/* ===== Prisha Agency – Stylesheet ===== */
:root {
  --navy: #0b3c8c;
  --navy-dk: #072a63;
  --blue: #1d6fe0;
  --sky: #eaf3ff;
  --green: #2fa84f;
  --green-lt: #4cd16f;
  --gold: #f5c242;
  --gold-dk: #c9971f;
  --ink: #14223b;
  --muted: #5a6b86;
  --line: #dbe6f5;
  --bg-soft: #f4f8ff;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(11, 60, 140, .10);
  --shadow-lg: 0 20px 50px rgba(11, 60, 140, .18);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  font-family: 'Poppins', system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .6em; }
p { margin: 0 0 1em; }
svg { width: 1em; height: 1em; flex-shrink: 0; }
.container { width: min(1200px, 100% - 32px); margin-inline: auto; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: .55em;
  padding: .85em 1.6em; border-radius: 50px; border: 0;
  font: 600 .95rem/1 'Poppins', sans-serif; cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
}
.btn svg { width: 1.15em; height: 1.15em; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--blue), var(--navy)); color: #fff; box-shadow: 0 8px 20px rgba(29, 111, 224, .35); }
.btn-primary:hover { box-shadow: 0 12px 28px rgba(29, 111, 224, .45); }
.btn-ghost { background: #fff; color: var(--navy); border: 2px solid var(--line); }
.btn-ghost:hover { border-color: var(--blue); }
.btn-white { background: #fff; color: var(--navy); }
.btn-wa { background: #25d366; color: #fff; box-shadow: 0 8px 20px rgba(37, 211, 102, .35); }

/* ---- Top bar ---- */
.topbar { background: var(--navy-dk); color: #cfe0ff; font-size: .82rem; }
.topbar-inner { display: flex; justify-content: space-between; gap: 16px; padding: 8px 0; flex-wrap: wrap; }
.topbar-left { display: flex; gap: 22px; flex-wrap: wrap; }
.topbar a, .topbar-right { display: inline-flex; align-items: center; gap: 6px; }
.topbar a:hover { color: #fff; }
.topbar svg { color: var(--green-lt); }

/* ---- Header ---- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .3s, border-color .3s;
}
.header.scrolled { box-shadow: 0 6px 24px rgba(11, 60, 140, .08); border-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { width: 46px; height: 46px; }
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-text strong { font-family: Georgia, 'Times New Roman', serif; font-size: 1.55rem; color: var(--navy); letter-spacing: .5px; }
.logo-text small { font-size: .7rem; letter-spacing: .45em; color: var(--navy); font-weight: 600; margin-top: 4px; }
.logo-light .logo-text strong, .logo-light .logo-text small { color: #fff; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a { padding: 8px 14px; border-radius: 30px; font-weight: 500; font-size: .93rem; color: var(--ink); transition: color .2s, background .2s; }
.nav a:hover, .nav a.active { color: var(--blue); background: var(--sky); }
.nav a.nav-cta { background: linear-gradient(135deg, var(--green), #1f8a3d); color: #fff; margin-left: 8px; padding: 9px 20px; }
.nav a.nav-cta:hover { filter: brightness(1.08); }
.menu-btn { display: none; background: none; border: 0; width: 44px; height: 44px; cursor: pointer; padding: 10px; }
.menu-btn span { display: block; height: 2.5px; background: var(--navy); border-radius: 2px; margin: 5px 0; transition: transform .3s, opacity .3s; }
.menu-btn.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.menu-btn.open span:nth-child(2) { opacity: 0; }
.menu-btn.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---- Hero ---- */
.hero { position: relative; overflow: hidden; padding: 70px 0 130px; }
.hero-bg {
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(circle at 85% 20%, rgba(63, 140, 255, .25), transparent 45%),
    radial-gradient(circle at 10% 80%, rgba(47, 168, 79, .16), transparent 40%),
    linear-gradient(180deg, #eef5ff 0%, #f8fbff 100%);
}
.bubbles span {
  position: absolute; bottom: -60px; border-radius: 50%; z-index: -1;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, .9), rgba(63, 140, 255, .25));
  border: 1px solid rgba(63, 140, 255, .25);
  animation: rise linear infinite;
}
.bubbles span:nth-child(1) { left: 8%;  width: 22px; height: 22px; animation-duration: 14s; }
.bubbles span:nth-child(2) { left: 22%; width: 12px; height: 12px; animation-duration: 10s; animation-delay: 2s; }
.bubbles span:nth-child(3) { left: 40%; width: 30px; height: 30px; animation-duration: 18s; animation-delay: 4s; }
.bubbles span:nth-child(4) { left: 58%; width: 16px; height: 16px; animation-duration: 12s; animation-delay: 1s; }
.bubbles span:nth-child(5) { left: 72%; width: 26px; height: 26px; animation-duration: 16s; animation-delay: 6s; }
.bubbles span:nth-child(6) { left: 88%; width: 14px; height: 14px; animation-duration: 11s; animation-delay: 3s; }
.bubbles span:nth-child(7) { left: 50%; width: 10px; height: 10px; animation-duration: 9s; animation-delay: 5s; }
@keyframes rise { to { transform: translateY(-110vh); opacity: 0; } }

