/* ============================================
   Design System — Lokose Services Group
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-navy:       #0a2540;
  --color-navy-light: #163a5f;
  --color-navy-dark:  #061a2e;
  --color-white:      #ffffff;
  --color-off-white:  #f7f8fa;
  --color-gray-100:   #eef0f3;
  --color-gray-200:   #d4d8df;
  --color-gray-400:   #8a919c;
  --color-gray-600:   #4a5261;
  --color-gray-800:   #2c3240;
  --color-accent:     #c8922a;
  --color-accent-dark:#a87720;
  --color-accent-light:#e8c47a;

  /* Typography */
  --font-heading: 'Merriweather', Georgia, 'Times New Roman', serif;
  --font-body:    'Source Sans 3', 'Segoe UI', Roboto, Arial, sans-serif;

  /* Font sizes — fluid scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --container-max: 1140px;
  --container-pad: 1.5rem;
  --header-h: 72px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(10, 37, 64, 0.08);
  --shadow-md:  0 4px 12px rgba(10, 37, 64, 0.1);
  --shadow-lg:  0 8px 24px rgba(10, 37, 64, 0.12);

  /* Borders */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;

  /* Transitions */
  --transition: 200ms ease;
}


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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font: inherit;
}


/* --- Focus States (Accessibility) --- */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}


/* --- Skip Link (Accessibility) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 200;
}

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


/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}


/* --- Base Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-navy);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl);  }

p {
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-600);
  max-width: 640px;
}


/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  box-shadow: var(--shadow-sm);
}

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

.logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 900;
  color: var(--color-navy);
}

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

.nav-list a {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}

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

.nav-cta {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-accent);
  color: var(--color-white) !important;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition);
}

.nav-cta:hover {
  background-color: var(--color-accent-dark);
}

/* Mobile nav toggle — hidden on desktop */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-navy);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* Hamburger → X animation */
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* --- Sections — shared rhythm --- */
section {
  padding-block: var(--space-4xl);
}

section:nth-child(even) {
  background-color: var(--color-off-white);
}

section h2 {
  margin-bottom: var(--space-md);
}

section .section-subtitle {
  margin-bottom: var(--space-2xl);
}


/* --- Hero --- */
.hero {
  background-color: var(--color-navy);
  color: var(--color-white);
  padding-block: var(--space-4xl);
  text-align: center;
}

.hero-tagline {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-light);
  margin-bottom: var(--space-lg);
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-gray-200);
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
}

.hero-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-200);
  margin-bottom: var(--space-2xl);
  letter-spacing: 0.02em;
}

.hero-meta-divider {
  color: var(--color-gray-400);
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}


/* --- Certifications --- */
.certifications {
  text-align: center;
}

.certifications h2 {
  margin-bottom: var(--space-2xl);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.cert-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  padding: var(--space-xl) var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
  text-align: center;
}

.cert-card:hover {
  box-shadow: var(--shadow-md);
}

.cert-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: #edf3f0;
  color: #2a7d4f;
  margin-bottom: var(--space-md);
}

.cert-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-sm);
}

.cert-desc {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: 1.5;
  margin-bottom: 0;
}


/* --- Capabilities --- */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.cap-card {
  display: flex;
  flex-direction: column;
}

.cap-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: rgba(200, 146, 42, 0.1);
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.cap-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-md);
}

.cap-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.cap-list li {
  position: relative;
  padding-left: var(--space-lg);
  font-size: var(--text-base);
  color: var(--color-gray-600);
  line-height: 1.5;
}

.cap-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* NAICS codes */
.naics-section {
  margin-top: var(--space-3xl);
  text-align: center;
}

.naics-heading {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-lg);
}

.naics-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

.naics-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.4rem 0.9rem;
  font-size: var(--text-sm);
  color: var(--color-navy);
  background-color: var(--color-gray-100);
  border-radius: 100px;
  white-space: nowrap;
}

.naics-pill strong {
  color: var(--color-accent-dark);
  font-weight: 700;
}


/* --- Why Choose Us --- */
.why-us h2 {
  margin-bottom: var(--space-2xl);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.why-item {
  display: flex;
  flex-direction: column;
  padding: var(--space-xl);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.why-item:hover {
  box-shadow: var(--shadow-md);
}

.why-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(10, 37, 64, 0.06);
  color: var(--color-navy);
  margin-bottom: var(--space-md);
}

.why-item h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.why-item p {
  font-size: var(--text-base);
  color: var(--color-gray-600);
  line-height: 1.6;
  margin-bottom: 0;
}


/* --- Past Performance --- */
.past-performance .section-subtitle {
  max-width: 780px;
}

.performance-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.perf-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.perf-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-dark);
  background-color: rgba(200, 146, 42, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  align-self: flex-start;
}

.perf-client {
  font-size: var(--text-lg);
  margin-bottom: 0;
}

.perf-service {
  color: var(--color-gray-600);
  margin-bottom: 0;
}

.perf-outcome {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  margin-bottom: 0;
}

.perf-references {
  margin-top: var(--space-2xl);
  font-style: italic;
  color: var(--color-gray-400);
  text-align: center;
  font-size: var(--text-sm);
}


/* --- Contact --- */
.contact {
  background-color: var(--color-off-white);
}

.contact h2 {
  margin-bottom: var(--space-sm);
}

.contact .section-subtitle {
  margin-bottom: var(--space-2xl);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-info h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-row dt {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-gray-400);
  margin-bottom: var(--space-xs);
}

.contact-row dd {
  color: var(--color-gray-800);
  line-height: 1.5;
}

.contact-row a {
  color: var(--color-navy);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

.contact-row a:hover {
  color: var(--color-accent-dark);
}

/* Contact form */
.contact-form {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
}

.required {
  color: var(--color-accent-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: var(--text-base);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus-visible,
.form-group select:focus-visible,
.form-group textarea:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(200, 146, 42, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234a5261' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
  cursor: pointer;
}

.btn-submit {
  width: 100%;
  padding-block: 0.85rem;
  font-size: var(--text-base);
  cursor: pointer;
  border: none;
}


/* --- Footer --- */
.site-footer {
  background-color: var(--color-navy-dark);
  color: var(--color-gray-200);
  padding-block: var(--space-2xl);
  text-align: center;
  font-size: var(--text-sm);
}

.site-footer p {
  margin-bottom: var(--space-xs);
}

.footer-ids {
  color: var(--color-gray-400);
  font-size: var(--text-xs);
}


/* --- Buttons (shared) --- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-base);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: background-color var(--transition), box-shadow var(--transition);
}

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

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
}


/* --- Cards (shared) --- */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}


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

/* Tablet */
@media (max-width: 768px) {
  :root {
    --text-5xl: 2.25rem;
    --text-3xl: 1.5rem;
    --text-2xl: 1.25rem;
    --header-h: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-md);
    padding: var(--space-lg);
    gap: var(--space-lg);
  }

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

  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .capabilities-grid {
    grid-template-columns: 1fr;
  }

  .performance-grid {
    grid-template-columns: 1fr;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

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

  section {
    padding-block: var(--space-3xl);
  }
}

/* Mobile */
@media (max-width: 480px) {
  :root {
    --text-5xl: 1.875rem;
    --text-3xl: 1.375rem;
    --container-pad: 1rem;
  }

  .hero {
    padding-block: var(--space-3xl);
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .cert-grid {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    flex-direction: column;
    align-items: center;
  }

  .hero-meta-divider {
    display: none;
  }
}