/* ============================================
   Rivovibe — Premium Design System
   ============================================ */

:root {
  /* Brand palette */
  --blue-50: #f0f7ff;
  --blue-100: #dcecff;
  --blue-200: #b9ddff;
  --blue-300: #7cc4ff;
  --blue-400: #0b8fe8;
  --blue-500: #0078ff;
  --blue-600: #0066db;
  --cyan: #00b7ff;
  --cyan-light: #00c6ff;
  --navy-900: #062957;
  --navy-800: #0b1b33;
  --navy-700: #07315f;
  --gray-50: #f8fafc;
  --gray-500: #64748b;
  --gray-600: #475569;
  --white: #ffffff;
  --whatsapp: #25d366;
  --whatsapp-dark: #1da851;

  /* Elevation */
  --shadow-sm: 0 1px 3px rgba(6, 41, 87, 0.06), 0 1px 2px rgba(6, 41, 87, 0.04);
  --shadow-md: 0 8px 24px rgba(6, 41, 87, 0.08);
  --shadow-lg: 0 20px 50px rgba(6, 41, 87, 0.12);
  --shadow-blue: 0 8px 28px rgba(0, 120, 255, 0.28);

  /* Shape & motion */
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.25s var(--ease);
  --transition-slow: 0.45s var(--ease);

  /* Layout */
  --font: 'Cairo', Tahoma, Arial, sans-serif;
  --container: 1140px;
  --header-h: 72px;
  --section-y: clamp(72px, 10vw, 112px);

  /* Glass (used sparingly) */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(220, 236, 255, 0.65);
  --gradient-navy: linear-gradient(135deg, var(--navy-900) 0%, #0a3d6e 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--navy-800);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-y) 0;
  content-visibility: auto;
  contain-intrinsic-size: auto 600px;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto clamp(48px, 6vw, 72px);
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-400);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.625rem);
  font-weight: 800;
  color: var(--navy-900);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-title-en {
  display: block;
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 600;
  color: var(--gray-500);
  margin-top: 8px;
  direction: ltr;
}

.section-desc {
  font-size: 17px;
  color: var(--gray-600);
  line-height: 1.8;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    background var(--transition),
    border-color var(--transition),
    color var(--transition);
  white-space: nowrap;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-500) 0%, var(--cyan) 100%);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(0, 120, 255, 0.34);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 16px rgba(0, 120, 255, 0.28);
}

.btn-light {
  background: rgba(255, 255, 255, 0.95);
  color: var(--navy-800);
  border-color: rgba(255, 255, 255, 0.4);
}

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

.btn-light:active {
  transform: translateY(0);
}

.btn-whatsapp {
  background: var(--whatsapp);
  color: var(--white);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.32);
}

.btn-whatsapp:hover {
  background: #2ee06a;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(37, 211, 102, 0.38);
}

.btn-whatsapp:active {
  background: var(--whatsapp-dark);
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.28);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

/* ---- Header ---- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10001;
  padding: 10px 20px;
  background: var(--navy-900);
  color: var(--white);
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  transition: top var(--transition);
}

.skip-link:focus {
  top: 12px;
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: box-shadow var(--transition), background var(--transition);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

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

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

.nav-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-600);
  transition: color var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  right: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue-500), var(--cyan));
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--navy-900);
}

.nav-link:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 4px;
  border-radius: 4px;
}

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

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-cta .btn {
  padding: 10px 20px;
  font-size: 14px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--navy-800);
  transition: background var(--transition);
}

.menu-toggle:hover {
  background: var(--blue-50);
}

.menu-toggle:active {
  background: var(--blue-100);
}

.menu-toggle:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 2px;
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 40px) 0 80px;
  overflow: hidden;
  content-visibility: visible;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(0, 120, 255, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(0, 183, 255, 0.06) 0%, transparent 50%),
    linear-gradient(180deg, var(--blue-50) 0%, var(--white) 50%, var(--gray-50) 100%);
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--blue-400);
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--navy-900);
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
}

