/* ============================================================
   GOWTHAM ENTERPRISES — style.css
   Light professional industrial theme
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Brand colours — light theme */
  --clr-bg:           #f8fafc;
  --clr-bg-2:         #f1f5f9;
  --clr-bg-card:      #ffffff;
  --clr-bg-card-hover:#f0f9ff;
  --clr-border:       #e2e8f0;
  --clr-border-light: #cbd5e1;

  --clr-primary:      #0ea5e9;
  --clr-primary-dark: #0284c7;
  --clr-primary-light:#e0f2fe;
  --clr-primary-glow: rgba(14, 165, 233, 0.12);
  --clr-accent:       #059669;
  --clr-warn:         #f59e0b;

  --clr-text:         #1e293b;
  --clr-text-muted:   #475569;
  --clr-text-subtle:  #94a3b8;
  --clr-white:        #ffffff;

  /* Hero gradient */
  --clr-hero-bg:      #eff6ff;
  --clr-hero-bg2:     #f0fdf4;

  /* Typography */
  --font-sans:  'Segoe UI', system-ui, -apple-system, Arial, sans-serif;
  --font-mono:  'Courier New', Courier, monospace;

  /* Spacing */
  --space-xs:   0.5rem;
  --space-sm:   1rem;
  --space-md:   1.5rem;
  --space-lg:   2.5rem;
  --space-xl:   4rem;
  --space-2xl:  6rem;

  /* Radii */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;

  /* Transitions */
  --ease:       0.25s ease;

  /* Layout */
  --container:  1160px;
  --header-h:   68px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg:  0 8px 32px rgba(14,165,233,0.10), 0 2px 8px rgba(0,0,0,0.05);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
}

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

a {
  color: var(--clr-primary);
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ---------- Container ---------- */
.container {
  width: min(var(--container), 100% - 2rem);
  margin-inline: auto;
}

/* ---------- Shared Section Styles ---------- */
.section-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--clr-text-muted);
  max-width: 54ch;
  margin-inline: auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  padding: 0.7em 1.7em;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--ease), color var(--ease), border-color var(--ease), box-shadow var(--ease), transform var(--ease);
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--clr-primary);
  color: #fff;
  border-color: var(--clr-primary);
  box-shadow: 0 2px 8px rgba(14,165,233,0.2);
}

.btn--primary:hover {
  background: var(--clr-primary-dark);
  border-color: var(--clr-primary-dark);
  box-shadow: 0 4px 18px rgba(14,165,233,0.35);
  transform: translateY(-1px);
}

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

.btn--outline:hover {
  background: var(--clr-primary-light);
  box-shadow: 0 2px 12px rgba(14,165,233,0.15);
  transform: translateY(-1px);
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(248, 250, 252, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--ease);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1rem;
  font-weight: 800;
  color: var(--clr-text);
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.logo-text--accent {
  color: var(--clr-primary);
}

/* Desktop nav */
.nav__list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav__link {
  display: block;
  padding: 0.45em 0.9em;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  text-decoration: none;
  transition: color var(--ease), background var(--ease);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0.9em;
  right: 0.9em;
  height: 2px;
  background: var(--clr-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--ease);
}

.nav__link:hover,
.nav__link.active {
  color: var(--clr-primary-dark);
  background: var(--clr-primary-light);
}

.nav__link.active::after,
.nav__link:hover::after {
  transform: scaleX(1);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0.4rem;
  background: transparent;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--ease), background var(--ease);
  flex-shrink: 0;
}

.hamburger:hover {
  background: var(--clr-primary-light);
  border-color: var(--clr-primary);
}

.hamburger:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 2px;
}

.hamburger__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--clr-text-muted);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease), background var(--ease);
  transform-origin: center;
}

.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--clr-primary);
}

.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--clr-primary);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-lg);
  padding-block: var(--space-2xl);
  overflow: hidden;
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 50%, #f8fafc 100%);
}

/* Subtle grid pattern */
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero__circuit {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(14, 165, 233, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(180deg, transparent, rgba(0,0,0,0.5) 20%, rgba(0,0,0,0.5) 80%, transparent);
  -webkit-mask-image: linear-gradient(180deg, transparent, rgba(0,0,0,0.5) 20%, rgba(0,0,0,0.5) 80%, transparent);
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clr-primary-dark);
  background: var(--clr-primary-light);
  border: 1px solid rgba(14, 165, 233, 0.25);
  padding: 0.3em 0.9em;
  border-radius: 999px;
  margin-bottom: 1.2rem;
}

.hero__heading {
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--clr-text);
  margin-bottom: 0.6rem;
  letter-spacing: 0.01em;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  font-weight: 600;
  color: var(--clr-primary-dark);
  margin-bottom: 1rem;
}

.hero__desc {
  font-size: 1rem;
  color: var(--clr-text-muted);
  max-width: 46ch;
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero__illustration {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 6s ease-in-out infinite;
}

.hero-svg {
  width: 100%;
  max-width: 460px;
  filter: drop-shadow(0 8px 24px rgba(14, 165, 233, 0.10));
}

@keyframes float {
  0%, 100% { transform: translateY(0);    }
  50%       { transform: translateY(-10px); }
}

/* ============================================================
   SERVICES
   ============================================================ */
.services {
  padding-block: var(--space-2xl);
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: var(--space-md);
}

