/* =============================================================
   portfolio.css — Zetaqube Construction Portfolio
   Matches the dark construction theme of zetaqube.com/const/
   ============================================================= */

/* ─── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@400;600;700;800&family=Barlow:wght@300;400;500;600&display=swap');

/* ─── CSS Variables (edit here to change the whole theme) ───── */
:root {
  --color-bg:         #FFFFFF;        /* Main page background          */
  --color-bg-card:    #f8f9fa;        /* Project card background        */
  --color-bg-nav:     #FFFFFF; /* Navbar background         */
  --color-bg-gallery: #023E8A;        /* Gallery strip background       */

  --color-accent:     #023E8A;        /* Orange accent (buttons, labels)*/
  --color-accent-h:   #00B4D8;        /* Hover state for accent         */
  --color-white:      #000000;
  --color-text:       #000000;        /* Body text                      */
  --color-muted:      #000000;        /* Muted / secondary text         */
  --color-border:     #2a2a2a;        /* Subtle borders                 */

  --font-display:     'Barlow Condensed', sans-serif;
  --font-body:        'Barlow', sans-serif;

  --nav-height:       70px;
  --max-width:        1200px;
  --radius:           8px;
  --transition:       0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

/* ─── NAVBAR ────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: var(--color-bg-nav);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background var(--transition);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.nav-logo img {
  height: 28px;
  width: auto;
  object-fit: contain;
}

/* Desktop nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.5px;
  transition: color var(--transition);
}

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

/* Get a Quote button */
.btn-quote {
  background: var(--color-accent);
  color: #ffffff !important;
  padding: 9px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 13px !important;
  letter-spacing: 0.5px;
  transition: background var(--transition), transform var(--transition);
}

.btn-quote:hover {
  background: var(--color-accent-h) !important;
  color: var(--color-white) !important;
  transform: translateY(-1px);
}

/* Engineering link */
.btn-engineering {
  border: 1px solid var(--color-border);
  padding: 8px 18px;
  border-radius: var(--radius);
  font-size: 13px !important;
  font-weight: 500;
  color: var(--color-muted) !important;
  transition: border-color var(--transition), color var(--transition);
}

.btn-engineering:hover {
  border-color: var(--color-accent);
  color: var(--color-accent) !important;
}

/* Hamburger menu (mobile) */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ─── HERO ──────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  margin-top: var(--nav-height);
  padding: 80px 24px 80px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.12) 0%, transparent 60%),
    url('https://zetaqube.com/const/about.jpg') center/cover no-repeat;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(255,255,255,0.92) 0%,
    rgba(255,255,255,0.70) 55%,
    rgba(11,11,11,0.40) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--color-accent);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 800;
  line-height: 1.05;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

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

.hero-sub {
  font-size: 17px;
  color: var(--color-text);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.6;
}

.btn-primary {
  display: inline-block;
  background: var(--color-accent);
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius);
  letter-spacing: 0.5px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary:hover {
  background: var(--color-accent-h);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232,93,4,0.35);
}

/* ─── PORTFOLIO SECTION ─────────────────────────────────────── */
.portfolio-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}

.section-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-white);
  letter-spacing: 1px;
  margin-bottom: 60px;
}

/* ─── PROJECT CARD ──────────────────────────────────────────── */
.project-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 60px;
  transition: border-color var(--transition);
}

.project-card:hover {
  border-color: #023E8A;
}

/* Project header bar */
.project-header {
  padding: 30px 36px 24px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.project-number {
  font-family: var(--font-display);
  font-size: 60px;
  font-weight: 800;
  color: #023E8A;
  line-height: 1;
  flex-shrink: 0;
  user-select: none;
}

.project-meta {
  flex: 1;
}

.project-name {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.project-location {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Project body (description + gallery) */
.project-body {
  padding: 32px 36px 36px;
}

.project-description {
  font-size: 15.5px;
  color: var(--color-text);
  line-height: 1.75;
  max-width: 760px;
  margin-bottom: 32px;
}

/* ─── PHOTO GALLERY ─────────────────────────────────────────── */
.gallery-label {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--color-muted);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

.gallery-thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 6px;
  cursor: pointer;
  background: var(--color-bg-gallery);
}

.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease, filter 0.3s ease;
  filter: brightness(0.85);
}

.gallery-thumb:hover img {
  transform: scale(1.06);
  filter: brightness(1);
}

/* Zoom icon overlay on hover */
.gallery-thumb::after {
  content: '⤢';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--color-white);
  background: rgba(232,93,4,0.55);
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-thumb:hover::after {
  opacity: 1;
}

/* ─── DIVIDER ────────────────────────────────────────────────── */
.project-divider {
  height: 1px;
  background: linear-gradient(to right, var(--color-accent), transparent);
  margin: 8px 0 52px;
  opacity: 0.3;
}

/* ─── CTA STRIP ─────────────────────────────────────────────── */
.cta-strip {
  background: #FFFFFF;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 70px 24px;
  text-align: center;
}

.cta-inner {
  max-width: 600px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 14px;
  letter-spacing: 1px;
}

.cta-inner p {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 30px;
}

/* ─── FOOTER ─────────────────────────────────────────────────── */
.footer {
  background: #023E8A;
  padding: 60px 24px 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand img {
  height: 80px;
  width: auto;
  margin-bottom: 14px;
  opacity: 0.85;
}

.footer-brand p {
  font-size: 14px;
  color: #ffffff;
  max-width: 260px;
  line-height: 1.6;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: #ffffff;
  margin-bottom: 10px;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-muted);
}

/* ─── LIGHTBOX ───────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.93);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox.active {
  opacity: 1;
  pointer-events: all;
}

.lb-img-wrap {
  max-width: 90vw;
  max-height: 85vh;
  text-align: center;
}

#lb-img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.8);
}

.lb-caption {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-muted);
  letter-spacing: 0.5px;
}

.lb-close,
.lb-prev,
.lb-next {
  position: absolute;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--color-white);
  cursor: pointer;
  transition: background var(--transition);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lb-close:hover,
.lb-prev:hover,
.lb-next:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.lb-close {
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  font-size: 24px;
  line-height: 1;
}

.lb-prev,
.lb-next {
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  font-size: 30px;
}

.lb-prev { left: 20px; }
.lb-next { right: 20px; }

/* ─── RESPONSIVE ─────────────────────────────────────────────── */

/* Tablet */
@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: span 2;
  }

  .project-header {
    padding: 24px 24px 20px;
  }

  .project-body {
    padding: 24px 24px 28px;
  }
}

/* Mobile */
@media (max-width: 640px) {
  /* Show hamburger, hide desktop nav */
  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    background: #0b0b0b;
    padding: 20px 24px 28px;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
  }

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

  .nav-links a {
    padding: 13px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 15px;
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .btn-quote,
  .btn-engineering {
    margin-top: 8px;
    text-align: center;
    border-radius: var(--radius);
    padding: 12px 20px;
  }

  /* Hero */
  .hero {
    padding: 60px 20px 60px;
    min-height: 380px;
  }

  /* Project cards */
  .project-header {
    flex-direction: column;
    padding: 20px 20px 16px;
    gap: 8px;
  }

  .project-number {
    font-size: 42px;
  }

  .project-body {
    padding: 20px 20px 24px;
  }

  /* Gallery — 2 columns on small screens */
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: span 1;
  }

  /* Lightbox arrows */
  .lb-prev { left: 8px; }
  .lb-next { right: 8px; }
}

/* Very small screens — single column gallery */
@media (max-width: 380px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}