.hero-title-en {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  direction: ltr;
  text-align: right;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 18px;
  color: var(--gray-600);
  line-height: 1.85;
  margin-bottom: 36px;
  max-width: 540px;
}

.hero-desc-en {
  font-size: 15px;
  color: var(--gray-500);
  direction: ltr;
  text-align: right;
  margin-top: -20px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrap {
  position: relative;
  width: 100%;
  max-width: 480px;
}

.hero-banner {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--blue-100);
  animation: float 6s ease-in-out infinite;
}

.hero-logo-float {
  position: absolute;
  bottom: -28px;
  left: -28px;
  width: 132px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 14px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--glass-border);
  animation: float 5s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.hero-glow {
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 120, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
}

/* ---- About ---- */
.about {
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.about-card {
  background: var(--gray-50);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.about-card-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  margin-bottom: 20px;
}

.about-card-icon svg {
  width: 26px;
  height: 26px;
}

.about-card h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--navy-900);
  margin-bottom: 12px;
}

.about-card p {
  font-size: 16px;
  color: var(--gray-600);
  line-height: 1.85;
}

.about-intro {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px;
  background: var(--gradient-navy);
  border-radius: var(--radius-xl);
  color: var(--white);
}

.about-intro h3 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
}

.about-intro p {
  font-size: 17px;
  opacity: 0.9;
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.85;
}

.about-intro .location {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
}

/* ---- Services ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: default;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-300);
}

.service-icon {
  width: 48px;
  height: 48px;
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  margin-bottom: 16px;
  transition: background var(--transition), color var(--transition);
}

.service-card:hover .service-icon {
  background: linear-gradient(135deg, var(--blue-500), var(--cyan));
  color: var(--white);
  border-color: transparent;
}

.service-icon svg {
  width: 24px;
  height: 24px;
}

.service-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 8px;
}

.service-card p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ---- Our Work ---- */
.work {
  background: var(--gray-50);
}

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

.work-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  min-height: 100%;
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.work-card:hover {
  border-color: var(--blue-200);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.work-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  margin-bottom: 24px;
  object-fit: cover;
  box-shadow: 0 4px 14px rgba(6, 41, 87, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.work-card__name {
  font-size: 1.1875rem;
  font-weight: 800;
  color: var(--navy-900);
  margin-bottom: 10px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.work-card__desc {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.75;
  margin-bottom: 12px;
}

.work-card__category {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--blue-400);
  direction: ltr;
  text-align: right;
  margin-bottom: 20px;
}

.work-card__services {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding-top: 20px;
  margin-bottom: 24px;
  border-top: 1px solid var(--blue-100);
}

.work-card__services li {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 5px 12px;
  background: var(--gray-50);
  color: var(--navy-700);
  border-radius: var(--radius-full);
  border: 1px solid var(--blue-100);
  direction: ltr;
}

.work-card__view {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--blue-500);
  direction: ltr;
  transition: color var(--transition), gap var(--transition);
}

.work-card__view span {
  transition: transform var(--transition);
}

.work-card__view:hover {
  color: var(--blue-600);
}

.work-card__view:hover span {
  transform: translateX(4px);
}

.work-card__view:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ---- Process ---- */
.process-timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  list-style: none;
}

.process-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  right: 27px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-500), var(--cyan));
  border-radius: 2px;
}

.process-step {
  position: relative;
  padding-right: 72px;
  padding-bottom: 48px;
}

.process-step:last-child {
  padding-bottom: 0;
}

.process-number {
  position: absolute;
  right: 0;
  top: 0;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  box-shadow: var(--shadow-blue);
  z-index: 1;
}

.process-content {
  background: var(--white);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.process-step:hover .process-content {
  transform: translateX(-4px);
  box-shadow: var(--shadow-md);
}

.process-content h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--navy-900);
  margin-bottom: 8px;
}

.process-content p {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ---- Why ---- */
.why {
  background: var(--white);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.why-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--gray-50);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.why-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
}

.why-icon svg {
  width: 28px;
  height: 28px;
}

.why-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 8px;
}

.why-card p {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ---- Stats ---- */
.stats {
  background: var(--gradient-navy);
  padding: 80px 0;
  content-visibility: visible;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  color: var(--white);
}

