/* ========================================
   ADVANCED BATTERY CONCEPTS
   Critical Infrastructure Design System
   ======================================== */

/* --- FONTS --- */
@import url('https://api.fontshare.com/v2/css?f[]=switzer@300,400,500,600,700&f[]=satoshi@300,400,500,700&display=swap');

/* --- DESIGN TOKENS --- */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 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;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Switzer', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

/* --- BASE THEME (Light body with dark header/hero) — Dark Slate + Military Industrial --- */
:root {
  --color-bg:             #E8E3D6;
  --color-surface:        #DDD8CA;
  --color-surface-2:      #D2CCBE;
  --color-surface-offset: #E2DDd0;
  --color-divider:        #C4BFB0;
  --color-border:         #BAB5A6;

  --color-text:           #1C2321;
  --color-text-muted:     #4A5240;
  --color-text-faint:     #7A7868;
  --color-text-inverse:   #E8E3D6;

  --color-primary:        #D4890A;
  --color-primary-hover:  #E89E20;
  --color-primary-active: #B87A0A;

  --color-accent:         #D4890A;
  --color-amber:          #D4890A;
  --color-accent-hover:   #E89E20;

  --color-error:          #8B3A3A;
  --color-success:        #00D910;

  --color-desert-tan:     #C5B99B;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
}

/* --- LIGHT MODE --- */
[data-theme="light"] {
  --color-bg:             #E8E3D6;
  --color-surface:        #DDD8CA;
  --color-surface-2:      #D2CCBE;
  --color-surface-offset: #E2DDd0;
  --color-divider:        #C4BFB0;
  --color-border:         #BAB5A6;

  --color-text:           #1C2321;
  --color-text-muted:     #4A5240;
  --color-text-faint:     #7A7868;
  --color-text-inverse:   #E8E3D6;

  --color-primary:        #D4890A;
  --color-primary-hover:  #E89E20;
  --color-primary-active: #B87A0A;

  --color-accent:         #B87A0A;
  --color-accent-hover:   #D4890A;

  --color-error:          #8B3A3A;
  --color-success:        #00D910;

  --color-desert-tan:     #C5B99B;

  --shadow-sm: 0 1px 2px rgba(26,31,23,0.08);
  --shadow-md: 0 4px 12px rgba(26,31,23,0.1);
  --shadow-lg: 0 12px 32px rgba(26,31,23,0.14);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #E8E3D6;
    --color-surface:        #DDD8CA;
    --color-surface-2:      #D2CCBE;
    --color-surface-offset: #E2DDD0;
    --color-divider:        #C4BFB0;
    --color-border:         #BAB5A6;
    --color-text:           #1C2321;
    --color-text-muted:     #4A5240;
    --color-text-faint:     #7A7868;
    --color-text-inverse:   #E8E3D6;
    --color-primary:        #D4890A;
    --color-primary-hover:  #E89E20;
    --color-primary-active: #B87A0A;
    --color-accent:         #B87A0A;
    --color-accent-hover:   #D4890A;
    --color-error:          #8B3A3A;
    --color-success:        #00D910;
    --color-desert-tan:     #C5B99B;
    --shadow-sm: 0 1px 2px rgba(26,31,23,0.08);
    --shadow-md: 0 4px 12px rgba(26,31,23,0.1);
    --shadow-lg: 0 12px 32px rgba(26,31,23,0.14);
  }
}

/* ========================================
   GLOBAL STYLES
   ======================================== */

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
a:hover { color: var(--color-accent-hover); }

.mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
  letter-spacing: 0.02em;
}

/* ========================================
   LAYOUT
   ======================================== */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

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

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.section--tight {
  padding-block: clamp(var(--space-8), 5vw, var(--space-16));
}

/* ========================================
   HEADER / NAV
   ======================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(28, 35, 33, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

[data-theme="light"] .site-header {
  background: rgba(232, 227, 214, 0.92);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  max-width: var(--content-wide);
  margin-inline: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo svg,
.logo .logo-img {
  height: 40px;
  width: auto;
  flex-shrink: 0;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.2;
}

.logo-text span {
  display: block;
  font-weight: 400;
  letter-spacing: 0.12em;
  font-size: 0.72em;
  color: var(--color-text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition-interactive);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

