/* Sentry Metal Services — design system */

:root {
  --color-bg: #ffffff;
  --color-surface: #f5f6f8;
  --color-surface-alt: #ebedf1;
  --color-ink: #0f1418;
  --color-ink-soft: #3a434c;
  --color-ink-muted: #6b7480;
  --color-line: #d9dde2;
  --color-steel: #1895d3;
  --color-steel-deep: #1583ba;
  --color-accent: #d3242c;
  --color-accent-hover: #b01d24;
  --color-accent-soft: #fbe3e4;
  --color-blue: #1895d3;
  --color-blue-hover: #1379ac;
  --color-blue-soft: #e4f2fb;
  --color-success: #1f7a4d;

  --shadow-sm: 0 1px 2px rgba(15, 20, 24, 0.06), 0 1px 1px rgba(15, 20, 24, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 20, 24, 0.08), 0 2px 4px rgba(15, 20, 24, 0.04);
  --shadow-lg: 0 12px 32px rgba(15, 20, 24, 0.12), 0 4px 8px rgba(15, 20, 24, 0.06);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --container: 1200px;
  --container-narrow: 880px;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
  color: var(--color-ink);
}

h1 { font-size: clamp(2.25rem, 4.5vw, 3.75rem); font-weight: 700; letter-spacing: -0.025em; }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.0625rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-ink-soft); font-family: var(--font-sans); font-weight: 600; }

p { margin: 0 0 1em; color: var(--color-ink-soft); }
p.lead { font-size: 1.1875rem; color: var(--color-ink-soft); line-height: 1.55; max-width: 60ch; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 1.5rem; }

.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }
.section-tight { padding: 2rem 0; }
.section-dark { background: var(--color-steel); color: #0f1418; }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #0f1418; }
.section-dark p { color: #16242e; }
.section-surface { background: var(--color-surface); }

.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-line);
}
.btn-secondary:hover { border-color: var(--color-ink); color: var(--color-ink); }

.btn-ghost-light {
  background: transparent;
  color: #ffffff;
  border-color: rgba(255,255,255,0.3);
}
.btn-ghost-light:hover { background: rgba(255,255,255,0.1); color: #ffffff; border-color: #ffffff; }

.btn-lg { padding: 1.0625rem 1.875rem; font-size: 1rem; }

.btn .arrow { transition: transform var(--transition); }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-ink);
}
.brand-logo {
  height: 50px;
  width: auto;
  display: block;
}
@media (max-width: 600px) { .brand-logo { height: 42px; } }
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1.0625rem; letter-spacing: -0.01em; color: var(--color-ink); }
.brand-tag { font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--color-ink-muted); }

.nav-links { display: flex; align-items: center; gap: 2rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--color-ink-soft);
  font-weight: 500;
  font-size: 0.9375rem;
  position: relative;
  padding: 0.5rem 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--color-ink); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--color-blue);
}

.nav-cta { display: flex; align-items: center; gap: 1rem; }
.nav-phone {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-ink-soft);
  font-weight: 500;
  font-size: 0.9375rem;
}
.nav-phone:hover { color: var(--color-ink); }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 40px; height: 40px;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-ink);
  margin: 5px auto;
  transition: transform var(--transition), opacity var(--transition);
}

@media (max-width: 920px) {
  .nav-links { display: none; }
  .nav-phone { display: none; }
  .nav-toggle { display: block; }
  body.nav-open .nav-links {
    display: flex;
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #ffffff;
    border-bottom: 1px solid var(--color-line);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-md);
  }
  body.nav-open .nav-links a {
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--color-line);
    font-size: 1.0625rem;
  }
  body.nav-open .nav-links a:last-child { border-bottom: 0; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: linear-gradient(180deg, var(--color-steel-deep) 0%, var(--color-steel) 100%);
  color: #0f1418;
  padding: 6rem 0 5rem;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.16) 0%, transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(255,255,255,0.05) 0%, transparent 50%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(135deg, rgba(255,255,255,0.025) 25%, transparent 25%),
    linear-gradient(225deg, rgba(255,255,255,0.025) 25%, transparent 25%);
  background-size: 60px 60px;
  pointer-events: none;
  opacity: 0.4;
}
.hero .container { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero h1 {
  color: #0f1418;
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 1.25rem;
}
.hero h1 .accent { color: #ffffff; }
.hero .lead { color: #15212a; font-size: 1.1875rem; max-width: 56ch; margin-bottom: 2rem; }

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  padding: 2rem;
  background: rgba(255,255,255,0.22);
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
}
.hero-stat-num {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: #0f1418;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 0.375rem;
}
.hero-stat-label { font-size: 0.875rem; color: #15212a; line-height: 1.4; }

@media (max-width: 880px) {
  .hero { padding: 4rem 0 3.5rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ---------- Capabilities (Home) ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.cap-card {
  padding: 2rem;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.cap-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-ink);
}
.cap-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
}
.cap-card h3 { font-size: 1.1875rem; margin-bottom: 0.5rem; }
.cap-card p { font-size: 0.9375rem; margin: 0; }

/* ---------- Section heading ---------- */
.section-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: end;
  margin-bottom: 3rem;
}
.section-head h2 { margin: 0; }
.section-head p { margin: 0; font-size: 1.0625rem; }
@media (max-width: 720px) {
  .section-head { grid-template-columns: 1fr; gap: 1rem; }
}

