/* ═══════════════════════════════════════════════════════════
   AMERICAN GLASS EXPERTS — style.css
   Premium white default + dark toggle
   ═══════════════════════════════════════════════════════════ */

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
img { max-width: 100%; display: block; }
a { text-decoration: none; }
ul { list-style: none; }

/* ── LIGHT THEME ── */
:root {
  --bg:          #ffffff;
  --bg-soft:     #f7f8fa;
  --bg-card:     #ffffff;
  --bg-nav:      rgba(255,255,255,0.97);
  --surface:     #eef0f4;
  --border:      #e2e6ea;
  --border-md:   #c8cdd4;

  --blue:        #4a90d9;
  --blue-dk:     #3a7bc8;
  --blue-lt:     #6aaee8;
  --blue-dim:    rgba(74,144,217,0.08);
  --blue-glow:   rgba(74,144,217,0.22);

  --coal:        #0f172a;
  --charcoal:    #1e293b;
  --text:        #374151;
  --text-mid:    #6b7280;
  --text-dim:    #9ca3af;
  --white:       #ffffff;

  --sh-sm: 0 1px 4px rgba(0,0,0,0.07);
  --sh-md: 0 4px 20px rgba(0,0,0,0.09);
  --sh-lg: 0 16px 48px rgba(0,0,0,0.13);
  --sh-xl: 0 32px 80px rgba(0,0,0,0.18);

  --head: 'Playfair Display', Georgia, serif;
  --body: 'DM Sans', system-ui, sans-serif;
  --r:    6px;
  --r-lg: 16px;
  --t:    0.22s ease;
}

/* ── DARK THEME ── */
[data-theme="dark"] {
  --bg:          #0d1117;
  --bg-soft:     #182035;
  --bg-card:     #1a2332;
  --bg-nav:      rgba(13,17,23,0.97);
  --surface:     #1e2d42;
  --border:      #2a3a52;
  --border-md:   #3a4f6a;

  --blue:        #4a90d9;
  --blue-dk:     #3a7bc8;
  --blue-lt:     #5ba3e8;
  --blue-dim:    rgba(74,144,217,0.12);
  --blue-glow:   rgba(74,144,217,0.25);

  --coal:        #e8edf5;
  --charcoal:    #d4dce8;
  --text:        #b0bec5;
  --text-mid:    #8a9bb0;
  --text-dim:    #5a6a7a;
  --white:       #e8edf5;
}

body { font-family: var(--body); color: var(--text); background: var(--bg); line-height: 1.6; }
h1, h2, h3, h4 { font-family: var(--head); color: var(--coal); line-height: 1.25; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 48px; }
section { padding: 88px 0; }
.section-label { display: inline-block; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--blue); margin-bottom: 16px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px; border-radius: var(--r); font-weight: 600; font-size: 0.92rem; cursor: pointer; border: 2px solid transparent; transition: background var(--t), color var(--t), border-color var(--t), box-shadow var(--t); font-family: var(--body); }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dk); box-shadow: 0 4px 20px var(--blue-glow); }

/* ── TOP BAR ── */
.top-bar { background: var(--charcoal); color: rgba(255,255,255,0.8); font-size: 0.78rem; padding: 9px 48px; display: flex; align-items: center; justify-content: space-between; font-weight: 500; }
[data-theme="dark"] .top-bar { background: var(--bg-soft); }
.top-bar-phone { color: #fff; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.top-bar-right { display: flex; align-items: center; gap: 24px; }
.top-bar-right a { color: rgba(255,255,255,0.7); transition: color var(--t); }
.top-bar-right a:hover { color: #fff; }

