/* ============================================================
   MSB Civil — style.css
   Mobile-first, plain HTML/CSS/JS
   ============================================================ */

/* 1. Variables & Reset
   ============================================================ */
:root {
  --blue:         #1A6FFF;
  --blue-dark:    #0E55CC;
  --blue-light:   #E8F0FF;
  --dark:         #111111;
  --dark-2:       #1C1C1C;
  --dark-3:       #282828;
  --mid:          #444444;
  --gray:         #888888;
  --border:       #E5E5E5;
  --light:        #F6F6F4;
  --white:        #FFFFFF;
  --font:         'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --shadow:       0 2px 20px rgba(0,0,0,0.08);
  --shadow-lg:    0 8px 40px rgba(0,0,0,0.15);
  --radius:       6px;
  --transition:   0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  { font-family: var(--font); color: var(--dark); background: var(--white); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img   { max-width: 100%; height: auto; display: block; }
a     { color: inherit; text-decoration: none; }
ul    { list-style: none; }

/* 2. Typography
   ============================================================ */
h1 { font-size: clamp(2rem, 5.5vw, 3.6rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.025em; }
h2 { font-size: clamp(1.6rem, 4vw, 2.5rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.015em; }
h3 { font-size: clamp(1.05rem, 2.5vw, 1.3rem); font-weight: 600; line-height: 1.3; }

/* 3. Layout
   ============================================================ */
.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.section   { padding: 80px 0; }

/* Section header */
.section-header { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
}
.section-header p { color: var(--gray); margin-top: 14px; font-size: 1.05rem; line-height: 1.7; }
.section-dark .section-header p { color: #aaa; }

/* 4. Buttons
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; font-size: 0.95rem; font-weight: 600;
  border-radius: var(--radius); border: 2px solid transparent;
  transition: all var(--transition); cursor: pointer; white-space: nowrap;
  font-family: var(--font);
}
.btn-primary        { background: var(--blue); color: var(--white); }
.btn-primary:hover  { background: var(--blue-dark); }
.btn-dark           { background: var(--dark); color: var(--white); }
.btn-dark:hover     { background: #333; }
.btn-white          { background: var(--white); color: var(--dark); }
.btn-white:hover    { background: #f0f0f0; }
.btn-outline-white  { border-color: rgba(255,255,255,0.55); color: var(--white); }
.btn-outline-white:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }
.btn-outline-orange { border-color: var(--blue); color: var(--blue); }
.btn-outline-orange:hover { background: var(--blue); color: var(--white); }
.btn-nav { background: var(--blue); color: var(--white) !important; padding: 10px 22px; font-size: 0.88rem; }
.btn-nav:hover { background: var(--blue-dark); }

/* 5. Navigation
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--dark);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.4); }

.nav-container {
  display: flex; align-items: center;
  justify-content: space-between;
  height: 72px; gap: 20px;
}
.nav-logo img { height: 52px; width: auto; border-radius: 5px; }

.nav-links { display: none; flex-direction: column; }
.nav-links a {
  font-size: 0.9rem; font-weight: 500;
  color: rgba(255,255,255,0.75); padding: 10px 14px;
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); }

.hamburger {
  display: flex; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--white); border-radius: 2px;
  transition: all 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 6. Hero
   ============================================================ */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  background-repeat: no-repeat;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(130deg, rgba(17,17,17,0.88) 0%, rgba(17,17,17,0.62) 60%, rgba(17,17,17,0.45) 100%);
}
.hero-content {
  position: relative; z-index: 1;
  padding: 120px 20px 80px;
  max-width: 820px; color: var(--white);
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(26, 111, 255, 0.18);
  border: 1px solid rgba(26, 111, 255, 0.4);
  border-radius: 100px; padding: 6px 16px; margin-bottom: 24px;
}
.hero-eyebrow span {
  font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: #7EB3FF;
}
.hero h1 { margin-bottom: 22px; }
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.8);
  max-width: 620px; margin-bottom: 36px; line-height: 1.7;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 56px; }

