/*
 * Global Stylesheet for D3-FORGE website
 *
 * This stylesheet defines a simple design system for the D3-FORGE site.  It
 * includes colour variables, typography rules and responsive layout classes.
 * The design emphasises clarity and accessibility, with ample white space
 * and high contrast.  Media queries are used to adapt the layout across
 * desktops, tablets and phones – a key tenant of responsive design,
 * which according to the MDN Web Docs describes a site that “responds to
 * the environment in which it is viewed”.
 */

/* Root variables for colours and sizing */
:root {
  --colour-primary: #563d7c;
  --colour-secondary: #0077b6;
  --colour-accent: #00b4d8;
  --colour-light: #f8f9fa;
  --colour-dark: #1b1f24;
  --colour-text: #333;
  --max-width: 1200px;
  --transition-speed: 0.3s;
  --font-title: 'Poppins', sans-serif;
  --font-body: 'Open Sans', sans-serif;
}

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

body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--colour-text);
  background-color: var(--colour-light);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-speed);
}

ul {
  list-style: none;
}

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

/* Container */
.container {
  width: 90%;
  max-width: var(--max-width);
  margin: auto;
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  background: transparent;
  z-index: 1000;
  transition: background var(--transition-speed), box-shadow var(--transition-speed);
}

.navbar.scrolled {
  background: rgba(27, 31, 36, 0.9);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--colour-light);
  letter-spacing: 1px;
}

.navbar ul.nav-links {
  display: flex;
  gap: 2rem;
}

.navbar ul.nav-links li a {
  color: var(--colour-light);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.9rem;
  padding-bottom: 0.2rem;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-speed);
}

.navbar ul.nav-links li a:hover,
.navbar ul.nav-links li a.active {
  border-color: var(--colour-accent);
}

/* Hamburger for mobile */
.navbar .hamburger {
  display: none;
  font-size: 2rem;
  color: var(--colour-light);
  cursor: pointer;
}

/* Mobile navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--colour-dark);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  z-index: 999;
}

.mobile-nav a {
  color: var(--colour-light);
  font-size: 1.3rem;
  text-transform: uppercase;
  font-family: var(--font-title);
}

/* Hero section */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('../assets/hero.jpg') center/cover no-repeat;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--colour-light);
  padding: 0 1rem;
  position: relative;
  padding-top: 4rem; /* offset for fixed navbar */
}

.hero h1 {
  font-family: var(--font-title);
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: 1rem;
  text-shadow: 0 4px 10px rgba(0,0,0,0.4);
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  margin-bottom: 2rem;
  line-height: 1.4;
}

.btn {
  display: inline-block;
  background: var(--colour-accent);
  color: var(--colour-light);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: background var(--transition-speed);
}

.btn:hover {
  background: var(--colour-secondary);
}

/* Modal overlay for course details */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  align-items: center;
  justify-content: center;
  z-index: 9999;
  overflow-y: auto;
  padding: 2rem;
}

/* Container for modal content */
.modal-content {
  background: var(--colour-light);
  color: var(--colour-text);
  padding: 2rem;
  border-radius: 8px;
  max-width: 800px;
  width: 100%;
  position: relative;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.modal-content h2 {
  font-family: var(--font-title);
  margin-bottom: 0.5rem;
  font-size: 1.8rem;
  color: var(--colour-primary);
}

.modal-content h3 {
  font-family: var(--font-title);
  margin-top: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--colour-secondary);
}

.modal-content ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
  list-style: disc;
}

/* Close button for modal */
.modal-close {
  position: absolute;
  top: 0.5rem;
  right: 0.8rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--colour-dark);
}

/* Section headings */
.section {
  padding: 6rem 0;
}

.section-title {
  font-family: var(--font-title);
  font-size: 2rem;
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--colour-dark);
}

.section-subtitle {
  text-align: center;
  max-width: 600px;
  margin: auto;
  margin-bottom: 3rem;
  color: #555;
  line-height: 1.5;
}

/* Cards grid */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--colour-light);
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.card ion-icon {
  font-size: 3rem;
  color: var(--colour-secondary);
  margin-bottom: 1rem;
}

.card h3 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.95rem;
  color: #555;
}

/* Services and training sections card specific styling */
.card.service {
  background: var(--colour-dark);
  color: var(--colour-light);
}

.card.service ion-icon {
  color: var(--colour-accent);
}

.card.training {
  background: var(--colour-accent);
  color: var(--colour-light);
}

.card.training ion-icon {
  color: var(--colour-dark);
}

/* About section */
.about {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
}

.about .image {
  flex: 1 1 400px;
}

.about .content {
  flex: 1 1 400px;
}

.about .content h2 {
  font-family: var(--font-title);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.about .content p {
  margin-bottom: 1rem;
  color: #555;
  line-height: 1.5;
}

/* Contact section */
.contact-info {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.contact-info > div {
  flex: 1 1 300px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form input,
.contact-form textarea {
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.9rem;
  resize: vertical;
}

.contact-form button {
  align-self: flex-start;
}

/* Footer */
footer {
  background: var(--colour-dark);
  color: var(--colour-light);
  padding: 2rem 0;
}

footer .footer-container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

footer .footer-column {
  flex: 1 1 200px;
}

footer h4 {
  font-family: var(--font-title);
  margin-bottom: 0.5rem;
}

footer ul li a {
  color: var(--colour-light);
  font-size: 0.9rem;
  display: block;
  margin-bottom: 0.5rem;
}

footer ul li a:hover {
  color: var(--colour-accent);
}

footer .social-icons {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

footer .social-icons a {
  font-size: 1.5rem;
  color: var(--colour-light);
}

footer .social-icons a:hover {
  color: var(--colour-accent);
}

.copyright {
  text-align: center;
  margin-top: 2rem;
  font-size: 0.85rem;
  color: #aaa;
}

/* Fade-in animation for scroll reveal */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive media queries */
@media (max-width: 991px) {
  .navbar ul.nav-links { display: none; }
  .navbar .hamburger { display: block; }
  .mobile-nav { display: none; }
  .mobile-nav.open { display: flex; }
  .about { flex-direction: column; text-align: center; }
  .about .image, .about .content { flex: 1 1 100%; }
  .contact-info { flex-direction: column; }
  footer .footer-container { flex-direction: column; }
}

/* Floating WhatsApp */
.whatsapp-floating{
  position:fixed; bottom:20px; right:20px;
  width:56px; height:56px; border-radius:50%;
  background:#25D366; color:#fff;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 6px 18px rgba(0,0,0,.2);
  z-index:10000; transition:transform .2s, box-shadow .2s;
}
.whatsapp-floating:hover{ transform:translateY(-2px); box-shadow:0 10px 24px rgba(0,0,0,.3); }
@media (max-width:480px){
  .whatsapp-floating{ bottom:16px; right:16px; width:56px; height:56px; }
}