/* =========================================================
   ATMason, Inc. — shared stylesheet
   Design concept: masonry / structural engineering.
   A consultancy that builds enterprise IT, governance, and
   security the way a mason builds a wall — course by course,
   load-bearing, inspected before anyone signs off on it.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,400;8..60,500;8..60,600;8..60,700&family=Inter:wght@400;500;600&display=swap');

:root{
  /* --- color tokens ------------------------------------- */
  --charcoal:      #26241f;   /* reserved for rare high-contrast text/icons only */
  --charcoal-2:    #322f27;
  --charcoal-line: rgba(38,36,31,0.14);

  --limestone:     #fbf9f5;   /* primary light ground — bright, warm white */
  --paper:         #ffffff;   /* raised panels on light ground */
  --stone-line:    rgba(38,36,31,0.11);

  --ink:           #24405c;   /* structural blue — primary accent */
  --ink-deep:      #1a2f45;
  --ink-tint:      #eaf0f5;   /* pale blue wash for feature bands */
  --ink-tint-line: rgba(36,64,92,0.14);

  --accent:        #2f6fed;   /* bright blue — call-to-action / hover accent */
  --accent-deep:   #1f4fb3;
  --accent-tint:   #eaf1ff;
  --accent-line:   rgba(47,111,237,0.35);

  --graphite:      #6e685c;   /* secondary text on light ground */
  --graphite-lt:   #6e685c;   /* kept for compatibility; same as graphite now that dark bands are gone */
  --ink-text:      #201e1a;   /* primary text on light ground */
  --paper-text:    #201e1a;   /* kept for compatibility; text is now always dark-on-light */

  /* --- type ------------------------------------------------ */
  --font-head: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* --- layout ------------------------------------------------ */
  --measure: 40rem;
  --gutter: clamp(1.5rem, 5vw, 4rem);
  --radius: 3px;
}

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

html{ scroll-behavior: smooth; }

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

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

a{ color: inherit; }

h1, h2, h3, h4{
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1{ font-size: clamp(2.4rem, 4.6vw, 3.9rem); font-weight: 600; }
h2{ font-size: clamp(1.7rem, 2.8vw, 2.35rem); }
h3{ font-size: 1.28rem; }

p{ margin: 0 0 1.15em; max-width: var(--measure); }

.lede{
  font-size: 1.18rem;
  color: var(--graphite);
  max-width: 34rem;
}

section p, .card p{ color: var(--graphite); }
.on-dark p, .on-dark .lede{ color: var(--graphite); }

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.container{
  width: 100%;
  max-width: 74rem;
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* .on-dark now names a tinted feature band, not a dark section —
   kept the class name to avoid touching every page's markup. */
.on-dark{ background: var(--ink-tint); color: var(--ink-text); }
.on-dark h1, .on-dark h2, .on-dark h3{ color: var(--ink-deep); }

/* =========================================================
   Navigation
   ========================================================= */

.site-header{
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--stone-line);
}

.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.05rem var(--gutter);
  max-width: 74rem;
  margin: 0 auto;
}

.brand{
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink-text);
}

.brand-seal{
  width: 2.15rem;
  height: 2.15rem;
  flex: none;
}

.brand-name{
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.brand-name span{
  display: block;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--graphite);
  letter-spacing: 0.02em;
  margin-top: 0.1rem;
}

.nav-links{
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a{
  text-decoration: none;
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--ink-text);
  padding: 0.3rem 0.05rem;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s ease;
}

.nav-links a:hover{
  border-bottom-color: var(--accent);
}

.nav-links a[aria-current="page"]{
  font-weight: 700;
  border-bottom-color: var(--ink);
}

.nav-cta{
  background: var(--ink);
  color: var(--paper) !important;
  padding: 0.6rem 1.15rem !important;
  border-radius: var(--radius);
  border-bottom: none !important;
}

.nav-cta:hover{ background: var(--ink-deep); }

/* --- dropdown (About > Approach, Careers) --- */

.nav-item-dropdown{ position: relative; }

.dropdown-menu{
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.4rem;
  background: var(--paper);
  border: 1px solid var(--stone-line);
  border-radius: var(--radius);
  padding: 0.4rem;
  min-width: 10.5rem;
  box-shadow: 0 12px 28px rgba(32,30,26,0.1);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
  z-index: 50;
}

