/* ═══════════════════════════════════════════════════════
   STEINKERNEL SYSTEMS — Components
   ═══════════════════════════════════════════════════════ */

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.875rem 2rem;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--border-radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--deep-navy);
  color: var(--white);
  border: 1px solid rgba(102, 155, 188, 0.4);
  box-shadow: 0 4px 14px rgba(0, 48, 73, 0.35);
}

.btn--primary:hover {
  background-color: #002235;
  border-color: var(--warm-amber);
  box-shadow: 0 6px 24px rgba(0, 48, 73, 0.45), 0 0 14px rgba(252, 163, 17, 0.28);
  transform: translateY(-2px);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  background-color: transparent;
  color: var(--white);
  border: 1px solid rgba(253, 240, 213, 0.4);
}

.btn--secondary:hover {
  border-color: var(--warm-cream);
  color: var(--warm-cream);
  background-color: rgba(253, 240, 213, 0.08);
}

.btn--dark {
  background-color: var(--charcoal);
  color: var(--white);
}

.btn--dark:hover {
  background-color: var(--deep-slate);
  transform: translateY(-2px);
}

.btn--navy {
  background-color: var(--navy);
  color: var(--white);
  box-shadow: 0 2px 12px rgba(27, 42, 74, 0.25);
}

.btn--navy:hover {
  background-color: var(--navy-light);
  box-shadow: 0 4px 20px rgba(27, 42, 74, 0.35);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--navy);
  padding: 0.5rem 0;
  text-transform: none;
  letter-spacing: 0;
  font-size: var(--text-base);
  font-weight: 600;
}

.btn--ghost:hover {
  color: var(--strong-red);
}

.btn--ghost::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--strong-red);
  transition: width var(--duration-normal) var(--ease-out);
}

.btn--ghost:hover::after {
  width: 100%;
}

.solution-item--dark .btn--ghost,
.section--dark .btn--ghost {
  color: var(--navy-ice);
}

.solution-item--dark .btn--ghost::after,
.section--dark .btn--ghost::after {
  background-color: var(--navy-ice);
}

.btn--ghost .arrow {
  transition: transform var(--duration-fast) var(--ease-out);
}

.btn--ghost:hover .arrow {
  transform: translateX(4px);
}

.btn--large {
  padding: 1.125rem 2.75rem;
  font-size: var(--text-base);
}

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: 1.25rem 0;
  transition: all var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  padding: 0.75rem 0;
  background: rgba(2, 32, 62, 0.9);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border-bottom: 1px solid rgba(151, 184, 214, 0.16);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: var(--tracking-tight);
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.nav__logo-mark {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  background: #02203E;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1.5px solid rgba(142, 172, 223, 0.32);
  box-shadow: 0 2px 10px rgba(2, 32, 62, 0.45);
  flex-shrink: 0;
  transition: transform var(--duration-fast), border-color var(--duration-fast);
}

.nav__logo:hover .nav__logo-mark {
  transform: scale(1.04);
  border-color: rgba(142, 172, 223, 0.55);
}

.nav__logo-mark img,
.nav__logo-img {
  width: 90%;
  height: 90%;
  object-fit: cover;
  object-position: 50% 38%;
  transform: scale(1.2);
  transform-origin: 50% 38%;
  display: block;
}

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

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: var(--white);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #608EB7, var(--navy-ice));
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__cta {
  margin-left: var(--space-md);
}

/* ─── Mobile Nav Toggle ─── */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  z-index: calc(var(--z-nav) + 10);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ─── Mobile Menu ─── */
.nav__mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--charcoal);
  z-index: var(--z-nav);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-slow) var(--ease-out);
}

.nav__mobile-menu.open {
  opacity: 1;
  visibility: visible;
}

.nav__mobile-menu .nav__link {
  font-size: var(--text-2xl);
  font-family: var(--font-display);
  color: var(--white);
  opacity: 0;
  transform: translateY(24px);
  transition: all var(--duration-slow) var(--ease-out);
}

.nav__mobile-menu.open .nav__link {
  opacity: 1;
  transform: translateY(0);
}

.nav__mobile-menu.open .nav__link:nth-child(1) {
  transition-delay: 100ms;
}

.nav__mobile-menu.open .nav__link:nth-child(2) {
  transition-delay: 180ms;
}

.nav__mobile-menu.open .nav__link:nth-child(3) {
  transition-delay: 260ms;
}

.nav__mobile-menu.open .nav__link:nth-child(4) {
  transition-delay: 340ms;
}

.nav__mobile-menu.open .nav__link:nth-child(5) {
  transition-delay: 420ms;
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .nav__cta {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }
}

