/* ==========================================================================
   DUY HIỀN DIGITAL — CORE STYLESHEET
   Brand Growth & MarTech Firm | duyhiendigi.com
   ========================================================================== */

:root {
  --bg-dark: #070b14;
  --bg-surface: #0d1424;
  --bg-surface-alt: #111a30;
  --bg-card: rgba(16, 24, 43, 0.78);
  --bg-card-hover: rgba(26, 38, 68, 0.95);
  --primary-blue: #0066ff;
  --primary-light: #3b82f6;
  --primary-dark: #004ecc;
  --accent-cyan: #00d2ff;
  --accent-orange: #ff7a1a;
  --accent-gold: #f59e0b;
  --accent-emerald: #10b981;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 102, 255, 0.35);
  --border-highlight: rgba(0, 210, 255, 0.3);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', var(--font-body);
  --font-serif: 'Playfair Display', Georgia, serif;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(0, 102, 255, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 25%, rgba(0, 210, 255, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 75%, rgba(255, 122, 26, 0.06) 0%, transparent 50%);
  background-attachment: fixed;
}

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

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ================= TYPOGRAPHY & HEADINGS ================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: #ffffff;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 30%, #a5c7ff 70%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-orange {
  background: linear-gradient(135deg, #ff9e42 0%, var(--accent-orange) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(0, 102, 255, 0.12);
  border: 1px solid rgba(0, 102, 255, 0.35);
  color: #70aaff;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-pill.orange {
  background: rgba(255, 122, 26, 0.12);
  border-color: rgba(255, 122, 26, 0.35);
  color: #ff9e42;
}

.badge-pill.emerald {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.35);
  color: #34d399;
}

/* ================= BUTTONS ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark) 100%);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(0, 102, 255, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-blue) 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 102, 255, 0.45);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-orange) 0%, #ea580c 100%);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(255, 122, 26, 0.35);
}

.btn-accent:hover {
  background: linear-gradient(135deg, #ff9e42 0%, var(--accent-orange) 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 122, 26, 0.45);
  color: #ffffff;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13.5px;
}

.btn-lg {
  padding: 16px 34px;
  font-size: 16px;
}

/* ================= SECTION LAYOUTS ================= */
.section-spacing {
  padding: 90px 0;
}

.section-head {
  text-align: center;
  max-width: 840px;
  margin: 0 auto 60px auto;
}

.section-head .badge-pill {
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(28px, 3.8vw, 42px);
  margin-bottom: 16px;
}

.section-head p {
  font-size: 16.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ================= HEADER & NAVIGATION ================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.brand-logo .logo-symbol {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 22px;
  font-weight: 800;
  box-shadow: 0 4px 18px rgba(0, 102, 255, 0.45);
}

.brand-logo span.tag {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(0, 210, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 210, 255, 0.3);
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 22px;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: #cbd5e1;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Nav Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 1100;
}

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

.dropdown-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.dropdown-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
}

.dropdown-link i {
  color: var(--accent-cyan);
  width: 16px;
  height: 16px;
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 24px;
  cursor: pointer;
  padding: 6px;
}

/* Mobile Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(7, 11, 20, 0.98);
  backdrop-filter: blur(25px);
  z-index: 999;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px);
  transition: var(--transition);
}

.mobile-nav-drawer.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-nav-link {
  font-size: 17px;
  font-weight: 600;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--accent-cyan);
  background: rgba(0, 210, 255, 0.08);
}

/* ================= PAGE BANNER / HERO ================= */
.page-banner {
  padding: 150px 0 70px 0;
  position: relative;
  overflow: hidden;
  text-align: center;
  background: linear-gradient(180deg, rgba(13, 20, 36, 0.8) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-subtle);
}

.page-banner .breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.page-banner .breadcrumb a {
  color: var(--text-muted);
}

.page-banner .breadcrumb a:hover {
  color: var(--accent-cyan);
}

.page-banner h1 {
  font-size: clamp(32px, 4.5vw, 54px);
  font-weight: 800;
  margin-bottom: 18px;
}

.page-banner p.banner-desc {
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ================= HERO STAGE (HOMEPAGE) ================= */
.hero-section {
  padding: 165px 0 95px 0;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.hero-glow-sphere {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.18) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(60px);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(38px, 5.5vw, 68px);
  font-weight: 800;
  line-height: 1.15;
  margin: 24px 0 24px 0;
}

.hero-subtitle {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 40px auto;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* ================= STATS SECTION ================= */
.stats-section {
  padding: 50px 0;
  background: rgba(13, 20, 36, 0.7);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

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

.stat-card {
  text-align: center;
  padding: 20px;
}

.stat-number {
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
  font-family: var(--font-heading);
}

.stat-label {
  font-size: 14.5px;
  color: var(--text-muted);
  font-weight: 500;
}