.nav-links .btn--primary {
  color: #E8E3D6;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-interactive);
  cursor: pointer;
}

.btn--primary {
  background: var(--color-primary);
  color: #E8E3D6;
  border: 1px solid var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn--outline:hover {
  border-color: var(--color-text-muted);
  background: var(--color-surface);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  border: none;
  padding-inline: var(--space-2);
}
.btn--ghost:hover {
  color: var(--color-accent-hover);
}

/* Mobile nav */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.3s var(--ease-out);
}

@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-4);
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: var(--space-2) 0; }
}

/* Theme toggle */
.theme-toggle {
  padding: var(--space-2);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-interactive);
}
.theme-toggle:hover { color: var(--color-text); }

/* ========================================
   HERO
   ======================================== */

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    var(--color-bg) 0%,
    rgba(28,35,33,0.85) 30%,
    rgba(28,35,33,0.4) 60%,
    rgba(28,35,33,0.2) 100%
  );
}

[data-theme="light"] .hero-bg::after {
  background: linear-gradient(
    to top,
    var(--color-bg) 0%,
    rgba(232,227,214,0.85) 30%,
    rgba(232,227,214,0.5) 60%,
    rgba(232,227,214,0.3) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-16) var(--space-4) var(--space-12);
  width: 100%;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  text-shadow: 0 1px 4px rgba(0,0,0,0.5), 0 0 12px rgba(0,0,0,0.3);
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 700;
  max-width: 18ch;
  margin-bottom: var(--space-4);
  line-height: 1.05;
  text-shadow: 0 1px 6px rgba(0,0,0,0.2);
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-bottom: var(--space-8);
  line-height: 1.5;
  text-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ========================================
   SPEC BAR
   ======================================== */

.spec-bar {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.spec-bar-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: var(--content-wide);
  margin-inline: auto;
}

.spec-item {
  padding: var(--space-6) var(--space-4);
  text-align: center;
  border-right: 1px solid var(--color-border);
}

.spec-item:last-child { border-right: none; }

.spec-value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.spec-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

@media (max-width: 768px) {
  .spec-bar-inner { grid-template-columns: repeat(2, 1fr); }
  .spec-item:nth-child(2) { border-right: none; }
}

/* ========================================
   SECTIONS
   ======================================== */

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  max-width: 20ch;
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.7;
}

/* ========================================
   ENVIRONMENTS GRID
   ======================================== */

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

.env-card {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.env-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}

.env-card:hover img {
  transform: scale(1.05);
}

.env-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,18,16,0.9) 0%, rgba(15,18,16,0.1) 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-6);
}

[data-theme="light"] .env-card-overlay {
  background: linear-gradient(to top, rgba(26,31,23,0.85) 0%, rgba(26,31,23,0.05) 60%);
}

.env-card-overlay .env-card-overlay-text {
  color: #D4CCBA;
}

.env-card-temp {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
  background: rgba(15, 18, 16, 0.75);
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.env-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: #D4CCBA;
  margin-bottom: var(--space-1);
  background: rgba(15, 18, 16, 0.65);
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.env-card-desc {
  font-size: var(--text-sm);
  color: rgba(212, 204, 186, 0.7);
  max-width: 30ch;
}

@media (max-width: 768px) {
  .env-grid { grid-template-columns: 1fr; }
  .env-card { aspect-ratio: 16/9; }
}

/* ========================================
   COMPARISON TABLE
   ======================================== */

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

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-8);
}

.comparison-table th {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-4);
  text-align: left;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text-muted);
}

.comparison-table th:first-child { color: var(--color-text); }

.comparison-table td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-base);
}

.comparison-table td:first-child {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--color-text-muted);
}

.comparison-table .abc-col {
  color: var(--color-accent);
  font-weight: 500;
}

.comparison-table .lithium-col {
  color: var(--color-text-muted);
}

.comparison-table tr:hover {
  background: var(--color-surface-2);
}

@media (max-width: 768px) {
  .comparison-table { font-size: var(--text-sm); }
  .comparison-table th, .comparison-table td { padding: var(--space-3) var(--space-2); }
}

@media (max-width: 480px) {
  .comparison-table { font-size: var(--text-xs); }
  .comparison-table th, .comparison-table td { padding: var(--space-2) var(--space-1); }
}

