/* ============================================================
   Astea Solutions — base.css
   Shared variables, resets, typography, and utility classes.
   Framework: Bootstrap 5 via CDN + custom overrides.
   ============================================================ */

/* ---- CSS custom properties -------------------------------- */
:root {
  /* Brand colors (from brand guidelines) */
  --color-black:         #000000;   /* Deep Black — brand exact */
  --color-white:         #ffffff;   /* Pure White — brand exact */
  --color-green:         #5ac412;   /* Astea Green — primary brand color */
  --color-purple:        #a438f9;   /* Astea Purple — primary brand color */
  --color-yellow:        #ffde14;   /* Astea Yellow — secondary */
  --color-orange:        #f37703;   /* Astea Orange — secondary */
  --color-blue:          #4266ff;   /* Astea Blue — secondary */

  /* Accent = Astea Green (primary interactive color) */
  --color-accent:        #5ac412;
  --color-accent-dark:   #4aaa0f;   /* darkened green for hover states */

  /* UI greys — supporting only, not brand colors */
  --color-dark:          #0d0d0d;   /* near-black for dark sections */
  --color-dark-mid:      #1a1a1a;
  --color-mid:           #2a2a2a;
  --color-muted:         #6b7280;
  --color-border:        #2a2a2a;
  --color-text:          #000000;   /* body text: brand requires Black or White */
  --color-text-light:    #ffffff;   /* light body text: White */
  --color-text-muted:    #9ca3af;   /* muted labels only */

  /* Typography */
  --font-sans: 'Montserrat', 'Verdana', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing scale */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  3rem;
  --space-xl:  5rem;
  --space-2xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --section-pad:   5rem 0;
  --section-pad-sm: 3rem 0;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ---- Reset & base ----------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul, ol {
  list-style: none;
}

/* ---- Typography ------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-black);
}

h1 { font-size: clamp(2.25rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.125rem; }

p {
  max-width: 72ch;
}

/* ---- Layout helpers --------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section {
  padding: var(--section-pad);
}

.section--sm {
  padding: var(--section-pad-sm);
}

.section--dark {
  background-color: var(--color-dark);
  color: var(--color-text-light);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

.section--mid {
  background-color: var(--color-dark-mid);
  color: var(--color-text-light);
}

.section--mid h1,
.section--mid h2,
.section--mid h3,
.section--mid h4 {
  color: var(--color-white);
}

/* ---- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              transform var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-black);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: var(--color-black);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn--outline:hover {
  background-color: var(--color-white);
  color: var(--color-black);
}

.btn--outline-dark {
  background-color: transparent;
  color: var(--color-black);
  border-color: var(--color-black);
}

.btn--outline-dark:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

/* ---- Nav -------------------------------------------------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

.site-nav.scrolled {
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: var(--space-md);
}

.nav-logo img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  padding: 0.25rem 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  width: 100%;
}

.nav-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background-color: var(--color-black);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Nav toggle open state */
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ---- Footer ----------------------------------------------- */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-text-light);
  padding: var(--space-xl) 0 var(--space-lg);
}

.site-footer h3 {
  color: var(--color-white);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

.site-footer a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--space-lg);
}

.footer-offices h3 {
  color: var(--color-white);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

.footer-office-address {
  font-style: normal;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.footer-office-address + .footer-office-address {
  margin-top: 0.875rem;
}

.footer-office-address strong {
  display: block;
  color: #d1d5db;
  font-size: 0.875rem;
  margin-bottom: 0.1rem;
}

.footer-bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-brand__logo {
  filter: brightness(0) invert(1);
}

.footer-brand__tagline {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #9ca3af;
  max-width: 32ch;
  line-height: 1.65;
}

.footer-brand__email {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: #6b7280;
}

.site-footer nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9rem;
}

/* ---- Scroll reveal ---------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ---- Reduced motion ---------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---- Responsive: mobile nav ------------------------------- */
@media (max-width: 768px) {
  .section {
    padding: 3rem 0;
  }

  .section--sm {
    padding: 1rem 0;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-xs);
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  }

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

  .nav-links a {
    padding: 0.5rem 0;
    font-size: 1rem;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- No-JS warning ---------------------------------------- */
.noscript-warning {
  background: #ffde14;
  color: #000;
  text-align: center;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0;
  width: 100%;
}