/* ==========================================================================
   HAL 9000 // HIGH-PERFORMANCE MODERN RETRO-FUTURISTIC STYLESHEET
   Optimized for 60fps rendering, zero scroll lag & fluid mobile responsiveness
   ========================================================================== */

:root {
  --bg-deep: #07090d;
  --bg-surface: #0d1016;
  --bg-card: #121620;
  --bg-card-hover: #171d2a;
  --bg-terminal: #090c12;
  --bg-input: #0f131c;

  --hal-red: #ff1e42;
  --hal-red-bright: #ff385c;
  --hal-red-glow: rgba(255, 30, 66, 0.35);
  --hal-red-subtle: rgba(255, 30, 66, 0.1);
  --hal-amber: #ffb300;
  --hal-cyan: #00e5ff;
  --hal-cyan-glow: rgba(0, 229, 255, 0.25);
  --hal-green: #00e676;
  --hal-brass: #c59b27;

  --text-main: #f0f3f6;
  --text-muted: #8c96a5;
  --text-dim: #545d6e;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(255, 30, 66, 0.4);
  --border-cyan: rgba(0, 229, 255, 0.3);

  --font-display: 'Orbitron', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Share Tech Mono', monospace;
  --font-body: 'Space Grotesk', -apple-system, sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --transition-fast: 0.15s ease-out;
  --transition-smooth: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset & Smooth Rendering */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-body);
}

body {
  min-height: 100vh;
  background-color: var(--bg-deep);
  /* Static, performant dark mesh background - NO fixed attachment */
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(255, 30, 66, 0.08) 0%, transparent 50%),
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 600px, 32px 32px, 32px 32px;
  background-position: top center, 0 0, 0 0;
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Top System Navigation Bar
   ========================================================================== */
.sys-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 12, 17, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.65rem 1.25rem;
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-eye-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: radial-gradient(circle, #ff1e42 0%, #30000a 80%);
  border: 1.5px solid var(--hal-brass);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 8px var(--hal-red-glow);
  flex-shrink: 0;
}

.brand-eye-pupil {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 4px #ffffff;
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.sys-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  color: #ffffff;
  line-height: 1.1;
}

.sys-title span {
  color: var(--hal-red);
}

.sys-subtitle {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.sys-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--hal-cyan);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.telemetry-pill {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--hal-green);
  background: rgba(0, 230, 118, 0.08);
  border: 1px solid rgba(0, 230, 118, 0.25);
  padding: 0.35rem 0.65rem;
  border-radius: 20px;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--hal-green);
  box-shadow: 0 0 6px var(--hal-green);
}

.btn-github {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.75rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: var(--transition-fast);
}

.btn-github:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--hal-red);
  box-shadow: 0 0 10px var(--hal-red-subtle);
}

.gh-icon {
  flex-shrink: 0;
}

/* ==========================================================================
   Hero Section: Sleek Optical Core & Overview
   ========================================================================== */
.hero-section {
  padding: 3.5rem 1.25rem 2.5rem;
  position: relative;
}

.hero-container {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3.5rem;
  align-items: center;
}

/* Modernized Lightweight HAL Optical Unit */
.hal-unit-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hal-core-bezel {
  width: clamp(170px, 22vw, 240px);
  height: clamp(170px, 22vw, 240px);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #232733 0%, #11141c 65%, #08090d 100%);
  border: 3px solid #282e3d;
  box-shadow: 
    0 12px 35px rgba(0, 0, 0, 0.8),
    inset 0 2px 4px rgba(255, 255, 255, 0.15);
  padding: 10px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.hal-brass-rim {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, #ecd078 0%, #c59b27 70%, #684f0b 100%);
  padding: 5px;
  box-shadow: 0 0 10px rgba(197, 155, 39, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hal-iris {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, #2b0208 0%, #100103 70%, #000000 100%);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hal-glass-glare {
  position: absolute;
  top: 10%;
  left: 15%;
  width: 45%;
  height: 25%;
  border-radius: 50%;
  background: linear-gradient(175deg, rgba(255, 255, 255, 0.35) 0%, rgba(255, 255, 255, 0) 100%);
  transform: rotate(-30deg);
  pointer-events: none;
  z-index: 3;
}

.hal-pupil-tracker {
  position: relative;
  width: 50%;
  height: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  will-change: transform;
}

.pupil-ambient-glow {
  position: absolute;
  width: 120%;
  height: 120%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 30, 66, 0.6) 0%, rgba(255, 30, 66, 0.15) 55%, transparent 75%);
}

