/* ============================================================
   Excel Tutors — Production stylesheet (plain CSS, responsive)
   ============================================================ */

/* Body fonts via Fontshare CDN */
@import url("https://api.fontshare.com/v2/css?f[]=switzer@400,500,600,700&display=swap");
@import url("https://api.fontshare.com/v2/css?f[]=general-sans@400,500,600&display=swap");

/* Display font self-hosted */
@font-face { font-family:"Fraunces"; src:url("assets/fonts/Fraunces_72pt-Regular.ttf") format("truetype"); font-weight:400; font-display:swap; }
@font-face { font-family:"Fraunces"; src:url("assets/fonts/Fraunces_72pt-SemiBold.ttf") format("truetype"); font-weight:600; font-display:swap; }
@font-face { font-family:"Fraunces"; src:url("assets/fonts/Fraunces_72pt-Bold.ttf") format("truetype"); font-weight:700; font-display:swap; }

:root{
  --blue-700:#112F99; --gold-400:#F0D430; --white:#FFFFFF;
  --blue-900:#0A1A4D; --blue-800:#0E2470; --blue-600:#1C3FB8; --blue-200:#B9C4EC; --blue-100:#E4E9F8;
  --gold-600:#C9AE12; --gold-500:#DEC11D; --gold-200:#F8EBA0; --gold-100:#FCF6D6;
  --paper:#FBF6EA; --paper-2:#F4ECD9; --ink-900:#161427; --ink-700:#3A3852; --ink-500:#6B6981; --line:#E6DCC6;

  --font-display:"Fraunces",Georgia,serif;
  --font-body:"Switzer","Inter",system-ui,sans-serif;
  --font-ui:"General Sans","Switzer",system-ui,sans-serif;

  --r-md:14px; --r-lg:22px; --r-xl:32px; --r-pill:999px;
  --shadow-sm:0 1px 2px rgba(22,20,39,.06),0 2px 6px rgba(22,20,39,.05);
  --shadow-md:0 6px 18px rgba(17,47,153,.10),0 2px 6px rgba(22,20,39,.06);
  --shadow-lg:0 18px 48px rgba(17,47,153,.16),0 6px 16px rgba(22,20,39,.08);
  --shadow-gold:0 8px 24px rgba(240,212,48,.35);
  --ease-soft:cubic-bezier(.22,1,.36,1);
  --container:1200px; --narrow:760px; --section-y:112px; --gutter:40px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--paper);font-family:var(--font-body);color:var(--ink-700);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;}
img{display:block;max-width:100%;}
a{color:inherit;}
h1,h2,h3{font-family:var(--font-display);color:var(--ink-900);letter-spacing:-.02em;margin:0;}

.container{max-width:var(--container);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter);}
.section{padding-top:var(--section-y);padding-bottom:var(--section-y);}

/* ---- Eyebrow ---- */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-ui);font-weight:600;
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--blue-700);}
.eyebrow::before{content:"\2726";color:var(--gold-400);font-size:12px;}
.eyebrow.on-blue{color:var(--gold-400);}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:var(--font-ui);
  font-weight:600;letter-spacing:.01em;border-radius:var(--r-pill);cursor:pointer;text-decoration:none;
  line-height:1;border:1px solid transparent;padding:13px 26px;font-size:15px;
  transition:transform .16s var(--ease-soft),filter .16s var(--ease-soft),box-shadow .28s var(--ease-soft);}
.btn-lg{padding:17px 34px;font-size:17px;}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{background:var(--gold-400);color:var(--ink-900);border-color:var(--gold-400);box-shadow:var(--shadow-gold);}
.btn-whatsapp{background:var(--blue-700);color:var(--white);border-color:var(--blue-700);}
.btn-secondary{background:transparent;color:var(--blue-700);border:1.5px solid var(--blue-700);}
.btn-on-photo{background:rgba(255,255,255,.10);color:var(--white);border:1.5px solid rgba(255,255,255,.4);}
.btn:hover{filter:brightness(1.04);}
.btn:active{transform:scale(.97);}