/* ========================================
   FULL-WIDTH IMAGE BREAK
   ======================================== */

.image-break {
  position: relative;
  width: 100%;
  height: 50vh;
  min-height: 300px;
  overflow: hidden;
}

.image-break img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Aerial footprint image: show full image, not cropped */
.image-break--contain {
  height: auto;
  min-height: 0;
}

.image-break--contain img {
  height: auto;
  object-fit: contain;
}

/* Patents cutaway: taller to avoid cropping arrow */
.image-break--tall {
  height: 60vh;
  min-height: 420px;
}

.image-break--tall img {
  object-fit: contain;
  object-position: center;
  background: var(--color-bg);
}

.image-break-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 18, 16, 0.6);
}

[data-theme="light"] .image-break-overlay {
  background: rgba(26, 31, 23, 0.5);
}

.image-break-overlay .image-break-text {
  color: #D4CCBA;
}

.image-break-quote {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  text-align: center;
  color: #D4CCBA;
  max-width: 24ch;
  line-height: 1.1;
}

/* ========================================
   FEATURES / VALUE PROPS
   ======================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-10);
}

.feature-item {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.feature-icon {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.feature-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.feature-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

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

@media (max-width: 768px) {
  .features-grid { grid-template-columns: 1fr; }
  .features-grid--3col { grid-template-columns: 1fr; }
}

/* ========================================
   MICROGRID DESC BULLETS
   ======================================== */

.microgrid-desc ul {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
}

.microgrid-desc ul li {
  position: relative;
  padding-left: 1.4em;
  margin-bottom: var(--space-2);
}

.microgrid-desc ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #D4890A;
}

/* ========================================
   NEWS CARDS
   ======================================== */

.news-card {
  text-decoration: none;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-5);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s, box-shadow 0.2s;
}

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

@media (max-width: 600px) {
  .news-card {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

/* ========================================
   CTA SECTION
   ======================================== */

.cta-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.cta-section .section-title {
  margin-inline: auto;
}

.cta-section .section-desc {
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

/* ========================================
   TECHNOLOGY PAGE
   ======================================== */

.tech-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.tech-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.tech-spec-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.tech-spec-card .spec-value {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.tech-spec-card .spec-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: normal;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .tech-specs { grid-template-columns: 1fr; }
}

/* Architecture section */
.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  margin-top: var(--space-10);
}

.arch-visual {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.arch-visual img {
  width: 100%;
  height: auto;
}

.arch-text h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.arch-text p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.arch-text ul {
  list-style: none;
  padding: 0;
}

.arch-text ul li {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  display: flex;
  gap: var(--space-3);
}

.arch-text ul li::before {
  content: '\203A';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .arch-grid { grid-template-columns: 1fr; }
}

/* ========================================
   APPLICATIONS PAGE
   ======================================== */

.app-card-large {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: var(--space-8);
}

.app-card-large:nth-child(even) .app-card-image {
  order: 2;
}

.app-card-image {
  min-height: 400px;
}

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

.app-card-content {
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.app-card-content .section-label { margin-bottom: var(--space-3); }

.app-card-content h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

.app-card-content p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.app-card-specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.app-spec-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  letter-spacing: 0.04em;
}

@media (max-width: 768px) {
  .app-card-large { grid-template-columns: 1fr; }
  .app-card-large:nth-child(even) .app-card-image { order: 0; }
  .app-card-image { min-height: 250px; }
}

/* ========================================
   ABOUT PAGE
   ======================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.stat-card {
  text-align: center;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

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

.timeline {
  margin-top: var(--space-10);
  border-left: 2px solid var(--color-border);
  padding-left: var(--space-8);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) - 5px);
  top: 6px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.timeline-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.timeline-text strong {
  color: var(--color-text);
}

/* ========================================
   CONTACT PAGE
   ======================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  margin-top: var(--space-10);
}

.contact-form { display: flex; flex-direction: column; gap: var(--space-4); }

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

.form-group label {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  color: var(--color-text);
  transition: border-color var(--transition-interactive);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  outline: none;
}

.form-group textarea { resize: vertical; min-height: 120px; }

.contact-info h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.contact-info p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.contact-detail {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.contact-detail-value {
  font-size: var(--text-base);
}

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) var(--space-4) var(--space-8);
}

