/* ==============================================
   Midlands Electronic Solutions — Stylesheet
   ============================================== */

/* 1. Variables & Reset
   ============================================== */
:root {
  --color-bg:          #050c18;
  --color-surface:     #0d1b2a;
  --color-surface-2:   #132133;
  --color-border:      #1e3248;
  --color-accent:      #00c8e8;
  --color-accent-dim:  rgba(0, 200, 232, 0.10);
  --color-accent-glow: rgba(0, 200, 232, 0.35);
  --color-text:        #dde9f5;
  --color-text-muted:  #7a9bb8;
  --color-success:     #22d3a5;
  --color-success-bg:  rgba(34, 211, 165, 0.10);
  --color-error:       #f87171;
  --color-error-bg:    rgba(248, 113, 113, 0.10);

  --font-body:    system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-heading: system-ui, -apple-system, 'Segoe UI', sans-serif;

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 16px;

  --shadow-glow: 0 0 24px var(--color-accent-glow);

  --nav-height: 64px;
  --container:  1200px;
  --gap:        clamp(1rem, 3vw, 2rem);
  --transition: 0.2s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: #fff; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
}

ul[role="list"] { list-style: none; }

/* 2. Layout
   ============================================== */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* 3. Buttons
   ============================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #050c18;
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: #fff;
  border-color: #fff;
  color: #050c18;
  box-shadow: var(--shadow-glow);
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--outline:hover {
  background: var(--color-accent-dim);
  color: #fff;
  border-color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: transparent;
}
.btn--ghost:hover { color: var(--color-accent); }

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

/* 4. Badge
   ============================================== */
.badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge--accent {
  background: var(--color-accent-dim);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

/* 5. Navigation
   ============================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(5, 12, 24, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.site-header--scrolled {
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.5);
}

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  flex-shrink: 0;
}
.nav__logo-mark {
  background: var(--color-accent);
  color: #050c18;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
}
.nav__logo-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition);
}
.nav__logo:hover .nav__logo-name { color: #fff; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav__link {
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition);
  text-decoration: none;
}
.nav__link:hover,
.nav__link--active {
  color: #fff;
  background: var(--color-surface-2);
}
.nav__link--cta {
  background: var(--color-accent-dim);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  margin-left: 0.5rem;
}
.nav__link--cta:hover {
  background: var(--color-accent);
  color: #050c18;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.nav__toggle:hover { background: var(--color-surface-2); }
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}
.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); }

/* 6. Hero
   ============================================== */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-block: clamp(4rem, 8vw, 8rem);
}

.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

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

.hero__title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 480px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* LED graphic */
.led-graphic {
  position: relative;
  width: 280px;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.led-graphic__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--color-accent);
  animation: pulse-ring 3s ease-in-out infinite;
}
.led-graphic__ring--1 { width: 100%; height: 100%; opacity: 0.12; animation-delay: 0s; }
.led-graphic__ring--2 { width: 70%;  height: 70%;  opacity: 0.22; animation-delay: 0.4s; }
.led-graphic__ring--3 { width: 44%;  height: 44%;  opacity: 0.38; animation-delay: 0.8s; }

.led-graphic__core {
  position: relative;
  z-index: 1;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-accent);
  text-shadow: 0 0 30px var(--color-accent-glow);
  background: var(--color-surface);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 40px var(--color-accent-glow), inset 0 0 20px rgba(0,200,232,0.05);
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.05); }
}

/* 7. Sections
   ============================================== */
.section {
  padding-block: clamp(3.5rem, 6vw, 6rem);
}
.section--dark {
  background: var(--color-surface);
}

.section__header {
  text-align: center;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}
.section__title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 0.75rem;
}
.section__subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.7;
}

/* 8. Cards
   ============================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--gap);
}
.card-grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition), transform var(--transition);
}
.section--dark .card {
  background: var(--color-surface-2);
}
.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
}
.card__icon {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}
.card__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.card__body {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* 9. CTA block
   ============================================== */
.cta-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.cta-block__title {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-bottom: 0.5rem;
}
.cta-block__body {
  color: var(--color-text-muted);
  max-width: 480px;
}
.cta-block__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* 10. Page Hero (inner pages)
   ============================================== */
.page-hero {
  padding-block: clamp(3rem, 6vw, 6rem);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.page-hero--sm {
  padding-block: clamp(2rem, 4vw, 4rem);
}

