/* ===== Mareya's Math Orbit — Stylesheet ===== */
:root{
  --ink:#0b1027;
  --ink-soft:#1a2150;
  --paper:#f6f1e7;
  --paper-warm:#efe6d2;
  --gold:#c9a14a;
  --gold-deep:#8a6a25;
  --accent:#3b4cca;
  --rule:#d8cdb4;
  --muted:#6b6655;
  --shadow: 0 30px 60px -30px rgba(11,16,39,.35);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Spectral", Georgia, serif;
  background:var(--paper);
  color:var(--ink);
  line-height:1.65;
  font-size:18px;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(ellipse 1200px 600px at 80% -10%, rgba(59,76,202,.08), transparent 60%),
    radial-gradient(ellipse 800px 400px at 0% 100%, rgba(201,161,74,.10), transparent 60%);
  background-attachment:fixed;
}

a{color:inherit;text-decoration:none}
.container{max-width:1120px;margin:0 auto;padding:0 32px}

/* ====== Header ====== */
.site-header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(140%) blur(10px);
  background:rgba(246,241,231,.85);
  border-bottom:1px solid var(--rule);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:18px 32px}
.brand{display:flex;align-items:center;gap:14px}
.brand-mark{
  width:44px;height:44px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%, #1d2a6e, #0b1027 70%);
  color:var(--gold);
  display:grid;place-items:center;
  font-family:"Fraunces", serif;font-weight:700;font-size:22px;
  box-shadow:0 6px 20px -8px rgba(11,16,39,.6), inset 0 0 0 1px rgba(201,161,74,.4);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:-6px;border-radius:50%;
  border:1px dashed rgba(11,16,39,.25);
  animation:spin 30s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-title{font-family:"Fraunces", serif;font-weight:600;font-size:20px;letter-spacing:-.01em}
.brand-sub{font-family:"Inter", sans-serif;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-top:2px}
.main-nav{display:flex;gap:28px;font-family:"Inter",sans-serif;font-size:14px;letter-spacing:.05em;text-transform:uppercase}
.main-nav a{color:var(--ink);opacity:.7;transition:opacity .2s}
.main-nav a:hover,.main-nav a.active{opacity:1;color:var(--accent)}

/* ====== Hero ====== */
.hero{padding:90px 0 60px;position:relative;overflow:hidden}

/* School photo hero banner */
.school-banner{
  position:relative;
  height:clamp(280px, 50vh, 480px);
  margin-bottom:0;
  overflow:hidden;
  background:#0b1027;
}
.school-banner img{
  width:100%;height:100%;object-fit:cover;
  display:block;
  filter:saturate(1.05) contrast(1.02);
}
.school-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,
    rgba(11,16,39,.15) 0%,
    rgba(11,16,39,0) 35%,
    rgba(246,241,231,.4) 85%,
    rgba(246,241,231,1) 100%);
  pointer-events:none;
}
.school-banner-overlay{
  position:absolute;inset:0;
  display:flex;align-items:flex-end;
  padding:0 0 56px;
  z-index:2;
}
.school-banner-overlay .container{width:100%}
.banner-eyebrow{
  font-family:"Inter",sans-serif;font-size:11px;letter-spacing:.3em;
  text-transform:uppercase;color:#fff;
  background:rgba(11,16,39,.55);
  backdrop-filter:blur(8px);
  display:inline-block;padding:8px 16px;border-radius:999px;
  border:1px solid rgba(255,255,255,.2);
  margin-bottom:18px;
}
.banner-title{
  font-family:"Fraunces",serif;font-weight:400;
  font-size:clamp(36px,6vw,68px);line-height:1.05;letter-spacing:-.02em;
  color:#fff;
  text-shadow:0 2px 24px rgba(11,16,39,.5);
  max-width:780px;
}
.banner-title em{font-style:italic;color:var(--gold);font-weight:300}
.banner-tagline{
  font-family:"Fraunces",serif;font-style:italic;
  font-size:clamp(18px,2.4vw,22px);
  color:#fff;opacity:.95;
  margin-top:14px;
  text-shadow:0 1px 12px rgba(11,16,39,.6);
}
@media(max-width:600px){
  .school-banner-overlay{padding-bottom:32px}
}
.eyebrow{
  font-family:"Inter",sans-serif;font-size:12px;letter-spacing:.3em;
  text-transform:uppercase;color:var(--gold-deep);margin-bottom:22px;
}
.hero-title{
  font-family:"Fraunces", serif;
  font-weight:400;
  font-size:clamp(44px,7vw,84px);
  line-height:1.02;letter-spacing:-.02em;
  color:var(--ink);
  max-width:920px;
}
.hero-title em{font-style:italic;color:var(--accent);font-weight:300}
.hero-tagline{
  font-family:"Fraunces",serif;font-style:italic;
  font-size:22px;color:var(--gold-deep);
  margin-top:18px;letter-spacing:.01em;
}
.hero-lede{margin-top:26px;max-width:640px;color:var(--ink-soft);font-size:19px}
.hero-equation{
  margin-top:48px;padding:28px 32px;
  background:linear-gradient(180deg, #fff8ea, #f6ecd0);
  border:1px solid var(--rule);border-radius:6px;
  display:inline-block;box-shadow:var(--shadow);
}

