/* ==========================================================================
   Bayon English Institute — brand stylesheet
   Palette: Navy #0F2D52 · Gold #C89A4B · White · Mist #F5F7FA
   Type:   Cormorant Garamond (display) · Inter (body/UI)
   ========================================================================== */

:root{
  --navy:#0F2D52;
  --navy-2:#0A2140;
  --navy-3:#081A33;
  --gold:#C89A4B;
  --gold-2:#E3C583;
  --ink:#17263c;
  --muted:#5a6b81;
  --mist:#F5F7FA;
  --line:#e5eaf1;
  --white:#ffffff;

  --maxw:1140px;
  --pad:clamp(20px,5vw,40px);
  --r:16px;
  --shadow:0 22px 60px rgba(15,45,82,.12);
  --shadow-sm:0 6px 20px rgba(15,45,82,.08);

  --serif:"Cormorant Garamond",Georgia,serif;
  --sans:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--white);
  line-height:1.7;
  font-size:17px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.06;letter-spacing:-.01em;color:var(--navy)}
em{font-style:italic}
::selection{background:var(--gold-2);color:var(--navy-2)}

.container{max-width:var(--maxw);margin:0 auto;padding-inline:var(--pad)}

/* ---------- Buttons ---------- */
.btn{
  --bg:var(--gold);--fg:var(--navy-2);
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  background:var(--bg);color:var(--fg);
  font-family:var(--sans);font-weight:700;font-size:.98rem;letter-spacing:.005em;
  padding:.85em 1.5em;border-radius:12px;border:0;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;
  box-shadow:0 10px 24px rgba(200,154,75,.28);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(200,154,75,.36)}
.btn:active{transform:translateY(0)}
.btn-sm{padding:.6em 1.05em;font-size:.9rem;border-radius:10px;box-shadow:none}
.btn-sm:hover{box-shadow:0 8px 20px rgba(200,154,75,.3)}
.btn-lg{padding:1em 1.8em;font-size:1.05rem}
.btn-block{width:100%}
.btn-ghost{
  --bg:transparent;--fg:var(--navy);
  border:1.5px solid rgba(15,45,82,.22);box-shadow:none;
}
.btn-ghost:hover{background:rgba(15,45,82,.05);box-shadow:none;transform:translateY(-2px)}
.btn-ghost--light{--fg:#fff;border-color:rgba(255,255,255,.4)}
.btn-ghost--light:hover{background:rgba(255,255,255,.1)}
.ico-wa{width:1.2em;height:1.2em;fill:currentColor;flex:0 0 auto}

/* ---------- Reveal on scroll (progressive: only hides when JS present) ---------- */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1 !important;transform:none !important;transition:none}
}

/* ==========================================================================
   NAV
   ========================================================================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  transition:background .3s ease,box-shadow .3s ease,padding .3s ease;
  padding:14px 0;
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:11px}
.brand-mark{width:38px;height:auto;filter:drop-shadow(0 2px 6px rgba(0,0,0,.15))}
.brand-text{font-family:var(--serif);font-size:1.32rem;font-weight:600;color:#fff;line-height:1;letter-spacing:.01em}
.brand-text em{color:var(--gold-2);font-style:normal;font-weight:600}
.nav.scrolled{background:rgba(255,255,255,.94);backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(15,45,82,.09);padding:9px 0}
.nav.scrolled .brand-text{color:var(--navy)}
.nav.scrolled .brand-text em{color:var(--gold)}
.nav.scrolled .brand-mark{filter:none}
.nav.scrolled .nav-links a{color:var(--navy)}