.hero-inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--line); color: var(--green);
  padding: 7px 16px; border-radius: 30px; font-size: .85rem; font-weight: 600; font-style: italic;
  box-shadow: var(--shadow);
}
.hero h1 { font-size: clamp(2.1rem, 4.6vw, 3.6rem); font-weight: 800; color: var(--navy); margin: 22px 0 18px; letter-spacing: -.5px; }
.grad { background: linear-gradient(90deg, var(--blue), var(--green)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad sub { font-size: .5em; }
.lead { font-size: 1.08rem; color: var(--muted); max-width: 580px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 28px 0 32px; }
.hero-pills { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 12px; }
.hero-pills li {
  display: flex; align-items: center; gap: 8px; background: #fff; padding: 9px 16px; border-radius: 12px;
  font-size: .88rem; font-weight: 600; color: var(--navy); box-shadow: var(--shadow);
}
.hero-pills svg { width: 22px; height: 22px; padding: 4px; color: #fff; background: var(--green); border-radius: 50%; }

.hero-visual { position: relative; display: grid; place-items: center; min-height: 440px; }
.hero-visual::before {
  content: ""; position: absolute; width: 380px; height: 380px; border-radius: 50%;
  background: radial-gradient(circle, #fff 0%, rgba(255, 255, 255, 0) 70%), linear-gradient(135deg, #d8e9ff, #e5f7ea);
  box-shadow: inset 0 0 60px rgba(29, 111, 224, .15);
}
.cylinder-art { position: relative; width: 250px; height: auto; filter: drop-shadow(0 25px 30px rgba(11, 60, 140, .25)); animation: float 6s ease-in-out infinite; }
@keyframes float { 50% { transform: translateY(-12px); } }
.o2-orb {
  position: absolute; top: 4%; left: 6%; width: 92px; height: 92px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 2rem; color: #fff;
  background: radial-gradient(circle at 30% 30%, #8fc1ff, #1d6fe0 60%, #0b3c8c);
  box-shadow: 0 15px 35px rgba(29, 111, 224, .45), inset -6px -8px 16px rgba(0, 0, 0, .15);
  animation: float 5s ease-in-out infinite reverse;
}
.o2-orb sub { font-size: .55em; }
.float-card {
  position: absolute; display: flex; align-items: center; gap: 10px;
  background: #fff; padding: 12px 16px; border-radius: 14px; box-shadow: var(--shadow-lg);
  font-size: .8rem; animation: float 7s ease-in-out infinite;
}
.float-card svg { width: 36px; height: 36px; padding: 8px; border-radius: 10px; background: var(--sky); color: var(--blue); }
.float-card strong { display: block; color: var(--navy); font-size: .9rem; }
.float-card span { color: var(--muted); }
.fc-1 { right: 0; top: 20%; }
.fc-2 { left: 0; bottom: 12%; animation-delay: 1.5s; }
.fc-2 svg { background: #e6f7eb; color: var(--green); }
.hero-wave { position: absolute; bottom: -1px; left: 0; width: 100%; height: 110px; }

