/* ==========================================================================
   Aventra Projects — Design tokens
   Theme: "Blueprint & Concrete" — technical drawing aesthetic for a
   construction company. Navy blueprint blue + cool paper + safety amber.
   ========================================================================== */
:root{
  --ink:        #101828;
  --blueprint:  #17335A;
  --blueprint-2:#1F4372;
  --blueprint-3:#0E223E;
  --paper:      #EDF0F4;
  --paper-2:    #E2E6EC;
  --concrete:   #6B7280;
  --concrete-2: #9CA3AF;
  --amber:      #F2A93B;
  --amber-dark: #D98F1F;
  --white:      #FFFFFF;

  --font-display: 'Oswald', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius: 4px;
  --wrap: 1180px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img,svg{ display:block; max-width:100%; }
a{ color: inherit; text-decoration: none; }
h1,h2,h3{
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin: 0 0 0.5em;
  line-height: 1.1;
  font-weight: 600;
}
p{ margin: 0 0 1em; color: var(--concrete); }
.wrap{ max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* Buttons */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:focus-visible{ outline: 3px solid var(--amber); outline-offset: 2px; }
.btn-amber{ background: var(--amber); color: var(--blueprint-3); font-weight: 600; }
.btn-amber:hover{ background: var(--amber-dark); transform: translateY(-2px); }
.btn-ghost{ border-color: currentColor; color: inherit; }
.btn-ghost:hover{ background: rgba(255,255,255,0.08); transform: translateY(-2px); }

/* ============ HEADER ============ */
.site-header{
  position: sticky; top: 0; z-index: 100;
  background: rgba(23,51,90,0.96);
  backdrop-filter: blur(6px);
  color: var(--white);
  border-bottom: 1px solid rgba(242,169,59,0.25);
}
.header-inner{
  display: flex; align-items: center; gap: 24px;
  height: 72px;
}
.logo{ display: flex; align-items: center; gap: 10px; color: var(--white); margin-right: auto; }
.logo-mark{ width: 32px; height: 32px; color: var(--amber); flex-shrink:0; }
.logo-text{
  font-family: var(--font-display);
  font-size: 1.15rem; letter-spacing: 0.06em; font-weight: 600;
  display:flex; flex-direction:column; line-height:1.05;
}
.logo-sub{ font-size: 0.6rem; letter-spacing: 0.25em; color: var(--amber); font-family: var(--font-mono); font-weight:400; }
.main-nav{ display: flex; gap: 28px; }
.main-nav a{
  font-size: 0.92rem; font-weight:500; color: rgba(255,255,255,0.85);
  position: relative; padding: 4px 0;
}
.main-nav a:hover{ color: var(--amber); }
.nav-cta{ padding: 10px 20px; font-size: 0.78rem; }
.nav-toggle{ display:none; background:none; border:none; cursor:pointer; width:32px; height:24px; flex-direction:column; justify-content:space-between; padding:0; }
.nav-toggle span{ display:block; height:2px; background: var(--white); border-radius:2px; }

/* ============ HERO ============ */
.hero{
  position: relative;
  background: linear-gradient(180deg, var(--blueprint-3) 0%, var(--blueprint) 60%, var(--blueprint-2) 100%);
  color: var(--white);
  overflow: hidden;
  padding: 72px 0 40px;
}
.hero-grid{
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(242,169,59,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242,169,59,0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 85%);
}
.hero-inner{
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  padding-top: 40px;
}
.eyebrow{
  font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.08em;
  color: var(--amber); text-transform: uppercase;
  display:flex; align-items:center; gap:8px; margin-bottom: 20px;
}
.eyebrow-dot{ width:8px; height:8px; border-radius:50%; background: var(--amber); display:inline-block; }
.hero h1{ font-size: clamp(2.4rem, 5vw, 3.6rem); margin-bottom: 20px; }
.hero h1 .accent{ color: var(--amber); }
.hero-sub{ font-size: 1.05rem; color: rgba(255,255,255,0.78); max-width: 480px; margin-bottom: 32px; }
.hero-actions{ display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats{ display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin:0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.15); }
.hero-stats dt{ font-family: var(--font-display); font-size: 1.8rem; color: var(--amber); }
.hero-stats dd{ margin:0; font-size: 0.78rem; color: rgba(255,255,255,0.7); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.03em; }

