/* ================================================================
   HMI Theme — Windows 98 / Delta HMI Touchscreen Aesthetic
   Chunky bevels, flat colors, hard edges, dense layout.
   Loaded last to override base styles via cascade.
   ================================================================ */

/* ── Body & Global ── */
body {
  background: var(--color-secondary);
  color: var(--color-text);
  font-family: var(--font-body);
}

/* ══════════════════════════════════════════════
   HMI HOME / WELCOME SCREEN
   ══════════════════════════════════════════════ */
.hmi-home-screen {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

.hmi-home-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 20px;
  background: var(--color-secondary);
}

/* Logo */
.hmi-home-logo {
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 3px solid;
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  padding: 20px;
}

.hmi-home-logo img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Company name */
.hmi-home-company {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-align: center;
  margin: 0;
  line-height: 1.2;
}

.hmi-home-subtitle {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.2em;
  text-align: center;
  margin: 0;
}

/* Status readout row */
.hmi-home-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 6px 16px;
  background: var(--hmi-status-bar);
  border: 2px solid;
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
}

.hmi-home-status-label {
  color: var(--color-primary);
}

.hmi-home-status-value {
  color: var(--color-text);
}

.hmi-home-status-value--green {
  color: var(--color-success);
}

.hmi-home-status-divider {
  color: var(--color-text-muted);
}

/* Enter button — big chunky HMI button */
.hmi-home-enter-btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-on-primary);
  background: var(--color-primary);
  padding: 14px 48px;
  border: 4px solid;
  border-top-color: #E0C060;
  border-left-color: #E0C060;
  border-bottom-color: #6A5010;
  border-right-color: #6A5010;
  cursor: pointer;
  margin-top: 8px;
}

.hmi-home-enter-btn:hover {
  background: var(--color-primary-hover);
}

.hmi-home-enter-btn:active {
  border-top-color: #6A5010;
  border-left-color: #6A5010;
  border-bottom-color: #E0C060;
  border-right-color: #E0C060;
  transform: translateY(1px);
}

/* Mobile adjustments */
@media (max-width: 767px) {
  .hmi-home-logo {
    width: 160px;
    height: 160px;
    padding: 14px;
  }

  .hmi-home-company {
    font-size: 1.25rem;
  }

  .hmi-home-subtitle {
    font-size: 0.75rem;
  }

  .hmi-home-enter-btn {
    font-size: 1rem;
    padding: 12px 36px;
  }

  .hmi-home-status {
    font-size: 0.6875rem;
    gap: 5px;
  }
}

*, *::before, *::after {
  border-radius: 0 !important;
}

/* ── HMI Status Bar — Dark navy with gold accents ── */
.hmi-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 3px 10px;
  background: var(--hmi-status-bar);
  border-bottom: 3px solid;
  border-bottom-color: #C9A227;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.hmi-screen-title {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hmi-clock {
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-size: 0.8125rem;
  min-width: 160px;
}

.hmi-status-indicators {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hmi-led {
  width: 10px;
  height: 10px;
  border-radius: 0 !important;
  border: 2px solid;
  border-top-color: #333;
  border-left-color: #333;
  border-bottom-color: #888;
  border-right-color: #888;
}

.hmi-led--green {
  background: var(--color-success);
}

.hmi-led--amber {
  background: var(--color-warning);
}

.hmi-led--red {
  background: var(--color-error);
}

.hmi-led--off {
  background: #2A3A50;
}

.hmi-status-label {
  font-size: 0.6875rem;
  color: #8898B0;
  letter-spacing: 0.1em;
}

/* ── Header ── */
.site-header {
  background: var(--color-secondary);
  border-bottom: 3px solid var(--hmi-panel-border);
}

.header-inner {
  align-items: flex-start;
  padding-top: 4px;
}

.site-logo .logo-text,
.site-logo .logo-text-short,
.site-logo .logo-text-full {
  font-family: var(--font-display);
  letter-spacing: 0.2em;
  color: var(--color-primary);
}