/* ====== Sections ====== */
.section-title{
  font-family:"Fraunces",serif;font-weight:500;
  font-size:36px;letter-spacing:-.01em;
  margin-bottom:32px;
  display:flex;align-items:center;gap:18px;
}
.section-title::before{
  content:"";width:36px;height:1px;background:var(--gold);
}

/* Chapters list (homepage) */
.chapters-section{padding:80px 0}
.chapter-list{display:grid;gap:0;border-top:1px solid var(--rule)}
.chapter-row{
  display:grid;grid-template-columns:80px 1fr auto;gap:24px;align-items:center;
  padding:28px 4px;border-bottom:1px solid var(--rule);
  transition:background .25s, padding .25s;
  position:relative;
}
.chapter-row:hover{background:rgba(255,255,255,.5);padding-left:16px}
.chapter-row.available{cursor:pointer}
.chapter-row.locked{opacity:.5}
.chapter-num{
  font-family:"Fraunces",serif;font-size:42px;font-weight:300;
  color:var(--gold-deep);font-feature-settings:"lnum";
}
.chapter-info h3{
  font-family:"Fraunces",serif;font-weight:500;font-size:24px;
  letter-spacing:-.01em;margin-bottom:6px;
}
.chapter-info p{color:var(--muted);font-size:15px}
.chapter-arrow{
  font-family:"Inter",sans-serif;font-size:14px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--accent);font-weight:500;
}
.chapter-row.locked .chapter-arrow{color:var(--muted)}

/* ====== Chapter page ====== */
.crumb{
  font-family:"Inter",sans-serif;font-size:12px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted);padding:24px 0;
}
.crumb a{color:var(--accent)}
.chapter-hero{padding:24px 0 60px;border-bottom:1px solid var(--rule)}
.chapter-label{font-family:"Inter",sans-serif;font-size:13px;letter-spacing:.25em;text-transform:uppercase;color:var(--gold-deep)}
.chapter-title{
  font-family:"Fraunces",serif;font-weight:400;
  font-size:clamp(40px,6vw,68px);line-height:1.05;letter-spacing:-.02em;
  margin:14px 0 22px;
}
.chapter-intro{max-width:680px;color:var(--ink-soft);font-size:19px}

.toc{padding:60px 0}
.toc-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
@media(max-width:760px){.toc-grid{grid-template-columns:1fr}}
.toc-card{
  background:#fff;border:1px solid var(--rule);border-radius:6px;
  padding:28px;transition:transform .25s, box-shadow .25s;
}
.toc-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.toc-card h4{font-family:"Fraunces",serif;font-size:20px;font-weight:500;margin-bottom:10px}
.toc-card .lesson-num{font-family:"Inter",sans-serif;font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold-deep);margin-bottom:8px;display:block}
.toc-card p{color:var(--muted);font-size:15px;margin-bottom:14px}
.toc-card .open{font-family:"Inter",sans-serif;font-size:13px;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);font-weight:500}

/* Exercises picker */
.exercise-section{padding:60px 0;border-top:1px solid var(--rule)}
.exercise-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:14px;margin-top:24px}
.ex-btn{
  display:block;padding:18px 12px;text-align:center;
  background:#fff;border:1px solid var(--rule);border-radius:6px;
  font-family:"Fraunces",serif;font-size:18px;font-weight:500;
  transition:all .2s;
}
.ex-btn:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px);border-color:var(--ink)}
.ex-btn small{display:block;font-family:"Inter",sans-serif;font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);font-weight:400;margin-top:4px}
.ex-btn:hover small{color:var(--gold)}

