/* ============================================================
   Alta Systems — Custom Audio Video Installation
   Austin, TX
   ============================================================ */

:root{
  --bg: #0b0d10;
  --bg-alt: #12151b;
  --surface: #171b22;
  --surface-2: #1e232c;
  --border: #262c36;
  --text: #edf0f3;
  --text-muted: #98a2b0;
  --accent: #3862ae;      /* Alta Systems brand blue */
  --accent-soft: #7fa8e0;
  --accent-2: #4fb8d6;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 20px 60px -20px rgba(0,0,0,0.6);
  --maxw: 1180px;
  --nav-h: 76px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4{
  font-family: "Manrope", "Inter", sans-serif;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}
p{ margin: 0 0 1em; color: var(--text-muted); }
a{ color: inherit; text-decoration: none; }
img{ max-width:100%; display:block; }
ul{ margin:0; padding:0; list-style:none; }
.container{ max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:"Manrope",sans-serif; font-weight:700; font-size: .72rem;
  letter-spacing: .16em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 14px;
}
.eyebrow::before{ content:""; width:22px; height:2px; background: var(--accent); display:inline-block; }

section{ padding: 88px 0; }
.section-head{ max-width: 640px; margin: 0 0 48px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.section-head h2{ font-size: clamp(1.7rem, 3vw, 2.4rem); }

/* Buttons */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding: 14px 26px; border-radius: 999px; font-weight:700; font-size:.95rem;
  font-family:"Manrope",sans-serif; cursor:pointer; border:1px solid transparent;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease;
  white-space:nowrap;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{ background: linear-gradient(135deg, #4d80cf, #2b4d8e); color:#fff; }
.btn-primary:hover{ box-shadow: 0 10px 30px -8px rgba(56,98,174,.55); }
.btn-outline{ background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover{ border-color: var(--accent); color: var(--accent-soft); }
.btn-block{ width:100%; }

/* ---------------- Header / Nav ---------------- */
header.site-header{
  position: sticky; top:0; z-index: 100;
  height: var(--nav-h);
  display:flex; align-items:center;
  background: rgba(11,13,16,.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-row{ display:flex; align-items:center; justify-content:space-between; width:100%; }
.logo{ display:flex; align-items:center; gap:10px; }
.logo img{ height: 42px; width:auto; display:block; }

nav.main-nav ul{ display:flex; gap:34px; }
nav.main-nav a{
  font-family:"Manrope",sans-serif; font-weight:600; font-size:.92rem; color: var(--text-muted);
  transition: color .2s ease; position:relative;
}
nav.main-nav a:hover, nav.main-nav a.active{ color: var(--text); }
nav.main-nav a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:-20px; height:2px; background: var(--accent);
}
.nav-actions{ display:flex; align-items:center; gap:18px; }
.nav-actions .btn{ padding:11px 20px; font-size:.88rem; }

.hamburger{ display:none; width:38px; height:38px; border-radius:8px; border:1px solid var(--border); background:transparent; cursor:pointer; position:relative; padding:0; }
.hamburger span{
  position:absolute; left:9px; right:9px; height:2px; background: var(--text);
  transition: transform .2s ease, opacity .2s ease;
}
.hamburger span:nth-child(1){ top:13px; }
.hamburger span:nth-child(2){ top:18px; }
.hamburger span:nth-child(3){ top:23px; }
.hamburger.open span:nth-child(1){ transform: translateY(5px) rotate(45deg); }
.hamburger.open span:nth-child(2){ opacity:0; }
.hamburger.open span:nth-child(3){ transform: translateY(-5px) rotate(-45deg); }