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

.framework-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.framework-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 102, 255, 0.15);
  background: var(--bg-card-hover);
}

.framework-step-letter {
  font-size: 38px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.12);
  position: absolute;
  top: 24px;
  right: 28px;
  font-family: var(--font-heading);
}

.framework-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(0, 102, 255, 0.12);
  border: 1px solid rgba(0, 102, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--accent-cyan);
}

.framework-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.framework-card p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.65;
}

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

.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.solution-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  background: var(--bg-card-hover);
}

.solution-pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(0, 210, 255, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.solution-card h3 {
  font-size: 22px;
  margin-bottom: 14px;
}

.solution-card p {
  color: var(--text-muted);
  font-size: 14.5px;
  margin-bottom: 24px;
  flex-grow: 1;
  line-height: 1.65;
}

.solution-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: #70aaff;
  transition: var(--transition);
}

.solution-link:hover {
  color: #ffffff;
  gap: 12px;
}

/* ================= SERVICES SECTION ================= */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.service-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-orange);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 210, 255, 0.1);
  border: 1px solid rgba(0, 210, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 18px;
}

.service-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

.service-deliverables {
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 13px;
  color: #cbd5e1;
  margin-bottom: 20px;
}

.service-deliverables strong {
  color: #ffffff;
  display: block;
  margin-bottom: 4px;
}

/* ================= CASE STUDIES ================= */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.case-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.case-header-bar {
  height: 120px;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.25), rgba(0, 210, 255, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.case-badge-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #ffffff;
  text-align: center;
}

.case-body {
  padding: 28px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.case-tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-orange);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.case-body h4 {
  font-size: 18px;
  margin-bottom: 12px;
  line-height: 1.4;
}

.case-body p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.case-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  font-size: 13px;
  color: #93c5fd;
}

/* ================= INDUSTRIES GRID ================= */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.industry-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.industry-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.industry-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 102, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 18px;
}

.industry-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.industry-card p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

/* ================= CORE VALUES ================= */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}

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

.value-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(0, 102, 255, 0.12);
  border: 1px solid rgba(0, 102, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px auto;
  color: var(--accent-cyan);
}

.value-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.value-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ================= ARTICLES / INSIGHTS GRID ================= */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.article-thumb {
  height: 180px;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.2), rgba(0, 210, 255, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}

.article-body {
  padding: 26px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.article-body h3 {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-read-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: #70aaff;
}

.article-read-btn:hover {
  color: #ffffff;
  gap: 12px;
}

/* ================= CTA BANNER ================= */
.cta-banner {
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.16) 0%, rgba(0, 210, 255, 0.08) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  margin: 60px 0;
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  margin-bottom: 16px;
}

.cta-banner p {
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 30px auto;
  font-size: 16px;
}

/* ================= BOOKING & CONTACT FORM ================= */
.booking-section {
  padding: 90px 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
}

.booking-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}

.booking-info h2 {
  font-size: 36px;
  margin-bottom: 20px;
}

.booking-info p.lead {
  font-size: 16.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 30px;
}

.booking-steps-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 36px;
}

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

.step-num-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 102, 255, 0.2);
  border: 1px solid rgba(0, 102, 255, 0.5);
  color: #60a5fa;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
}

.step-content h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.step-content p {
  font-size: 14px;
  color: var(--text-muted);
}

.office-info-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 24px;
}

.office-info-box h4 {
  font-size: 16px;
  margin-bottom: 14px;
  color: var(--accent-cyan);
}

.office-item {
  margin-bottom: 14px;
  font-size: 14px;
  color: #cbd5e1;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.office-item i {
  color: var(--primary-light);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
}

.booking-form-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}

.booking-form-box h3 {
  font-size: 24px;
  margin-bottom: 8px;
}

.booking-form-box p.form-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

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

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

.form-label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #e2e8f0;
}

.form-control {
  width: 100%;
  background: rgba(10, 15, 29, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 14.5px;
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.25);
  background: rgba(13, 20, 36, 0.95);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
}

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

/* ================= FOOTER ================= */
.site-footer {
  background: #04060a;
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 40px 0;
  font-size: 14px;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  margin: 16px 0 24px 0;
  line-height: 1.7;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

/* ================= MODAL & POPUP ================= */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(4, 6, 10, 0.85);
  backdrop-filter: blur(16px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

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

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  max-width: 620px;
  width: 100%;
  padding: 40px;
  position: relative;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.8);
  transform: translateY(20px);
  transition: var(--transition);
}

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

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 22px;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close-btn:hover {
  color: #ffffff;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .framework-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .booking-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions .btn { display: none; }
  .mobile-menu-btn { display: block; }
  .stats-grid { grid-template-columns: 1fr; }
  .framework-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .industries-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .booking-form-box { padding: 28px 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}