/* ============================================
   CONSTRUCTION VALLEY - Design System
   Premium EPC & Fit-Out Corporate Template
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Colors */
  --primary-deep: #0B1B3D;
  --primary-deep-rgb: 11, 27, 61;
  --accent-amber: #E67E22;
  --accent-amber-hover: #D35400;
  --accent-amber-rgb: 230, 126, 34;
  --bg-offwhite: #F8F9FA;
  --bg-lightgray: #F1F2F6;
  --text-charcoal: #2C3E50;
  --text-white: #FFFFFF;
  --text-muted: #7F8C8D;
  --border-light: #E0E0E0;
  --overlay-dark: rgba(11, 27, 61, 0.85);
  --overlay-medium: rgba(11, 27, 61, 0.6);
  --overlay-light: rgba(11, 27, 61, 0.3);

  /* Typography */
  --font-heading: 'Poppins', 'Montserrat', sans-serif;
  --font-body: 'Inter', 'Poppins', sans-serif;

  /* Spacing */
  --section-padding: 100px 0;
  --container-max: 1280px;
  --container-padding: 0 40px;

  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: all 0.25s ease;
  --transition-slow: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--text-charcoal);
  background-color: var(--text-white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-deep);
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
h4 { font-size: 1.1rem; }

p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-charcoal);
}

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

/* --- Utility Classes --- */
.text-center { text-align: center; }
.text-white { color: var(--text-white); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-amber); }
.bg-primary { background-color: var(--primary-deep); }
.bg-offwhite { background-color: var(--bg-offwhite); }
.bg-lightgray { background-color: var(--bg-lightgray); }

.section-label {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-amber);
  margin-bottom: 16px;
  position: relative;
  padding-left: 40px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 2px;
  background: var(--accent-amber);
}

.section-title {
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.8;
}

.section-subtitle.centered {
  margin: 0 auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 2px solid transparent;
  border-radius: 0;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s ease;
}

.btn:hover::after {
  left: 100%;
}

.btn-primary {
  background-color: var(--accent-amber);
  color: var(--text-white);
  border-color: var(--accent-amber);
}

.btn-primary:hover {
  background-color: var(--accent-amber-hover);
  border-color: var(--accent-amber-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(230, 126, 34, 0.35);
}

.btn-outline-white {
  background: transparent;
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
  background: var(--text-white);
  color: var(--primary-deep);
  border-color: var(--text-white);
  transform: translateY(-2px);
}

.btn-arrow {
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 24px 0;
  transition: var(--transition-smooth);
}

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

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

.logo-icon {
  width: 52px;
  height: 52px;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--text-white);
  letter-spacing: 1px;
  line-height: 1.1;
}

.logo-text span {
  display: block;
  font-weight: 300;
  font-size: 0.65rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-amber);
  transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px !important;
  background: var(--accent-amber);
  color: var(--text-white) !important;
  font-weight: 600 !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  background: var(--accent-amber-hover);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.menu-toggle span {
  width: 28px;
  height: 2px;
  background: var(--text-white);
  transition: var(--transition-fast);
  display: block;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* ============================================
   SECTION 1: HERO
   ============================================ */
.hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(11, 27, 61, 0.92) 0%, rgba(11, 27, 61, 0.7) 50%, rgba(11, 27, 61, 0.85) 100%),
    url('../images/hero-bg.jpg') center/cover no-repeat;
  z-index: 1;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 120px;
  background: linear-gradient(to top, var(--text-white), transparent);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 900px;
  padding: 0 40px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  background: rgba(230, 126, 34, 0.15);
  border: 1px solid rgba(230, 126, 34, 0.3);
  border-radius: 40px;
  margin-bottom: 36px;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent-amber);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s 0.3s forwards;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-amber);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero h1 {
  color: var(--text-white);
  font-weight: 800;
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1.1;
  margin-bottom: 28px;
  letter-spacing: -1px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s 0.5s forwards;
}

.hero h1 .highlight {
  color: var(--accent-amber);
  position: relative;
}

.hero-subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.75);
  max-width: 680px;
  margin: 0 auto 48px;
  line-height: 1.9;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s 0.7s forwards;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s 0.9s forwards;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0;
  animation: fadeInUp 0.8s 1.2s forwards;
}