.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{color:rgba(255,255,255,.92);font-size:.95rem;font-weight:500;transition:color .2s}
.nav-links a:not(.btn):hover{color:var(--gold-2)}
.nav.scrolled .nav-links a:not(.btn):hover{color:var(--gold)}
.nav-links .btn{color:var(--navy-2)}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#fff;border-radius:2px;transition:.25s}
.nav.scrolled .nav-toggle span{background:var(--navy)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.nav-mobile{
  display:none;flex-direction:column;gap:4px;
  background:rgba(255,255,255,.98);backdrop-filter:blur(10px);
  padding:14px var(--pad) 22px;border-top:1px solid var(--line);
  box-shadow:0 12px 24px rgba(15,45,82,.12);
}
.nav-mobile a{color:var(--navy);font-weight:600;padding:11px 4px;border-bottom:1px solid var(--line)}
.nav-mobile a.btn{color:var(--navy-2);margin-top:10px;border:0;justify-content:center}
.nav-mobile .link-wa{color:var(--muted);font-weight:500;border:0;font-size:.9rem}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{
  position:relative;
  background:
    radial-gradient(120% 90% at 85% -10%, rgba(200,154,75,.16), transparent 55%),
    linear-gradient(155deg,var(--navy) 0%,var(--navy-2) 60%,var(--navy-3) 100%);
  color:#fff;
  padding:calc(88px + 6vh) 0 clamp(64px,10vh,120px);
  overflow:hidden;
}
.hero-glow{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(50% 45% at 15% 110%,rgba(200,154,75,.12),transparent 60%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(30px,5vw,64px);align-items:center}
.kicker{
  display:inline-block;text-transform:uppercase;letter-spacing:.26em;
  font-size:.74rem;font-weight:700;color:var(--gold-2);margin-bottom:20px;
}
.hero h1{font-size:clamp(2.35rem,5.2vw,4rem);color:#fff;margin-bottom:20px}
.hero h1 em{color:var(--gold-2);font-style:italic}
.lede{font-size:clamp(1.05rem,1.7vw,1.24rem);color:#d5deee;max-width:34ch;margin-bottom:30px;line-height:1.6}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:20px}
.hero-trust{font-size:.85rem;color:#9fb0c9;letter-spacing:.02em}

/* Signature: transformation chat card */
.hero-chat{display:flex;justify-content:center}
.chat-card{
  position:relative;width:100%;max-width:360px;
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.14);
  border-radius:22px;padding:26px 24px 30px;
  backdrop-filter:blur(6px);box-shadow:0 30px 70px rgba(0,0,0,.28);
}
.chat-card::after{content:"";position:absolute;right:-26px;bottom:-26px;width:150px;height:150px;
  border:2px solid rgba(200,154,75,.22);border-radius:50% 50% 50% 8px;pointer-events:none}
.chat-tag{text-transform:uppercase;letter-spacing:.18em;font-size:.66rem;font-weight:700;margin-bottom:9px}
.chat-tag--before{color:#8fa2bd}
.chat-tag--after{color:var(--gold-2);margin-top:18px}
.bubble{padding:15px 18px;font-size:1.02rem;line-height:1.45;position:relative}
.bubble-in{
  background:rgba(255,255,255,.09);color:#c8d3e4;border-radius:16px 16px 16px 5px;
  font-style:italic;
}
.bubble-out{
  background:var(--gold);color:var(--navy-2);border-radius:16px 16px 5px 16px;
  font-weight:600;min-height:52px;display:flex;align-items:center;
}
.chat-arrow{display:flex;justify-content:center;margin:14px 0 2px}
.chat-arrow svg{width:26px;height:26px;fill:none;stroke:var(--gold-2);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;opacity:.8}
.bubble-final{opacity:0;animation:bubbleAppear .45s ease forwards;animation-delay:1.9s}
.typing{position:absolute;left:18px;display:inline-flex;gap:5px;align-items:center;
  animation:typingHide .3s ease forwards;animation-delay:1.75s}
.typing i{width:7px;height:7px;border-radius:50%;background:var(--navy-2);opacity:.55;animation:typingDot 1s infinite}
.typing i:nth-child(2){animation-delay:.18s}
.typing i:nth-child(3){animation-delay:.36s}
@keyframes typingDot{0%,60%,100%{transform:translateY(0);opacity:.4}30%{transform:translateY(-4px);opacity:.9}}
@keyframes typingHide{to{opacity:0;visibility:hidden}}
@keyframes bubbleAppear{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .bubble-final{opacity:1;animation:none}
  .typing{display:none}
}

/* ==========================================================================
   SECTIONS (shared)
   ========================================================================== */
.section{padding:clamp(64px,9vw,112px) 0}
.section--mist{background:var(--mist)}
.section--navy{
  background:radial-gradient(110% 80% at 90% 0%,rgba(200,154,75,.12),transparent 55%),
             linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 100%);
  color:#fff;
}
.eyebrow{text-transform:uppercase;letter-spacing:.24em;font-size:.76rem;font-weight:700;color:var(--gold);margin-bottom:14px}
.eyebrow--gold{color:var(--gold-2)}
.tm{font-size:.6em;vertical-align:super;letter-spacing:0}
.section-title{font-size:clamp(1.85rem,3.6vw,2.9rem);margin-bottom:0}
.section-title--light{color:#fff}
.section-lede{font-size:1.12rem;color:var(--muted);max-width:56ch;margin-top:18px;line-height:1.65}
.section--navy .section-lede{color:#c6d2e4}
.section-note{margin-top:44px;font-size:1.15rem;line-height:1.6;max-width:62ch;color:var(--ink)}
.section-note strong{color:var(--navy)}

