/* ==========================================================================
   Ki Education — main stylesheet
   Design system: premium, dental, institutional. Black/white + red accents.
   ========================================================================== */

:root {
  --black:   #000000;
  --white:   #ffffff;
  --red:     #C20000;
  --red-2:   #DA0000;
  --red-3:   #E00000;
  --red-4:   #B60000;
  --g-900:   #0d0d0d;
  --g-800:   #1a1a1a;
  --g-700:   #2F2F2F;
  --g-600:   #353535;
  --g-500:   #515151;
  --g-300:   #cccccc;
  --g-200:   #e6e6e6;
  --g-100:   #f3f3f3;

  --font: 'Jost', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --font-heading: 'Raleway', 'Jost', system-ui, -apple-system, sans-serif;
  --maxw: 1180px;
  --radius: 8px;
  --shadow: 0 2px 4px rgba(0,0,0,.06), 0 10px 28px rgba(0,0,0,.11);
  --shadow-lg: 0 4px 8px rgba(0,0,0,.1), 0 24px 52px rgba(0,0,0,.22);
  --shadow-red: 0 12px 32px rgba(194,0,0,.28);
  --ease: cubic-bezier(.22,.61,.36,1);
  --header-h: 84px;
}

/* Global micro-details */
::selection { background: var(--red); color: var(--white); }
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--red); border-radius: 0; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-weight: 300;
  color: var(--g-700);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4,
.section-title,
.page-hero__title,
.hero__title,
.course-hero__title,
.course-card__title,
.post-card__title,
.post-content__title,
.brand-text { font-family: var(--font-heading); }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 760px; }
.center { text-align: center; }
.muted { color: var(--g-500); }
.muted-light { color: var(--g-300); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 34px;
  font-family: var(--font); font-size: 13px; font-weight: 400;
  text-transform: uppercase; letter-spacing: 3px;
  border: 0; border-radius: 2px; cursor: pointer;
  transition: background .25s var(--ease), color .25s var(--ease), transform .2s var(--ease), box-shadow .25s var(--ease);
}
.btn--primary { background: var(--red); color: var(--white); }
.btn--primary:hover { background: var(--black); transform: translateY(-3px); box-shadow: var(--shadow-red); }
.btn--ghost { background: transparent; color: var(--red); border: 1px solid var(--red); }
.btn--ghost:hover { background: var(--red); color: #fff; transform: translateY(-2px); }
.btn--block { width: 100%; justify-content: center; }

/* ---------- Section scaffolding ---------- */
.section { padding: 84px 0; }
.section--tight { padding: 48px 0; }
.section--center-screen { min-height: 70vh; display: grid; place-items: center; padding: 100px 0; }
.section-head { margin-bottom: 40px; }
.section-head--center { text-align: center; }
.section-eyebrow {
  display: block; font-size: 22px; font-weight: 300; letter-spacing: 9px;
  text-transform: uppercase; color: var(--g-500);
}
.section-eyebrow.light { color: var(--g-300); }
.section-title {
  margin: 0; font-size: clamp(30px, 5vw, 50px); font-weight: 500;
  text-transform: uppercase; letter-spacing: 1.5px; color: var(--black); line-height: 1.05;
}
.section-title.light { color: var(--white); }
.section-lead { max-width: 640px; margin: 14px auto 0; font-size: 18px; color: var(--g-500); }
.section-head--center .section-lead { margin-inline: auto; }
.section-cta { margin-top: 44px; text-align: center; }

.rich p { margin: 0 0 1em; }
.rich strong { font-weight: 600; }
.rich ul { list-style: disc; padding-left: 1.3em; margin: 0 0 1em; }
.rich h2, .rich h3, .rich h4 { color: var(--black); font-weight: 500; }
.rich--light, .rich--light * { color: var(--g-200); }
.post-rich img { max-width: 100%; height: auto; border-radius: var(--radius); display: block; margin: 1.5em auto; }