.hero-visual{ position: relative; }
.blueprint-build{ width: 100%; height: auto; overflow: visible; }
.blueprint-build .draw-line{
  fill: none; stroke: var(--amber); stroke-width: 2;
  stroke-linejoin: round; stroke-linecap: round;
}
.blueprint-build .l1{ stroke-dasharray: 400; stroke-dashoffset: 400; animation: draw 1s ease forwards 0.1s; }
.blueprint-build .l2{ stroke-dasharray: 700; stroke-dashoffset: 700; animation: draw 1.1s ease forwards 0.3s; }
.blueprint-build .l3{ stroke-dasharray: 700; stroke-dashoffset: 700; animation: draw 1.1s ease forwards 0.5s; }
.blueprint-build .l4{ stroke-dasharray: 500; stroke-dashoffset: 500; animation: draw 0.9s ease forwards 0.7s; }
.blueprint-build .l6{ stroke-dasharray: 240; stroke-dashoffset: 240; animation: draw 0.8s ease forwards 0.9s; }
.blueprint-build .l7{ stroke: rgba(255,255,255,0.55); stroke-dasharray: 500; stroke-dashoffset: 500; animation: draw 1.2s ease forwards 1s; }
.blueprint-build .windows{ opacity: 0; animation: fadein 0.6s ease forwards 1.1s; }
.blueprint-build .windows rect{ fill: rgba(242,169,59,0.35); stroke: var(--amber); stroke-width: 1; }
@keyframes draw{ to{ stroke-dashoffset: 0; } }
@keyframes fadein{ to{ opacity: 1; } }

.scroll-cue{
  position: relative; display:flex; align-items:center; gap:8px;
  font-family: var(--font-mono); font-size:0.7rem; letter-spacing:0.15em; text-transform:uppercase;
  color: rgba(255,255,255,0.5); justify-content:center; padding-top: 24px;
}
.scroll-cue span{ width:1px; height:24px; background: rgba(255,255,255,0.4); display:block; animation: scrollcue 1.6s ease infinite; }
@keyframes scrollcue{ 0%,100%{ opacity:0.2; } 50%{ opacity:1; } }

/* ============ MARQUEE ============ */
.marquee-strip{
  background: var(--amber); color: var(--blueprint-3);
  overflow: hidden; white-space: nowrap; padding: 12px 0;
  font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
}
.marquee-track{ display:inline-flex; gap: 14px; animation: marquee 28s linear infinite; }
.marquee-track .dot{ opacity:0.5; }
@keyframes marquee{ from{ transform: translateX(0); } to{ transform: translateX(-50%); } }

/* ============ SECTIONS ============ */
.section{ padding: 96px 0; }
.section-dark{ background: var(--blueprint-3); color: var(--white); }
.section-dark p{ color: rgba(255,255,255,0.68); }
.section-dark h2{ color: var(--white); }
.section-eyebrow{
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--amber-dark); margin-bottom: 12px; font-weight:600;
}
.section-dark .section-eyebrow{ color: var(--amber); }
.section h2{ font-size: clamp(1.8rem, 3.4vw, 2.6rem); max-width: 760px; }
.section-lede{ max-width: 620px; font-size: 1.05rem; }

