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

/* ---------- CSS Variables ---------- */
:root {
  --bg-primary: #09090b;
  --bg-secondary: #0f0f12;
  --bg-card: #13131a;
  --bg-card-hover: #1a1a24;
  --bg-input: #16161f;
  --border-color: #1e1e2a;
  --border-hover: #2a2a3a;

  --text-primary: #f4f4f5;
  --text-secondary: #94949e;
  --text-muted: #52525b;

  /* Clean corporate blue accent */
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.12);
  --accent-glow-strong: rgba(59, 130, 246, 0.25);

  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-accent: 0 4px 20px rgba(59, 130, 246, 0.2);

  --transition-fast: 0.2s ease;
  --transition-mid: 0.35s ease;
  --transition-slow: 0.5s ease;

  --nav-height: 72px;
  --max-width: 1140px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul { list-style: none; }

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.025em;
}

h1 { font-size: clamp(2.5rem, 5.5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.35rem); }

p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

.text-accent { color: var(--accent); }
.text-gradient {
  background: linear-gradient(135deg, var(--accent-light), var(--accent), #1d4ed8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

section {
  padding: 100px 0;
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-mid);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-logo img {
  height: 28px;
  width: auto;
  max-width: 140px;
  filter: invert(1) brightness(2);
  object-fit: contain;
}

.nav-logo .logo-accent {
  color: var(--accent);
}

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

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-mid);
  border-radius: 2px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

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

.nav-cta {
  padding: 8px 20px !important;
  background: var(--accent) !important;
  color: var(--bg-primary) !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  background: var(--accent-hover) !important;
  box-shadow: var(--shadow-accent) !important;
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translateY(7px);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-7px);
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-glow);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 28px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero h1 {
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 36px;
  max-width: 520px;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}

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

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 32px;
  font-size: 0.95rem;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all var(--transition-mid);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.3rem;
}

.card h3 {
  margin-bottom: 10px;
}

.card p {
  font-size: 0.9rem;
}

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

/* ---------- Section Headers ---------- */
.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 56px;
}

.section-header .section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
}

.section-header h2 {
  margin-bottom: 14px;
}

.section-header p {
  font-size: 1rem;
}

/* ---------- Process Steps ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  counter-reset: step-counter;
}

.process-step {
  position: relative;
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  counter-increment: step-counter;
  transition: all var(--transition-mid);
}

.process-step:hover {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.process-step::before {
  content: counter(step-counter, decimal-leading-zero);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-glow-strong);
  line-height: 1;
  margin-bottom: 16px;
  display: block;
}

.process-step h3 {
  margin-bottom: 10px;
}

/* ---------- Forms ---------- */
.form-section {
  max-width: 700px;
  margin: 0 auto;
}

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

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.92rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394949e' viewBox='0 0 16 16'%3E%3Cpath d='M1.5 5.5l6.5 6.5 6.5-6.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

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

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 8px;
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.checkbox-group label {
  text-transform: none !important;
  letter-spacing: 0 !important;
  font-size: 0.88rem !important;
  font-weight: 400 !important;
  cursor: pointer;
}

.form-submit {
  margin-top: 32px;
}

.form-submit .btn {
  width: 100%;
  padding: 16px;
}

.form-message {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--success);
}

.form-message.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--error);
}

/* ---------- Page Header ---------- */
.page-header {
  padding: 140px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.6;
}

.page-header .section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
}

.page-header h1 {
  position: relative;
  margin-bottom: 16px;
}

.page-header p {
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto;
  position: relative;
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  text-align: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.04) 0%, transparent 50%, rgba(59, 130, 246, 0.02) 100%);
  pointer-events: none;
}

.cta-banner .container {
  position: relative;
}

.cta-banner h2 {
  margin-bottom: 14px;
}

.cta-banner p {
  font-size: 1.05rem;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  background: var(--bg-secondary);
}

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

.footer-about {
  max-width: 280px;
}

.footer-about .nav-logo {
  margin-bottom: 14px;
}

.footer-about p {
  font-size: 0.86rem;
}

.footer-col h4 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.footer-col a {
  display: block;
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Contact Info ---------- */
.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}

.contact-card {
  text-align: center;
  padding: 36px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-mid);
}

.contact-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.contact-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.2rem;
}

.contact-card h3 {
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 0.88rem;
}

.contact-card a {
  color: var(--accent);
}

.contact-card a:hover {
  text-decoration: underline;
}

/* ---------- Benefits List ---------- */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.benefit-item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-mid);
}

.benefit-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.benefit-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.benefit-text h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.benefit-text p {
  font-size: 0.86rem;
}

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

.about-text h2 {
  margin-bottom: 20px;
}

.about-text p {
  margin-bottom: 14px;
}

.about-visual {
  position: relative;
}

.about-visual-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 48px;
  position: relative;
  overflow: hidden;
}

.about-visual-card::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -40%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  border-radius: 50%;
}

.about-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  position: relative;
}

.about-value {
  text-align: center;
  padding: 20px;
}

.about-value-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.about-value h4 {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.about-value p {
  font-size: 0.78rem;
}

/* Model Cards */
.model-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.model-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: all var(--transition-mid);
}

.model-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-4px);
}

.model-card.featured {
  border-color: var(--accent);
  position: relative;
  overflow: hidden;
}

.model-card.featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
}

.model-card-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.model-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.model-card .price {
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.model-card ul {
  text-align: left;
}

.model-card ul li {
  font-size: 0.86rem;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.model-card ul li:last-child {
  border-bottom: none;
}

.model-card ul li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  font-size: 0.78rem;
}

/* ---------- Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

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

  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .model-cards {
    grid-template-columns: 1fr;
    max-width: 380px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .nav-logo img {
    height: 20px;
    max-width: 100px;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    height: calc(var(--vh, 1vh) * 100);
    min-height: -webkit-fill-available;
    z-index: 9999;
    background: #09090b;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    padding: 80px 24px 40px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: 1.15rem;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 130px 0 70px;
  }

  .hero-buttons {
    flex-direction: column;
  }

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

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-info-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  section {
    padding: 60px 0;
  }

  .page-header {
    padding: 120px 0 40px;
  }
}

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

  .card {
    padding: 24px;
  }
}

/* ---------- Loader / Spinner ---------- */
.btn.loading {
  pointer-events: none;
  opacity: 0.8;
}

.btn.loading::after {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: 8px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Divider ---------- */
.divider {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 3px;
  margin: 20px auto;
}