/* ==========================================================================
   Lightguide Website — styles.css
   Single stylesheet for all pages. Mobile-first responsive approach.
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=Lato:wght@300;400;700&display=swap');

/* ==========================================================================
   2.1  CSS Custom Properties (Design Tokens)
   ========================================================================== */
:root {
  /* Colors */
  --color-primary: #034fa6;
  --color-accent: #edcd1f;
  --color-white: #ffffff;
  --color-text: #333333;
  --color-text-light: #7a7a7a;
  --color-bg: #ffffff;
  --color-bg-light: #f5f5f5;

  /* Typography */
  --font-heading: 'Oswald', sans-serif;
  --font-body: 'Lato', sans-serif;

  /* Spacing */
  --container-max: 1200px;
  --section-padding: 4rem 1rem;
  --card-gap: 1.5rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   2.8  Global Layout — Container & Section Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

section {
  padding: var(--section-padding);
}

/* ==========================================================================
   2.2  Navigation Bar
   ========================================================================== */
.site-header {
  background-color: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

/* Logo */
.logo img {
  height: 40px;
  width: auto;
  border-radius: 6px;
  padding: 3px;
  background-color: rgba(255, 255, 255, 0.85);
}

/* Nav list — mobile: hidden by default */
.main-nav {
  display: none;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-link {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--color-white);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-accent);
}

.nav-link.active {
  color: var(--color-accent);
  font-weight: 700;
}

/* Hamburger toggle — visible on mobile */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

/* nav-open state — mobile overlay */
.site-header.nav-open .main-nav {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-primary);
  padding-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.site-header.nav-open .hamburger {
  background-color: transparent;
}

.site-header.nav-open .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header.nav-open .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ==========================================================================
   2.3  Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 2.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.footer-info h3,
.footer-links h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--color-white);
}

.footer-info p {
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

.footer-info a,
.footer-links a {
  color: var(--color-white);
  text-decoration: none;
  transition: text-decoration var(--transition-fast);
}

.footer-info a:hover,
.footer-info a:focus,
.footer-links a:hover,
.footer-links a:focus {
  text-decoration: underline;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-links li {
  font-size: 0.95rem;
}

.footer-copy {
  grid-column: 1 / -1;
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ==========================================================================
   2.4  Hero Section (Landing Page)
   ========================================================================== */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--color-white);
  padding: 2rem 1rem;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.cta-btn {
  display: inline-block;
  padding: 0.85rem 2.25rem;
  background-color: var(--color-accent);
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  transition: background-color var(--transition-normal), transform var(--transition-fast);
}

.cta-btn:hover,
.cta-btn:focus {
  background-color: #d4b71a;
  transform: translateY(-2px);
}

/* ==========================================================================
   2.5  Service Cards
   ========================================================================== */
.services {
  padding: var(--section-padding);
  background-color: var(--color-bg-light);
}

.services h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--color-primary);
}

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

.service-card {
  background-color: var(--color-white);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  text-decoration: none;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
}

.service-card:hover,
.service-card:focus {
  transform: translateY(-6px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.service-card img {
  width: 60%;
  max-height: 160px;
  object-fit: contain;
  margin: 1.25rem auto 0;
}

.service-card-body {
  padding: 1.25rem;
  flex: 1;
}

.service-card-body h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.service-card-body p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* ==========================================================================
   2.6  Company Introduction
   ========================================================================== */
.company-intro {
  padding: var(--section-padding);
}

.company-intro .container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.company-intro-text h2 {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.company-intro-text p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.company-intro-text h3 {
  color: var(--color-primary);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.company-intro-text ul {
  list-style: disc;
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

.company-intro-text li {
  margin-bottom: 0.3rem;
  line-height: 1.5;
  font-size: 0.95rem;
}

.company-intro-image img {
  width: 100%;
  border-radius: 6px;
  object-fit: cover;
}

/* ==========================================================================
   2.7  Service Page & Contact Page Content Styles
   ========================================================================== */

