/* ===================================================================
   CÔNG TY TNHH LÊ PHƯƠNG THẢO - MODERN DESIGN SYSTEM 2026
   Chuyên nghiệp - Đẳng cấp - Đậm chất kỹ thuật & xây dựng hiện đại
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@500;700&display=swap');

:root {
  /* Brand Colors */
  --primary: #0a192f;           /* Deep Marine Blue */
  --primary-light: #172a45;     /* Medium Navy */
  --primary-hover: #1e3a63;
  --accent: #f97316;            /* Vibrant Safety Orange */
  --accent-hover: #ea580c;
  --accent-light: #ffedd5;
  --secondary: #0284c7;         /* Industrial Cyan/Blue */
  --success: #10b981;
  --warning: #f59e0b;
  
  /* Neutral Palette */
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-dark: #0f172a;
  --bg-dark-card: #1e293b;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  --border-light: #e2e8f0;
  --border-dark: #334155;

  /* Typography */
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: 'Space Grotesk', monospace;

  /* Elevation & Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 35px -10px rgba(15, 23, 42, 0.12), 0 10px 15px -8px rgba(15, 23, 42, 0.06);
  --shadow-orange: 0 10px 25px -5px rgba(249, 115, 22, 0.35);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset */
*, *::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-main);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 85px 0;
  position: relative;
}

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

.section-alt {
  background-color: #f1f5f9;
}

/* Section Header Component */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 55px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  border: 1px solid rgba(249, 115, 22, 0.2);
}

.section-dark .section-tag {
  background: rgba(249, 115, 22, 0.15);
  color: #fb923c;
  border-color: rgba(249, 115, 22, 0.3);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.section-dark .section-subtitle {
  color: var(--text-light);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  color: #ffffff;
  box-shadow: var(--shadow-orange);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #fb923c 0%, #ea580c 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -5px rgba(249, 115, 22, 0.45);
  color: #fff;
}

.btn-navy {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

.btn-navy:hover {
  background-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

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

.btn-outline:hover {
  border-color: var(--primary);
  background-color: rgba(10, 25, 47, 0.04);
}

.btn-outline-white {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* ================= TOPBAR & HEADER ================= */
.topbar {
  background-color: #060e1d;
  color: var(--text-light);
  font-size: 0.825rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.topbar-left, .topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.topbar-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.topbar-item svg {
  color: var(--accent);
}

.topbar-item a:hover {
  color: var(--text-white);
}

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.98);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--primary);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.brand-tagline {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: nowrap;
}

.nav-link {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-main);
  position: relative;
  padding: 6px 3px;
  white-space: nowrap;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--accent);
  transition: width 0.25s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--primary);
  padding: 8px;
}

/* ================= HERO SECTION ================= */
.hero {
  position: relative;
  background: radial-gradient(circle at 80% 20%, rgba(2, 132, 199, 0.15) 0%, transparent 40%),
              radial-gradient(circle at 10% 80%, rgba(249, 115, 22, 0.1) 0%, transparent 35%),
              linear-gradient(135deg, #071224 0%, #0d1e38 50%, #112240 100%);
  color: var(--text-white);
  padding: 100px 0 110px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 700;
  color: #fdba74;
  margin-bottom: 22px;
  backdrop-filter: blur(8px);
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.3);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.hero-title .text-gradient {
  background: linear-gradient(135deg, #fdba74 0%, #f97316 60%, #fb923c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.125rem;
  color: #cbd5e1;
  line-height: 1.7;
  margin-bottom: 35px;
  max-width: 580px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 45px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 800;
  color: #f97316;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.8rem;
  color: #94a3b8;
  margin-top: 4px;
}

/* Hero Showcase Card */
.hero-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--bg-dark-card);
}

.hero-card-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-card:hover .hero-card-img {
  transform: scale(1.04);
}

.hero-card-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 30px 24px 20px;
  background: linear-gradient(to top, rgba(7, 18, 36, 0.95) 0%, rgba(7, 18, 36, 0.6) 60%, transparent 100%);
  color: #fff;
}

.hero-card-tag {
  background: var(--accent);
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 8px;
}

.hero-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.hero-card-desc {
  font-size: 0.85rem;
  color: #cbd5e1;
}

