/* ==========================================================================
   SCAMP THE ROBOT - RESPONSIVE DESIGN SYSTEM
   Modern, responsive, mobile-first stylesheet with Dark & Light theme support.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- Theme CSS Variables --- */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, Monaco, monospace;

  /* Default Dark Mode (Tech / Robotics aesthetic) */
  --bg-page: #0b0f19;
  --bg-page-gradient: radial-gradient(circle at 50% 0%, #172554 0%, #0b0f19 75%);
  --bg-surface: #131b2e;
  --bg-surface-elevated: #1a243b;
  --bg-surface-hover: #23304d;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-prominent: rgba(56, 189, 248, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent-primary: #38bdf8;
  --accent-primary-hover: #0ea5e9;
  --accent-primary-rgb: 56, 189, 248;
  --accent-secondary: #818cf8;
  --accent-glow: rgba(56, 189, 248, 0.2);

  --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border-subtle);
  --card-shadow-hover: 0 20px 35px -5px rgba(0, 0, 0, 0.6), 0 0 20px rgba(56, 189, 248, 0.25);

  --nav-bg: rgba(19, 27, 46, 0.92);
  --nav-backdrop: blur(14px);

  --code-bg: #070a12;
  --code-border: #1e293b;

  --badge-bg: rgba(56, 189, 248, 0.12);
  --badge-border: rgba(56, 189, 248, 0.3);
  --badge-text: #7dd3fc;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

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

/* Light Theme Variables */
[data-theme="light"] {
  --bg-page: #f1f5f9;
  --bg-page-gradient: radial-gradient(circle at 50% 0%, #e0f2fe 0%, #f1f5f9 70%);
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f8fafc;
  --bg-surface-hover: #f1f5f9;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-prominent: rgba(2, 132, 199, 0.35);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;

  --accent-primary: #0284c7;
  --accent-primary-hover: #0369a1;
  --accent-primary-rgb: 2, 132, 199;
  --accent-secondary: #4f46e5;
  --accent-glow: rgba(2, 132, 199, 0.15);

  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.08), 0 0 0 1px var(--border-subtle);
  --card-shadow-hover: 0 14px 28px -4px rgba(0, 0, 0, 0.12), 0 0 16px rgba(2, 132, 199, 0.15);

  --nav-bg: rgba(255, 255, 255, 0.94);
  --nav-backdrop: blur(14px);

  --code-bg: #1e293b;
  --code-border: #cbd5e1;

  --badge-bg: rgba(2, 132, 199, 0.08);
  --badge-border: rgba(2, 132, 199, 0.25);
  --badge-text: #0369a1;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  background-image: var(--bg-page-gradient);
  background-attachment: fixed;
  color: var(--text-secondary);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

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

a:hover, a:focus-visible {
  color: var(--accent-primary-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --- Container & Main Wrapper --- */
#main-wrapper,
.site-wrapper {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem 2.5rem;
  flex: 1 0 auto;
}

/* --- Top Utility Bar (Brand, Status, Theme Switcher) --- */
.top-utility-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.robot-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.theme-toggle-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-prominent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.theme-toggle-btn svg {
  width: 16px;
  height: 16px;
}

/* --- Hero Banner (#banner) --- */
#banner,
.site-hero-banner {
  background: linear-gradient(135deg, rgba(19, 27, 46, 0.95) 0%, rgba(15, 23, 42, 0.98) 100%);
  border: 1px solid var(--border-prominent);
  box-shadow: var(--card-shadow);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  position: relative;
  overflow: hidden;
}

[data-theme="light"] #banner,
[data-theme="light"] .site-hero-banner {
  background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 100%);
  border-color: rgba(2, 132, 199, 0.25);
}

#banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.banner-content {
  position: relative;
  z-index: 1;
  flex: 1;
}

.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

#banner h1,
#banner span,
.banner-title {
  display: block;
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-primary);
  background: linear-gradient(90deg, var(--text-primary) 0%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  padding: 0;
  margin: 0 0 0.5rem;
  width: auto;
}

.banner-subtitle {
  font-size: 0.98rem;
  color: var(--text-muted);
  max-width: 580px;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.banner-specs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.spec-chip {
  font-size: 0.75rem;
  padding: 0.25rem 0.65rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

[data-theme="light"] .spec-chip {
  background: rgba(0, 0, 0, 0.04);
}

.banner-image-wrapper {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

#banner img,
.banner-rover-img {
  width: 240px;
  height: 155px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-prominent);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 15px var(--accent-glow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  float: none !important;
}

.banner-image-wrapper:hover #banner img,
.banner-rover-img:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5), 0 0 25px var(--accent-primary);
}

/* --- Responsive Navigation System --- */
.site-nav-container {
  position: relative;
  margin-bottom: 1.5rem;
  z-index: 50;
}

