/* ===== AQUAKEM — INDUSTRIAL CHEMICAL PROCESSING — same tokens as Oil & Gas / Pharma ===== */
:root {
  --white:          #ffffff;
  --paper:          #ffffff;
  --paper-2:        #f0f7ff;
  --paper-3:        #e8f4ff;
  --line:           #dbe8f5;
  --line-soft:      #eaf0f8;

  --blue:           #007BFF;
  --blue-deep:      #0056c7;
  --blue-bright:    #3399FF;
  --blue-soft:      #eef4ff;

  --gold:           #FFC000;
  --gold-soft:      #fff3cc;
  --gold-deep:      #e6ac00;

  --teal:           #2f9e57;
  --teal-soft:      #e9f8ee;

  --text-ink:       #333333;
  --text-ink-dim:   #666666;
  --text-on-blue:   #ffffff;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: Arial, Helvetica, sans-serif; background: var(--paper); color: var(--text-ink); -webkit-font-smoothing: antialiased; line-height: 1.5; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
a { text-decoration: none; color: inherit; }

.section-inner { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.section-center { text-align: center; max-width: 768px; margin: 0 auto 64px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 18px;
  font-size: 12px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase;
  color: var(--blue); margin-bottom: 16px;
}
.section-tag::before, .section-tag::after { content: ""; width: 40px; height: 1px; background: var(--blue); display: inline-block; }

.page-section { padding: 110px 0; background: var(--paper); }
.page-section.alt { background: var(--paper-2); }
.page-section h2 { font-size: clamp(2rem, 3.6vw, 3rem); color: var(--blue-deep); font-weight: 400; letter-spacing: -0.02em; line-height: 1.08; margin-bottom: 20px; }
.page-section h2 span { color: var(--gold); }
.page-section .section-description { color: var(--text-ink-dim); font-size: 18px; line-height: 1.6; max-width: 720px; margin: 0 auto; }

/* NAV */
.ak-nav { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.ak-nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; max-width: 1240px; margin: 0 auto; }
.ak-logo { font-weight: 700; font-size: 20px; color: var(--blue-deep); letter-spacing: -.02em; }
.ak-logo span { color: var(--gold); }
.ak-nav-links { display: none; gap: 32px; font-size: 14px; color: var(--text-ink-dim); }
.ak-nav-links a:hover { color: var(--blue); }
@media (min-width: 768px) { .ak-nav-links { display: flex; } }

/* HERO */
.hero-oil-gas {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 60%, #003f9e 100%);
  color: var(--text-on-blue);
  padding: 120px 24px 100px;
  position: relative; overflow: hidden;
}
.hero-content { display: grid; grid-template-columns: 1.15fr 1fr; gap: 64px; align-items: center; max-width: 1240px; margin: 0 auto; width: 100%; position: relative; z-index: 1; }
.hero-eyebrow { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
.eyebrow-bar { width: 56px; height: 2px; background: var(--gold); display: inline-block; }
.hero-oil-gas h3 { font-size: 12px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); }
.hero-oil-gas h1 { font-size: clamp(38px, 5vw, 58px); line-height: 1.12; font-weight: 700; letter-spacing: -0.01em; color: #fff; margin: 0 0 28px; }
.hero-oil-gas h1 em { font-style: normal; font-weight: 700; color: var(--gold); }
.hero-oil-gas p { font-size: 17px; line-height: 1.7; color: rgba(255,255,255,0.88); max-width: 540px; margin: 0 0 36px; }
.hero-image { min-height: 460px; background-size: cover; background-position: center; border-radius: 8px; position: relative; border: 1px solid rgba(255,255,255,0.2); box-shadow: 0 20px 50px rgba(0,0,0,0.25); }
.hero-image-tag { position: absolute; left: 16px; bottom: 16px; font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--blue-deep); background: rgba(255,255,255,0.92); border: 1px solid rgba(255,255,255,0.5); padding: 8px 12px; border-radius: 4px; backdrop-filter: blur(6px); }
.cta-button {
  display: inline-flex; align-items: center; gap: 14px; font-size: 13px; font-weight: 700; letter-spacing: 2.5px; text-transform: uppercase;
  color: #1a1a1a; background: var(--gold); padding: 18px 32px; border: none; border-radius: 50px; cursor: pointer;
  transition: transform .35s ease, background .35s ease, box-shadow .35s ease; box-shadow: 0 10px 24px rgba(255,192,0,0.35);
}
.cta-button span { transition: transform .35s ease; }
.cta-button:hover { background: var(--gold-deep); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(255,192,0,0.5); }
.cta-button:hover span { transform: translateX(6px); }
.cta-outline {
  display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: #fff; background: transparent; padding: 17px 30px; border: 2px solid rgba(255,255,255,0.4); border-radius: 50px; cursor: pointer; transition: .3s;
}
.cta-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 18px; }
.hero-meta { display: flex; gap: 48px; margin-top: 56px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.25); position: relative; z-index: 1; }
.hero-meta > div { display: flex; flex-direction: column; gap: 4px; }
.hero-meta .num { font-size: 30px; font-weight: 700; color: var(--gold); letter-spacing: -0.02em; }
.hero-meta .lbl { font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: rgba(255,255,255,0.75); }