/* About */
.about-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.about-copy h2{ color: var(--blueprint-3); }
.text-link{ font-family: var(--font-mono); font-weight:600; color: var(--blueprint-3); border-bottom: 2px solid var(--amber); padding-bottom: 2px; }
.timeline{ border-left: 2px solid var(--paper-2); padding-left: 28px; display:flex; flex-direction:column; gap: 28px; }
.timeline-item{ position: relative; }
.timeline-item::before{
  content:""; position:absolute; left:-34px; top:4px; width:12px; height:12px;
  border-radius:50%; background: var(--amber); border: 3px solid var(--paper);
  box-shadow: 0 0 0 2px var(--amber);
}
.timeline-year{ font-family: var(--font-mono); font-weight:600; color: var(--blueprint); display:block; margin-bottom:4px; letter-spacing: 0.04em; }
.timeline-item p{ margin:0; }

/* Services */
.services-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 48px; }
.service-card{
  background: rgba(255,255,255,0.04); border: 1px solid rgba(242,169,59,0.2);
  border-radius: var(--radius); padding: 32px 24px; transition: transform 0.2s ease, border-color 0.2s ease;
}
.service-card:hover{ transform: translateY(-4px); border-color: var(--amber); }
.service-icon{ width: 40px; height: 40px; color: var(--amber); margin-bottom: 20px; }
.service-card h3{ color: var(--white); font-size: 1.15rem; margin-bottom: 10px; }
.service-card p{ font-size: 0.95rem; margin: 0; }

/* Portfolio */
.filter-tabs{ display:flex; gap: 10px; margin: 40px 0 32px; flex-wrap: wrap; }
.filter-btn{
  font-family: var(--font-mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em;
  padding: 10px 18px; border-radius: var(--radius); border: 1px solid var(--concrete-2);
  background: transparent; color: var(--concrete); cursor: pointer; transition: all 0.15s ease;
}
.filter-btn:hover{ border-color: var(--blueprint); color: var(--blueprint); }
.filter-btn.is-active{ background: var(--blueprint); color: var(--white); border-color: var(--blueprint); }
.portfolio-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.portfolio-card{
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--paper-2); transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: none;
}
.portfolio-card.is-visible{ display:block; animation: cardin 0.4s ease; }
@keyframes cardin{ from{ opacity:0; transform: translateY(10px);} to{ opacity:1; transform: translateY(0);} }
.portfolio-card:hover{ transform: translateY(-4px); box-shadow: 0 12px 28px rgba(16,24,40,0.1); }
.card-visual{ background: var(--blueprint-3); }
.bp-illustration{ width:100%; height:auto; }
.bp-illustration .bp-bg{ fill: var(--blueprint-3); }
.bp-illustration .bp-fine-grid path{ stroke: rgba(242,169,59,0.08); stroke-width:1; }
.bp-illustration .bp-line{ stroke: var(--amber); stroke-width: 2; fill:none; }
.bp-illustration .bp-fill{ fill: var(--amber); opacity: 0.85; }
.bp-illustration .bp-window{ fill: rgba(242,169,59,0.28); stroke: var(--amber); stroke-width: 1.5; }
.card-body{ padding: 22px 24px 26px; }
.card-tag{ font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--amber-dark); font-weight:600; }
.card-body h3{ font-size: 1.15rem; margin: 8px 0 8px; color: var(--blueprint-3); }
.card-body p{ margin:0; font-size: 0.92rem; }

/* Process */
.process-line{ margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 32px; }
.process-step{ position: relative; padding-top: 20px; border-top: 2px solid rgba(242,169,59,0.35); }
.step-no{ font-family: var(--font-mono); font-size: 0.95rem; color: var(--amber); display:block; margin-bottom: 10px; letter-spacing: 0.05em; }
.process-step h3{ color: var(--white); font-size: 1.1rem; }
.process-step p{ font-size: 0.94rem; margin: 0; }

/* Testimonials */
.testimonial-grid{ display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 44px; }
.testimonial-card{
  margin:0; background: var(--white); border-left: 3px solid var(--amber);
  border-radius: var(--radius); padding: 28px 24px; box-shadow: 0 4px 14px rgba(16,24,40,0.05);
}
.testimonial-card p{ color: var(--ink); font-size: 1rem; margin-bottom: 16px; font-style: italic; }
.testimonial-card footer{ font-family: var(--font-mono); font-size: 0.78rem; color: var(--concrete); text-transform: uppercase; letter-spacing: 0.03em; }
.testimonial-note{ margin-top: 24px; font-size: 0.82rem; font-style: italic; color: var(--concrete-2); }