.hero-trust { display: flex; flex-wrap: wrap; gap: 20px; }
.trust-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 500;
  color: rgba(255,255,255,0.7);
}
.trust-item svg { color: var(--blue); flex-shrink: 0; }

/* 7. Services Grid
   ============================================================ */
.services-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }

.service-card {
  background: var(--white); border-radius: 10px;
  padding: 32px; box-shadow: var(--shadow);
  border-top: 4px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--blue);
}
.service-icon {
  width: 52px; height: 52px;
  background: var(--blue-light); border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; color: var(--blue);
}
.service-card h3 { margin-bottom: 10px; }
.service-card p  { color: var(--gray); font-size: 0.93rem; line-height: 1.65; }
.card-link {
  display: inline-flex; align-items: center; gap: 5px;
  margin-top: 18px; font-size: 0.88rem; font-weight: 600;
  color: var(--blue); transition: gap var(--transition);
}
.card-link:hover { gap: 9px; }

/* 8. About Teaser
   ============================================================ */
.about-split { display: grid; grid-template-columns: 1fr; gap: 52px; align-items: center; }
.about-text h2 { margin-bottom: 18px; }
.about-text p  { color: rgba(255,255,255,0.75); line-height: 1.75; margin-bottom: 16px; font-size: 1rem; }
.about-text p:last-of-type { margin-bottom: 30px; }
.about-image img {
  border-radius: 12px; width: 100%;
  height: 360px; object-fit: cover;
}

.highlights { display: flex; flex-wrap: wrap; gap: 32px; margin-bottom: 36px; }
.highlight-item { display: flex; flex-direction: column; }
.highlight-num   { font-size: 2.2rem; font-weight: 800; color: var(--blue); line-height: 1; }
.highlight-label { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-top: 5px; text-transform: uppercase; letter-spacing: 0.06em; }

/* 9. Why Choose Us
   ============================================================ */
.why-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.why-card {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--white); border-radius: 10px; padding: 28px;
  box-shadow: var(--shadow);
}
.why-icon {
  width: 48px; height: 48px; flex-shrink: 0;
  background: var(--blue-light); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue);
}
.why-card h3 { margin-bottom: 6px; font-size: 1rem; }
.why-card p  { color: var(--gray); font-size: 0.9rem; line-height: 1.6; }

/* 10. CTA Band
   ============================================================ */
.cta-band { background: var(--dark); padding: 80px 0; text-align: center; }
.cta-band h2 { color: var(--white); margin-bottom: 12px; }
.cta-band p  { color: rgba(255,255,255,0.75); font-size: 1.05rem; margin-bottom: 36px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* 11. Footer
   ============================================================ */
.site-footer { background: var(--dark-2); color: rgba(255,255,255,0.7); padding: 72px 0 32px; }

.footer-grid { display: grid; grid-template-columns: 1fr; gap: 44px; margin-bottom: 56px; }

.footer-brand-name {
  font-size: 1.35rem; font-weight: 800; letter-spacing: -0.01em;
  color: var(--white); margin-bottom: 14px;
}
.footer-brand-name span { color: var(--blue); }
.footer-desc { font-size: 0.9rem; line-height: 1.7; max-width: 300px; }

.footer-heading {
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--white); margin-bottom: 18px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 0.9rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--blue); }

.footer-contact-list { display: flex; flex-direction: column; gap: 14px; }
.footer-contact-item { display: flex; align-items: flex-start; gap: 10px; font-size: 0.9rem; }
.footer-contact-item svg { flex-shrink: 0; color: var(--blue); margin-top: 2px; }
.footer-contact-item a:hover { color: var(--blue); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-content: space-between; align-items: center;
  font-size: 0.78rem; color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: var(--blue); }
.footer-bottom a:hover { text-decoration: underline; }