/* CORE PROGRAM CARDS (overview-grid reused as 3-col) */
.overview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.overview-card { background: var(--white); border: 1px solid var(--line); border-top: 3px solid var(--blue); border-radius: 12px; padding: 32px 28px; transition: .3s; }
.overview-card:hover { transform: translateY(-4px); box-shadow: 0 20px 60px -30px rgba(0,123,255,0.3); border-color: var(--blue); }
.overview-icon { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--blue-soft); color: var(--blue); border-radius: 10px; font-size: 20px; margin-bottom: 18px; }
.overview-card h3 { font-size: 20px; font-weight: 700; color: var(--blue-deep); margin-bottom: 12px; letter-spacing: -0.01em; }
.overview-card p { font-size: 14px; line-height: 1.65; color: var(--text-ink-dim); }

/* TWO COL (checklist + image) */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-top: 8px; }
.two-col.reverse .two-col-media { order: 2; }
.two-col.reverse .two-col-text { order: 1; }
.two-col h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); margin-bottom: 20px; color: var(--blue-deep); }
.two-col h2 span { color: var(--gold); }
.two-col > .two-col-text > p.lede { color: var(--text-ink-dim); line-height: 1.7; margin-bottom: 28px; font-size: 16px; }
.check-list { display: flex; flex-direction: column; gap: 18px; }
.check-item { display: flex; gap: 14px; align-items: flex-start; }
.check-mark { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--gold-soft); color: var(--gold-deep); display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; margin-top: 2px; }
.check-item .t { color: var(--text-ink); line-height: 1.6; font-size: 15px; }
.check-item .t strong { color: var(--blue-deep); }
.two-col-media { border-radius: 12px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 8px 24px rgba(0,123,255,.08); }
.two-col-media img { width: 100%; height: 420px; object-fit: cover; }

/* SECTOR CARDS (Process Water Treatment) */
.solution-sector-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; margin-top: 48px; }
.sector-card { background: var(--white); border: 1px solid var(--line); border-radius: 12px; padding: 40px 36px; transition: .3s; display: flex; flex-direction: column; }
.sector-card:hover { transform: translateY(-6px); box-shadow: 0 20px 60px -30px rgba(0,123,255,0.25); border-color: var(--blue); }
.sector-label { font-size: 11px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase; color: var(--gold-deep); margin-bottom: 12px; }
.sector-card h3 { font-size: 24px; font-weight: 700; color: var(--blue-deep); margin-bottom: 16px; letter-spacing: -0.01em; }
.sector-card > p { font-size: 15px; line-height: 1.7; color: var(--text-ink-dim); }