.hero-card-pill {
  position: absolute;
  top: 18px;
  right: 18px;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* ================= TRUST BADGES / PARTNERS ================= */
.partners-bar {
  background: #ffffff;
  padding: 30px 0;
  border-bottom: 1px solid var(--border-light);
}

.partners-title {
  text-align: center;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 22px;
}

.partners-track {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: 30px;
}

.partner-logo-item {
  font-size: 1.15rem;
  font-weight: 800;
  color: #64748b;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  background: #f8fafc;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.partner-logo-item:hover {
  color: var(--primary);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* ================= SERVICES SECTION ================= */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: transparent;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(249, 115, 22, 0.3);
}

.service-card:hover::before {
  background: linear-gradient(90deg, #f97316, #0284c7);
}

.service-icon-box {
  width: 62px;
  height: 62px;
  border-radius: var(--radius-md);
  background: #fff7ed;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  transition: var(--transition);
}

.service-card:hover .service-icon-box {
  background: var(--accent);
  color: #fff;
  transform: scale(1.08);
}

.service-card-title {
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  line-height: 1.35;
}

.service-card-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.service-features {
  margin-bottom: 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-main);
  font-weight: 500;
}

.service-feature-item svg {
  color: var(--success);
  flex-shrink: 0;
}

.service-footer {
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.service-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-link:hover {
  gap: 10px;
  color: var(--accent-hover);
}

/* ================= INTERACTIVE COST ESTIMATOR ================= */
.calculator-box {
  background: #ffffff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-light);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
}

.calculator-left {
  padding: 45px 40px;
}

.calculator-right {
  background: linear-gradient(135deg, #0a192f 0%, #172a45 100%);
  color: #ffffff;
  padding: 45px 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.calc-group {
  margin-bottom: 26px;
}

.calc-label {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--primary);
  margin-bottom: 10px;
}

.calc-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.calc-radio-card {
  position: relative;
}

.calc-radio-card input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.calc-card-ui {
  display: block;
  padding: 14px 16px;
  background: #f8fafc;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

.calc-radio-card input:checked + .calc-card-ui {
  border-color: var(--accent);
  background: #fff7ed;
  color: var(--accent-hover);
}

.calc-range-wrapper {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 10px;
}

.calc-slider {
  flex-grow: 1;
  height: 8px;
  border-radius: var(--radius-full);
  background: #e2e8f0;
  outline: none;
  -webkit-appearance: none;
  accent-color: var(--accent);
}

.calc-num-input {
  width: 130px;
  padding: 10px 14px;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1.05rem;
  text-align: right;
  color: var(--primary);
}

.calc-num-input:focus {
  border-color: var(--accent);
  outline: none;
}

.calc-result-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #94a3b8;
  margin-bottom: 6px;
}

.calc-result-value {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 800;
  color: #fdba74;
  line-height: 1.1;
  margin-bottom: 6px;
}

.calc-result-unit {
  font-size: 0.85rem;
  color: #94a3b8;
  margin-bottom: 25px;
}

.calc-breakdown {
  background: rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 25px;
  font-size: 0.875rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.calc-breakdown-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
}

.calc-breakdown-row:last-child {
  border-bottom: none;
}

/* ================= PROJECTS SHOWCASE SECTION ================= */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 45px;
}

.filter-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--border-light);
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

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

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.project-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.project-thumb-box {
  position: relative;
  height: 240px;
  overflow: hidden;
  background-color: #0f172a;
}

.project-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover .project-thumb {
  transform: scale(1.08);
}

.project-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.project-info {
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.35;
}

.project-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.project-meta-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.project-meta-row svg {
  color: var(--accent);
  flex-shrink: 0;
}

.project-btn-detail {
  margin-top: auto;
  width: 100%;
  padding: 10px;
  background: #f8fafc;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--transition);
}

.project-card:hover .project-btn-detail {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

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

.about-visual {
  position: relative;
}

.about-main-img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.about-floating-card {
  position: absolute;
  bottom: -25px;
  right: -25px;
  background: #ffffff;
  padding: 24px 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-light);
  max-width: 260px;
}

.about-floating-card .big-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.about-floating-card p {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 4px;
}

.about-quote-box {
  background: #fff7ed;
  border-left: 4px solid var(--accent);
  padding: 18px 22px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  font-style: italic;
  color: #9a3412;
  font-size: 0.95rem;
}

