/* 
 * CSS Reset / Minimal Normalize
 */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* CSS Custom Properties */
:root {
  /* Palette: deep blue-black with cool accents */
  --color-primary: #4f8cff; /* interactive accent */
  --color-primary-dark: #3776e6;
  --color-secondary: #89a3bd;
  --color-text: #e6eef9; /* off-white with blue tint for readability */
  --color-text-light: #b7c7d9;
  --color-text-gray: #93a6bb;
  --color-bg: #071025; /* deep navy-black */
  --color-bg-alt: #0b1220; /* slightly lighter panel background */
  --color-bg-gray: #0f1724; /* card background */
  --color-bg-dark: #02040a; /* near-black */
  --color-surface: #081028; /* surfaces previously 'white' */
  --color-border: rgba(255, 255, 255, 0.06);
  --color-blue-50: rgba(79, 140, 255, 0.06);
  --color-blue-200: rgba(79, 140, 255, 0.12);
  --color-focus: #4f8cff;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  --font-size-7xl: 4.5rem;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  --container-max-width: 1280px;
  --border-radius: 0.5rem;
  --transition: 0.2s ease;
}

/* Base Styles */
html {
  scroll-behavior: smooth;
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
  width: 100%;
  box-sizing: border-box;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Typography */
h1,
h2,
h3 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover,
a:focus {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* Motion system: concise, accessible utilities */
:root {
  --motion-duration-sm: 175ms;
  --motion-duration-md: 300ms;
  --motion-ease: cubic-bezier(0.2, 0.1, 0.08, 1);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

/* Reusable utilities */
.fade-in {
  animation: fadeIn var(--motion-duration-md) var(--motion-ease) both;
  will-change: opacity;
}

.slide-up,
.fade-in-up {
  animation: slideUp var(--motion-duration-md) var(--motion-ease) both;
  will-change: transform, opacity;
}

/* Small stagger helper for grouped content */
.stagger > * {
  opacity: 0;
  transform: translateY(6px);
  animation: slideUp var(--motion-duration-md) var(--motion-ease) both;
}
.stagger > *:nth-child(1) {
  animation-delay: 60ms;
}
.stagger > *:nth-child(2) {
  animation-delay: 120ms;
}
.stagger > *:nth-child(3) {
  animation-delay: 180ms;
}
.stagger > *:nth-child(4) {
  animation-delay: 240ms;
}
.stagger > *:nth-child(5) {
  animation-delay: 300ms;
}

/* Hover lift for cards / interactive surfaces (very subtle) */
.hover-lift {
  transition: transform var(--motion-duration-sm) var(--motion-ease),
    box-shadow var(--motion-duration-sm) var(--motion-ease);
  transform: translateY(0);
}
.hover-lift:hover,
.hover-lift:focus {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
}

/* Smooth transitions for buttons/links */
.anim-smooth {
  transition: background-color var(--motion-duration-sm) var(--motion-ease),
    color var(--motion-duration-sm) var(--motion-ease),
    border-color var(--motion-duration-sm) var(--motion-ease),
    transform var(--motion-duration-sm) var(--motion-ease);
}

/* Respect user's reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .slide-up,
  .fade-in-up,
  .stagger > *,
  .hover-lift,
  .anim-smooth {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
  box-sizing: border-box;
  width: 100%;
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}
.mb-12 {
  margin-bottom: 3rem;
}
.mb-16 {
  margin-bottom: 4rem;
}
.mt-12 {
  margin-top: 3rem;
}

/* Header and Navigation */
.header {
  background-color: rgba(7, 16, 37, 0.6); /* dark translucent header */
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  transition: background-color var(--transition);
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.nav-logo {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text-light);
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-text);
  text-decoration: none;
}

.nav-link-active {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 60;
}

.hamburger {
  width: 25px;
  height: 3px;
  background-color: var(--color-text);
  transition: var(--transition);
}

/* Page Content */
.page-content {
  padding-top: 4rem;
  min-height: calc(100vh - 4rem);
}

.section-padding {
  padding: var(--spacing-2xl) 0;
}

.page-title {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-sm);
}

.page-subtitle {
  font-size: var(--font-size-2xl);
  color: var(--color-text-light);
  font-weight: 500;
}

