/* =========================================================
   BIMSPACE — Landing styles
   Modern minimalist · engineering · BIM
   ========================================================= */

:root {
  --bg: #F6F5F1;
  --bg-soft: #EFEDE6;
  --bg-dark: #0B1220;
  --bg-dark-2: #111A2C;
  --ink: #0B1220;
  --ink-2: #1A2332;
  --muted: #5C6473;
  --line: #DCD9CF;
  --line-dark: #1F2A3D;
  --accent: #1E5EFF;
  --accent-2: #4D82FF;
  --accent-soft: #E8EFFF;
  --white: #FFFFFF;

  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1240px;
  --shadow-sm: 0 1px 2px rgba(11,18,32,.04), 0 2px 8px rgba(11,18,32,.04);
  --shadow-md: 0 8px 24px rgba(11,18,32,.08);

  --ff-sans: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ff-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;

  --t-fast: 180ms cubic-bezier(.4,0,.2,1);
  --t-med: 320ms cubic-bezier(.4,0,.2,1);
}

/* ----------- Reset / Base ----------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--ff-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: 0; color: inherit; }
input, textarea, select { font: inherit; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

/* ----------- Buttons ----------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  transition: transform var(--t-fast), background-color var(--t-fast), color var(--t-fast), box-shadow var(--t-fast);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent); color: var(--white); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: rgba(11,18,32,.18);
}
.btn-ghost:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn-block { width: 100%; justify-content: center; }

/* ----------- Header ----------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246,245,241,.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast), background-color var(--t-fast);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(246,245,241,.95);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 18px;
  color: var(--ink);
}
.logo-mark { width: 26px; height: 26px; color: var(--accent); }
.logo-accent { color: var(--accent); }

.nav {
  display: flex;
  gap: 30px;
  align-items: center;
}
.nav a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding: 6px 0;
  transition: color var(--t-fast);
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-med);
}
.nav a:hover { color: var(--accent); }
.nav a:hover::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.lang-switch {
  font-family: var(--ff-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
  padding: 6px 0;
  display: flex;
  gap: 4px;
}
.lang-switch .lang-active { color: var(--ink); font-weight: 600; }
.lang-switch .lang-divider { color: var(--line); }
.lang-switch:hover { color: var(--accent); }

.burger {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.burger.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ----------- Hero ----------- */
.hero {
  position: relative;
  padding: 100px 0 120px;
  overflow: hidden;
}
.hero-pipes {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 75%);
  pointer-events: none;
  opacity: 0.18;
}
.hero-blueprint {
  position: absolute;
  right: -80px;
  top: 60px;
  width: 580px;
  height: 580px;
  color: var(--accent);
  opacity: 0.18;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: 900px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ff-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 14px 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.5);
}
.hero-tag .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(30,94,255,.2);
}
.hero-title {
  font-size: clamp(44px, 7.5vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
  margin: 28px 0 24px;
}
.hero-title-accent {
  font-style: italic;
  font-weight: 500;
  color: var(--accent);
}
.hero-sub {
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--muted);
  max-width: 620px;
  line-height: 1.55;
  margin: 0 0 36px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ----------- Marquee ----------- */
.marquee {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
  overflow: hidden;
  padding: 18px 0;
}
.marquee-track {
  display: flex;
  gap: 28px;
  animation: marquee 38s linear infinite;
  font-family: var(--ff-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  white-space: nowrap;
}
.marquee-track span { flex-shrink: 0; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ----------- Sections ----------- */
.section { padding: 120px 0; }
.section-soft { background: var(--bg-soft); }
.section-dark {
  background: var(--bg-dark);
  color: #DDE2EC;
}
.section-dark .section-title,
.section-dark h3 { color: #F5F6F8; }
.section-dark .eyebrow { color: rgba(255,255,255,.55); }
.section-dark .eyebrow-num { color: var(--accent); }
.section-dark .section-lead { color: rgba(255,255,255,.7); }

.section-head { margin-bottom: 64px; max-width: 760px; }
.section-head-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: end;
  max-width: none;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--ff-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 18px;
}
.eyebrow-num {
  color: var(--accent);
  font-weight: 600;
}
.section-title {
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin: 0 0 20px;
  color: var(--ink);
}
.section-lead {
  font-size: 17px;
  color: var(--muted);
  max-width: 520px;
  margin: 0;
}