/* ── NAV ── */
.nav { position: sticky; top: 0; z-index: 300; background: var(--bg-nav); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); transition: box-shadow var(--t); }
.nav.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.09); }
.nav-inner { max-width: 1160px; margin: 0 auto; padding: 0 48px; height: 70px; display: flex; align-items: center; gap: 40px; }
.nav-logo { display: flex; align-items: center; margin-right: auto; }
.nav-logo img { height: 36px; width: auto; }
.logo-light { display: block; }
.logo-dark  { display: none;  }
[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark  { display: block; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links li { position: relative; }
.nav-links a { display: block; padding: 8px 14px; border-radius: var(--r); font-size: 0.88rem; font-weight: 500; color: var(--text); transition: color var(--t), background var(--t); }
.nav-links a:hover, .nav-links a.active { color: var(--blue); background: var(--blue-dim); }
.nav-dropdown:hover .nav-sub { opacity: 1; pointer-events: all; transform: translateY(0); }
.nav-sub { position: absolute; top: calc(100% + 8px); left: 0; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 8px; min-width: 210px; box-shadow: var(--sh-lg); opacity: 0; pointer-events: none; transform: translateY(-8px); transition: opacity 0.2s, transform 0.2s; z-index: 400; }
.nav-sub li a { display: block; padding: 10px 14px; font-size: 0.86rem; border-radius: var(--r); color: var(--text); white-space: nowrap; }
.nav-sub li a:hover { color: var(--blue); background: var(--blue-dim); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.theme-toggle { width: 36px; height: 36px; border-radius: 50%; background: var(--surface); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--text-mid); transition: background var(--t), color var(--t); }
.theme-toggle:hover { background: var(--blue-dim); color: var(--blue); }
.icon-moon { display: block; }
.icon-sun  { display: none;  }
[data-theme="dark"] .icon-moon { display: none;  }
[data-theme="dark"] .icon-sun  { display: block; }
.nav-cta { font-size: 0.85rem; padding: 9px 20px; }
.nav-hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 40px; height: 40px; cursor: pointer; background: none; border: none; padding: 0; }
.nav-hamburger span { display: block; height: 2px; background: var(--text); border-radius: 2px; transition: transform 0.25s, opacity 0.25s; }
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-mobile { display: none; position: fixed; top: 70px; left: 0; right: 0; bottom: 0; background: var(--bg); z-index: 299; padding: 24px; flex-direction: column; gap: 6px; border-top: 1px solid var(--border); overflow-y: auto; }
.nav-mobile.open { display: flex; }
.nav-mobile a { color: var(--text); font-size: 1rem; font-weight: 500; padding: 14px 16px; border-radius: var(--r); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; transition: color var(--t), background var(--t); }
.nav-mobile a:hover { color: var(--blue); background: var(--blue-dim); }

/* ── FOOTER ── */
.footer { background: var(--charcoal); padding: 0 0 40px; color: #fff; }
[data-theme="dark"] .footer { background: var(--bg-soft); border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand-name { font-family: var(--head); font-size: 1.4rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-brand-name span { color: var(--blue); }
.footer-desc { font-size: 0.85rem; color: rgba(255,255,255,0.5); line-height: 1.7; }
.footer-col h5 { font-family: var(--body); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(255,255,255,0.35); margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,0.55); font-size: 0.88rem; padding: 4px 0; transition: color var(--t); }
.footer-col a:hover { color: var(--blue); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.07); padding-top: 28px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.78rem; color: rgba(255,255,255,0.28); }
.footer-bottom a { color: rgba(255,255,255,0.35); transition: color var(--t); }
.footer-bottom a:hover { color: var(--blue); }

/* ── PAGE HERO ── */
.page-hero { background: var(--bg-soft); border-bottom: 1px solid var(--border); padding: 80px 0 64px; position: relative; overflow: hidden; }
.page-hero::after { content: ''; position: absolute; right: 0; top: 0; bottom: 0; width: 40%; background: linear-gradient(to left, var(--blue-dim), transparent); pointer-events: none; }
.page-hero .container { position: relative; z-index: 1; }

