/* ============================================================
   CorePal Components
   Reusable BEM blocks: nav, footer, btn, hero, cards, bands, cta
   ============================================================ */

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  white-space: nowrap;
  transition:
    background var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    transform var(--transition-fast),
    box-shadow var(--transition-base);
  cursor: pointer;
  border: 1.5px solid transparent;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

/* Filled blue */
.btn--primary {
  background: var(--color-primary-500);
  color: var(--color-text-invert);
  border-color: var(--color-primary-500);
}
.btn--primary:hover {
  background: var(--color-primary-600);
  border-color: var(--color-primary-600);
  box-shadow: var(--shadow-md);
}

/* Outlined on dark background */
.btn--outline-white {
  background: transparent;
  color: var(--color-text-invert);
  border-color: var(--color-text-invert);
}
.btn--outline-white:hover {
  background: var(--color-text-invert);
  color: var(--color-neutral-900);
}

/* Outlined on light background */
.btn--outline-dark {
  background: transparent;
  color: var(--color-neutral-900);
  border-color: var(--color-neutral-900);
}
.btn--outline-dark:hover {
  background: var(--color-neutral-900);
  color: var(--color-text-invert);
}

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

/* Dark variant: transparent over dark hero, turns opaque on scroll */
.nav--dark {
  background: transparent;
}
.nav--dark.nav--scrolled {
  background: rgba(10, 10, 10, 0.95);
  box-shadow: 0 1px 0 rgba(255,255,255,0.08);
  /* backdrop-filter omitted: placing it on <nav> makes <nav> a containing
     block for position:fixed children (.nav__menu), collapsing the mobile
     menu to zero height. Background at 0.95 opacity is visually equivalent. */
}

/* Light variant: white on pages without dark hero */
.nav--light {
  background: var(--color-bg-body);
  box-shadow: 0 1px 0 var(--color-border);
}
.nav--light.nav--scrolled {
  background: rgba(255, 255, 255, 0.98);
}

.nav__container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--section-px);
  display: flex;
  align-items: center;
}

.nav__logo { flex-shrink: 0; }
.nav__logo img { height: 40px; width: auto; }

/* Desktop menu */
.nav__menu {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: var(--space-8);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: opacity var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Dark nav: white links */
.nav--dark .nav__link { color: var(--color-text-invert); }
.nav--dark .nav__link:hover { opacity: 0.7; }

/* Light nav: dark links */
.nav--light .nav__link { color: var(--color-text-primary); }
.nav--light .nav__link:hover { opacity: 0.65; }

/* Contact button in nav */
.nav__cta {
  padding: 0.4rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border: 1.5px solid currentColor;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}
.nav__cta:hover { transform: translateY(-1px); }

.nav--dark .nav__cta {
  color: var(--color-text-invert);
  border-color: var(--color-text-invert);
}
.nav--dark .nav__cta:hover {
  background: var(--color-text-invert);
  color: var(--color-neutral-900);
}
.nav--light .nav__cta {
  color: var(--color-neutral-800);
  border-color: var(--color-neutral-800);
}
.nav--light .nav__cta:hover {
  background: var(--color-neutral-800);
  color: var(--color-text-invert);
}

/* Dropdown */
.nav__item { position: relative; }

.nav__caret {
  display: inline-block;
  font-size: 0.6em;
  transition: transform var(--transition-fast);
}
.nav__item:hover .nav__caret,
.nav__item:focus-within .nav__caret { transform: rotate(180deg); }

.nav__dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background: var(--color-bg-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2) 0;
  min-width: 176px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}
.nav__item:hover .nav__dropdown,
.nav__item.is-hover .nav__dropdown,
.nav__item:focus-within .nav__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav__dropdown a {
  display: block;
  padding: var(--space-2) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav__dropdown a:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text-brand);
}

/* Mobile hamburger toggle (hidden on desktop) */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  margin-left: auto;
  padding: var(--space-2);
  width: 36px;
  height: 36px;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.nav--dark .nav__toggle span { background: var(--color-text-invert); }
.nav--light .nav__toggle span { background: var(--color-neutral-800); }

/* Hamburger → X animation */
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile breakpoint ──────────────────────────────────────── */
@media (max-width: 767px) {
  .nav__toggle { display: flex; }
  .nav__menu {
    position: fixed;
    inset: var(--nav-height) 0 0 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: var(--space-8) var(--section-px);
    gap: var(--space-2);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
  }
  .nav--dark .nav__menu  { background: var(--color-bg-darkest); }
  .nav--light .nav__menu { background: var(--color-bg-body); }

  .nav__menu.is-open { transform: translateX(0); z-index: var(--z-modal); }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
    width: 100%;
  }
  .nav__item { width: 100%; }

  .nav__link {
    font-size: var(--font-size-xl);
    padding: var(--space-3) 0;
    width: 100%;
  }
  .nav--light .nav__link { color: var(--color-text-primary); }

  /* Dropdown becomes inline accordion */
  .nav__dropdown {
    position: static;
    transform: none !important;
    opacity: 1;
    pointer-events: auto;
    box-shadow: none;
    border: none;
    padding: 0 0 0 var(--space-4);
    background: transparent;
    display: none;
  }
  .nav__item.is-open .nav__dropdown { display: block; }
  .nav__dropdown a {
    font-size: var(--font-size-base);
    padding: var(--space-2) 0;
    color: rgba(255,255,255,0.75);
  }
  .nav--light .nav__menu .nav__dropdown a { color: var(--color-text-secondary); }