.mobile-nav{ display:none; }

/* ---------------- Hero ---------------- */
.hero{
  position:relative; overflow:hidden;
  padding: 120px 0 100px;
  background:
    radial-gradient(700px 420px at 82% -10%, rgba(56,98,174,.16), transparent 60%),
    radial-gradient(600px 400px at 0% 110%, rgba(79,184,214,.10), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.hero-grid{ display:grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items:center; }
.hero h1{ font-size: clamp(2.2rem, 4.4vw, 3.4rem); }
.hero h1 .accent{ background: linear-gradient(135deg, var(--accent-soft), var(--accent)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.hero p.lead{ font-size:1.08rem; max-width: 520px; }
.hero-ctas{ display:flex; gap:14px; margin-top: 30px; flex-wrap:wrap; }

.hero-visual{
  position:relative; aspect-ratio: 4/3.1; border-radius: 20px; overflow:hidden;
  background: linear-gradient(160deg, var(--surface-2), var(--bg-alt));
  border:1px solid var(--border); box-shadow: var(--shadow);
}
.hero-visual .rings{ position:absolute; inset:0; }
.hero-visual .rings span{
  position:absolute; border-radius:50%; border:1px solid rgba(56,98,174,.35);
}
.hero-visual .rings span:nth-child(1){ width:60%; height:60%; top:20%; left:20%; }
.hero-visual .rings span:nth-child(2){ width:85%; height:85%; top:7.5%; left:7.5%; border-color: rgba(79,184,214,.22); }
.hero-visual .rings span:nth-child(3){ width:35%; height:35%; top:32.5%; left:32.5%; border-color: rgba(56,98,174,.55); }
.hero-visual .glow-dot{
  position:absolute; top:50%; left:50%; width:14px; height:14px; margin:-7px;
  border-radius:50%; background: var(--accent); box-shadow: 0 0 40px 10px rgba(56,98,174,.55);
}
.hero-visual .bars{ position:absolute; left:8%; right:8%; bottom:9%; display:flex; align-items:flex-end; gap:6px; height:26%; }
.hero-visual .bars i{ flex:1; background: linear-gradient(180deg, var(--accent-2), transparent); border-radius:3px 3px 0 0; opacity:.55; }

/* Brand logo strip */
.brand-strip{ display:flex; flex-wrap:wrap; gap:18px; justify-content:center; align-items:center; }
.brand-logo{
  background:#fdfdfd; border-radius:12px; padding:14px 28px; height:92px; width:170px;
  display:flex; align-items:center; justify-content:center; transition: transform .2s ease;
}
.brand-logo:hover{ transform: translateY(-3px); }
.brand-logo img{ max-height:60px; max-width:100%; object-fit:contain; }

.trust-bar{ border-bottom: 1px solid var(--border); background: var(--bg-alt); }
.trust-list{ display:flex; flex-wrap:wrap; gap:36px; padding: 26px 0; justify-content:space-between; }
.trust-list li{ display:flex; align-items:center; gap:10px; font-family:"Manrope",sans-serif; font-weight:600; font-size:.9rem; color: var(--text-muted); }
.trust-list li svg{ flex:none; color: var(--accent); }

/* ---------------- Cards / Grids ---------------- */
.grid{ display:grid; gap: 26px; }
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }
.grid-2{ grid-template-columns: repeat(2, 1fr); }

.card{
  background: var(--surface); border:1px solid var(--border); border-radius: var(--radius);
  padding: 30px; transition: transform .2s ease, border-color .2s ease;
}
.card:hover{ transform: translateY(-4px); border-color: rgba(56,98,174,.4); }
.card .icon{
  width:48px; height:48px; border-radius:12px; margin-bottom:18px;
  display:flex; align-items:center; justify-content:center;
  background: linear-gradient(135deg, rgba(56,98,174,.18), rgba(79,184,214,.10));
  color: var(--accent-soft);
}
.card h3{ font-size:1.08rem; margin-bottom:8px; }
.card p{ margin:0; font-size:.94rem; }
.card a.more{ display:inline-flex; align-items:center; gap:6px; margin-top:14px; font-family:"Manrope",sans-serif; font-weight:700; font-size:.85rem; color: var(--accent-soft); }

.section-alt{ background: var(--bg-alt); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }

