/* ============================================
   HÒA BÌNH DECOR - Premium Interior Website
   Modern • Elegant • Professional
   ============================================ */

:root {
  /* Colors - Luxury Gold & Deep Navy */
  --primary: #c9a227;
  --primary-dark: #a8861f;
  --primary-light: #e8c547;
  --secondary: #0f172a;
  --secondary-light: #1e293b;
  --accent: #b45309;
  --text: #1e293b;
  --text-light: #64748b;
  --text-muted: #94a3b8;
  --bg: #ffffff;
  --bg-light: #f8fafc;
  --bg-dark: #0f172a;
  --border: #e2e8f0;
  --success: #059669;
  --white: #ffffff;
  
  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing */
  --section-padding: 100px 0;
  --container: 1200px;
  
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
  --radius: 12px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

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

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

.text-center {
  text-align: center;
}

.mt-40 {
  margin-top: 40px;
}

/* Typography */
.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 600;
  color: var(--secondary);
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 50px;
}

.section-header {
  margin-bottom: 50px;
}

.lead {
  font-size: 1.125rem;
  color: var(--text-light);
  margin-bottom: 30px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(201, 162, 39, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}

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

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.6);
}

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

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

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

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* ========== HEADER ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition);
}

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

.header-top {
  background: var(--secondary);
  padding: 8px 0;
  font-size: 0.85rem;
}

.header-top-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-contact {
  display: flex;
  gap: 24px;
}

.header-contact a {
  color: rgba(255,255,255,0.85);
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-contact a:hover {
  color: var(--primary);
}

.header-social {
  display: flex;
  gap: 12px;
}

.header-social a {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.8);
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
}

.header-social a:hover {
  background: var(--primary);
  color: var(--secondary);
}

.header-main {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  padding: 12px 0;
  border-bottom: 1px solid transparent;
}

.header.scrolled .header-main {
  border-bottom-color: var(--border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary);
  font-size: 1.2rem;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text strong {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--secondary);
  letter-spacing: 1px;
}

.logo-text span {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  border-radius: 6px;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-dark);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.has-dropdown {
  position: relative;
}

.has-dropdown > a i {
  font-size: 0.7rem;
  margin-left: 4px;
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--white);
  min-width: 200px;
  padding: 10px 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 100;
}

.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown li a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
  color: var(--text);
}

.dropdown li a:hover {
  background: var(--bg-light);
  color: var(--primary-dark);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========== HERO ========== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-slider {
  position: absolute;
  inset: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 700px;
  color: var(--white);
  padding-top: 80px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(201, 162, 39, 0.2);
  border: 1px solid rgba(201, 162, 39, 0.4);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 20px;
  color: var(--primary-light);
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--primary-light);
}

.hero p {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  max-width: 550px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 50px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-item strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--primary-light);
  line-height: 1.2;
}

.stat-item span {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}

.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.hero-scroll a {
  width: 40px;
  height: 40px;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========== ABOUT ========== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-images {
  position: relative;
}

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

.about-img.main img {
  width: 100%;
  height: 450px;
  object-fit: cover;
}

.about-img.secondary {
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 220px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 5px solid var(--white);
}

.about-img.secondary img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.about-experience {
  position: absolute;
  top: 30px;
  left: -20px;
  background: var(--primary);
  color: var(--secondary);
  padding: 20px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow);
}

.about-experience strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  line-height: 1;
}

.about-experience span {
  font-size: 0.85rem;
  font-weight: 600;
}

.about-features {
  margin: 30px 0;
}

.feature-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.feature-icon {
  width: 50px;
  height: 50px;
  min-width: 50px;
  background: rgba(201, 162, 39, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 1.2rem;
}

.feature-item h4 {
  font-size: 1.05rem;
  margin-bottom: 4px;
  color: var(--secondary);
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ========== SERVICES ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.service-img {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.service-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-card:hover .service-img img {
  transform: scale(1.08);
}

.service-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.service-card:hover .service-overlay {
  opacity: 1;
}

.service-content {
  padding: 28px;
}

.service-icon {
  width: 48px;
  height: 48px;
  background: rgba(201, 162, 39, 0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.service-content h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: var(--secondary);
}

.service-content > p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.service-list {
  margin-bottom: 20px;
}

.service-list li {
  font-size: 0.875rem;
  color: var(--text);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-list li i {
  color: var(--success);
  font-size: 0.75rem;
}

.service-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-dark);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-link:hover {
  gap: 10px;
}

.services-extra {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 50px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.extra-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: var(--white);
  border-radius: 50px;
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--secondary);
}

.extra-item i {
  color: var(--primary);
}

/* ========== WHY US ========== */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.why-list {
  margin-top: 30px;
}

.why-item {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
}

.why-number {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary);
  min-width: 40px;
}

.why-item h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
  color: var(--secondary);
}

.why-item p {
  font-size: 0.9rem;
  color: var(--text-light);
}

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

.why-image img {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

.why-badge {
  position: absolute;
  bottom: 30px;
  left: 30px;
  right: 30px;
  background: var(--white);
  padding: 16px 20px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow);
}

.why-badge i {
  width: 48px;
  height: 48px;
  background: rgba(201, 162, 39, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 1.3rem;
}

.why-badge strong {
  display: block;
  font-size: 1rem;
  color: var(--secondary);
}

