/* ==========================================================================
   SM57 – Light, clean, editorial
   Mobile-first, responsive
   ========================================================================== */

:root {
  --color-bg: #fafafa;
  --color-bg-alt: #f1f5f9;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-accent: #0d9488;
  --color-accent-hover: #0f766e;
  --color-accent-soft: rgba(13, 148, 136, 0.08);
  --color-border: #e2e8f0;
  --font-sans: 'Plus Jakarta Sans', system-ui, sans-serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 5rem;
  --space-5xl: 6rem;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --header-h: 72px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--color-accent-hover);
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.site-header.is-scrolled {
  box-shadow: var(--shadow);
}

.header-inner {
  position: relative;
  z-index: 1001;
  max-width: 1140px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: var(--space-lg);
}

.logo {
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.logo:hover {
  color: var(--color-text);
}
.logo-accent {
  color: var(--color-accent);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--color-bg-alt);
  border: none;
  cursor: pointer;
  color: var(--color-text);
  border-radius: var(--radius);
  transition: background var(--transition);
}
.nav-toggle:hover {
  background: var(--color-border);
}
.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}
.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);
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  padding-top: var(--header-h);
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
  padding-bottom: var(--space-xl);
  background: var(--color-surface);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  z-index: 999;
}
.nav::-webkit-scrollbar {
  display: none;
}
.nav.is-open {
  transform: translateX(0);
}

.nav-close {
  display: block;
  position: absolute;
  top: var(--space-md);
  right: var(--space-lg);
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-size: 1.5rem;
  line-height: 1;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition);
}
.nav-close:hover {
  background: var(--color-border);
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  padding-top: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: 0;
  font-size: 1.0625rem;
}
.nav-list li {
  border-bottom: 1px solid var(--color-border);
}
.nav-list li:last-child {
  border-bottom: none;
  margin-top: var(--space-md);
}
.nav-link {
  display: block;
  color: var(--color-text);
  font-weight: 500;
  padding: var(--space-md) 0;
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}
.nav-cta {
  display: block;
  text-align: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent);
  color: #fff !important;
  border-radius: var(--radius);
  margin-top: 0;
}
.nav-cta:hover {
  background: var(--color-accent-hover);
  color: #fff !important;
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + var(--space-3xl)) var(--space-lg) var(--space-3xl);
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: #0f172a url('../images/slide-home.jpg') center/cover no-repeat;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.75) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: var(--space-xs) var(--space-md);
  border-radius: 999px;
  margin-bottom: var(--space-lg);
}

.hero-title {
  margin: 0 0 var(--space-lg);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #fff;
}

.hero-desc {
  margin: 0 0 var(--space-2xl);
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition), border-color var(--transition);
}
.btn:hover {
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}
.btn-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}
.btn-secondary:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   Sections common
   ========================================================================== */

.section {
  padding: var(--space-5xl) var(--space-lg);
  max-width: 1140px;
  margin: 0 auto;
}

.section-head {
  text-align: center;
  max-width: 560px;
  margin: 0 auto var(--space-3xl);
}

.section-label {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.section-title {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.section-desc {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  line-height: 1.7;
}

/* Home: all section intro paragraphs (section-head) same width as content */
.page-home .section-head {
  max-width: 1140px;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-cta {
  text-align: center;
  margin: var(--space-2xl) 0 0;
}

.section-cta .btn {
  margin: 0;
}

.section-cta .btn-secondary {
  color: var(--color-text);
  border-color: var(--color-border);
}
.section-cta .btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

/* ==========================================================================
   Home: value grid (Why Choose Us)
   ========================================================================== */

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

.value-item {
  padding: var(--space-xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.value-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: var(--radius);
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.value-item h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
}

.value-item p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* ==========================================================================
   Home: process (How We Work)
   ========================================================================== */

.process-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 640px;
  margin: 0 auto;
}

.process-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-lg);
  align-items: start;
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.process-item:last-child {
  border-bottom: none;
}

.process-num {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  font-size: 1.125rem;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.process-content h3 {
  margin: 0 0 var(--space-xs);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
}

