/* ==========================================================================
   SVP Chemical Plant Services — main stylesheet
   Industrial dark design system. No frameworks.
   ========================================================================== */

:root {
  --ink: #10161f;        /* darkest ground: header, hero, footer */
  --navy: #1a2332;       /* dark panel */
  --navy-2: #243044;     /* raised card on dark */
  --accent: #f5a623;     /* safety amber: CTAs, numbers, rules */
  --accent-deep: #d88b0a;
  --paper: #f6f7f9;      /* alternate light section */
  --white: #ffffff;
  --text: #2b3442;       /* body text on light */
  --muted: #5c6673;
  --line: #e2e6ec;
  --line-dark: #2c394e;
  --text-on-dark: #c8d0dc;
  --radius: 6px;
  --container: 1120px;
  --font-head: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "Barlow", "Helvetica Neue", Arial, sans-serif;
}

/* Base ------------------------------------------------------------------- */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 0.5em;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.9rem, 3.5vw, 2.6rem); }
h3 { font-size: 1.45rem; }
h4 { font-size: 1.15rem; }

p { margin: 0 0 1.1em; }

a { color: var(--accent-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

ul { padding-left: 1.2em; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.section { padding: 88px 0; }
.section.alt { background: var(--paper); }
.section-heading { max-width: 720px; margin-bottom: 48px; }
.section-heading p { color: var(--muted); font-size: 1.06rem; }

/* Buttons ----------------------------------------------------------------- */

.btn {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 13px 30px 12px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn:hover { text-decoration: none; }

.btn-accent { background: var(--accent); color: var(--ink); border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-deep); border-color: var(--accent-deep); }

.btn-ghost { background: transparent; color: var(--white); border-color: rgba(255, 255, 255, 0.45); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-dark { background: var(--ink); color: var(--white); border-color: var(--ink); }
.btn-dark:hover { background: var(--navy-2); border-color: var(--navy-2); }

/* Header ------------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  border-bottom: 1px solid var(--line-dark);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
}
.brand:hover { text-decoration: none; }
.brand svg { flex: 0 0 auto; }
.brand-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.05;
}
.brand-name small {
  display: block;
  font-weight: 400;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  color: var(--text-on-dark);
}

.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.02rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-on-dark);
  padding: 8px 13px;
  border-radius: var(--radius);
}
.site-nav a:hover { color: var(--white); text-decoration: none; }
.site-nav a.active { color: var(--accent); }
.site-nav .nav-cta {
  margin-left: 10px;
  background: var(--accent);
  color: var(--ink);
  font-weight: 600;
  padding: 9px 20px 8px;
}
.site-nav .nav-cta:hover { background: var(--accent-deep); color: var(--ink); }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  margin: 5px 0;
  transition: transform 0.2s, opacity 0.2s;
}


/* Services dropdown ------------------------------------------------------- */

.nav-item { position: relative; display: flex; align-items: center; height: 68px; }

.has-dropdown::after {
  content: "";
  display: inline-block;
  margin-left: 7px;
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}

.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 420px;
  background: var(--navy);
  border: 1px solid var(--line-dark);
  border-top: 3px solid var(--accent);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 6px 0;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
}

.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown { display: block; }

.site-nav .dropdown a {
  display: block;
  padding: 11px 20px;
  font-size: 0.98rem;
  letter-spacing: 0.06em;
  border-radius: 0;
}
.site-nav .dropdown a:hover { background: var(--navy-2); color: var(--accent); }
.site-nav .dropdown a small {
  display: block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--text-on-dark);
  opacity: 0.75;
  margin-top: 1px;
  white-space: normal;
}
.site-nav .dropdown a:hover small { color: var(--text-on-dark); }

/* Hero -------------------------------------------------------------------- */

.hero {
  position: relative;
  background: linear-gradient(160deg, var(--ink) 0%, var(--navy) 100%);
  color: var(--white);
  overflow: hidden;
}
.hero .container {
  position: relative;
  z-index: 1;
  padding-top: 110px;
  padding-bottom: 110px;
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 { color: var(--white); margin-bottom: 20px; }
.hero .lede {
  font-size: 1.18rem;
  color: var(--text-on-dark);
  max-width: 620px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.14;
  pointer-events: none;
}

/* Compact page hero (interior pages) */
.page-hero {
  background: linear-gradient(160deg, var(--ink) 0%, var(--navy) 100%);
  color: var(--white);
  padding: 64px 0 58px;
  border-bottom: 4px solid var(--accent);
}
.page-hero h1 { color: var(--white); font-size: clamp(2rem, 4.5vw, 3rem); margin-bottom: 10px; }
.page-hero .lede { color: var(--text-on-dark); font-size: 1.1rem; max-width: 680px; margin: 0; }
.page-hero .eyebrow { margin-bottom: 8px; }

/* Stat band ---------------------------------------------------------------- */

.stats {
  background: var(--navy);
  border-top: 1px solid var(--line-dark);
}
.stats .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 40px;
  padding-bottom: 40px;
}
.stat { text-align: left; border-left: 3px solid var(--accent); padding-left: 18px; }
.stat strong {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 2.3rem;
  line-height: 1;
  color: var(--white);
}
.stat span {
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-on-dark);
}