/* Bridges the visual gap between the "About" link and the menu below it —
   without this, moving the mouse straight down crosses dead space that
   isn't part of either element, the hover state drops, and the menu
   closes before a click on Careers/Approach can register. */
.dropdown-menu::before{
  content: "";
  position: absolute;
  top: -0.4rem;
  left: 0;
  right: 0;
  height: 0.4rem;
}

.nav-item-dropdown:hover .dropdown-menu,
.nav-item-dropdown:focus-within .dropdown-menu{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-menu a{
  display: block;
  padding: 0.55rem 0.75rem !important;
  border-bottom: none !important;
  border-radius: 4px;
  font-size: 0.92rem !important;
  font-weight: 500;
  white-space: nowrap;
}

.dropdown-menu a:hover{ background: var(--ink-tint); }

.nav-toggle{
  display: none;
  background: none;
  border: 1px solid var(--stone-line);
  border-radius: var(--radius);
  padding: 0.4rem 0.55rem;
  cursor: pointer;
}

.nav-toggle span{
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink-text);
  margin: 4px 0;
}

/* =========================================================
   Hero + structural diagram
   ========================================================= */

.hero{
  padding: clamp(3rem, 7vw, 6rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.hero .container{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero-actions{
  display: flex;
  gap: 1rem;
  margin-top: 1.8rem;
  flex-wrap: wrap;
}

.btn{
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary{
  background: var(--accent);
  color: var(--paper) !important;
}
.btn-primary:hover{ background: var(--accent-deep); }

.btn-ghost{
  background: transparent;
  color: var(--ink-text) !important;
  border-color: var(--stone-line);
}
.btn-ghost:hover{ border-color: var(--ink); }

.on-dark .btn-ghost{
  color: var(--ink-text) !important;
  border-color: var(--ink-tint-line);
}
.on-dark .btn-ghost:hover{ border-color: var(--ink); }

/* --- icon cards (hero diagram) --- */

.icon-cards{
  display: grid;
  gap: 0.85rem;
}

.icon-card{
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.15rem;
  background: var(--paper);
  border: 1px solid var(--stone-line);
  border-radius: 10px;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.icon-card:hover{
  border-color: var(--accent-line);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(20,40,80,0.08);
}

.icon-card-icon{
  flex: none;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  background: var(--accent-tint);
  color: var(--accent-deep);
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-card-icon svg{ width: 1.35rem; height: 1.35rem; }

.icon-card h4{
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink-text);
  margin: 0 0 0.15rem;
}

.icon-card p{ margin: 0; font-size: 0.88rem; color: var(--graphite); }

@media (prefers-reduced-motion: reduce){
  .icon-card{ transition: none; }
}

/* =========================================================
   Coursed bands (services overview / list)
   ========================================================= */

.band{
  border-top: 1px solid var(--stone-line);
  padding: clamp(3rem, 6vw, 4.5rem) 0;
}

.band.on-dark{ border-top-color: var(--ink-tint-line); }

.band-head{
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.practice-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--stone-line);
  border-left: 1px solid var(--stone-line);
}

.practice-grid--five{
  grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 1080px){
  .practice-grid--five{ grid-template-columns: repeat(3, 1fr); }
}

.practice{
  padding: 1.8rem 1.6rem;
  border-right: 1px solid var(--stone-line);
  border-bottom: 1px solid var(--stone-line);
}

.practice h3{ margin-bottom: 0.5rem; font-size: 1.1rem; }
.practice p{ font-size: 0.95rem; margin-bottom: 0; }
.practice .practice-tag{
  display: block;
  font-size: 0.78rem;
  color: var(--accent-deep);
  font-weight: 600;
  margin-bottom: 0.6rem;
}

/* full-width alternating courses used on services.html */

.course-band{
  border-top: 1px solid var(--stone-line);
  padding: clamp(2.8rem, 6vw, 4rem) 0;
  scroll-margin-top: 5.5rem;
}

.jump-nav{
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.8rem;
}

.jump-nav a{
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--ink-tint-line);
  border-radius: 999px;
  padding: 0.5rem 1.15rem;
  box-shadow: 0 1px 2px rgba(32,30,26,0.06);
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.jump-nav a:hover{
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.course-band .container{
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.course-band:nth-of-type(odd){ background: var(--paper); }
.course-band.on-dark:nth-of-type(odd){ background: var(--ink-tint); }