.process-content p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.about-stats-center {
  text-align: center;
}

.about-stats-center .stat-item {
  text-align: center;
}

/* ==========================================================================
   Page header (inner pages)
   ========================================================================== */

.page-header {
  padding: calc(var(--header-h) + var(--space-4xl)) var(--space-lg) var(--space-4xl);
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.page-header-inner {
  max-width: 1140px;
  margin: 0 auto;
  text-align: center;
}

.page-title {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.page-desc {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   Services
   ========================================================================== */

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

.service-card {
  padding: var(--space-2xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.service-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: var(--radius);
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
}

.service-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

.service-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.service-card-link {
  text-decoration: none;
  color: inherit;
}
.service-card-link:hover {
  color: inherit;
}
.service-card-link .service-card-arrow {
  display: inline-block;
  margin-top: var(--space-md);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-accent);
}
.service-card-link:hover .service-card-arrow {
  color: var(--color-accent-hover);
}

/* ==========================================================================
   About
   ========================================================================== */

.section.about-section {
  background: var(--color-bg-alt);
}

.about-inner {
  display: grid;
  gap: var(--space-3xl);
  grid-template-columns: 1fr;
  align-items: center;
}

.about-content p {
  margin: 0 0 var(--space-lg);
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  line-height: 1.75;
}
.about-content p:last-of-type {
  margin-bottom: 0;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.stat-item {
  text-align: left;
}
.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ==========================================================================
   CTA / Contact
   ========================================================================== */

.cta-section {
  text-align: center;
  padding: var(--space-5xl) var(--space-lg);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.04);
}

.cta-title {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
}

.cta-desc {
  margin: 0 0 var(--space-xl);
  color: var(--color-text-muted);
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   Contact page
   ========================================================================== */

.contact-inner {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.contact-info {
  margin-bottom: var(--space-2xl);
}

.contact-info h2 {
  margin: 0 0 var(--space-lg);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

.contact-info p {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

.contact-info a {
  color: var(--color-accent);
}

.contact-cta {
  margin-top: var(--space-xl);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--space-4xl) var(--space-lg) var(--space-xl);
}

.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  gap: var(--space-2xl);
  grid-template-columns: 1fr;
  margin-bottom: var(--space-2xl);
}

.footer-brand .logo {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
  color: #fff;
}
.footer-brand .logo:hover {
  color: #fff;
}
.footer-brand .logo-accent {
  color: var(--color-accent);
}
.footer-tagline {
  font-size: 0.9375rem;
  margin: 0 0 var(--space-lg);
  max-width: 280px;
  opacity: 0.85;
}
.footer-social {
  display: flex;
  gap: var(--space-lg);
}
.footer-social a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
}
.footer-social a:hover {
  color: var(--color-accent);
}

.footer-heading {
  margin: 0 0 var(--space-md);
  font-size: 0.8125rem;
  font-weight: 600;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-links li {
  margin-bottom: var(--space-sm);
}
.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9375rem;
}
.footer-links a:hover {
  color: #fff;
}

.footer-contact p {
  margin: 0 0 var(--space-sm);
}
.footer-contact a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9375rem;
}
.footer-contact a:hover {
  color: #fff;
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
}
.footer-bottom p {
  margin: 0;
  font-size: 0.875rem;
  opacity: 0.7;
}

/* ==========================================================================
   Desktop
   ========================================================================== */

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

  .nav {
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    padding-top: 0;
    padding-left: 0;
    padding-right: 0;
    padding-bottom: 0;
    transform: none;
    background: none;
    overflow: visible;
  }

  .nav-close {
    display: none;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-xl);
    font-size: 0.9375rem;
    padding-top: 0;
  }

  .nav-list li {
    border-bottom: none;
  }
  .nav-list li:last-child {
    margin-top: 0;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    padding: var(--space-sm) 0;
    white-space: nowrap;
  }

  .nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-sm) var(--space-lg);
    margin-left: var(--space-md);
  }

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

  .home-links .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .about-inner {
    grid-template-columns: 1fr 1fr;
  }

  .about-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .value-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}