/* ============================================
   AirconExpert — Professional CSS Stylesheet
   Blue & White Theme | Mobile-First Responsive
   ============================================ */

/* ----- CSS Variables ----- */
:root {
  --primary: #0a4b8c;
  --primary-dark: #072f5c;
  --primary-light: #1e90ff;
  --accent: #e8f4ff;
  --white: #ffffff;
  --off-white: #f8fafc;
  --gray-50: #f1f5f9;
  --gray-100: #e2e8f0;
  --gray-200: #cbd5e1;
  --gray-300: #94a3b8;
  --gray-400: #64748b;
  --gray-500: #475569;
  --gray-600: #334155;
  --gray-700: #1e293b;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 70px;
}

/* ----- 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, 'Segoe UI', Roboto, sans-serif;
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--primary-light);
}

ul {
  list-style: none;
}

/* ----- Typography ----- */
h1, h2, h3, h4, h5, h6 {
  color: var(--gray-700);
  line-height: 1.25;
  font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  color: var(--gray-500);
  margin-bottom: 1rem;
}

.section-title {
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--gray-400);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 3rem auto;
}

@media (min-width: 768px) {
  h1 { font-size: 3.5rem; }
  h2 { font-size: 2.5rem; }
  h3 { font-size: 1.75rem; }
}

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

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(10, 75, 140, 0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(10, 75, 140, 0.4);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

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

.btn-white:hover {
  background: var(--accent);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

/* ----- Navigation / Header ----- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  height: var(--header-height);
  transition: var(--transition);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.logo span {
  color: var(--primary-light);
}

/* Desktop Nav */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  padding: 0.5rem 1rem;
  color: var(--gray-500);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: var(--accent);
}

.nav-links a.nav-cta {
  background: var(--primary);
  color: var(--white);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  margin-left: 0.5rem;
}

.nav-links a.nav-cta:hover {
  background: var(--primary-dark);
  color: var(--white);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--gray-700);
  border-radius: 3px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

@media (max-width: 767px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 0.5rem;
    box-shadow: var(--shadow-xl);
    transition: var(--transition);
    z-index: 999;
  }

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

  .nav-links a {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1.1rem;
  }

  .nav-links a.nav-cta {
    margin-left: 0;
    margin-top: 0.5rem;
    text-align: center;
  }

  /* Overlay */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 998;
  }

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

/* ----- Hero Section ----- */
.hero {
  padding: calc(var(--header-height) + 2rem) 0 4rem;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/hero-pattern.svg') repeat;
  opacity: 0.05;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--white);
  clip-path: ellipse(70% 100% at 50% 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 1.25rem;
}

.hero h1 span {
  color: #60b5ff;
}

.hero p {
  color: rgba(255,255,255,0.85);
  font-size: 1.2rem;
  margin-bottom: 2rem;
  max-width: 550px;
}

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

.hero-image {
  position: absolute;
  right: -50px;
  bottom: 0;
  width: 45%;
  max-width: 600px;
  pointer-events: none;
}

.hero-image img {
  width: 100%;
  height: auto;
}

@media (max-width: 1024px) {
  .hero-image {
    opacity: 0.15;
    right: -20%;
    width: 60%;
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + 1.5rem) 0 3rem;
    text-align: center;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

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

/* ----- Section Spacing ----- */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--off-white);
}

/* ----- Services Grid (Home preview) ----- */
.services-grid,
.services-grid-full {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* ----- Service Card ----- */
.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--gray-100);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.service-card .icon {
  width: 64px;
  height: 64px;
  background: var(--accent);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-size: 1.75rem;
  color: var(--primary);
  transition: var(--transition);
}

.service-card:hover .icon {
  background: var(--primary);
  color: var(--white);
}

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

.service-card p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

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

.why-item {
  text-align: center;
  padding: 2rem 1.5rem;
}

.why-item .icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--accent), var(--white));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-size: 2rem;
  color: var(--primary);
  border: 2px solid var(--gray-100);
  transition: var(--transition);
}

.why-item:hover .icon {
  border-color: var(--primary-light);
  transform: scale(1.1);
}

.why-item h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.why-item p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* ----- About Page ----- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.about-text h2 {
  margin-bottom: 1.5rem;
}

.about-text p {
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.values-list {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.value-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.value-item .icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.25rem;
}

.value-item h4 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.value-item p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-image {
    order: -1;
  }

  .about-image img {
    height: 250px;
  }
}

/* ----- Services Full Page ----- */
.service-detail-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--gray-100);
  display: flex;
  flex-direction: column;
}

.service-detail-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-detail-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.service-detail-card .content {
  padding: 1.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.service-detail-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.service-detail-card h3 .icon {
  color: var(--primary);
}

