/* =====================================================================
   Saraduro Educational Multi Links — Design System
   Bootstrap 5.3 + custom brand layer
   ===================================================================== */

:root {
  --seml-navy:        #0b0b42;
  --seml-navy-2:      #1c1c6a;
  --seml-accent:      #ff7846;
  --seml-accent-dark: #f4551f;
  --seml-gradient:    linear-gradient(115deg, var(--seml-navy) 0%, var(--seml-navy-2) 100%);
  --seml-radius:      1rem;
  --seml-shadow:      0 10px 30px rgba(11, 11, 66, .10);
  --seml-shadow-lg:   0 24px 60px rgba(11, 11, 66, .16);
  --seml-ring:        0 0 0 .25rem rgba(255, 120, 70, .25);
}

/* ---------- Base ---------- */
html { scroll-behavior: smooth; scroll-padding-top: 92px; }

body {
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bs-body-bg);
  color: var(--bs-body-color);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a { text-decoration: none; }
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: var(--seml-ring);
}

.display-2 { font-weight: 800; letter-spacing: -.02em; }

/* ---------- Brand utilities ---------- */
.text-accent { color: var(--seml-accent) !important; }
.bg-accent   { background-color: var(--seml-accent) !important; }
.bg-brand    { background: var(--seml-gradient) !important; }
.text-brand  { color: var(--seml-navy) !important; }

[data-bs-theme="dark"] .text-brand { color: #cfcfff !important; }

.eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--seml-accent);
  margin-bottom: .75rem;
}

.section { padding: 5rem 0; }
.section-sm { padding: 3.25rem 0; }
.section-alt { background: var(--bs-tertiary-bg); }

.section-head { max-width: 720px; margin: 0 auto 3rem; text-align: center; }
.section-head h2 { font-weight: 800; letter-spacing: -.02em; }
.section-head p { color: var(--bs-secondary-color); }

/* ---------- Buttons ---------- */
.btn-accent {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--seml-accent);
  --bs-btn-border-color: var(--seml-accent);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--seml-accent-dark);
  --bs-btn-hover-border-color: var(--seml-accent-dark);
  --bs-btn-active-bg: var(--seml-accent-dark);
  --bs-btn-active-border-color: var(--seml-accent-dark);
  --bs-btn-disabled-bg: var(--seml-accent);
  --bs-btn-disabled-border-color: var(--seml-accent);
  font-weight: 600;
}
.btn-accent:focus { box-shadow: var(--seml-ring); }

.btn-outline-accent {
  --bs-btn-color: var(--seml-accent);
  --bs-btn-border-color: var(--seml-accent);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--seml-accent);
  --bs-btn-hover-border-color: var(--seml-accent);
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: var(--seml-accent-dark);
  --bs-btn-active-border-color: var(--seml-accent-dark);
  font-weight: 600;
}

.btn-navy {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--seml-navy);
  --bs-btn-border-color: var(--seml-navy);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--seml-navy-2);
  --bs-btn-hover-border-color: var(--seml-navy-2);
  font-weight: 600;
}

/* ---------- Navbar ---------- */
.navbar-brand-img { height: 46px; width: auto; }

.navbar {
  background: var(--seml-gradient);
  box-shadow: 0 6px 24px rgba(11, 11, 66, .25);
}

.navbar .nav-link {
  color: rgba(255, 255, 255, .86);
  font-weight: 600;
  font-size: .95rem;
  padding: .5rem .7rem;
  border-radius: .5rem;
  transition: color .2s ease, background .2s ease;
}
.navbar .nav-link:hover,
.navbar .nav-link:focus { color: #fff; background: rgba(255, 255, 255, .10); }
.navbar .nav-link.active { color: #fff; background: rgba(255, 255, 255, .14); }

/* Mega menu */
.mega-menu {
  position: absolute;
  inset-inline-start: 50%;
  transform: translateX(-50%);
  width: min(920px, calc(100vw - 2rem));
  background: var(--bs-body-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: var(--seml-radius);
  box-shadow: var(--seml-shadow-lg);
  padding: 1.5rem;
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  z-index: 1050;
}
.nav-item.has-mega:hover .mega-menu,
.nav-item.has-mega:focus-within .mega-menu { display: grid; }