.media-ph {
  display: grid; place-items: center; min-height: 280px;
  background: var(--g-100); color: var(--g-500); border-radius: var(--radius);
  font-size: 14px; letter-spacing: 1px; text-transform: uppercase;
}
.media-ph--tall { min-height: 460px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: #000;
  border-bottom: 1px solid rgba(194,0,0,.18);
  transition: background .3s ease, backdrop-filter .3s ease;
}
.site-header.is-scrolled {
  background: rgba(0,0,0,.88); backdrop-filter: blur(8px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.brand-text { color: #fff; font-size: 22px; font-weight: 300; letter-spacing: 3px; }
.brand-text strong { font-weight: 600; }
.main-nav > ul { display: flex; gap: 28px; }
.main-nav a {
  color: #fff; font-size: 13px; font-weight: 400; letter-spacing: 3px; text-transform: uppercase;
  padding: 10px 2px; position: relative; transition: color .2s;
}
.main-nav a::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--red); transition: width .25s var(--ease);
}
.main-nav a:hover { color: var(--red-3); }
.main-nav a:hover::after { width: 100%; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-sub-toggle { display: none; }
.nav-toggle span { width: 26px; height: 2px; background: #fff; transition: .3s; }
.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); }

/* ---------- Hero slider ---------- */
.hero { position: relative; overflow: hidden; background: var(--black); }
.hero__track { position: relative; }
.hero__slide {
  display: none; min-height: 640px; align-items: center;
  background-size: cover; background-position: center;
  position: relative;
}
.hero__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.hero__slide::before { content:''; position:absolute; inset:0; z-index: 1; background: linear-gradient(90deg, rgba(0,0,0,.82) 0%, rgba(0,0,0,.45) 60%, rgba(0,0,0,.25) 100%); }
.hero__slide.is-active { display: flex; animation: fade .8s var(--ease); }
.hero__content { position: relative; z-index: 2; max-width: 620px; padding-block: 60px; }
.hero__title {
  margin: 0 0 18px; color: #fff; font-weight: 200; font-size: clamp(30px, 5vw, 44px);
  letter-spacing: 8px; text-transform: uppercase; line-height: 1.25;
}
.hero__subtitle { color: var(--g-200); font-size: 19px; margin: 0 0 30px; }
.hero__dots { position: absolute; bottom: 32px; left: 0; right: 0; display: flex; gap: 8px; justify-content: center; z-index: 2; }
.hero__dots button { width: 8px; height: 8px; border: 0; border-radius: 50%; background: rgba(255,255,255,.35); cursor: pointer; transition: background .25s var(--ease), transform .25s var(--ease); }
.hero__dots button.is-active { background: var(--red-3); transform: scale(1.35); }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Page hero ---------- */
.page-hero { padding: 150px 0 90px; background: var(--black); background-size: cover; background-position: center; position: relative; }
.page-hero--image::before { content:''; position:absolute; inset:0; background: rgba(0,0,0,.55); }
.page-hero .container { position: relative; }
.page-hero__title { margin: 0; font-size: clamp(34px, 6vw, 56px); font-weight: 500; text-transform: uppercase; letter-spacing: 2px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { background: var(--g-100); font-size: 13px; letter-spacing: .5px; }
.breadcrumb .container { padding-block: 14px; display: flex; gap: 8px; color: var(--g-500); }
.breadcrumb a { color: var(--red); }

/* ---------- Course cards ---------- */
.courses-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.courses-grid--4 { grid-template-columns: repeat(4, 1fr); }
.course-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); display: flex; flex-direction: column;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.course-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.course-card__media { position: relative; display: block; aspect-ratio: 16/9; background: var(--g-100); overflow: hidden; }
.course-card__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.02); transition: transform .55s var(--ease), filter .55s var(--ease); }
.course-card__media::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, rgba(0,0,0,.12) 0%, rgba(0,0,0,.32) 55%, rgba(0,0,0,.62) 100%); transition: opacity .45s var(--ease); }
.course-card:hover .course-card__media img { transform: scale(1.05); filter: grayscale(0) contrast(1); }
.course-card:hover .course-card__media::after { opacity: .8; }
.course-card__ph { position:absolute; inset:0; display:grid; place-items:center; color: var(--g-500); font-size: 13px; text-transform: uppercase; z-index: 1; }
.course-card__body { padding: 22px 22px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.course-card__title { margin: 0; font-size: 17px; font-weight: 600; color: var(--black); text-transform: uppercase; letter-spacing: .5px; line-height: 1.2; }
.course-card__desc { margin: 0; font-size: 14px; color: var(--g-500); flex: 1; line-height: 1.55; }
.badge { position: absolute; top: 12px; left: 12px; z-index: 2; padding: 5px 12px; font-size: 11px; letter-spacing: 1px; text-transform: uppercase; border-radius: 2px; color: #fff; background: var(--g-600); }
.badge--aberto { background: #0e8a00; }
.badge--esgotado { background: var(--g-500); }
.badge--em_breve { background: var(--red); }
.badge--encerrado { background: #444; }

