/* ============================================
   1. CUSTOM PROPERTIES
   ============================================ */

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('assets/fonts/ibm-plex-sans-latin-400-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('assets/fonts/ibm-plex-sans-latin-500-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('assets/fonts/ibm-plex-sans-latin-600-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('assets/fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('assets/fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');
}

:root {
  /* Base: primary, secondary, tertiary */
  --color-bg: #000000;
  --color-bg-surface: #2a0048;
  --color-bg-raised: #2a0048;
  --color-border: #560072;
  --color-border-rgb: 86, 0, 114;
  --color-border-subtle: rgba(var(--color-border-rgb), 0.55);

  --color-text-primary: #f3eaf6;
  --color-text-secondary: #c9b8d3;
  --color-text-tertiary: #9a86a8;

  /* Emphasis & highlights */
  --color-highlight: #800080;
  --color-highlight-rgb: 128, 0, 128;
  --color-accent-dim: #a90072;
  --color-accent-dim-rgb: 169, 0, 114;
  --color-accent: #d50048;
  --color-accent-rgb: 213, 0, 72;
  --color-accent-bright: #ff0000;
  --color-accent-glow: rgba(var(--color-highlight-rgb), 0.35);

  /* Small accent text; the only highlight with AA contrast on black */
  --color-accent-text: #ff0000;

  --color-signal: #ff0000;
  --color-signal-rgb: 255, 0, 0;

  --gradient-highlight: linear-gradient(90deg, var(--color-highlight), var(--color-accent-dim), var(--color-accent), var(--color-accent-bright));

  --font-heading: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --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;
  --text-6xl: 3.75rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 5rem;
  --space-16: 8rem;

  --max-width: 72rem;
  --max-width-narrow: 48rem;
  --gutter: var(--space-5);

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 200ms;
  --duration-base: 400ms;
  --duration-slow: 800ms;
}

/* ============================================
   2. RESET & BASE
   ============================================ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

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

::selection {
  background: rgba(var(--color-accent-rgb), 0.3);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-accent);
  color: #ffffff;
  padding: var(--space-2) var(--space-4);
  border-radius: 4px;
  font-weight: 600;
  z-index: 10001;
  transition: top var(--duration-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
}

.section__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  margin-bottom: var(--space-3);
}

.section__heading {
  font-weight: 600;
  font-size: var(--text-3xl);
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  max-width: 24ch;
}

.section__label--center,
.section__heading--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   4. LAYOUT UTILITIES
   ============================================ */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

/* ============================================
   5a. NAVIGATION
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  display: flex;
  align-items: center;
  transition: background-color var(--duration-base), border-color var(--duration-base);
  border-bottom: 1px solid transparent;
}

.site-header[data-scrolled="true"] {
  background-color: rgba(0, 0, 0, 0.88);
  border-bottom-color: var(--color-border);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

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

.nav__logo {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-text-primary);
  z-index: 1001;
}

.nav__logo-accent {
  color: var(--color-accent-text);
  margin-left: 0.5em;
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
  padding: 4px;
}

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text-primary);
  border-radius: 1px;
  transition: transform var(--duration-base) var(--ease-out-expo),
              opacity var(--duration-fast);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(6.5px) 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(-6.5px) rotate(-45deg);
}

.nav__menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) var(--ease-out-expo),
              visibility var(--duration-base);
}

.nav__menu.is-open {
  opacity: 1;
  visibility: visible;
}

.nav__link {
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast);
  position: relative;
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text-primary);
}

.nav__link--cta {
  color: var(--color-accent-text);
}

.nav__link--cta:hover,
.nav__link--cta.is-active {
  color: var(--color-text-primary);
}

/* ============================================
   5b. BUTTONS
   ============================================ */

.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-5);
  border-radius: 4px;
  transition: all var(--duration-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