.service-detail-card p {
  font-size: 0.9375rem;
  flex: 1;
  margin-bottom: 1rem;
}

.service-detail-card .price {
  font-weight: 700;
  color: var(--primary);
  font-size: 1.125rem;
}

/* ----- Gallery ----- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-item .overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 75, 140, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  color: var(--white);
  font-weight: 600;
  font-size: 1rem;
}

.gallery-item:hover .overlay {
  opacity: 1;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.92);
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox.show {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-xl);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--white);
  font-size: 2rem;
  cursor: pointer;
  opacity: 0.7;
  transition: var(--transition);
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.15);
  border: none;
  color: var(--white);
  font-size: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255,255,255,0.3);
}

.lightbox-prev { left: 1.5rem; }
.lightbox-next { right: 1.5rem; }

@media (max-width: 640px) {
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 0.5rem;
  }

  .lightbox-prev,
  .lightbox-next {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }

  .lightbox-prev { left: 0.5rem; }
  .lightbox-next { right: 0.5rem; }
}

/* ----- Contact Page ----- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: flex-start;
}

.contact-form-wrapper {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}

.contact-form-wrapper h3 {
  margin-bottom: 1.5rem;
}

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

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--gray-600);
  margin-bottom: 0.375rem;
}

.form-group .required {
  color: var(--error);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  border: 2px solid var(--gray-100);
  border-radius: var(--radius-sm);
  background: var(--off-white);
  transition: var(--transition);
  color: var(--gray-700);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-light);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(30, 144, 255, 0.1);
}

.form-control.error {
  border-color: var(--error);
}

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

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23475669' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

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

.form-error {
  color: var(--error);
  font-size: 0.85rem;
  margin-top: 0.25rem;
  display: none;
}

.form-error.show {
  display: block;
}

.form-success {
  display: none;
  text-align: center;
  padding: 2rem;
}

.form-success.show {
  display: block;
}

.form-success .icon {
  font-size: 3rem;
  color: var(--success);
  margin-bottom: 1rem;
}

.form-success h3 {
  color: var(--success);
  margin-bottom: 0.5rem;
}

.form-success p {
  color: var(--gray-400);
}

/* Honeypot - invisible to humans */
.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  overflow: hidden;
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-info-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: var(--transition);
}

.contact-info-card:hover {
  border-color: var(--primary-light);
}

.contact-info-card .icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.25rem;
}

.contact-info-card h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.contact-info-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
  color: var(--gray-400);
}

/* Map placeholder */
.map-placeholder {
  margin-top: 2rem;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--gray-50);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-300);
  font-size: 1rem;
  border: 1px solid var(--gray-100);
}

.map-placeholder iframe {
  width: 100%;
  height: 350px;
  border: none;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-form-wrapper {
    padding: 1.5rem;
  }

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

/* ----- CTA Banner ----- */
.cta-banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: 4rem 0;
  text-align: center;
  color: var(--white);
}

.cta-banner h2 {
  color: var(--white);
  margin-bottom: 1rem;
}

.cta-banner p {
  color: rgba(255,255,255,0.85);
  max-width: 500px;
  margin: 0 auto 2rem;
}

.cta-banner .btn {
  font-size: 1.125rem;
  padding: 1rem 2.5rem;
}

/* ----- Footer ----- */
.site-footer {
  background: var(--gray-700);
  color: rgba(255,255,255,0.7);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  color: var(--white);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.footer-brand h3 span {
  color: var(--primary-light);
}

.footer-brand p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  max-width: 300px;
}

.footer-col h4 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  padding: 0.35rem 0;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
  margin-bottom: 0;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 1.1rem;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary);
  color: var(--white);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand p {
    margin: 0 auto;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ----- Utilities ----- */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

/* ----- Page Header Banner ----- */
.page-banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: calc(var(--header-height) + 3rem) 0 3rem;
  text-align: center;
  color: var(--white);
}

.page-banner h1 {
  color: var(--white);
  margin-bottom: 0.5rem;
}

.page-banner p {
  color: rgba(255,255,255,0.8);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto;
}

/* ----- Stats / Achievements ----- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item h3 {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.stat-item p {
  color: var(--gray-400);
  font-size: 0.95rem;
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .stat-item h3 {
    font-size: 2rem;
  }
}

/* ----- Loading Spinner ----- */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ----- Back to Top ----- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.25rem;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  z-index: 900;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
}

/* ----- Responsive Helpers ----- */
@media (max-width: 1024px) {
  .services-grid-full {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .services-grid,
  .services-grid-full {
    grid-template-columns: 1fr;
  }
}

/* ----- Print Styles ----- */
@media print {
  .site-header,
  .back-to-top,
  .hamburger,
  .nav-overlay {
    display: none !important;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }

  .page-banner {
    padding: 1rem 0;
  }
}