/* ----------- About ----------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.about-content p {
  font-size: 17px;
  line-height: 1.65;
  margin: 0 0 18px;
  color: var(--ink-2);
}
.checklist {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  display: grid;
  gap: 12px;
}
.checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 15.5px;
  color: var(--ink-2);
}
.checklist li::before {
  content: '';
  position: absolute;
  left: 0; top: 8px;
  width: 18px; height: 8px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

/* ----------- Services ----------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
}
.service-card {
  background: var(--bg-dark);
  padding: 40px 32px 36px;
  position: relative;
  transition: background-color var(--t-med);
  cursor: default;
}
.service-card:hover { background: var(--bg-dark-2); }
.service-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 28px;
  color: var(--accent);
}
.service-icon svg { width: 100%; height: 100%; }
.service-card h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}
.service-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: rgba(255,255,255,.65);
}
.service-arrow {
  position: absolute;
  bottom: 24px;
  right: 28px;
  font-size: 22px;
  color: rgba(255,255,255,.35);
  transition: color var(--t-fast), transform var(--t-fast);
}
.service-card:hover .service-arrow { color: var(--accent); transform: translateX(4px); }

.link-arrow {
  align-self: end;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 4px;
  transition: color var(--t-fast), border-color var(--t-fast);
  white-space: nowrap;
}
.link-arrow:hover { color: var(--accent); border-color: var(--accent); }

/* ----------- Process ----------- */
.process {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}
.process-step {
  padding: 32px 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  position: relative;
  transition: transform var(--t-med), box-shadow var(--t-med), border-color var(--t-med);
}
.process-step:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}
.process-num {
  font-family: var(--ff-mono);
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 32px;
  font-weight: 500;
  letter-spacing: 0.05em;
}
.process-step h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
  color: var(--ink);
}
.process-step p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.55;
}

/* ----------- Why Us ----------- */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}
.why-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px 32px;
}
.why-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: start;
}
.why-num {
  font-family: var(--ff-mono);
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  padding-top: 4px;
  border-top: 2px solid var(--accent);
  min-width: 28px;
}
.why-item h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--ink);
}
.why-item p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.55;
}

/* ----------- Image Carousel (infinite, pause on hover) ----------- */
.carousel {
  overflow: hidden;
  position: relative;
  padding: 8px 0;
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 6%, #000 94%, transparent 100%);
          mask-image: linear-gradient(to right, transparent 0, #000 6%, #000 94%, transparent 100%);
}
.carousel-track {
  display: flex;
  gap: 22px;
  width: max-content;
  animation: carousel-slide 60s linear infinite;
  will-change: transform;
}
.carousel:hover .carousel-track,
.carousel:focus-within .carousel-track {
  animation-play-state: paused;
}
.carousel-item {
  flex: 0 0 auto;
  width: 420px;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-dark);
  position: relative;
  transition: transform var(--t-med);
}
.carousel-item:hover { transform: scale(1.02); }
.carousel-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.8s cubic-bezier(.4,0,.2,1);
}
.carousel-item:hover img { transform: scale(1.04); }
@keyframes carousel-slide {
  from { transform: translateX(0); }
  to   { transform: translateX(calc(-50% - 11px)); } /* 11 = half of 22px gap */
}

/* ----------- Blog ----------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--t-med), box-shadow var(--t-med), border-color var(--t-med);
}
.blog-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}
.blog-cover {
  aspect-ratio: 16 / 10;
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}
.blog-cover svg { width: 100%; height: 100%; }
.blog-body {
  padding: 24px 24px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.blog-meta-row {
  display: flex;
  gap: 14px;
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}
.blog-meta-row .blog-cat { color: var(--accent); font-weight: 600; }
.blog-card h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.35;
  margin: 0 0 10px;
  color: var(--ink);
}
.blog-card p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.55;
  margin: 0 0 18px;
  flex: 1;
}
.blog-read {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--t-fast);
}
.blog-card:hover .blog-read { gap: 10px; }

