:root {
  --bg-canvas: #141922;
  --bg-surface: #1e2530;
  --bg-surface-elevated: #283140;
  --bg-card: #1b212c;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --accent-primary: #a3e635;
  --accent-hover: #bef264;
  --border-slate: #334155;
  --border-lime: #a3e635;
  --radius-card: 20px;
  --radius-sm: 8px;
  --radius-btn: 0px;
  --font-heading: "Arial Narrow", "Helvetica Neue", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
  hyphens: auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--accent-hover);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); margin-bottom: 1.25rem; }
h2 { font-size: clamp(1.4rem, 3.5vw, 2.2rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
p { margin-bottom: 1.25rem; }

/* Header & Nav */
.site-header {
  position: relative;
  width: 100%;
  background: var(--bg-surface);
  border-bottom: 2px solid var(--border-slate);
  z-index: 100;
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-imprint {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-align: left;
}

.brand-icon {
  width: 24px;
  height: 24px;
  background-color: var(--accent-primary);
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  display: inline-block;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-primary);
}

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

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-primary);
  padding: 0.4rem 0.2rem;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-slate);
  color: var(--text-primary);
  font-size: 1.5rem;
  width: 42px;
  height: 42px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.mobile-drawer {
  display: none;
  background: var(--bg-surface-elevated);
  border-bottom: 2px solid var(--accent-primary);
  padding: 1.25rem 1.5rem;
  flex-direction: column;
  gap: 1rem;
}

.mobile-drawer.active {
  display: flex;
}

/* Structural Layouts */
.main-wrapper {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  flex: 1;
}

.reading-width {
  max-width: 72ch;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section */
.hero-block {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 4rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border-slate);
}

.hero-thesis {
  display: flex;
  flex-direction: column;
}

.hero-subtag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 0.85rem;
  display: inline-block;
}

.hero-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 180px);
  gap: 1rem;
}

.hero-img-box {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border-slate);
  position: relative;
}

.hero-img-box:first-child {
  grid-column: 1 / 3;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Stat & Telemetry Strips */
.telemetry-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-slate);
  border-radius: var(--radius-card);
  padding: 1.5rem 2rem;
  margin-bottom: 4rem;
}

.stat-item {
  border-left: 3px solid var(--accent-primary);
  padding-left: 1rem;
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--accent-primary);
  margin-bottom: 0.35rem;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Content Sections */
.section-panel {
  margin-bottom: 4.5rem;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 2px solid var(--border-slate);
  padding-bottom: 0.85rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-marker {
  font-family: var(--font-mono);
  color: var(--accent-primary);
  font-size: 0.9rem;
}

/* Cards & Grid */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.alpine-card {
  background: var(--bg-card);
  border: 1px solid var(--border-slate);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s var(--ease-kinetic), border-color 0.25s ease;
}

.alpine-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.4);
}

.card-marker-band {
  background: var(--accent-primary);
  color: #141922;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.35rem 1.25rem;
  position: absolute;
  top: 15px;
  right: 15px;
  border-radius: 4px;
  z-index: 2;
}

.card-image-wrap {
  width: 100%;
  height: 220px;
  position: relative;
  background-color: #0b0e14;
}

.card-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* Buttons */
.btn-alpine {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--accent-primary);
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-btn);
  padding: 0.85rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-alpine:hover {
  background-color: var(--accent-primary);
  color: #141922;
  box-shadow: 0 0 20px -3px var(--accent-primary);
}

.btn-inline {
  margin-top: auto;
  align-self: flex-start;
}

/* Equipment Matrix & Tables */
.table-container {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-slate);
  border-radius: var(--radius-card);
  background: var(--bg-surface);
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.matrix-table th {
  background-color: var(--bg-surface-elevated);
  font-family: var(--font-heading);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 1.1rem 1.25rem;
  border-bottom: 2px solid var(--accent-primary);
  color: var(--text-primary);
}

.matrix-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-slate);
  color: var(--text-primary);
}

.matrix-table tr:last-child td {
  border-bottom: none;
}

.matrix-table tr:hover td {
  background-color: rgba(163, 230, 53, 0.04);
}

/* Interactive Accordion / Drawer Tabs */
.drawer-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0;
}

.drawer-tab {
  border: 1px solid var(--border-slate);
  border-radius: var(--radius-card);
  background: var(--bg-surface);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.drawer-tab.open {
  border-color: var(--accent-primary);
}

.drawer-trigger {
  width: 100%;
  padding: 1.25rem 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1.15rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  text-align: left;
}

.drawer-icon {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent-primary);
  transition: transform 0.25s ease;
}

.drawer-tab.open .drawer-icon {
  transform: rotate(45deg);
}

.drawer-body {
  max-height: 0;
  overflow: hidden;
  padding: 0 1.75rem;
  transition: max-height 0.3s var(--ease-kinetic), padding 0.3s var(--ease-kinetic);
}

.drawer-tab.open .drawer-body {
  max-height: 800px;
  padding: 0 1.75rem 1.5rem 1.75rem;
}

/* Calculator Component */
.calc-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-slate);
  border-radius: var(--radius-card);
  padding: 2.5rem;
  margin: 2rem 0;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.calc-input, .calc-select {
  background: var(--bg-canvas);
  border: 1px solid var(--border-slate);
  color: var(--text-primary);
  padding: 0.85rem 1rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  border-radius: var(--radius-sm);
  outline: none;
}

.calc-input:focus, .calc-select:focus {
  border-color: var(--accent-primary);
}

.calc-output-box {
  background: var(--bg-canvas);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.calc-output-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px dashed var(--border-slate);
  padding-bottom: 0.5rem;
}

.calc-output-item:last-child {
  border-bottom: none;
}

.calc-output-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-primary);
  font-size: 1.3rem;
}

/* Contact / Dispatch Tool */
.dispatch-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: var(--bg-surface);
  padding: 2.5rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-slate);
}

.textarea-input {
  min-height: 130px;
  resize: vertical;
}

.btn-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.status-feedback {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  margin-top: 0.5rem;
  display: none;
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 2px solid var(--border-slate);
  padding: 3rem 1.5rem 2rem 1.5rem;
  margin-top: auto;
}

.footer-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
}

.footer-col h4 {
  margin-bottom: 1rem;
  color: var(--accent-primary);
  font-size: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--text-muted);
}
.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-slate);
  padding-top: 1.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Utilities */
.text-lime { color: var(--accent-primary); }
.border-panel {
  border: 1px solid var(--border-slate);
  border-radius: var(--radius-card);
  padding: 2rem;
  background: var(--bg-surface);
  margin-bottom: 2rem;
}
.diagram-box {
  background: #0d1117;
  border: 1px dashed var(--accent-primary);
  border-radius: var(--radius-card);
  padding: 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  margin: 1.5rem 0;
  overflow-x: auto;
}

/* Responsive */
@media (max-width: 860px) {
  .hero-block {
    grid-template-columns: 1fr;
  }
  .desktop-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .calc-card, .dispatch-form {
    padding: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}