/* ==========================================================================
   JMOS Communications Co. Ltd — Main Stylesheet
   Mobile-first responsive design system
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
  --color-navy: #0B1F3A;
  --color-cyan: #06B6D4;
  --color-cyan-text: #0891B2; /* Darker cyan for WCAG AA text contrast (4.5:1 on white) */
  --color-amber: #F2994A;
  --color-text: #334155;
  --color-bg-light: #F5F7FA;
  --color-white: #FFFFFF;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Border radius */
  --radius-btn: 8px;
  --radius-card: 12px;

  /* Transitions */
  --transition-fast: 200ms ease;
}

/* ==========================================================================
   2. CSS Reset / Base Styles
   ========================================================================== */

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

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

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

input,
button,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* ==========================================================================
   3. @font-face Declarations
   ========================================================================== */

/* Space Grotesk — Headings */
@font-face {
  font-family: 'Space Grotesk';
  src: url('../assets/fonts/SpaceGrotesk-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Space Grotesk';
  src: url('../assets/fonts/SpaceGrotesk-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* Manrope — Body text */
@font-face {
  font-family: 'Manrope';
  src: url('../assets/fonts/Manrope-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Manrope';
  src: url('../assets/fonts/Manrope-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Manrope';
  src: url('../assets/fonts/Manrope-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ==========================================================================
   4. Typography
   ========================================================================== */

body {
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--color-navy);
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
}

h3 {
  font-size: 1.3rem;
  font-weight: 500;
}

p {
  margin-bottom: var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   5. Layout Utilities
   ========================================================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

.grid-3 {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

.grid-4 {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

section {
  padding: var(--space-2xl) 0;
}

/* Alternating section backgrounds */
section:nth-of-type(even) {
  background-color: var(--color-bg-light);
}

/* Force dark backgrounds on sections that must always be navy regardless of position */
section.cta-banner,
section.stats {
  background-color: var(--color-navy) !important;
}

/* ==========================================================================
   6. Buttons & CTAs
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

.btn:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-amber);
  color: var(--color-navy);
}

.btn-primary:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 12px rgba(242, 153, 74, 0.4);
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid var(--color-navy);
  color: var(--color-navy);
}

.btn-secondary:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 12px rgba(11, 31, 58, 0.15);
}

/* ==========================================================================
   7. Cards
   ========================================================================== */

.card {
  border-radius: var(--radius-card);
  background-color: var(--color-white);
  padding: var(--space-lg);
  box-shadow: 0 2px 8px rgba(11, 31, 58, 0.06);
  transition: box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: 0 4px 16px rgba(11, 31, 58, 0.1);
}

/* ==========================================================================
   8. Top Ribbon Bar & Header & Navigation
   ========================================================================== */

/* Top Ribbon Bar */
.top-ribbon {
  background-color: var(--color-navy);
  color: var(--color-white);
  font-size: 0.8rem;
  padding: 6px 0;
}

.top-ribbon__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}

.top-ribbon__contact {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.top-ribbon__contact a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.8rem;
  transition: color var(--transition-fast);
}

.top-ribbon__contact a:hover {
  color: var(--color-cyan);
}

.top-ribbon__contact svg {
  flex-shrink: 0;
}

.top-ribbon__social {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.top-ribbon__social a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.top-ribbon__social a:hover {
  color: var(--color-cyan);
}

/* Hide email text on very small screens */
@media (max-width: 479px) {
  .top-ribbon__contact a span.ribbon-label {
    display: none;
  }
  .top-ribbon {
    font-size: 0.75rem;
    padding: 4px 0;
  }
  .top-ribbon__contact {
    gap: var(--space-sm);
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-white);
  box-shadow: 0 2px 8px rgba(11, 31, 58, 0.08);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) 16px;
}

/* Logo */
.site-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  white-space: nowrap;
}

.site-logo__img {
  height: 40px;
  width: auto;
  display: block;
}

.site-logo:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Navigation — Off-canvas mobile menu */
.nav-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background-color: var(--color-white);
  box-shadow: -4px 0 20px rgba(11, 31, 58, 0.15);
  padding: 80px var(--space-lg) var(--space-lg);
  z-index: 999;
  transition: right 0.3s ease;
  overflow-y: auto;
}

.nav-menu.menu-open {
  display: block;
  right: 0;
}

/* Overlay when menu is open */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(11, 31, 58, 0.5);
  z-index: 998;
}

