/* ============================================================
   True Line Company — Public Site Stylesheet
   Palette: Classic Blue (deep navy + steel + crisp white)
   ============================================================ */

:root {
  /* Color palette */
  --color-primary:        #0A2540;   /* deep navy */
  --color-primary-dark:   #061A2E;
  --color-primary-light:  #1B3A5C;
  --color-accent:         #2563EB;   /* electric blue for links/CTAs */
  --color-accent-dark:    #1D4ED8;
  --color-text:           #1F2937;
  --color-text-light:     #6B7280;
  --color-text-on-dark:   #E2E8F0;
  --color-bg:             #FFFFFF;
  --color-bg-alt:         #F9FAFB;
  --color-bg-quote:       #F1F5F9;
  --color-border:         #E5E7EB;
  --color-border-strong:  #CBD5E1;
  --color-success:        #047857;
  --color-error:          #B91C1C;

  /* Type */
  --font-serif:  Georgia, 'Times New Roman', 'Liberation Serif', serif;
  --font-sans:   -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 'Helvetica Neue', Arial, sans-serif;
  --font-mono:   ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* Layout */
  --container:    1100px;
  --container-narrow: 760px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --radius:   4px;
  --shadow-sm: 0 1px 2px rgba(10,37,64,0.06);
  --shadow-md: 0 4px 12px rgba(10,37,64,0.08);
}

/* Reset / base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--color-accent-dark); }
button { font: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  line-height: 1.2;
  margin: 0 0 var(--space-sm);
  font-weight: 700;
}
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 2.8vw, 2rem); margin-top: var(--space-lg); }
h3 { font-size: 1.25rem; margin-top: var(--space-md); }
p  { margin: 0 0 var(--space-sm); }

/* Skip link for accessibility */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--color-primary); color: #fff;
  padding: 0.5rem 1rem; z-index: 100;
}
.skip-link:focus { left: 0; }

/* Container */
.container { max-width: var(--container); margin: 0 auto; padding: 0 1.25rem; }
.container.narrow { max-width: var(--container-narrow); }

/* ============================================================
   Header / nav
   ============================================================ */
.site-header {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  border-bottom: 3px solid var(--color-accent);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem;
  max-width: var(--container); margin: 0 auto;
  flex-wrap: wrap; gap: 1rem;
}
.site-brand { display: flex; align-items: center; gap: 0.85rem; text-decoration: none; color: inherit; }
.site-brand__mark {
  width: 48px; height: 48px;
  background: var(--color-bg);
  color: var(--color-primary);
  font-family: var(--font-serif);
  font-weight: 700; font-size: 1.5rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 2px;
  letter-spacing: -0.05em;
  flex-shrink: 0;
}
.site-brand__name { font-family: var(--font-serif); font-size: 1.15rem; font-weight: 700; line-height: 1.1; }
.site-brand__tag  { font-size: 0.78rem; color: var(--color-text-on-dark); opacity: 0.8; letter-spacing: 0.05em; text-transform: uppercase; }

.site-nav { display: flex; align-items: center; gap: 0.25rem; flex-wrap: wrap; }
.site-nav a {
  color: var(--color-text-on-dark);
  text-decoration: none;
  padding: 0.5rem 0.85rem;
  font-size: 0.98rem;
  border-radius: 2px;
  transition: background-color 120ms;
}
.site-nav a:hover, .site-nav a[aria-current="page"] {
  background: var(--color-primary-light);
  color: #fff;
}
.nav-toggle { display: none; }

@media (max-width: 720px) {
  .site-header__inner { flex-direction: column; align-items: flex-start; }
  .nav-toggle {
    display: inline-block; background: transparent; color: #fff;
    border: 1px solid var(--color-text-on-dark);
    padding: 0.4rem 0.75rem; align-self: flex-end;
    margin-top: -2.5rem;
  }
  .site-nav { display: none; width: 100%; flex-direction: column; align-items: stretch; }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 0.6rem 0.85rem; }
}

/* ============================================================
   Hero (homepage)
   ============================================================ */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-text-on-dark);
  padding: var(--space-xl) 1.25rem;
}
.hero__inner { max-width: var(--container); margin: 0 auto; text-align: center; }
.hero h1 { color: #fff; font-size: clamp(2rem, 5vw, 3.5rem); margin-bottom: var(--space-sm); }
.hero__sub { font-size: 1.15rem; max-width: 38rem; margin: 0 auto var(--space-md); opacity: 0.92; }
.hero__cta { display: inline-flex; gap: 0.75rem; flex-wrap: wrap; justify-content: center; margin-top: var(--space-md); }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--color-accent);
  transition: background-color 120ms, border-color 120ms;
  cursor: pointer;
}
.btn:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: #fff; }
.btn--ghost { background: transparent; color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,0.1); color: #fff; }

/* ============================================================
   Sections
   ============================================================ */
section { padding: var(--space-xl) 0; }
section.alt { background: var(--color-bg-alt); }
section h2 { margin-top: 0; }
.eyebrow {
  text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.85rem;
  color: var(--color-accent); font-weight: 600; margin-bottom: 0.5rem;
}

