/* ============================================================
   FUJITSU AIR CONDITIONER SERVICE — SHARED STYLES
   Inter font | 18px | 1.6 line-height | Classy navy/slate palette
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

:root {
  --navy:      #0d2340;
  --navy-mid:  #163354;
  --blue:      #1a5fb4;
  --blue-light:#2878d0;
  --sky:       #e8f1fb;
  --accent:    #e8a020;
  --accent-dk: #c98510;
  --text:      #1a2533;
  --text-mid:  #3d4f63;
  --text-lt:   #5c6f84;
  --border:    #d8e3ef;
  --bg:        #f5f8fc;
  --white:     #ffffff;
  --radius:    10px;
  --shadow-sm: 0 2px 8px rgba(13,35,64,0.08);
  --shadow-md: 0 4px 20px rgba(13,35,64,0.12);
  --shadow-lg: 0 8px 40px rgba(13,35,64,0.16);
  --max:       1160px;
  --font:      'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.6;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a   { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-light); }

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font);
  line-height: 1.25;
  color: var(--navy);
  font-weight: 700;
}
h1 { font-size: clamp(28px, 5vw, 48px); }
h2 { font-size: clamp(22px, 3.5vw, 34px); }
h3 { font-size: clamp(18px, 2.5vw, 24px); }
h4 { font-size: 19px; }

p { margin-bottom: 16px; }
p:last-child { margin-bottom: 0; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform .15s, background .15s, box-shadow .15s;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-primary {
  background: var(--accent);
  color: var(--navy);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-dk); border-color: var(--accent-dk); color: var(--navy); }

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}
.btn-outline:hover { background: var(--white); color: var(--navy); }

.btn-blue {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}
.btn-blue:hover { background: var(--blue-light); border-color: var(--blue-light); color: var(--white); }

/* ── SECTION SPACING ── */
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.section-dark { background: var(--navy); color: var(--white); }
.section-dark h2, .section-dark h3, .section-dark h4 { color: var(--white); }
.section-bg { background: var(--bg); }

.section-label {
  display: inline-block;
  background: var(--sky);
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.section-title { margin-bottom: 14px; }
.section-sub { color: var(--text-mid); font-size: 17px; max-width: 560px; margin-bottom: 40px; }

/* ── NAV ── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  box-shadow: var(--shadow-md);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.4px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo span { color: var(--accent); }
.nav-logo .logo-sub { font-size: 11px; font-weight: 500; color: rgba(255,255,255,0.6); display: block; letter-spacing: 0.5px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  color: rgba(255,255,255,0.82);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: color .15s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); }
.nav-links a.active { border-bottom: 2px solid var(--accent); padding-bottom: 2px; }

.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav-phone {
  color: var(--accent);
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
}
.nav-phone:hover { color: var(--white); }

/* hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  background: none;
  border: none;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}

/* mobile nav */
.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--navy-mid);
  padding: 16px 20px;
  gap: 4px;
}
.nav-mobile a {
  color: rgba(255,255,255,0.85);
  font-size: 16px;
  font-weight: 500;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-decoration: none;
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile.open { display: flex; }

/* ── FOOTER ── */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.75);
  padding: 56px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p { font-size: 15px; line-height: 1.65; margin-top: 12px; }
.footer-brand .foot-logo { font-size: 19px; font-weight: 800; color: var(--white); }
.footer-brand .foot-logo span { color: var(--accent); }
.footer-col h4 { color: var(--white); font-size: 15px; margin-bottom: 14px; font-weight: 700; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { color: rgba(255,255,255,0.7); font-size: 15px; text-decoration: none; transition: color .15s; }
.footer-col ul a:hover { color: var(--accent); }
.footer-col .foot-phone { color: var(--accent); font-size: 18px; font-weight: 700; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  flex-wrap: wrap;
  gap: 8px;
}

/* ── CARDS ── */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.card .card-icon { font-size: 36px; margin-bottom: 14px; display: block; }
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p  { font-size: 16px; color: var(--text-mid); margin: 0; }

/* ── GRID HELPERS ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }

/* ── CHECKLIST ── */
.checklist { list-style: none; padding: 0; }
.checklist li {
  padding: 9px 12px 9px 38px;
  position: relative;
  margin-bottom: 8px;
  background: var(--bg);
  border-radius: 8px;
  font-size: 16px;
}
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 12px;
  color: var(--blue);
  font-weight: 700;
}

/* ── INFO BOX ── */
.info-box {
  background: var(--sky);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 22px;
  margin: 24px 0;
  font-size: 16px;
}

/* ── DIVIDER ── */
.divider { border: none; border-top: 1px solid var(--border); margin: 40px 0; }

/* ── BADGE STRIP ── */
.badge-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0;
}
.badge {
  background: var(--sky);
  color: var(--blue);
  border-radius: 20px;
  padding: 5px 16px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--border);
}

/* ── TRUST BAR ── */
.trust-bar {
  background: var(--navy-mid);
  padding: 14px 0;
}
.trust-bar-inner {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 32px;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.88);
  font-size: 14px;
  font-weight: 500;
}
.trust-item .ti { font-size: 18px; }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .trust-bar-inner { gap: 18px; justify-content: flex-start; }
}
@media (max-width: 700px) {
  .section { padding: 48px 0; }
  .section-sm { padding: 36px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-links, .nav-cta .btn { display: none; }
  .nav-hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .nav-phone { font-size: 14px; }
  .trust-bar-inner { gap: 12px; }
  .trust-item { font-size: 13px; }
  .section-sub { font-size: 15px; }
  h2 { font-size: clamp(20px, 5vw, 28px); }
}
@media (max-width: 480px) {
  body { font-size: 16px; }
  .btn { padding: 12px 20px; font-size: 15px; }
  .container { padding: 0 16px; }
  .trust-bar-inner { flex-direction: column; align-items: flex-start; gap: 8px; padding: 0 4px; }
  .card { padding: 20px 16px; }
  .nav-inner { height: 60px; }
  .nav-logo { font-size: 17px; }
  .section-label { font-size: 12px; }
}