.nav-overlay.active {
  display: block;
}

.nav-list {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.nav-list li {
  border-bottom: 1px solid var(--color-bg-light);
}

.nav-list li:last-child {
  border-bottom: none;
}

.nav-list a {
  display: block;
  padding: var(--space-md) var(--space-lg);
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-list a:hover {
  color: var(--color-cyan-text);
  background-color: var(--color-bg-light);
}

.nav-list a:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: -3px;
  border-radius: 4px;
}

.nav-list a.nav-active {
  color: #0891B2; /* Darker cyan for WCAG AA 4.5:1 contrast on white */
  font-weight: 600;
  position: relative;
}

/* Hamburger toggle button */
.menu-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 44px;
  min-height: 44px;
  padding: var(--space-sm);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-navy);
  border-radius: var(--radius-btn);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.menu-toggle:hover {
  background-color: var(--color-bg-light);
}

.menu-toggle:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 2px;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Animated X state when menu is open */
.menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Desktop nav (768px and up) */
@media (min-width: 768px) {
  .header-container {
    padding: var(--space-md) 32px;
  }

  .menu-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    flex-direction: row;
    position: static;
    width: auto;
    height: auto;
    box-shadow: none;
    padding: 0;
    background-color: transparent;
    overflow-y: visible;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-xs);
  }

  .nav-list li {
    border-bottom: none;
  }

  .nav-list a {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-btn);
  }

  .nav-list a.nav-active {
    border-bottom: 2px solid var(--color-cyan);
    border-radius: 0;
    padding-bottom: calc(var(--space-sm) - 2px);
  }

  .nav-overlay {
    display: none !important;
  }
}

/* ==========================================================================
   9. Footer — Redesigned with Accordion on Mobile
   ========================================================================== */

.site-footer {
  background-color: var(--color-navy);
  color: var(--color-white);
  padding: var(--space-2xl) 0 var(--space-md);
}

/* Footer Top: Brand + Social */
.footer-top {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-lg);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: var(--space-xl);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-logo img {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin: 0;
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--color-cyan);
  transform: scale(1.1);
}

.footer-social a:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 2px;
}

.footer-social svg {
  width: 20px;
  height: 20px;
}

/* Footer Grid Columns */
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.footer-col {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col:last-child {
  border-bottom: none;
}

/* Accordion Toggle (mobile only) */
.footer-col__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-md) 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-white);
}

.footer-col__toggle h3 {
  color: var(--color-white);
  font-size: 1rem;
  margin: 0;
}

.footer-col__arrow {
  transition: transform 0.3s ease;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col__toggle[aria-expanded="true"] .footer-col__arrow {
  transform: rotate(180deg);
}

/* Accordion Content (collapsed by default on mobile) */
.footer-col__content {
  display: none;
  padding-bottom: var(--space-md);
}

.footer-col__toggle[aria-expanded="true"] + .footer-col__content {
  display: block;
}

.footer-col__content address {
  font-style: normal;
  line-height: 1.8;
}

.footer-col__content address a {
  color: var(--color-cyan);
  transition: opacity var(--transition-fast);
}

.footer-col__content address a:hover {
  opacity: 0.8;
}

.footer-col__content ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-services .footer-col__content ul {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.footer-col__content ul li a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
  font-size: 0.9rem;
}

.footer-col__content ul li a:hover {
  color: var(--color-cyan);
}

/* Footer Bottom */
.footer-bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  margin: 0;
}

.footer-credit a {
  color: var(--color-cyan);
  text-decoration: none;
  font-weight: 500;
  transition: opacity var(--transition-fast);
}

.footer-credit a:hover {
  opacity: 0.8;
}

/* Desktop: expand all columns, hide toggles */
@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr 2fr;
    gap: var(--space-2xl);
  }

  .footer-col {
    border-bottom: none;
  }

  .footer-col__toggle {
    pointer-events: none;
    cursor: default;
    padding: 0;
    margin-bottom: var(--space-md);
  }

  .footer-col__arrow {
    display: none;
  }

  .footer-col__content {
    display: block !important;
    padding-bottom: 0;
  }

  .footer-services .footer-col__content ul {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xs) var(--space-lg);
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ==========================================================================
   10. Hero Section — Full-width Image Slider
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Slider background images */
.hero-slider {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-slider__slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}

.hero-slide.active {
  opacity: 1;
}

/* Dark overlay for text contrast */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(11, 31, 58, 0.65) 0%,
    rgba(11, 31, 58, 0.75) 50%,
    rgba(11, 31, 58, 0.8) 100%
  );
  z-index: 1;
}