.mega-menu h6 {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--seml-accent);
  font-weight: 700;
  margin-bottom: .6rem;
}
.mega-menu .list-unstyled li { margin-bottom: .15rem; }
.mega-menu .dropdown-item {
  display: block;
  padding: .45rem .6rem;
  border-radius: .5rem;
  color: var(--bs-body-color);
  font-weight: 500;
  font-size: .93rem;
}
.mega-menu .dropdown-item:hover { background: var(--bs-tertiary-bg); color: var(--seml-accent); }

/* Nav theme toggle */
.nav-icon-btn {
  width: 40px; height: 40px;
  display: inline-grid; place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.25);
  background: rgba(255,255,255,.08);
  color: #fff;
  transition: background .2s, transform .2s;
}
.nav-icon-btn:hover { background: var(--seml-accent); transform: translateY(-2px); }

/* Offcanvas mobile nav */
.offcanvas { background: var(--seml-gradient); color: #fff; }
.offcanvas .nav-link { color: rgba(255,255,255,.88); font-weight: 600; border-bottom: 1px solid rgba(255,255,255,.08); border-radius: 0; }
.offcanvas .nav-link:hover, .offcanvas .nav-link.active { color: var(--seml-accent); background: transparent; }
.offcanvas .dropdown-item { color: rgba(255,255,255,.85); }
.offcanvas .dropdown-item:hover { color: var(--seml-accent); background: rgba(255,255,255,.06); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: clamp(540px, 92vh, 860px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--seml-navy);
}
.hero__media {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  will-change: transform;
}
.hero__overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(11,11,66,.94) 0%, rgba(11,11,66,.78) 45%, rgba(28,28,106,.45) 100%);
}
.hero__content { position: relative; z-index: 2; color: #fff; max-width: 760px; }
.hero__content h1 { font-weight: 800; letter-spacing: -.025em; line-height: 1.08; }
.hero__content p.lead { color: rgba(255,255,255,.85); }
.hero__tagline {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .45rem 1rem;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  font-size: .9rem;
  backdrop-filter: blur(6px);
}
.hero__scroll {
  position: absolute;
  bottom: 1.5rem; left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,.75);
  z-index: 2;
  animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,10px); } }

/* ---------- Cards ---------- */
.card {
  border: 1px solid var(--bs-border-color);
  border-radius: var(--seml-radius);
  box-shadow: var(--seml-shadow);
  transition: transform .28s ease, box-shadow .28s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--seml-shadow-lg); }
.card .card-title { font-weight: 700; }
.card-body > .bi { font-size: 2rem; color: var(--seml-accent); }

.service-card { height: 100%; }
.service-card .icon-badge {
  width: 58px; height: 58px;
  display: grid; place-items: center;
  font-size: 1.5rem;
  color: #fff;
  background: var(--seml-gradient);
  border-radius: 1rem;
  margin-bottom: 1rem;
  transition: transform .28s ease;
}
.service-card:hover .icon-badge { transform: rotate(-8deg) scale(1.08); background: var(--seml-accent); }
.service-card .stretched-link::after { inset: 0; }

/* ---------- Stats ---------- */
.stats-wrap {
  background: var(--seml-gradient);
  border-radius: calc(var(--seml-radius) * 1.4);
  color: #fff;
  padding: 3rem 1.5rem;
  box-shadow: var(--seml-shadow-lg);
}
.stat-value {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--seml-accent);
  line-height: 1;
}
.stat-label { color: rgba(255,255,255,.8); font-weight: 500; margin-top: .4rem; }

/* ---------- Testimonials ---------- */
.testimonial-card {
  border-radius: var(--seml-radius);
  border: 1px solid var(--bs-border-color);
  background: var(--bs-body-bg);
  padding: 1.75rem;
  height: 100%;
}
.testimonial-card .quote-icon { font-size: 2rem; color: var(--seml-accent); }
.testimonial-card img { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; }
.testimonial-card .stars { color: #f7b500; letter-spacing: .1em; }