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

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

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

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

/* ============================================
   5c. SECTION RULE
   ============================================ */

.section__rule {
  border: none;
  width: 96px;
  height: 2px;
  margin: var(--space-5) 0 var(--space-8);
  background: var(--gradient-highlight);
  -webkit-mask-image: repeating-linear-gradient(90deg, #000 0 12px, transparent 12px 18px);
  mask-image: repeating-linear-gradient(90deg, #000 0 12px, transparent 12px 18px);
}

.section__rule--center {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   6a. HERO
   ============================================ */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 96px;
  padding-bottom: var(--space-12);
  overflow: hidden;
  background:
    radial-gradient(ellipse at 75% 40%, rgba(var(--color-highlight-rgb), 0.28), transparent 60%),
    radial-gradient(ellipse at 10% 100%, rgba(var(--color-border-rgb), 0.35), transparent 55%),
    var(--color-bg);
}

.hero__map {
  position: absolute;
  inset: 72px 0 0;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.35) 30%, #000 65%);
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.35) 30%, #000 65%);
}

.hero__map-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.topology__edge {
  stroke: rgba(var(--color-border-rgb), 0.8);
  stroke-width: 1;
}

.topology__edge--secured {
  stroke: rgba(var(--color-accent-dim-rgb), 0.6);
}

.topology__node {
  fill: var(--color-bg);
  stroke: var(--color-border);
  stroke-width: 1.25;
}

.topology__node--hardened {
  fill: rgba(var(--color-accent-rgb), 0.25);
  stroke: var(--color-accent);
}

.topology__node--flagged {
  fill: rgba(var(--color-signal-rgb), 0.2);
  stroke: var(--color-signal);
}

.topology__halo {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 1;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
}

.topology__halo--flagged {
  stroke: var(--color-signal);
}

.hero__map-scan {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 160px;
  background: linear-gradient(90deg, transparent, rgba(var(--color-highlight-rgb), 0.12) 85%, rgba(var(--color-accent-rgb), 0.35) 100%);
  border-right: 1px solid rgba(var(--color-signal-rgb), 0.45);
  animation: scanSweep 9s linear infinite;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  margin-bottom: var(--space-5);
}

.hero__eyebrow::before {
  content: '> ';
  color: var(--color-text-tertiary);
}

.hero__title {
  font-weight: 600;
  font-size: clamp(var(--text-4xl), 7vw, var(--text-6xl));
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 18ch;
  text-wrap: balance;
  margin-bottom: var(--space-5);
}

.hero__lede {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 38rem;
  margin-bottom: var(--space-8);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.hero__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-text-tertiary);
}

.hero__status-nowrap {
  white-space: nowrap;
}

.hero__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-bright);
  box-shadow: 0 0 0 3px rgba(var(--color-signal-rgb), 0.22);
  animation: statusPulse 2.4s ease-in-out infinite;
}

/* ============================================
   6b. ABOUT
   ============================================ */

.about__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.about__bio p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}

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

.about__bio .about__lede {
  font-size: var(--text-xl);
  line-height: 1.6;
  color: var(--color-text-primary);
}

.about__quick-facts {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-left: 2px solid var(--color-accent);
  border-radius: 4px;
  padding: var(--space-6);
}

.about__quick-facts dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-text);
  margin-bottom: var(--space-1);
}

.about__quick-facts dd {
  font-size: var(--text-base);
  color: var(--color-text-primary);
  margin-bottom: var(--space-5);
}

.about__quick-facts dd:last-of-type {
  margin-bottom: 0;
}

/* ============================================
   6c. SERVICES
   ============================================ */

.services {
  background: var(--color-bg-surface);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.services__intro {
  max-width: 44rem;
  margin-bottom: var(--space-8);
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  line-height: 1.7;
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.service-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--space-6);
  transition: border-color var(--duration-fast),
              box-shadow var(--duration-fast);
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 30px var(--color-accent-glow);
}

.service-card__icon {
  color: var(--color-accent);
  margin-bottom: var(--space-5);
}

