-current="true"] img{
  outline:2px solid var(--amber-400); outline-offset:2px;
}
@media (max-width:600px){
  .orbit-node img{width:20px;height:20px;}
  .orbit-node span{display:none;}
}

/* =========== Table of contents =========== */
.toc-wrap{
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.toc{
  padding:14px 0;
}
.toc-toggle{
  display:none;
  width:100%;
  justify-content:space-between; align-items:center;
  background:var(--surface); border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:12px 14px; font-weight:700; font-family:var(--font-body);
  cursor:pointer; color:var(--ink-900);
}
.toc-list{
  list-style:none; margin:0; padding:0;
  display:flex; flex-wrap:wrap; gap:8px 4px;
}
.toc-list a{
  display:inline-block;
  font-size:.86rem; font-weight:600;
  color:var(--ink-700);
  background:var(--paper);
  border:1px solid var(--line);
  padding:7px 12px; border-radius:999px;
  text-decoration:none;
  white-space:nowrap;
}
.toc-list a:hover{border-color:var(--indigo-400); color:var(--indigo-500);}

@media (max-width:760px){
  .toc-toggle{display:flex;}
  .toc-list{display:none; overflow-x:visible; margin-top:12px;}
  .toc-list.is-open{display:flex;}
}

/* =========== Quick answer card =========== */
.quick-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
  padding:30px 26px;
}
.quick-order{
  display:flex; flex-wrap:wrap; align-items:center; gap:8px;
  font-family:var(--font-display); font-weight:700;
  font-size:clamp(1rem,2.6vw,1.35rem);
  margin:18px 0 22px;
}
.quick-order .arrow{color:var(--ink-400); font-weight:400;}
.quick-order .planet-name{
  display:inline-flex; align-items:center; gap:8px;
  background:var(--paper); border:1px solid var(--line);
  border-radius:999px; padding:6px 14px 6px 8px;
}
.quick-order img{width:22px; height:22px; border-radius:50%;}
.quick-list{
  display:grid; grid-template-columns:repeat(2,1fr);
  gap:10px 22px; list-style:none; margin:0; padding:0;
  font-size:.96rem; color:var(--ink-700);
}
.quick-list li{margin:0; display:flex; gap:8px;}
.quick-list b{color:var(--ink-900); min-width:1.4em;}
@media (max-width:560px){ .quick-list{grid-template-columns:1fr;} }

/* =========== Diagram =========== */
.diagram{
  display:flex; align-items:center; justify-content:center;
  gap:10px; flex-wrap:wrap;
  background:var(--paper);
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-md);
  padding:24px; margin:26px 0;
  font-weight:600; font-size:.95rem; color:var(--ink-700);
}
.diagram .step{
  background:var(--surface); border:1px solid var(--line);
  border-radius:var(--radius-sm); padding:10px 14px;
}
.diagram .sep{color:var(--indigo-500); font-size:1.1rem;}

/* =========== Table =========== */
.table-wrap{overflow-x:auto; border-radius:var(--radius-md); border:1px solid var(--line); margin:22px 0;}
table{
  width:100%; border-collapse:collapse; min-width:520px;
  background:var(--surface);
}
caption{text-align:left; padding:14px 16px 0; font-weight:600; color:var(--ink-600); font-size:.9rem;}
th,td{
  text-align:left; padding:13px 16px; border-bottom:1px solid var(--line);
  font-size:.95rem; vertical-align:top;
}
th{
  background:var(--paper); font-family:var(--font-body); font-weight:700;
  color:var(--ink-900); font-size:.82rem; text-transform:uppercase; letter-spacing:.03em;
}
tr:last-child td{border-bottom:0;}
td .planet-cell{display:flex; align-items:center; gap:10px; font-weight:700;}
td .planet-cell img{width:24px;height:24px;border-radius:50%;}

/* =========== Planet Explorer (interactive) =========== */
.explorer{
  background:var(--surface); border:1px solid var(--line);
  border-radius:var(--radius-lg); box-shadow:var(--shadow-soft);
  padding:8px; margin-top:26px;
}
.explorer-tabs{
  display:flex; flex-wrap:wrap; gap:6px; padding:14px;
  border-bottom:1px solid var(--line);
}
.explorer-tab{
  display:flex; align-items:center; gap:7px;
  background:var(--paper); border:1px solid var(--line);
  border-radius:999px; padding:7px 12px 7px 7px;
  font-weight:600; font-size:.86rem; color:var(--ink-700);
  cursor:pointer;
}
.explorer-tab img{width:20px;height:20px;border-radius:50%;}
.explorer-tab[aria-selected="true"]{
  background:var(--navy-950); color:#fff; border-color:var(--navy-950);
}
.explorer-panel{padding:24px;}
.explorer-panel-grid{
  display:grid; grid-template-columns:120px 1fr; gap:24px; align-items:start;
}
@media (max-width:560px){ .explorer-panel-grid{grid-template-columns:1fr; text-align:left;} }
.explorer-panel-grid img{width:100px;height:100px; margin:0 auto;}
.explorer-position{
  display:inline-block; font-weight:700; color:var(--indigo-500);
  font-size:.85rem; text-transform:uppercase; letter-spacing:.05em; margin-bottom:6px;
}
.explorer-misconception{
  margin-top:12px; padding:12px 14px;
  background:#FFF6E9; border:1px solid #F0DBB4; border-radius:var(--radius-sm);
  font-size:.9rem; color:#6B4B1E;
}
.noscript-note{
  font-size:.85rem; color:var(--ink-600); padding:14px 24px 0;
}

