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

:root {
  --navy: #0b1a30;
  --navy-light: #0f2544;
  --blue: #2563eb;
  --blue-hover: #1d4ed8;
  --blue-light: #dbeafe;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  transition: var(--transition);
}

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

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  text-decoration: none;
}

.logo-img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--gray-600);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--blue);
}

.nav-cta {
  background: var(--blue);
  color: var(--white) !important;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: var(--blue-hover);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: var(--transition);
}

.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);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 120px 0 80px;
  background: var(--navy);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient);
  opacity: 0.15;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(to top, var(--white), transparent);
}

.hero-content {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 48px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.9);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
}

.hero h1 {
  font-size: clamp(1.75rem, 6vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  color: rgba(255, 255, 255, 0.75);
  max-width: 550px;
  margin: 0 auto 28px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  min-height: 44px;
}

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

.btn-primary:hover {
  background: var(--blue-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-full {
  width: 100%;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
}

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

.section-dark {
  background: var(--gray-50);
}

.section-accent {
  background: var(--navy);
  color: var(--white);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue);
  padding: 5px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.section-accent .section-tag {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section-accent .section-header h2 {
  color: var(--white);
}

.section-header p {
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  color: var(--gray-500);
  line-height: 1.6;
}

.section-accent .section-header p {
  color: rgba(255, 255, 255, 0.6);
}

/* ===== Services Grid ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--blue);
}

.service-icon {
  width: 48px;
  height: 48px;
  background: var(--blue-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  margin-bottom: 16px;
}

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

.service-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.service-card p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.55;
}

/* ===== Process ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.process-step {
  text-align: center;
  padding: 24px 16px;
  position: relative;
}

.step-number {
  display: inline-block;
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 12px;
}

.process-step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.55;
}

/* ===== Clients ===== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.client-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}

.client-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.client-logo-img {
  width: 72px;
  height: 72px;
  object-fit: contain;
  margin: 0 auto 14px;
  display: block;
}

.client-logo-placeholder {
  width: 64px;
  height: 64px;
  background: var(--gray-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin: 0 auto 14px;
}

.client-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.client-card p {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.5;
}

/* ===== Tech Tags ===== */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.tech-tag {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.85);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}

.tech-tag:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

/* ===== Contact ===== */
.section-contact {
  background: var(--gray-50);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info .section-tag {
  margin-bottom: 14px;
}

.contact-info h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.contact-info > p {
  font-size: 0.95rem;
  color: var(--gray-500);
  margin-bottom: 28px;
  line-height: 1.6;
}

.contact-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-details li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gray-600);
  font-size: 0.9rem;
}

.contact-details svg {
  color: var(--blue);
  flex-shrink: 0;
}

.contact-form-wrapper {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--gray-800);
  background: var(--white);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-400);
}

.status-message {
  margin-top: 14px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 500;
  word-break: break-word;
}

/* ===== Footer ===== */
.footer {
  background: var(--navy);
  color: var(--white);
  padding: 40px 0 20px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
}

.footer-logo {
  height: 26px;
  width: auto;
}

.footer-brand p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 400;
  margin-left: auto;
  margin-top: 30px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

.footer-bottom {
  padding-top: 20px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  animation: fadeInUp 0.8s ease-out;
}

.hero-stats {
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.service-card,
.process-step,
.client-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.service-card.visible,
.process-step.visible,
.client-card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Tablet: 768px ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 20px;
    gap: 0;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    padding: 14px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--gray-100);
    width: 100%;
    text-align: center;
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .nav-cta {
    margin-top: 8px;
  }

  .hero {
    padding: 110px 0 60px;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .section {
    padding: 60px 0;
  }

  .section-header {
    margin-bottom: 36px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .service-card {
    padding: 20px;
  }

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

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

  .contact-form-wrapper {
    padding: 24px;
  }

  .footer-content {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-brand p {
    margin-left: 0;
    margin-top: 8px;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }
}

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

  .nav-container {
    padding: 0 16px;
    height: 60px;
  }

  .logo-img {
    height: 28px;
  }

  .nav-links {
    top: 60px;
  }

  .hero {
    padding: 100px 0 50px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 0.9rem;
    margin-bottom: 24px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .hero-stats {
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }

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

  .stat-number {
    font-size: 1.25rem;
    margin-bottom: 0;
  }

  .stat-label {
    font-size: 0.75rem;
  }

  .hero::after {
    height: 40px;
  }

  .section {
    padding: 48px 0;
  }

  .section-header {
    margin-bottom: 28px;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .service-card {
    padding: 20px;
  }

  .service-icon {
    width: 44px;
    height: 44px;
    margin-bottom: 12px;
  }

  .service-card h3 {
    font-size: 1rem;
  }

  .service-card p {
    font-size: 0.85rem;
  }

  .process-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .process-step {
    padding: 20px 16px;
  }

  .step-number {
    font-size: 2rem;
  }

  .process-step h3 {
    font-size: 1rem;
  }

  .process-step p {
    font-size: 0.85rem;
  }

  .clients-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .client-card {
    padding: 24px 20px;
  }

  .client-logo-img {
    width: 64px;
    height: 64px;
  }

  .tech-tags {
    gap: 8px;
  }

  .tech-tag {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  .contact-layout {
    gap: 24px;
  }

  .contact-info h2 {
    font-size: 1.5rem;
  }

  .contact-info > p {
    font-size: 0.9rem;
    margin-bottom: 20px;
  }

  .contact-form-wrapper {
    padding: 20px;
    border-radius: var(--radius);
  }

  .form-group {
    margin-bottom: 14px;
  }

  .form-group input,
  .form-group textarea {
    padding: 10px 12px;
    font-size: 16px; /* Prevent zoom on iOS */
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .footer {
    padding: 32px 0 16px;
  }

  .footer-brand {
    font-size: 1rem;
  }

  .footer-logo {
    height: 24px;
  }

  .footer-links {
    gap: 12px;
  }

  .footer-links a {
    font-size: 0.8rem;
  }

  .footer-bottom p {
    font-size: 0.75rem;
  }
}