:root {
  --color-primary: #0a5c45;
  --color-primary-deep: #0b523d;
  --color-lime: #d9ffaa;
  --color-periwinkle: #c1d3ff;
  --color-body: #565758;
  --color-heading: #050709;
  --color-white: #ffffff;
  --color-surface: #ffffff;
  --color-navbar: rgba(255, 255, 255, 0.9);
  --color-line: #e2e2e2;
  --radius-pill: 50px;
  --radius-lg: 24px;
  --font-body: "DM Mono", ui-monospace, monospace;
  --font-heading: "Nanum Myeongjo", Georgia, serif;
  --container: 1200px;
  --shadow: 0 24px 60px rgba(5, 7, 9, 0.08);
}

[data-theme="dark"] {
  --color-body: #b6bbc0;
  --color-heading: #f2f5f7;
  --color-surface: #161c22;
  --color-navbar: rgba(18, 23, 28, 0.9);
  --color-line: #2b333b;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

[data-theme="dark"] .services,
[data-theme="dark"] .cta {
  background: #1c2437;
}

[data-theme="dark"] .service-item {
  border-top-color: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .service-item:last-child {
  border-bottom-color: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .process-number,
[data-theme="dark"] .subscribe-button,
[data-theme="dark"] .footer-social-link:hover {
  color: #050709;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-body);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

h1, h2, h3, h4 {
  margin: 0;
  color: var(--color-heading);
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.15;
}

p {
  margin: 0;
}

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

.section {
  padding: 90px 0;
}

.section-tight {
  padding: 40px 0;
}

.pre-title {
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 400;
  margin-bottom: 10px;
}

.pre-title.center {
  text-align: center;
}

.section-title {
  font-size: clamp(1.9rem, 3.4vw, 2.9rem);
  margin-bottom: 16px;
}

.section-description {
  max-width: 46ch;
  margin-bottom: 28px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 48px;
}

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

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

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Buttons */
.button-primary,
.button-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 30px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-primary);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

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

.button-primary:hover {
  background: var(--color-primary-deep);
  transform: translateY(-2px);
}

.button-outline {
  background: transparent;
  color: var(--color-primary);
}

.button-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-navbar);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-heading);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.nav-menu {
  display: flex;
  gap: 30px;
}

.nav-link {
  color: var(--color-body);
  font-size: 15px;
  transition: color 0.2s ease;
}

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  color: var(--color-heading);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.theme-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.theme-icon {
  display: none;
}

[data-theme="light"] .theme-icon-moon,
[data-theme="dark"] .theme-icon-sun,
html:not([data-theme]) .theme-icon-moon {
  display: block;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-heading);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  margin: 12px 0 20px;
}

.hero-description {
  max-width: 52ch;
  margin-bottom: 36px;
}

.hero-image-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Clients */
.clients-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-top: 24px;
}

.client-logo {
  height: 34px;
  width: auto;
  opacity: 0.55;
  filter: grayscale(1);
  transition: opacity 0.2s ease;
}

.client-logo:hover {
  opacity: 1;
}

/* About */
.about-wrap {
  max-width: 960px;
}

.about-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.35;
  margin: 20px 0 36px;
}

/* Services */
.services {
  background: var(--color-periwinkle);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 56px;
  align-items: start;
}

.services-intro {
  position: sticky;
  top: 100px;
}

.service-item {
  border-top: 1px solid rgba(5, 7, 9, 0.15);
}

.service-item:last-child {
  border-bottom: 1px solid rgba(5, 7, 9, 0.15);
}

.service-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 24px 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
}

.service-title {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  color: var(--color-heading);
}

.service-icon {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
}

.service-icon::before,
.service-icon::after {
  content: "";
  position: absolute;
  background: var(--color-primary);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.service-icon::before {
  top: 10px;
  left: 0;
  width: 22px;
  height: 2px;
}

.service-icon::after {
  top: 0;
  left: 10px;
  width: 2px;
  height: 22px;
}

.service-item.open .service-icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.service-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.service-item.open .service-body {
  max-height: 240px;
}

.service-body p {
  padding-bottom: 24px;
  max-width: 60ch;
}

/* Benefits */
.benefits-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
}

.benefits-image-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.benefits-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.benefits-slider {
  margin-top: 24px;
}

.benefit-slides {
  position: relative;
}

.benefit-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease;
}

.benefit-slide.active {
  position: relative;
  opacity: 1;
  visibility: visible;
}

.benefit-slide-image {
  width: 74px;
  height: 74px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 18px;
}

.benefit-slide-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.benefit-title {
  font-size: 1.5rem;
  margin-bottom: 14px;
}

.benefit-divider {
  width: 60px;
  height: 2px;
  background: var(--color-primary);
  margin-bottom: 16px;
}

