/* ============================================
   Donnelly Dynamics Ltd — Marketing Site
   Dark Theme | Premium Consulting Aesthetic
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --deep-navy: #0D2B6B;
  --medium-blue: #1B5DB5;
  --bright-blue: #2E7ED8;
  --light-blue: #5BA3E6;
  --bg-dark: #0B0F1A;
  --surface: #111827;
  --surface-light: #1F2937;
  --text-primary: #F9FAFB;
  --text-secondary: #9CA3AF;
  --glass-bg: rgba(17, 24, 39, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Section shared styles --- */
.section {
  padding: 4rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--bright-blue);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-bottom: 1.25rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--transition), transform 0.7s var(--transition);
}

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

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(11, 15, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--glass-border);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo img {
  height: 40px;
  width: auto;
}

.nav-logo-text {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--bright-blue);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--medium-blue);
  color: var(--text-primary) !important;
  padding: 0.6rem 1.5rem;
  border-radius: 8px;
  font-weight: 600 !important;
  transition: background var(--transition), transform var(--transition) !important;
}

.nav-cta:hover {
  background: var(--bright-blue);
  transform: translateY(-1px);
}

.nav-cta::after {
  display: none !important;
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Animated gradient mesh */
.hero-bg::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 70%;
  height: 70%;
  background: radial-gradient(ellipse at center, rgba(27, 93, 181, 0.25) 0%, transparent 70%);
  animation: meshFloat1 8s ease-in-out infinite alternate;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 50%;
  height: 60%;
  background: radial-gradient(ellipse at center, rgba(13, 43, 107, 0.3) 0%, transparent 70%);
  animation: meshFloat2 10s ease-in-out infinite alternate;
}

@keyframes meshFloat1 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-30px, 20px) scale(1.05); }
}

@keyframes meshFloat2 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(20px, -15px) scale(1.08); }
}

/* Subtle grid overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 80%);
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

/* Hero profile image */
.hero-image {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image-wrapper {
  position: relative;
  width: 340px;
  height: 420px;
  border-radius: 24px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--deep-navy), var(--medium-blue));
  box-shadow:
    0 25px 60px rgba(0, 0, 0, 0.4),
    0 0 80px rgba(27, 93, 181, 0.15);
}

.hero-image-wrapper::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 24px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(91, 163, 230, 0.3), transparent 60%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  z-index: 1;
  pointer-events: none;
}

.hero-image-wrapper img {
  width: 110%;
  height: 110%;
  object-fit: cover;
  object-position: top center;
  margin-left: -5%;
  margin-top: -2%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  color: var(--light-blue);
  margin-bottom: 2rem;
  backdrop-filter: blur(8px);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--bright-blue);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--bright-blue) 0%, var(--light-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--medium-blue);
  color: var(--text-primary);
  padding: 0.9rem 2rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-primary:hover {
  background: var(--bright-blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(46, 126, 216, 0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--text-secondary);
  padding: 0.9rem 2rem;
  border-radius: 10px;
  font-weight: 500;
  font-size: 1rem;
  border: 1px solid var(--surface-light);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* --- Services Section --- */
.services {
  position: relative;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.service-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--deep-navy), var(--medium-blue));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
}

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- Case Studies Section --- */
.case-studies {
  background: var(--surface);
  position: relative;
}

.case-studies::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
}

.case-studies::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.case-card {
  background: rgba(11, 15, 26, 0.5);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2rem;
  transition: transform var(--transition), border-color var(--transition);
}

.case-card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-hover);
}

.case-industry {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--bright-blue);
  margin-bottom: 1rem;
}

.case-stat {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--bright-blue), var(--light-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.case-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.case-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* --- About Section --- */
.about .about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 2rem;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.stat-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 1.75rem;
  text-align: center;
  backdrop-filter: blur(12px);
}

.stat-number {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--bright-blue);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* --- Contact Section --- */
.contact {
  position: relative;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 2rem;
}

.contact-info p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--deep-navy), var(--medium-blue));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-detail-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contact-detail-text strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.contact-form {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(12px);
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(11, 15, 26, 0.6);
  border: 1px solid var(--surface-light);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--medium-blue);
  box-shadow: 0 0 0 3px rgba(27, 93, 181, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(156, 163, 175, 0.5);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.btn-submit {
  width: 100%;
  padding: 1rem;
  background: var(--medium-blue);
  color: var(--text-primary);
  border: none;
  border-radius: 10px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-submit:hover {
  background: var(--bright-blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(46, 126, 216, 0.3);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-submit .spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto;
}

.btn-submit.loading .btn-text {
  display: none;
}

.btn-submit.loading .spinner {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.form-message {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #10B981;
}

.form-message.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #EF4444;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 2rem 0;
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-logo img {
  height: 32px;
  width: auto;
}

.footer-logo-text {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
}

.footer-copy {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-image {
    order: -1;
    justify-content: center;
  }

  .hero-image-wrapper {
    width: 220px;
    height: 275px;
    border-radius: 20px;
  }

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

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

  .about .about-content {
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 3rem 0;
  }

  .hero-inner {
    gap: 1.5rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--surface);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 1.5rem;
    transition: right var(--transition);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
  }

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

  .nav-links a {
    font-size: 1.1rem;
  }

  .hero-image {
    justify-content: center;
  }

  .hero-image-wrapper {
    width: 160px;
    height: 200px;
    border-radius: 16px;
  }

  .hero h1 {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero p {
    font-size: 1.05rem;
  }

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

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

  .about .about-content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer .container {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn-primary,
  .hero-buttons .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }
}