/* ============================================
   wellknown.digital — Design System
   "The Twilio for Agentic Commerce"
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors - Dark Mode Primary */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a24;
  --color-bg-glass: rgba(26, 26, 36, 0.7);

  /* Accent Colors - Mint Green ("DNS Connection" vibe) */
  --color-accent-primary: #4ADE80;
  --color-accent-secondary: #22c55e;
  /* Darker green, no purple */
  --color-accent-gradient: linear-gradient(135deg, #4ADE80 0%, #22c55e 100%);
  /* Pure green gradient */
  --color-accent-glow: rgba(74, 222, 128, 0.25);

  /* Text Colors */
  --color-text-primary: #e8e8ed;
  /* Slightly softened from pure white */
  --color-text-secondary: #a0a0b0;
  --color-text-muted: #6b6b7b;
  --color-text-code: #4ADE80;

  /* Status Colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Borders */
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Font Sizes */
  --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;
  --text-7xl: 4.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px var(--color-accent-glow);

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

  /* Z-Index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;

  /* Container */
  --container-max: 1200px;
  --container-narrow: 800px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
  /* Grid Texture with Vignette */
  background-image:
    radial-gradient(circle at 50% 50%, transparent 20%, #18181b 100%),
    linear-gradient(#27272a 1px, transparent 1px),
    linear-gradient(90deg, #27272a 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
  background-position: 0 0, -1px -1px, -1px -1px;
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-mono);
  /* Developer Vibe */
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.04em;
  /* Tighten mono headers */
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--text-3xl);
  /* 1.875rem base mobile */
}

@media (min-width: 480px) {
  h1 {
    font-size: var(--text-4xl);
  }
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

@media (min-width: 768px) {
  h1 {
    font-size: var(--text-6xl);
  }

  h2 {
    font-size: var(--text-5xl);
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: var(--text-7xl);
  }
}

p {
  color: var(--color-text-secondary);
  max-width: 65ch;
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-text-primary);
}

code,
.code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text-code);
  background: var(--color-bg-tertiary);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

.section {
  padding: var(--space-16) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-24) 0;
  }
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-4) 0;
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav__logo {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.nav__logo span {
  color: var(--color-accent-primary);
}

.nav__links {
  display: none;
  list-style: none;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.nav__cta {
  display: none !important;
}

@media (min-width: 768px) {
  .nav__cta {
    display: inline-flex !important;
  }
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav__toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform var(--transition-base);
}

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }
}

/* Mobile Menu Open State */
.nav__links--open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6);
  gap: var(--space-4);
}

/* ---------- Buttons ---------- */
/* ---------- Buttons (Hardware Style) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-mono);
  /* Technical Font */
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  /* Sharp 4px corners */
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--color-accent-primary);
  color: #0a1f12;
  /* Dark forest green instead of pure black */
  box-shadow: 0 0 6px rgba(74, 222, 128, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
  /* Subtler glow for a less "AI-generated" feel */
}

.btn--primary:hover {
  background: #5ed692;
  /* Darker, less bright mint for hover */
  box-shadow: 0 0 6px rgba(74, 222, 128, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-accent-primary);
  background: rgba(74, 222, 128, 0.08);
  box-shadow: 0 0 6px rgba(74, 222, 128, 0.12);
}

.btn--large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ---------- Animations ---------- */
@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

@keyframes pulse-mint {
  0% {
    box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7);
  }

  70% {
    box-shadow: 0 0 0 6px rgba(74, 222, 128, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(74, 222, 128, 0);
  }
}

.cursor-blink {
  display: inline-block;
  width: 0.6em;
  height: 1.2em;
  background-color: var(--color-accent-primary);
  animation: blink 1s step-end infinite;
  vertical-align: middle;
  margin-left: 2px;
}

.status-pulse {
  animation: pulse-amber 2s infinite;
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 80%;
  height: 100%;
  background: radial-gradient(ellipse, var(--color-accent-glow) 0%, transparent 70%);
  opacity: 0.3;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent-primary);
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: var(--radius-full);
}

.hero__headline {
  margin-bottom: var(--space-6);
}

.hero__headline code {
  display: inline-block;
  padding: 0.1em 0.3em;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
}