/* ====== Lesson / Exercise pages ====== */
.content-wrap{padding:60px 0 100px;max-width:780px;margin:0 auto}
.content-wrap h1{font-family:"Fraunces",serif;font-weight:400;font-size:clamp(34px,5vw,52px);letter-spacing:-.02em;line-height:1.1;margin-bottom:14px}
.content-wrap h2{font-family:"Fraunces",serif;font-weight:500;font-size:28px;margin:48px 0 16px;letter-spacing:-.01em}
.content-wrap h3{font-family:"Fraunces",serif;font-weight:500;font-size:21px;margin:32px 0 12px;color:var(--ink-soft)}
.content-wrap p{margin-bottom:18px;color:var(--ink-soft)}
.content-wrap ul,.content-wrap ol{margin:0 0 22px 22px;color:var(--ink-soft)}
.content-wrap li{margin-bottom:8px}
.content-wrap strong{color:var(--ink)}

.callout{
  border-left:3px solid var(--gold);
  background:linear-gradient(90deg, rgba(201,161,74,.08), transparent 80%);
  padding:18px 22px;border-radius:0 6px 6px 0;margin:24px 0;
}
.callout.formula{border-color:var(--accent);background:linear-gradient(90deg, rgba(59,76,202,.07), transparent 80%)}
.callout-label{font-family:"Inter",sans-serif;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold-deep);margin-bottom:8px;display:block;font-weight:600}
.callout.formula .callout-label{color:var(--accent)}

.step{
  display:grid;grid-template-columns:48px 1fr;gap:18px;align-items:start;
  margin:22px 0;padding:18px 22px;background:#fff;border:1px solid var(--rule);border-radius:6px;
}
.step-num{
  width:36px;height:36px;border-radius:50%;
  background:var(--ink);color:var(--gold);
  display:grid;place-items:center;font-family:"Fraunces",serif;font-weight:600;font-size:16px;
}
.step-body p:last-child{margin-bottom:0}

.exercise-prompt{
  background:var(--ink);color:var(--paper);
  padding:32px 36px;border-radius:8px;margin:24px 0 36px;
  box-shadow:var(--shadow);
}
.exercise-prompt .label{font-family:"Inter",sans-serif;font-size:11px;letter-spacing:.25em;text-transform:uppercase;color:var(--gold);margin-bottom:10px;display:block}
.exercise-prompt p{color:var(--paper);font-size:20px;margin:0}

.nav-back{
  display:inline-flex;align-items:center;gap:8px;
  font-family:"Inter",sans-serif;font-size:13px;letter-spacing:.15em;text-transform:uppercase;
  color:var(--accent);margin-top:40px;
}

/* ====== Footer ====== */
.site-footer{
  border-top:1px solid var(--rule);padding:40px 0;margin-top:60px;
  background:rgba(255,255,255,.4);
}
.footer-inner{text-align:center;color:var(--muted);font-size:14px}
.footer-sub{margin-top:6px;font-style:italic;font-size:13px}

/* ====== Resource Selection Grid ====== */
.resource-hub{
  max-width:1100px;margin:50px auto 80px;padding:0 24px;
}
.resource-hub-header{
  margin-bottom:36px;
}
.resource-hub-header .lesson-tag{
  font-family:"Inter",sans-serif;font-size:12px;letter-spacing:.25em;
  text-transform:uppercase;color:var(--gold-deep);
}
.resource-hub-header h1{
  font-family:"Fraunces",serif;font-weight:400;
  font-size:clamp(32px,5vw,48px);line-height:1.1;letter-spacing:-.02em;
  margin:10px 0 12px;
}
.resource-hub-header .lesson-meta{
  color:var(--muted);font-size:15px;font-style:italic;
}
.resource-hub-prompt{
  font-family:"Inter",sans-serif;font-size:13px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--accent);font-weight:500;
  margin:32px 0 18px;display:flex;align-items:center;gap:14px;
}
.resource-hub-prompt::before{
  content:"";flex:0 0 36px;height:1px;background:var(--accent);
}