/* Hero content container */
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: var(--space-2xl) var(--space-lg);
}

@media (min-width: 480px) {
  .hero-content {
    padding: var(--space-3xl) var(--space-xl);
  }
}

/* Hero headline */
.hero-headline {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
  line-height: 1.15;
}

.hero-word {
  display: inline-block;
  margin-right: 0.25em;
}

/* Hero subtitle */
.hero-subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
  max-width: 640px;
}

/* Hero CTAs */
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* Secondary button variant for dark backgrounds */
.btn-secondary--hero {
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn-secondary--hero:hover {
  background-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

/* Slider navigation dots */
.hero-slider__dots {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 12px;
}

.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.7);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: all 0.3s ease;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-dot::after {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.7);
  background: transparent;
  transition: all 0.3s ease;
}

.hero-dot {
  border: none;
  background: none;
}

.hero-dot.active::after,
.hero-dot:hover::after {
  background: var(--color-white);
  border-color: var(--color-white);
}

.hero-dot:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 2px;
  border-radius: 50%;
}

/* ==========================================================================
   10a. Hero Word-by-Word Animation (Progressive Enhancement)
   ========================================================================== */

/*
 * Content is visible by default (opacity: 1).
 * Animation only triggers when JS adds the .animate class to .hero-headline.
 * Wrapped in prefers-reduced-motion check so users who prefer reduced motion
 * never see the staggered animation.
 */

@media (prefers-reduced-motion: no-preference) {
  .hero-headline.animate .hero-word {
    opacity: 0;
    transform: translateY(24px);
    animation: heroWordReveal 600ms ease forwards;
    animation-delay: calc(var(--word-index) * 50ms);
  }

  @keyframes heroWordReveal {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* ==========================================================================
   11. Stat Counters (placeholder — detailed styles in task 3.2)
   ========================================================================== */

.stats {
  background-color: var(--color-navy);
  text-align: center;
}

.stats-heading {
  color: var(--color-white);
  margin-bottom: var(--space-xl);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.counter {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-cyan);
  line-height: 1.1;
}

.stat-label {
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.02em;
}

/* Responsive: 3-column layout on medium+ screens */
@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   11a. Services Section & Service Cards
   ========================================================================== */

.services {
  background-color: var(--color-bg-light);
}

.section-heading {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.service-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-md);
  text-align: left;
}

.service-card__icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.service-card__title {
  margin: 0;
}

.service-card__desc {
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

/* Responsive: 2 columns at 480px+ */
@media (min-width: 480px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Responsive: 3 columns at 768px+ */
@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Responsive: 4 columns at 1024px+ */
@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ==========================================================================
   11b. Why Choose Us Section
   ========================================================================== */

.why-choose-us {
  background-color: var(--color-white);
}

.differentiators-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.differentiator {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-lg);
}

.differentiator__icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--color-cyan);
}

.differentiator__icon svg {
  width: 48px;
  height: 48px;
}

.differentiator__title {
  margin-bottom: var(--space-sm);
}

.differentiator__text {
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 320px;
  margin: 0 auto;
}

/* Responsive: 2 columns at 480px+ */
@media (min-width: 480px) {
  .differentiators-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Responsive: 4 columns at 768px+ */
@media (min-width: 768px) {
  .differentiators-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ==========================================================================
   11c. Featured Projects Section
   ========================================================================== */

.featured-projects {
  background-color: var(--color-bg-light);
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.project-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.project-card__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: var(--color-bg-light);
}

.project-card__body {
  padding: var(--space-lg);
}

.project-card__title {
  margin-bottom: var(--space-sm);
}

.project-card__caption {
  color: var(--color-text);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.projects-cta {
  text-align: center;
  margin-top: var(--space-xl);
}

/* Responsive: 3 columns at 768px+ */
@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .project-card__image {
    height: 220px;
  }
}

/* ==========================================================================
   11d. CTA Banner Section
   ========================================================================== */

.cta-banner {
  background-color: var(--color-navy);
  text-align: center;
  padding: var(--space-3xl) 0;
}

.cta-banner__content {
  max-width: 700px;
}

.cta-banner__heading {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta-banner__text {
  color: rgba(255, 255, 255, 0.85);
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.cta-banner__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

/* Secondary button on dark background */
.btn-secondary--light {
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn-secondary--light:hover {
  background-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   12. Lightbox (placeholder — detailed styles in task 4.3/6.5)
   ========================================================================== */