/* ---------- About / CTA ---------- */
.section--about { background: var(--g-100); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-grid--rev .about-text { order: -1; }
.about-media img { border-radius: var(--radius); width: 100%; object-fit: cover; }
.about-text .section-title { margin-bottom: 18px; }

.section--cta-dark { background: var(--black); color: #fff; }
.section--cta-dark .container.center { display: flex; flex-direction: column; align-items: center; gap: 28px; }
.section--cta-dark .container.center .section-title { margin: 0; }
.cta-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 40px; align-items: center; }
.cta-phone { text-align: right; }
.cta-phone__label { display: block; font-size: 12px; letter-spacing: 3px; text-transform: uppercase; color: var(--g-300); }
.cta-phone__num { font-size: 26px; font-weight: 300; letter-spacing: 2px; }

/* ---------- Structure carousel ---------- */
.section--structure { background: var(--white); }
.carousel { position: relative; display: flex; align-items: center; gap: 12px; }
.carousel__viewport { overflow: hidden; flex: 1; }
.carousel__track { display: flex; gap: 18px; transition: transform .4s var(--ease); }
.carousel__item { flex: 0 0 calc((100% - 36px) / 3); margin: 0; border-radius: var(--radius); overflow: hidden; background: transparent; }
.carousel__item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; border-radius: var(--radius); }
.carousel__nav { width: 46px; height: 46px; border-radius: 50%; border: 0; background: rgba(0,0,0,.7); color: #fff; font-size: 24px; cursor: pointer; flex: 0 0 auto; transition: background .2s; }
.carousel__nav:hover { background: var(--red); }

/* ---------- Testimonials ---------- */
.testimonials-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.testimonial {
  margin: 0; background: var(--g-100); border-radius: var(--radius); padding: 36px 32px 30px;
  position: relative; overflow: hidden;
}
.testimonial::before {
  content: '\201C'; position: absolute; top: -14px; left: 18px;
  font-size: 120px; line-height: 1; font-family: Georgia, serif; font-weight: 700;
  color: var(--red); opacity: .12; pointer-events: none; user-select: none;
}
.testimonial__text { font-style: italic; font-size: 16px; color: var(--g-700); margin: 0 0 22px; position: relative; line-height: 1.65; }
.testimonial__author { display: flex; align-items: center; gap: 14px; }
.testimonial__author img { width: 52px; height: 52px; border-radius: 50%; object-fit: cover; box-shadow: 0 0 0 2px var(--red); }
.testimonial__author strong { display: block; color: var(--black); }
.testimonial__author em { font-style: normal; font-size: 13px; color: var(--g-500); }

/* ---------- Course detail ---------- */
.course-hero { background: var(--black); color: #fff; padding: 140px 0 70px; }
.course-hero__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.course-hero__title { margin: 6px 0 14px; font-size: clamp(30px,5vw,46px); font-weight: 500; text-transform: uppercase; letter-spacing: 1px; line-height: 1.05; }
.course-hero__subtitle { font-size: 20px; color: var(--g-200); margin: 0 0 18px; }
.course-hero__media img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; object-fit: cover; }