.resource-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(220px, 1fr));
  gap:20px;
}
.resource-tile{
  display:flex;flex-direction:column;justify-content:space-between;
  background:#fff;
  color:var(--ink);
  border-radius:16px;
  padding:24px 22px 22px;
  text-align:left;
  border:1px solid var(--rule);
  position:relative;overflow:hidden;
  transition:transform .25s cubic-bezier(.2,.9,.3,1.4), box-shadow .25s, border-color .25s;
  min-height:200px;
  box-shadow:0 2px 6px -2px rgba(11,16,39,.08);
}
.resource-tile:hover{
  transform:translateY(-6px);
  box-shadow:0 24px 40px -16px rgba(11,16,39,.25);
  border-color:var(--accent);
}
.resource-tile.disabled{
  background:linear-gradient(160deg, #faf6ec 0%, #efe6d2 100%);
  color:var(--muted);
  pointer-events:none;
  cursor:not-allowed;
  opacity:.75;
}

/* The big colorful emoji icon, sitting in a soft tinted square */
.tile-icon{
  width:64px;height:64px;
  display:grid;place-items:center;
  border-radius:14px;margin-bottom:18px;
  font-size:36px;line-height:1;
  /* This subtle pastel background is set per-tile via accent color */
  background:var(--tile-bg, #eef0fb);
  position:relative;
  transition:transform .3s;
}
.resource-tile:hover .tile-icon{
  transform:scale(1.08) rotate(-3deg);
}
.resource-tile.disabled .tile-icon{
  filter:grayscale(.3);
  background:rgba(255,255,255,.5);
}

.tile-label{
  font-family:"Inter",sans-serif;font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--accent);font-weight:600;
  margin-bottom:4px;
}
.resource-tile.disabled .tile-label{color:var(--muted)}

.tile-title{
  font-family:"Fraunces",serif;font-weight:500;
  font-size:21px;letter-spacing:-.01em;line-height:1.2;
  margin-bottom:12px;color:var(--ink);
}
.resource-tile.disabled .tile-title{color:var(--muted)}

.tile-action{
  font-family:"Inter",sans-serif;font-size:12px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--accent);font-weight:600;
  display:flex;align-items:center;gap:8px;
  margin-top:auto;
}
.resource-tile.disabled .tile-action{color:var(--muted)}
.tile-action::after{
  content:"→";font-size:16px;transition:transform .25s;
}
.resource-tile:hover .tile-action::after{transform:translateX(5px)}
.resource-tile.disabled .tile-action::after{content:""}

/* Per-tile pastel backgrounds for variety */
.tile-powerpoint .tile-icon{background:#fff4e0}    /* warm orange */
.tile-textbook .tile-icon{background:#e6ecff}      /* soft blue */
.tile-solutions .tile-icon{background:#e2f5e8}     /* soft green */
.tile-mcq .tile-icon{background:#f3e8ff}           /* soft purple */
.tile-frq .tile-icon{background:#dff3f6}           /* soft teal */
.tile-eot .tile-icon{background:#fde4e4}           /* soft pink */
.tile-misc .tile-icon{background:#fef3c7}          /* soft yellow */
.tile-term .tile-icon{background:#fde4e4}          /* terms inherit pink */
.pdf-lesson-wrap{
  max-width:1100px;margin:40px auto 80px;padding:0 24px;
}
.pdf-lesson-header{
  margin-bottom:28px;
}
.pdf-lesson-header .lesson-tag{
  font-family:"Inter",sans-serif;font-size:12px;letter-spacing:.25em;
  text-transform:uppercase;color:var(--gold-deep);
}
.pdf-lesson-header h1{
  font-family:"Fraunces",serif;font-weight:400;
  font-size:clamp(32px,5vw,48px);line-height:1.1;letter-spacing:-.02em;
  margin:10px 0 12px;
}
.pdf-lesson-header .lesson-meta{
  color:var(--muted);font-size:15px;font-style:italic;
}
.pdf-frame-wrap{
  position:relative;
  background:#222;
  border:1px solid var(--rule);
  border-radius:8px;
  overflow:hidden;
  box-shadow:var(--shadow);
  /* aspect ratio for slides ~16:9 */
  aspect-ratio: 16 / 9;
  /* prevent right-click via overlay element below */
}
.pdf-frame-wrap iframe{
  position:absolute;inset:0;
  width:100%;height:100%;
  border:0;
  background:#fff;
}
.pdf-protect-overlay{
  position:absolute;top:0;right:0;
  width:46px;height:46px;
  background:transparent;
  /* covers the download/print buttons in PDF viewer top-right */
  z-index:5;
}
.pdf-instructions{
  margin-top:18px;color:var(--muted);font-size:14px;text-align:center;font-style:italic;
}
@media (max-width: 700px){
  .pdf-frame-wrap{aspect-ratio: 4 / 3;}
}