/* ── Desktop Nav: Chunky HMI Tab Buttons ── */
.desktop-nav .nav-list {
  gap: 3px;
  background: var(--color-secondary);
  padding: 0;
}

.desktop-nav .nav-list a {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 14px;
  color: var(--hmi-btn-inactive-text);
  background: var(--hmi-btn-inactive);
  border: 3px solid;
  border-top-color: var(--hmi-bevel-light);
  border-left-color: var(--hmi-bevel-light);
  border-bottom-color: var(--hmi-bevel-dark);
  border-right-color: var(--hmi-bevel-dark);
  transition: none;
  text-decoration: none;
}

.desktop-nav .nav-list a:hover {
  background: #5A6A80;
  color: #FFFFFF;
}

.desktop-nav .nav-list a[aria-current="page"] {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  font-weight: 700;
  border-top-color: var(--hmi-bevel-light-strong);
  border-left-color: var(--hmi-bevel-light-strong);
  border-bottom-color: var(--hmi-bevel-dark-strong);
  border-right-color: var(--hmi-bevel-dark-strong);
}

.desktop-nav .nav-list a:active {
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  padding: 9px 13px 7px 15px;
}

/* Header CTA */
.header-cta.btn-primary {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ── Mobile Drawer ── */
.drawer-panel {
  background: var(--color-secondary);
  border-left: 3px solid var(--hmi-panel-border);
}

.nav-drawer nav a {
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 3px;
  padding: 12px 14px;
  background: var(--hmi-btn-inactive);
  color: var(--hmi-btn-inactive-text);
  border: 3px solid;
  border-top-color: var(--hmi-bevel-light);
  border-left-color: var(--hmi-bevel-light);
  border-bottom-color: var(--hmi-bevel-dark);
  border-right-color: var(--hmi-bevel-dark);
}

.nav-drawer nav a:hover {
  background: #5A6A80;
  color: #FFFFFF;
}

.nav-drawer nav a[aria-current="page"] {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

/* ── Buttons: Chunky Beveled HMI Touch ── */
.btn {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 3px solid;
  border-top-color: var(--hmi-bevel-light);
  border-left-color: var(--hmi-bevel-light);
  border-bottom-color: var(--hmi-bevel-dark);
  border-right-color: var(--hmi-bevel-dark);
  position: relative;
  transition: none;
  box-shadow: none;
}

.btn:hover {
  box-shadow: none;
}

.btn:active {
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  padding-top: calc(0.625rem + 1px);
  padding-bottom: calc(0.625rem - 1px);
  padding-left: calc(1.25rem + 1px);
  padding-right: calc(1.25rem - 1px);
  box-shadow: none;
  transform: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: none;
}

.btn-secondary {
  background: var(--hmi-btn-inactive);
  color: #FFFFFF;
}

.btn-secondary:hover {
  background: #5A6A80;
}

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

.btn-ghost:hover {
  background: rgba(0, 200, 255, 0.15);
}

.btn-ghost--dark {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ── Cards: HMI Panel Blocks ── */
.card {
  background: var(--color-surface-raised);
  border: 3px solid;
  border-top-color: var(--hmi-bevel-light);
  border-left-color: var(--hmi-bevel-light);
  border-bottom-color: var(--hmi-bevel-dark);
  border-right-color: var(--hmi-bevel-dark);
  box-shadow: none;
}

.card:hover {
  background: #1E4070;
  border-top-color: var(--hmi-bevel-light);
  border-left-color: var(--hmi-bevel-light);
  border-bottom-color: var(--hmi-bevel-dark);
  border-right-color: var(--hmi-bevel-dark);
  box-shadow: none;
  transform: none;
}

.card-icon {
  background: var(--color-secondary);
  border: 2px solid;
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  color: var(--color-primary);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--font-size-base);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #FFFFFF;
}

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

.card-link {
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Sections ── */
.section {
  border-bottom: 3px solid var(--hmi-panel-border);
}

.section--alt {
  background: var(--color-surface-alt);
}

.section--dark {
  background: #0A1C38;
}

.section--primary,
.cta-band {
  background: #132D50;
  border: 3px solid var(--color-primary);
}