/* ---------- Problem cards ---------- */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:48px}
.pcard{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:30px 26px;box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.pcard-no{font-family:var(--serif);font-size:2.3rem;font-weight:600;color:var(--gold);line-height:1;display:block;margin-bottom:14px}
.pcard h3{font-size:1.28rem;margin-bottom:10px;line-height:1.15}
.pcard p{color:var(--muted);font-size:1rem}

/* ---------- Professions ---------- */
.prof-grid{
  list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px;
}
.prof{
  display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:28px 14px;font-weight:600;color:var(--navy);font-size:1.02rem;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.prof:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:var(--gold-2)}
.prof-ico{
  width:56px;height:56px;display:grid;place-items:center;border-radius:14px;
  background:linear-gradient(160deg,rgba(15,45,82,.06),rgba(200,154,75,.1));
}
.prof-ico svg{width:32px;height:32px;fill:none;stroke:var(--navy);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.also{margin-top:34px;border-left:3px solid var(--gold);padding:14px 0 14px 22px}
.also p{font-size:1.08rem;color:var(--ink);max-width:64ch}
.also strong{color:var(--navy)}

/* ---------- Method (BAYON) ---------- */
.method{margin-top:48px;display:grid;gap:6px}
.method-row{display:flex;gap:24px;align-items:baseline;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.method-row:last-child{border-bottom:0}
.method-letter{
  font-family:var(--serif);font-size:clamp(2.6rem,5vw,3.6rem);font-weight:600;
  color:var(--gold-2);line-height:.9;min-width:1.4ch;flex:0 0 auto;
}
.method-row h3{color:#fff;font-size:1.4rem;margin-bottom:6px}
.method-row p{color:#c6d2e4;max-width:60ch;font-size:1.02rem}

/* ---------- Guía / lead magnet ---------- */
.guia-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(34px,5vw,64px);align-items:center}
.guia-visual{position:relative;display:flex;justify-content:center}
.guia-cover{
  width:min(340px,80%);border-radius:12px;
  box-shadow:0 30px 70px rgba(15,45,82,.28);
  transform:rotate(-2.5deg);transition:transform .35s ease;
  border:1px solid rgba(15,45,82,.08);
}
.guia-visual:hover .guia-cover{transform:rotate(0)}
.guia-badge{
  position:absolute;top:8px;right:calc(10% - 6px);
  background:var(--navy);color:#fff;font-size:.72rem;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;padding:8px 13px;border-radius:9px;
  box-shadow:var(--shadow-sm);
}
.check{list-style:none;margin:22px 0 30px;display:grid;gap:11px}
.check li{position:relative;padding-left:32px;color:var(--ink);font-size:1.04rem}
.check li::before{
  content:"";position:absolute;left:0;top:3px;width:19px;height:19px;border-radius:50% 50% 50% 3px;
  background:var(--gold);
}
.check li::after{content:"";position:absolute;left:6px;top:8px;width:7px;height:4px;
  border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg)}