/* 12. Page Hero (inner pages)
   ============================================================ */
.page-hero {
  background: var(--dark); padding: 100px 20px 64px;
  text-align: center; color: var(--white);
  border-bottom: 3px solid var(--blue);
}
.page-hero h1 { font-size: clamp(1.8rem, 4.5vw, 2.8rem); margin-bottom: 14px; }
.page-hero p  { color: rgba(255,255,255,0.65); font-size: 1.05rem; max-width: 580px; margin: 0 auto; line-height: 1.7; }
.page-hero .eyebrow { margin-bottom: 10px; }

/* Breadcrumb */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: rgba(255,255,255,0.4);
  justify-content: center; margin-bottom: 20px;
}
.breadcrumb a { color: rgba(255,255,255,0.4); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { color: rgba(255,255,255,0.25); }

/* 13. Services Detail Page
   ============================================================ */
.services-list { display: grid; grid-template-columns: 1fr; gap: 28px; }

.service-detail-card {
  background: var(--white); border-radius: 12px;
  padding: 36px; box-shadow: var(--shadow);
  border-left: 5px solid var(--blue);
  display: grid; grid-template-columns: 1fr; gap: 20px;
  overflow: hidden;
}
.sdc-img {
  width: calc(100% + 72px);
  margin: -36px -36px 0;
  height: 220px;
  object-fit: cover;
  display: block;
}
.sdc-header { display: flex; align-items: flex-start; gap: 18px; }
.sdc-icon {
  width: 56px; height: 56px; flex-shrink: 0;
  background: var(--blue-light); border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue);
}
.sdc-header h3 { margin-bottom: 6px; font-size: 1.2rem; }
.sdc-header p  { color: var(--gray); font-size: 0.93rem; line-height: 1.65; }
.sdc-bullets { display: flex; flex-direction: column; gap: 8px; }
.bullet-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.9rem; color: var(--mid);
}
.bullet-dot {
  width: 7px; height: 7px;
  background: var(--blue); border-radius: 50%; flex-shrink: 0;
}

/* 14. About Page
   ============================================================ */
.about-story { display: grid; grid-template-columns: 1fr; gap: 48px; align-items: start; }
.about-story img { border-radius: 12px; width: 100%; object-fit: cover; height: 340px; }
.about-story h2  { margin-bottom: 20px; }
.about-story p   { color: var(--gray); line-height: 1.75; margin-bottom: 16px; }

.values-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.value-card {
  background: var(--light); border-radius: 10px; padding: 28px;
  border-top: 3px solid var(--blue);
}
.value-card h3 { margin-bottom: 10px; }
.value-card p  { color: var(--gray); font-size: 0.92rem; line-height: 1.65; }

/* 15. Gallery
   ============================================================ */
.gallery-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }

.gallery-item {
  position: relative; overflow: hidden;
  border-radius: 8px; cursor: pointer;
  aspect-ratio: 4/3; background: var(--light);
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0);
  display: flex; align-items: center; justify-content: center;
  transition: background 0.3s;
}
.gallery-item:hover .gallery-overlay { background: rgba(26,111,255,0.28); }
.gallery-overlay svg { opacity: 0; color: white; transition: opacity 0.3s; }
.gallery-item:hover .gallery-overlay svg { opacity: 1; }

/* Lightbox */
.lightbox {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.93); z-index: 200;
  align-items: center; justify-content: center; padding: 24px;
}
.lightbox.open { display: flex; }
.lightbox-img { max-width: 100%; max-height: 88vh; border-radius: 6px; object-fit: contain; }
.lightbox-close {
  position: absolute; top: 18px; right: 22px;
  background: none; border: none;
  color: rgba(255,255,255,0.7); font-size: 2.2rem;
  cursor: pointer; line-height: 1; padding: 4px;
  transition: color var(--transition);
}
.lightbox-close:hover { color: var(--white); }

.gallery-coming-soon {
  text-align: center; padding: 60px 20px;
  background: var(--light); border-radius: 12px;
  border: 2px dashed var(--border);
  color: var(--gray);
}
.gallery-coming-soon h3 { margin-bottom: 10px; color: var(--dark); }

