/* Atomar, LLC — Corporate website styles */

:root {
  --color-bg: #f7f6f3;
  --color-bg-elevated: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #5a5a5a;
  --color-text-subtle: #8a8a8a;
  --color-accent: #005b88;
  --color-accent-hover: #00466a;
  --color-border: #e4e2dd;
  --color-border-strong: #d0cec8;

  --font-sans: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-2xl: 5.5rem;
  --space-3xl: 8rem;

  --max-width: 68rem;
  --max-prose: 38rem;
  --header-height: 4.25rem;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--color-accent-hover);
}

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

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--space-md);
  top: -100%;
  z-index: 1000;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.875rem;
}

.skip-link:focus {
  top: var(--space-sm);
}

/* Layout */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner,
.footer-inner,
.section-inner {
  width: min(100% - 2.5rem, var(--max-width));
  margin-inline: auto;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  line-height: 0;
}

.logo img,
.logo svg {
  height: 1.5rem;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav a {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  padding: 0.4rem 0.75rem;
  border-radius: 2px;
  transition: color 0.2s var(--ease);
}

.nav a:hover {
  color: var(--color-text);
}

.nav a[aria-current="page"] {
  color: var(--color-text);
  box-shadow: inset 0 -1px 0 var(--color-accent);
}

.nav-toggle {
  display: none;
  appearance: none;
  background: none;
  border: 1px solid var(--color-border-strong);
  border-radius: 2px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  cursor: pointer;
  color: var(--color-text);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-toggle-bars {
  display: block;
  width: 1rem;
  height: 1px;
  margin: 0 auto;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}

main {
  flex: 1;
}

/* Hero */
.hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.hero-inner {
  width: min(100% - 2.5rem, var(--max-width));
  margin-inline: auto;
  max-width: 42rem;
}

.hero h1 {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--color-text);
}

.hero .lede {
  margin: 0 0 var(--space-lg);
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-text-muted);
  max-width: 34rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.01em;
}

.text-link::after {
  content: "→";
  transition: transform 0.25s var(--ease);
}

.text-link:hover::after {
  transform: translateX(3px);
}

/* Sections */
.section {
  padding: var(--space-2xl) 0;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

.section-label {
  margin: 0 0 var(--space-sm);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section h2 {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.section p {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
  max-width: var(--max-prose);
}

.section p:last-child {
  margin-bottom: 0;
}

.overview {
  padding-bottom: var(--space-3xl);
}

.overview .section-inner {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .overview .section-inner {
    grid-template-columns: 1fr 1.15fr;
    align-items: start;
    gap: var(--space-2xl);
  }
}

/* Principles */
.principles {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.principles-intro {
  margin-bottom: var(--space-xl);
}

.principles-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .principles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.principle {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .principle {
    padding: var(--space-lg) var(--space-lg) var(--space-lg) 0;
    border-bottom: none;
    border-right: 1px solid var(--color-border);
  }

  .principle:first-child {
    padding-left: 0;
  }

  .principle:last-child {
    border-right: none;
    padding-right: 0;
  }

  .principle:not(:first-child) {
    padding-left: var(--space-lg);
  }
}

.principle h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.principle p {
  margin: 0;
  font-size: 0.975rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  max-width: none;
}

/* Page hero (inner pages) */
.page-hero {
  padding: var(--space-2xl) 0 var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.page-content {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.page-content .prose {
  max-width: var(--max-prose);
}

.page-content .prose p {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

.page-content .prose p:last-child {
  margin-bottom: 0;
}

/* Contact */
.contact-block {
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  max-width: 22rem;
}

.contact-block address {
  font-style: normal;
  color: var(--color-text);
  line-height: 1.8;
}

.contact-block .org {
  font-weight: 500;
  margin-bottom: 0.15rem;
}

.contact-block .locale {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.contact-block a {
  font-weight: 500;
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  background: var(--color-bg);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.copyright {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
}

.footer-nav {
  display: flex;
  gap: var(--space-md);
}

.footer-nav a {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer-nav a:hover {
  color: var(--color-text);
}

/* Reveal animation — minimal */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(0.6rem);
    animation: reveal 0.7s var(--ease) forwards;
  }

  .reveal-delay-1 { animation-delay: 0.08s; }
  .reveal-delay-2 { animation-delay: 0.16s; }
  .reveal-delay-3 { animation-delay: 0.24s; }

  @keyframes reveal {
    to {
      opacity: 1;
      transform: none;
    }
  }
}

/* Mobile nav */
@media (max-width: 640px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-sm);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.75rem 1rem;
  }

  .hero {
    padding: var(--space-2xl) 0 var(--space-xl);
  }

  .header-inner,
  .footer-inner,
  .section-inner,
  .hero-inner,
  .page-hero .section-inner,
  .page-content .section-inner {
    width: min(100% - 1.75rem, var(--max-width));
  }
}