/* ============================================================
   ImmersIQ — Design System
   ============================================================ */

/* --- Variables --- */
:root {
  --clr-primary:       hsl(217, 91%, 60%);
  --clr-primary-glow:  hsl(217, 91%, 70%);
  --clr-secondary:     hsl(215, 16%, 47%);
  --clr-accent:        hsl(142, 71%, 45%);
  --clr-accent-glow:   hsl(142, 71%, 55%);
  --clr-background:    hsl(0, 0%, 100%);
  --clr-foreground:    hsl(215, 25%, 27%);
  --clr-muted:         hsl(214, 32%, 91%);
  --clr-muted-fg:      hsl(215, 16%, 47%);
  --clr-border:        hsl(214, 32%, 91%);

  --gradient-hero:    linear-gradient(135deg, hsl(217, 91%, 60%), hsl(142, 71%, 45%));
  --gradient-feature: linear-gradient(180deg, hsl(0, 0%, 100%), hsl(214, 32%, 97%));
  --gradient-card:    linear-gradient(145deg, hsl(0, 0%, 100%), hsl(214, 32%, 98%));

  --shadow-card: 0 4px 20px -4px hsl(217 91% 60% / 0.1);
  --shadow-hero: 0 20px 60px -20px hsl(217 91% 60% / 0.3);
  --shadow-glow: 0 0 40px hsl(217 91% 60% / 0.15);

  --radius:    0.75rem;
  --radius-md: 0.625rem;
  --radius-sm: 0.5rem;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--clr-background);
  color: var(--clr-foreground);
  line-height: 1.6;
}

img { display: block; max-width: 100%; }
a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }
button { font-family: inherit; cursor: pointer; }


/* ============================================================
   Layout
   ============================================================ */
.container {
  width: 100%;
  max-width: 1400px;
  margin-inline: auto;
  padding-inline: 2rem;
}

.section { padding-block: 5rem; }


/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  background-color: hsl(0 0% 100% / 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--clr-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}

.nav__logo img { height: 4rem; }

.nav__links {
  display: none;
  align-items: center;
  gap: 2rem;
}

.nav__links a {
  font-size: 0.9375rem;
  color: var(--clr-foreground);
  transition: var(--transition);
}
.nav__links a:hover { color: var(--clr-primary); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Hamburger button */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 0.25rem;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--clr-foreground);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile drawer */
.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 2rem 1rem;
  border-top: 1px solid var(--clr-border);
  background-color: var(--clr-background);
}
.nav__mobile.open { display: flex; }
.nav__mobile a {
  padding: 0.5rem 0;
  color: var(--clr-foreground);
  font-size: 0.9375rem;
  transition: var(--transition);
}
.nav__mobile a:hover { color: var(--clr-primary); }


/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.btn--ghost {
  background: transparent;
  color: var(--clr-foreground);
  border-color: transparent;
}
.btn--ghost:hover {
  background: var(--clr-muted);
  color: var(--clr-primary);
}

.btn--hero {
  background: var(--gradient-hero);
  color: #fff;
  padding: 0.5rem 1.25rem;
  box-shadow: var(--shadow-card);
}
.btn--hero:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}
.btn--hero .btn__icon { transition: transform 0.3s ease; }
.btn--hero:hover .btn__icon { transform: translateX(4px); }

.btn--outline {
  background: transparent;
  border-color: var(--clr-border);
  color: var(--clr-foreground);
}
.btn--outline:hover {
  background: var(--clr-muted);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}

.btn--lg {
  padding: 0.875rem 2rem;
  font-size: 1.0625rem;
}

.btn--full { width: 100%; justify-content: center; }


/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  border: 1px solid transparent;
}

.badge--secondary {
  background: var(--clr-muted);
  color: var(--clr-muted-fg);
}
.badge--outline {
  border-color: var(--clr-border);
  color: var(--clr-muted-fg);
  background: transparent;
}
.badge--accent-outline {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: transparent;
}
.badge--primary-outline {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: transparent;
}
.badge--secondary-outline {
  border-color: var(--clr-secondary);
  color: var(--clr-secondary);
  background: transparent;
}


/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--gradient-card);
  box-shadow: var(--shadow-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-glow); }

.card__header { padding: 1.5rem 1.5rem 0; }
.card__content { padding: 1.5rem; }

.card__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}
.card__description {
  font-size: 0.9rem;
  color: var(--clr-muted-fg);
  line-height: 1.5;
}


/* ============================================================
   Icon helpers
   ============================================================ */
.icon--primary   { color: var(--clr-primary); }
.icon--accent    { color: var(--clr-accent); }
.icon--secondary { color: var(--clr-secondary); }

.icon-bg {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  padding: 0.75rem;
}
.icon-bg--sm { padding: 0.5rem; }
.icon-bg--round { border-radius: 50%; }
.icon-bg--primary   { background: hsl(217 91% 60% / 0.1); }
.icon-bg--accent    { background: hsl(142 71% 45% / 0.1); }
.icon-bg--secondary { background: hsl(215 16% 47% / 0.1); }