.stat-number {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--white), var(--cyan-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 16px;
  font-weight: 600;
  opacity: 0.85;
}

.stat-label-en {
  display: block;
  font-size: 13px;
  opacity: 0.6;
  direction: ltr;
  margin-top: 4px;
}

/* ---- Technologies ---- */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--white);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 700;
  color: var(--navy-700);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.tech-badge:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  border-color: var(--blue-300);
}

.tech-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-500);
}

/* ---- FAQ ---- */
.faq {
  background: var(--white);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--gray-50);
  transition: box-shadow var(--transition);
}

.faq-item.active {
  box-shadow: var(--shadow-sm);
  background: var(--white);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--navy-900);
  text-align: right;
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--blue-500);
}

.faq-question:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: -2px;
}

.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: var(--blue-50);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  transition: transform var(--transition), background var(--transition);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  background: var(--blue-500);
  color: var(--white);
}

.faq-icon svg {
  width: 14px;
  height: 14px;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.8;
}

/* ---- Contact ---- */
.contact {
  position: relative;
  overflow: hidden;
}

.contact-box {
  background: linear-gradient(135deg, var(--navy-900) 0%, #0a3d6e 50%, var(--blue-600) 100%);
  border-radius: var(--radius-xl);
  padding: 72px 48px;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.contact-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 183, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.contact-box::after {
  content: '';
  position: absolute;
  bottom: -40%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 120, 255, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.contact-box > * {
  position: relative;
  z-index: 1;
}

.contact-box h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.contact-box .subtitle {
  font-size: 17px;
  opacity: 0.85;
  margin-bottom: 40px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 32px;
}

.contact-info {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  font-size: 15px;
  opacity: 0.8;
}

.contact-info a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: opacity var(--transition);
}

.contact-info a:hover {
  opacity: 1;
}

/* ---- Footer ---- */
.footer {
  background: var(--navy-900);
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand img {
  height: 42px;
  width: auto;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  opacity: 0.7;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}

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

.footer-col a {
  font-size: 14px;
  opacity: 0.7;
  transition: opacity var(--transition), color var(--transition);
}

.footer-col a:hover {
  opacity: 1;
  color: var(--cyan);
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
}

.footer-social a:hover {
  background: var(--blue-500);
  transform: translateY(-2px);
}

.footer-social a:active {
  transform: translateY(0);
}

.footer-social svg {
  width: 18px;
  height: 18px;
  fill: var(--white);
}

.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;
  font-size: 13px;
  opacity: 0.6;
  direction: ltr;
}

/* ---- Animations ---- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---- Mobile Nav ---- */
.mobile-nav {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 999;
  padding: 24px;
  flex-direction: column;
  gap: 4px;
  visibility: hidden;
  opacity: 0;
  transform: translateX(100%);
  transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
}

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

.mobile-nav-link {
  display: block;
  padding: 14px 16px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--navy-900);
  border-radius: var(--radius-md);
  transition: background var(--transition), color var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: var(--blue-50);
  color: var(--blue-500);
}

.mobile-nav-cta {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-cta .btn {
  width: 100%;
}

.footer-col a:focus-visible,
.mobile-nav-link:focus-visible,
.contact-info a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .nav {
    gap: 20px;
  }

  .nav-link {
    font-size: 13px;
  }

  .header-cta .btn {
    padding: 9px 16px;
    font-size: 13px;
  }
}
@media (min-width: 1200px) {
  .work-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 1024px) {
  .work-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .nav,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .mobile-nav {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-desc,
  .hero-desc-en {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }

  .hero-title-en {
    text-align: center;
  }

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

  .hero-logo-float {
    width: 100px;
    bottom: -20px;
    left: -10px;
    padding: 10px;
  }

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

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-box {
    padding: 48px 24px;
  }

  .contact-actions .btn {
    width: 100%;
  }

  .footer-bottom {
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-actions .btn {
    width: 100%;
  }

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

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

  .about-intro {
    padding: 32px 24px;
  }
}

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}