.service-card__eyebrow {
  margin-bottom: var(--space-2);
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.service-card__title {
  font-weight: 600;
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.service-card__description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.service-card__included {
  margin-top: auto;
  padding-top: var(--space-5);
}

.service-card__included li {
  position: relative;
  padding: var(--space-2) 0 var(--space-2) var(--space-5);
  border-top: 1px solid var(--color-border-subtle);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.service-card__included li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 50%;
  width: 6px;
  height: 6px;
  border: 1px solid var(--color-accent);
  transform: translateY(-50%) rotate(45deg);
}

/* ============================================
   6d. APPROACH
   ============================================ */

.approach__steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.approach-step {
  position: relative;
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.approach-step::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--gradient-highlight);
}

.approach-step__number {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent-text);
  margin-bottom: var(--space-3);
}

.approach-step__title {
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.approach-step__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================
   6e. CONTACT
   ============================================ */

.contact {
  background: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
}

.contact__lede {
  text-align: center;
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 44ch;
  margin: 0 auto var(--space-8);
}

.contact__methods {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  max-width: 36rem;
  margin: 0 auto;
}

.contact__method {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: var(--space-5);
  transition: border-color var(--duration-fast);
  text-align: center;
}

.contact__method:hover {
  border-color: var(--color-accent);
}

.contact__method-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-text);
}

.contact__method-value {
  font-size: var(--text-base);
  color: var(--color-text-primary);
  overflow-wrap: anywhere;
}

/* ============================================
   6f. FOOTER
   ============================================ */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-6) 0;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer__copyright,
.site-footer__location {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* ============================================
   6g. ERROR PAGE
   ============================================ */

.error-page {
  min-height: 100svh;
  display: flex;
  align-items: center;
}

.error-page__code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-signal);
  margin-bottom: var(--space-4);
}

.error-page__title {
  font-weight: 600;
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.error-page__text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

/* ============================================
   7. ANIMATIONS & TRANSITIONS
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes scanSweep {
  from { transform: translateX(-160px); }
  to { transform: translateX(100vw); }
}

@keyframes statusPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(var(--color-signal-rgb), 0.22); }
  50% { box-shadow: 0 0 0 6px rgba(var(--color-signal-rgb), 0.05); }
}

@keyframes haloPing {
  0% { opacity: 0.7; transform: scale(1); }
  70%, 100% { opacity: 0; transform: scale(3.2); }
}

/* ============================================
   8. MEDIA QUERIES
   ============================================ */

@media (min-width: 640px) {
  .services__grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (min-width: 960px) {
  :root {
    --gutter: var(--space-8);
  }

  .site-header {
    height: 72px;
  }

  .nav__toggle {
    display: none;
  }

  .nav__menu {
    position: static;
    flex-direction: row;
    background: none;
    opacity: 1;
    visibility: visible;
    gap: var(--space-6);
  }

  .nav__link {
    font-size: var(--text-sm);
    padding-bottom: 2px;
  }

  .nav__link.is-active {
    box-shadow: inset 0 -1px 0 var(--color-accent);
  }

  .nav__link--cta {
    border: 1px solid var(--color-accent-dim);
    padding: var(--space-2) var(--space-4);
    border-radius: 4px;
  }

  .nav__link--cta:hover,
  .nav__link--cta.is-active {
    border-color: var(--color-accent);
    box-shadow: none;
  }

  .section__heading {
    font-size: var(--text-4xl);
  }

  .about__content {
    flex-direction: row;
    gap: var(--space-10);
  }

  .about__bio {
    flex: 3;
  }

  .about__quick-facts {
    flex: 2;
    align-self: start;
  }

  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .approach__steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 639px) {
  .hero__map {
    opacity: 0.45;
    -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.4) 100%);
    mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.4) 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }

  .hero__map-scan {
    display: none;
  }
}