/* Legacy .menu compatibility & Modern Wrapper */
.menu,
.responsive-navbar {
  width: 100% !important;
  height: auto !important;
  background: var(--nav-bg);
  backdrop-filter: var(--nav-backdrop);
  -webkit-backdrop-filter: var(--nav-backdrop);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  position: relative;
  font-family: var(--font-sans);
  padding: 0.35rem 0.75rem !important;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Mobile Navbar Header */
.nav-mobile-header {
  display: none; /* Shown on mobile */
  width: 100%;
  justify-content: space-between;
  align-items: center;
}

.nav-mobile-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-hamburger-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  padding: 0;
  transition: all var(--transition-fast);
}

.nav-hamburger-btn:hover,
.nav-hamburger-btn:focus-visible {
  background: var(--bg-surface-hover);
  border-color: var(--border-prominent);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}
.nav-hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Desktop Navigation Menu List */
.menu ul,
.nav-menu-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
  width: 100%;
}

.menu li,
.nav-item {
  float: none !important;
  width: auto !important;
  position: relative;
  list-style: none !important;
}

/* Top-level links */
.menu > ul > li > a,
.nav-link {
  display: inline-flex !important;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem !important;
  font-weight: 600 !important;
  color: var(--text-secondary) !important;
  background: transparent !important;
  border: 1px solid transparent !important;
  border-radius: var(--radius-sm) !important;
  padding: 0.5rem 0.9rem !important;
  height: auto !important;
  line-height: 1.4 !important;
  width: auto !important;
  text-decoration: none !important;
  transition: all var(--transition-fast) !important;
}

.menu > ul > li > a:hover,
.menu > ul > li > a:focus,
.menu > ul > li:hover > a,
.nav-link:hover,
.nav-link:focus,
.nav-item:hover > .nav-link {
  color: var(--accent-primary) !important;
  background: var(--bg-surface-hover) !important;
  border-color: var(--border-subtle) !important;
}

.menu > ul > li.active > a,
.nav-link.active {
  color: var(--accent-primary) !important;
  background: var(--badge-bg) !important;
  border-color: var(--badge-border) !important;
}

/* Dropdown Caret Icon */
.dropdown-caret {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--transition-fast);
  margin-left: 2px;
}

.nav-item:hover .dropdown-caret {
  transform: rotate(225deg) translateY(-2px);
}

/* Second-level Dropdowns (Desktop) */
.menu ul ul,
.nav-dropdown {
  position: absolute !important;
  top: 100% !important;
  left: 0 !important;
  min-width: 210px !important;
  width: auto !important;
  background: var(--bg-surface) !important;
  border: 1px solid var(--border-subtle) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--card-shadow) !important;
  padding: 0.45rem !important;
  margin: 0.35rem 0 0 0 !important;
  list-style: none !important;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  z-index: 100 !important;
  height: auto !important;
}

.menu li:hover > ul,
.nav-item:hover > .nav-dropdown,
.nav-item:focus-within > .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.menu ul ul li {
  width: 100% !important;
  float: none !important;
  margin-bottom: 2px;
}

.menu ul ul a,
.nav-dropdown-link {
  display: flex !important;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.85rem !important;
  font-size: 0.85rem !important;
  font-weight: 500 !important;
  color: var(--text-secondary) !important;
  background: transparent !important;
  border: 1px solid transparent !important;
  border-radius: var(--radius-sm) !important;
  height: auto !important;
  line-height: 1.4 !important;
  width: 100% !important;
  text-align: left;
  transition: all var(--transition-fast) !important;
}

.menu ul ul a:hover,
.menu ul ul a:focus,
.nav-dropdown-link:hover,
.nav-dropdown-link:focus {
  color: var(--accent-primary) !important;
  background: var(--bg-surface-hover) !important;
  border-color: var(--border-subtle) !important;
}

/* Third-level Dropdowns (Flyouts) */
.menu ul ul ul {
  top: 0 !important;
  left: 100% !important;
  margin-left: 0.35rem !important;
  margin-top: -0.45rem !important;
}

.menu ul ul li:hover > ul {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Hide empty menu placeholders */
.menu li > a[href="#"]:empty,
.menu li > a:contains(" ") {
  /* Clean up empty spacers */
}

/* --- Main Content Card (#main-content) --- */
#main-content,
.main-card {
  background: var(--bg-surface) !important;
  border: 1px solid var(--border-subtle) !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--card-shadow) !important;
  padding: 2.25rem 2.5rem !important;
  margin-top: 1.25rem !important;
  margin-bottom: 2rem !important;
  width: 100% !important;
  min-height: 400px !important;
  overflow: visible !important;
  box-sizing: border-box !important;
}