.course-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); background: var(--g-100); border-radius: var(--radius); padding: 0; overflow: hidden; }
.course-facts li { font-size: 16px; color: var(--g-700); font-weight: 400; padding: 22px 24px; border-right: 1px solid var(--g-200); }
.course-facts li:last-child { border-right: 0; }
.course-facts li span { display: block; font-size: 10px; letter-spacing: 2.5px; text-transform: uppercase; color: var(--red); margin-bottom: 6px; font-weight: 500; }

.tabs__nav { display: flex; flex-wrap: wrap; gap: 0; border-bottom: 1px solid var(--g-200); }
.tabs__tab { padding: 16px 24px; background: none; border: 0; font-family: var(--font); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; color: var(--g-500); cursor: pointer; border-bottom: 4px solid transparent; transition: color .2s, border-color .2s; }
.tabs__tab:hover { color: var(--g-700); }
.tabs__tab.is-active { color: var(--red); border-bottom-color: var(--red); font-weight: 500; }
.tabs__panel { display: none; padding: 30px 0; }
.tabs__panel.is-active { display: block; animation: fade .3s var(--ease); }

.section--faculty { background: var(--g-100); }
.faculty-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; }
.faculty-card { text-align: center; }
.faculty-card__photo { width: 180px; height: 180px; border-radius: 50%; object-fit: cover; margin: 0 auto 16px; box-shadow: var(--shadow); }
.faculty-card__name { margin: 0 0 8px; text-transform: uppercase; letter-spacing: 1px; font-weight: 500; color: var(--black); }
.faculty-card__bio { font-size: 14px; color: var(--g-500); }
.faculty-card__ig { color: var(--red); font-size: 13px; text-transform: uppercase; letter-spacing: 1px; }
.faculty-card__spec { font-size: 13px; color: var(--red); text-transform: uppercase; letter-spacing: 1px; margin: 0 0 8px; }
.faculty-card--link .faculty-card__inner { display: block; text-decoration: none; color: inherit; }
.faculty-card--link:hover .faculty-card__photo { box-shadow: 0 0 0 3px var(--red), 0 8px 24px rgba(194,0,0,.2); transform: scale(1.03); }
.faculty-card__photo { transition: box-shadow .3s var(--ease), transform .3s var(--ease); }
.faculty-card__photo--ph { width: 180px; height: 180px; border-radius: 50%; background: var(--g-200); margin: 0 auto 16px; }
.faculty-grid--wide { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 40px; }

/* ---- Course filter ---- */
.courses-filter { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; flex-wrap: wrap; }
.courses-filter select { padding: 9px 14px; border: 1px solid var(--g-200); border-radius: 6px; font: inherit; font-size: 14px; background: #fff; cursor: pointer; }
.courses-filter__count { font-size: 13px; color: var(--g-500); margin-left: auto; }

/* ---------- Blog ---------- */
.posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.post-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.post-card__media { display: block; aspect-ratio: 16/10; background: var(--g-100); }
.post-card__media img { width: 100%; height: 100%; object-fit: cover; }
.post-card__body { padding: 20px; }
.post-card__date { font-size: 12px; color: var(--red); letter-spacing: 1px; text-transform: uppercase; }
.post-card__title { margin: 8px 0; font-size: 19px; font-weight: 500; color: var(--black); }
.post-card__excerpt { font-size: 14px; color: var(--g-500); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.link-more { color: var(--red); font-size: 13px; text-transform: uppercase; letter-spacing: 1px; }
.post-hero { min-height: 300px; background: var(--black); background-size: cover; background-position: center; position: relative; overflow: hidden; }
.post-hero__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.post-hero--image::before { content:''; position:absolute; inset:0; z-index: 1; background: rgba(0,0,0,.35); }
/* ---------- Post content layout ---------- */
.post-content-head { margin-bottom: 36px; padding-bottom: 28px; border-bottom: 1px solid var(--g-200); }
.post-content__title { margin: 0 0 18px; font-size: clamp(26px,4vw,40px); font-weight: 700; line-height: 1.15; letter-spacing: -.3px; text-transform: none; color: var(--black); }
.post-meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; color: var(--g-500); font-size: 13px; letter-spacing: .5px; }
.post-meta__date { text-transform: uppercase; color: var(--red); font-weight: 500; }
.post-meta__sep { color: var(--g-300); }
.post-meta__author { display: flex; align-items: center; gap: 8px; }
.post-meta__author img { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 40px; }
.pagination a { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 6px; background: var(--g-100); color: var(--g-700); }
.pagination a.is-active { background: var(--red); color: #fff; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.contact-list { margin: 20px 0; }
.contact-list li { padding: 8px 0 8px 24px; position: relative; color: var(--g-700); }
.contact-list li::before { content: '›'; position: absolute; left: 0; color: var(--red); font-weight: 700; }
.contact-phone { font-size: 24px; color: var(--black); font-weight: 400; letter-spacing: 1px; }
.contact-form-wrap { background: var(--g-900); color: #fff; padding: 40px; border-radius: var(--radius); }
.contact-form-title { font-size: 16px; text-transform: uppercase; letter-spacing: 2px; font-weight: 400; color: #fff; margin: 0 0 24px; }