/* =========== Planet sections =========== */
.planet-section{
  border-top:1px solid var(--line);
}
.planet-section:nth-of-type(odd){background:var(--surface);}
.planet-card{
  display:grid; grid-template-columns:180px 1fr; gap:36px; align-items:start;
}
@media (max-width:700px){
  .planet-card{grid-template-columns:1fr; text-align:left;}
}
.planet-visual{
  display:flex; flex-direction:column; align-items:center; gap:12px;
  text-align:center;
}
.planet-visual img{width:140px; height:140px;}
.planet-badge{
  font-family:var(--font-body); font-weight:700; font-size:.78rem;
  color:#fff; background:var(--navy-950);
  padding:4px 12px; border-radius:999px; letter-spacing:.03em;
}
.planet-kicker{color:var(--indigo-500); font-weight:700; font-size:.85rem; text-transform:uppercase; letter-spacing:.05em; margin-bottom:6px;}
.planet-example{
  background:var(--paper); border-left:3px solid var(--indigo-400);
  padding:12px 16px; border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:.95rem; color:var(--ink-700); margin-top:14px;
}
.planet-example strong{color:var(--ink-900);}

/* =========== Comparison / callout blocks =========== */
.callout{
  background:var(--paper); border:1px solid var(--line);
  border-radius:var(--radius-md); padding:20px 22px; margin:18px 0;
}
.callout-warn{
  background:#FFF6E9; border-color:#F0DBB4;
}
.two-col{
  display:grid; grid-template-columns:1fr 1fr; gap:22px;
}
@media (max-width:700px){ .two-col{grid-template-columns:1fr;} }

/* =========== FAQ =========== */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  cursor:pointer; list-style:none;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
  padding:18px 4px; font-weight:700; font-family:var(--font-body);
  font-size:1rem; color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .icon{flex:none; transition:transform .18s ease;}
.faq-item[open] summary .icon{transform:rotate(45deg);}
.faq-item p{padding:0 4px 18px; color:var(--ink-700); max-width:70ch;}

/* =========== Ad slots =========== */
.ad-slot{
  max-width:var(--content-max); margin:34px auto; padding:0 20px;
}
.ad-slot-inner{
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-sm);
  min-height:90px;
  display:flex; align-items:center; justify-content:center;
  color:var(--ink-400); font-size:.78rem; letter-spacing:.05em; text-transform:uppercase;
}

/* =========== Source / author sections =========== */
.trust-band{background:var(--navy-950); color:#DDE1F2;}
.trust-band h2{color:#fff;}
.trust-band a{color:var(--indigo-300);}
.trust-grid{display:grid; grid-template-columns:1fr 1fr; gap:40px;}
@media (max-width:760px){ .trust-grid{grid-template-columns:1fr;} }
.trust-grid dt{font-weight:700; color:#fff; margin-top:16px;}
.trust-grid dt:first-child{margin-top:0;}
.trust-grid dd{margin:4px 0 0; color:#B9C0DE;}

/* =========== Footer =========== */
.site-footer{
  background:var(--navy-950); color:#B9C0DE; padding:48px 0 28px;
}
.footer-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:32px;
  padding-bottom:28px; border-bottom:1px solid rgba(255,255,255,.1);
}
@media (max-width:700px){ .footer-grid{grid-template-columns:1fr;} }
.footer-brand{display:flex; align-items:center; gap:10px; color:#fff; font-family:var(--font-display); font-weight:700; font-size:1.1rem; text-decoration:none;}
.footer-desc{margin-top:12px; color:#9AA3C4; font-size:.92rem; max-width:36ch;}
.footer-col h3{color:#fff; font-family:var(--font-body); font-size:.85rem; text-transform:uppercase; letter-spacing:.05em; margin-bottom:12px;}
.footer-col ul{list-style:none; padding:0; margin:0;}
.footer-col a{color:#B9C0DE; text-decoration:none; font-size:.94rem; display:inline-block; padding:5px 0;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  padding-top:22px; display:flex; flex-wrap:wrap; gap:12px;
  justify-content:space-between; font-size:.82rem; color:#8891B3;
}

/* Back to top */
.back-to-top{
  position:fixed; right:18px; bottom:18px; z-index:80;
  width:44px; height:44px; border-radius:50%;
  background:var(--navy-950); color:#fff; border:1px solid rgba(255,255,255,.15);
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; box-shadow:0 6px 18px rgba(11,15,34,.3);
  opacity:0; pointer-events:none; transition:opacity .2s ease;
}
.back-to-top.is-visible{opacity:1; pointer-events:auto;}

/* Utility */
.mt-0{margin-top:0;}
.text-muted{color:var(--ink-600);}
.small{font-size:.88rem;}

/* Legal pages */
.legal-body h2{margin-top:1.6em;}
.legal-body ul{margin-bottom:1.2em;}
.legal-meta{color:var(--ink-600); font-size:.9rem; margin-bottom:2em;}