/* ─── Solution Cards ─── */
.solution-card {
  position: relative;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.solution-card__number {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--strong-red);
  margin-bottom: var(--space-sm);
}

.solution-item--dark .solution-card__number,
.section--dark .solution-card__number {
  color: #FF6B6B;
}

.solution-card__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.solution-card__desc {
  color: var(--steel);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-md);
}

.section--dark .solution-card__desc {
  color: rgba(255, 255, 255, 0.72);
}

.solution-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

/* ─── Pills / Tags ─── */
.pill {
  display: inline-block;
  padding: 0.28rem 0.75rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: 100px;
  background: #F1F5F9;
  color: #334155;
  border: 1px solid #E2E8F0;
  white-space: nowrap;
}

.pill--copper,
.pill--navy {
  background: rgba(0, 48, 73, 0.08);
  color: var(--deep-navy);
  border: 1px solid rgba(0, 48, 73, 0.2);
}

.pill--burgundy {
  background: rgba(120, 0, 0, 0.08);
  color: var(--deep-burgundy);
  border: 1px solid rgba(120, 0, 0, 0.22);
}

.pill--red {
  background: rgba(193, 18, 31, 0.08);
  color: var(--strong-red);
  border: 1px solid rgba(193, 18, 31, 0.22);
}

.pill--blue {
  background: rgba(102, 155, 188, 0.16);
  color: var(--deep-navy);
  border: 1px solid rgba(102, 155, 188, 0.35);
}

.pill--amber {
  background: rgba(252, 163, 17, 0.14);
  color: #8A5200;
  border: 1px solid rgba(252, 163, 17, 0.35);
}

.pill--cream {
  background: var(--warm-cream);
  color: var(--deep-navy);
  border: 1px solid rgba(0, 48, 73, 0.18);
}

.pill--teal {
  background: var(--teal-soft);
  color: var(--teal);
}

.section--dark .pill {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.section--dark .pill--navy,
.section--dark .pill--copper {
  background: rgba(0, 48, 73, 0.45);
  color: var(--navy-ice);
  border: 1px solid rgba(102, 155, 188, 0.35);
}

.section--dark .pill--blue {
  background: rgba(102, 155, 188, 0.2);
  color: #BDE0FE;
  border: 1px solid rgba(102, 155, 188, 0.4);
}

.section--dark .pill--amber {
  background: rgba(252, 163, 17, 0.18);
  color: #FFD166;
  border: 1px solid rgba(252, 163, 17, 0.4);
}

/* ─── Solution Visual Media & Image Frames ─── */
.solution-card__media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background: #0E1524;
  border: 1px solid rgba(0, 48, 73, 0.12);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.solution-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform var(--duration-normal) var(--ease-out);
}

.solution-item:hover .solution-card__img {
  transform: scale(1.03);
}

/* ─── Image Placeholders ─── */
.img-placeholder {
  position: relative;
  width: 100%;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 300px;
}

.img-placeholder--landscape {
  aspect-ratio: 16 / 10;
}

.img-placeholder--square {
  aspect-ratio: 1;
}

.img-placeholder--tall {
  aspect-ratio: 3 / 4;
}

.img-placeholder__gradient {
  position: absolute;
  inset: 0;
  opacity: 0.08;
}

.img-placeholder__bg-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(198, 120, 50, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(26, 154, 139, 0.06) 0%, transparent 50%);
  background-size: 100% 100%;
}

.img-placeholder__label {
  position: relative;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--steel);
  padding: var(--space-sm) var(--space-md);
  border: 1px dashed var(--mist);
  border-radius: var(--border-radius-sm);
  background: rgba(255, 255, 255, 0.7);
}

.img-placeholder__note {
  position: relative;
  z-index: 2;
  margin-top: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--steel);
  font-style: italic;
  max-width: 280px;
}

/* Placeholder Color Variants */
.img-placeholder--copper {
  background: linear-gradient(135deg, #FDF0D5 0%, #F5E5C4 100%);
  border: 1px solid rgba(0, 48, 73, 0.08);
}

.img-placeholder--teal {
  background: linear-gradient(135deg, #FAF2E6 0%, #F0E0D6 100%);
  border: 1px solid rgba(120, 0, 0, 0.08);
}

.img-placeholder--blue {
  background: linear-gradient(135deg, #EAF2F8 0%, #D8E7F2 100%);
  border: 1px solid rgba(102, 155, 188, 0.2);
}

.img-placeholder--dark {
  background: linear-gradient(135deg, #003049 0%, #001A28 100%);
  border: 1px solid rgba(102, 155, 188, 0.25);
}