/* ---------- Forms ---------- */
.form { display: flex; flex-direction: column; gap: 16px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; letter-spacing: 1px; text-transform: uppercase; color: var(--g-300); }
.form input, .form select, .form textarea {
  font-family: var(--font); font-size: 15px; padding: 12px 14px; border: 1px solid var(--g-600);
  background: #fff; color: var(--g-800); border-radius: 6px; text-transform: none; letter-spacing: 0;
}
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--red); border-color: var(--red); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hp { position: absolute; left: -9999px; }
.alert { padding: 14px 18px; border-radius: 6px; margin-bottom: 18px; font-size: 14px; }
.alert--error { background: #ffe5e5; color: #a00; }
.alert--ok { background: #e3f5e1; color: #176b0e; }

/* ---------- Footer ---------- */
.site-footer { background: var(--black); color: #fff; padding: 64px 0 48px; border-top: 1px solid var(--g-800); }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1.2fr; gap: 40px; }
.footer-copy { font-size: 12px; color: var(--g-300); letter-spacing: 1px; margin-top: 16px; }
.footer-nav h3, .footer-contact h3 { font-size: 18px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 16px; }
.footer-nav a { color: #fff; font-size: 13px; letter-spacing: 3px; text-transform: uppercase; line-height: 2; transition: color .2s; }
.footer-nav a:hover { color: var(--red-2); }
.footer-contact .ico span { display: block; font-size: 12px; color: var(--red-2); letter-spacing: 1px; text-transform: uppercase; }
.footer-contact .ico { font-size: 14px; color: var(--g-300); margin: 0 0 16px; }
.footer-social { display: flex; gap: 12px; margin-top: 12px; }
.footer-social a { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--red); color: #fff; flex-shrink: 0; transition: background .2s; }
.footer-social a:hover { background: var(--red-2); }
.footer-social a svg { display: block; flex-shrink: 0; }

/* ---------- Post cards ---------- */
.post-card { transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.post-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

/* ---------- Scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .1s; }
[data-reveal][data-delay="2"] { transition-delay: .2s; }
[data-reveal][data-delay="3"] { transition-delay: .3s; }
[data-reveal][data-delay="4"] { transition-delay: .4s; }
[data-reveal][data-delay="5"] { transition-delay: .5s; }

/* ---------- Course cards — CTA alignment + orphan fix ---------- */
.course-card__body .btn { margin-top: auto; }
.courses-grid > *:last-child:nth-child(3n + 1) { grid-column: 2; }

/* ---------- Course hero — reduced spacing ---------- */
.course-hero { background: var(--black); color: #fff; padding: 90px 0 48px; }
.course-hero__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }

