/* ============================================================
   Dark Matter Consulting — app.css
   Design reference: https://designsystem.digital.gov/
   ============================================================ */

:root {
  --color-navy:       #1b2a4a;
  --color-navy-dark:  #111d33;
  --color-blue:       #0050d8;
  --color-blue-hover: #0040b0;
  --color-white:      #ffffff;
  --color-gray-light: #f0f4f8;
  --color-gray-mid:   #dde3ea;
  --color-gray-text:  #5c6370;
  --color-success:    #00a91c;
  --color-error:      #d63e04;
  --font-stack:       'Source Sans Pro', 'Helvetica Neue', Helvetica, Roboto, Arial, sans-serif;
  --max-width:        1100px;
  --nav-height:       64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-stack);
  font-size: 1rem;
  line-height: 1.6;
  color: #1b2a4a;
  background: var(--color-white);
}

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

a { color: var(--color-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.25; font-weight: 700; }
h1:focus { outline: none; }

/* ---- Loading screen ---- */
.loading-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--color-navy);
}
.loading-logo { width: 220px; filter: invert(1) brightness(2); opacity: 0.7; }

/* ---- Blazor error UI ---- */
#blazor-error-ui {
  background: var(--color-error);
  color: white;
  padding: 0.75rem 1rem;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: none;
  z-index: 9999;
  font-size: 0.9rem;
}
#blazor-error-ui .reload { color: white; font-weight: bold; margin-left: 0.5rem; }
#blazor-error-ui .dismiss { float: right; cursor: pointer; }

/* ---- Layout utilities ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section { padding: 4rem 0; }
.section-light { background: var(--color-gray-light); }
.section-dark  { background: var(--color-navy); color: var(--color-white); }
.section-dark h2, .section-dark h3 { color: var(--color-white); }

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}
.btn-primary {
  background: var(--color-blue);
  color: var(--color-white);
  border-color: var(--color-blue);
}
.btn-primary:hover {
  background: var(--color-blue-hover);
  border-color: var(--color-blue-hover);
  text-decoration: none;
}
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---- Nav ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: var(--color-navy);
  height: var(--nav-height);
  z-index: 100;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 36px;
  filter: invert(1) brightness(2);
}

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

.nav-links a {
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--color-white); text-decoration: none; }

.nav-cta {
  background: var(--color-blue);
  color: var(--color-white) !important;
  padding: 0.4rem 1.1rem;
  border-radius: 4px;
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--color-blue-hover); }

/* Pure CSS hamburger — hidden on desktop */
.nav-toggle       { display: none; }
.nav-toggle-label { display: none; cursor: pointer; flex-direction: column; gap: 5px; }
.nav-toggle-label span {
  display: block; width: 24px; height: 2px;
  background: var(--color-white); border-radius: 2px;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  background: url('../img/nubula.png') center center / cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--nav-height);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-white);
  max-width: 760px;
  padding: 2rem 1.25rem;
}

.hero-logo {
  width: 280px;
  filter: invert(1) brightness(2);
  margin: 0 auto 2rem;
}

.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  color: var(--color-white);
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.88);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Services ---- */
.section-light h2,
.services-grid h3 { color: var(--color-navy); }

.section h2 {
  font-size: 1.9rem;
  margin-bottom: 2.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--color-blue);
  display: inline-block;
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-mid);
  border-radius: 4px;
  padding: 1.75rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
}

.service-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--color-navy);
}

.service-card p { color: var(--color-gray-text); line-height: 1.65; }

/* ---- About ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.about-text p { margin-bottom: 1rem; color: rgba(255,255,255,0.88); }

.credential-list {
  list-style: none;
  padding: 0;
}
.credential-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.9);
  font-weight: 500;
  padding-left: 1.25rem;
  position: relative;
}
.credential-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-blue);
  font-weight: 700;
}

/* ---- Testimonials ---- */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.testimonial {
  background: var(--color-white);
  border-left: 4px solid var(--color-blue);
  border-radius: 0 4px 4px 0;
  padding: 1.5rem 1.75rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
}

.testimonial p {
  font-size: 1.05rem;
  color: var(--color-navy);
  font-style: italic;
  margin-bottom: 1rem;
  line-height: 1.7;
}

.testimonial footer {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-gray-text);
}

/* ---- Contact ---- */
.contact-intro {
  color: rgba(255,255,255,0.85);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

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

.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: rgba(255,255,255,0.9);
  font-size: 0.95rem;
}

.form-control {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: 1rem;
  font-family: var(--font-stack);
  border: 1px solid var(--color-gray-mid);
  border-radius: 4px;
  background: var(--color-white);
  color: var(--color-navy);
}
.form-control:focus {
  outline: 2px solid var(--color-blue);
  outline-offset: 1px;
  border-color: var(--color-blue);
}

textarea.form-control { resize: vertical; }

.validation-message { color: #f8a; font-size: 0.85rem; margin-top: 0.25rem; }

.alert {
  padding: 0.9rem 1.25rem;
  border-radius: 4px;
  margin-bottom: 1.5rem;
  font-weight: 500;
}
.alert-success { background: #e6f4ea; color: #1a5c28; border: 1px solid #a8d5b5; }
.alert-error   { background: #fce8e0; color: #8c2800; border: 1px solid #f0b8a0; }

.contact-direct h3 { color: rgba(255,255,255,0.9); margin-bottom: 1rem; }

.email-link {
  color: #7eb8ff;
  font-size: 1.1rem;
  font-weight: 600;
  word-break: break-all;
}
.email-link:hover { color: var(--color-white); }

.contact-note {
  margin-top: 1.5rem;
  color: rgba(255,255,255,0.65);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-navy-dark);
  padding: 2rem 0;
  border-top: 3px solid var(--color-blue);
}

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

.footer-logo {
  height: 32px;
  filter: invert(1) brightness(1.5);
  opacity: 0.75;
}

.footer-copy { color: rgba(255,255,255,0.55); font-size: 0.875rem; }

.footer-link { color: rgba(255,255,255,0.6); font-size: 0.875rem; }
.footer-link:hover { color: var(--color-white); text-decoration: none; }

/* ============================================================
   Responsive — Tablet 768px+
   ============================================================ */
@media (min-width: 768px) {
  .services-grid    { grid-template-columns: 1fr 1fr; }
  .testimonials-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid     { grid-template-columns: 2fr 1fr; }
  .about-grid       { grid-template-columns: 3fr 2fr; }
}

/* ============================================================
   Responsive — Desktop 1024px+
   ============================================================ */
@media (min-width: 1024px) {
  .services-grid { grid-template-columns: 1fr 1fr 1fr 1fr; }
}

/* ============================================================
   Mobile nav — hamburger
   ============================================================ */
@media (max-width: 767px) {
  .nav-toggle-label { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--color-navy-dark);
    flex-direction: column;
    padding: 1rem 0;
    gap: 0;
    text-align: center;
  }

  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
  }
  .nav-links a:hover { background: rgba(255,255,255,0.06); }

  .nav-toggle:checked ~ .nav-links { display: flex; }

  .nav-cta { border-radius: 0; padding: 0.75rem 1.25rem !important; }
}