.benefit-description {
  max-width: 52ch;
}

.slider-controls {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.slider-arrow {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid var(--color-primary);
  background: transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}

.slider-arrow:hover {
  background: var(--color-lime);
}

.slider-arrow img {
  width: 20px;
  height: 20px;
}

/* Testimonials */
.sample-note {
  margin-top: 12px;
  font-size: 13px;
  opacity: 0.6;
}

.testimonial-marquee {
  overflow: hidden;
  padding: 8px 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}

.testimonial-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee 60s linear infinite;
}

.testimonial-marquee:hover .testimonial-track {
  animation-play-state: paused;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.testimonial-card {
  flex: 0 0 380px;
  width: 380px;
  margin: 0;
  padding: 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.testimonial-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 18px;
}

.testimonial-quote {
  margin: 0 0 18px;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--color-heading);
}

.testimonial-meta {
  display: flex;
  flex-direction: column;
}

.testimonial-name {
  color: var(--color-primary);
  font-weight: 500;
}

.testimonial-role {
  font-size: 13px;
  opacity: 0.7;
}

/* Process */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.process-item {
  padding: 36px 28px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  text-align: center;
  background: var(--color-surface);
}

.process-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: 20px;
  border-radius: 50%;
  background: var(--color-lime);
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-heading);
}

.process-step-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

/* Events */
.events-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 40px;
  align-items: center;
}

.event-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.event-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.event-image-wrap {
  border-radius: 16px;
  overflow: hidden;
}

.event-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.event-title {
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.event-detail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.event-btn {
  margin-top: 8px;
}

/* Counter */
.counter-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.counter-item {
  text-align: center;
  padding: 20px;
}

.counter-number {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 5vw, 3.6rem);
  color: var(--color-primary);
  margin-bottom: 10px;
}

.counter-title {
  max-width: 30ch;
  margin: 0 auto;
}

/* CTA */
.cta {
  background: var(--color-periwinkle);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr 1fr;
  gap: 32px;
  align-items: center;
}

.cta-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.cta-image-wrap {
  border-radius: 16px;
  overflow: hidden;
}

.cta-image-wrap img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.cta-content {
  text-align: center;
}

.cta-title {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  margin-bottom: 24px;
}

/* Footer */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding: 80px 0 40px;
}

.footer h2,
.footer h3 {
  color: var(--color-white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 48px;
}

.footer-image-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.footer-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-title,
.subscribe-title {
  font-size: 1.4rem;
  margin-bottom: 18px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link-item {
  color: rgba(255, 255, 255, 0.85);
  transition: color 0.2s ease;
}

.footer-link-item:hover {
  color: var(--color-lime);
}

.subscribe-form {
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  padding-bottom: 8px;
  max-width: 340px;
}

.subscribe-input {
  flex: 1;
  background: transparent;
  border: 0;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 15px;
}

.subscribe-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.subscribe-input:focus {
  outline: none;
}

.subscribe-button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 0;
  background: var(--color-lime);
  color: var(--color-heading);
  font-size: 18px;
  cursor: pointer;
}

.footer-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding: 28px 0;
}

.footer-link {
  color: rgba(255, 255, 255, 0.85);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--color-lime);
}

.footer-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 24px;
}

.footer-social {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-social-title {
  opacity: 0.7;
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.35);
  text-transform: uppercase;
  font-size: 13px;
  transition: background 0.2s ease, color 0.2s ease;
}

.footer-social-link:hover {
  background: var(--color-lime);
  color: var(--color-heading);
}

/* Responsive */
@media (max-width: 991px) {
  .section {
    padding: 70px 0;
  }

  .hero-grid,
  .services-grid,
  .benefits-grid,
  .events-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .services-intro {
    position: static;
  }

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

  .cta-images {
    grid-template-columns: 1fr 1fr;
  }

  .footer-image-wrap {
    max-height: 260px;
  }
}

@media (max-width: 767px) {
  .nav-menu {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-menu.open {
    max-height: 320px;
  }

  .nav-menu .nav-link {
    padding: 16px 24px;
    border-top: 1px solid var(--color-line);
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .process-grid,
  .counter-grid {
    grid-template-columns: 1fr;
  }

  .event-card {
    grid-template-columns: 1fr;
  }

  .footer-top,
  .footer-bottom {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 479px) {
  .section {
    padding: 56px 0;
  }

  .container {
    padding: 0 18px;
  }

  .cta-images {
    grid-template-columns: 1fr;
  }

  .testimonial-card {
    flex-basis: 300px;
    width: 300px;
    padding: 24px;
  }

  .button-primary,
  .button-outline {
    width: 100%;
  }
}