.director-info {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 25px;
}

.director-avatar {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
}

.director-name {
  font-weight: 800;
  color: var(--primary);
  font-size: 1.05rem;
}

.director-title {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ================= 4-STEP PROCESS ================= */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process-grid::before {
  content: '';
  position: absolute;
  top: 45px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: rgba(255, 255, 255, 0.15);
  z-index: 1;
}

.process-card {
  position: relative;
  z-index: 2;
  text-align: center;
}

.process-step-num {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #1e293b;
  border: 3px solid var(--accent);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 auto 20px;
  box-shadow: 0 0 0 6px rgba(249, 115, 22, 0.2);
  transition: var(--transition);
}

.process-card:hover .process-step-num {
  background: var(--accent);
  transform: scale(1.1);
}

.process-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.process-desc {
  font-size: 0.875rem;
  color: #94a3b8;
  line-height: 1.6;
}

/* ================= CONTACT SECTION ================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: start;
}

.contact-info-card {
  background: linear-gradient(135deg, #0a192f 0%, #172a45 100%);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: 45px 36px;
  box-shadow: var(--shadow-xl);
}

.contact-info-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.contact-info-desc {
  font-size: 0.95rem;
  color: #cbd5e1;
  margin-bottom: 35px;
  line-height: 1.6;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-bottom: 40px;
}

.contact-channel-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-channel-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(249, 115, 22, 0.15);
  color: #fb923c;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-channel-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #94a3b8;
  font-weight: 600;
}

.contact-channel-val {
  font-size: 0.98rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 2px;
}

/* Contact Form */
.contact-form-box {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 45px 40px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-light);
}

.form-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 24px;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full {
  grid-column: span 2;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-main);
}

.form-control {
  padding: 12px 16px;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  background: #f8fafc;
  color: var(--text-main);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.12);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

/* ================= FOOTER ================= */
.footer {
  background-color: #050b14;
  color: #94a3b8;
  padding: 80px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-logo img {
  height: 48px;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 4px;
}

.footer-logo-title {
  font-weight: 800;
  color: #fff;
  font-size: 1.15rem;
}

.footer-desc {
  line-height: 1.65;
  margin-bottom: 24px;
  color: #94a3b8;
}

.footer-heading {
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 22px;
  position: relative;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a:hover {
  color: #fff;
  transform: translateX(4px);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.825rem;
}

/* ================= FLOATING CONTACT WIDGETS ================= */
.floating-actions {
  position: fixed;
  bottom: 30px;
  right: 25px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 999;
}

.floating-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

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

.floating-phone {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  animation: phoneRing 3s infinite;
}

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

.floating-top {
  background: var(--primary);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.floating-top.show {
  opacity: 1;
  visibility: visible;
}

@keyframes phoneRing {
  0% { transform: rotate(0) scale(1); }
  5% { transform: rotate(20deg) scale(1.08); }
  10% { transform: rotate(-20deg) scale(1.08); }
  15% { transform: rotate(20deg) scale(1.08); }
  20% { transform: rotate(0) scale(1); }
  100% { transform: rotate(0) scale(1); }
}

/* ================= MODAL COMPONENT ================= */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(10, 25, 47, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: #ffffff;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
  position: relative;
  transform: translateY(20px);
  transition: var(--transition);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.2rem;
  z-index: 10;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.modal-close:hover {
  background: #f97316;
  color: #fff;
}

/* ================= RESPONSIVE STYLES ================= */
@media (max-width: 1100px) {
  .services-grid, .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .calculator-box {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 1160px) {
  .header {
    height: 72px;
  }
  .navbar {
    height: 72px;
  }
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    padding: 30px 24px;
    gap: 20px;
    box-shadow: var(--shadow-xl);
    border-top: 1px solid var(--border-light);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }
  .nav-menu.open {
    transform: translateY(0);
  }
  .mobile-toggle {
    display: block;
  }
  .nav-actions .btn-navy {
    display: none;
  }
}

@media (max-width: 860px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-card {
    display: none;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  .about-floating-card {
    right: 10px;
    bottom: -15px;
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }
  .process-grid::before {
    display: none;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-group.full {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .services-grid, .projects-grid {
    grid-template-columns: 1fr;
  }
  .calc-options {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2rem;
  }
  .section {
    padding: 60px 0;
  }
}