/* Typography Inside Main Content */
#main-content h1,
.page-title {
  color: var(--text-primary) !important;
  font-size: clamp(1.6rem, 3vw, 2.2rem) !important;
  font-weight: 700 !important;
  padding: 0 0 0.75rem 0 !important;
  margin: 0 0 1.5rem 0 !important;
  width: 100% !important;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#main-content h1::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 1.3em;
  background: linear-gradient(180deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  border-radius: var(--radius-full);
}

#main-content h2,
#main-content h3,
#main-content h4 {
  color: var(--text-primary) !important;
  width: 100% !important;
  margin: 1.75rem 0 0.75rem 0;
  font-weight: 600;
}

#main-content h2 { font-size: 1.35rem; }
#main-content h3 { font-size: 1.15rem; }
#main-content h4 { font-size: 1rem; }

#main-content p {
  color: var(--text-secondary) !important;
  font-size: 0.98rem !important;
  line-height: 1.75 !important;
  margin-bottom: 1.25rem !important;
  padding-bottom: 0 !important;
  width: 100% !important;
  max-width: 82ch;
}

/* Timeline & Log Entry Badges */
.timeline-entry {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 1.75rem;
  border-left: 2px solid var(--border-prominent);
}

.log-date,
#main-content p > b:first-child {
  display: inline-flex;
  align-items: center;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.6rem;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  font-weight: 600;
  margin-right: 0.5rem;
  letter-spacing: 0.02em;
}

/* Content Lists */
#main-content ul,
#main-content ol {
  padding-left: 1.5rem !important;
  margin-bottom: 1.5rem !important;
}

#main-content ul li,
#main-content ol li {
  color: var(--text-secondary) !important;
  font-size: 0.98rem !important;
  line-height: 1.65 !important;
  padding: 0.35rem 0 !important;
}

#main-content ul ul {
  margin-top: 0.35rem !important;
  margin-bottom: 0.5rem !important;
  padding-left: 1.5rem !important;
}

#main-content ul li::marker {
  color: var(--accent-primary);
}

/* --- Media Cards & Responsive Lightbox Triggers --- */
.media-card,
.img-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-elevated);
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: inline-block;
  max-width: 100%;
}

.media-card:hover,
.img-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--border-prominent);
}

.media-card img,
.img-card img {
  border-radius: 0 !important;
  border: none !important;
  margin: 0 !important;
  width: 100%;
  height: auto;
  cursor: zoom-in;
}

.media-caption {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.5rem 0.75rem;
  background: rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.media-caption svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--accent-primary);
}

/* Float Helpers with Clearfix and Mobile Auto-stack */
.media-float-left {
  float: left;
  margin: 0.5rem 1.75rem 1.25rem 0;
  max-width: 380px;
}

.media-float-right {
  float: right;
  margin: 0.5rem 0 1.25rem 1.75rem;
  max-width: 380px;
}

.clearfix::after,
#main-content::after {
  content: "";
  display: table;
  clear: both;
}

/* Backwards compatibility for existing inline styled images */
#main-content a img[style*="float: left"],
#main-content a img[style*="float:left"] {
  border: 1px solid var(--border-prominent) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--card-shadow) !important;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  cursor: zoom-in;
}

#main-content a img[style*="float: right"],
#main-content a img[style*="float:right"] {
  border: 1px solid var(--border-prominent) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--card-shadow) !important;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  cursor: zoom-in;
}

#main-content a img:hover {
  transform: scale(1.02);
  box-shadow: var(--card-shadow-hover) !important;
}

/* --- Responsive Code Window (#scroll-box modernization) --- */
#scroll-box,
.code-window-container {
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  max-height: 480px !important;
  float: none !important;
  margin: 1.5rem 0 !important;
  background: var(--code-bg) !important;
  border: 1px solid var(--code-border) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--card-shadow) !important;
  overflow: hidden !important;
  display: flex;
  flex-direction: column;
}

.code-window-header {
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.code-window-dots {
  display: flex;
  gap: 6px;
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #eab308; }
.dot-green { background: #22c55e; }

.code-window-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.copy-code-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.copy-code-btn:hover {
  background: var(--accent-primary);
  color: #000;
  border-color: var(--accent-primary);
}

.code-content-scroll {
  overflow: auto;
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  max-height: 420px;
}

.code-content-scroll pre {
  margin: 0;
  color: #e2e8f0;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-surface);
}
::-webkit-scrollbar-thumb {
  background: var(--border-prominent);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* --- Buttons & Action Links --- */
.btn-action,
.download-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--accent-primary);
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  text-decoration: none !important;
  margin: 0.35rem 0.25rem 0.35rem 0;
}

.btn-action:hover,
.download-chip:hover {
  background: var(--accent-primary);
  color: #0b0f19;
  border-color: var(--accent-primary);
  box-shadow: 0 4px 14px var(--accent-glow);
  transform: translateY(-2px);
}