  .nav__cta { margin-top: var(--space-4); align-self: flex-start; }
  .nav--dark .nav__cta  { color: var(--color-text-invert); border-color: var(--color-text-invert); }
  .nav--light .nav__cta { color: var(--color-neutral-800); border-color: var(--color-neutral-800); }
}

/* ── Footer ─────────────────────────────────────────────────── */
.footer {
  background: var(--color-bg-darkest);
  color: var(--color-text-invert);
}

.footer__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--section-px);
  padding-block: var(--space-12);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-16);
  align-items: start;
}

.footer__logo { height: 44px; width: auto; }

.footer__addresses {
  display: flex;
  gap: var(--space-16);
  flex-wrap: wrap;
  align-items: flex-start;
}

.footer__office p {
  font-size: var(--font-size-sm);
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.6);
}

.footer__region {
  font-size: var(--font-size-xs) !important;
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-label);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.95) !important;
  margin-bottom: var(--space-1);
}

.footer__copy {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.footer__copy-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--section-px);
  padding-block: var(--space-4);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.35);
}

@media (max-width: 767px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .footer__addresses { gap: var(--space-8); flex-direction: column; }
}

/* ── Hero Base ──────────────────────────────────────────────── */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}
/* Dark overlay gradient left-to-right */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    rgba(0, 0, 0, 0.82) 0%,
    rgba(0, 0, 0, 0.55) 55%,
    rgba(0, 0, 0, 0.20) 100%
  );
}

.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
}

/* ── Feature Cards (on blue band) ───────────────────────────── */
.feature-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.feature-card__icon {
  width: 36px;
  height: 36px;
  margin-bottom: var(--space-5);
  opacity: 0.85;
}

.feature-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-invert);
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-3);
}

.feature-card__body {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.65);
  line-height: var(--line-height-relaxed);
}

/* ── Pain Point Grid ────────────────────────────────────────── */
.pain-grid {
  display: grid;
  gap: var(--space-8);
}
.pain-grid--3 { grid-template-columns: repeat(3, 1fr); }
.pain-grid--2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 767px) {
  .pain-grid--3,
  .pain-grid--2 { grid-template-columns: 1fr; }
}

.pain-item__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-3);
  text-align: center;
}

.pain-item__body {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  text-align: center;
}

/* ── Step Cards (numbered) ──────────────────────────────────── */
.steps-grid {
  display: grid;
  gap: var(--space-6);
}
.steps-grid--4 { grid-template-columns: repeat(4, 1fr); }
.steps-grid--3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 1023px) {
  .steps-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .steps-grid--3 { grid-template-columns: repeat(2, 1fr); }  /* or 1, adjust as needed */
}
@media (max-width: 639px) {
  .steps-grid--4,
  .steps-grid--3 { grid-template-columns: 1fr; }
}

.step-card {
  background: var(--color-bg-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.step-card__num {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-500);
  margin-bottom: var(--space-4);
}

.step-card__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-brand);
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-3);
}

.step-card__body {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ── Capabilities (on blue band) ────────────────────────────── */
.caps-grid {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 1023px) { .caps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 639px)  { .caps-grid { grid-template-columns: 1fr; } }

.cap-item__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-invert);
  margin-bottom: var(--space-3);
}

.cap-item__body {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  line-height: var(--line-height-relaxed);
}

.cap-item__icon {
  width: 80px;
  height: 80px;
  margin-top: var(--space-8);
  opacity: 0.5;
}

/* ── Use Case Card ──────────────────────────────────────────── */
.usecase-card { display: block; }

.usecase-card__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  display: block;
  margin-bottom: var(--space-4);
}

.usecase-card__date {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  background: var(--color-neutral-900);
  color: var(--color-text-invert);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.usecase-card__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-snug);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

/* ── Blue Feature Band ──────────────────────────────────────── */
.band {
  background: var(--color-bg-dark);
  padding-block: var(--space-20);
  color: var(--color-text-invert);
}

.band__title {
  font-size: clamp(var(--font-size-2xl), 3.5vw, var(--font-size-4xl));
  font-weight: var(--font-weight-black);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  text-transform: uppercase;
  color: var(--color-text-invert);
  margin-bottom: var(--space-4);
}

.band__body {
  font-size: var(--font-size-base);
  color: rgba(255, 255, 255, 0.65);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-12);
}

/* ── CTA Dark Section ───────────────────────────────────────── */
.cta-section {
  background: var(--color-bg-darkest);
  padding-block: var(--space-20);
}

.cta-section__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--section-px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-10);
  flex-wrap: wrap;
}

.cta-section--centered .cta-section__inner {
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.cta-section__title {
  font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl));
  font-weight: var(--font-weight-black);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  text-transform: uppercase;
  color: var(--color-text-invert);
}

.cta-section__body {
  font-size: var(--font-size-base);
  color: rgba(255, 255, 255, 0.55);
  line-height: var(--line-height-relaxed);
  max-width: 440px;
  margin-top: var(--space-4);
}

.cta-section--centered .cta-section__body {
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

/* ── Scroll Fade-In Animations ──────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in--delay-1 { transition-delay: 0.1s; }
.fade-in--delay-2 { transition-delay: 0.2s; }
.fade-in--delay-3 { transition-delay: 0.3s; }