/* ---- Trust strip ---- */
.trust { margin-top: -50px; position: relative; z-index: 2; }
.trust-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: linear-gradient(135deg, #f9d66b, var(--gold) 40%, #e3a92b);
  border-radius: var(--radius); box-shadow: 0 18px 40px rgba(201, 151, 31, .3);
  overflow: hidden;
}
.trust-item { display: flex; align-items: center; gap: 14px; padding: 24px 22px; color: #1d1608; font-weight: 600; font-size: 1rem; line-height: 1.25; }
.trust-item + .trust-item { border-left: 2px solid rgba(29, 22, 8, .2); }
.trust-item svg { width: 42px; height: 42px; color: #1d1608; }

/* ---- Sections ---- */
.section { padding: 100px 0; position: relative; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head p { color: var(--muted); }
.section-tag {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--green); background: #e6f7eb; padding: 6px 14px; border-radius: 30px; margin-bottom: 14px;
}
.section-tag.gold { color: var(--gold); background: rgba(245, 194, 66, .12); border: 1px solid rgba(245, 194, 66, .35); }
.section h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); font-weight: 800; color: var(--navy); }

/* ---- About ---- */
.about-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: center; }
.about-card {
  position: relative; background: linear-gradient(140deg, var(--navy), var(--blue)); color: #e3eeff;
  border-radius: 24px; padding: 40px 36px; box-shadow: var(--shadow-lg); overflow: hidden;
}
.about-card::after {
  content: ""; position: absolute; right: -60px; bottom: -60px; width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(76, 209, 111, .5), transparent 70%);
}
.about-card h3 { color: #fff; font-size: 1.5rem; }
.about-o2 { width: 64px; height: 64px; border-radius: 18px; background: rgba(255, 255, 255, .14); display: grid; place-items: center; margin-bottom: 20px; }
.about-o2 svg { width: 36px; height: 36px; color: #fff; }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: -26px; padding: 0 18px; position: relative; }
.stat { background: #fff; border-radius: 14px; padding: 16px 10px; text-align: center; box-shadow: var(--shadow); }
.stat strong { display: block; font-size: 1.5rem; color: var(--blue); }
.stat span { font-size: .78rem; color: var(--muted); }
.about-text p { color: var(--muted); }
.check-list { list-style: none; padding: 0; margin: 0 0 30px; display: grid; gap: 12px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; font-weight: 500; }
.check-list svg { width: 24px; height: 24px; padding: 5px; color: #fff; background: var(--green); border-radius: 50%; margin-top: 1px; }

/* ---- Services (dark gold) ---- */
.services { background: #07080c; color: #d9d4c6; overflow: hidden; }
.services::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(245, 194, 66, .18) 1px, transparent 1px);
  background-size: 18px 18px; mask-image: linear-gradient(135deg, #000 0%, transparent 40%, transparent 60%, #000 100%);
  -webkit-mask-image: linear-gradient(135deg, #000 0%, transparent 40%, transparent 60%, #000 100%);
}
.services-glow {
  position: absolute; left: -10%; right: -10%; bottom: -120px; height: 260px;
  background: radial-gradient(ellipse at center, rgba(245, 194, 66, .35), transparent 65%);
}
.services .container { position: relative; }
.services h2 { color: #fff; }
.gold-text { background: linear-gradient(90deg, #ffe08a, var(--gold), #d99a1b); -webkit-background-clip: text; background-clip: text; color: transparent; }
.script { font-family: 'Great Vibes', cursive; font-size: 1.9rem; color: var(--gold) !important; margin: 0; }
.script.light { color: #cfe0ff !important; font-size: 1.6rem; }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.service-card {
  position: relative; padding: 30px 26px; border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .015));
  border: 1px solid rgba(245, 194, 66, .22);
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
}
.service-card:hover { transform: translateY(-6px); border-color: var(--gold); box-shadow: 0 18px 40px rgba(245, 194, 66, .15); }
.svc-ic {
  width: 58px; height: 58px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 18px;
  background: radial-gradient(circle at 30% 30%, #ffe8a3, var(--gold) 50%, var(--gold-dk));
  box-shadow: 0 0 0 5px rgba(245, 194, 66, .15);
}
.svc-ic svg { width: 28px; height: 28px; color: #1a1305; }
.service-card h3 { color: #fff; font-size: 1.12rem; }
.service-card p { font-size: .92rem; margin: 0; color: #b9b3a3; }
.products { margin-top: 50px; text-align: center; }
.products h3 { color: var(--gold); font-size: 1.1rem; letter-spacing: .08em; text-transform: uppercase; }
.product-chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.product-chips span {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 40px;
  border: 1px solid rgba(245, 194, 66, .35); color: #f1e6c6; font-size: .9rem; background: rgba(245, 194, 66, .06);
}
.product-chips svg { color: var(--gold); width: 18px; height: 18px; }

