/* ============================================
   Fabrisense - Main Stylesheet
   Corporate IoT/AI Website
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
  /* Colors */
  --color-primary: #5B4DC7;
  --color-primary-dark: #463AA0;
  --color-primary-light: #7B6FD4;
  --color-accent: #8B7FE8;
  --color-dark: #1A1A2E;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-light-bg: #F8F9FA;
  --color-white: #FFFFFF;
  --color-success: #25D366;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  --gradient-dark: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);

  /* Typography */
  --font-family: 'Inter', sans-serif;

  /* Spacing */
  --section-padding: 80px 0;
  --container-max-width: 1200px;
  --container-padding: 0 20px;

  /* Borders & Shadows */
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
  --shadow-btn: 0 4px 15px rgba(91, 77, 199, 0.3);
  --shadow-navbar: 0 2px 20px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-base: all 0.3s ease;
  --transition-slow: all 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-dark);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 1rem;
  color: var(--color-text-light);
}

/* ============================================
   Container
   ============================================ */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--container-padding);
}

/* ============================================
   2. Header / Navbar
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: var(--color-white);
  padding: 12px 0;
  box-shadow: var(--shadow-navbar);
}

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

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-white);
  z-index: 1001;
}

.navbar.scrolled .navbar-logo {
  color: var(--color-primary);
}

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

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  position: relative;
  padding: 4px 0;
}

.navbar-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition-base);
}

.navbar-nav a:hover::after,
.navbar-nav a.active::after {
  width: 100%;
}

.navbar.scrolled .navbar-nav a {
  color: var(--color-text);
}

.navbar.scrolled .navbar-nav a:hover {
  color: var(--color-primary);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-login {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-white);
  padding: 8px 24px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-btn);
  transition: var(--transition-base);
  background: transparent;
  cursor: pointer;
}

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

.navbar.scrolled .btn-login {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.navbar.scrolled .btn-login:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-white);
  transition: var(--transition-base);
  border-radius: 2px;
}

.navbar.scrolled .hamburger span {
  background: var(--color-dark);
}

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

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

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

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-dark);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
}

.mobile-nav.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav a {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
}

.mobile-nav a:hover {
  color: var(--color-accent);
}

/* ============================================
   3. Hero Sections
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.hero > *:not(.hero-content):not(:first-child) {
  position: relative;
  z-index: 2;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(26, 26, 46, 0.92) 0%,
    rgba(70, 58, 160, 0.88) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 0 20px;
}

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 20px;
  line-height: 1.15;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-content h1 span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 36px;
  line-height: 1.7;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Sub-page hero (shorter) */
.hero-sub {
  min-height: 50vh;
}

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

/* ============================================
   4. Section Layouts
   ============================================ */
.section {
  padding: var(--section-padding);
}

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

.section-dark {
  background: var(--color-dark);
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-title p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 20px auto 0;
}

.section-dark .section-title h2 {
  color: var(--color-white);
}

.section-dark .section-title p {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   5. Feature Cards
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.features-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  padding: 40px 30px;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

.feature-card-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(91, 77, 199, 0.1), rgba(123, 111, 212, 0.1));
  font-size: 1.75rem;
  color: var(--color-primary);
}

.feature-card-icon img {
  width: 36px;
  height: 36px;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ============================================
   6. Pricing Cards
   ============================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  align-items: start;
}

.pricing-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  padding: 40px 32px;
  box-shadow: var(--shadow-card);
  text-align: center;
  position: relative;
  transition: var(--transition-base);
  border: 2px solid transparent;
}

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

.pricing-card.recommended {
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.pricing-card.recommended:hover {
  transform: scale(1.05) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: var(--color-white);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 24px;
  border-radius: 20px;
  white-space: nowrap;
}

.pricing-card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.pricing-card .price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 20px 0;
  line-height: 1;
}

.pricing-card .price small {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-light);
}

.pricing-card .price-description {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 10px 0;
  font-size: 0.95rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid #f0f0f0;
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li::before {
  content: '\2713';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  min-width: 22px;
  border-radius: 50%;
  background: rgba(37, 211, 102, 0.1);
  color: var(--color-success);
  font-size: 0.75rem;
  font-weight: 700;
}