/* --- Page Hero (inner pages) --- */
.page-hero {
  background-color: var(--color-primary);
  color: var(--color-white);
  text-align: center;
  padding: 3rem 1rem;
}

.page-hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* --- Service Content --- */
.service-content {
  padding: var(--section-padding);
}

.service-content .container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.service-content-image img {
  width: 100%;
  border-radius: 6px;
  object-fit: cover;
}

.service-content-text h2 {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.service-content-text p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.service-content-text .cta-btn {
  margin-top: 0.5rem;
}

/* --- Contact Grid --- */
.contact-section {
  padding: var(--section-padding);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.contact-details h2 {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.contact-details p {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.contact-details a {
  color: var(--color-primary);
  font-weight: 700;
  transition: color var(--transition-fast);
}

.contact-details a:hover,
.contact-details a:focus {
  color: var(--color-accent);
  text-decoration: underline;
}

.contact-details img {
  width: 100%;
  border-radius: 6px;
  margin-top: 1.5rem;
  object-fit: cover;
}

/* --- Contact Form --- */
.contact-form h2 {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-family: var(--font-body);
  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-primary);
  box-shadow: 0 0 0 3px rgba(3, 79, 166, 0.15);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-group .error-message {
  display: none;
  color: #d32f2f;
  font-size: 0.85rem;
  margin-top: 0.3rem;
}

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: #d32f2f;
}

.form-group.has-error .error-message {
  display: block;
}

.contact-form .cta-btn {
  width: 100%;
  text-align: center;
  padding: 0.85rem;
  font-size: 1.05rem;
}

/* --- Status Message Banner --- */
.status-message {
  display: none;
  padding: 1rem 1.25rem;
  border-radius: 4px;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
}

.status-message.success {
  display: block;
  background-color: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #a5d6a7;
}

.status-message.error {
  display: block;
  background-color: #ffebee;
  color: #c62828;
  border: 1px solid #ef9a9a;
}

/* --- Google Maps Container --- */
.map-container {
  width: 100%;
  padding: var(--section-padding);
}

.map-container iframe {
  width: 100%;
  height: 300px;
  border: 0;
  border-radius: 6px;
}

/* ==========================================================================
   2.8  Responsive Breakpoints
   ========================================================================== */

/* --- Tablet: min-width 768px --- */
@media (min-width: 768px) {

  h1 { font-size: 3rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.35rem; }

  /* Navigation — desktop horizontal layout */
  .nav-toggle {
    display: none;
  }

  .main-nav {
    display: block;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: 0.25rem;
  }

  .nav-link {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }

  .logo img {
    height: 48px;
  }

  /* Hero — desktop height */
  .hero {
    min-height: 80vh;
  }

  .hero h1 {
    font-size: 3.5rem;
  }

  /* Footer — 2-column grid */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* Service Cards — 2×2 grid */
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Company Intro — 2-column (60/40) */
  .company-intro .container {
    flex-direction: row;
    align-items: flex-start;
  }

  .company-intro-text {
    flex: 0 0 60%;
  }

  .company-intro-image {
    flex: 0 0 38%;
  }

  /* Service Content — 2-column */
  .service-content .container {
    flex-direction: row;
    align-items: flex-start;
  }

  .service-content-image {
    flex: 0 0 45%;
  }

  .service-content-text {
    flex: 1;
  }

  /* Contact Grid — 2-column */
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* Map — taller on tablet+ */
  .map-container iframe {
    height: 400px;
  }

  /* Contact form button — auto width */
  .contact-form .cta-btn {
    width: auto;
    padding: 0.85rem 2.25rem;
  }
}

/* --- Desktop: min-width 1024px --- */
@media (min-width: 1024px) {

  .nav-link {
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
  }

  .logo img {
    height: 52px;
  }

  .hero h1 {
    font-size: 4rem;
  }

  .page-hero h1 {
    font-size: 2.75rem;
  }

  .service-card img {
    height: 220px;
  }

  .map-container iframe {
    height: 450px;
  }
}