/* ---- Gas portfolio ---- */
.gases { background: var(--bg-soft); }
.gas-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.gas-card {
  background: #fff; border-radius: var(--radius); padding: 30px 28px; box-shadow: var(--shadow);
  border-top: 4px solid var(--c); transition: transform .35s var(--ease), box-shadow .35s;
}
.gas-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.gas-badge {
  width: 72px; height: 72px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
  font-weight: 800; font-size: 1.45rem; color: #fff;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, .35), transparent 50%), var(--c);
  box-shadow: 0 10px 22px color-mix(in srgb, var(--c) 40%, transparent);
}
.gas-badge sub { font-size: .55em; }
.gas-card h3 { color: var(--navy); font-size: 1.25rem; }
.gas-card p { color: var(--muted); font-size: .95rem; margin-bottom: .6em; }
.gas-card small { display: block; font-size: .8rem; color: var(--blue); background: var(--sky); padding: 8px 12px; border-radius: 10px; }
.note {
  display: flex; align-items: center; gap: 12px; max-width: 760px; margin: 44px auto 0; padding: 18px 22px;
  background: #fff; border: 1px dashed var(--blue); border-radius: 14px; color: var(--navy); font-size: .92rem;
}
.note svg { width: 30px; height: 30px; color: var(--blue); }

/* ---- Applications ---- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.app-card { border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow); transition: transform .35s var(--ease), box-shadow .35s; }
.app-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.app-top {
  height: 150px; display: grid; place-items: center; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--g1), var(--g2));
}
.app-top::before, .app-top::after {
  content: ""; position: absolute; border-radius: 50%; background: rgba(255, 255, 255, .1);
}
.app-top::before { width: 200px; height: 200px; right: -60px; top: -80px; }
.app-top::after { width: 120px; height: 120px; left: -30px; bottom: -50px; }
.app-top svg { width: 70px; height: 70px; color: #fff; position: relative; z-index: 1; transition: transform .4s var(--ease); }
.app-card:hover .app-top svg { transform: scale(1.12) rotate(-4deg); }
.app-body { padding: 24px 26px 28px; }
.app-body h3 { color: var(--navy); font-size: 1.15rem; }
.app-body p { color: var(--muted); font-size: .93rem; margin: 0; }

/* ---- Safety ---- */
.safety { background: linear-gradient(135deg, var(--navy-dk), var(--navy) 60%, #12509f); color: #d6e4ff; }
.safety h2 { color: #fff; }
.safety .section-tag { background: rgba(76, 209, 111, .15); color: var(--green-lt); }
.safety-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 60px; align-items: center; }
.safety-badge {
  display: flex; align-items: center; gap: 14px; margin-top: 26px; padding: 18px 20px; border-radius: 14px;
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .15); font-weight: 600; color: #fff;
}
.safety-badge svg { width: 40px; height: 40px; color: var(--green-lt); }
.safety-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.safety-list li {
  display: flex; align-items: center; gap: 18px; padding: 18px 22px; border-radius: 14px;
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .1);
  transition: background .3s, transform .3s var(--ease);
}
.safety-list li:hover { background: rgba(255, 255, 255, .12); transform: translateX(6px); }
.safety-list .num { font-weight: 800; font-size: 1.3rem; color: var(--green-lt); min-width: 34px; }
.safety-list p { margin: 0; color: #fff; }