/* Lightbox styles will be implemented in task 4.3 */

/* ==========================================================================
   13. Contact Form (placeholder — detailed styles in task 4.4)
   ========================================================================== */

/* Contact form styles will be implemented in task 4.4 */

/* ==========================================================================
   14. WhatsApp FAB
   ========================================================================== */

.whatsapp-fab {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 900;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  min-width: 44px;
  min-height: 44px;
  background-color: #25D366;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.whatsapp-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45);
}

.whatsapp-fab:focus-visible {
  outline: 3px solid var(--color-navy);
  outline-offset: 3px;
}

.whatsapp-fab svg {
  width: 28px;
  height: 28px;
  fill: #FFFFFF;
}

/* ==========================================================================
   15. Scroll-Triggered Animations (IntersectionObserver)
   ========================================================================== */

/*
 * Elements with [data-animate] start hidden and animate in when the
 * IntersectionObserver adds the .in-view class on first intersection.
 * Wrapped in prefers-reduced-motion so elements are always visible
 * when the user prefers reduced motion.
 */

@media (prefers-reduced-motion: no-preference) {
  [data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 600ms ease, transform 600ms ease;
  }

  [data-animate].in-view {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Disable all animations and transitions when user prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   16. Responsive Breakpoints (Mobile-First)
   ========================================================================== */

/* Small devices (480px and up) */
@media (min-width: 480px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Medium devices (768px and up) */
@media (min-width: 768px) {
  .container {
    padding: 0 32px;
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  section {
    padding: var(--space-3xl) 0;
  }

  .hero {
    min-height: 100vh;
  }

  .hero-content,
  .about-hero-content,
  .services-hero-content,
  .projects-hero-content {
    padding: var(--space-3xl) 0;
  }
}

/* Large devices (1024px and up) */
@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero-content,
  .about-hero-content,
  .services-hero-content,
  .projects-hero-content {
    padding: 80px 0;
  }
}


/* ==========================================================================
   17. About Page Styles
   ========================================================================== */

/* About Hero Banner - full width with background image and overlay */
.about-hero-banner {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  background-image: url('../assets/images/about-us.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.about-hero-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(11, 31, 58, 0.7);
  z-index: 1;
}

.about-hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: var(--space-2xl) var(--space-lg);
}

@media (min-width: 480px) {
  .about-hero-content {
    padding: var(--space-3xl) var(--space-xl);
  }
}

.about-hero-content h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.about-hero-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.about-hero-text a {
  color: var(--color-cyan);
  text-decoration: underline;
}

.about-hero-text a:hover {
  color: var(--color-white);
}

.about-hero {
  background-color: var(--color-white);
}

.about-intro {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  line-height: 1.7;
  max-width: 800px;
}

/* Mission & Vision */
.mission-vision-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.mission-card,
.vision-card {
  text-align: center;
}

.mission-card blockquote,
.vision-card blockquote {
  font-style: italic;
  color: var(--color-text);
  line-height: 1.7;
  border-left: 4px solid var(--color-cyan);
  padding-left: var(--space-lg);
  text-align: left;
  margin-top: var(--space-md);
}

/* Service Areas */
.service-areas-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.area-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.area-list li {
  position: relative;
  padding-left: var(--space-lg);
  color: var(--color-text);
  line-height: 1.6;
}

.area-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: var(--color-cyan);
  border-radius: 50%;
}

.service-areas-cta {
  margin-top: var(--space-xl);
  text-align: center;
  font-size: 1rem;
}

.service-areas-cta a {
  color: var(--color-cyan-text);
  text-decoration: underline;
}

.service-areas-cta a:hover {
  color: var(--color-navy);
}

/* Company History */
.company-history {
  background-color: var(--color-white);
}

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

.history-content p {
  max-width: 800px;
  line-height: 1.8;
}

.history-cta {
  margin-top: var(--space-xl);
}

.history-image {
  display: flex;
  justify-content: center;
}

.history-image__img {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--radius-card);
  object-fit: cover;
  box-shadow: 0 4px 20px rgba(11, 31, 58, 0.12);
}

@media (min-width: 768px) {
  .history-layout {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }
}

@media (min-width: 480px) {
  .mission-vision-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* ==========================================================================
   18. Services Detail Page Styles
   ========================================================================== */