/* STAT CALLOUT (Corrosion Prevention Performance) */
.stat-callout { display: grid; grid-template-columns: 0.9fr 1.4fr; gap: 64px; align-items: center; background: var(--paper-2); border: 1px solid var(--line); border-radius: 16px; padding: 56px; margin-top: 8px; }
.stat-callout .big-num { font-size: clamp(3.5rem, 8vw, 6rem); font-weight: 800; color: var(--gold-deep); line-height: 1; letter-spacing: -0.02em; }
.stat-callout .big-lbl { margin-top: 16px; font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--text-ink-dim); }
.stat-callout h3 { font-size: 22px; color: var(--blue-deep); margin-bottom: 14px; }
.stat-callout p { color: var(--text-ink-dim); line-height: 1.7; font-size: 15px; }

/* CENTERED CHECKLIST (Heat Exchanger Protection) */
.centered-block { max-width: 820px; margin: 0 auto; text-align: left; }
.centered-block > p.lede { text-align: center; font-size: 18px; color: var(--text-ink-dim); margin-bottom: 40px; line-height: 1.7; }
.centered-block .check-list { gap: 22px; }

/* DARK SPLIT (Wastewater & Reuse) */
.dark-split { background: linear-gradient(135deg, #0056c7 0%, #003f9e 100%); color: #fff; border-radius: 16px; overflow: hidden; display: grid; grid-template-columns: 1fr 1fr; margin-top: 8px; }
.dark-split-text { padding: 64px 56px; }
.dark-split-text h2 { color: #fff; font-size: clamp(1.8rem, 3vw, 2.4rem); margin-bottom: 24px; }
.dark-split-text h2 em { font-style: normal; color: var(--gold); }
.dark-split-text h4 { font-size: 17px; margin-bottom: 10px; color: var(--gold); }
.dark-split-text p { color: rgba(255,255,255,0.85); line-height: 1.7; margin-bottom: 22px; font-size: 15px; }
.dark-split-media img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }

/* TABLE (Technical Support Matrix) */
.table-wrap { background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; margin-top: 48px; }
.table-head { display: grid; grid-template-columns: 1.1fr 1.6fr 1fr; background: var(--blue-deep); font-size: 12px; text-transform: uppercase; letter-spacing: 0.15em; color: #fff; }
.table-head > div { padding: 16px 24px; }
.table-head > div + div { border-left: 1px solid rgba(255,255,255,0.15); }
.table-row { display: grid; grid-template-columns: 1.1fr 1.6fr 1fr; border-top: 1px solid var(--line); }
.table-row > div { padding: 18px 24px; font-size: 14.5px; }
.table-row > div + div { border-left: 1px solid var(--line); }
.table-row .cap { font-weight: 700; color: var(--blue-deep); }
.table-row .desc { color: var(--text-ink-dim); line-height: 1.6; }
.table-row .impact { color: var(--teal); font-weight: 600; }
@media (max-width: 767px) {
  .table-head { display: none; }
  .table-row { display: block; padding: 16px 24px; grid-template-columns: 1fr; }
  .table-row > div { padding: 8px 0; border-left: none !important; }
}

/* CHART (Operational Efficiency Trends) */
.chart-box { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 40px; margin-top: 48px; }
.chart-legend { display: flex; gap: 28px; margin-bottom: 24px; font-size: 14px; color: var(--text-ink-dim); flex-wrap: wrap; }
.chart-legend .dot { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 8px; vertical-align: middle; }
.chart-caption { text-align: center; margin-top: 20px; color: var(--text-ink-dim); font-style: italic; font-size: 14.5px; }

/* CAPABILITIES (Why AquaKem Processing) */
.capabilities-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 48px; }
.capability-card { background: var(--white); border: 1px solid var(--line); border-radius: 12px; padding: 36px 32px; transition: .3s; }
.capability-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px -24px rgba(0,123,255,0.2); border-color: var(--blue); }
.capability-icon { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--teal-soft); color: var(--teal); border-radius: 10px; font-size: 22px; margin-bottom: 18px; }
.capability-card h3 { font-size: 19px; font-weight: 700; color: var(--blue-deep); margin-bottom: 12px; letter-spacing: -0.01em; }
.capability-card p { font-size: 14.5px; line-height: 1.7; color: var(--text-ink-dim); }