.course-tag{
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-deep);
  display: block;
  margin-bottom: 0.6rem;
}

.course-band ul{
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.course-band li{
  padding-left: 1.1rem;
  position: relative;
  font-size: 0.97rem;
  color: var(--graphite);
}

.course-band li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--ink);
  border-radius: 1px;
}

/* =========================================================
   About / approach page
   ========================================================= */

.pull{
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.4;
  color: var(--ink-text);
  max-width: 42rem;
  border-left: 3px solid var(--accent);
  padding-left: 1.3rem;
  margin: 2rem 0;
}

.on-dark .pull{ color: var(--ink-deep); }

.two-col{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.stat-row{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
  border-top: 1px solid var(--stone-line);
  padding-top: 2rem;
}

.stat-row .num{
  font-family: var(--font-head);
  font-size: 2.1rem;
  color: var(--ink);
  display: block;
}
.stat-row .label{ font-size: 0.9rem; color: var(--graphite); }
.on-dark .stat-row .num{ color: var(--accent-deep); }

.stat-row--four{ grid-template-columns: repeat(4, 1fr); }
.stat-row--two{ grid-template-columns: repeat(2, 1fr); max-width: 32rem; }

.headshot{
  width: 8rem;
  height: 8rem;
  border-radius: 50%;
  object-fit: cover;
  border: 5px solid #000;
  flex: none;
}
@media (max-width: 900px){
  .stat-row--four{ grid-template-columns: repeat(2, 1fr); }
}

/* =========================================================
   Contact page
   ========================================================= */

.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(2.5rem, 6vw, 4.5rem);
  align-items: start;
}

.contact-detail{
  display: flex;
  gap: 1rem;
  margin-bottom: 1.6rem;
}

.contact-detail h3{ font-size: 1rem; margin-bottom: 0.2rem; }
.contact-detail p{ margin-bottom: 0; font-size: 0.96rem; }

.form-field{
  margin-bottom: 1.3rem;
}

.form-field label{
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.form-field input,
.form-field textarea,
.form-field select{
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.75rem 0.85rem;
  background: var(--paper);
  border: 1px solid var(--stone-line);
  border-radius: var(--radius);
  color: var(--ink-text);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus{
  border-color: var(--ink);
}

.form-field textarea{ resize: vertical; min-height: 8rem; }

.form-note{
  font-size: 0.85rem;
  color: var(--graphite);
  margin-top: 0.8rem;
}

#form-status{
  font-size: 0.92rem;
  margin-top: 1rem;
  display: none;
}
#form-status.visible{ display: block; }

/* =========================================================
   Footer
   ========================================================= */

.site-footer{
  border-top: 1px solid var(--charcoal-line);
  padding: 2.5rem 0;
}

.footer-row{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-row a{ text-decoration: none; }

.footer-links{
  display: flex;
  gap: 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
}

.footer-fine{
  font-size: 0.82rem;
  color: var(--graphite-lt);
}

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 860px){
  .nav-links{
    position: fixed;
    inset: 4.2rem 0 0 0;
    background: var(--limestone);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem var(--gutter);
    gap: 1.4rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
    border-bottom: 1px solid var(--stone-line);
  }
  .nav-links.open{
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-toggle{ display: block; }

  .nav-item-dropdown{ width: 100%; }
  .dropdown-menu{
    position: static;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    box-shadow: none;
    border: none;
    padding: 0.3rem 0 0 1rem;
    margin-top: 0.6rem;
    min-width: 0;
    display: grid;
    gap: 0.6rem;
    background: transparent;
  }
  .dropdown-menu a{ padding: 0 !important; font-size: 0.92rem !important; color: var(--graphite); }
  .dropdown-menu::before{ content: none; }

  .hero .container,
  .course-band .container,
  .two-col,
  .contact-grid{
    grid-template-columns: 1fr;
  }
  .hero .container{
    text-align: left;
  }
  .practice-grid{ grid-template-columns: 1fr 1fr; }
  .stat-row{ grid-template-columns: 1fr; gap: 1.2rem; }
}

@media (max-width: 560px){
  .practice-grid{ grid-template-columns: 1fr; }
  .band-head{ align-items: flex-start; }
}