.hero-scroll-indicator span {
  font-family: var(--font-heading);
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent-amber), transparent);
  animation: scrollPulse 2s infinite;
}

/* ============================================
   SECTION 2: CORE EXPERTISE (TABS)
   ============================================ */
.expertise {
  padding: var(--section-padding);
  background: var(--text-white);
}

.expertise-header {
  margin-bottom: 64px;
}

.expertise-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 0;
  min-height: 480px;
  border: 1px solid var(--border-light);
}

/* Tab Navigation */
.expertise-tabs {
  background: var(--bg-lightgray);
  padding: 0;
  display: flex;
  flex-direction: column;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 28px 32px;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-align: left;
  position: relative;
}

.tab-btn:last-child {
  border-bottom: none;
}

.tab-btn::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--accent-amber);
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.tab-btn:hover {
  background: rgba(11, 27, 61, 0.04);
}

.tab-btn.active {
  background: var(--text-white);
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.06);
}

.tab-btn.active::before {
  transform: scaleY(1);
}

.tab-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(11, 27, 61, 0.06);
  border-radius: 10px;
  font-size: 1.3rem;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.tab-btn.active .tab-icon {
  background: var(--accent-amber);
  color: var(--text-white);
}

.tab-label {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary-deep);
  letter-spacing: 0.3px;
}

.tab-sublabel {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Tab Content */
.expertise-content {
  padding: 52px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.tab-panel {
  display: none;
  animation: fadeIn 0.5s ease;
}

.tab-panel.active {
  display: block;
}

.tab-panel h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-deep);
}

.tab-panel p {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-muted);
  margin-bottom: 28px;
}

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

.tab-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bg-offwhite);
  border-left: 3px solid var(--accent-amber);
  transition: var(--transition-fast);
}

.tab-feature:hover {
  background: var(--bg-lightgray);
  transform: translateX(4px);
}

.tab-feature-icon {
  color: var(--accent-amber);
  font-size: 1rem;
  flex-shrink: 0;
}

.tab-feature span {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary-deep);
}

/* ============================================
   SECTION 3: CREDIBILITY / PARTNERS
   ============================================ */
.partners {
  padding: 80px 0;
  background: var(--bg-offwhite);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.partners-header {
  text-align: center;
  margin-bottom: 56px;
}

.partners-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary-deep);
}

.partners-header p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.partners-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
}

.partner-logo {
  width: 130px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: grayscale(100%) opacity(0.45);
  transition: var(--transition-smooth);
}

.partner-logo:hover {
  filter: grayscale(0%) opacity(1);
}

.partner-logo svg {
  width: 100%;
  height: 100%;
}

/* ============================================
   SECTION 4: PROJECT SHOWCASE
   ============================================ */
.projects {
  padding: var(--section-padding);
  background: var(--text-white);
}

.projects-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 64px;
}

.projects-header .section-subtitle {
  max-width: 480px;
}

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

.project-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--primary-deep);
}

.project-card-link {
  display: block;
  text-decoration: none;
}

.project-thumb {
  position: relative;
  width: 100%;
  padding-top: 120%;
  overflow: hidden;
}

.project-thumb-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.project-card:hover .project-thumb-bg {
  transform: scale(1.08);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 27, 61, 0.9) 0%, rgba(11, 27, 61, 0.1) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px 28px;
  transition: var(--transition-smooth);
}

.project-card:hover .project-overlay {
  background: linear-gradient(to top, rgba(11, 27, 61, 0.95) 0%, rgba(11, 27, 61, 0.4) 60%, rgba(11, 27, 61, 0.2) 100%);
}

.project-tag {
  display: inline-block;
  padding: 5px 14px;
  background: var(--accent-amber);
  color: var(--text-white);
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 14px;
  width: fit-content;
}

.project-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
  line-height: 1.3;
}

.project-location {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 14px;
}

.project-arrow {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  font-size: 1rem;
  transition: var(--transition-fast);
  transform: translateY(10px);
  opacity: 0;
}

.project-card:hover .project-arrow {
  transform: translateY(0);
  opacity: 1;
  border-color: var(--accent-amber);
  background: var(--accent-amber);
}

