/* Intractech - Design System */
:root {
  --color-dark: #2b2b2b;
  --color-darker: #1a1a1a;
  --color-black: #111111;
  --color-white: #ffffff;
  --color-text-light: #cccccc;
  --color-text-muted: #888888;
  --color-text-dark: #333333;
  --container-max: 1200px;
  --section-padding: 100px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-dark);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

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

/* Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo img {
  width: 70px;
  height: auto;
}

.main-nav ul {
  display: flex;
  gap: 32px;
}

.main-nav a {
  color: var(--color-white);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: opacity 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  opacity: 0.7;
}

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

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
}

/* Hero */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--color-black) url('/images/bg-hero.avif') center center / cover no-repeat;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 140px 24px 100px;
}

.hero h1 {
  color: var(--color-white);
  font-size: clamp(4rem, 10vw, 7rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: 24px;
}

.hero h1 .outline-text {
  -webkit-text-stroke: 2px var(--color-white);
  color: transparent;
}

.hero-tagline {
  color: var(--color-white);
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.4;
  margin-bottom: 16px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  color: rgba(255, 255, 255, 0.85);
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  font-weight: 400;
  letter-spacing: normal;
  text-transform: none;
  line-height: 1.7;
  max-width: 720px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Sections */
.section {
  padding: var(--section-padding) 0;
}

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

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

.section-label {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.section-dark .section-desc {
  color: var(--color-text-light);
  font-size: 17px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.subsection-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 24px;
  color: var(--color-text-light);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-transform: none;
  line-height: 1.25;
  margin-bottom: 20px;
}

.section-header {
  margin-bottom: 48px;
  max-width: 680px;
}

.section-header-center {
  text-align: center;
  max-width: none;
  margin-left: auto;
  margin-right: auto;
}

.section-intro {
  font-size: 17px;
  line-height: 1.7;
  color: #555;
}

.section-dark .section-intro {
  color: var(--color-text-light);
}

.body-text {
  font-size: 16px;
  line-height: 1.8;
  color: #555;
  margin-bottom: 32px;
  max-width: 480px;
}

/* Split Grid */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.split-grid-reverse {
  direction: rtl;
}

.split-grid-reverse > * {
  direction: ltr;
}

.split-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.split-image-flip img {
  transform: scaleX(-1);
}

/* Buttons */
.btn,
button.btn {
  display: inline-block;
  padding: 14px 32px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: opacity 0.2s, background 0.2s;
}

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

.btn-dark:hover {
  background: #333;
}

.btn-light {
  background: var(--color-white);
  color: var(--color-text-dark);
}

.btn-light:hover {
  background: #f0f0f0;
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.6);
}

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

/* Service Cards */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  padding: 32px;
  border: 1px solid #e8e8e8;
  background: var(--color-white);
  transition: border-color 0.2s;
}

.service-card:hover {
  border-color: #ccc;
}

.service-card-featured {
  border-color: #d0d0d0;
  background: #fafafa;
}

.service-card-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-text-dark);
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.3;
}

.service-card h3 a {
  color: inherit;
  transition: opacity 0.2s;
}

.service-card h3 a:hover {
  opacity: 0.7;
}

.service-card p {
  font-size: 15px;
  line-height: 1.65;
  color: #555;
}

/* Why Section */
.why-points p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.why-points p:last-child {
  margin-bottom: 0;
}

/* Automation */
.automation-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 60px;
}

.automation-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.automation-item p {
  font-size: 15px;
  line-height: 1.7;
  color: #555;
}

/* Process Steps */
.process-section {
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.process-section .container {
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 64px;
}

.process-section .cta-content {
  text-align: center;
  padding-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.process-overview {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.process-overview-card {
  padding: 28px 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  flex-direction: column;
}

.process-overview-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.process-overview-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-light);
  margin-bottom: 20px;
  flex-grow: 1;
}

.process-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-white);
  transition: opacity 0.2s;
}

.process-link:hover {
  opacity: 0.7;
}

.process-detail-content .btn {
  margin-top: 24px;
}

.section-dark .section-header-center .section-intro {
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
}

/* How We Work page */
.hero-compact {
  min-height: 55vh;
}

.hero-compact .hero-content {
  padding: 140px 24px 80px;
}

.hero-compact h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

.process-nav {
  background: var(--color-darker);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: sticky;
  top: 0;
  z-index: 50;
}

.process-nav-inner {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 16px 24px;
  overflow-x: auto;
}

.process-nav-link {
  flex-shrink: 0;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-light);
  border: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.process-nav-link:hover,
.process-nav-link.active {
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.2);
}

.service-detail-content {
  padding: 80px 0;
}

.service-detail-inner {
  max-width: 720px;
}

.service-detail-inner h2 {
  margin: 32px 0 16px;
}

.service-detail-note {
  font-size: 15px;
  color: var(--color-text-light);
  margin: 28px 0 24px;
  line-height: 1.7;
}