.pupil-core-ember {
  position: absolute;
  width: 60%;
  height: 60%;
  border-radius: 50%;
  background: radial-gradient(circle, #ffffff 0%, #ff8099 25%, #ff1e42 65%, #880016 100%);
  box-shadow: 0 0 18px var(--hal-red);
}

.pupil-specular-dot {
  position: absolute;
  width: 22%;
  height: 22%;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 6px #ffffff;
  z-index: 2;
}

.core-label {
  position: absolute;
  bottom: -22px;
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

/* Hero Content Deck */
.hero-text-deck {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.deck-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--hal-cyan);
  letter-spacing: 0.12em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.tag-accent {
  width: 8px;
  height: 8px;
  background: var(--hal-red);
  border-radius: 1px;
}

.hero-heading {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3.2vw, 2.45rem);
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.highlight-red {
  color: var(--hal-red-bright);
  text-shadow: 0 0 16px var(--hal-red-glow);
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 680px;
}

.quick-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
  margin-top: 0.25rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.85rem;
  border-left: 3px solid var(--hal-red);
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.stat-lbl {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-top: 0.25rem;
}

.hero-cta-group {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.btn-primary, .btn-secondary {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  cursor: pointer;
  transition: var(--transition-fast);
  touch-action: manipulation;
}

.btn-primary {
  background: var(--hal-red);
  color: #ffffff;
  border: 1px solid var(--hal-red-bright);
  box-shadow: 0 4px 14px var(--hal-red-glow);
  font-weight: 700;
}

.btn-primary:hover {
  background: #ff3355;
  box-shadow: 0 4px 20px rgba(255, 30, 66, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--hal-cyan);
  color: var(--hal-cyan);
  transform: translateY(-1px);
}

/* ==========================================================================
   Universal Section Containers & Headers
   ========================================================================== */
.section-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section-header {
  text-align: center;
  max-width: 740px;
  margin: 0 auto 2.5rem;
}

.header-pre {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--hal-amber);
  letter-spacing: 0.18em;
  margin-bottom: 0.35rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 1.95rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Interactive Terminal Section
   ========================================================================== */
.terminal-section {
  padding: 4rem 0 3.5rem;
  background: rgba(8, 10, 15, 0.6);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.terminal-deck {
  background: var(--bg-terminal);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.terminal-bar {
  background: #0f131a;
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.55rem 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.terminal-dots {
  display: flex;
  gap: 5px;
}

.terminal-dots .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.terminal-dots .dot.red { background: #ff5f56; }
.terminal-dots .dot.amber { background: #ffbd2e; }
.terminal-dots .dot.green { background: #27c93f; }

.terminal-title {
  color: var(--text-muted);
  letter-spacing: 0.06em;
  font-size: 0.72rem;
}

.terminal-mode {
  color: var(--hal-cyan);
  font-size: 0.68rem;
}

.terminal-chips-wrapper {
  background: #0b0e14;
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.terminal-chips-wrapper::-webkit-scrollbar {
  display: none;
}

.terminal-chips-bar {
  padding: 0.6rem 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
  width: max-content;
}

.chip-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-right: 0.25rem;
}

.cmd-chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  color: var(--hal-cyan);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: var(--radius-sm);
  padding: 0.28rem 0.55rem;
  cursor: pointer;
  transition: var(--transition-fast);
  touch-action: manipulation;
}

.cmd-chip:hover, .cmd-chip:active {
  background: rgba(0, 229, 255, 0.12);
  border-color: var(--hal-cyan);
  color: #ffffff;
}

.cmd-chip.clear-chip {
  color: var(--hal-amber);
  border-color: rgba(255, 170, 0, 0.25);
  margin-left: 0.5rem;
}

.cmd-chip.clear-chip:hover {
  background: rgba(255, 170, 0, 0.12);
}

.terminal-screen {
  height: 380px;
  overflow-y: auto;
  padding: 1rem 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.5;
  color: #d8dde6;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  background: var(--bg-terminal);
}

.terminal-screen::-webkit-scrollbar {
  width: 5px;
}
.terminal-screen::-webkit-scrollbar-thumb {
  background: rgba(255, 30, 66, 0.25);
  border-radius: 3px;
}

.terminal-log-line {
  word-break: break-word;
  white-space: pre-wrap;
}

.terminal-log-line .prompt {
  color: var(--hal-red-bright);
  font-weight: 700;
}