.hero__subheadline {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

/* ---------- Glass Cards ---------- */
/* ---------- Industrial Cards ---------- */
.card {
  background: rgba(24, 24, 27, 0.6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  /* Sharp corners */
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
}

.card:hover {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 20px rgba(74, 222, 128, 0.15);
  transform: translateY(-2px);
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--color-accent-primary);
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xl);
}

.card__title {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}

.card__text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ---------- Terminal Window (Hero Visual) ---------- */
.terminal-window {
  width: 100%;
  max-width: 600px;
  background: rgba(30, 30, 30, 0.9);
  /* #1E1E1E slightly transparent */
  backdrop-filter: blur(4px);
  /* Glass blur */
  border: 1px solid #3f3f46;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  margin: 0 auto;
  font-family: var(--font-mono);
  text-align: left;
}

.terminal-header {
  background: #27272a;
  padding: 8px 12px;
  display: flex;
  gap: 6px;
  border-bottom: 1px solid #3f3f46;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #52525b;
}

.terminal-dot:nth-child(1) {
  background: #ef4444;
}

.terminal-dot:nth-child(2) {
  background: #f59e0b;
}

.terminal-dot:nth-child(3) {
  background: #10b981;
}

.terminal-body {
  padding: 24px;
  color: var(--color-accent-primary);
  /* Amber Text */
  font-size: var(--text-sm);
  line-height: 1.6;
}

.command-line {
  color: var(--color-accent-primary);
  margin-bottom: 12px;
}

.command-prompt {
  color: var(--color-accent-primary);
  margin-right: 8px;
  opacity: 0.7;
}

.terminal-output {
  color: var(--color-accent-primary);
  /* Monochromatic Amber */
  opacity: 0.9;
}

/* ---------- Grid Layouts ---------- */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- Section Headers ---------- */
.section__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section__label {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-primary);
  margin-bottom: var(--space-4);
}

.section__title {
  margin-bottom: var(--space-4);
}

.section__text {
  font-size: var(--text-lg);
  margin: 0 auto;
}

/* ---------- N x N Problem Visual ---------- */
.nxn {
  position: relative;
}

.nxn__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 768px) {
  .nxn__grid {
    grid-template-columns: 1fr auto 1fr;
  }
}

.nxn__side {
  text-align: center;
}

.nxn__visual {
  width: 100%;
  max-width: 350px;
  height: 300px;
  margin: 0 auto var(--space-4);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.nxn__visual svg {
  max-width: 100%;
  height: auto;
}

.nxn__label {
  font-size: var(--text-lg);
  font-weight: 600;
}

.nxn__arrow {
  display: none;
  font-size: var(--text-4xl);
  color: var(--color-accent-primary);
}

@media (min-width: 768px) {
  .nxn__arrow {
    display: block;
  }
}

/* ---------- Solution Section ---------- */
.solution {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.solution__quote {
  font-size: var(--text-2xl);
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text-primary);
  max-width: 800px;
  margin: 0 auto var(--space-8);
  text-align: center;
}

@media (min-width: 768px) {
  .solution__quote {
    font-size: var(--text-3xl);
  }
}

.solution__body {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.solution__trust {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
}

.solution__trust svg {
  color: var(--color-success);
}

/* ---------- Pillars / Services ---------- */
.pillars__grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .pillars__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillar {
  background: var(--color-bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.pillar:hover {
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow);
}

.pillar__icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.pillar__name {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-accent-primary);
  margin-bottom: var(--space-2);
}

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

.pillar__text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ---------- Trust / Social Proof ---------- */
.trust {
  background: var(--color-bg-secondary);
  text-align: center;
}

.trust__logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.trust__logo {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-muted);
  opacity: 0.6;
  transition: opacity var(--transition-base);
}

.trust__logo:hover {
  opacity: 1;
}

.trust__protocols {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

.trust__protocol {
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

/* ---------- CTA Section ---------- */
.cta-section {
  background: var(--color-accent-gradient);
  text-align: center;
}

.cta-section .section__title,
.cta-section .section__text {
  color: var(--color-bg-primary);
}

.cta-section .section__text {
  opacity: 0.9;
}

.cta-section .btn--primary {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-lg);
}