/* Cards -------------------------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 26px 24px;
  display: flex;
  flex-direction: column;
}
.card h3 { font-size: 1.3rem; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.98rem; flex: 1; }
.card .card-link {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-deep);
}
.card .card-link::after { content: " \2192"; }

a.card { color: inherit; transition: border-color 0.15s, transform 0.15s; }
a.card:hover {
  text-decoration: none;
  border-color: var(--accent);
  transform: translateY(-3px);
}

/* Check list ---------------------------------------------------------------- */

.check-list { list-style: none; padding: 0; margin: 0 0 1.2em; }
.check-list li {
  position: relative;
  padding: 7px 0 7px 32px;
  border-bottom: 1px solid var(--line);
}
.check-list li:last-child { border-bottom: 0; }
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 16px;
  height: 16px;
  background: var(--accent);
  clip-path: polygon(14% 44%, 0 65%, 40% 100%, 100% 18%, 82% 0%, 38% 62%);
}

/* Two-column service layout -------------------------------------------------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 56px;
  align-items: start;
}

.aside-card {
  background: var(--navy);
  color: var(--text-on-dark);
  border-radius: var(--radius);
  padding: 30px 28px;
  position: sticky;
  top: 92px;
}
.aside-card h3 { color: var(--white); font-size: 1.25rem; }
.aside-card p { font-size: 0.96rem; }
.aside-card .btn { width: 100%; text-align: center; margin-top: 6px; }
.aside-card a:not(.btn) { color: var(--accent); }

/* About -------------------------------------------------------------------- */

.bio-grid {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
.bio-photo img {
  border-radius: var(--radius);
  border-bottom: 4px solid var(--accent);
}
.bio-photo figcaption {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

.cred-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 8px;
}
.cred {
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: var(--white);
}
.cred h4 { margin-bottom: 4px; }
.cred p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* Partners ------------------------------------------------------------------ */

.partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.partner {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 22px 24px;
  transition: border-color 0.15s;
}
.partner:hover { border-color: var(--accent); text-decoration: none; }
.partner h4 { margin-bottom: 2px; }
.partner span { color: var(--muted); font-size: 0.94rem; }

/* CTA band ------------------------------------------------------------------- */

.cta-band {
  background: linear-gradient(160deg, var(--ink) 0%, var(--navy) 100%);
  color: var(--white);
  padding: 72px 0;
  text-align: center;
}
.cta-band h2 { color: var(--white); }
.cta-band p { color: var(--text-on-dark); max-width: 560px; margin: 0 auto 28px; }

/* Contact -------------------------------------------------------------------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 56px;
  align-items: start;
}

.contact-form label {
  display: block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--ink);
}
.contact-form .field { margin-bottom: 20px; }
.contact-form input,
.contact-form textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 0;
  border-color: var(--accent);
}
.contact-form textarea { min-height: 160px; resize: vertical; }

.contact-methods { list-style: none; padding: 0; margin: 0; }
.contact-methods li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-dark);
}
.contact-methods li:last-child { border-bottom: 0; }
.contact-methods svg { flex: 0 0 auto; margin-top: 3px; }
.contact-methods strong {
  display: block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
}
.contact-methods a { color: var(--accent); }

/* Footer --------------------------------------------------------------------- */

.site-footer {
  background: var(--ink);
  color: var(--text-on-dark);
  padding: 56px 0 32px;
  font-size: 0.95rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line-dark);
}
.site-footer h4 { color: var(--white); font-size: 1rem; letter-spacing: 0.12em; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--text-on-dark); }
.site-footer a:hover { color: var(--accent); text-decoration: none; }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 22px;
  font-size: 0.85rem;
  color: #7d8794;
}

/* Prose helpers ---------------------------------------------------------------- */

.prose h2 { font-size: 1.7rem; margin-top: 1.6em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.3rem; margin-top: 1.4em; }

/* Responsive -------------------------------------------------------------------- */

@media (max-width: 960px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .aside-card { position: static; }
  .bio-grid { grid-template-columns: 1fr; }
  .bio-photo { max-width: 340px; }
  .stats .container { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 700px) {
  .section { padding: 60px 0; }
  .card-grid, .card-grid.cols-2, .cred-grid, .partner-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero .container { padding-top: 72px; padding-bottom: 72px; }

  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--ink);
    border-bottom: 1px solid var(--line-dark);
    padding: 12px 24px 20px;
    gap: 2px;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 8px; }
  .site-nav .nav-cta { margin: 10px 0 0; text-align: center; }

  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* Dropdown becomes an always-visible indented list in the mobile panel */
  .nav-item { display: block; height: auto; }
  .dropdown {
    display: block;
    position: static;
    min-width: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    padding: 0 0 4px 18px;
  }
  .site-nav .dropdown a { padding: 9px 8px; color: var(--text-on-dark); opacity: 0.85; }
  .site-nav .dropdown a small { display: none; }
  .has-dropdown::after { display: none; }

}