.section-eyebrow {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
}

.section-title {
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  color: #FFFFFF;
}

.section-subtitle {
  color: var(--color-text-muted);
}

/* ── Hero ── */
.hero--full {
  background: #0A1C38;
  border-bottom: 3px solid var(--color-primary);
}

.hero--compact {
  background: #0C2040;
  border-bottom: 3px solid var(--hmi-panel-border);
}

.hero-overlay {
  background: rgba(10, 28, 56, 0.9);
}

.hero-eyebrow {
  color: var(--color-accent);
  font-family: var(--font-mono);
}

#hero-heading,
.hero h1,
.hero-content h1 {
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  color: #FFFFFF;
}

.hero-sub {
  color: var(--color-text-muted);
}

/* ── Split Sections ── */
.split-content h2 {
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  color: #FFFFFF;
}

.split-content p {
  color: var(--color-text);
}

.split-content li svg {
  color: var(--color-success);
}

.split-content li span {
  color: var(--color-text);
}

/* ── Steps ── */
.step-icon {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  font-family: var(--font-display);
  border: 3px solid;
  border-top-color: var(--hmi-bevel-light-strong);
  border-left-color: var(--hmi-bevel-light-strong);
  border-bottom-color: var(--hmi-bevel-dark-strong);
  border-right-color: var(--hmi-bevel-dark-strong);
}

.step-title {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #FFFFFF;
}

.step-desc {
  color: var(--color-text-muted);
}

/* ── Stats ── */
.stat-value {
  font-family: var(--font-display);
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.stat-label {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ── CTA Band ── */
.cta-band h2 {
  font-family: var(--font-display);
  color: #FFFFFF;
}

.cta-band p {
  color: var(--color-text-muted);
}

/* ── Footer ── */
.site-footer {
  background: #0A1830;
  border-top: 3px solid var(--hmi-panel-border);
}

.site-footer h3 {
  font-family: var(--font-display);
  letter-spacing: 0.15em;
  color: var(--color-accent);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.site-footer nav a,
.footer-contact a,
.footer-contact li {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.site-footer nav a:hover,
.footer-contact a:hover {
  color: var(--color-primary);
}

.footer-brand .site-logo .logo-text {
  font-family: var(--font-display);
  color: var(--color-primary);
}

.footer-brand p {
  color: var(--color-text-muted);
}

.footer-rule {
  border-color: var(--hmi-panel-border);
}

.footer-bottom {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.footer-bottom a {
  color: var(--color-text-muted);
}

.footer-bottom a:hover {
  color: var(--color-primary);
}

/* ── Forms — Sunken input fields (Win98 inset) ── */
.form-field label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
}

.form-input,
.form-textarea,
.form-select {
  background: #08162C;
  color: var(--color-primary);
  font-family: var(--font-mono);
  caret-color: var(--color-primary);
  /* Sunken inset bevel — opposite of raised buttons */
  border: 3px solid;
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #405878;
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
  border-top-color: var(--hmi-bevel-dark-strong);
  border-left-color: var(--hmi-bevel-dark-strong);
  border-bottom-color: var(--hmi-bevel-light-strong);
  border-right-color: var(--hmi-bevel-light-strong);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-top-color: var(--color-primary);
  border-left-color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  border-right-color: var(--color-primary);
  box-shadow: none;
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.form-field.--error .form-input,
.form-field.--error .form-textarea {
  border-color: var(--color-error);
}

.form-field.--error .form-input:focus,
.form-field.--error .form-textarea:focus {
  outline-color: var(--color-error);
  box-shadow: none;
}

.field-error {
  color: var(--color-error);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.form-error-summary {
  background: #200810;
  border: 3px solid var(--color-error);
  color: var(--color-error);
  font-family: var(--font-mono);
}

.form-success {
  background: #082010;
  border: 3px solid var(--color-success);
  color: var(--color-success);
  font-family: var(--font-mono);
}