/* Form */
.lead-form{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--shadow-sm)}
.field{margin-bottom:15px}
.field label{display:block;font-size:.85rem;font-weight:600;color:var(--navy);margin-bottom:6px}
.field .opt{color:var(--muted);font-weight:400}
.field input,.field select{
  width:100%;font-family:var(--sans);font-size:1rem;color:var(--ink);
  padding:.8em .95em;border:1.5px solid var(--line);border-radius:10px;background:#fff;
  transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(200,154,75,.18)}
.field input::placeholder{color:#9aa8bb}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;opacity:0}
.form-msg{margin-top:12px;font-size:.92rem;font-weight:600;display:none}
.form-msg.show{display:block}
.form-msg.ok{color:#1f7a4d}
.form-msg.err{color:#b23b3b}
.form-fine{margin-top:12px;font-size:.8rem;color:var(--muted);text-align:center}
.btn.is-loading{position:relative;color:transparent;pointer-events:none}
.btn.is-loading::after{content:"";position:absolute;width:18px;height:18px;border:2.5px solid rgba(10,33,64,.35);border-top-color:var(--navy-2);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Instructor ---------- */
.instructor-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(32px,5vw,60px);align-items:center}
.instructor-photo{position:relative;aspect-ratio:4/5;border-radius:20px;overflow:hidden;
  background:linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 100%);box-shadow:var(--shadow)}
.instructor-photo img{width:100%;height:100%;object-fit:cover;position:relative;z-index:2}
.photo-monogram{position:absolute;inset:0;display:grid;place-items:center;z-index:1;
  font-family:var(--serif);font-size:5rem;font-weight:600;color:rgba(227,197,131,.9);letter-spacing:.05em}
.instructor-photo.no-photo{border:1px solid var(--line)}
.i-stats{display:flex;gap:28px;margin:2px 0 22px;flex-wrap:wrap}
.i-stat{display:flex;flex-direction:column}
.i-num{font-family:var(--serif);font-size:1.9rem;font-weight:600;color:var(--navy);line-height:1}
.i-lbl{font-size:.82rem;color:var(--muted);margin-top:5px;max-width:13ch;line-height:1.3}
.instructor-copy p{color:var(--muted);margin-bottom:16px;font-size:1.06rem}
.instructor-copy .eyebrow{margin-bottom:12px}
.instructor-copy .section-title{margin-bottom:20px}
.quote-block{
  font-family:var(--serif);font-style:italic;font-size:1.4rem;line-height:1.4;color:var(--navy);
  border-left:3px solid var(--gold);padding:6px 0 6px 22px;margin:24px 0 28px;
}

/* ---------- CTA band ---------- */
.cta-band{
  background:radial-gradient(100% 120% at 10% 0%,rgba(200,154,75,.16),transparent 55%),
             linear-gradient(150deg,var(--navy) 0%,var(--navy-3) 100%);
  color:#fff;padding:clamp(64px,9vw,110px) 0;text-align:center;
}
.cta-inner{max-width:720px;margin:0 auto}
.cta-band h2{color:#fff;font-size:clamp(2rem,4vw,3.1rem);margin-bottom:18px}
.cta-band p{color:#cdd8ea;font-size:1.14rem;line-height:1.6;margin-bottom:30px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ---------- Footer ---------- */
.footer{background:var(--navy-3);color:#aeb9cc;padding:56px 0 0}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px;align-items:start;padding-bottom:36px}
.footer-brand{display:flex;gap:14px;align-items:flex-start}
.footer-mark{width:44px;background:#fff;border-radius:10px;padding:5px}
.footer-name{font-family:var(--serif);font-size:1.3rem;color:#fff;font-weight:600;line-height:1}
.footer-name em{color:var(--gold-2);font-style:normal}
.footer-tag{font-size:.9rem;margin-top:6px;color:#93a1b8;max-width:34ch}
.footer-nav{display:flex;flex-direction:column;gap:11px}
.footer-nav a{font-size:.95rem;transition:color .2s}
.footer-nav a:hover{color:var(--gold-2)}
.footer-contact{display:flex;flex-direction:column;gap:9px;font-size:.95rem}
.footer-contact a:hover{color:var(--gold-2)}
.footer-legal{border-top:1px solid rgba(255,255,255,.1);padding-block:20px;font-size:.82rem;color:#7f8da4}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width:900px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-mobile:not([hidden]){display:flex}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-chat{order:2;justify-content:flex-start}
  .chat-card{max-width:420px}
  .cards-3{grid-template-columns:1fr;gap:16px}
  .prof-grid{grid-template-columns:repeat(2,1fr)}
  .guia-grid{grid-template-columns:1fr;gap:38px}
  .guia-visual{order:-1}
  .instructor-grid{grid-template-columns:1fr}
  .instructor-photo{max-width:360px;margin:0 auto}
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:520px){
  body{font-size:16px}
  .prof-grid{grid-template-columns:1fr 1fr;gap:12px}
  .prof{padding:22px 10px;font-size:.95rem}
  .hero-cta .btn{width:100%}
  .cta-actions .btn{width:100%}
  .footer-inner{grid-template-columns:1fr}
  .method-row{gap:16px}
}