/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-immersive-learning.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero__overlay-dark {
  position: absolute;
  inset: 0;
  background: hsl(0 0% 0% / 0.2);
}
.hero__overlay-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, hsl(0 0% 0% / 0.6), hsl(0 0% 0% / 0.4), transparent);
}

.hero__content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: #fff;
  padding-block: 5rem;
  width: 100%;
}
.hero__inner {
  max-width: 64rem;
  margin-inline: auto;
}

.hero__title {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}
.hero__title-gradient {
  background: linear-gradient(to right, var(--clr-primary-glow), var(--clr-accent-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1.0625rem, 2.5vw, 1.375rem);
  color: hsl(0 0% 100% / 0.9);
  max-width: 46rem;
  margin-inline: auto;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 52rem;
  margin-inline: auto;
}
.hero__stat {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: hsl(0 0% 100% / 0.9);
}
.hero__stat-icon { flex-shrink: 0; }
.hero__stat-value { font-size: 1.5rem; font-weight: 700; }
.hero__stat-label { font-size: 0.875rem; opacity: 0.8; }


/* ============================================================
   Section Header (shared)
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}
.section-header .badge { margin-bottom: 1rem; }

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--clr-foreground);
}
.section-subtitle {
  font-size: 1.125rem;
  color: var(--clr-muted-fg);
  max-width: 46rem;
  margin-inline: auto;
  line-height: 1.7;
}


/* ============================================================
   Features
   ============================================================ */
.features { background: var(--gradient-feature); }

/* Feature cards */
.feature-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 4rem;
}

.feature-card__head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.feature-card__title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.feature-card__desc {
  font-size: 0.9rem;
  color: var(--clr-muted-fg);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.feature-items { display: flex; flex-direction: column; gap: 1rem; }

.feature-item { display: flex; align-items: flex-start; gap: 0.75rem; }
.feature-item__icon { flex-shrink: 0; margin-top: 0.125rem; }
.feature-item__title {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 0.125rem;
}
.feature-item__desc { font-size: 0.8125rem; color: var(--clr-muted-fg); }

/* Visual showcase */
.showcase {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}
.showcase + .showcase { margin-top: 4rem; }

.showcase__content .badge { margin-bottom: 1rem; }
.showcase__title {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.showcase__desc {
  font-size: 1.0625rem;
  color: var(--clr-muted-fg);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}
.showcase__bullets { display: flex; flex-direction: column; gap: 1rem; }
.showcase__bullet {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot--accent   { background: var(--clr-accent); }
.dot--primary  { background: var(--clr-primary); }

.showcase__image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-hero);
  width: 100%;
}


/* ============================================================
   Benefits
   ============================================================ */
.benefits { background: var(--clr-background); }

/* Metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 4rem;
}
.metric-card { text-align: center; }
.metric-card .card__header { padding-bottom: 1rem; }
.metric-card__icon-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 0.75rem;
}
.metric-card__label { font-size: 1rem; font-weight: 600; }
.metric-card__value {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}
.metric-card__desc { font-size: 0.8125rem; color: var(--clr-muted-fg); }

/* Use cases */
.use-cases { margin-bottom: 4rem; }
.use-cases__header {
  text-align: center;
  margin-bottom: 3rem;
}
.use-cases__header .badge { margin-bottom: 1rem; }
.use-cases__title { font-size: 1.875rem; font-weight: 700; margin-bottom: 1rem; }
.use-cases__desc {
  font-size: 1.0625rem;
  color: var(--clr-muted-fg);
  max-width: 40rem;
  margin-inline: auto;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
.use-case {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--gradient-card);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.use-case:hover { box-shadow: var(--shadow-glow); }
.use-case--muted { opacity: 0.75; }
.use-case__title { font-weight: 600; margin-bottom: 0.5rem; }
.use-case__desc {
  font-size: 0.8125rem;
  color: var(--clr-muted-fg);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

/* Compliance */
.compliance {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
  margin-bottom: 4rem;
}
.compliance .badge { margin-bottom: 1rem; }
.compliance__title { font-size: 1.875rem; font-weight: 700; margin-bottom: 1.5rem; }

.compliance-checklist { display: flex; flex-direction: column; gap: 1rem; }
.compliance-item { display: flex; align-items: flex-start; gap: 0.75rem; }
.compliance-item__icon { flex-shrink: 0; margin-top: 0.125rem; color: var(--clr-accent); }
.compliance-item__title { font-weight: 600; font-size: 0.9375rem; margin-bottom: 0.125rem; }
.compliance-item__desc { font-size: 0.8125rem; color: var(--clr-muted-fg); }

.compliance-features { display: flex; flex-direction: column; gap: 1.5rem; }
.compliance-feature {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
}
.compliance-feature__title { font-weight: 600; font-size: 0.9375rem; margin-bottom: 0.125rem; }
.compliance-feature__desc { font-size: 0.8125rem; color: var(--clr-muted-fg); }