/* ── Accordion (FAQ) — Sunken panels ── */
.accordion-item {
  background: var(--color-surface-raised);
  border: 3px solid;
  border-top-color: var(--hmi-bevel-light);
  border-left-color: var(--hmi-bevel-light);
  border-bottom-color: var(--hmi-bevel-dark);
  border-right-color: var(--hmi-bevel-dark);
}

.accordion-item[open] {
  border-top-color: var(--color-primary);
  border-left-color: var(--color-primary);
  border-bottom-color: #005878;
  border-right-color: #005878;
  box-shadow: none;
}

.accordion-item summary {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.03em;
  color: #FFFFFF;
}

.accordion-item summary:hover {
  background: #1E4070;
}

.accordion-body p,
.accordion-body li {
  color: var(--color-text);
}

/* ── Focus & Accessibility ── */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 1px;
  box-shadow: none;
}

.skip-link {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
  font-family: var(--font-display);
}

/* ── HMI Bezel Frame (Desktop Only) ── */
@media (min-width: 1200px) {
  body {
    background: #1A1A1E;
  }

  .hmi-bezel {
    max-width: 1440px;
    margin: 16px auto;
    height: calc(100vh - 32px);
    display: flex;
    flex-direction: column;
    background: linear-gradient(145deg, #4A4D52 0%, #3A3D42 30%, #2A2D32 70%, #1A1D22 100%);
    border-radius: 0 !important;
    padding: 10px;
    border: 3px solid;
    border-top-color: #6A6D72;
    border-left-color: #6A6D72;
    border-bottom-color: #0A0D12;
    border-right-color: #0A0D12;
    box-sizing: border-box;
  }

  .hmi-screen {
    border-radius: 0 !important;
    overflow: hidden;
    flex: 1;
    display: flex;
    flex-direction: column;
    border: 3px solid;
    border-top-color: #060A10;
    border-left-color: #060A10;
    border-bottom-color: #3A4050;
    border-right-color: #3A4050;
  }

  /* Sub-pages (with site-header) should scroll normally */
  body:has(.site-header) .hmi-bezel {
    height: auto;
    min-height: calc(100vh - 32px);
  }

  body:has(.site-header) .hmi-screen {
    overflow: auto;
  }
}

@media (max-width: 1199px) {
  .hmi-bezel,
  .hmi-screen {
    display: contents;
  }
}

/* ── Animations ── */
@keyframes led-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hmi-led--green {
  animation: led-blink 2s step-start infinite;
}

@media (prefers-reduced-motion: reduce) {
  .hmi-led--green {
    animation: none;
  }
}

/* ── Responsive: Mobile Status Bar ── */
@media (max-width: 767px) {
  .hmi-status-bar {
    padding: 2px 8px;
    font-size: 0.6875rem;
  }

  .hmi-screen-title {
    font-size: 0.75rem;
  }

  .hmi-status-label {
    display: none;
  }

  .hmi-clock {
    min-width: auto;
    font-size: 0.6875rem;
  }
}

@media (max-width: 1023px) {
  .hmi-status-indicators {
    gap: 4px;
  }
}

/* ── Feature list icons ── */
.feature-icon {
  background: var(--color-secondary);
  border: 2px solid;
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  color: var(--color-primary);
}

.feature-title {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #FFFFFF;
}

.feature-desc {
  color: var(--color-text-muted);
}

/* ── Contact info sidebar ── */
.contact-info-icon {
  background: var(--color-secondary);
  border: 2px solid;
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  color: var(--color-primary);
}

.contact-info-item h3 {
  font-family: var(--font-display);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Split media placeholder ── */
.split-media div {
  background-color: var(--color-surface-raised) !important;
  border: 3px solid !important;
  border-top-color: var(--hmi-bevel-dark) !important;
  border-left-color: var(--hmi-bevel-dark) !important;
  border-bottom-color: var(--hmi-bevel-light) !important;
  border-right-color: var(--hmi-bevel-light) !important;
  color: var(--color-text-muted) !important;
}

/* ── Pull quote ── */
blockquote {
  color: var(--color-primary);
  font-family: var(--font-body);
}

blockquote cite {
  color: var(--color-accent);
  font-family: var(--font-mono);
}