/* Services Hero Banner — Full-width with background image */
.services-hero-banner {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  background-image: url('../assets/images/service page.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.services-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(11, 31, 58, 0.8) 0%,
    rgba(11, 31, 58, 0.6) 100%
  );
  z-index: 1;
}

.services-hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: var(--space-2xl) var(--space-lg);
}

@media (min-width: 480px) {
  .services-hero-content {
    padding: var(--space-3xl) var(--space-xl);
  }
}

.services-hero-content h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.services-hero-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

/* Service Individual Page Hero */
.service-page-hero {
  background-color: var(--color-navy);
  padding: var(--space-3xl) var(--space-md);
}

.service-page-hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.service-page-intro {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  line-height: 1.7;
  max-width: 700px;
  padding: 0;
}

/* Service Page Detail */
.service-page-detail {
  padding: var(--space-2xl) 0;
}

.service-page-detail h2 {
  margin-bottom: var(--space-lg);
}

.service-page-detail p {
  max-width: 800px;
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

/* Service Page Why Choose */
.service-page-why {
  background-color: var(--color-bg-light);
  padding: var(--space-2xl) 0;
}

.service-page-why h2 {
  margin-bottom: var(--space-lg);
}

.service-benefits-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 700px;
}

.service-benefits-list li {
  position: relative;
  padding-left: var(--space-xl);
  line-height: 1.7;
  color: var(--color-text);
}

.service-benefits-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 10px;
  background-color: var(--color-cyan);
  border-radius: 50%;
}

/* Service Page Projects */
.service-page-projects {
  padding: var(--space-2xl) 0;
}

.service-page-projects h2 {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.services-intro {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  line-height: 1.7;
  max-width: 800px;
}

.services-intro a {
  color: var(--color-cyan-text);
  text-decoration: underline;
}

.services-intro a:hover {
  color: var(--color-navy);
}

.service-detail {
  padding: var(--space-2xl) 0;
}

.service-detail__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.service-detail__icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.service-detail__text h2 {
  margin-bottom: var(--space-md);
}

.service-detail__text p {
  line-height: 1.7;
  max-width: 700px;
}

.service-detail__text .btn {
  margin-top: var(--space-md);
}

@media (min-width: 768px) {
  .service-detail__content {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-xl);
  }

  .service-detail__icon {
    margin-top: var(--space-xs);
  }
}

/* ==========================================================================
   19. Projects Gallery & Filter Styles
   ========================================================================== */

.projects-hero {
  background-color: var(--color-white);
}

/* Projects Hero Banner — Full-width with background image */
.projects-hero-banner {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  background-image: url('../assets/images/Our Projects.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.projects-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(11, 31, 58, 0.8) 0%,
    rgba(11, 31, 58, 0.6) 100%
  );
  z-index: 1;
}

.projects-hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: var(--space-2xl) var(--space-lg);
}

@media (min-width: 480px) {
  .projects-hero-content {
    padding: var(--space-3xl) var(--space-xl);
  }
}

.projects-hero-content h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.projects-hero-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.projects-intro {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  line-height: 1.7;
  max-width: 800px;
}

.projects-intro a {
  color: var(--color-cyan-text);
  text-decoration: underline;
}

.projects-intro a:hover {
  color: var(--color-navy);
}

/* Filter Controls */
.filter-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  justify-content: center;
}

.filter-btn {
  padding: 10px 20px;
  border: 2px solid var(--color-navy);
  border-radius: var(--radius-btn);
  background-color: transparent;
  color: var(--color-navy);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
  min-width: 44px;
}

.filter-btn:hover {
  background-color: var(--color-bg-light);
}

.filter-btn:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 2px;
}

.filter-btn.active {
  background-color: var(--color-cyan);
  border-color: var(--color-cyan);
  color: var(--color-white);
}

/* Project Gallery Grid */
.project-gallery-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.project-gallery-card {
  border-radius: var(--radius-card);
  background-color: var(--color-white);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(11, 31, 58, 0.06);
  transition: box-shadow var(--transition-fast);
  cursor: pointer;
}

.project-gallery-card:hover {
  box-shadow: 0 4px 16px rgba(11, 31, 58, 0.12);
}

.project-gallery-card__image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background-color: var(--color-bg-light);
}

.project-gallery-card__body {
  padding: var(--space-lg);
}

.project-gallery-card__title {
  margin-bottom: var(--space-sm);
}

.project-gallery-card__caption {
  color: var(--color-text);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.project-gallery-card__sector {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-cyan-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.projects-page-cta {
  text-align: center;
  margin-top: var(--space-xl);
  font-size: 1rem;
}

