/* Titan Shield Roofing — Styling */
:root {
  --copper-primary: #EA580C;
  --copper-hover: #C2410C;
  --amber-accent: #F59E0B;
  --bg-dark: #0B0F19;
  --bg-surface: #131A2B;
  --border-dark: #1E293B;
  --text-pure: #F8FAFC;
  --text-muted: #94A3B8;
  --font-main: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'Space Grotesk', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-main);
  background: var(--bg-dark);
  color: var(--text-pure);
  line-height: 1.6;
}

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }

/* Concept Bar */
.demo-badge-bar { background: #000; color: #fff; font-size: 0.8rem; padding: 8px 0; border-bottom: 1px solid var(--border-dark); }
.demo-badge-inner { max-width: 1180px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: space-between; align-items: center; }
.back-to-onlidesk { color: var(--amber-accent); font-weight: 600; text-decoration: none; }

/* Header */
.header { background: rgba(11, 15, 25, 0.95); border-bottom: 1px solid var(--border-dark); position: sticky; top: 0; z-index: 50; backdrop-filter: blur(10px); }
.header-wrap { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-shield { font-size: 28px; color: var(--copper-primary); }
.b-main { font-size: 1.3rem; font-weight: 800; display: block; line-height: 1.1; letter-spacing: -0.5px; }
.b-sub { font-size: 0.65rem; letter-spacing: 2px; color: var(--copper-primary); font-weight: 700; }
.nav { display: flex; align-items: center; gap: 24px; }
.nav a { color: var(--text-muted); text-decoration: none; font-size: 0.92rem; font-weight: 600; }
.nav a:hover { color: #fff; }
.btn-quote { background: var(--copper-primary); color: #fff !important; padding: 8px 18px; border-radius: 6px; font-weight: 700; }

/* Buttons */
.btn { display: inline-block; padding: 14px 28px; border-radius: 6px; font-weight: 700; text-decoration: none; cursor: pointer; border: none; font-size: 0.95rem; transition: all 0.2s; }
.btn-amber { background: var(--copper-primary); color: #fff; box-shadow: 0 4px 20px rgba(234, 88, 12, 0.35); }
.btn-amber:hover { background: var(--copper-hover); transform: translateY(-2px); }
.btn-outline { background: transparent; border: 1px solid var(--border-dark); color: #fff; }
.btn-outline:hover { border-color: var(--copper-primary); }
.btn-block { width: 100%; text-align: center; }

/* Hero */
.hero { padding: 90px 0; background: radial-gradient(circle at 70% 30%, rgba(234, 88, 12, 0.12) 0%, var(--bg-dark) 70%); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero-tag { background: rgba(234, 88, 12, 0.15); color: #FB923C; border: 1px solid rgba(234, 88, 12, 0.3); padding: 6px 14px; border-radius: 20px; font-size: 0.82rem; font-weight: 700; display: inline-block; margin-bottom: 20px; }
.hero h1 { font-size: clamp(2.3rem, 4vw, 3.4rem); font-weight: 800; line-height: 1.15; margin-bottom: 20px; letter-spacing: -0.02em; }
.hero p { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 30px; }
.hero-cta-btns { display: flex; gap: 16px; margin-bottom: 36px; flex-wrap: wrap; }
.cert-row { display: flex; gap: 20px; font-size: 0.88rem; color: #CBD5E1; font-weight: 600; flex-wrap: wrap; }

/* Quick Calc Card */
.hero-calc-card { background: var(--bg-surface); border: 1px solid var(--border-dark); border-radius: 16px; padding: 32px; box-shadow: 0 20px 40px rgba(0,0,0,0.5); }
.hero-calc-card h3 { font-size: 1.35rem; margin-bottom: 6px; }
.hero-calc-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 20px; }
.calc-form label { display: block; font-size: 0.85rem; font-weight: 700; margin-bottom: 8px; color: #CBD5E1; }
#sqft-slider { width: 100%; accent-color: var(--copper-primary); cursor: pointer; }
.slider-val-display { font-size: 1.05rem; margin-top: 6px; color: var(--amber-accent); }
.material-pills { display: flex; gap: 8px; margin-top: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.mat-pill { background: rgba(255,255,255,0.05); border: 1px solid var(--border-dark); color: var(--text-muted); padding: 8px 12px; border-radius: 6px; font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: all 0.2s; }
.mat-pill.active { background: var(--copper-primary); color: #fff; border-color: var(--copper-primary); }
.estimate-result-box { background: #0B0F19; border: 1px solid var(--border-dark); padding: 20px; border-radius: 10px; text-align: center; }
.est-label { font-size: 0.8rem; text-transform: uppercase; color: var(--text-muted); letter-spacing: 1px; }
.est-price { font-family: var(--font-mono); font-size: 2.5rem; font-weight: 800; color: #FB923C; margin: 4px 0; }
.est-sub { font-size: 0.78rem; color: #64748B; }

/* Systems */
.systems-section { padding: 90px 0; background: #0E1320; border-top: 1px solid var(--border-dark); }
.sec-head { max-width: 600px; margin: 0 auto 50px auto; }
.amber-sub { font-size: 0.82rem; font-weight: 800; color: var(--copper-primary); letter-spacing: 2px; display: block; margin-bottom: 8px; }
.sec-head h2 { font-size: 2.2rem; font-weight: 800; }
.systems-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.system-card { background: var(--bg-surface); border: 1px solid var(--border-dark); padding: 32px 24px; border-radius: 12px; }
.sys-icon { font-size: 32px; margin-bottom: 14px; }
.system-card h3 { font-size: 1.25rem; margin-bottom: 10px; }
.system-card p { font-size: 0.92rem; color: var(--text-muted); }

/* Drone Section */
.drone-section { padding: 90px 0; }
.drone-card { background: linear-gradient(135deg, #1A2338 0%, #101626 100%); border: 1px solid var(--border-dark); border-radius: 20px; padding: 48px; display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: center; }
.drone-text h2 { font-size: 2.2rem; margin-bottom: 16px; }
.drone-text p { color: var(--text-muted); margin-bottom: 20px; font-size: 1rem; }
.drone-bullets { list-style: none; display: flex; flex-direction: column; gap: 10px; font-size: 0.94rem; color: #E2E8F0; }
.drone-form-wrap { background: #0B0F19; border: 1px solid var(--border-dark); padding: 28px; border-radius: 12px; }
.drone-form h4 { font-size: 1.15rem; margin-bottom: 16px; }
.f-group { margin-bottom: 14px; }
.f-group label { display: block; font-size: 0.82rem; margin-bottom: 6px; color: var(--text-muted); }
.f-group input { width: 100%; background: #131A2B; border: 1px solid var(--border-dark); color: #fff; padding: 12px; border-radius: 6px; }

/* Footer */
.footer { background: #060910; border-top: 1px solid var(--border-dark); padding: 30px 0; font-size: 0.88rem; color: var(--text-muted); }
.footer-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-row strong { color: #fff; }
.back-link { color: var(--amber-accent); text-decoration: none; font-weight: 600; }

@media (max-width: 860px) {
  .hero-grid, .drone-card { grid-template-columns: 1fr; }
  .nav { display: none; }
}