/* ---------- Courses dropdown ---------- */
.main-nav .has-dropdown { position: relative; }
.nav-dropdown {
  position: absolute; top: calc(100% + 4px); left: -18px;
  background: #0f0f13; min-width: 280px;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  z-index: 100; padding: 12px 0;
  border-radius: 4px;
  box-shadow: 0 16px 48px rgba(0,0,0,.5);
  border-top: 2px solid var(--red);
  pointer-events: none;
}
.has-dropdown:hover .nav-dropdown,
.has-dropdown:focus-within .nav-dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
  pointer-events: auto;
}
.nav-dropdown li { list-style: none; }
.nav-dropdown a {
  display: block; padding: 9px 20px;
  font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase;
  color: rgba(255,255,255,.55);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 300px;
  transition: color .15s, background .15s;
}
.nav-dropdown a:hover { color: #fff; background: rgba(255,255,255,.05); }
.nav-dropdown a::after { display: none !important; }
.nav-dropdown__all { border-top: 1px solid rgba(255,255,255,.07); margin-top: 6px; padding-top: 2px; }
.nav-dropdown__all a { color: var(--red-3) !important; font-weight: 500; }
@media (max-width: 680px) {
  .nav-dropdown {
    position: static; opacity: 1; visibility: visible; transform: none;
    background: rgba(255,255,255,.04); box-shadow: none;
    border-top: 0; border-left: 2px solid var(--red);
    min-width: unset; border-radius: 0; pointer-events: auto;
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
    margin: 0; padding: 0;
  }
  .has-dropdown.is-open .nav-dropdown { max-height: 500px; margin: 0 0 4px 16px; }
  .has-dropdown__head { display: flex; align-items: center; }
  .has-dropdown__head a { flex: 1; }
  .nav-sub-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    background: none; border: 0; color: rgba(255,255,255,.6); cursor: pointer;
    width: 44px; height: 52px; font-size: 18px;
    transition: transform .25s ease; flex-shrink: 0;
  }
  .has-dropdown.is-open .nav-sub-toggle { transform: rotate(180deg); }
}

/* ---------- WhatsApp float — pulsing ---------- */
@keyframes wa-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37,211,102,.55), 0 8px 20px rgba(0,0,0,.3); }
  55%       { box-shadow: 0 0 0 14px rgba(37,211,102,0), 0 8px 20px rgba(0,0,0,.3); }
}
.wa-float { position: fixed; right: 22px; bottom: 22px; z-index: 60; width: 58px; height: 58px; border-radius: 50%; background: #25d366; color: #fff; display: grid; place-items: center; transition: transform .2s; animation: wa-pulse 2.5s ease-in-out infinite; }
.wa-float:hover { transform: scale(1.1); animation: none; box-shadow: 0 8px 28px rgba(37,211,102,.45); }

/* ---------- Error ---------- */
.error-code { display: block; font-size: 90px; font-weight: 600; color: var(--red); letter-spacing: 4px; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px) {
  .courses-grid, .courses-grid--4, .posts-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .cta-grid, .contact-grid, .course-hero__grid { grid-template-columns: 1fr; }
  .about-grid--rev .about-text { order: 0; }
  .cta-phone { text-align: left; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .carousel__item { flex: 0 0 calc((100% - 18px) / 2); }
}
@media (max-width: 680px) {
  .section { padding: 56px 0; }
  .page-hero { padding: 80px 0 40px; }
  .course-hero { padding: 56px 0 28px; }
  .nav-toggle { display: flex; }
  .main-nav { position: fixed; inset: var(--header-h) 0 auto 0; background: rgba(0,0,0,.97); max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
  .main-nav.is-open { max-height: 80vh; }
  .main-nav > ul { flex-direction: column; gap: 0; padding: 16px 24px 28px; }
  .main-nav li { border-bottom: 1px solid rgba(255,255,255,.08); }
  .main-nav .nav-dropdown li { border-bottom: 0; }
  .main-nav a { display: block; padding: 16px 0; }
  .courses-grid, .courses-grid--4, .posts-grid, .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .carousel__item { flex-basis: 100%; }
  .hero__slide { min-height: 520px; }
}

/* ---------- Tooltips ---------- */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute; bottom: calc(100% + 6px); left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,.85); color: #fff; font-size: 11px; letter-spacing: .5px;
  padding: 5px 10px; border-radius: 4px; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity .18s;
  z-index: 200;
}
[data-tooltip]:hover::after { opacity: 1; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}