/* ================================================================
   HMI MAIN MENU SCREEN — Split layout with controls + diagram
   Left: service buttons. Right: process flow, gauges, readouts.
   ================================================================ */

.hmi-main-screen {
  height: calc(100vh - 70px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--color-secondary);
}

/* On main screen, hide header nav — bottom bar replaces it */
body:has(.hmi-main-screen) .desktop-nav,
body:has(.hmi-main-screen) .header-cta,
body:has(.hmi-main-screen) .hamburger {
  display: none;
}

/* Show hamburger on mobile for main menu page */
@media (max-width: 767px) {
  body:has(.hmi-main-screen) .hamburger {
    display: flex;
  }
}

/* ── Menu Area ── */
.hmi-menu-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 8px 12px;
  gap: 0;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  overflow: hidden;
}

/* ── Split Layout: buttons left, diagram right ── */
.hmi-split-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 8px;
  flex: 1;
  min-height: 0;
}

/* ── Section Labels — Pink/Magenta like Delta HMI ── */
.hmi-section-label {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 2px 6px;
  background: rgba(201, 162, 39, 0.15);
  border-left: 3px solid var(--color-accent);
  display: inline-block;
  margin-bottom: 6px;
}

/* ── Controls Panel (Left) ── */
.hmi-controls-panel {
  display: flex;
  flex-direction: column;
}

/* ── Service Button Grid — 2 columns, stacked vertically ── */
.hmi-btn-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 5px;
  flex: 1;
}

.hmi-btn-lg {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px 6px;
  background: var(--hmi-btn-inactive);
  color: #FFFFFF;
  font-family: var(--font-display);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  line-height: 1.3;
  cursor: pointer;
  border: 4px solid;
  border-top-color: var(--hmi-bevel-light);
  border-left-color: var(--hmi-bevel-light);
  border-bottom-color: var(--hmi-bevel-dark);
  border-right-color: var(--hmi-bevel-dark);
  transition: none;
}

.hmi-btn-lg svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.hmi-btn-lg:hover {
  background: #5C6C82;
  box-shadow: none;
}

.hmi-btn-lg:active {
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  padding: 11px 5px 9px 7px;
  box-shadow: none;
  transform: none;
}

/* Accent button — Cyan */
.hmi-btn-lg--accent {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-top-color: var(--hmi-bevel-light-strong);
  border-left-color: var(--hmi-bevel-light-strong);
  border-bottom-color: var(--hmi-bevel-dark-strong);
  border-right-color: var(--hmi-bevel-dark-strong);
}

.hmi-btn-lg--accent svg {
  color: var(--color-text-on-primary);
}

.hmi-btn-lg--accent:hover {
  background: var(--color-primary-hover);
  box-shadow: none;
}

/* Gold highlight button variant */
.hmi-btn-lg--gold {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-top-color: #E0C060;
  border-left-color: #E0C060;
  border-bottom-color: #6A5010;
  border-right-color: #6A5010;
}

.hmi-btn-lg--gold svg {
  color: var(--color-text-on-primary);
}

.hmi-btn-lg--gold:hover {
  background: var(--color-primary-hover);
}

/* ── Diagram Panel (Right) ── */
.hmi-diagram-panel {
  display: flex;
  flex-direction: column;
  gap: 6px;
  /* Sunken screen area */
  background: #06101E;
  border: 3px solid;
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  padding: 8px;
  overflow: hidden;
}

/* ── Schematic Area ── */
.hmi-schematic-area {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: stretch;
  border: 2px solid var(--hmi-panel-border);
  background: #08162C;
}

.hmi-schematic-svg {
  width: 100%;
  height: 100%;
}

/* ── Readouts (inside diagram panel) ── */
.hmi-readouts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  flex-shrink: 0;
}

.hmi-readout {
  background: #050E1E;
  border: 2px solid;
  border-top-color: var(--hmi-bevel-dark);
  border-left-color: var(--hmi-bevel-dark);
  border-bottom-color: var(--hmi-bevel-light);
  border-right-color: var(--hmi-bevel-light);
  padding: 5px 6px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.hmi-readout-label {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  color: var(--color-accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hmi-readout-value {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.hmi-readout-value a {
  color: var(--color-primary);
  text-decoration: none;
}

