/* ============================================
   NEXTECH UI LTD — Light/Bright Theme
   ============================================ */

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

:root {
  --bg-primary:    #FFFFFF;
  --bg-secondary:  #F8F9FA;
  --bg-card:       #F8F9FA;
  --bg-hover:      #F3F4F6;
  --border:        #E5E7EB;
  --border-hover:  #D1D5DB;
  --text-primary:  #111827;
  --text-secondary:#6B7280;
  --text-tertiary: #9CA3AF;
  --accent:        #3B82F6;
  --accent-light:  #DBEAFE;
  --accent-glow:   rgba(59, 130, 246, 0.08);
  --green:         #22C55E;
  --blue:          #3B82F6;
  --amber:         #F59E0B;
  --white:         #FFFFFF;
  --radius:        8px;
  --radius-lg:     16px;
  --max-width:     1200px;
  --transition:    0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--accent);
  color: var(--white);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

/* --- Navigation --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  transition: var(--transition);
}

nav.scrolled {
  background: rgba(11, 11, 15, 0.82);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.nav-links { display: flex; gap: 2rem; align-items: center; }

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.nav-cta {
  background: var(--accent);
  color: var(--white) !important;
  padding: 0.45rem 1rem;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
}

.nav-cta:hover {
  background: var(--accent) !important;
  color: #fff !important;
}

/* Mobile nav */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

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

.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(59,130,246,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(124,92,252,0.1);
  color: var(--accent-light);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(124,92,252,0.15);
}

.hero h1 {
  font-size: clamp(2.8rem, 8vw, 5rem);
  margin-bottom: 0.3rem;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero h1 .accent { color: var(--accent-light); }

.hero .sub-title {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  margin-top: 1.5rem;
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-buttons { display: flex; gap: 0.8rem; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  border-color: var(--text-secondary);
  transform: translateY(-1px);
}

/* --- Section common --- */
section { padding: 6rem 2rem; }

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  margin-bottom: 3.5rem;
  max-width: 640px;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}

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

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-hover);
  transform: translateY(-2px);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 44px;
  height: 44px;
  background: rgba(124,92,252,0.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.2rem;
  font-size: 1.2rem;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.2rem;
}

.tag {
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  background: rgba(124,92,252,0.08);
  color: var(--accent-light);
  border-radius: 100px;
  font-weight: 500;
}

/* --- Terminal Section --- */
.terminal-section {
  background: var(--bg-secondary);
}

.terminal-window {
  background: #F0F4FF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 800px;
  margin: 0 auto;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  background: #E8EEFF;
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.red { background: #FF5F57; }
.terminal-dot.yellow { background: #FFBD2E; }
.terminal-dot.green { background: #28C840; }

.terminal-title {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-left: 0.5rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.terminal-body {
  padding: 1.5rem;
  font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  line-height: 1.8;
  color: #4B5563;
  overflow-x: auto;
}

.terminal-body .prompt { color: var(--green); }
.terminal-body .cmd { color: #1F2937; }
.terminal-body .output { color: #4B5563; }
.terminal-body .highlight { color: var(--accent); }
.terminal-body .comment { color: #9CA3AF; font-style: italic; }

/* --- Workflow Visual --- */
.workflow-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  padding: 2rem 0;
}

.workflow-node {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1.2rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition);
}

.workflow-node:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.workflow-node .node-icon { font-size: 1rem; }

.workflow-arrow {
  color: var(--text-tertiary);
  font-size: 1.2rem;
}

/* --- Pricing --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: 960px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  transition: all var(--transition);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(124,92,252,0.05), transparent);
}

.pricing-card.featured::before {
  content: 'Most Popular';
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.8rem;
  border-radius: 100px;
  white-space: nowrap;
}

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

.pricing-card.featured:hover {
  border-color: var(--accent-light);
}

.pricing-name {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.pricing-price {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.pricing-price .currency {
  font-size: 1.4rem;
  font-weight: 600;
  vertical-align: super;
}

.pricing-period {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: 1.5rem;
}

.pricing-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  min-height: 2.5rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0.4rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pricing-features li::before {
  content: '✓';
  color: var(--green);
  font-weight: 700;
}

.pricing-card .btn {
  width: 100%;
  justify-content: center;
  padding: 0.7rem;
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: 8rem 2rem;
  position: relative;
  background: var(--bg-secondary);
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
  pointer-events: none;
}

.cta-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.cta-section p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 2rem;
  font-size: 1rem;
  position: relative;
  z-index: 1;
}

.cta-section .btn {
  position: relative;
  z-index: 1;
}

/* --- Page Header (inner pages) --- */
.page-header {
  padding: 10rem 2rem 4rem;
  background: var(--bg-secondary);
}

.page-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 0.8rem;
}

.page-header p {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info .intro {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contact-details { display: flex; flex-direction: column; gap: 1.5rem; }

.contact-detail-item { display: flex; flex-direction: column; gap: 0.2rem; }

.contact-detail-item .label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
}

.contact-detail-item .value {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
}

.company-details {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.company-details p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Contact form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.form-group { margin-bottom: 1.5rem; }

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--bg-primary);
  transition: border-color var(--transition);
  outline: none;
  color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124,92,252,0.15);
}

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

.form-group select {
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235E5E72' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-group select option {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.btn-submit {
  width: 100%;
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.85rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.btn-submit:hover {
  background: var(--accent);
  color: #fff;
}

/* --- Legal Pages (Terms / Refund) --- */
.legal-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}

.legal-content h2 {
  font-size: 1.4rem;
  margin: 2.5rem 0 0.8rem;
}

.legal-content h3 {
  font-size: 1.1rem;
  margin: 2rem 0 0.5rem;
}

.legal-content p,
.legal-content li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0.6rem;
}

.legal-content ul {
  padding-left: 1.5rem;
  list-style: disc;
}

.legal-content strong {
  color: var(--text-primary);
}

/* --- Footer --- */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-left { display: flex; flex-direction: column; gap: 0.3rem; }

.footer-left .company-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.footer-left .details {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}



.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition);
}

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

.footer-right {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* --- 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);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  nav { padding: 0.8rem 1.2rem; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 300px;
    height: 100vh;
    background: var(--bg-primary);
    border-left: 1px solid var(--border);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 1.5rem;
    transition: right 0.4s ease;
    z-index: 99;
  }

  .nav-links.open { right: 0; }

  .nav-links a { font-size: 1rem; }

  .nav-toggle { display: flex; }

  .hero { padding: 6rem 1.2rem 4rem; }
  .hero::before { width: 300px; height: 300px; }
  .hero::after { display: none; }

  section { padding: 4rem 1.2rem; }

  .features-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links { justify-content: center; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}