/* ============================================
   SECTION 6: LEAD CAPTURE FORM
   ============================================ */
.contact {
  padding: var(--section-padding);
  background: var(--primary-deep);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(230, 126, 34, 0.05);
}

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

.contact-info h2 {
  color: var(--text-white);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 24px;
  line-height: 1.2;
}

.contact-info h2 .highlight {
  color: var(--accent-amber);
}

.contact-info p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 40px;
}

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

.contact-detail {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-detail-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(230, 126, 34, 0.1);
  border: 1px solid rgba(230, 126, 34, 0.2);
  color: var(--accent-amber);
  font-size: 1rem;
  flex-shrink: 0;
}

.contact-detail-text {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

.contact-detail-text strong {
  display: block;
  color: var(--text-white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 2px;
}

/* Contact Form */
.contact-form-wrapper {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 48px;
}

.contact-form-wrapper h3 {
  color: var(--text-white);
  font-size: 1.3rem;
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition-fast);
  outline: none;
  border-radius: 0;
  -webkit-appearance: none;
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent-amber);
  background: rgba(230, 126, 34, 0.06);
}

.form-group select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23E67E22' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-group select option {
  background: var(--primary-deep);
  color: var(--text-white);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.btn-submit {
  width: 100%;
  padding: 18px;
  margin-top: 8px;
  font-size: 0.85rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: #060E20;
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-brand .logo-text {
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-white);
  margin-bottom: 24px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.4);
  transition: var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--accent-amber);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.3);
}

.footer-socials {
  display: flex;
  gap: 16px;
}

.footer-social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.4);
  transition: var(--transition-fast);
}

.footer-social-link:hover {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
  background: rgba(230, 126, 34, 0.1);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes scrollPulse {
  0% {
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
    transform-origin: top;
  }
  100% {
    opacity: 0;
    transform: scaleY(1);
    transform-origin: bottom;
  }
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px 0;
    --container-padding: 0 24px;
  }

  .expertise-grid {
    grid-template-columns: 280px 1fr;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

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

  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--primary-deep);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 28px;
    transition: right 0.4s ease;
    box-shadow: -4px 0 30px rgba(0, 0, 0, 0.3);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    font-size: 0.9rem;
  }

  .hero h1 {
    font-size: clamp(1.8rem, 7vw, 2.6rem);
  }

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

  .expertise-tabs {
    flex-direction: row;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab-btn {
    min-width: 180px;
    padding: 20px 24px;
    border-bottom: none;
    border-right: 1px solid var(--border-light);
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

  .tab-btn::before {
    left: 0;
    top: auto;
    bottom: 0;
    width: 100%;
    height: 3px;
    transform: scaleX(0);
  }

  .tab-btn.active::before {
    transform: scaleX(1);
  }

  .tab-features {
    grid-template-columns: 1fr;
  }

  .expertise-content {
    padding: 36px 28px;
  }

  .projects-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: 32px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .partners-grid {
    gap: 32px;
  }

  .partner-logo {
    width: 100px;
    height: 45px;
  }
}

@media (max-width: 480px) {
  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }

  .hero-ctas .btn {
    width: 100%;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }
}

/* ============================================
   PROJECT DETAIL PAGE
   ============================================ */
.project-hero {
  position: relative;
  width: 100%;
  height: 60vh;
  min-height: 400px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.project-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.project-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 27, 61, 0.95) 0%, rgba(11, 27, 61, 0.3) 60%, transparent 100%);
}

.project-hero-content {
  position: relative;
  z-index: 2;
  padding: 48px 40px;
  width: 100%;
}

.project-hero-content .container {
  max-width: var(--container-max);
}

.project-hero-content h1 {
  color: var(--text-white);
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin-bottom: 8px;
}

.project-hero-content p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 1rem;
}

.project-detail {
  padding: 80px 0;
}

.project-detail-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 60px;
}

/* Fact Sheet Sidebar */
.fact-sheet {
  position: sticky;
  top: 40px;
  align-self: start;
  background: var(--bg-offwhite);
  padding: 40px 32px;
  border-left: 4px solid var(--accent-amber);
}

.fact-sheet h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}

.fact-item {
  margin-bottom: 20px;
}

.fact-item label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.fact-item span {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--primary-deep);
}

/* Project Content */
.project-content h2 {
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.project-content .lead {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-charcoal);
  margin-bottom: 20px;
  line-height: 1.8;
}

