/* Atlo Tech LLC — single stylesheet
   Palette: charcoal, white, one warm-neutral accent. */

:root {
  --charcoal: #1c1c1a;
  --ink: #2c2c29;
  --paper: #ffffff;
  --paper-warm: #f5f4f0;
  --line: #e4e2dc;
  --line-dark: #3a3a36;
  --muted: #6f6c65;
  --accent: #9a8a6e;        /* warm neutral accent, used sparingly */

  --max: 1040px;
  --measure: 40rem;

  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

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

a {
  color: var(--charcoal);
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 400;
  color: var(--charcoal);
  letter-spacing: -0.01em;
}

/* Layout ------------------------------------------------------------ */

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 2rem;
}

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

.site-header {
  border-top: 3px solid var(--charcoal);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 1.6rem;
  padding-bottom: 1.6rem;
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.3rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--charcoal);
}

.site-header nav a {
  margin-left: 1.8rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.15s ease;
}

.site-header nav a:hover {
  color: var(--charcoal);
}

.site-header nav a[aria-current="page"] {
  color: var(--charcoal);
}

/* Shared bits ------------------------------------------------------- */

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.lead {
  max-width: var(--measure);
  color: var(--muted);
  font-size: 1.06rem;
}

.btn {
  display: inline-block;
  margin-top: 2rem;
  padding: 0.85rem 1.9rem;
  background: var(--charcoal);
  color: var(--paper);
  border: 1px solid var(--charcoal);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.btn:hover {
  background: var(--paper);
  color: var(--charcoal);
}

.btn--light {
  background: var(--paper);
  color: var(--charcoal);
  border-color: var(--paper);
}

.btn--light:hover {
  background: transparent;
  color: var(--paper);
}

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

.hero {
  padding: 6.5rem 0 5rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 1.4rem + 4.6vw, 4.4rem);
  line-height: 1.08;
}

.hero .lead {
  margin-top: 1.6rem;
}

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

.services {
  padding: 4rem 0 5.5rem;
  border-top: 1px solid var(--line);
}

.services h2 {
  margin: 0 0 2.5rem;
  font-size: 1.9rem;
}

.service-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.service {
  display: flex;
  gap: 1.75rem;
  padding: 2.25rem 0;
  border-top: 1px solid var(--line);
}

.service:last-child {
  border-bottom: 1px solid var(--line);
}

.service-num {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--accent);
  padding-top: 0.35rem;
  min-width: 1.6rem;
  transition: color 0.2s ease;
}

.service:hover .service-num {
  color: var(--charcoal);
}

.service-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.4rem;
}

.service-body p {
  margin: 0;
  max-width: var(--measure);
  color: var(--muted);
}

/* Approach ---------------------------------------------------------- */

.approach {
  padding: 5rem 0;
  background: var(--paper-warm);
  border-top: 1px solid var(--line);
}

.approach h2 {
  margin: 0 0 0.5rem;
  font-size: 1.9rem;
}

.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.25rem;
  margin-top: 2.5rem;
}

.approach-item {
  border-top: 2px solid var(--charcoal);
  padding-top: 1.15rem;
}

.approach-item h3 {
  margin: 0 0 0.55rem;
  font-size: 1.2rem;
  transition: color 0.2s ease;
}

.approach-item:hover h3 {
  color: var(--accent);
}

.approach-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* Call to action ---------------------------------------------------- */

.cta {
  padding: 5.5rem 0;
  background: var(--charcoal);
  color: var(--paper);
}

.cta h2 {
  margin: 0;
  color: var(--paper);
  font-size: clamp(1.9rem, 1.2rem + 2.6vw, 2.9rem);
  line-height: 1.12;
}

.cta-lead {
  max-width: 34rem;
  margin: 1.2rem 0 0;
  color: #b5b3ab;
}

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

.contact {
  padding: 6rem 0;
}

.contact h1 {
  margin: 0;
  font-size: clamp(2.4rem, 1.6rem + 3vw, 3.4rem);
  line-height: 1.1;
}

.contact .lead {
  margin-top: 1.4rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 3.5rem;
  margin-top: 3rem;
}

.field {
  margin-bottom: 1.6rem;
}

.field label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.75rem 0.85rem;
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 0;
}

.field textarea {
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--charcoal);
  box-shadow: inset 0 0 0 1px var(--charcoal);
}

.contact-form .btn {
  margin-top: 0.5rem;
}

.form-status {
  align-self: start;
  margin: 0;
  padding: 1.4rem 1.5rem;
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-left: 3px solid var(--charcoal);
  color: var(--ink);
  font-size: 1rem;
}

.form-status:focus {
  outline: none;
}

.contact-aside {
  border-top: 2px solid var(--charcoal);
  padding-top: 1.5rem;
}

.contact-block + .contact-block {
  margin-top: 2rem;
}

.contact-block h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.contact-block p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

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

.site-footer {
  background: var(--charcoal);
  color: #b5b3ab;
  padding: 3.5rem 0 2.25rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid var(--line-dark);
}

.footer-brand .wordmark {
  color: var(--paper);
}

.footer-brand p {
  margin: 0.55rem 0 0;
  font-size: 0.92rem;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
  font-size: 0.88rem;
}

.footer-meta a {
  color: #b5b3ab;
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-meta a:hover {
  color: var(--paper);
}

.footer-meta nav a {
  margin-left: 1.4rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 1.75rem;
  font-size: 0.8rem;
  color: #8b8980;
}

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

@media (max-width: 760px) {
  .approach-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .container {
    padding: 0 1.4rem;
  }

  .hero {
    padding: 4rem 0 3.5rem;
  }

  .services {
    padding: 3rem 0 4rem;
  }

  .approach,
  .cta {
    padding: 3.5rem 0;
  }

  .contact {
    padding: 3.5rem 0;
  }

  .service {
    gap: 1.1rem;
  }

  .footer-meta {
    align-items: flex-start;
  }

  .footer-meta nav a {
    margin-left: 0;
    margin-right: 1.4rem;
  }
}

/* Scroll reveal ----------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal:nth-child(2) { transition-delay: 0.07s; }
.reveal:nth-child(3) { transition-delay: 0.14s; }
.reveal:nth-child(4) { transition-delay: 0.21s; }

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}