/* ---------- Partners ---------- */
.partner-logo {
  height: 64px;
  width: 160px;
  object-fit: contain;
  filter: grayscale(1);
  opacity: .72;
  transition: filter .3s, opacity .3s, transform .3s;
}
.partner-logo:hover { filter: none; opacity: 1; transform: scale(1.06); }

/* ---------- Page header (inner pages) ---------- */
.page-hero {
  position: relative;
  background: var(--seml-gradient);
  color: #fff;
  padding: 6.5rem 0 4.5rem;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  right: -120px; top: -120px;
  width: 380px; height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,120,70,.35), transparent 65%);
}
.page-hero h1 { font-weight: 800; letter-spacing: -.02em; position: relative; z-index: 1; }
.page-hero .breadcrumb { position: relative; z-index: 1; }
.page-hero .breadcrumb a { color: rgba(255,255,255,.75); }
.page-hero .breadcrumb a:hover { color: var(--seml-accent); }
.page-hero .breadcrumb-item.active { color: rgba(255,255,255,.95); }
.page-hero .breadcrumb-item + .breadcrumb-item::before { color: rgba(255,255,255,.5); }

/* ---------- Forms ---------- */
.form-control, .form-select {
  min-height: 48px;
  border-radius: .65rem;
}
.form-control:focus, .form-select:focus {
  border-color: var(--seml-accent);
  box-shadow: var(--seml-ring);
}
textarea.form-control { min-height: 120px; }
.form-label { font-weight: 600; font-size: .92rem; margin-bottom: .35rem; }
.input-group-text { background: var(--bs-tertiary-bg); border-color: var(--bs-border-color); }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--seml-gradient);
  border-radius: calc(var(--seml-radius) * 1.4);
  color: #fff;
  padding: 3.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--seml-shadow-lg);
}
.cta-band::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 15%, rgba(255,120,70,.35), transparent 45%);
}
.cta-band > * { position: relative; }

/* ---------- Footer ---------- */
.site-footer { background: #070726; color: rgba(255,255,255,.72); }
.site-footer h6 { color: #fff; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: .82rem; }
.site-footer a { color: rgba(255,255,255,.72); }
.site-footer a:hover { color: var(--seml-accent); }
.site-footer .social-link {
  width: 38px; height: 38px;
  display: inline-grid; place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  transition: background .2s, transform .2s;
}
.site-footer .social-link:hover { background: var(--seml-accent); transform: translateY(-3px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.10); }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 1.25rem; bottom: 1.25rem;
  width: 46px; height: 46px;
  border: none;
  border-radius: 50%;
  background: var(--seml-accent);
  color: #fff;
  display: grid; place-items: center;
  box-shadow: 0 10px 24px rgba(255,120,70,.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: .3s;
  z-index: 1040;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { background: var(--seml-accent-dark); }

/* ---------- Reveal-on-scroll (progressive enhancement) ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- Tabs (register page) ---------- */
.nav-tabs .nav-link { font-weight: 600; color: var(--bs-secondary-color); }
.nav-tabs .nav-link.active { color: var(--seml-accent); border-color: var(--bs-border-color) var(--bs-border-color) var(--bs-body-bg); }
.nav-tabs .nav-link.active::after { background: var(--seml-accent); }

/* ---------- Content typography ---------- */
.prose h2, .prose h3 { font-weight: 700; margin-top: 1.8rem; }
.prose p { margin-bottom: 1.1rem; line-height: 1.75; color: var(--bs-body-color); }
.prose ul { padding-left: 1.2rem; margin-bottom: 1.1rem; }
.prose li { margin-bottom: .45rem; line-height: 1.7; }

/* ---------- Alert refinements ---------- */
.alert { border-radius: .75rem; border-width: 1px; }

/* ---------- Animations ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll { animation: none; }
  .card:hover { transform: none; }
}