/* ============================================
   7. Testimonial Cards
   ============================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 30px;
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  padding: 36px 32px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: var(--transition-base);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: 20px;
  left: 28px;
  font-size: 5rem;
  line-height: 1;
  font-family: Georgia, serif;
  color: rgba(91, 77, 199, 0.12);
  pointer-events: none;
}

.testimonial-card blockquote {
  font-size: 1rem;
  font-style: italic;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-author img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.testimonial-author-info h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.testimonial-author-info p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ============================================
   8. Stats Counter Section
   ============================================ */
.stats-section {
  background: var(--color-dark);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-item {
  padding: 20px;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
  margin-bottom: 8px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 400;
}

/* ============================================
   9. Case Study Cards
   ============================================ */
.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.case-study-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
}

.case-study-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.case-study-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.case-study-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.case-study-card:hover .case-study-image img {
  transform: scale(1.05);
}

.case-study-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--gradient-primary);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
}

.case-study-body {
  padding: 28px;
}

.case-study-body h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.case-study-body p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.case-study-results {
  display: flex;
  gap: 24px;
  padding-top: 16px;
  border-top: 1px solid #f0f0f0;
}

.case-study-result {
  text-align: center;
}

.case-study-result .result-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.case-study-result .result-label {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* ============================================
   10. Contact Form
   ============================================ */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-family);
  font-size: 0.95rem;
  color: var(--color-text);
  border: 2px solid #e0e0e0;
  border-radius: var(--radius-btn);
  outline: none;
  transition: var(--transition-base);
  background: var(--color-white);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #aaa;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(91, 77, 199, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* ============================================
   11. Footer
   ============================================ */
.footer {
  background: var(--color-dark);
  padding: 60px 0 30px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 280px;
}

.footer-brand .navbar-logo {
  color: var(--color-white);
  margin-bottom: 16px;
  font-size: 1.3rem;
}

.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

.footer-column h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 20px;
}

.footer-column ul li {
  margin-bottom: 12px;
}

.footer-column ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

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

/* Footer Social Icons */
.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  font-size: 1rem;
  transition: var(--transition-base);
}

.footer-social a:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
}

/* Footer Newsletter */
.footer-newsletter p {
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.footer-newsletter-form {
  display: flex;
  gap: 8px;
}

.footer-newsletter-form input {
  flex: 1;
  padding: 12px 16px;
  font-family: var(--font-family);
  font-size: 0.9rem;
  border: none;
  border-radius: var(--radius-btn);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  outline: none;
  transition: var(--transition-base);
}

.footer-newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.footer-newsletter-form input:focus {
  background: rgba(255, 255, 255, 0.15);
}

.footer-newsletter-form button {
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-btn);
  background: var(--gradient-primary);
  color: var(--color-white);
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-base);
  white-space: nowrap;
}

.footer-newsletter-form button:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

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

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-links a:hover {
  color: var(--color-accent);
}

/* ============================================
   12. WhatsApp Floating Button
   ============================================ */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 900;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--color-success);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.75rem;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
  border: none;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}

.whatsapp-float::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--color-success);
  animation: whatsapp-pulse 2s infinite;
  z-index: -1;
}

@keyframes whatsapp-pulse {
  0% {
    transform: scale(1);
    opacity: 0.5;
  }
  100% {
    transform: scale(1.5);
    opacity: 0;
  }
}

/* ============================================
   13. Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
  line-height: 1.4;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(91, 77, 199, 0.4);
}

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

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

/* Dark context secondary button */
.btn-secondary-dark {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

.btn-whatsapp {
  background: var(--color-success);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

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

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(224, 64, 251, 0.3);
}

.btn-sm {
  padding: 10px 22px;
  font-size: 0.9rem;
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.1rem;
}

/* ============================================
   14. Responsive Breakpoints
   ============================================ */

/* Tablet - 1024px */
@media (max-width: 1024px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }

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

  .features-grid,
  .features-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

