/* Variables */
:root {
  --color-bg: #0f1419;
  --color-surface: #1a2332;
  --color-surface-alt: #1e293b;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --font-heading: 'Outfit', system-ui, sans-serif;
  --font-body: 'Outfit', system-ui, sans-serif;
  --max-width: 1100px;
  --header-height: 72px;
  --radius: 8px;
  --transition: 0.2s ease;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; object-fit: cover; }

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(15, 20, 25, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background var(--transition);
}

.header.is-scrolled {
  background: rgba(15, 20, 25, 0.98);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.logo-accent {
  color: var(--color-primary);
  font-weight: 600;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
}

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

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: calc(var(--header-height) + 48px) 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('images/hero_1.png') center/cover no-repeat;
  pointer-events: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(15, 20, 25, 0.78) 0%, rgba(15, 20, 25, 0.92) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

/* Hero reveal */
.hero-reveal-item {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}
.hero.loaded .hero-reveal-item {
  opacity: 1;
  transform: translateY(0);
}
.hero.loaded .hero-label { transition-delay: 0.1s; }
.hero.loaded .hero-title { transition-delay: 0.2s; }
.hero.loaded .hero-desc { transition-delay: 0.35s; }
.hero.loaded .hero-content .btn { transition-delay: 0.5s; }

.hero-label {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.hero-desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

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

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

/* Scroll-in animation */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}
.section.in-view .animate-on-scroll {
  opacity: 1;
  transform: translateY(0);
}
/* Stagger: About */
.about.in-view .section-label { transition-delay: 0s; }
.about.in-view .section-title { transition-delay: 0.08s; }
.about.in-view .about-image { transition-delay: 0.15s; }
.about.in-view .about-text { transition-delay: 0.25s; }
/* Stagger: Business */
.business.in-view .section-label { transition-delay: 0s; }
.business.in-view .section-title { transition-delay: 0.08s; }
.business.in-view .section-desc { transition-delay: 0.15s; }
.business.in-view .cards .card:nth-child(1) { transition-delay: 0.18s; }
.business.in-view .cards .card:nth-child(2) { transition-delay: 0.28s; }
.business.in-view .cards .card:nth-child(3) { transition-delay: 0.38s; }
.business.in-view .cards .card:nth-child(4) { transition-delay: 0.48s; }
/* Industries, Process */
.industries.in-view .section-label { transition-delay: 0s; }
.industries.in-view .section-title { transition-delay: 0.06s; }
.industries.in-view .industry-list { transition-delay: 0.12s; }
.process.in-view .section-label { transition-delay: 0s; }
.process.in-view .section-title { transition-delay: 0.06s; }
.process.in-view .process-flow { transition-delay: 0.1s; }
/* Stagger: Strengths */
.strengths.in-view .section-label { transition-delay: 0s; }
.strengths.in-view .section-title { transition-delay: 0.08s; }
.strengths.in-view .strength-grid .strength-item:nth-child(1) { transition-delay: 0.12s; }
.strengths.in-view .strength-grid .strength-item:nth-child(2) { transition-delay: 0.22s; }
.strengths.in-view .strength-grid .strength-item:nth-child(3) { transition-delay: 0.32s; }
/* CTA, Contact */
.cta-banner.in-view .cta-content { transition-delay: 0.1s; }
.contact.in-view .section-label { transition-delay: 0s; }
.contact.in-view .section-title { transition-delay: 0.08s; }
.contact.in-view .contact-info { transition-delay: 0.15s; }
.contact.in-view .contact-form { transition-delay: 0.25s; }

/* Section */
.section {
  padding: 100px 0;
}

.section-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  margin: 0 0 48px;
  color: var(--color-text-muted);
  max-width: 560px;
}

/* About */
.about { background: var(--color-surface); }

.about-grid {
  display: grid;
  gap: 48px;
  align-items: center;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.about-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.about-image img {
  width: 100%;
  aspect-ratio: 4/3;
}

.about-lead {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-text);
  margin: 0 0 16px;
}

.about-text p {
  margin: 0 0 12px;
  color: var(--color-text-muted);
}

.about-text p:last-of-type {
  margin-bottom: 0;
}

.about-flow {
  margin: 20px 0 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

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

/* Business */
.business { background: var(--color-bg); }

.cards {
  display: grid;
  gap: 32px;
}

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

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

@media (min-width: 640px) {
  .cards--four {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .cards--four {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: rgba(59, 130, 246, 0.2);
}

.card-image {
  aspect-ratio: 3/2;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  transition: transform 0.4s ease;
}

.card:hover .card-image img {
  transform: scale(1.02);
}

.card-body {
  padding: 24px;
}

.card-body h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--color-text);
}

.card-body p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.card-body ul {
  margin: 0 0 0 1.15rem;
  padding: 0;
  list-style: disc;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.card-body li {
  margin-bottom: 0.35em;
}

.card-body li:last-child {
  margin-bottom: 0;
}

/* Industries */
.industries {
  background: var(--color-surface);
}

.industry-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  max-width: 720px;
}