/* ----------- Contact ----------- */
.section-contact { padding-bottom: 100px; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact-info .section-title { margin-bottom: 16px; }
.contact-info .section-lead { color: rgba(255,255,255,.7); margin-bottom: 40px; }

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0 0 36px;
  display: grid;
  gap: 22px;
}
.contact-list li {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 20px;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-dark);
  font-size: 16px;
}
.contact-label {
  font-family: var(--ff-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,.45);
}
.contact-list a { color: #fff; transition: color var(--t-fast); }
.contact-list a:hover { color: var(--accent); }

.socials { display: flex; gap: 12px; }
.socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.7);
  transition: all var(--t-fast);
}
.socials a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

/* Form */
.contact-form {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 36px 32px;
}
.contact-form h3 {
  margin: 0 0 24px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: #fff;
}
.field { display: grid; gap: 8px; margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,.55);
}
.field input,
.field select,
.field textarea {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-sm);
  padding: 13px 14px;
  color: #fff;
  font-size: 15px;
  transition: border-color var(--t-fast), background-color var(--t-fast);
}
.field input::placeholder,
.field textarea::placeholder { color: rgba(255,255,255,.35); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255,255,255,.08);
}
.field textarea { resize: vertical; min-height: 96px; }
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%23ffffff80' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 36px; }

.checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: rgba(255,255,255,.7);
  margin: 8px 0 22px;
  cursor: pointer;
  line-height: 1.45;
}
.checkbox input { margin-top: 3px; accent-color: var(--accent); }

.form-note {
  margin: 14px 0 0;
  font-size: 13px;
  color: rgba(255,255,255,.5);
  text-align: center;
}
.form-success {
  margin-top: 20px;
  padding: 14px 16px;
  background: rgba(30,94,255,.12);
  border: 1px solid rgba(30,94,255,.4);
  border-radius: var(--radius-sm);
  color: #C8DAFF;
  font-size: 14.5px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.form-success strong { color: #fff; }

/* ----------- Footer ----------- */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.7);
  padding: 70px 0 30px;
  border-top: 1px solid var(--line-dark);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 60px;
  padding-bottom: 50px;
  border-bottom: 1px solid var(--line-dark);
}
.footer-brand .logo { color: #fff; margin-bottom: 18px; }
.footer-brand p { font-size: 14.5px; color: rgba(255,255,255,.55); max-width: 320px; line-height: 1.55; }
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-cols h4 {
  font-size: 13px;
  font-family: var(--ff-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.45);
  margin: 0 0 18px;
  font-weight: 500;
}
.footer-cols a, .footer-cols span {
  display: block;
  font-size: 14.5px;
  color: rgba(255,255,255,.7);
  padding: 5px 0;
  transition: color var(--t-fast);
}
.footer-cols a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}

/* ----------- Reveal animation ----------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 700ms cubic-bezier(.4,0,.2,1), transform 700ms cubic-bezier(.4,0,.2,1);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ----------- Responsive ----------- */
@media (max-width: 1024px) {
  .section { padding: 88px 0; }
  .hero { padding: 70px 0 80px; }
  .about-grid, .why-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .section-head-row { grid-template-columns: 1fr; gap: 24px; align-items: start; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .blog-grid { grid-template-columns: 1fr 1fr; }
  .carousel-item { width: 320px; }
  .footer-inner { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 720px) {
  .container { padding: 0 20px; }
  .nav { display: none; }
  .nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--bg);
    padding: 24px 28px 28px;
    gap: 18px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
  }
  .nav.is-open a { font-size: 18px; padding: 8px 0; }
  .burger { display: flex; }
  .header-actions .btn { display: none; }
  .hero-blueprint { width: 380px; height: 380px; right: -120px; top: 30px; opacity: 0.12; }
  .services-grid { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .why-list { grid-template-columns: 1fr; gap: 28px; }
  .blog-grid { grid-template-columns: 1fr; }
  .carousel-item { width: 260px; }
  .carousel-track { gap: 14px; }
  .field-row { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 6px; text-align: center; }
  .contact-list li { grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .marquee-track { animation: none; }
}