/* ── BLOG CONTENT ── */
.content-section { padding: 64px 0; }
.content-section:nth-child(even) { background: var(--bg-soft); }
.blog-meta { font-size: .8rem; color: var(--text-dim); margin-bottom: 24px; letter-spacing: .05em; text-transform: uppercase; }
.blog-body h2 { font-family: var(--head); font-size: 1.45rem; margin: 36px 0 12px; }
.blog-body p { color: var(--text-mid); line-height: 1.85; margin-bottom: 16px; }
.blog-body ul { color: var(--text-mid); line-height: 1.85; padding-left: 22px; margin-bottom: 16px; }
.blog-body li { margin-bottom: 8px; }
.price-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.price-table th { background: var(--bg-soft); padding: 10px 16px; text-align: left; font-size: .85rem; color: var(--text-mid); }
.price-table td { padding: 10px 16px; border-bottom: 1px solid var(--border); font-size: .9rem; }
.btn-call { display: inline-flex; align-items: center; gap: 10px; background: #fff; color: var(--blue); font-weight: 700; padding: 14px 28px; border-radius: var(--r); font-size: 1rem; transition: background var(--t), box-shadow var(--t); }
.btn-call:hover { background: #f0f5ff; box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
.skip-link { position: absolute; top: -100px; left: 16px; background: var(--blue); color: #fff; padding: 10px 20px; border-radius: 0 0 var(--r) var(--r); font-size: 0.85rem; font-weight: 700; z-index: 9999; transition: top 0.2s; }
.skip-link:focus { top: 0; }

  .page-hero{padding:80px 0 56px;background:var(--bg)}
  .page-hero h1{font-family:var(--head);font-size:clamp(2rem,4vw,2.8rem);line-height:1.2;margin-bottom:16px}
  .content-section{padding:64px 0}
  .content-section:nth-child(even){background:var(--bg-soft)}
  .content-section h2{font-family:var(--head);font-size:1.75rem;margin-bottom:16px}
  .content-section p{color:var(--text-mid);line-height:1.8;margin-bottom:14px}
  .content-section ul{color:var(--text-mid);line-height:1.8;padding-left:20px}
  .content-section li{margin-bottom:8px}
  .cta-band .btn-call{background:#fff;color:var(--blue)}

@media (max-width: 1024px) { .container { padding: 0 32px; } .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 768px) { .container { padding: 0 20px; } section { padding: 72px 0; } .top-bar { padding: 8px 20px; } .top-bar-right { display: none; } .nav-inner { padding: 0 20px; } .nav-links { display: none; } .nav-hamburger { display: flex; } .footer-grid { grid-template-columns: 1fr; gap: 28px; } }

/* ── CONTACT STRIP ── */
.contact-strip {
  background: linear-gradient(180deg, #1a2535 0%, #0d1117 100%);
  padding: 96px 0; text-align: center;
  position: relative; overflow: hidden;
}
[data-theme="dark"] .contact-strip {
  background: linear-gradient(180deg, #1a2535 0%, #0d1117 100%);
}
.contact-strip::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(74,144,217,0.22) 0%, transparent 65%);
  pointer-events: none;
}
.contact-strip h2 { color: #fff; margin-bottom: 12px; }
[data-theme="dark"] .contact-strip h2 { color: var(--white); }
.contact-strip-sub { font-size: 1rem; color: rgba(255,255,255,0.55); margin-bottom: 44px; }
[data-theme="dark"] .contact-strip-sub { color: var(--text-mid); }
.contact-actions { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 18px; }
.contact-actions-main { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.btn-call {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--blue); color: #fff;
  font-size: 1rem; font-weight: 700;
  padding: 17px 40px; border-radius: var(--r); letter-spacing: 0.01em;
  border: none; cursor: pointer; text-decoration: none;
  box-shadow: 0 4px 20px var(--blue-glow), 0 1px 0 rgba(255,255,255,0.15) inset;
  transition: all var(--t);
}
.btn-call:hover { background: var(--blue-dk); transform: translateY(-2px); }
.contact-prefer-write { font-size: 0.82rem; color: rgba(255,255,255,0.35); text-decoration: none; transition: color var(--t); display: inline-flex; align-items: center; gap: 6px; }
.contact-prefer-write:hover { color: rgba(255,255,255,0.65); }