/* --- Responsive Lightbox Modal --- */
.lightbox-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.lightbox-modal.is-active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content-wrapper {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: scale(0.92);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox-modal.is-active .lightbox-content-wrapper {
  transform: scale(1);
}

.lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.lightbox-caption {
  margin-top: 0.85rem;
  color: #e2e8f0;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: center;
  background: rgba(0, 0, 0, 0.6);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
}

.lightbox-close-btn {
  position: absolute;
  top: -45px;
  right: 0;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-close-btn:hover {
  background: var(--accent-primary);
  color: #000;
  transform: rotate(90deg);
}

/* --- Footer (#footer) --- */
#footer,
.site-footer {
  width: 100% !important;
  max-width: 1140px;
  margin: 0 auto !important;
  padding: 1.5rem 1.25rem 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: left !important;
}

.footer-brand {
  font-weight: 600;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

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

.back-to-top-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.back-to-top-btn:hover {
  color: var(--accent-primary);
  border-color: var(--border-prominent);
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES (TABLETS & PHONES)
   ========================================================================== */

/* --- Tablet / Small Laptop Breakpoint (max-width: 900px) --- */
@media (max-width: 900px) {
  #banner,
  .site-hero-banner {
    flex-direction: column;
    text-align: center;
    gap: 1.25rem;
    padding: 1.5rem;
  }

  .banner-subtitle {
    margin: 0 auto 1rem;
  }

  .banner-specs-tags {
    justify-content: center;
  }

  #banner img,
  .banner-rover-img {
    width: 200px;
    height: 130px;
  }

  .media-float-left,
  .media-float-right {
    float: none !important;
    margin: 1.25rem auto !important;
    display: block;
    max-width: 100%;
  }

  #main-content a img[style*="float: left"],
  #main-content a img[style*="float:left"],
  #main-content a img[style*="float: right"],
  #main-content a img[style*="float:right"] {
    float: none !important;
    margin: 1.25rem auto !important;
    display: block;
    max-width: 100% !important;
  }
}

/* --- Mobile Breakpoint (max-width: 768px) --- */
@media (max-width: 768px) {
  #main-wrapper,
  .site-wrapper {
    padding: 0.5rem 0.75rem 1.5rem;
  }

  .top-utility-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .nav-mobile-header {
    display: flex;
  }

  /* Transform Menu into Responsive Mobile Drawer */
  .menu,
  .responsive-navbar {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1rem !important;
  }

  .menu ul,
  .nav-menu-list {
    display: none; /* Controlled by aria-expanded in JS */
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    width: 100%;
    margin-top: 0.75rem !important;
    padding-top: 0.75rem !important;
    border-top: 1px solid var(--border-subtle);
  }

  .menu ul.is-open,
  .nav-menu-list.is-open {
    display: flex !important;
    animation: slideDownMenu 0.25s ease-out;
  }

  @keyframes slideDownMenu {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .menu li,
  .nav-item {
    width: 100% !important;
  }

  .menu > ul > li > a,
  .nav-link {
    width: 100% !important;
    justify-content: space-between;
    padding: 0.65rem 0.75rem !important;
    font-size: 0.95rem !important;
  }

  /* Submenus on Mobile */
  .menu ul ul,
  .nav-dropdown {
    position: static !important;
    display: none;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    box-shadow: none !important;
    background: var(--bg-surface-elevated) !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: var(--radius-sm) !important;
    margin: 0.25rem 0 0.5rem 0.75rem !important;
    padding: 0.35rem !important;
  }

  .menu ul ul.is-sub-open,
  .nav-dropdown.is-sub-open {
    display: block !important;
  }

  .menu ul ul ul {
    position: static !important;
    margin-left: 0.5rem !important;
  }

  /* Main Content on Mobile */
  #main-content,
  .main-card {
    padding: 1.35rem 1.15rem !important;
    border-radius: var(--radius-md) !important;
    margin-top: 0.75rem !important;
  }

  #main-content h1,
  .page-title {
    font-size: 1.5rem !important;
    margin-bottom: 1rem !important;
  }

  #footer,
  .site-footer {
    flex-direction: column;
    align-items: center;
    text-align: center !important;
    gap: 0.85rem;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* --- Small Mobile Phones (max-width: 480px) --- */
@media (max-width: 480px) {
  #banner,
  .site-hero-banner {
    padding: 1.25rem 1rem;
    border-radius: var(--radius-md);
  }

  #banner h1,
  #banner span,
  .banner-title {
    font-size: 1.65rem;
  }

  #banner img,
  .banner-rover-img {
    width: 100%;
    max-width: 240px;
    height: auto;
  }

  .spec-chip {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
  }
}