/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --orange: #E8401A;
  --orange-light: #f05a38;
  --dark: #1a1a1a;
  --dark2: #232323;
  --gray: #6b7280;
  --gray-light: #f4f4f4;
  --white: #ffffff;
  --border: #e5e7eb;
  --font: 'Inter', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===== CONTAINER ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(26,26,26,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(26,26,26,0.99);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
}

.logo-icon {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  height: 28px;
}

.logo-icon span {
  display: block;
  width: 5px;
  background: var(--orange);
  border-radius: 2px;
}

.logo-icon span:nth-child(1) { height: 14px; }
.logo-icon span:nth-child(2) { height: 20px; }
.logo-icon span:nth-child(3) { height: 28px; }

.logo-icon-sm span:nth-child(1) { height: 10px; }
.logo-icon-sm span:nth-child(2) { height: 16px; }
.logo-icon-sm span:nth-child(3) { height: 22px; }

.logo-text {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1.5px;
  line-height: 1.2;
}

.logo-text strong { font-weight: 800; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: rgba(255,255,255,0.75);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

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

.btn-nav {
  background: var(--orange);
  color: var(--white) !important;
  padding: 9px 20px;
  border-radius: 6px;
  font-size: 13px !important;
  font-weight: 600 !important;
  transition: background 0.2s !important;
}

.btn-nav:hover { background: var(--orange-light) !important; }

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

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  transition: background 0.2s, transform 0.2s;
}

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

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--white);
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid rgba(255,255,255,0.3);
  transition: border-color 0.2s, background 0.2s;
}

.btn-secondary:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.08);
}

.btn-full { width: 100%; text-align: center; border: none; cursor: pointer; font-family: var(--font); }

/* ===== SECTION COMMONS ===== */
.section { padding: 96px 0; }

.section-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.5px;
  color: var(--orange);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--dark);
  margin-bottom: 20px;
}

.section-sub {
  font-size: 17px;
  color: var(--gray);
  max-width: 680px;
  margin: 0 auto 56px;
  text-align: center;
  line-height: 1.7;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(135deg, #111 0%, #1e1e1e 40%, #2a1a15 100%);
  overflow: hidden;
  padding-top: 68px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(232,64,26,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(232,64,26,0.08) 0%, transparent 50%);
}

/* Grid pattern overlay */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-overlay { position: absolute; inset: 0; }

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px 40px;
}

.hero-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--orange);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero-title span { color: var(--orange); }

.hero-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.65);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 64px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.06);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.stat {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(255,255,255,0.02);
}

.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--orange);
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  font-weight: 500;
}

/* ===== ABOUT ===== */
.about { background: var(--white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text p {
  color: var(--gray);
  margin-bottom: 18px;
  font-size: 16px;
  line-height: 1.75;
}

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

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

.value-card {
  background: var(--gray-light);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border);
  transition: border-color 0.2s, transform 0.2s;
}

.value-card:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.value-card:last-child { grid-column: 1 / -1; }

.value-icon { font-size: 24px; margin-bottom: 10px; }
.value-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.value-card p { font-size: 13px; color: var(--gray); line-height: 1.5; }

/* ===== PRS ===== */
.prs {
  background: var(--gray-light);
}

.prs .section-title, .prs > .container > p.section-tag { text-align: center; }
.prs > .container > .section-sub { text-align: center; }

.compare-table {
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 56px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.05);
}

.compare-header, .compare-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.3fr;
}

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

.compare-col {
  padding: 16px 20px;
  font-size: 14px;
}

.compare-header .compare-col { font-weight: 600; }
.compare-header .prs-col { background: var(--orange); }
.compare-header .prs-col span { display: block; font-size: 11px; font-weight: 400; opacity: 0.8; }

.compare-row { border-top: 1px solid var(--border); }
.compare-row:hover { background: #fafafa; }

.compare-col.label { font-weight: 600; font-size: 13px; color: var(--dark); }
.compare-col.conventional { color: var(--gray); font-size: 13px; }
.compare-col.prs-col { font-size: 13px; }
.compare-col.good { color: #16a34a; font-weight: 600; }

.prs-types { text-align: center; }
.prs-types h3 { font-size: 22px; font-weight: 700; margin-bottom: 32px; }

.prs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.prs-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-align: left;
  transition: border-color 0.2s, transform 0.2s;
}

.prs-card:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.prs-card h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--orange);
  margin-bottom: 8px;
}