/* ---- Nav ---- */
.nav{position:sticky;top:0;z-index:60;display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--gutter);transition:padding .28s var(--ease-soft),background .28s var(--ease-soft),border-color .28s var(--ease-soft);
  border-bottom:1px solid transparent;}
.nav.scrolled{padding:12px var(--gutter);background:rgba(10,26,77,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);}
.brand{display:flex;align-items:center;gap:12px;}
.brand img{height:40px;width:40px;border-radius:8px;}
.brand span{font-family:var(--font-display);font-weight:600;font-size:20px;color:var(--white);letter-spacing:.02em;}
.nav-links{display:flex;align-items:center;gap:30px;}
.nav-links a{font-family:var(--font-ui);font-size:15px;font-weight:500;color:rgba(255,255,255,.82);text-decoration:none;}
.nav-links a:hover{color:var(--white);}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;flex-direction:column;gap:5px;}
.nav-toggle span{display:block;width:26px;height:2px;background:var(--white);transition:transform .28s var(--ease-soft),opacity .2s;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---- Hero ---- */
.hero{position:relative;min-height:92vh;margin-top:-92px;padding-top:92px;display:flex;align-items:center;overflow:hidden;}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.hero-scrim{position:absolute;inset:0;background:linear-gradient(115deg,rgba(10,26,77,.92) 0%,rgba(17,47,153,.78) 48%,rgba(10,26,77,.66) 100%);}
.hero .container{position:relative;width:100%;padding-top:48px;padding-bottom:48px;}
.hero h1{font-weight:600;font-size:clamp(40px,6vw,76px);line-height:1.04;color:var(--white);margin:20px 0 0;max-width:16ch;min-height:2.1em;}
.caret{color:var(--gold-400);font-weight:400;}
.hero p{font-size:clamp(17px,2.2vw,20px);line-height:1.6;color:rgba(255,255,255,.86);margin:26px 0 0;max-width:46ch;}
.cta-row{display:flex;gap:16px;margin-top:38px;flex-wrap:wrap;}

/* ---- Headings ---- */
.h-section{font-weight:600;font-size:clamp(30px,4vw,52px);line-height:1.1;margin-top:16px;}
.lead{font-size:clamp(16px,2vw,19px);line-height:1.6;color:var(--ink-700);}
.center{text-align:center;display:flex;flex-direction:column;align-items:center;}

/* ---- Approach ---- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.card{background:var(--white);border-radius:var(--r-lg);padding:32px;box-shadow:var(--shadow-sm);border:1px solid var(--line);}
.card .num{font-family:var(--font-display);font-style:italic;font-size:34px;color:var(--gold-500);}
.card h3{font-weight:600;font-size:23px;margin:14px 0 10px;}
.card p{font-size:16px;line-height:1.65;color:var(--ink-700);margin:0;}

/* ---- Subjects (arch cards) ---- */
.subjects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:44px;margin-top:60px;}
.arch{display:flex;flex-direction:column;align-items:center;text-align:center;text-decoration:none;
  transition:transform .28s var(--ease-soft);}
.arch:hover{transform:translateY(-6px);}
.arch .frame{width:100%;aspect-ratio:3/4;border-radius:999px 999px var(--r-md) var(--r-md);overflow:hidden;
  box-shadow:var(--shadow-md);border:1px solid var(--line);background:var(--blue-100);}
.arch.gold .frame{border:2px solid var(--gold-400);}
.arch .frame img{width:100%;height:100%;object-fit:cover;}
.arch .level{margin-top:20px;font-family:var(--font-ui);font-weight:600;font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--blue-700);}
.arch h3{font-weight:600;font-size:26px;margin:8px 0 0;}
.arch p{font-size:15px;line-height:1.6;color:var(--ink-700);margin:10px 0 0;max-width:30ch;}