.hmi-readout-value a:hover {
  color: #FFFFFF;
}

/* ── HMI Bottom Navigation Bar — Like Delta bottom bar ── */
.hmi-bottom-bar {
  display: flex;
  gap: 4px;
  padding: 6px 10px;
  background: #0A1830;
  border-top: 3px solid var(--hmi-panel-border);
  flex-shrink: 0;
}

.hmi-bottom-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 6px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  text-align: center;
  background: #2A4068;
  color: #C0D0E0;
  /* Thick Win98 bevel */
  border: 3px solid;
  border-top-color: #4A6090;
  border-left-color: #4A6090;
  border-bottom-color: #0A1830;
  border-right-color: #0A1830;
  transition: none;
  cursor: pointer;
}

.hmi-bottom-btn:hover {
  background: #3A5080;
  color: #FFFFFF;
}

.hmi-bottom-btn:active {
  border-top-color: #0A1830;
  border-left-color: #0A1830;
  border-bottom-color: #4A6090;
  border-right-color: #4A6090;
  padding: 11px 5px 9px 7px;
}

.hmi-bottom-btn--active {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-top-color: var(--hmi-bevel-light-strong);
  border-left-color: var(--hmi-bevel-light-strong);
  border-bottom-color: var(--hmi-bevel-dark-strong);
  border-right-color: var(--hmi-bevel-dark-strong);
}

.hmi-bottom-btn--accent {
  background: var(--color-accent);
  color: var(--color-text-on-primary);
  border-top-color: #E0C060;
  border-left-color: #E0C060;
  border-bottom-color: #6A5010;
  border-right-color: #6A5010;
}

.hmi-bottom-btn--accent:hover {
  background: var(--color-accent-hover);
  box-shadow: none;
}

/* ── Sub-page bottom bar ── */
.hmi-page-bottom-bar {
  display: flex;
  gap: 4px;
  padding: 6px 10px;
  background: #0A1830;
  border-top: 3px solid var(--hmi-panel-border);
  position: sticky;
  bottom: 0;
  z-index: var(--z-sticky);
}

/* ── Responsive: HMI Main Screen ── */

/* Tablet: stack diagram below buttons */
@media (max-width: 900px) {
  .hmi-split-layout {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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

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

  .hmi-schematic-area {
    min-height: 200px;
  }
}

@media (max-width: 767px) {
  .hmi-main-screen {
    height: auto;
    min-height: calc(100vh - 60px);
    overflow-y: auto;
  }

  .hmi-split-layout {
    grid-template-columns: 1fr;
  }

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

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

  .hmi-schematic-area {
    min-height: 180px;
  }

  .hmi-menu-area {
    padding: 6px 6px;
  }

  .hmi-btn-lg {
    padding: 10px 4px;
    font-size: 0.5625rem;
    border-width: 3px;
  }

  .hmi-btn-lg svg {
    width: 18px;
    height: 18px;
  }

  .hmi-bottom-bar,
  .hmi-page-bottom-bar {
    flex-wrap: wrap;
    padding: 4px 6px;
  }

  .hmi-bottom-btn {
    font-size: 0.625rem;
    padding: 8px 4px;
    letter-spacing: 0.04em;
    border-width: 3px;
  }
}

/* Bezel adjustments for main screen */
@media (min-width: 1200px) {
  .hmi-main-screen {
    height: calc(100vh - 110px);
  }
}

/* ══════════════════════════════════════════════
   INTERACTIVE GAMIFICATION ELEMENTS
   ══════════════════════════════════════════════ */

/* ── Alarm LED variants ─────────────────────── */
.hmi-led--amber {
  background-color: #FFD600;
  box-shadow: 0 0 4px #FFD600;
}
.hmi-led--red {
  background-color: #FF1744;
  box-shadow: 0 0 4px #FF1744;
}
.hmi-led--fast {
  animation: led-blink 0.4s step-start infinite !important;
}