/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; }
  .overview-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-callout { grid-template-columns: 1fr; text-align: center; padding: 40px; }
  .stat-callout .big-lbl { text-align: center; }
}
@media (max-width: 768px) {
  .overview-grid, .solution-sector-grid, .capabilities-grid { grid-template-columns: 1fr; }
  .two-col, .dark-split { grid-template-columns: 1fr; }
  .two-col.reverse .two-col-media { order: 1; }
  .two-col.reverse .two-col-text { order: 2; }
  .page-section { padding: 72px 0; }
  .cta-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; max-width: 320px; text-align: center; }
  .hero-meta { flex-wrap: wrap; gap: 28px; }
  .dark-split-text { padding: 48px 32px; }
}
/* ================================================================
   FULL RESPONSIVE PACK — Phone / Tablet / Laptop / Large Desktop
   ================================================================ */

/* ---- Large Desktop (1440px+) ---- */
@media (min-width: 1440px) {
  .section-inner { max-width: 1360px; }
  .hero-content { max-width: 1360px; gap: 80px; }
  .overview-grid { gap: 32px; }
  .capabilities-grid { gap: 32px; }
}

/* ---- Ultra-wide Desktop (1920px+) ---- */
@media (min-width: 1920px) {
  .section-inner { max-width: 1600px; }
  .hero-content { max-width: 1600px; }
  .hero-oil-gas h1 { font-size: clamp(40px, 3.6vw, 68px); }
  .two-col-media img { height: 480px; }
}

/* ---- Tablet (768px – 1023px) ---- */
@media (min-width: 768px) and (max-width: 1023px) {
  .hero-content { grid-template-columns: 1fr; gap: 48px; }
  .overview-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; gap: 40px; }
  .two-col.reverse .two-col-media { order: 1; }
  .two-col.reverse .two-col-text { order: 2; }
  .solution-sector-grid { grid-template-columns: 1fr; }
  .stat-callout { grid-template-columns: 1fr; text-align: center; padding: 48px; }
  .dark-split { grid-template-columns: 1fr; }
  .capabilities-grid { grid-template-columns: repeat(2, 1fr); }
  .table-head, .table-row { grid-template-columns: 1fr 1.4fr 0.8fr; }
}

/* ---- Large Phone / Small Tablet (481px – 767px) ---- */
@media (max-width: 767px) {
  .ak-nav-inner { padding: 14px 16px; }
  .hero-oil-gas { padding: 96px 20px 72px; }
  .hero-meta { gap: 28px; flex-wrap: wrap; }
  .overview-grid { grid-template-columns: 1fr; gap: 20px; }
  .overview-card { padding: 24px 20px; }
  .two-col { gap: 32px; }
  .two-col-media img { height: 260px; }
  .solution-sector-grid { grid-template-columns: 1fr; gap: 20px; }
  .sector-card { padding: 28px 24px; }
  .stat-callout { grid-template-columns: 1fr; text-align: center; padding: 32px 24px; gap: 24px; }
  .dark-split { grid-template-columns: 1fr; }
  .dark-split-text { padding: 40px 24px; }
  .dark-split-media img { min-height: 240px; }
  .capabilities-grid { grid-template-columns: 1fr; gap: 20px; }
  .capability-card { padding: 28px 24px; }
  .chart-box { padding: 24px; }
  .page-section { padding: 4.5rem 0; }
}

/* ---- Small Phone (max 480px) ---- */
@media (max-width: 480px) {
  .ak-logo { font-size: 18px; }
  .hero-oil-gas { padding: 88px 16px 56px; }
  .hero-oil-gas h1 { font-size: 1.9rem; }
  .hero-oil-gas p { font-size: 15px; }
  .cta-button, .cta-outline { width: 100%; justify-content: center; padding: 14px 20px; font-size: 12px; }
  .hero-meta { gap: 20px; }
  .hero-meta .num { font-size: 24px; }
  .overview-card, .sector-card, .capability-card { padding: 22px 18px; }
  .stat-callout .big-num { font-size: 2.75rem; }
  .chart-legend { gap: 16px; font-size: 12.5px; }
  .page-section { padding: 3.5rem 0; }
}