.industry-list li {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0;
  position: relative;
  padding-left: 0;
}

.industry-list li::before {
  content: "—";
  margin-right: 12px;
  color: var(--color-primary);
  font-weight: 400;
}

/* Trade Process */
.process {
  background: var(--color-bg);
}

.process-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .process-flow {
    grid-template-columns: 1fr 28px 1fr 28px 1fr 28px 1fr;
    gap: 0 8px;
    align-items: stretch;
  }
}

.process-step {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
  padding: 24px 22px 24px 26px;
  background: var(--color-surface);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  min-width: 0;
}

.process-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-primary);
  border-radius: 10px 0 0 10px;
}

@media (min-width: 768px) {
  .process-step {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    padding: 28px 22px 26px 28px;
    min-height: 200px;
  }

  .process-step::before {
    width: 4px;
    height: 100%;
    top: 0;
    bottom: 0;
  }
}

.process-num-wrap {
  grid-row: 1;
  grid-column: 1;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.4);
}

@media (min-width: 768px) {
  .process-num-wrap {
    width: 52px;
    height: 52px;
    margin-bottom: 4px;
  }
}

.process-num {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.process-step-body {
  grid-row: 1;
  grid-column: 2;
  min-width: 0;
}

@media (min-width: 768px) {
  .process-step-body {
    grid-row: 2;
    grid-column: 1;
  }
}

.process-step h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--color-text);
  line-height: 1.3;
}

.process-step p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.process-connector {
  display: none;
  width: 24px;
  flex-shrink: 0;
  align-self: center;
}

@media (min-width: 768px) {
  .process-connector {
    display: block;
    align-self: center;
    height: 3px;
    width: 100%;
    max-width: 28px;
    background: linear-gradient(to right, var(--color-primary), rgba(59, 130, 246, 0.35));
    border-radius: 2px;
    z-index: 1;
  }
}

/* Strengths */
.strengths { background: var(--color-surface); }

.strength-grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 640px) {
  .strength-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.strength-grid--five {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .strength-grid--five {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .strength-grid--five {
    grid-template-columns: repeat(5, 1fr);
  }
}

.strengths.in-view .strength-grid--five .strength-item:nth-child(4) { transition-delay: 0.42s; }
.strengths.in-view .strength-grid--five .strength-item:nth-child(5) { transition-delay: 0.52s; }

.strength-item {
  padding: 28px 24px;
  background: var(--color-surface-alt);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: border-color var(--transition);
}

.strength-item:hover {
  border-color: rgba(59, 130, 246, 0.2);
}

.strength-icon {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.9;
  margin-bottom: 12px;
}

.strength-item h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--color-text);
}

.strength-item p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(6, 182, 212, 0.1) 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.cta-content {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  margin: 0 0 12px;
}

.cta-content p {
  margin: 0 0 20px;
  color: var(--color-text-muted);
}

/* CTA highlights */
.cta-banner .cta-highlights {
  display: grid !important;
  grid-template-columns: repeat(4, 1fr) !important;
  gap: 12px !important;
  margin: 0 auto 32px !important;
  max-width: 100% !important;
  padding: 0 !important;
  list-style: none !important;
}

.cta-banner .cta-highlight-item {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  min-height: 72px !important;
  padding: 14px 12px !important;
  font-size: 0.85rem !important;
  font-weight: 600 !important;
  line-height: 1.35 !important;
  text-align: center !important;
  color: #e2e8f0 !important;
  background: rgba(30, 41, 59, 0.9) !important;
  border-left: 4px solid #3b82f6 !important;
  border-radius: 8px !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25) !important;
}

.cta-banner .cta-highlight-item::before {
  content: "" !important;
  display: none !important;
}

@media (max-width: 900px) {
  .cta-banner .cta-highlights {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

@media (max-width: 480px) {
  .cta-banner .cta-highlights {
    grid-template-columns: 1fr !important;
  }
}

/* Contact */
.contact { background: var(--color-bg); }

.contact-grid {
  display: grid;
  gap: 48px;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-info .company-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  margin: 0 0 20px;
}

.contact-info p {
  margin: 0 0 20px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.contact-info strong {
  display: block;
  color: var(--color-text);
  margin-bottom: 4px;
  font-size: 0.9rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.8;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

.contact-form .btn {
  align-self: flex-start;
}

/* Footer */
.footer {
  padding: 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: var(--color-surface);
}

.footer .container {
  text-align: center;
}

.footer-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  margin: 0 0 8px;
  color: var(--color-text);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0 0 16px;
}

.footer-copy {
  margin: 0 0 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  opacity: 0.8;
}

.footer-credit {
  margin: 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  opacity: 0.7;
}

.footer-credit a {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-credit a:hover {
  opacity: 0.9;
}

/* Mobile */
@media (max-width: 767px) {
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 64px 0;
  }

  .logo {
    font-size: 1rem;
  }
}