.terminal-log-line .user-prompt {
  color: var(--hal-amber);
  font-weight: 700;
}

.terminal-log-line .hl-cyan { color: var(--hal-cyan); }
.terminal-log-line .hl-amber { color: var(--hal-amber); }
.terminal-log-line .hl-red { color: var(--hal-red-bright); }
.terminal-log-line .hl-green { color: var(--hal-green); }

.terminal-msg-box {
  background: rgba(255, 255, 255, 0.02);
  border-left: 3px solid var(--hal-red);
  padding: 0.65rem 0.85rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 0.2rem 0;
}

.terminal-sim-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.term-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: #141822;
  color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.55rem;
  cursor: pointer;
  transition: var(--transition-fast);
  touch-action: manipulation;
}

.term-btn:hover {
  border-color: var(--hal-red);
  background: #201015;
}

.terminal-input-bar {
  background: var(--bg-input);
  border-top: 1px solid var(--border-subtle);
  padding: 0.65rem 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.input-prompt {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--hal-amber);
  white-space: nowrap;
}

#terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: #ffffff;
  min-width: 0;
}

#terminal-input::placeholder {
  color: rgba(255, 255, 255, 0.3);
}

.btn-terminal-send {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--hal-red);
  color: #ffffff;
  border: none;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: var(--transition-fast);
  flex-shrink: 0;
  touch-action: manipulation;
}

.btn-terminal-send:hover {
  background: #ff3355;
}

/* ==========================================================================
   Subsystems Matrix Grid
   ========================================================================== */
.subsystems-section {
  padding: 4.5rem 0;
}

.grid-subsystems {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
}

.subsystem-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
}

.subsystem-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--hal-cyan);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.subsystem-card.card-featured {
  border-color: rgba(255, 30, 66, 0.35);
  background: linear-gradient(180deg, rgba(255, 30, 66, 0.04) 0%, var(--bg-card) 60%);
}

.subsystem-card.card-featured:hover {
  border-color: var(--hal-red);
  box-shadow: 0 8px 24px rgba(255, 30, 66, 0.15);
}

.card-status-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  margin-bottom: 0.75rem;
}

.sys-code {
  color: var(--text-muted);
  letter-spacing: 0.12em;
}

.sys-state.active {
  color: var(--hal-green);
  letter-spacing: 0.06em;
  font-weight: 700;
}

.card-icon {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.35rem;
  line-height: 1.3;
}

.card-command {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--hal-amber);
  margin-bottom: 0.85rem;
}

.card-command code {
  background: rgba(255, 179, 0, 0.1);
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  border: 1px solid rgba(255, 179, 0, 0.2);
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1.15rem;
}

.card-specs {
  list-style: none;
  font-size: 0.82rem;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.85rem;
}

.card-specs li {
  position: relative;
  padding-left: 1.1rem;
  line-height: 1.4;
}

.card-specs li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--hal-red);
}

.card-specs li strong {
  color: #ffffff;
}

/* ==========================================================================
   Security Vault Section
   ========================================================================== */
.security-section {
  padding: 4.5rem 0;
  background: rgba(13, 16, 22, 0.7);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.security-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.security-text .section-title {
  text-align: left;
}

.security-text .section-desc {
  font-size: 0.96rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.security-badges {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.badge-item {
  display: flex;
  gap: 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  align-items: flex-start;
}

.badge-item .b-icon {
  font-size: 1.4rem;
  line-height: 1.2;
}

.badge-item strong {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #ffffff;
  letter-spacing: 0.04em;
  display: block;
  margin-bottom: 0.2rem;
}

.badge-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Architecture Flow Diagram */
.security-diagram {
  background: #090c12;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.diag-node {
  width: 100%;
  max-width: 360px;
  background: #11151e;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.85rem;
  text-align: center;
  display: flex;
  flex-direction: column;
}

.diag-lbl {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
}

.diag-val {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 0.2rem;
}

.diag-node.diag-core {
  border-color: var(--hal-red);
  background: #1a080d;
}

.diag-node.diag-core .diag-val {
  color: var(--hal-red-bright);
}

.diag-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--hal-cyan);
  padding: 0.25rem 0;
}

.diag-arrow {
  font-size: 0.75rem;
  line-height: 1;
}

.diag-protocol {
  letter-spacing: 0.06em;
}

/* ==========================================================================
   Command Directory Cards Matrix
   ========================================================================== */
.command-matrix-section {
  padding: 4.5rem 0;
}