.prs-card p { font-size: 13px; color: var(--gray); line-height: 1.5; }

/* ===== SECTORS ===== */
.sectors { background: var(--white); }
.sectors .section-tag, .sectors .section-title { text-align: center; }

.sectors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.sector-card {
  background: var(--gray-light);
  border-radius: 16px;
  padding: 32px 24px;
  border: 1px solid var(--border);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.sector-card:hover {
  border-color: var(--orange);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(232,64,26,0.1);
}

.sector-icon { font-size: 32px; margin-bottom: 16px; }

.sector-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--dark);
}

.sector-card ul { display: flex; flex-direction: column; gap: 8px; }

.sector-card li {
  font-size: 13px;
  color: var(--gray);
  padding-left: 14px;
  position: relative;
}

.sector-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
}

/* ===== PROJECTS ===== */
.projects { background: var(--dark); }
.projects .section-tag { color: var(--orange); }
.projects .section-title { color: var(--white); }
.projects .section-tag, .projects .section-title { text-align: center; }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.project-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 28px 24px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
  position: relative;
}

.project-card:hover {
  border-color: var(--orange);
  background: rgba(232,64,26,0.06);
  transform: translateY(-4px);
}

.project-badge {
  display: inline-block;
  background: rgba(232,64,26,0.15);
  color: var(--orange);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.project-card h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 6px;
}

.project-type {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 18px;
  line-height: 1.4;
}

.project-specs { display: flex; flex-direction: column; gap: 10px; }

.project-specs li {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.project-specs li span {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: rgba(255,255,255,0.3);
}

/* ===== CERTIFICATIONS ===== */
.certifications { background: var(--gray-light); }
.certifications .section-tag, .certifications .section-title { text-align: center; }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-bottom: 64px;
}

.cert-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 16px;
  text-align: center;
  transition: border-color 0.2s, transform 0.2s;
}

.cert-card:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.cert-logo {
  font-size: 15px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 10px;
  line-height: 1.2;
}

.cert-card p { font-size: 11px; color: var(--gray); line-height: 1.4; }

.process-steps { text-align: center; }
.process-steps h3 { font-size: 22px; font-weight: 700; margin-bottom: 40px; }

.steps {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.step {
  flex: 1;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: left;
}

.step-num {
  font-size: 40px;
  font-weight: 800;
  color: var(--orange);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 12px;
}

.step h4 { font-size: 16px; font-weight: 700; margin-bottom: 12px; }
.step p { font-size: 14px; color: var(--gray); line-height: 1.6; }

.step-arrow {
  font-size: 24px;
  color: var(--orange);
  margin-top: 60px;
  flex-shrink: 0;
}

/* ===== CONTACT ===== */
.contact { background: var(--white); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.contact-info p {
  font-size: 16px;
  color: var(--gray);
  margin-bottom: 36px;
  line-height: 1.7;
}

.contact-details { display: flex; flex-direction: column; gap: 20px; }

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  font-size: 20px;
  width: 44px;
  height: 44px;
  background: rgba(232,64,26,0.08);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item strong { font-size: 13px; font-weight: 700; display: block; margin-bottom: 2px; }
.contact-item div { font-size: 14px; color: var(--gray); }

/* Form */
.contact-form {
  background: var(--gray-light);
  border-radius: 20px;
  padding: 40px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group { display: flex; flex-direction: column; gap: 8px; }

label {
  font-size: 13px;
  font-weight: 600;
  color: var(--dark);
}

input, select, textarea {
  font-family: var(--font);
  font-size: 14px;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--white);
  color: var(--dark);
  outline: none;
  transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--orange);
}

textarea { resize: vertical; }

/* ===== FOOTER ===== */
.footer {
  background: var(--dark);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.4); line-height: 1.6; }

.footer h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.footer-links ul { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.45); transition: color 0.2s; }
.footer-links a:hover { color: var(--white); }

.footer-contact p { font-size: 14px; color: rgba(255,255,255,0.45); margin-bottom: 8px; }

.footer-bottom {
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.25); }

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .sectors-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }

  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: rgba(26,26,26,0.98);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }

  .nav-links.open { display: flex; }

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

  .prs-grid { grid-template-columns: repeat(2, 1fr); }
  .sectors-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .compare-header, .compare-row { grid-template-columns: 1fr 1fr; }
  .compare-col.label { display: none; }
  .steps { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); margin: 0 auto; }
  .contact-form { padding: 28px 20px; }
  .values-grid { grid-template-columns: 1fr; }
  .value-card:last-child { grid-column: 1; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 32px; }
  .hero-cta { flex-direction: column; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .prs-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
}