/* ---- Mentor ---- */
.section-blue{background:var(--blue-900);}
.mentor-grid{display:grid;grid-template-columns:minmax(280px,.8fr) 1.2fr;gap:72px;align-items:center;}
.ornate{position:relative;padding:8px;border:2px solid var(--gold-400);border-radius:3px;display:inline-block;}
.ornate::before{content:"";position:absolute;inset:8px;border:1px solid rgba(240,212,48,.5);border-radius:2px;pointer-events:none;}
.ornate .star{position:absolute;color:var(--gold-400);font-size:16px;line-height:1;}
.ornate .star.tl{top:-9px;left:-8px;} .ornate .star.tr{top:-9px;right:-8px;}
.ornate .star.bl{bottom:-9px;left:-8px;} .ornate .star.br{bottom:-9px;right:-8px;}
.ornate .star.tc{top:-10px;left:50%;transform:translateX(-50%);font-size:13px;}
.ornate .star.bc{bottom:-10px;left:50%;transform:translateX(-50%);font-size:13px;}
.ornate .inner{position:relative;border-radius:1px;overflow:hidden;}
.ornate img{width:300px;max-width:100%;display:block;}
.mentor-grid h2{color:var(--white);font-weight:600;font-size:clamp(32px,4.4vw,58px);line-height:1.05;margin:18px 0 6px;}
.mentor-role{font-family:var(--font-ui);font-size:15px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--gold-400);margin:0 0 24px;}
.mentor-grid p.bio{font-size:clamp(17px,2.2vw,20px);line-height:1.65;color:rgba(255,255,255,.86);margin:0;max-width:44ch;}

/* ---- Resources (PDF viewers) ---- */
.section-paper2{background:var(--paper-2);}
.flip{background:var(--white);border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--shadow-md);overflow:hidden;}
.flip .cover{position:relative;height:280px;background:var(--ink-900);display:flex;align-items:center;justify-content:center;overflow:hidden;}
.pdf-canvas{display:none;max-width:100%;max-height:100%;}
.pdf-controls{position:absolute;bottom:0;left:0;right:0;display:none;align-items:center;justify-content:space-between;
  padding:10px 16px;background:linear-gradient(to top,rgba(10,26,77,.9) 0%,transparent 100%);}
.pdf-btn{background:rgba(255,255,255,.15);border:1.5px solid rgba(255,255,255,.3);color:var(--white);
  border-radius:var(--r-pill);width:34px;height:34px;cursor:pointer;font-size:24px;line-height:1;padding:0;
  display:flex;align-items:center;justify-content:center;transition:background .15s;}
.pdf-btn:hover:not(:disabled){background:rgba(255,255,255,.28);}
.pdf-btn:disabled{opacity:0.3;cursor:default;}
.pdf-count{font-family:var(--font-ui);font-size:13px;font-weight:600;color:rgba(255,255,255,.9);letter-spacing:.04em;}
.pdf-loading{font-family:var(--font-ui);font-size:13px;color:rgba(255,255,255,.4);}
.flip .meta{padding:22px 24px;}
.flip .meta h3{font-weight:600;font-size:21px;}
.flip .meta p{font-size:14px;color:var(--ink-500);margin:6px 0 16px;}

/* ---- Success stories ---- */
.stories{overflow:hidden;}
.marquee{margin-top:56px;display:flex;gap:26px;width:max-content;animation:et-scroll 46s linear infinite;}
.marquee:hover{animation-play-state:paused;}
@keyframes et-scroll{from{transform:translateX(0);}to{transform:translateX(-50%);}}
.story{position:relative;flex:none;width:360px;height:440px;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-lg);}
.story img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.story .scrim{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,26,77,.15) 0%,rgba(10,26,77,.55) 52%,rgba(10,26,77,.94) 100%);}
.story .body{position:absolute;inset:0;padding:26px;display:flex;flex-direction:column;justify-content:flex-end;}
.badge{display:inline-flex;align-items:center;align-self:flex-start;font-family:var(--font-ui);font-weight:600;font-size:13px;
  padding:6px 13px;border-radius:var(--r-pill);background:var(--gold-400);color:var(--ink-900);margin-bottom:16px;}
.story q{display:block;font-family:var(--font-display);font-weight:600;font-size:21px;line-height:1.3;color:var(--white);margin:0 0 12px;quotes:"\201C" "\201D";}
.story .name{font-family:var(--font-ui);font-size:14px;font-weight:600;color:rgba(255,255,255,.82);}

