/* ========================================
   ALPHA Ontario Construction - Main CSS
   ======================================== */

:root {
  --red: #E53935;
  --red-dark: #C62828;
  --navy: #1E2A38;
  --navy-light: #263445;
  --white: #FFFFFF;
  --light-gray: #F5F7FA;
  --gray: #8898A4;
  --text: #1E2A38;
  --shadow: 0 4px 24px rgba(30,42,56,0.10);
  --shadow-lg: 0 8px 40px rgba(30,42,56,0.16);
  --radius: 10px;
  --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

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

ul { list-style: none; }

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

/* ---- TYPOGRAPHY ---- */
h1, h2, h3, h4 { font-weight: 800; line-height: 1.15; }
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); }
h3 { font-size: 1.25rem; }

.section-label {
  display: inline-block;
  color: var(--red);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.section-title {
  color: var(--navy);
  margin-bottom: 0.8rem;
}

.section-sub {
  color: var(--gray);
  font-size: 1.05rem;
  max-width: 600px;
}

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

section { padding: 80px 0; }

.center { text-align: center; }
.center .section-sub { margin: 0 auto; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 6px;
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--red);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--red-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(229,57,53,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.7);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--white);
  transform: translateY(-2px);
}

.btn-navy {
  background: var(--navy);
  color: var(--white);
}
.btn-navy:hover {
  background: var(--navy-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* ---- NAVBAR ---- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--navy);
  box-shadow: 0 2px 16px rgba(0,0,0,0.18);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(30,42,56,0.97);
  backdrop-filter: blur(8px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 120px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-img {
  height: 170px;
  width: auto;
  display: block;
  mix-blend-mode: screen;
  filter: brightness(1.15) contrast(1.05);
}

.footer-brand .logo-img {
  height: 180px;
}

.invoice-logo .logo-img {
  height: 110px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  color: rgba(255,255,255,0.82);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 6px;
  transition: var(--transition);
  letter-spacing: 0.3px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  background: rgba(255,255,255,0.08);
}

.nav-cta {
  background: var(--red) !important;
  color: var(--white) !important;
  padding: 8px 18px !important;
}
.nav-cta:hover {
  background: var(--red-dark) !important;
}

.nav-phone {
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
  font-weight: 600;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.hamburger span {
  width: 24px;
  height: 2.5px;
  background: white;
  border-radius: 2px;
  transition: var(--transition);
  display: block;
}

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, rgba(30,42,56,0.88) 0%, rgba(30,42,56,0.72) 100%),
              url('../images/hero-bg.jpg') center/cover no-repeat;
  display: flex;
  align-items: center;
  padding-top: 120px;
}

.hero-content {
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(229,57,53,0.18);
  border: 1px solid rgba(229,57,53,0.4);
  color: #FF8A80;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 30px;
  margin-bottom: 24px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 20px;
}

.hero h1 span { color: var(--red); }

.hero-sub {
  color: rgba(255,255,255,0.8);
  font-size: 1.12rem;
  margin-bottom: 36px;
  max-width: 560px;
}

.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.15);
  flex-wrap: wrap;
}

.stat-item { text-align: left; }
.stat-num {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--white);
  line-height: 1;
}
.stat-num span { color: var(--red); }
.stat-label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

/* ---- SERVICES PREVIEW ---- */
.services-preview { background: var(--light-gray); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 4px solid transparent;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 56px;
  height: 56px;
  background: rgba(229,57,53,0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.service-card h3 {
  color: var(--navy);
  margin-bottom: 10px;
}

.service-card p {
  color: var(--gray);
  font-size: 0.93rem;
  line-height: 1.65;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--red);
  font-size: 0.9rem;
  font-weight: 700;
  margin-top: 18px;
  transition: var(--transition);
}
.service-link:hover { gap: 10px; }

/* ---- ABOUT SECTION ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.about-img-grid img {
  border-radius: var(--radius);
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.about-img-grid img:first-child {
  grid-column: 1 / -1;
  height: 240px;
}

.about-text .section-sub { margin-bottom: 24px; }

.about-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 28px 0 32px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.feature-dot {
  width: 10px;
  height: 10px;
  background: var(--red);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 6px;
}

.feature-item p {
  color: var(--gray);
  font-size: 0.95rem;
}

/* ---- GALLERY ---- */
.gallery { background: var(--navy); }
.gallery .section-title { color: var(--white); }
.gallery .section-sub { color: rgba(255,255,255,0.6); }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 48px;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  cursor: pointer;
}

.gallery-item:nth-child(1),
.gallery-item:nth-child(5) {
  grid-column: span 2;
}

.gallery-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item:nth-child(1) img,
.gallery-item:nth-child(5) img {
  height: 280px;
}