.why-badge span {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ========== PROJECTS ========== */
.projects-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 10px 24px;
  border: 1px solid var(--border);
  background: var(--white);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.project-img {
  position: relative;
  height: 280px;
  overflow: hidden;
}

.project-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-img img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.9) 0%, rgba(15,23,42,0.2) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-cat {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--primary-light);
  margin-bottom: 6px;
}

.project-overlay h4 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--white);
  margin-bottom: 12px;
}

/* ========== PROCESS ========== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.process-item {
  text-align: center;
  padding: 30px 20px;
  position: relative;
}

.process-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 600;
  color: rgba(201, 162, 39, 0.15);
  line-height: 1;
  margin-bottom: 10px;
}

.process-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary);
  font-size: 1.5rem;
  margin: 0 auto 20px;
  box-shadow: 0 8px 25px rgba(201, 162, 39, 0.3);
}

.process-item h4 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--secondary);
}

.process-item p {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ========== CTA ========== */
.cta {
  padding: 80px 0;
}

.cta-box {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
  border-radius: 20px;
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(201,162,39,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--white);
  margin-bottom: 12px;
}

.cta-content p {
  color: rgba(255,255,255,0.8);
  margin-bottom: 30px;
  font-size: 1.1rem;
}

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

/* ========== TESTIMONIALS ========== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

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

.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.testimonial-stars {
  color: var(--primary);
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.testimonial-card > p {
  font-size: 0.95rem;
  color: var(--text);
  font-style: italic;
  margin-bottom: 24px;
  line-height: 1.8;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary);
  font-weight: 700;
  font-size: 1.1rem;
}

.testimonial-author strong {
  display: block;
  font-size: 0.95rem;
  color: var(--secondary);
}

.testimonial-author span {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* ========== CONTACT ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-items {
  margin: 30px 0;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background: rgba(201, 162, 39, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 1.1rem;
}

.contact-item h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
  color: var(--secondary);
}

.contact-item p,
.contact-item a {
  font-size: 0.9rem;
  color: var(--text-light);
}

.contact-item a:hover {
  color: var(--primary-dark);
}

.contact-map {
  margin-top: 20px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.contact-form-wrapper {
  background: var(--white);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.contact-form h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 8px;
  color: var(--secondary);
}

.form-desc {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text);
  transition: var(--transition);
  background: var(--bg-light);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.15);
  background: var(--white);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ========== FOOTER ========== */
.footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.8);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand .logo-text strong {
  color: var(--white);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

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

.footer-social a:hover {
  background: var(--primary);
  color: var(--secondary);
}

.footer-links h4,
.footer-contact h4 {
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
}

.footer-links ul li a:hover {
  color: var(--primary);
  padding-left: 5px;
}

.footer-contact ul li {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.footer-contact ul li i {
  color: var(--primary);
  margin-top: 3px;
  min-width: 16px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  text-align: center;
}

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

/* ========== FLOATING BUTTONS ========== */
.floating-buttons {
  position: fixed;
  bottom: 30px;
  right: 25px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}

.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: var(--transition);
  position: relative;
  font-size: 1.3rem;
  color: var(--white);
}

.float-btn:hover {
  transform: scale(1.1);
}

.float-call {
  background: linear-gradient(135deg, #059669, #047857);
  animation: pulse-call 2s infinite;
}

.float-zalo {
  background: #0068ff;
}

.float-zalo img {
  width: 28px;
  height: 28px;
  filter: brightness(0) invert(1);
}

.float-fb {
  background: #1877f2;
}

.float-tooltip {
  position: absolute;
  right: 70px;
  background: var(--secondary);
  color: var(--white);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  pointer-events: none;
}

.float-tooltip::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--secondary);
}

.float-btn:hover .float-tooltip {
  opacity: 1;
  visibility: visible;
}

@keyframes pulse-call {
  0% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.5); }
  70% { box-shadow: 0 0 0 15px rgba(5, 150, 105, 0); }
  100% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0); }
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  left: 25px;
  width: 44px;
  height: 44px;
  background: var(--secondary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 998;
  box-shadow: var(--shadow);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary);
  color: var(--secondary);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .services-grid,
  .projects-grid,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .about-img.secondary {
    right: 0;
    width: 180px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 70px 0;
  }
  
  .header-top {
    display: none;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 30px 30px;
    box-shadow: var(--shadow-lg);
    transition: right 0.3s ease;
    z-index: 1001;
    gap: 0;
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-link {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
  }
  
  .nav-link.active::after {
    display: none;
  }
  
  .has-dropdown .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0 0 0 15px;
    display: none;
  }
  
  .has-dropdown.open .dropdown {
    display: block;
  }
  
  .nav-toggle {
    display: flex;
    z-index: 1002;
  }
  
  .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);
  }
  
  .nav-actions .btn {
    display: none;
  }
  
  .hero {
    min-height: 600px;
  }
  
  .hero-stats {
    gap: 24px;
  }
  
  .about-grid,
  .why-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .about-img.secondary {
    display: none;
  }
  
  .about-experience {
    left: 10px;
    top: auto;
    bottom: 20px;
  }
  
  .services-grid,
  .projects-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .process-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .cta-box {
    padding: 40px 24px;
  }
  
  .floating-buttons {
    bottom: 20px;
    right: 15px;
  }
  
  .float-btn {
    width: 50px;
    height: 50px;
  }
  
  .back-to-top {
    left: 15px;
    bottom: 20px;
  }
}

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