/* CTA banner */
.cta-banner{ background: var(--amber); padding: 64px 0; }
.cta-banner-inner{ display:flex; align-items:center; justify-content:space-between; gap: 24px; flex-wrap: wrap; }
.cta-banner h2{ color: var(--blueprint-3); margin:0; font-size: clamp(1.4rem,2.6vw,2rem); max-width: 620px; }
.cta-banner .btn-amber{ background: var(--blueprint-3); color: var(--white); }
.cta-banner .btn-amber:hover{ background: var(--ink); }

/* Contact */
.contact-grid{ display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; }
.contact-info h2{ color: var(--blueprint-3); }
.contact-list{ list-style: none; padding:0; margin: 28px 0 0; display:flex; flex-direction:column; gap: 16px; }
.contact-list li{ display:flex; flex-direction:column; gap: 2px; border-bottom: 1px solid var(--paper-2); padding-bottom: 12px; }
.contact-list strong{ font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--amber-dark); }
.contact-list span{ color: var(--ink); font-weight: 500; }

.contact-form{ background: var(--white); border: 1px solid var(--paper-2); border-radius: var(--radius); padding: 32px; }
.form-row{ margin-bottom: 20px; display:flex; flex-direction:column; gap:6px; }
.form-row-split{ display:grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom:0; }
.form-row-split > div{ display:flex; flex-direction:column; gap:6px; margin-bottom:20px; }
label{ font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--concrete); }
input, textarea, select{
  font-family: var(--font-body); font-size: 0.95rem; padding: 12px 14px;
  border: 1px solid var(--paper-2); border-radius: var(--radius); background: var(--paper);
  color: var(--ink);
}
input:focus, textarea:focus, select:focus{ outline: 2px solid var(--amber); outline-offset: 1px; border-color: var(--amber); }
.form-submit{ width: 100%; margin-top: 8px; }
.form-note{ font-family: var(--font-mono); font-size: 0.82rem; color: var(--blueprint); margin: 12px 0 0; min-height: 1.2em; }

/* Footer */
.site-footer{ background: var(--blueprint-3); color: rgba(255,255,255,0.7); padding-top: 56px; }
.footer-inner{ display:flex; justify-content: space-between; align-items:flex-start; gap: 24px; flex-wrap: wrap; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.12); }
.footer-brand p{ max-width: 320px; font-size: 0.88rem; margin-top: 10px; }
.footer-links{ display:flex; gap: 24px; flex-wrap: wrap; }
.footer-links a{ font-size: 0.9rem; }
.footer-links a:hover{ color: var(--amber); }
.footer-bottom{ padding: 20px 24px; font-size: 0.78rem; font-family: var(--font-mono); }

/* ============ RESPONSIVE ============ */
@media (max-width: 960px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ order: -1; max-width: 420px; margin: 0 auto; }
  .about-grid, .contact-grid{ grid-template-columns: 1fr; }
  .services-grid, .portfolio-grid, .process-line, .testimonial-grid{ grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 720px){
  .main-nav, .nav-cta{ display:none; }
  .nav-toggle{ display:flex; }
  .site-header.nav-open .main-nav{
    display:flex; position:absolute; top:72px; left:0; right:0; background: var(--blueprint-3);
    flex-direction:column; padding: 20px 24px; gap: 18px; border-bottom: 1px solid rgba(242,169,59,0.25);
  }
  .site-header.nav-open .nav-cta{ display:none; }
  .hero-stats{ grid-template-columns: repeat(2,1fr); row-gap: 20px; }
  .services-grid, .portfolio-grid, .process-line, .testimonial-grid{ grid-template-columns: 1fr; }
  .form-row-split{ grid-template-columns: 1fr; }
  .cta-banner-inner{ flex-direction: column; align-items: flex-start; }
}