/* ---- Final CTA + form ---- */
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;}
.cta-grid h2{font-weight:600;font-size:clamp(32px,4.4vw,58px);line-height:1.05;margin:18px 0 18px;}
.form{background:var(--white);border-radius:var(--r-xl);padding:36px;box-shadow:var(--shadow-lg);border:1px solid var(--line);}
.field{display:block;}
.field label{display:block;font-family:var(--font-ui);font-weight:600;font-size:13px;color:var(--ink-700);margin-bottom:7px;}
.field input,.field select,.field textarea{width:100%;font-family:var(--font-body);font-size:16px;color:var(--ink-900);
  background:var(--white);border:1.5px solid var(--line);border-radius:var(--r-md);padding:13px 15px;outline:none;
  transition:border-color .16s var(--ease-soft),box-shadow .16s var(--ease-soft);}
.field textarea{resize:vertical;line-height:1.5;}
.field select{appearance:none;-webkit-appearance:none;cursor:pointer;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue-700);box-shadow:0 0 0 3px rgba(240,212,48,.35);}
.form-grid{display:grid;gap:18px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.form .btn{width:100%;}
.form-success{text-align:center;padding:40px 10px;}
.form-success .mark{font-size:30px;color:var(--gold-500);}
.form-success h3{font-weight:600;font-size:26px;margin:12px 0 8px;}
.form-success p{font-size:16px;color:var(--ink-700);margin:0;}

/* ---- Footer ---- */
.footer{background:var(--ink-900);padding:56px var(--gutter) 40px;}
.footer .row{max-width:var(--container);margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px;}
.footer .brand span{font-size:19px;}
.footer p{font-size:14px;color:rgba(255,255,255,.5);margin:0;}

/* ---- Scroll reveal ---- */
[data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease-soft),transform .7s var(--ease-soft);}
[data-reveal].in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none;transition:none;}
  .marquee{animation:none;}
  html{scroll-behavior:auto;}
}

/* ============ RESPONSIVE ============ */
@media (max-width:960px){
  :root{--section-y:80px;--gutter:24px;}
  .mentor-grid{grid-template-columns:1fr;gap:40px;justify-items:center;text-align:center;}
  .mentor-grid .eyebrow{justify-content:center;}
  .cta-grid{grid-template-columns:1fr;gap:40px;}
}
@media (max-width:760px){
  .nav-toggle{display:flex;}
  .nav-links{position:absolute;top:100%;right:var(--gutter);left:var(--gutter);flex-direction:column;align-items:stretch;
    gap:4px;background:rgba(10,26,77,.97);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.12);
    border-radius:var(--r-md);padding:14px;box-shadow:var(--shadow-lg);
    opacity:0;transform:translateY(-8px);pointer-events:none;transition:opacity .2s,transform .2s var(--ease-soft);}
  .nav-links.open{opacity:1;transform:none;pointer-events:auto;}
  .nav-links a{padding:12px 10px;border-radius:8px;font-size:16px;}
  .nav-links a:hover{background:rgba(255,255,255,.08);}
  .nav-links .btn{margin-top:6px;}
  .grid-3,.subjects-grid{grid-template-columns:1fr;gap:24px;}
  .subjects-grid{margin-top:40px;}
  .arch{max-width:380px;margin:0 auto;}
  .form-row{grid-template-columns:1fr;}
  .hero{min-height:88vh;}
  .footer .row{flex-direction:column;align-items:flex-start;text-align:left;}
}
@media (max-width:420px){
  :root{--gutter:18px;}
  .btn,.cta-row .btn{width:100%;}
  .cta-row{gap:12px;}
  .story{width:84vw;}
}