.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-top: var(--space-4);
  max-width: 35ch;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col ul li { margin-bottom: var(--space-2); }

.footer-col ul a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer-col ul a:hover { color: var(--color-text); }

.footer-bottom {
  max-width: var(--content-wide);
  margin-inline: auto;
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-bottom a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* ========================================
   PAGE HERO (interior pages)
   ======================================== */

.page-hero {
  padding-top: var(--space-16);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--color-border);
}

.page-hero .section-label { margin-bottom: var(--space-3); }

.page-hero .section-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

.page-hero .section-desc {
  max-width: 55ch;
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */

.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade { to { opacity: 1; } }

.reveal-up { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .reveal-up {
    clip-path: inset(100% 0 0 0);
    animation: reveal-clip linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

@keyframes reveal-clip { to { clip-path: inset(0 0 0 0); } }

/* ========================================
   UTILITY
   ======================================== */

/* ========================================
   PRODUCT LITERATURE DOWNLOADS
   ======================================== */

.lit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.lit-card {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-interactive), background var(--transition-interactive), transform var(--transition-interactive);
}

.lit-card:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-2);
  transform: translateY(-2px);
  color: inherit;
}

.lit-card-icon {
  flex-shrink: 0;
  color: var(--color-accent);
  margin-top: var(--space-1);
}

.lit-card-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.lit-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: var(--space-3);
}

.lit-card-filetype {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .lit-grid { grid-template-columns: 1fr; }
}

.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.mt-2 { margin-top: var(--space-2); }
.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); }

/* Bullet lists inside feature descriptions */
.feature-desc ul, .env-card-desc ul, .section-desc ul, .lit-card-desc ul {
  list-style: none; padding-left: 0; margin: 0.5em 0 0 0;
}
.feature-desc ul li, .env-card-desc ul li, .section-desc ul li, .lit-card-desc ul li {
  position: relative; padding-left: 1.2em; margin-bottom: 0.3em;
}
.feature-desc ul li::before, .env-card-desc ul li::before, .section-desc ul li::before, .lit-card-desc ul li::before {
  content: ""; position: absolute; left: 0; top: 0.55em;
  width: 5px; height: 5px; background: var(--color-primary); border-radius: 1px;
}

/* Hero bullet list */
.hero-bullets { list-style: none; padding: 0; margin: 0 0 var(--space-4) 0; }
.hero-bullets li { position: relative; padding-left: 1.4em; margin-bottom: 0.25em; }
.hero-bullets li::before { content: "\2013"; position: absolute; left: 0; color: var(--color-primary); font-weight: 600; }

/* Email gate form */
.email-gate-form input:focus { outline: 2px solid var(--color-primary); outline-offset: -1px; }

/* Override hero bullets to use dot bullet points instead of dashes */
.hero-bullets li::before { content: "\2022"; }

/* Extra space between hero subtitle and action buttons */
.hero-sub { margin-bottom: var(--space-6); }

/* Dark text on bright neon green buttons for readability */



/* White text on all green buttons */



/* All bullet point markers use neon green */
.feature-desc ul li::before, .env-card-desc ul li::before, .section-desc ul li::before, .lit-card-desc ul li::before,
ul li::before, .hero-bullets li::before {
  background: #D4890A !important;
}
.hero-bullets li::before { color: #D4890A !important; content: "\2022" !important; }

/* Standard list bullets in neon green */
ul li::marker { color: #D4890A; }

/* Revert button text to white on dark green */



/* All bullet point markers use neon orange */
.feature-desc ul li::before, .env-card-desc ul li::before, .section-desc ul li::before, .lit-card-desc ul li::before,
.hero-bullets li::before {
  background: #D4890A !important; color: #D4890A !important;
}
ul li::marker { color: #D4890A; }





















.feature-desc ul li::before, .env-card-desc ul li::before, 
.section-desc ul li::before, .lit-card-desc ul li::before {
  background: #D4890A !important;
}







/* === GREEN: Only buttons and nav === */
.btn--primary { color: #FFFFFF !important; }
.btn--primary:hover { color: #FFFFFF !important; }
.nav-links a.active { color: #D4890A !important; }
.nav-links a:hover { color: #D4890A !important; }