/* ---------- Project gallery ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.project-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-steel);
  aspect-ratio: 4 / 3;
  cursor: pointer;
  transition: transform var(--transition);
}
.project-card:hover { transform: translateY(-3px); }
.project-card .placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, var(--color-steel) 0%, var(--color-steel-deep) 100%);
  color: rgba(255,255,255,0.18);
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.project-card .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.75) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  color: #ffffff;
}
.project-card .tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.375rem;
}
.project-card h3 { color: #ffffff; font-size: 1.125rem; margin: 0 0 0.25rem; }
.project-card p { color: rgba(255,255,255,0.78); font-size: 0.875rem; margin: 0; }

/* ---------- Services list ---------- */
.svc-list { display: grid; gap: 1.25rem; margin-top: 2.5rem; }
.svc-row {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 1.5rem;
  align-items: center;
  padding: 1.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.svc-row:hover { border-color: var(--color-ink); box-shadow: var(--shadow-sm); }
.svc-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}
.svc-row h3 { margin: 0 0 0.375rem; font-size: 1.1875rem; }
.svc-row p { margin: 0; font-size: 0.9375rem; }
.svc-row .btn { align-self: center; }
@media (max-width: 720px) {
  .svc-row { grid-template-columns: 1fr; gap: 0.75rem; padding: 1.5rem; }
  .svc-row .btn { justify-self: start; }
}

/* ---------- Specs strip ---------- */
.specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
}
.spec {
  padding: 1.75rem 1.5rem;
  border-right: 1px solid var(--color-line);
  text-align: center;
}
.spec:last-child { border-right: 0; }
.spec-num { font-family: var(--font-display); font-size: 2rem; font-weight: 700; color: var(--color-ink); letter-spacing: -0.02em; line-height: 1; margin-bottom: 0.5rem; }
.spec-label { font-size: 0.8125rem; color: var(--color-ink-muted); text-transform: uppercase; letter-spacing: 0.08em; }
@media (max-width: 720px) {
  .spec { border-right: 0; border-bottom: 1px solid var(--color-line); }
  .spec:last-child { border-bottom: 0; }
}

/* ---------- About columns ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
@media (max-width: 880px) { .two-col { grid-template-columns: 1fr; gap: 2.5rem; } }

.value-list { display: grid; gap: 1.25rem; list-style: none; padding: 0; margin: 0; }
.value-list li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 0.875rem;
  align-items: start;
}
.value-list .dot {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: 50%;
  margin-top: 2px;
  flex-shrink: 0;
}
.value-list strong { display: block; font-size: 1rem; color: var(--color-ink); margin-bottom: 0.125rem; }
.value-list span { color: var(--color-ink-soft); font-size: 0.9375rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--color-steel) 0%, var(--color-steel-deep) 100%);
  color: #0f1418;
  padding: 4.5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 50% 0%, rgba(255,255,255,0.16) 0%, transparent 60%);
  pointer-events: none;
}
.cta-band .container { position: relative; }
.cta-band h2 { color: #0f1418; margin-bottom: 0.75rem; }
.cta-band p { color: #15212a; font-size: 1.125rem; max-width: 52ch; margin: 0 auto 2rem; }
.cta-band .btn-group { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---------- Contact / Form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 4rem;
}
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; } }

.form { display: grid; gap: 1.25rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 0.375rem; }
.form-field label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}
.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.75rem 0.875rem;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: inherit;
  font-size: 0.9375rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(211,36,44,0.15);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-field .hint { font-size: 0.8125rem; color: var(--color-ink-muted); margin-top: 0.125rem; }

.contact-info { display: grid; gap: 1.5rem; }
.contact-card {
  padding: 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
}
.contact-card h4 { margin: 0 0 0.5rem; color: var(--color-ink); font-size: 0.75rem; }
.contact-card a, .contact-card p { color: var(--color-ink); font-size: 1rem; font-weight: 500; margin: 0; }
.contact-card a { display: block; }
.contact-card .sub { font-size: 0.875rem; color: var(--color-ink-muted); font-weight: 400; margin-top: 0.25rem; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-steel-deep);
  color: #0f2630;
  padding: 4rem 0 2rem;
}
.site-footer h4 { color: #0f1418; font-size: 0.75rem; margin-bottom: 1rem; }
.site-footer a { color: #0f2630; }
.site-footer a:hover { color: #000000; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand .brand-name { color: #ffffff; }
.footer-brand .brand-tag { color: #6b7480; }
.footer-brand p { color: #0f2630; max-width: 36ch; margin-top: 1rem; font-size: 0.9375rem; }

.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.625rem; }
.footer-col li { font-size: 0.9375rem; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(0,0,0,0.18);
  font-size: 0.8125rem;
  color: #0f2630;
}
.footer-bottom a { color: #0f2630; }
@media (max-width: 520px) {
  .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
}

/* ---------- Page header (non-home pages) ---------- */
.page-header {
  background: var(--color-surface);
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--color-line);
}
.page-header h1 { margin-bottom: 0.5rem; }
.page-header p { font-size: 1.125rem; max-width: 60ch; margin: 0; }

/* ---------- Utilities ---------- */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.text-center { text-align: center; }