/* Benefits CTA */
.benefits-cta { text-align: center; }
.benefits-cta__inner { max-width: 40rem; margin-inline: auto; }
.benefits-cta__title { font-size: 1.875rem; font-weight: 700; margin-bottom: 1rem; }
.benefits-cta__desc { font-size: 1.0625rem; color: var(--clr-muted-fg); margin-bottom: 2rem; }
.benefits-cta__actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: center;
}


/* ============================================================
   Contact
   ============================================================ */
.contact { background: var(--gradient-feature); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 72rem;
  margin-inline: auto;
}

.contact-form__title { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.375rem; }
.contact-form__desc { font-size: 0.9rem; color: var(--clr-muted-fg); margin-bottom: 1.5rem; }

.form-stack { display: flex; flex-direction: column; gap: 1.5rem; }

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.375rem; }

.form-label { font-size: 0.875rem; font-weight: 500; }

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  font-family: inherit;
  background: var(--clr-background);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  color: var(--clr-foreground);
  transition: var(--transition);
  outline: none;
}
.form-input:focus,
.form-textarea:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px hsl(217 91% 60% / 0.15);
}
.form-textarea { resize: vertical; min-height: 7rem; }

.form-success {
  margin-top: 1rem;
  padding: 1rem;
  background: hsl(142 71% 45% / 0.08);
  border: 1px solid var(--clr-accent);
  border-radius: var(--radius-md);
  color: var(--clr-accent);
  font-weight: 500;
  text-align: center;
  font-size: 0.9375rem;
}

/* Contact info sidebar */
.contact-info { display: flex; flex-direction: column; gap: 1.5rem; }

.contact-info-card__title { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.25rem; }
.contact-info-card__desc { font-size: 0.875rem; color: var(--clr-muted-fg); margin-bottom: 1.25rem; }

.contact-detail { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.contact-detail:last-child { margin-bottom: 0; }
.contact-detail__label { font-weight: 500; font-size: 0.9375rem; margin-bottom: 0.125rem; }
.contact-detail__value { font-size: 0.8125rem; color: var(--clr-muted-fg); }

.quick-facts__title { font-size: 1.0625rem; font-weight: 700; margin-bottom: 0.75rem; }
.quick-fact {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  padding-block: 0.375rem;
  border-bottom: 1px solid var(--clr-border);
}
.quick-fact:last-child { border-bottom: none; }
.quick-fact__label { color: var(--clr-muted-fg); }
.quick-fact__value { font-weight: 500; }


/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--clr-background);
  border-top: 1px solid var(--clr-border);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-block: 3rem;
}

.footer__brand-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.footer__brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer__brand-desc { font-size: 0.875rem; color: var(--clr-muted-fg); line-height: 1.6; }

.footer__col-title { font-weight: 600; color: var(--clr-foreground); margin-bottom: 1rem; }

.footer__links { display: flex; flex-direction: column; gap: 0.625rem; }
.footer__links li { display: flex; align-items: center; gap: 0.5rem; }
.footer__links a,
.footer__links span { font-size: 0.875rem; color: var(--clr-muted-fg); transition: var(--transition); }
.footer__links a:hover { color: var(--clr-primary); }

.footer__separator { height: 1px; background: var(--clr-border); }

.footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding-block: 1.5rem;
  text-align: center;
}
.footer__copyright { font-size: 0.875rem; color: var(--clr-muted-fg); }
.footer__policy { display: flex; gap: 1.5rem; flex-wrap: wrap; justify-content: center; }
.footer__policy a { font-size: 0.875rem; color: var(--clr-muted-fg); transition: var(--transition); }
.footer__policy a:hover { color: var(--clr-primary); }


/* ============================================================
   Responsive
   ============================================================ */
@media (min-width: 640px) {
  .hero__stats          { grid-template-columns: repeat(3, 1fr); }
  .form-row             { grid-template-columns: repeat(2, 1fr); }
  .benefits-cta__actions { flex-direction: row; }
}

@media (min-width: 768px) {
  .nav__links           { display: flex; }
  .nav__hamburger       { display: none; }
  .metrics-grid         { grid-template-columns: repeat(2, 1fr); }
  .use-cases-grid       { grid-template-columns: repeat(2, 1fr); }
  .footer__grid         { grid-template-columns: repeat(2, 1fr); }
  .footer__bottom       { flex-direction: row; justify-content: space-between; text-align: left; }
  .footer__policy       { justify-content: flex-start; }
}

@media (min-width: 1024px) {
  .nav__hamburger       { display: none; }
  .feature-cards        { grid-template-columns: repeat(3, 1fr); }
  .showcase             { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid         { grid-template-columns: repeat(4, 1fr); }
  .use-cases-grid       { grid-template-columns: repeat(3, 1fr); }
  .compliance           { grid-template-columns: repeat(2, 1fr); }
  .contact-grid         { grid-template-columns: 2fr 1fr; }
  .footer__grid         { grid-template-columns: repeat(4, 1fr); }
}