/* 16. Contact
   ============================================================ */
.contact-layout { display: grid; grid-template-columns: 1fr; gap: 48px; }

.contact-info-card {
  background: var(--dark); border-radius: 12px; padding: 40px; color: var(--white);
}
.contact-info-card h3 { margin-bottom: 8px; }
.contact-info-card > p { color: rgba(255,255,255,0.65); margin-bottom: 32px; font-size: 0.95rem; line-height: 1.65; }

.contact-detail {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,0.08);
}
.contact-detail:last-child { border-bottom: none; }
.contact-detail-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: rgba(26,111,255,0.12); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue);
}
.contact-detail-text strong {
  display: block; font-size: 0.72rem;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: rgba(255,255,255,0.4); margin-bottom: 4px;
}
.contact-detail-text a,
.contact-detail-text span { font-size: 1rem; font-weight: 600; color: var(--white); }
.contact-detail-text a:hover { color: var(--blue); }

/* Contact form */
.contact-form-card { background: var(--light); border-radius: 12px; padding: 40px; }
.contact-form-card h3 { margin-bottom: 8px; }
.contact-form-card > p { color: var(--gray); font-size: 0.95rem; margin-bottom: 28px; }

.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 0.83rem; font-weight: 600;
  color: var(--mid); margin-bottom: 7px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 12px 16px;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  font-family: var(--font); font-size: 0.95rem;
  color: var(--dark); background: var(--white);
  transition: border-color var(--transition); outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--blue); }
.form-group textarea { height: 130px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr; gap: 16px; }
.form-disclaimer { font-size: 0.78rem; color: var(--gray); margin-top: 14px; }

/* 17. Scroll Reveal
   ============================================================ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.65s ease, transform 0.65s ease; }
.reveal.revealed { opacity: 1; transform: none; }
.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; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* 18. Utilities
   ============================================================ */
.text-orange { color: var(--blue); }
.section-dark { background: var(--dark-2); color: var(--white); }
.section-light { background: var(--light); }
.section-white { background: var(--white); }

/* 19. Responsive
   ============================================================ */
@media (max-width: 599px) {
  .hero-content { padding: 60px 20px 40px; }
  .hero-eyebrow { padding: 5px 12px; }
  .hero-eyebrow span { font-size: 0.68rem; letter-spacing: 0.06em; }
  .hero-bg { background-position: 65% center; }
}

@media (min-width: 600px) {
  .services-grid    { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid     { grid-template-columns: repeat(2, 1fr); }
  .form-row         { grid-template-columns: 1fr 1fr; }
  .why-grid         { grid-template-columns: repeat(2, 1fr); }
  .values-grid      { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .hamburger   { display: none; }
  .nav-links   { display: flex !important; flex-direction: row; align-items: center; gap: 4px; }
  .services-grid  { grid-template-columns: repeat(3, 1fr); }
  .about-split    { grid-template-columns: 1fr 1fr; }
  .about-story    { grid-template-columns: 1fr 1fr; }
  .footer-grid    { grid-template-columns: 2fr 1fr 1.4fr 1.6fr; }
  .gallery-grid   { grid-template-columns: repeat(3, 1fr); }
  .contact-layout { grid-template-columns: 5fr 7fr; }
  .services-list  { grid-template-columns: repeat(2, 1fr); }
  .values-grid    { grid-template-columns: repeat(3, 1fr); }
  .why-grid       { grid-template-columns: repeat(4, 1fr); }
}

/* Mobile nav open state */
@media (max-width: 899px) {
  .nav-links.open { display: flex; }
  .nav-links {
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--dark); border-bottom: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    flex-direction: column; padding: 8px 0; z-index: 99;
  }
  .nav-links a { padding: 12px 24px; border-radius: 0; text-align: center; }
  .nav-links .btn-nav { margin: 8px 24px 12px; border-radius: var(--radius); justify-content: center; }
}