.img-placeholder--dark .img-placeholder__label {
  color: #FDF0D5;
  border-color: rgba(253, 240, 213, 0.3);
  background: rgba(0, 48, 73, 0.6);
}

.img-placeholder--dark .img-placeholder__note {
  color: rgba(253, 240, 213, 0.6);
}

.img-placeholder--warm {
  background: linear-gradient(135deg, var(--warm-cream) 0%, #F5E8D0 100%);
  border: 1px solid rgba(0, 48, 73, 0.08);
}

/* ─── Divider ─── */
.divider {
  width: 100%;
  height: 1px;
  background: var(--mist);
  border: none;
}

.section--dark .divider {
  background: rgba(255, 255, 255, 0.08);
}

/* ─── Accent Line ─── */
.accent-line {
  width: 48px;
  height: 3px;
  background: var(--navy);
  border-radius: 2px;
}

/* ─── Bento Grid (Asymmetrical Systems Architecture for "What We Build") ─── */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 240px;
  gap: var(--space-md);
  grid-template-areas:
    "facility facility energy   network"
    "health   software software network"
    "auto     auto     industry network";
}

.bento-item {
  position: relative;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

/* Specific Grid Area Placement */
.bento-item--facility { grid-area: facility; }
.bento-item--energy   { grid-area: energy; }
.bento-item--health   { grid-area: health; }
.bento-item--network  { grid-area: network; }
.bento-item--software { grid-area: software; }
.bento-item--auto     { grid-area: auto; }
.bento-item--industry { grid-area: industry; }

/* Image Media Container */
.bento-item__media,
.bento-item__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background-color: #04162B;
}

.bento-item__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform var(--duration-slow) var(--ease-out), filter var(--duration-normal) var(--ease-out);
}

/* Constant subtle dark tint on image to improve depth & readability */
.bento-item__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(2, 22, 44, 0.28);
  pointer-events: none;
  z-index: 1;
  transition: background var(--duration-normal) var(--ease-out);
}

/* Information Overlay — Visible automatically on Touch/Mobile devices */
.bento-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(2, 22, 44, 0.94) 0%,
    rgba(2, 32, 62, 0.72) 42%,
    rgba(2, 32, 62, 0.16) 75%,
    transparent 100%
  );
  opacity: 1;
  transition: opacity var(--duration-normal) var(--ease-out);
  pointer-events: none;
  z-index: 2;
}

/* Content Container — Visible automatically on Touch/Mobile devices */
.bento-item__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-md);
  color: var(--white);
  transform: translateY(0);
  opacity: 1;
  transition: transform var(--duration-normal) var(--ease-out), opacity var(--duration-normal) var(--ease-out);
  pointer-events: none;
  z-index: 3;
}

.bento-item__label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--navy-ice);
  margin-bottom: 0.25rem;
  display: block;
}

.bento-item__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  line-height: 1.25;
  color: var(--white);
}

.bento-item__desc {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.85);
  margin-top: 0.35rem;
  max-width: 48ch;
}

/* ─── Desktop / Fine-Pointer Hover Experience ─── */
@media (hover: hover) and (pointer: fine) and (min-width: 769px) {
  .bento-item {
    cursor: pointer;
  }

  .bento-item:hover {
    transform: scale(1.02);
    z-index: 4;
  }

  .bento-item:hover .bento-item__img,
  .bento-item:hover .bento-item__bg {
    transform: scale(1.05);
  }

  /* Hidden until hovered on desktop */
  .bento-item__overlay {
    opacity: 0;
  }

  .bento-item:hover .bento-item__overlay,
  .bento-item:focus-within .bento-item__overlay {
    opacity: 1;
  }

  .bento-item__content {
    opacity: 0;
    transform: translateY(14px);
  }

  .bento-item:hover .bento-item__content,
  .bento-item:focus-within .bento-item__content {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Tablet Viewports (Intelligent 2-column reflow) ─── */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 230px;
    gap: var(--space-sm);
    grid-template-areas:
      "facility facility"
      "energy   health"
      "software software"
      "industry network"
      "auto     auto";
  }
}

/* ─── Mobile Viewports (Natural vertical sequence) ─── */
@media (max-width: 768px) {
  .bento-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 240px;
    gap: var(--space-md);
    grid-template-areas: none;
  }

  .bento-item--facility,
  .bento-item--energy,
  .bento-item--health,
  .bento-item--network,
  .bento-item--software,
  .bento-item--auto,
  .bento-item--industry {
    grid-area: auto;
    grid-column: span 1;
    grid-row: span 1;
  }

  .bento-item__content {
    padding: var(--space-sm) var(--space-md);
  }

  .bento-item__desc {
    font-size: 0.8rem;
    line-height: 1.4;
  }
}