.page-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.page-hero__content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.page-hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
}
.page-hero__subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}
.page-hero__visual {
  display: flex;
  justify-content: center;
}
.product-placeholder {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 4 / 3;
  background: var(--color-surface-2);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 1.5rem;
  font-weight: 700;
}
.product-placeholder small {
  font-size: 0.8rem;
  font-weight: 400;
}

/* 11. Spec table
   ============================================== */
.spec-table-wrap { overflow-x: auto; }

.spec-table {
  width: 100%;
  max-width: 680px;
  margin-inline: auto;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.spec-table th,
.spec-table td {
  padding: 0.9rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.spec-table th[scope="row"] {
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
  width: 42%;
}
.spec-table td { color: var(--color-text); }
.spec-table tr:last-child th,
.spec-table tr:last-child td { border-bottom: none; }

/* 12. Contact page
   ============================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}
.contact-info__title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}
.contact-info__body {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}
.contact-detail-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.contact-detail-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}
.contact-detail-list__icon { flex-shrink: 0; }

/* 13. Forms
   ============================================== */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.form-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
}
.form-label span[aria-hidden="true"] { color: var(--color-accent); }
.form-label--optional {
  color: var(--color-text-muted);
  font-weight: 400;
}
.form-control {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.7rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-dim);
}
.form-control::placeholder {
  color: var(--color-text-muted);
  opacity: 0.6;
}
.form-control--textarea {
  resize: vertical;
  min-height: 150px;
}
.form-group--error .form-control {
  border-color: var(--color-error);
}
.form-group--error .form-control:focus {
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.15);
}
.form-error {
  font-size: 0.82rem;
  color: var(--color-error);
}

/* 14. Alerts
   ============================================== */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid;
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 1.25rem;
}
.alert p + p { margin-top: 0.25rem; }
.alert--success {
  background: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success);
}
.alert--error {
  background: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-error);
}

/* 15. Content (about page)
   ============================================== */
.content-narrow {
  max-width: 760px;
  margin-inline: auto;
}
.content-narrow h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}
.content-narrow p {
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}
.content-narrow ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.content-narrow li {
  color: var(--color-text-muted);
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.65;
}
.content-narrow li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}
.content-narrow strong { color: var(--color-text); }

/* 16. Footer
   ============================================== */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: clamp(3rem, 5vw, 5rem);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: clamp(2rem, 3vw, 3rem);
}
.footer__tagline {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
  line-height: 1.6;
}
.footer__heading {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}
.footer__nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer__nav a {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.footer__nav a:hover { color: #fff; }
.footer__contact p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}
.footer__contact a {
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.footer__contact a:hover { color: var(--color-accent); }
.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-block: 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* 17. Photo Carousel
   ============================================== */
.carousel {
  position: relative;
  width: 100%;
  max-width: 420px;
  margin-inline: auto;
}

.carousel__track-wrap {
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.carousel__track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.carousel__slide {
  flex: 0 0 100%;
  aspect-ratio: 3 / 4;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.carousel__slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 1rem;
}

.carousel__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  background: rgba(5, 12, 24, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text);
  transition: background var(--transition), border-color var(--transition);
}
.carousel__btn:hover {
  background: var(--color-accent-dim);
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.carousel__btn--prev { left: -16px; }
.carousel__btn--next { right: -16px; }

.carousel__dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.9rem;
}
.carousel__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), transform var(--transition);
}
.carousel__dot--active {
  background: var(--color-accent);
  transform: scale(1.3);
}

/* 18. Responsive
   ============================================== */
@media (max-width: 900px) {
  .hero__inner,
  .page-hero__inner {
    grid-template-columns: 1fr;
  }
  .hero__visual { display: none; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav__links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    gap: 0.25rem;
  }
  .nav__links.nav__links--open { display: flex; }
  .nav__toggle { display: flex; }

  .form-row { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .cta-block { flex-direction: column; align-items: flex-start; }
}