/* =========================================================================
   EllipticBit, LLC — "Tron"-inspired theme
   Deep blues and blacks with cyan circuit glow. Flat, digital aesthetic.
   Layered over Bootstrap; component classes are prefixed with `eb-`.
   ========================================================================= */

:root {
  /* Core palette — deep blues and blacks */
  --eb-black: #04060d;
  --eb-bg: #060a16;
  --eb-bg-2: #0a1226;
  --eb-surface: #0b1430;
  --eb-surface-2: #0f1c3f;
  --eb-border: rgba(60, 140, 255, 0.22);
  --eb-border-strong: rgba(53, 230, 255, 0.45);

  /* Accents */
  --eb-blue: #1f6fe5;
  --eb-blue-deep: #0a2a6b;
  --eb-cyan: #35e6ff;
  --eb-cyan-soft: #8be8ff;

  /* Text */
  --eb-heading: #eaf2ff;
  --eb-text: #cdd9f0;
  --eb-text-muted: #8295b8;

  /* Effects */
  --eb-glow: rgba(53, 230, 255, 0.55);
  --eb-glow-soft: rgba(53, 230, 255, 0.18);

  /* Typography */
  --eb-font-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  --eb-font-mono: 'Cascadia Code', 'Cascadia Mono', ui-monospace, 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
}

html {
  font-size: 14px;
  position: relative;
  min-height: 100%;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
  color: var(--eb-text);
  font-family: var(--eb-font-sans);
  background-color: var(--eb-black);
  background-image:
    radial-gradient(1200px 600px at 50% -10%, rgba(31, 111, 229, 0.20), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(53, 230, 255, 0.10), transparent 55%),
    linear-gradient(180deg, var(--eb-bg-2) 0%, var(--eb-bg) 40%, var(--eb-black) 100%);
  background-attachment: fixed;
}

/* Faint circuit grid overlaying the whole page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(53, 230, 255, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(53, 230, 255, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
}

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

.eb-display {
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.05;
  text-transform: uppercase;
}

.eb-eyebrow {
  font-family: var(--eb-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.32em;
  font-size: 0.8rem;
  color: var(--eb-cyan);
}

.eb-text-cyan { color: var(--eb-cyan); }
.eb-muted { color: var(--eb-text-muted); }

a {
  color: var(--eb-cyan-soft);
  text-decoration: none;
  transition: color 0.18s ease, text-shadow 0.18s ease;
}

a:hover {
  color: var(--eb-cyan);
  text-shadow: 0 0 8px var(--eb-glow);
}

code {
  font-family: var(--eb-font-mono);
  color: var(--eb-cyan-soft);
}

/* ------------------------------ Focus states ------------------------------ */
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus,
.form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.15rem rgba(53, 230, 255, 0.35);
  outline: none;
}

/* --------------------------------- Navbar --------------------------------- */
.eb-navbar {
  background: rgba(6, 10, 22, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--eb-border);
  box-shadow: 0 1px 0 0 var(--eb-glow-soft), 0 8px 30px rgba(0, 0, 0, 0.45);
}

.eb-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--eb-font-mono);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--eb-heading) !important;
  text-transform: uppercase;
}

.eb-brand:hover { text-shadow: 0 0 10px var(--eb-glow); }

.eb-brand-mark {
  height: 32px;
  width: 32px;
  filter: drop-shadow(0 0 6px var(--eb-glow-soft));
}

.eb-navbar .nav-link {
  color: var(--eb-text) !important;
  font-family: var(--eb-font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  position: relative;
  padding: 0.5rem 0.9rem;
}

.eb-navbar .nav-link:hover,
.eb-navbar .nav-link.active {
  color: var(--eb-cyan) !important;
  text-shadow: 0 0 10px var(--eb-glow);
}

.eb-navbar .nav-link.active::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.15rem;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--eb-cyan), transparent);
  box-shadow: 0 0 8px var(--eb-glow);
}

.eb-navbar .navbar-toggler {
  border-color: var(--eb-border-strong);
}

.eb-navbar .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2335e6ff' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* --------------------------------- Layout --------------------------------- */
.eb-main {
  flex: 1 0 auto;
}

.eb-section {
  padding: 3.5rem 0;
}

/* ---------------------------------- Hero ---------------------------------- */
.eb-hero {
  position: relative;
  overflow: hidden;
  padding: 6rem 0 4.5rem;
  border-bottom: 1px solid var(--eb-border);
}

.eb-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--eb-cyan), transparent);
  box-shadow: 0 0 14px var(--eb-glow);
}

.eb-hero-lead {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--eb-text);
  max-width: 60ch;
}

/* --------------------------------- Buttons -------------------------------- */
.eb-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--eb-font-mono);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.7rem 1.5rem;
  border-radius: 4px;
  border: 1px solid var(--eb-border-strong);
  color: var(--eb-cyan);
  background: linear-gradient(180deg, rgba(31, 111, 229, 0.12), rgba(10, 42, 107, 0.12));
  transition: all 0.2s ease;
  cursor: pointer;
}