.projects-page-cta a {
  color: var(--color-cyan-text);
  text-decoration: underline;
}

.projects-page-cta a:hover {
  color: var(--color-navy);
}

/* Responsive: 2 columns at 480px+ */
@media (min-width: 480px) {
  .project-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Responsive: 3 columns at 768px+ */
@media (min-width: 768px) {
  .project-gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Responsive: 4 columns at 1024px+ (optional, keep 3 for readability) */

/* ==========================================================================
   20. Lightbox Styles
   ========================================================================== */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background-color: rgba(11, 31, 58, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox[hidden] {
  display: none;
}

.lightbox__content {
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__image {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-btn);
}

.lightbox__close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2.5rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  border-radius: 50%;
  transition: background-color var(--transition-fast);
}

.lightbox__close:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.lightbox__close:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 2px;
}

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color var(--transition-fast);
}

.lightbox__prev {
  left: 16px;
}

.lightbox__next {
  right: 16px;
}

.lightbox__prev:hover,
.lightbox__next:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.lightbox__prev:focus-visible,
.lightbox__next:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 2px;
}

/* ==========================================================================
   21. Contact Page Styles
   ========================================================================== */

.contact-hero {
  background-color: var(--color-white);
}

/* Contact Hero Banner — Full-width with background image */
.contact-hero-banner {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  background-image: url('../assets/images/contact us.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.contact-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(11, 31, 58, 0.8) 0%,
    rgba(11, 31, 58, 0.6) 100%
  );
  z-index: 1;
}

.contact-hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: var(--space-2xl) var(--space-lg);
}

.contact-hero-content h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.contact-hero-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  line-height: 1.7;
  margin-bottom: 0;
}

@media (min-width: 480px) {
  .contact-hero-content {
    padding: var(--space-3xl) var(--space-xl);
  }
}

.contact-intro {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  line-height: 1.7;
  max-width: 800px;
}

.contact-intro a {
  color: var(--color-cyan-text);
  text-decoration: underline;
}

.contact-intro a:hover {
  color: var(--color-navy);
}

/* Contact Layout (form + sidebar) */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

/* Contact Form */
.contact-form-wrapper h2 {
  margin-bottom: var(--space-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  position: relative;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-weight: 500;
  color: var(--color-navy);
  font-size: 0.95rem;
}

.required {
  color: #dc2626;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-btn);
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #dc2626;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  font-size: 0.85rem;
  color: #dc2626;
  min-height: 1.2em;
}

.contact-submit {
  align-self: flex-start;
  min-width: 44px;
  min-height: 44px;
}

.form-status {
  font-weight: 500;
  padding: var(--space-md);
  border-radius: var(--radius-btn);
}

.form-status.success {
  background-color: #dcfce7;
  color: #166534;
}

.form-status.error {
  background-color: #fef2f2;
  color: #991b1b;
}

/* Contact Details Sidebar */
.contact-details h2 {
  margin-bottom: var(--space-lg);
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-info-item h3 {
  font-size: 0.95rem;
  margin-bottom: var(--space-xs);
  color: var(--color-navy);
}

.contact-info-item a {
  color: var(--color-cyan-text);
  transition: color var(--transition-fast);
}

.contact-info-item a:hover {
  color: var(--color-navy);
}

.contact-info-item address {
  font-style: normal;
  line-height: 1.6;
  color: var(--color-text);
}

.contact-info-item p {
  color: var(--color-text);
  margin: 0;
}

/* Map */
.map-container {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.map-iframe {
  display: block;
  width: 100%;
  height: 400px;
  border: 0;
}

.map-fallback {
  padding: var(--space-md);
  text-align: center;
  color: var(--color-text);
  font-size: 0.9rem;
}

/* Responsive: 2-column layout on desktop */
@media (min-width: 768px) {
  .contact-layout {
    grid-template-columns: 3fr 2fr;
  }
}

/* ==========================================================================
   22. Service Quote Form
   ========================================================================== */

.service-quote-form {
  background-color: var(--color-bg-light);
  padding: var(--space-2xl) 0;
}

.service-quote-form h2 {
  margin-bottom: var(--space-sm);
}

.quote-form-intro {
  color: var(--color-text);
  margin-bottom: var(--space-xl);
  max-width: 600px;
}

.service-form {
  max-width: 700px;
  position: relative;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 480px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}