.cta-section .btn--primary:hover {
  box-shadow: var(--shadow-xl);
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
}

/* ---------- Audit Tool Styles ---------- */
.audit-form {
  max-width: 500px;
  margin: 0 auto;
}

.audit-form__input-group {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.audit-form__input {
  flex: 1;
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  outline: none;
  transition: border-color var(--transition-fast);
}

.audit-form__input:focus {
  border-color: var(--color-accent-primary);
}

.audit-form__input::placeholder {
  color: var(--color-text-muted);
}

.audit-results {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-align: left;
}

.audit-results__line {
  display: flex;
  justify-content: space-between;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.audit-results__line:last-child {
  border-bottom: none;
}

.audit-results__status {
  font-weight: 600;
}

.audit-results__status--success {
  color: var(--color-success);
}

.audit-results__status--warning {
  color: var(--color-warning);
}

.audit-results__status--error {
  color: var(--color-error);
}

/* ---------- Comparison Table ---------- */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-8) 0;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-table td {
  color: var(--color-text-secondary);
}

.comparison-table tr:hover td {
  background: var(--color-bg-secondary);
}

/* ---------- Animation Utilities ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- Utility Classes ---------- */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-gradient {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

/* ---------- Utility: Mono Typography for Acronyms ---------- */
.mono {
  font-family: var(--font-mono);
  color: var(--color-accent-primary);
  font-weight: 600;
}

/* ---------- Terminal Transport Toggle ---------- */
.terminal-tabs {
  display: flex;
  gap: 0;
  margin-left: auto;
}

.terminal-tab {
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: transparent;
  border: 1px solid #3f3f46;
  color: #6b6b7b;
  cursor: pointer;
  transition: all 0.2s ease;
}

.terminal-tab:first-child {
  border-radius: 4px 0 0 4px;
}

.terminal-tab:last-child {
  border-radius: 0 4px 4px 0;
  border-left: none;
}

.terminal-tab--active {
  background: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
  color: #000;
}

.terminal-tab:hover:not(.terminal-tab--active) {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
}

.terminal-content {
  display: none;
}

.terminal-content--active {
  display: block;
}

/* ---------- Server Rack Protocol Stack ---------- */
.server-rack {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 500px;
  margin: 0 auto;
}

.rack-unit {
  background: rgba(24, 24, 27, 0.9);
  border: 1px solid #3f3f46;
  border-radius: 4px;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  position: relative;
  transition: all 0.2s ease;
}

.rack-unit:hover {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 15px rgba(74, 222, 128, 0.15);
}

.rack-unit__leds {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rack-unit__led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3f3f46;
}

.rack-unit__led--active {
  background: var(--color-accent-primary);
  box-shadow: 0 0 8px var(--color-accent-primary);
}

@keyframes led-blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }
}

@keyframes led-flicker {

  0%,
  100% {
    opacity: 1;
  }

  25% {
    opacity: 0.4;
  }

  50% {
    opacity: 0.9;
  }

  75% {
    opacity: 0.5;
  }
}

.rack-unit--brain .rack-unit__led--active {
  animation: led-blink 2s ease-in-out infinite;
}

.rack-unit--router .rack-unit__led--active {
  animation: led-flicker 0.5s steps(1) infinite;
}

.rack-unit--vault .rack-unit__led--active {
  background: var(--color-accent-primary);
  animation: none;
  /* Solid, secure */
}

.rack-unit__content {
  flex: 1;
}

.rack-unit__name {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.rack-unit__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.rack-unit__badge {
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.rack-unit__badge--encrypted {
  background: var(--color-accent-primary);
  color: #000;
}

/* ---------- Spec Compliance Badge ---------- */
.spec-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-primary);
  background: transparent;
  border: 1px solid var(--color-accent-primary);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all 0.3s ease;
}

.spec-badge:hover {
  color: #000;
  background: var(--color-accent-primary);
  box-shadow: 0 0 20px rgba(74, 222, 128, 0.5), 0 0 40px rgba(74, 222, 128, 0.2);
  transform: translateY(-1px);
}

.spec-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-primary);
  animation: pulse-mint 2s infinite;
}

.spec-badge:hover .spec-badge__dot {
  background: #000;
  animation: none;
}