/* ---- Brochure ---- */
.brochure-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.brochure-item {
  border: 0; padding: 0; cursor: zoom-in; background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); text-align: left; font: inherit; transition: transform .35s var(--ease), box-shadow .35s;
}
.brochure-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.brochure-item img { aspect-ratio: 3 / 2; object-fit: cover; width: 100%; }
.brochure-item span { display: block; padding: 16px 20px; font-weight: 600; color: var(--navy); }

/* ---- CTA band ---- */
.cta-band { background: linear-gradient(120deg, var(--green), #1f8a3d 50%, var(--navy)); color: #fff; padding: 56px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-inner h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); margin-bottom: .3em; }
.cta-inner p { margin: 0; opacity: .9; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---- Contact ---- */
.contact { background: var(--bg-soft); }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 50px; align-items: start; }
.contact-info > p { color: var(--muted); }
.info-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 16px; }
.info-list li { display: flex; gap: 16px; align-items: flex-start; background: #fff; padding: 18px 20px; border-radius: 14px; box-shadow: var(--shadow); }
.info-list .ic { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; background: linear-gradient(135deg, var(--blue), var(--navy)); color: #fff; flex-shrink: 0; }
.info-list .ic svg { width: 22px; height: 22px; }
.info-list small { display: block; color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; }
.info-list strong, .info-list a { display: block; color: var(--navy); font-weight: 600; word-break: break-word; }
.info-list a:hover { color: var(--blue); }

.contact-form { background: #fff; border-radius: 22px; padding: 36px; box-shadow: var(--shadow-lg); border-top: 5px solid var(--green); }
.contact-form h3 { color: var(--navy); font-size: 1.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form label { display: block; font-size: .85rem; font-weight: 600; color: var(--navy); margin-bottom: 16px; }
.contact-form input, .contact-form select, .contact-form textarea {
  display: block; width: 100%; margin-top: 6px; padding: 12px 14px; font: 400 .95rem 'Poppins', sans-serif;
  color: var(--ink); border: 1.5px solid var(--line); border-radius: 10px; background: var(--bg-soft);
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  outline: none; border-color: var(--blue); background: #fff; box-shadow: 0 0 0 4px rgba(29, 111, 224, .12);
}
.contact-form .invalid { border-color: #d62828; }
.form-error { color: #d62828; font-size: .85rem; min-height: 1.2em; margin: 0 0 10px; }
.form-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.map-wrap { margin-top: 50px; border-radius: 22px; overflow: hidden; box-shadow: var(--shadow); }
.map-wrap iframe { display: block; width: 100%; height: 340px; border: 0; }

/* ---- Footer ---- */
.footer { background: var(--navy-dk); color: #b9cbec; padding-bottom: 20px; position: relative; }
.footer-wave { display: block; width: 100%; height: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.3fr; gap: 40px; padding: 40px 0; }
.footer h4 { color: #fff; font-size: 1.05rem; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.footer h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 34px; height: 3px; border-radius: 2px; background: var(--green-lt); }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; font-size: .92rem; }
.footer a:hover { color: #fff; }
.footer-tag { margin-top: 16px; font-size: .92rem; }
.f-contact li { display: flex; gap: 10px; align-items: flex-start; }
.f-contact svg { width: 18px; height: 18px; color: var(--green-lt); margin-top: 4px; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; border-top: 1px solid rgba(255, 255, 255, .12); padding-top: 20px; font-size: .85rem; }
.footer-bottom p { margin: 0; }