.service-detail-inner .btn {
  margin-top: 8px;
}

.process-intro {
  padding: 80px 0;
}

.process-intro-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.process-intro-inner h2 {
  margin-bottom: 20px;
}

.process-intro-inner p {
  font-size: 17px;
  line-height: 1.75;
  color: var(--color-text-light);
}

.process-detail {
  scroll-margin-top: 60px;
  padding: 100px 0;
}

.process-detail-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 40px 60px;
  align-items: start;
}

.process-detail-inner:has(.process-detail-image) {
  grid-template-columns: auto 1fr 1fr;
}

.process-detail-number {
  font-size: clamp(4rem, 10vw, 7rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1;
  color: rgba(255, 255, 255, 0.1);
  user-select: none;
}

.process-detail-number-light {
  color: rgba(0, 0, 0, 0.06);
}

.process-detail-content h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.process-detail-text {
  font-size: 17px;
  line-height: 1.75;
  margin-bottom: 28px;
}

.section-light .process-detail-text {
  color: #555;
}

.section-dark .process-detail-text {
  color: var(--color-text-light);
}

.process-detail-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 32px;
}

.process-detail-list li {
  font-size: 15px;
  line-height: 1.6;
  padding-left: 18px;
  position: relative;
}

.process-detail-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  opacity: 0.5;
}

.section-light .process-detail-list li {
  color: #555;
}

.section-dark .process-detail-list li {
  color: var(--color-text-light);
}

.process-detail-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* Contact page */
.contact-page .site-header {
  position: absolute;
}

.contact-hero-banner {
  width: 100%;
  min-height: 40vh;
  overflow: hidden;
  line-height: 0;
}

.contact-hero-banner img {
  width: 100%;
  min-height: 40vh;
  height: 40vh;
  object-fit: cover;
  object-position: center center;
  filter: grayscale(100%);
}

.contact-section {
  padding: 72px 0 100px;
}

.contact-content {
  max-width: 420px;
}

.contact-content h1 {
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 24px;
}

.contact-intro {
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-light);
  margin-bottom: 40px;
}

.contact-alert {
  padding: 14px 18px;
  margin-bottom: 24px;
  font-size: 14px;
  line-height: 1.5;
}

.contact-alert-success {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
}

.contact-alert-error {
  background: rgba(255, 100, 100, 0.1);
  border: 1px solid rgba(255, 100, 100, 0.3);
  color: #ffb3b3;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-group label {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-light);
}

.form-group input {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--color-white);
  padding: 14px 16px;
  font-family: var(--font-family);
  font-size: 15px;
  border-radius: 0;
  width: 100%;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.6);
}

.form-group input::placeholder {
  color: rgba(255, 255, 255, 0.3);
}

.btn-send {
  background: var(--color-white);
  color: var(--color-black);
  padding: 12px 36px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  align-self: flex-start;
  margin-top: 4px;
}

.btn-send:hover {
  background: #e8e8e8;
}

/* Who We Are page */
.hero-title-stacked {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  line-height: 1.05;
}

.hero-title-stacked span {
  display: block;
}

.hero-title-stacked .outline-text {
  -webkit-text-stroke: 1.5px var(--color-white);
  color: transparent;
}

.about-section {
  padding: 100px 0 120px;
}

.about-block {
  max-width: 620px;
  margin-bottom: 72px;
  scroll-margin-top: 60px;
}

.about-block:last-child {
  margin-bottom: 0;
}

.about-block h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 20px;
  color: var(--color-white);
}

.about-block p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-light);
}

@media (max-width: 992px) {
  .process-detail-inner,
  .process-detail-inner:has(.process-detail-image) {
    grid-template-columns: 1fr;
  }

  .process-detail-number {
    margin-bottom: -16px;
  }

  .process-detail-list {
    grid-template-columns: 1fr;
  }

  .process-detail-image img {
    height: 260px;
  }
}

/* CTA */
.cta-section {
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-content h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  margin-bottom: 16px;
}

.cta-content p {
  color: var(--color-text-light);
  font-size: 16px;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
.site-footer {
  background: var(--color-darker);
  color: var(--color-text-light);
  padding: 80px 0 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-about p {
  font-size: 14px;
  line-height: 1.7;
  margin: 20px 0;
  max-width: 340px;
}

.footer-contact p {
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 4px;
}

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

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 13px;
  color: var(--color-text-light);
  transition: color 0.2s;
}

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

/* Placeholder pages */
.page-hero {
  background: var(--color-dark);
  color: var(--color-white);
  padding: 160px 0 80px;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.page-content {
  padding: 80px 0;
}

.page-content p {
  font-size: 17px;
  line-height: 1.8;
  color: #555;
  max-width: 700px;
}

/* Responsive */
@media (max-width: 992px) {
  .split-grid,
  .footer-grid,
  .service-grid,
  .automation-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .split-grid-reverse {
    direction: ltr;
  }

  .split-image img {
    height: 300px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(17, 17, 17, 0.95);
    padding: 20px 24px;
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 16px;
  }

  .hero {
    min-height: 70vh;
  }

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