/* Process steps */
.steps{ counter-reset: step; }
.step{ display:flex; gap:20px; padding: 22px 0; border-top:1px solid var(--border); }
.step:last-child{ border-bottom:1px solid var(--border); }
.step .num{
  counter-increment: step; flex:none; width:44px; height:44px; border-radius:50%;
  border:1px solid var(--border); display:flex; align-items:center; justify-content:center;
  font-family:"Manrope",sans-serif; font-weight:800; color: var(--accent-soft);
}
.step h4{ margin:0 0 4px; font-size:1.02rem; }
.step p{ margin:0; font-size:.93rem; }

/* Portfolio */
.portfolio-item{
  border-radius: var(--radius); overflow:hidden; border:1px solid var(--border); background: var(--surface);
}
.portfolio-thumb{
  aspect-ratio: 16/10; position:relative; overflow:hidden;
  display:flex; align-items:center; justify-content:center; text-align:center; padding:20px;
}
.portfolio-thumb img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.portfolio-thumb::before{ content:""; position:absolute; inset:0; opacity:.9; }
.portfolio-thumb .label{ position:relative; font-family:"Manrope",sans-serif; font-weight:700; font-size:.85rem; color: rgba(237,240,243,.75); }
.pt-1::before{ background: radial-gradient(120% 130% at 20% 10%, rgba(56,98,174,.35), transparent 55%), linear-gradient(160deg, #1b1f27, #0e1116); }
.pt-2::before{ background: radial-gradient(120% 130% at 80% 20%, rgba(79,184,214,.30), transparent 55%), linear-gradient(160deg, #171b22, #0b0d10); }
.pt-3::before{ background: radial-gradient(120% 130% at 30% 90%, rgba(56,98,174,.28), transparent 55%), linear-gradient(160deg, #1b1f27, #0e1116); }
.pt-4::before{ background: radial-gradient(120% 130% at 70% 90%, rgba(79,184,214,.24), transparent 55%), linear-gradient(160deg, #171b22, #0b0d10); }
.pt-5::before{ background: radial-gradient(120% 130% at 15% 70%, rgba(56,98,174,.30), transparent 55%), linear-gradient(160deg, #1b1f27, #0e1116); }
.pt-6::before{ background: radial-gradient(120% 130% at 85% 60%, rgba(79,184,214,.28), transparent 55%), linear-gradient(160deg, #171b22, #0b0d10); }
.portfolio-body{ padding: 18px 20px 22px; }
.portfolio-body h3{ font-size:1rem; margin-bottom:4px; }
.portfolio-body p{ font-size:.86rem; margin:0; }
.tag{ display:inline-block; font-size:.7rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color: var(--accent-soft); background: rgba(56,98,174,.12); padding:4px 10px; border-radius:999px; margin-bottom:10px; }

.placeholder-note{
  border:1px dashed var(--border); border-radius: var(--radius); padding: 18px 22px; font-size:.88rem; color: var(--text-muted); background: rgba(56,98,174,.05);
}
.placeholder-note strong{ color: var(--accent-soft); }

/* Testimonials (placeholder) */
.testimonial{ border-left: 3px solid var(--accent); padding-left:20px; }
.testimonial p{ font-style: italic; font-size:1.05rem; color: var(--text); }
.testimonial .who{ font-family:"Manrope",sans-serif; font-weight:700; font-size:.85rem; color: var(--text-muted); }

/* CTA band */
.cta-band{
  border-radius: 20px; padding: 56px; text-align:center;
  background: linear-gradient(135deg, rgba(56,98,174,.14), rgba(79,184,214,.08)), var(--surface);
  border:1px solid var(--border);
}
.cta-band h2{ font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom:10px; }
.cta-band .btn-group{ display:flex; gap:14px; justify-content:center; margin-top: 24px; flex-wrap:wrap; }