.gallery-item:hover img { transform: scale(1.07); }

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(229,57,53,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

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

.gallery-overlay span {
  color: white;
  font-size: 2rem;
}

/* ---- CTA BANNER ---- */
.cta-banner {
  background: var(--red);
  padding: 64px 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-text h2 { color: var(--white); font-size: 2rem; }
.cta-text p { color: rgba(255,255,255,0.85); margin-top: 8px; }

.cta-btns { display: flex; gap: 14px; flex-wrap: wrap; }

.btn-white {
  background: var(--white);
  color: var(--red);
  font-weight: 800;
}
.btn-white:hover {
  background: var(--light-gray);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.7);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--white);
}

/* ---- PAGE HERO (inner pages) ---- */
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  padding: 130px 0 70px;
  text-align: center;
}

.page-hero h1 { color: var(--white); margin-bottom: 14px; }
.page-hero p { color: rgba(255,255,255,0.72); font-size: 1.1rem; }

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 18px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.5);
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--red); }

/* ---- SERVICES PAGE ---- */
.service-section {
  padding: 80px 0;
  border-bottom: 1px solid #EEF0F4;
}

.service-section:nth-child(even) { background: var(--light-gray); }

.service-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.service-section:nth-child(even) .service-detail-grid { direction: rtl; }
.service-section:nth-child(even) .service-detail-content { direction: ltr; }

.service-detail-img img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.service-detail-content .section-title { margin-bottom: 16px; }
.service-detail-content p {
  color: var(--gray);
  margin-bottom: 24px;
}

.service-bullets {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-bullet {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text);
}

.bullet-icon {
  color: var(--red);
  font-weight: 900;
  font-size: 1.1rem;
  flex-shrink: 0;
  line-height: 1.4;
}

/* ---- PROJECTS PAGE ---- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.project-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--white);
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.project-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.project-info {
  padding: 18px 20px;
}

.project-tag {
  display: inline-block;
  background: rgba(229,57,53,0.1);
  color: var(--red);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.project-info h3 { color: var(--navy); margin-bottom: 6px; }
.project-info p { color: var(--gray); font-size: 0.9rem; }

/* ---- ABOUT PAGE ---- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.value-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: var(--transition);
}

.value-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.value-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.value-card h3 { color: var(--navy); margin-bottom: 10px; }
.value-card p { color: var(--gray); font-size: 0.93rem; }

.team-section { background: var(--light-gray); }

/* ---- CONTACT PAGE ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 56px;
  align-items: start;
}

.contact-info h3 { color: var(--navy); margin-bottom: 24px; }

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

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

.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(229,57,53,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item h4 { color: var(--navy); font-size: 0.9rem; margin-bottom: 3px; }
.contact-item p, .contact-item a { color: var(--gray); font-size: 0.95rem; }
.contact-item a:hover { color: var(--red); }

/* ---- FORMS ---- */
.form-card {
  background: var(--white);
  border-radius: 14px;
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

.form-card h3 { color: var(--navy); margin-bottom: 28px; font-size: 1.4rem; }

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.3px;
}

.form-group input,
.form-group textarea,
.form-group select {
  border: 1.5px solid #DDE3EE;
  border-radius: 7px;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: #FAFBFD;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--red);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(229,57,53,0.1);
}

.form-group textarea { resize: vertical; min-height: 130px; }

.form-submit {
  width: 100%;
  justify-content: center;
  font-size: 1rem;
  padding: 15px;
  border-radius: 8px;
}

/* ---- INVOICE PAGE ---- */
.invoice-wrapper {
  max-width: 780px;
  margin: 0 auto;
}

.invoice-header-bar {
  background: var(--navy);
  color: white;
  border-radius: 12px 12px 0 0;
  padding: 28px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.invoice-logo .logo-alpha { font-size: 2.1rem; }
.invoice-logo .logo-sub { font-size: 0.9rem; }

.invoice-title-block { text-align: right; }
.invoice-title-block h2 { font-size: 1.8rem; letter-spacing: 3px; color: rgba(255,255,255,0.9); }
.invoice-title-block p { color: rgba(255,255,255,0.5); font-size: 0.85rem; margin-top: 4px; }

.invoice-body {
  background: var(--white);
  border-radius: 0 0 12px 12px;
  padding: 36px;
  box-shadow: var(--shadow-lg);
}

.invoice-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
  padding-bottom: 28px;
  border-bottom: 1.5px solid #EEF0F4;
}

.invoice-meta label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
  display: block;
  margin-bottom: 6px;
}

.invoice-meta input {
  width: 100%;
  border: 1.5px solid #DDE3EE;
  border-radius: 7px;
  padding: 10px 14px;
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
  background: #FAFBFD;
}