.matrix-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.cmd-search-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #ffffff;
  outline: none;
  transition: border-color var(--transition-fast);
}

.cmd-search-input:focus {
  border-color: var(--hal-red);
}

.search-hint {
  position: absolute;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  pointer-events: none;
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  transition: var(--transition-fast);
  touch-action: manipulation;
}

.pill:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

.pill.active {
  background: var(--hal-red-subtle);
  border-color: var(--hal-red);
  color: var(--hal-red-bright);
  font-weight: 700;
}

/* Command Cards Grid */
.cmd-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.85rem;
}

.cmd-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  transition: var(--transition-fast);
}

.cmd-card-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: var(--bg-card-hover);
}

.cmd-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

code.copy-cmd {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--hal-cyan);
  background: rgba(0, 229, 255, 0.08);
  padding: 0.2rem 0.45rem;
  border-radius: 3px;
  border: 1px solid rgba(0, 229, 255, 0.2);
  cursor: pointer;
  word-break: break-all;
}

code.copy-cmd:hover {
  border-color: var(--hal-cyan);
}

.cat-badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-weight: 700;
  flex-shrink: 0;
}

.cat-badge.files { background: rgba(0, 229, 255, 0.12); color: var(--hal-cyan); }
.cat-badge.power { background: rgba(255, 30, 66, 0.15); color: var(--hal-red-bright); }
.cat-badge.display { background: rgba(255, 179, 0, 0.15); color: var(--hal-amber); }
.cat-badge.servers { background: rgba(0, 230, 118, 0.15); color: var(--hal-green); }
.cat-badge.system { background: rgba(255, 255, 255, 0.12); color: #ffffff; }

.cmd-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
  flex: 1;
}

.btn-copy {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  padding: 0.25rem 0.55rem;
  cursor: pointer;
  transition: var(--transition-fast);
  margin-top: 0.25rem;
  touch-action: manipulation;
}

.btn-copy:hover {
  color: #ffffff;
  border-color: var(--hal-cyan);
}

.btn-copy.copied {
  color: var(--hal-green);
  border-color: var(--hal-green);
  background: rgba(0, 230, 118, 0.1);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.sys-footer {
  background: #05070a;
  border-top: 1px solid var(--border-subtle);
  padding: 2rem 1.25rem;
  font-family: var(--font-mono);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-eye-badge {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: radial-gradient(circle, #ff1e42 0%, #30000a 80%);
  border: 1px solid var(--hal-brass);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mini-pupil {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #ffffff;
}

.footer-title {
  font-size: 0.78rem;
  color: #ffffff;
  letter-spacing: 0.08em;
}

.footer-sub {
  font-size: 0.62rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  transition: color var(--transition-fast);
}

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

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

.status-indicator {
  font-size: 0.7rem;
  color: var(--hal-green);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.footer-copy {
  font-size: 0.62rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* ==========================================================================
   Responsive Adaptations (Tablet & Mobile)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 220px 1fr;
    gap: 2.5rem;
  }
  .security-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .security-text .section-title {
    text-align: center;
  }
  .security-text .section-desc {
    text-align: center;
  }
}

@media (max-width: 860px) {
  .sys-nav {
    display: none; /* Hide horizontal nav on mobile for a clean header */
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .hal-unit-wrapper {
    order: -1;
  }

  .deck-tag {
    justify-content: center;
  }

  .hero-desc {
    margin: 0 auto;
  }

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

  .hero-cta-group {
    justify-content: center;
  }

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

@media (max-width: 600px) {
  .header-container {
    gap: 0.5rem;
  }

  .telemetry-pill {
    display: none; /* Keep header strictly 1-row without clutter */
  }

  .hero-section {
    padding: 2rem 1rem 1.5rem;
  }

  .hero-heading {
    font-size: 1.5rem;
  }

  .stat-card {
    padding: 0.65rem;
  }

  .stat-num {
    font-size: 1.05rem;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
  }

  .terminal-screen {
    height: 300px;
    padding: 0.85rem;
    font-size: 0.8rem;
  }

  .terminal-input-bar {
    padding: 0.5rem 0.65rem;
  }

  .input-prompt {
    font-size: 0.75rem;
  }

  .cmd-cards-grid {
    grid-template-columns: 1fr;
  }

  .footer-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .footer-right {
    align-items: flex-start;
    text-align: left;
  }
}