/* Quote block */
.quote {
  background: var(--color-bg-quote);
  border-left: 4px solid var(--color-accent);
  padding: 1.5rem 1.75rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  margin: var(--space-md) 0;
  color: var(--color-primary);
}
.quote__cite { display: block; margin-top: 0.5rem; font-size: 0.95rem; font-style: normal; color: var(--color-text-light); }

/* Motto callout */
.motto {
  text-align: center;
  padding: var(--space-lg) 1.25rem;
  background: var(--color-primary);
  color: #fff;
}
.motto__text { font-family: var(--font-serif); font-size: clamp(1.15rem, 2.5vw, 1.6rem); font-style: italic; max-width: 50rem; margin: 0 auto 0.5rem; }
.motto__cite { font-size: 0.95rem; opacity: 0.85; }

/* Service grid */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; }
.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform 120ms, box-shadow 120ms, border-color 120ms;
}
.service-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--color-accent); }
.service-card h3 { color: var(--color-primary); margin-top: 0; font-size: 1.1rem; }
.service-card p  { color: var(--color-text-light); font-size: 0.95rem; margin-bottom: 0; }

/* ============================================================
   About page
   ============================================================ */
.about-hero {
  display: grid; grid-template-columns: 1fr 2fr; gap: var(--space-lg);
  align-items: start;
}
@media (max-width: 720px) { .about-hero { grid-template-columns: 1fr; } }
.about-hero img {
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}
.about-meta dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.5rem 1rem; margin: var(--space-sm) 0; }
.about-meta dt { font-weight: 600; color: var(--color-primary); }
.about-meta dd { margin: 0; }

.projects-list { columns: 2; column-gap: 2rem; margin-top: var(--space-md); }
@media (max-width: 720px) { .projects-list { columns: 1; } }
.projects-list h4 {
  break-after: avoid; margin-top: 1.25rem; color: var(--color-accent);
  font-family: var(--font-sans); font-size: 0.85rem; text-transform: uppercase;
  letter-spacing: 0.08em;
}
.projects-list ul { padding-left: 1.25rem; margin: 0.25rem 0 0.5rem; font-size: 0.95rem; }
.projects-list li { margin-bottom: 0.25rem; }

/* ============================================================
   FAQ
   ============================================================ */
.faq details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  background: var(--color-bg);
  overflow: hidden;
}
.faq summary {
  cursor: pointer; padding: 1rem 1.25rem; font-weight: 600;
  color: var(--color-primary); list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.5rem; color: var(--color-accent); margin-left: 1rem; flex-shrink: 0; }
.faq details[open] summary::after { content: "−"; }
.faq details[open] summary { background: var(--color-bg-alt); border-bottom: 1px solid var(--color-border); }
.faq__answer { padding: 1rem 1.25rem; color: var(--color-text); }
.faq__answer h4 { color: var(--color-primary); margin-top: 1rem; font-size: 1rem; font-family: var(--font-sans); }

/* ============================================================
   Contact
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: 2fr 1fr; gap: var(--space-lg); }
@media (max-width: 720px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info { background: var(--color-bg-alt); padding: 1.5rem; border-radius: var(--radius); border: 1px solid var(--color-border); }
.contact-info h3 { margin-top: 0; }
.contact-info p { margin: 0.4rem 0; }
.contact-info a { color: var(--color-primary); }

.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.4rem; color: var(--color-primary); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  font: inherit;
  background: #fff;
  color: var(--color-text);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: 2px solid var(--color-accent); outline-offset: 1px;
  border-color: var(--color-accent);
}
.form-group textarea { resize: vertical; min-height: 8rem; }
.form-group small { display: block; color: var(--color-text-light); font-size: 0.85rem; margin-top: 0.25rem; }
.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

#form-status {
  margin-top: 1rem; padding: 0.85rem 1rem; border-radius: var(--radius);
  display: none;
}
#form-status.success { display: block; background: #ECFDF5; color: var(--color-success); border-left: 4px solid var(--color-success); }
#form-status.error   { display: block; background: #FEF2F2; color: var(--color-error);   border-left: 4px solid var(--color-error); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-primary-dark);
  color: var(--color-text-on-dark);
  padding: var(--space-lg) 1.25rem 1.5rem;
  margin-top: var(--space-xl);
}
.site-footer__inner {
  max-width: var(--container); margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem;
}
@media (max-width: 720px) { .site-footer__inner { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-family: var(--font-sans); font-size: 1rem; text-transform: uppercase; letter-spacing: 0.08em; margin-top: 0; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 0.35rem 0; }
.site-footer a { color: var(--color-text-on-dark); text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer__bottom { max-width: var(--container); margin: var(--space-md) auto 0; padding-top: var(--space-md); border-top: 1px solid var(--color-primary-light); font-size: 0.85rem; opacity: 0.75; text-align: center; }

/* Utility */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.lead { font-size: 1.15rem; color: var(--color-text-light); max-width: 38rem; }