/* Service card */
.service-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), #38bdf8);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.service-card:hover {
  border-color: var(--clr-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.service-card__icon-wrap {
  width: 72px;
  height: 72px;
  background: var(--clr-primary-light);
  border: 1px solid rgba(14,165,233,0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
  flex-shrink: 0;
  transition: background var(--ease), border-color var(--ease);
}

.service-card:hover .service-card__icon-wrap {
  background: #bae6fd;
  border-color: var(--clr-primary);
}

.service-icon {
  width: 44px;
  height: 44px;
}

.service-card__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.service-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.3;
}

.service-card__desc {
  color: var(--clr-text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  flex: 1;
}

.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.tag {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--clr-primary-dark);
  background: var(--clr-primary-light);
  border: 1px solid rgba(14,165,233,0.25);
  padding: 0.2em 0.75em;
  border-radius: 999px;
  transition: background var(--ease), border-color var(--ease);
}

.service-card:hover .tag {
  background: #bae6fd;
  border-color: var(--clr-primary);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  padding-block: var(--space-2xl);
  background: var(--clr-bg-2);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--clr-border);
  background: var(--clr-bg-card);
  box-shadow: var(--shadow-md);
}

.about-svg {
  width: 100%;
  height: auto;
}

.about__text .section-title {
  text-align: left;
}

.about__text .section-eyebrow {
  text-align: left;
}

.about__para {
  color: var(--clr-text-muted);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.about__para:last-of-type {
  margin-bottom: 1.75rem;
}

/* ============================================================
   WHY CHOOSE US
   ============================================================ */
.why {
  padding-block: var(--space-2xl);
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.why__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: var(--space-md);
}

.why-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.why-card:hover {
  border-color: var(--clr-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.why-card__icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
}

.why-card__icon svg {
  width: 100%;
  height: 100%;
}

.why-card__title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.35;
}

.why-card__desc {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  line-height: 1.65;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  padding-block: var(--space-2xl);
  background: var(--clr-bg-2);
}

.contact__inner {
  text-align: center;
}

.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
  text-align: left;
}

.contact-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.contact-card:hover {
  border-color: var(--clr-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.contact-card__icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  max-width: 40px;
  flex-shrink: 0;
}

.contact-card__icon svg {
  width: 40px;
  height: 40px;
  display: block;
}

.contact-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.contact-card__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-primary-dark);
}

.contact-card__value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--clr-text);
  text-decoration: none;
  transition: color var(--ease);
  word-break: break-all;
  overflow-wrap: break-word;
}

a.contact-card__value:hover {
  color: var(--clr-primary-dark);
  text-decoration: underline;
}

.contact-card__address {
  font-style: normal;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--clr-text);
  line-height: 1.6;
}

.contact-card__sub {
  font-size: 0.82rem;
  color: var(--clr-text-subtle);
  margin-top: 0.15rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--clr-bg-2);
  border-top: 2px solid var(--clr-border);
  padding-block: var(--space-lg);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer__name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--clr-text);
  letter-spacing: 0.02em;
}

.footer__tagline {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

.footer__nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer__nav a {
  font-size: 0.88rem;
  color: var(--clr-text-muted);
  text-decoration: none;
  transition: color var(--ease);
}

.footer__nav a:hover {
  color: var(--clr-primary-dark);
}

.footer__copy {
  font-size: 0.82rem;
  color: #64748b;
}

/* ============================================================
   OUR PROJECTS
   ============================================================ */
.projects {
  padding-block: var(--space-2xl);
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: var(--space-md);
}

/* Project card */
.project-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.project-card:hover {
  border-color: var(--clr-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

/* Top coloured accent bar */
.project-card::before {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), #38bdf8);
}

.project-card__header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.1rem 1.25rem 1rem;
  border-bottom: 1px solid var(--clr-border);
  background: var(--clr-bg-2);
}

.project-card__logo {
  width: 80px;
  min-width: 80px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 4px 6px;
  overflow: hidden;
}

.project-card__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.project-card__client {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.3;
}

.project-card__location {
  font-size: 0.78rem;
  color: var(--clr-primary-dark);
  font-weight: 500;
  margin-top: 0.1rem;
}

/* Project list */
.project-card__list {
  padding: 1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1;
}

.project-item {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
}

.project-item__num {
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--clr-primary-dark);
  background: var(--clr-primary-light);
  border: 1px solid rgba(14,165,233,0.2);
  border-radius: 4px;
  padding: 0.15em 0.45em;
  margin-top: 0.15rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.03em;
}

.project-item__text {
  font-size: 0.88rem;
  color: var(--clr-text-muted);
  line-height: 1.55;
}

/* ============================================================
   RESPONSIVE — TABLET & MOBILE
   ============================================================ */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-block: var(--space-xl);
  }

  .hero__desc {
    margin-inline: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__illustration {
    order: -1;
  }

  .hero-svg {
    max-width: 340px;
    margin-inline: auto;
  }

  .about {
    background: var(--clr-bg);
  }

  .about__inner {
    grid-template-columns: 1fr;
  }

  .about__text .section-title,
  .about__text .section-eyebrow {
    text-align: center;
  }

  .about__para {
    text-align: center;
  }

  .about__text {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 640px) {
  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(248, 250, 252, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--clr-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-sm) 0;
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    z-index: 99;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: 0 var(--space-sm);
    gap: 0.25rem;
  }

  .nav__link {
    padding: 0.7em 1em;
    font-size: 1rem;
    color: var(--clr-text-muted);
  }

  .nav__link::after {
    display: none;
  }

  .why__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 400px) {
  .why__grid {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    text-align: center;
  }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}