.project-content p {
  margin-bottom: 20px;
}

.project-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  padding-top: 70%;
}

.gallery-item img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item:first-child {
  grid-column: 1 / -1;
  padding-top: 50%;
}

@media (max-width: 768px) {
  .project-detail-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .fact-sheet {
    position: static;
  }

  .project-gallery {
    grid-template-columns: 1fr;
  }

  .gallery-item:first-child {
    grid-column: auto;
    padding-top: 70%;
  }
}

/* ============================================
   VISION & MISSION
   ============================================ */
.vision-mission {
  padding: 100px 0;
  background: var(--bg-offwhite);
}

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

.vm-card {
  background: var(--text-white);
  padding: 48px 40px;
  border-left: 4px solid var(--accent-amber);
  transition: var(--transition-smooth);
}

.vm-card:hover {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.vm-icon {
  margin-bottom: 24px;
}

.vm-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary-deep);
}

.vm-card p {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.vm-quote {
  font-style: italic;
  font-weight: 500;
  color: var(--primary-deep) !important;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  margin-top: 16px !important;
  font-size: 0.9rem !important;
}

.vm-list {
  list-style: none;
  padding: 0;
  margin-top: 16px;
}

.vm-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--primary-deep);
}

.vm-list li svg {
  flex-shrink: 0;
}

/* ============================================
   HOW IT WORKS
   ============================================ */
.how-it-works {
  padding: 100px 0;
  background: var(--text-white);
}

.hiw-header {
  text-align: center;
  margin-bottom: 64px;
}

.hiw-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.hiw-timeline::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-amber), rgba(230, 126, 34, 0.2));
}

.hiw-step {
  display: grid;
  grid-template-columns: 50px 1fr 50px;
  gap: 24px;
  align-items: start;
  padding: 28px 0;
  position: relative;
}

.hiw-number {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-amber);
  background: var(--text-white);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--accent-amber);
  border-radius: 50%;
  position: relative;
  z-index: 2;
}

.hiw-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary-deep);
  margin-bottom: 8px;
}

.hiw-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.hiw-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.6;
}

/* ============================================
   WHY CHOOSE US
   ============================================ */
.why-us {
  padding: 100px 0;
  background: var(--primary-deep);
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}

.why-info h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.3;
}

.why-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.why-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 32px;
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 20px;
  align-items: start;
  transition: var(--transition-smooth);
}

.why-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(230, 126, 34, 0.3);
  transform: translateX(4px);
}

.why-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(230, 126, 34, 0.1);
  border-radius: 12px;
  flex-shrink: 0;
}

.why-card-text {
  min-width: 0;
}

.why-card-text h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
}

.why-card-text p {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.8;
}

/* ============================================
   RESPONSIVE - NEW SECTIONS
   ============================================ */
@media (max-width: 768px) {
  .vm-grid {
    grid-template-columns: 1fr;
  }

  .vm-card {
    padding: 32px 24px;
  }

  .hiw-step {
    grid-template-columns: 40px 1fr;
    gap: 16px;
  }

  .hiw-timeline::before {
    left: 19px;
  }

  .hiw-number {
    width: 40px;
    height: 40px;
    font-size: 0.9rem;
  }

  .hiw-icon {
    display: none;
  }

  .why-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .why-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .why-card-icon {
    width: 48px;
    height: 48px;
  }
}

/* ===========================
   PROJECT GALLERY
   =========================== */
.project-gallery {
  padding: 60px 0 80px;
  background: var(--bg-dark);
}

.project-gallery .section-label {
  color: var(--accent-amber);
}

.project-gallery h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 32px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.gallery-item {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.02);
}

.gallery-item:first-child {
  grid-column: span 2;
  grid-row: span 2;
  aspect-ratio: auto;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11,17,32,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay span {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.5px;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.95);
  z-index: 10000;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox img {
  max-width: 90%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 8px;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.lightbox-nav:hover {
  background: rgba(255,255,255,0.2);
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

.lightbox-counter {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 2px;
}

@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .gallery-item:first-child {
    grid-column: span 2;
    grid-row: span 1;
    aspect-ratio: 16/9;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-item:first-child {
    grid-column: span 1;
  }
}