/* ── Fault label in status bar ──────────────── */
.hmi-fault-label {
  font-family: var(--font-mono, 'Share Tech Mono', monospace);
  font-size: 0.6rem;
  color: #FF1744;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 6px;
  animation: led-blink 0.8s step-start infinite;
}

/* ── ACK button in status bar ───────────────── */
.hmi-ack-btn {
  font-family: var(--font-mono, 'Share Tech Mono', monospace);
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #001020;
  background-color: #FFD600;
  border: 2px solid;
  border-color: #FFF080 #806800 #806800 #FFF080;
  padding: 1px 8px;
  cursor: pointer;
  margin: 0 4px;
}
.hmi-ack-btn:hover { background-color: #FFE040; }
.hmi-ack-btn:active { border-color: #806800 #FFF080 #FFF080 #806800; }

/* ── E-STOP area (left panel) ───────────────── */
.hmi-estop-area {
  margin-top: 6px;
  display: flex;
  gap: 4px;
}

.hmi-btn-lg--estop {
  background-color: #AA0000;
  color: #FFFFFF;
  border-color: #FF4040 #500000 #500000 #FF4040;
  flex: 1;
}
.hmi-btn-lg--estop:hover  { background-color: #CC0000; }
.hmi-btn-lg--estop:active { border-color: #500000 #FF4040 #FF4040 #500000; background-color: #880000; }
.hmi-btn-lg--estop svg   { color: #FFFFFF; }

.hmi-btn-lg--reset {
  background-color: #006000;
  color: #FFFFFF;
  border-color: #40C040 #002000 #002000 #40C040;
  flex: 1;
}
.hmi-btn-lg--reset:hover  { background-color: #008000; }
.hmi-btn-lg--reset:active { border-color: #002000 #40C040 #40C040 #002000; }
.hmi-btn-lg--reset svg   { color: #FFFFFF; }

/* ── Interactive controls strip ─────────────── */
.hmi-control-strip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 6px;
  background-color: #050E1E;
  border-top: 2px solid #1A3060;
  border-left: 2px solid #0A1830;
  border-bottom: 2px solid #2A4A70;
  border-right: 2px solid #2A4A70;
  flex-shrink: 0;
}

.hmi-ctrl-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.hmi-ctrl-label {
  font-family: var(--font-mono, 'Share Tech Mono', monospace);
  font-size: 0.5rem;
  color: #C9A227;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.hmi-ctrl-divider {
  width: 2px;
  height: 32px;
  background-color: #2A4A70;
  flex-shrink: 0;
  margin: 0 2px;
}

/* ── Pushbutton controls ─────────────────────── */
.hmi-ctrl-btn {
  font-family: var(--font-display, 'Orbitron', sans-serif);
  font-size: 0.5rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 8px;
  border: 3px solid;
  cursor: pointer;
  white-space: nowrap;
  transition: none;
}
.hmi-ctrl-btn:active { padding: 5px 7px 3px 9px; }

.hmi-ctrl-btn--start {
  background-color: #004800;
  color: #00E676;
  border-color: #40C040 #002000 #002000 #40C040;
}
.hmi-ctrl-btn--start:hover { background-color: #006000; }

.hmi-ctrl-btn--stop {
  background-color: #6A0000;
  color: #FF8080;
  border-color: #FF6060 #300000 #300000 #FF6060;
}
.hmi-ctrl-btn--stop:hover { background-color: #880000; }

.hmi-ctrl-btn--valve-open {
  background-color: #5A4000;
  color: #FFD600;
  border-color: #FFD600 #2A1800 #2A1800 #FFD600;
}
.hmi-ctrl-btn--valve-open:hover { background-color: #7A5800; }

.hmi-ctrl-btn--valve-closed {
  background-color: #2A3A50;
  color: #C0D0E0;
  border-color: #6A7A90 #1A2A40 #1A2A40 #6A7A90;
}
.hmi-ctrl-btn--valve-closed:hover { background-color: #3A4A60; }

/* ── Mode selector ───────────────────────────── */
.hmi-mode-selector {
  display: flex;
  gap: 0;
}