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

/* Mobile - 768px */
@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }

  /* Navbar mobile */
  .navbar-nav,
  .navbar-actions {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-nav {
    display: flex;
  }

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

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 300px;
  }

  /* Grids mobile */
  .features-grid,
  .features-grid-4 {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .pricing-card.recommended {
    transform: none;
  }

  .pricing-card.recommended:hover {
    transform: translateY(-4px);
  }

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

  .case-studies-grid {
    grid-template-columns: 1fr;
  }

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

  .stat-number {
    font-size: 2.25rem;
  }

  /* Form mobile */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer mobile */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

  .footer-bottom-links {
    justify-content: center;
  }

  /* Section titles mobile */
  .section-title {
    margin-bottom: 40px;
  }

  .section-title h2 {
    font-size: 1.75rem;
  }
}

/* Small mobile - 480px */
@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.75rem;
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .pricing-card {
    padding: 28px 20px;
  }

  .feature-card {
    padding: 30px 20px;
  }

  .footer-newsletter-form {
    flex-direction: column;
  }
}

/* ============================================
   15. Animations
   ============================================ */

/* Fade In Up (add via JS on scroll) */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Fade In */
.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
}

/* Fade In Left */
.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Fade In Right */
.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Scale In */
.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Staggered children delay */
.stagger-children > *:nth-child(1) { transition-delay: 0s; }
.stagger-children > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children > *:nth-child(5) { transition-delay: 0.4s; }
.stagger-children > *:nth-child(6) { transition-delay: 0.5s; }

/* Hover lift effect (generic) */
.hover-lift {
  transition: var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-6px);
}

/* ============================================
   16. Utility Classes
   ============================================ */

/* Text alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Text colors */
.text-primary { color: var(--color-primary); }
.text-white { color: var(--color-white); }
.text-light { color: var(--color-text-light); }
.text-dark { color: var(--color-dark); }

/* Font weights */
.fw-light { font-weight: 300; }
.fw-regular { font-weight: 400; }
.fw-medium { font-weight: 500; }
.fw-semibold { font-weight: 600; }
.fw-bold { font-weight: 700; }
.fw-extrabold { font-weight: 800; }

/* Spacing - margins */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 48px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 48px; }

.mx-auto { margin-left: auto; margin-right: auto; }

/* Spacing - padding */
.pt-0 { padding-top: 0; }
.pt-1 { padding-top: 8px; }
.pt-2 { padding-top: 16px; }
.pt-3 { padding-top: 24px; }
.pt-4 { padding-top: 32px; }
.pt-5 { padding-top: 48px; }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: 8px; }
.pb-2 { padding-bottom: 16px; }
.pb-3 { padding-bottom: 24px; }
.pb-4 { padding-bottom: 32px; }
.pb-5 { padding-bottom: 48px; }

.py-0 { padding-top: 0; padding-bottom: 0; }
.py-1 { padding-top: 8px; padding-bottom: 8px; }
.py-2 { padding-top: 16px; padding-bottom: 16px; }
.py-3 { padding-top: 24px; padding-bottom: 24px; }
.py-4 { padding-top: 32px; padding-bottom: 32px; }
.py-5 { padding-top: 48px; padding-bottom: 48px; }

/* Flex helpers */
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }

/* Grid helpers */
.d-grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-inline-block { display: inline-block; }

/* Sizing */
.w-100 { width: 100%; }
.h-100 { height: 100%; }

/* Overflow */
.overflow-hidden { overflow: hidden; }

/* Position */
.position-relative { position: relative; }

/* Border radius */
.rounded { border-radius: var(--radius-card); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-full { border-radius: 50%; }

/* Shadows */
.shadow { box-shadow: var(--shadow-card); }
.shadow-hover { box-shadow: var(--shadow-card-hover); }
.shadow-none { box-shadow: none; }

/* Background */
.bg-primary { background: var(--color-primary); }
.bg-dark { background: var(--color-dark); }
.bg-light { background: var(--color-light-bg); }
.bg-white { background: var(--color-white); }
.bg-gradient { background: var(--gradient-primary); }

/* Visibility helpers for responsive */
@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}