.eb-btn:hover {
  color: var(--eb-black);
  background: var(--eb-cyan);
  border-color: var(--eb-cyan);
  box-shadow: 0 0 22px var(--eb-glow);
  text-shadow: none;
}

.eb-btn-ghost {
  color: var(--eb-text);
  background: transparent;
  border-color: var(--eb-border);
}

.eb-btn-ghost:hover {
  color: var(--eb-cyan);
  background: rgba(53, 230, 255, 0.06);
  border-color: var(--eb-border-strong);
  box-shadow: 0 0 16px var(--eb-glow-soft);
  text-shadow: 0 0 8px var(--eb-glow);
}

/* Bootstrap primary override for validation/built-in buttons */
.btn-primary {
  --bs-btn-color: var(--eb-black);
  --bs-btn-bg: var(--eb-cyan);
  --bs-btn-border-color: var(--eb-cyan);
  --bs-btn-hover-color: var(--eb-black);
  --bs-btn-hover-bg: var(--eb-cyan-soft);
  --bs-btn-hover-border-color: var(--eb-cyan-soft);
  --bs-btn-active-bg: var(--eb-cyan-soft);
  --bs-btn-active-border-color: var(--eb-cyan-soft);
  font-weight: 600;
}

/* ----------------------------- BuildGrid CTA ------------------------------ */
.eb-cta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.6rem 1.9rem;
  border-radius: 8px;
  border: 1px solid var(--eb-border-strong);
  background:
    radial-gradient(600px 200px at 0% 0%, rgba(53, 230, 255, 0.14), transparent 70%),
    linear-gradient(120deg, rgba(10, 42, 107, 0.55), rgba(11, 20, 48, 0.65));
  box-shadow: 0 0 26px rgba(53, 230, 255, 0.12), inset 0 0 24px rgba(31, 111, 229, 0.08);
}

.eb-cta-title {
  font-family: var(--eb-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0;
}

.eb-cta-sub {
  margin: 0.25rem 0 0;
  color: var(--eb-text-muted);
}

/* -------------------------------- Cards ----------------------------------- */
.eb-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.4rem 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--eb-border);
  background: linear-gradient(180deg, var(--eb-surface), var(--eb-bg));
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.eb-card:hover {
  transform: translateY(-4px);
  border-color: var(--eb-border-strong);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--eb-glow-soft), 0 0 28px var(--eb-glow-soft);
}

.eb-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.eb-card-title {
  font-family: var(--eb-font-mono);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
}

.eb-card-title a { color: var(--eb-heading); }
.eb-card-title a:hover { color: var(--eb-cyan); }

.eb-card-desc {
  color: var(--eb-text-muted);
  margin: 0 0 1rem;
  flex: 1 0 auto;
}

.eb-card-link {
  font-family: var(--eb-font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Language badge */
.eb-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--eb-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--eb-border);
  color: var(--eb-cyan-soft);
  background: rgba(31, 111, 229, 0.10);
  white-space: nowrap;
}

/* ------------------------------- Prose ------------------------------------ */
.eb-prose {
  max-width: 70ch;
  color: var(--eb-text);
  line-height: 1.75;
}

.eb-prose h2 {
  margin-top: 2.2rem;
  font-size: 1.4rem;
}

/* -------------------------------- Forms ----------------------------------- */
.eb-form .form-label {
  font-family: var(--eb-font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--eb-text-muted);
}

.eb-form .form-control {
  background-color: rgba(4, 6, 13, 0.6);
  border: 1px solid var(--eb-border);
  color: var(--eb-heading);
  border-radius: 4px;
}

.eb-form .form-control::placeholder { color: #5d6f92; }

.eb-form .form-control:focus {
  background-color: rgba(4, 6, 13, 0.85);
  border-color: var(--eb-border-strong);
  color: var(--eb-heading);
}

.eb-panel {
  padding: 1.8rem;
  border-radius: 10px;
  border: 1px solid var(--eb-border);
  background: linear-gradient(180deg, var(--eb-surface), var(--eb-bg));
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.eb-alert-success {
  border: 1px solid var(--eb-border-strong);
  background: rgba(53, 230, 255, 0.08);
  color: var(--eb-cyan-soft);
  border-radius: 8px;
  padding: 1rem 1.2rem;
}

.eb-alert-error {
  border: 1px solid rgba(255, 92, 122, 0.5);
  background: rgba(255, 92, 122, 0.08);
  color: #ff9db0;
  border-radius: 8px;
  padding: 1rem 1.2rem;
}

.text-danger, .validation-summary-errors, .field-validation-error {
  color: #ff8aa0 !important;
}

/* -------------------------------- Footer ---------------------------------- */
.eb-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--eb-border);
  background: rgba(4, 6, 13, 0.6);
  color: var(--eb-text-muted);
  padding: 1.6rem 0;
  font-size: 0.9rem;
}

.eb-footer a {
  color: var(--eb-text-muted);
  font-family: var(--eb-font-mono);
  letter-spacing: 0.04em;
}

.eb-footer a:hover { color: var(--eb-cyan); }

.eb-footer .eb-footer-sep { color: var(--eb-border-strong); margin: 0 0.6rem; }