.hmi-mode-btn {
  font-family: var(--font-display, 'Orbitron', sans-serif);
  font-size: 0.5rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 8px;
  border: 3px solid;
  cursor: pointer;
  background-color: #2A3A50;
  color: #506880;
  border-color: #6A7A90 #1A2A40 #1A2A40 #6A7A90;
}
.hmi-mode-btn:first-child { border-right-width: 1px; }
.hmi-mode-btn:last-child  { border-left-width: 1px; }

.hmi-mode-btn--active-auto {
  background-color: #003050;
  color: #00C8FF;
  border-color: #00A0E0 #001828 #001828 #00A0E0;
}
.hmi-mode-btn--active-man {
  background-color: #5A4000;
  color: #FFD600;
  border-color: #FFD600 #2A1800 #2A1800 #FFD600;
}

/* ── E-STOP / RESET in control strip ────────── */
.hmi-ctrl-btn--estop {
  background-color: #AA0000;
  color: #FFFFFF;
  border-color: #FF4040 #500000 #500000 #FF4040;
  font-size: 0.55rem;
}
.hmi-ctrl-btn--estop:hover  { background-color: #CC0000; }
.hmi-ctrl-btn--estop:active { border-color: #500000 #FF4040 #FF4040 #500000; }

.hmi-ctrl-btn--reset {
  background-color: #004800;
  color: #00E676;
  border-color: #40C040 #002000 #002000 #40C040;
  font-size: 0.55rem;
}
.hmi-ctrl-btn--reset:hover  { background-color: #006000; }
.hmi-ctrl-btn--reset:active { border-color: #002000 #40C040 #40C040 #002000; }

/* ── Cooling flow button ─────────────────────── */
.hmi-ctrl-btn--cooling-on {
  background-color: #003050;
  color: #00C8FF;
  border-color: #00A0E0 #001828 #001828 #00A0E0;
}
.hmi-ctrl-btn--cooling-on:hover { background-color: #004468; }

.hmi-ctrl-btn--cooling-off {
  background-color: #500010;
  color: #FF6060;
  border-color: #FF4040 #280008 #280008 #FF4040;
  animation: led-blink 1s step-start infinite;
}
.hmi-ctrl-btn--cooling-off:hover { background-color: #6A0018; }

/* ── Thermal accumulation bar ────────────────── */
.hmi-thermal-bar {
  width: 60px;
  height: 8px;
  background-color: #0A1830;
  border-top: 2px solid #1A2A40;
  border-left: 2px solid #1A2A40;
  border-bottom: 2px solid #2A4A70;
  border-right: 2px solid #2A4A70;
  overflow: hidden;
}
.hmi-thermal-bar-fill {
  height: 100%;
  width: 0%;
  background-color: #00C8FF;
  transition: background-color 0.5s;
}

/* ── Pressure Relief Valve button ────────────── */
.hmi-ctrl-btn--prv {
  background-color: #2A3A50;
  color: #C0D0E0;
  border-color: #6A7A90 #1A2A40 #1A2A40 #6A7A90;
}
.hmi-ctrl-btn--prv:hover { background-color: #3A4A60; }

.hmi-ctrl-btn--prv-alert {
  background-color: #5A3000;
  color: #FFD600;
  border-color: #FFD600 #2A1400 #2A1400 #FFD600;
  animation: prv-pulse 0.5s step-start infinite;
}
.hmi-ctrl-btn--prv-alert:hover { background-color: #7A4400; }

@keyframes prv-pulse {
  0%, 100% { background-color: #5A3000; color: #FFD600; }
  50%       { background-color: #FFD600; color: #001020; }
}

/* ── Responsive: hide strip on small screens ─── */
@media (max-width: 767px) {
  .hmi-control-strip { flex-wrap: wrap; }
  .hmi-ctrl-divider  { display: none; }
  .hmi-estop-area    { flex-direction: row; }

  /* Hide bottom nav bars on mobile — use hamburger instead */
  .hmi-page-bottom-bar,
  .hmi-bottom-bar { display: none; }
}