/* === AMBER: All text indicators, labels, specs, bullets === */
.spec-value { color: #D4890A; }
.stat-value { color: #D4890A; }
.section-label { color: #D4890A; }
.feature-icon { color: #D4890A; }
ul li::marker { color: #D4890A; }
.hero-bullets li::before { color: #D4890A; }
.feature-desc ul li::before, .env-card-desc ul li::before,
.section-desc ul li::before, .lit-card-desc ul li::before {
  background: #D4890A !important;
}
a:hover { color: #D4890A; }

/* Footer links turn amber on hover */
.site-footer a:hover { color: #D4890A !important; }


/* === Dark header and hero sections === */
.site-header {
  --color-bg: #1C2321;
  --color-text: #D4CCBA;
  --color-text-muted: #9CA396;
  background: #1C2321 !important;
  color: #D4CCBA;
}
.hero {
  --color-bg: #1C2321;
  --color-text: #D4CCBA;
  --color-text-muted: #9CA396;
  background: #1C2321;
  color: #D4CCBA;
}
.hero h1, .hero p, .hero .hero-label, .hero .hero-sub { color: #D4CCBA; }
.hero .hero-label { color: #D4890A !important; }
.hero .hero-sub { color: #9CA396; }
.site-footer {
  --color-bg: #E8E3D6;
  --color-text: #1C2321;
  --color-text-muted: #4A5240;
  background: #E8E3D6 !important;
  color: #1C2321;
}

/* Dark background for spec bar */
.spec-bar { background: #232B28 !important; color: #D4CCBA; }
.spec-bar .spec-value { color: #D4890A !important; }
.spec-bar .spec-label { color: #9CA396 !important; }

/* Image break sections stay dark */
.image-break { background: #1C2321; }
.image-break-overlay { color: #D4CCBA; }

/* Remove light header override */

/* Ensure dark text on light body backgrounds */
.section-title { color: #1C2321; }
.section-desc { color: #4A5240; }
.arch-text h3 { color: #1C2321; }
.arch-text p { color: #4A5240; }
.feature-title { color: #1C2321; }
.feature-desc, .feature-desc ul li { color: #4A5240; }

/* Keep nav links readable on dark header */
.nav-links a { color: #D4CCBA; }
.nav-links a:hover { color: #D4890A; }
.nav-links a.active { color: #D4890A !important; }

/* Footer links */
.site-footer a { color: #4A5240; }
.site-footer h4 { color: #1C2321; }

/* Comparison table on light bg */
.comparison-table { color: #1C2321; }
.abc-col { color: #3A5232; }
.lithium-col { color: #8B3A3A; }

/* Contact form on light bg */
.contact-form input, .contact-form select, .contact-form textarea {
  background: #FFFFFF; color: #1C2321; border-color: #C4BFB0;
}

/* Outline buttons on light bg */
.btn--outline { color: #1C2321; border-color: #1C2321; }
.btn--outline:hover { color: #D4890A; border-color: #D4890A; }

/* Footer cream colorway */
.footer-bottom { background: #DDD8CA !important; color: #4A5240 !important; }
.footer-bottom p { color: #4A5240 !important; }
.site-footer .footer-brand p { color: #4A5240; }
.site-footer a:hover { color: #D4890A !important; }

/* Ensure section labels are amber on light backgrounds */
.section .section-label { color: #D4890A !important; }

/* === MOBILE NAV FIX === */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #1C2321 !important;
    flex-direction: column;
    padding: 80px 24px 24px;
    transition: right 0.3s ease;
    z-index: 100;
    box-shadow: -4px 0 20px rgba(0,0,0,0.4);
  }
  .nav-links.open {
    right: 0;
  }
  .nav-links a {
    color: #D4CCBA !important;
    font-size: 16px;
    padding: 12px 0;
    border-bottom: 1px solid #3A4540;
    display: block;
  }
  .nav-links a:hover, .nav-links a.active {
    color: #D4890A !important;
  }
  .nav-links .btn--primary {
    margin-top: 16px;
    text-align: center;
  }
  .mobile-toggle {
    z-index: 101;
    position: absolute;
    right: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
  }
}

/* Smaller page section titles */
.section-title { font-size: clamp(1.4rem, 3vw, 2.2rem) !important; }
.page-hero .section-title, .page-hero h1 { font-size: clamp(1.6rem, 3.5vw, 2.5rem) !important; }