.invoice-meta input:focus {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(229,57,53,0.1);
}

.invoice-table-wrap { overflow-x: auto; margin-bottom: 28px; }

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.invoice-table th {
  background: var(--navy);
  color: white;
  padding: 12px 16px;
  text-align: left;
  font-size: 0.82rem;
  letter-spacing: 0.5px;
}

.invoice-table td {
  padding: 12px 16px;
  border-bottom: 1px solid #EEF0F4;
}

.invoice-table td input {
  width: 100%;
  border: 1px solid #DDE3EE;
  border-radius: 5px;
  padding: 8px 10px;
  font-size: 0.92rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.invoice-table td input:focus {
  border-color: var(--red);
  box-shadow: 0 0 0 2px rgba(229,57,53,0.1);
}

.invoice-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 0.88rem;
}

.invoice-totals {
  max-width: 340px;
  margin-left: auto;
}

.total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid #EEF0F4;
  font-size: 0.95rem;
}

.total-row:last-child {
  border-bottom: none;
  border-top: 2px solid var(--navy);
  margin-top: 8px;
  padding-top: 14px;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--navy);
}

.total-label { color: var(--gray); }

.invoice-footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid #EEF0F4;
  gap: 16px;
  flex-wrap: wrap;
}

.invoice-note {
  font-size: 0.85rem;
  color: var(--gray);
}

.invoice-btns { display: flex; gap: 12px; }

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .logo-alpha { font-size: 2.1rem; }

.footer-tagline {
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.7;
  max-width: 280px;
}

.footer-socials {
  display: flex;
  gap: 10px;
  margin-top: 24px;
}

.social-btn {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  transition: var(--transition);
}

.social-btn:hover {
  background: var(--red);
  color: white;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--red);
  padding-left: 4px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: rgba(255,255,255,0.55);
  font-size: 0.88rem;
}

.footer-contact-item span:first-child { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  color: rgba(255,255,255,0.35);
  font-size: 0.83rem;
}

/* ---- ICON STYLES ---- */
.service-icon i {
  font-size: 1.5rem;
  color: var(--red);
}

.value-icon i {
  font-size: 2rem;
  color: var(--red);
}

.contact-icon i {
  font-size: 1.1rem;
  color: var(--red);
}

.gallery-overlay i {
  font-size: 1.8rem;
  color: white;
}

.bullet-icon i {
  font-size: 0.8rem;
  color: var(--red);
}

.footer-contact-item i {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.6);
  margin-top: 2px;
  flex-shrink: 0;
  width: 16px;
  text-align: center;
}

.social-btn i {
  font-size: 0.85rem;
}

.hero-badge i {
  color: #FFD54F;
}

/* ---- MOBILE CALL BUTTON ---- */
.mobile-call-btn {
  display: none;
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  width: 58px;
  height: 58px;
  background: var(--red);
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(229,57,53,0.5);
  font-size: 1.3rem;
  color: white;
  transition: var(--transition);
  animation: pulse 2s infinite;
}

.mobile-call-btn:hover {
  background: var(--red-dark);
  transform: scale(1.1);
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(229,57,53,0.5); }
  50% { box-shadow: 0 4px 30px rgba(229,57,53,0.8); }
}

/* ---- SUCCESS MESSAGE ---- */
.form-success {
  display: none;
  background: rgba(76,175,80,0.1);
  border: 1px solid rgba(76,175,80,0.3);
  color: #2E7D32;
  padding: 16px 20px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-weight: 600;
}

/* ---- LIGHTBOX ---- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.lightbox.active { display: flex; }

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

.lightbox-close {
  position: fixed;
  top: 20px;
  right: 28px;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .gallery-item:nth-child(1),
  .gallery-item:nth-child(5) { grid-column: span 1; }
  .gallery-item img,
  .gallery-item:nth-child(1) img,
  .gallery-item:nth-child(5) img { height: 200px; }
}

@media (max-width: 768px) {
  section { padding: 56px 0; }

  .nav-links { display: none; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: var(--navy); padding: 16px 24px 24px; gap: 4px; box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 11px 14px; }
  .hamburger { display: flex; }

  .about-grid,
  .service-detail-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .service-section:nth-child(even) .service-detail-grid { direction: ltr; }

  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; text-align: center; }
  .mobile-call-btn { display: flex; }

  .invoice-header-bar { flex-direction: column; gap: 16px; text-align: center; }
  .invoice-title-block { text-align: center; }
  .invoice-meta { grid-template-columns: 1fr; }
  .invoice-footer-row { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .projects-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; }
  .invoice-btns { flex-direction: column; width: 100%; }
}