:root {
  --color-primary: #37a0e6;
  --color-primary-dark: #2a88c8;
  --color-primary-light: #EDF6FC;
  --color-primary-subtle: #F0FAFC;
  --color-text: #1A1A2E;
  --color-text-secondary: #5A6275;
  --color-text-muted: #8E95A5;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAFB;
  --color-border: #E8ECF0;
  --color-white: #FFFFFF;
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.04), 0 10px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 16px rgba(0,0,0,0.04), 0 20px 48px rgba(0,0,0,0.08);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  --font-family: 'Manrope', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-thai: 'Noto Sans Thai', 'Manrope', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-8: 64px;
  --space-10: 80px;
  --space-12: 96px;
  --space-15: 120px;
  --transition: 200ms ease;
}

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

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

body {
  font-family: var(--font-thai);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family);
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-5);
  }
}

.section-spacing {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .section-spacing {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }
}

@media (min-width: 1024px) {
  .section-spacing {
    padding-top: var(--space-15);
    padding-bottom: var(--space-15);
  }
}

/* ========== NAVBAR ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 768px) {
  .nav-inner {
    padding: 0 var(--space-5);
  }
}

.nav-logo img {
  height: 44px;
  width: auto;
}

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

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color var(--transition);
}

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

.nav-cta {
  display: none;
  height: 14px;
  padding: 0 8px;
  font-size: 9px;
  font-weight: 600;
  border-radius: 100px;
}

@media (min-width: 768px) {
  .nav-cta {
    display: inline-flex;
  }
}

.nav-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
  gap: 5px;
}

@media (min-width: 768px) {
  .nav-hamburger {
    display: none;
  }
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  padding: var(--space-4) var(--space-3);
  transform: translateX(100%);
  transition: transform 300ms ease;
  z-index: 999;
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu a {
  display: block;
  padding: var(--space-3) 0;
  color: var(--color-text);
  font-size: 18px;
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu .btn-primary {
  display: inline-block;
  margin-top: var(--space-4);
  border-bottom: none;
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 15px;
  border-radius: 100px;
  padding: 0 24px;
  height: 44px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,164,200,0.3);
}

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

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

.btn-large {
  font-size: 16px;
  height: 50px;
  padding: 0 32px;
  border-radius: 100px;
}

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

.btn-white:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
}

/* ========== HERO ========== */
.hero {
  padding-top: calc(var(--nav-height) + var(--space-8));
  padding-bottom: var(--space-8);
  background: var(--color-bg);
}

@media (min-width: 768px) {
  .hero {
    padding-top: calc(var(--nav-height) + var(--space-12));
    padding-bottom: var(--space-12);
  }
}

@media (min-width: 1024px) {
  .hero {
    padding-top: calc(var(--nav-height) + var(--space-15));
    padding-bottom: var(--space-15);
  }
}

.hero-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: var(--space-8);
    align-items: center;
  }

  .hero-content {
    text-align: left;
    max-width: none;
  }
}

.hero h1 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .hero h1 {
    font-size: 44px;
  }
}

@media (min-width: 1024px) {
  .hero h1 {
    font-size: 52px;
  }
}

.hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 18px;
  }
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .hero-ctas {
    flex-direction: row;
    gap: var(--space-3);
  }
}

@media (min-width: 1024px) {
  .hero-ctas {
    justify-content: flex-start;
  }
}

.hero-trust {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  margin-top: var(--space-4);
}

@media (min-width: 1024px) {
  .hero-trust {
    align-items: flex-start;
  }
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.hero-trust-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.hero-visual {
  margin-top: var(--space-6);
}

@media (min-width: 1024px) {
  .hero-visual {
    margin-top: 0;
  }
}

.hero-dashboard {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.hero-dashboard img {
  display: block;
  width: 100%;
  height: auto;
}

.dashboard-browser-bar {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.dashboard-browser-dot:nth-child(1) { background: #FF5F57; }
.dashboard-browser-dot:nth-child(2) { background: #FFBD2E; }
.dashboard-browser-dot:nth-child(3) { background: #28CA41; }

.dashboard-browser-url {
  flex: 1;
  background: var(--color-white);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-left: 12px;
}

/* ========== TRUST SECTION ========== */
.trust-section {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.trust-label {
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

.trust-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  flex-wrap: wrap;
  opacity: 0.4;
}

.trust-logos img {
  height: 28px;
  width: auto;
  filter: grayscale(100%);
}

/* ========== SECTION COMMON ========== */
.section-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

@media (min-width: 768px) {
  .section-title {
    font-size: 36px;
  }
}

@media (min-width: 1024px) {
  .section-title {
    font-size: 42px;
  }
}

.section-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 560px;
}

.section-subtitle.centered {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

/* ========== FEATURES ========== */
.features {
  background: var(--color-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }
}

.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

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

.feature-icon {
  width: 80px;
  height: 80px;
  min-width: 80px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-icon img {
  width: 64px;
  height: 64px;
}

.feature-card-text {
  flex: 1;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ========== DEMO SHOWCASE ========== */
.demo-section {
  background: var(--color-bg-alt);
}

.demo-preview {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.demo-preview img {
  display: block;
  width: 100%;
  height: auto;
}

.demo-content-wrapper {
  text-align: center;
}

.demo-content-wrapper .section-subtitle {
  margin-bottom: var(--space-5);
}

@media (min-width: 1024px) {
  .demo-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-8);
    align-items: center;
  }

  .demo-content-wrapper {
    text-align: left;
  }
}

/* ========== ONBOARDING ========== */
.onboarding {
  background: var(--color-bg);
}

.onboarding-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  position: relative;
}

@media (min-width: 768px) {
  .onboarding-steps {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }
}

@media (min-width: 1024px) {
  .onboarding-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }
}

.step-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  position: relative;
  transition: all var(--transition);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.step-icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  background: transparent;
}

.step-icon img {
  width: 48px;
  height: 48px;
}

.step-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

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

@media (min-width: 1024px) {
  .step-card::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -28px;
    width: 32px;
    height: 2px;
    background: var(--color-border);
  }

  .step-card:last-child::after {
    display: none;
  }
}

/* ========== FINAL CTA ========== */
.final-cta {
  background: var(--color-primary);
  color: var(--color-white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta .section-title {
  color: var(--color-white);
}

.final-cta .section-subtitle {
  color: rgba(255,255,255,0.85);
  margin-left: auto;
  margin-right: auto;
}

.final-cta .container {
  position: relative;
  z-index: 1;
}

.final-cta-logo {
  width: 80px;
  height: 80px;
  opacity: 0.15;
  position: absolute;
  right: -10px;
  bottom: -10px;
}

@media (min-width: 768px) {
  .final-cta-logo {
    width: 140px;
    height: 140px;
    right: -20px;
    bottom: -20px;
  }
}

/* ========== FOOTER ========== */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.6);
  padding: var(--space-8) 0 var(--space-4);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer ul {
  list-style: none;
}

.footer li {
  margin-bottom: var(--space-2);
}

.footer a {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-4);
  text-align: center;
  font-size: 13px;
}

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

.animate-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

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

/* ========== UTILITY ========== */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-2); }
.mt-8 { margin-top: var(--space-4); }
.mt-12 { margin-top: var(--space-6); }
.mb-0 { margin-bottom: 0; }