/* ---- Floating buttons ---- */
.fab {
  position: fixed; right: 20px; z-index: 60; width: 56px; height: 56px; border-radius: 50%;
  display: grid; place-items: center; color: #fff; box-shadow: 0 10px 25px rgba(0, 0, 0, .25);
  transition: transform .25s var(--ease);
}
.fab:hover { transform: scale(1.08); }
.fab svg { width: 28px; height: 28px; }
.fab-wa { bottom: 22px; background: #25d366; }
.fab-wa::before { content: ""; position: absolute; inset: 0; border-radius: 50%; background: #25d366; animation: pulse 2s infinite; z-index: -1; }
@keyframes pulse { to { transform: scale(1.6); opacity: 0; } }
.fab-call { bottom: 88px; background: var(--blue); }
.fab-call svg { width: 24px; height: 24px; }
.to-top {
  position: fixed; left: 20px; bottom: 22px; z-index: 60; width: 46px; height: 46px; border-radius: 50%; border: 0;
  background: var(--navy); color: #fff; display: grid; place-items: center; cursor: pointer;
  opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .3s, transform .3s;
}
.to-top svg { width: 20px; height: 20px; transform: rotate(-90deg); }
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }

/* ---- Lightbox ---- */
.lightbox {
  position: fixed; inset: 0; z-index: 100; background: rgba(4, 12, 30, .92);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px; padding: 50px 16px 24px;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-height: 80vh; max-width: 100%; border-radius: 10px; box-shadow: 0 20px 60px rgba(0, 0, 0, .5); }
.lb-close { position: absolute; top: 10px; right: 18px; background: none; border: 0; color: #fff; font-size: 2.6rem; cursor: pointer; line-height: 1; }

/* ---- Reveal animation ---- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .nav a { padding: 8px 10px; font-size: .88rem; }
  .service-grid, .gas-grid, .app-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .menu-btn { display: block; }
  .nav {
    position: fixed; top: 0; right: 0; height: 100vh; width: min(300px, 82vw); flex-direction: column; align-items: stretch;
    background: #fff; padding: 90px 20px 20px; gap: 6px; box-shadow: -10px 0 40px rgba(0, 0, 0, .15);
    transform: translateX(100%); transition: transform .35s var(--ease); z-index: -1;
  }
  .nav.open { transform: none; }
  .nav a { padding: 12px 16px; font-size: 1rem; }
  .nav a.nav-cta { margin: 10px 0 0; text-align: center; }
  .menu-btn { position: relative; z-index: 2; }
  .hero { padding: 40px 0 120px; }
  .hero-inner, .about-grid, .safety-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 380px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-item:nth-child(3) { border-left: 0; }
  .trust-item:nth-child(n+3) { border-top: 2px solid rgba(29, 22, 8, .2); }
  .section { padding: 72px 0; }
  .brochure-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .topbar-right { display: none; }
  .topbar-left { gap: 14px; font-size: .78rem; }
  .header-inner { height: 66px; }
  .logo-mark { width: 38px; height: 38px; }
  .logo-text strong { font-size: 1.3rem; }
  .hero-visual::before { width: 290px; height: 290px; }
  .cylinder-art { width: 190px; }
  .o2-orb { width: 70px; height: 70px; font-size: 1.5rem; }
  .float-card { padding: 8px 12px; font-size: .72rem; }
  .float-card svg { width: 30px; height: 30px; padding: 6px; }
  .trust-item { padding: 18px 14px; font-size: .86rem; gap: 10px; }
  .trust-item svg { width: 32px; height: 32px; }
  .service-grid, .gas-grid, .app-grid, .brochure-grid, .form-row, .footer-grid { grid-template-columns: 1fr; }
  .form-row { gap: 0; }
  .contact-form { padding: 26px 20px; }
  .stat-row { padding: 0 8px; gap: 8px; }
  .hero-actions .btn, .form-actions .btn { flex: 1 1 100%; justify-content: center; }
  .cta-actions { width: 100%; }
  .cta-actions .btn { flex: 1; justify-content: center; }
}