/* Forms */
.form-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .full{ grid-column: 1 / -1; }
label{ display:block; font-family:"Manrope",sans-serif; font-weight:600; font-size:.85rem; margin-bottom:7px; color: var(--text-muted); }
input, select, textarea{
  width:100%; background: var(--bg-alt); border:1px solid var(--border); color: var(--text);
  border-radius: var(--radius-sm); padding: 13px 14px; font-family: inherit; font-size:.95rem;
}
input:focus, select:focus, textarea:focus{ outline:none; border-color: var(--accent); }
textarea{ resize: vertical; min-height: 120px; }

.contact-grid{ display:grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items:start; }
.info-item{ display:flex; gap:16px; padding: 18px 0; border-top:1px solid var(--border); }
.info-item:first-child{ border-top:none; }
.info-item .icon{ flex:none; width:42px; height:42px; border-radius:10px; background: rgba(56,98,174,.12); display:flex; align-items:center; justify-content:center; color: var(--accent-soft); }
.info-item h4{ margin:0 0 3px; font-size:.95rem; }
.info-item p{ margin:0; font-size:.9rem; }

/* Footer */
footer.site-footer{ border-top:1px solid var(--border); padding: 60px 0 30px; background: var(--bg-alt); }
.footer-grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand img{ height:40px; width:auto; margin-bottom:16px; }
.footer-grid h5{ font-family:"Manrope",sans-serif; font-size:.82rem; letter-spacing:.08em; text-transform:uppercase; color: var(--text); margin: 0 0 16px; }
.footer-grid li{ margin-bottom: 10px; }
.footer-grid a{ color: var(--text-muted); font-size:.92rem; transition: color .2s ease; }
.footer-grid a:hover{ color: var(--accent-soft); }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; padding-top: 24px; border-top:1px solid var(--border); font-size:.82rem; color: var(--text-muted); flex-wrap:wrap; gap:10px; }
.social-row{ display:flex; gap:10px; }
.social-row a{ width:36px; height:36px; border-radius:50%; border:1px solid var(--border); display:flex; align-items:center; justify-content:center; }
.social-row a:hover{ border-color: var(--accent); color: var(--accent-soft); }

/* Page hero (inner pages) */
.page-hero{ padding: 64px 0 56px; border-bottom:1px solid var(--border); background: linear-gradient(180deg, var(--bg-alt), var(--bg)); }
.page-hero h1{ font-size: clamp(1.9rem, 3.4vw, 2.6rem); }
.breadcrumb{ font-size:.85rem; color: var(--text-muted); margin-bottom: 14px; }
.breadcrumb a{ color: var(--accent-soft); }

/* Utilities */
.mt-0{ margin-top:0; } .mb-0{ margin-bottom:0; }
.text-center{ text-align:center; }
.stack{ display:flex; flex-direction:column; gap:10px; }

/* ---------------- Responsive ---------------- */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-visual{ order:-1; max-width: 460px; margin: 0 auto; }
  .grid-4{ grid-template-columns: repeat(2, 1fr); }
  .grid-3{ grid-template-columns: repeat(2, 1fr); }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }
}
@media (max-width: 760px){
  nav.main-nav{ display:none; }
  .nav-actions .btn-outline{ display:none; }
  .hamburger{ display:inline-block; }
  .mobile-nav{
    display:none; position:fixed; inset: var(--nav-h) 0 0 0; background: var(--bg); z-index:99;
    padding: 30px 24px; overflow-y:auto;
  }
  .mobile-nav.open{ display:block; }
  .mobile-nav ul{ display:flex; flex-direction:column; gap:6px; }
  .mobile-nav a{ display:block; padding:14px 4px; font-family:"Manrope",sans-serif; font-weight:700; font-size:1.1rem; border-bottom:1px solid var(--border); }
  .mobile-nav .btn{ margin-top: 24px; }
  .grid-3, .grid-4, .grid-2{ grid-template-columns: 1fr; }
  .form-grid{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; gap:28px; }
  .trust-list{ justify-content:flex-start; gap:22px; }
  section{ padding: 60px 0; }
  .cta-band{ padding: 36px 22px; }
}