.section-heading {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-xl);
  margin-left: 0;
  margin-right: 0;
  margin-top: 0;
  text-align: center;
  padding-left: 0;
  padding-right: 0;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: var(--spacing-2xl) var(--spacing-md);
  text-align: center;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.1) brightness(0.8);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(
      circle at 20% 20%,
      rgba(37, 99, 235, 0.2),
      transparent 30%
    ),
    radial-gradient(circle at 80% 10%, rgba(37, 99, 235, 0.18), transparent 32%),
    linear-gradient(
      180deg,
      rgba(17, 24, 39, 0.55) 0%,
      rgba(17, 24, 39, 0.25) 60%,
      rgba(17, 24, 39, 0.65) 100%
    );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 960px;
  margin: 0 auto;
}

.glass-card {
  background: transparent;
  border: none;
  box-shadow: none;
  border-radius: 18px;
  padding: var(--spacing-2xl);
}

.hero h1 {
  font-size: var(--font-size-7xl);
  margin-bottom: var(--spacing-md);
}

.hero-title {
  letter-spacing: -0.03em;
  animation: heroGlow 6s ease-in-out infinite;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0.95),
    rgba(191, 219, 254, 0.9),
    rgba(255, 255, 255, 0.95)
  );
  -webkit-background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: var(--font-size-3xl);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
}

.hero-subtitle-glow {
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  animation: floatPulse 5.5s ease-in-out infinite;
}

.hero-text {
  font-size: var(--font-size-2xl);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
}

.hero-text-small {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: var(--spacing-lg);
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.hero-cta:hover,
.hero-cta:focus {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

@keyframes heroGlow {
  0%,
  100% {
    text-shadow: 0 0 24px rgba(191, 219, 254, 0.55);
    filter: drop-shadow(0 10px 30px rgba(37, 99, 235, 0.28));
  }
  50% {
    text-shadow: 0 0 48px rgba(255, 255, 255, 0.9);
    filter: drop-shadow(0 16px 38px rgba(37, 99, 235, 0.36));
  }
}

@keyframes floatPulse {
  0%,
  100% {
    transform: translateY(0);
    opacity: 0.92;
  }
  50% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-weight: 600;
  text-align: center;
  transition: all var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
  font-size: var(--font-size-lg);
}

.btn-primary {
  background-color: var(--color-text);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--color-text-light);
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--color-border);
  color: var(--color-text-gray);
  background: var(--color-surface);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
}

.btn-outline:hover,
.btn-outline:focus {
  background-color: var(--color-bg-alt);
  text-decoration: none;
}

.btn-white {
  background-color: var(--color-surface);
  color: var(--color-text);
  padding: var(--spacing-md) var(--spacing-lg);
}

.btn-white:hover {
  background-color: var(--color-bg-alt);
}

/* Cards */
.card {
  background: var(--color-bg-gray);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.6);
}

.card-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
}

/* Team Section */
.team-section {
  padding: var(--spacing-2xl) 0;
  background: var(--color-surface);
  width: 100%;
  box-sizing: border-box;
  margin: 0;
  overflow-x: hidden;
}

.team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  width: 100%;
  margin: 0 auto;
  padding: 0;
  max-width: 100%;
  grid-auto-columns: minmax(0, 1fr);
}

.team-card {
  background: var(--color-surface);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.6);
  transition: box-shadow var(--transition);
  width: 100%;
  box-sizing: border-box;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  min-width: 0;
}

.team-card:hover {
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.6);
}

.team-avatar {
  width: 9rem;
  height: 9rem;
  margin: 0 auto var(--spacing-lg) auto;
  background: var(--color-bg-gray);
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  aspect-ratio: 1 / 1;
  clip-path: circle(50%);
}

.team-avatar img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
  object-position: center;
  display: block;
  margin: 0 !important;
  padding: 0 !important;
  border: none;
  outline: none;
  box-sizing: border-box;
  max-width: 100% !important;
  max-height: 100% !important;
}

.team-name {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  width: 100%;
}

.team-role {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  width: 100%;
}

/* Video Section */
.video-section {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg-alt);
}

.video-container {
  background: var(--color-surface);
  border-radius: var(--border-radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.video-placeholder {
  aspect-ratio: 16 / 9;
  background: var(--color-bg-gray);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.video-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
}

.video-text {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
}

.video-note {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* Sections Section */
.sections-section {
  padding: var(--spacing-2xl) 0;
  background: var(--color-surface);
}

.sections-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.section-card {
  background: var(--color-surface);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}

.section-card:hover {
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.7);
  transform: translateY(-6px);
}

.section-card-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

.section-card-text {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  flex-grow: 1;
}

/* Subtle hover/press lift for primary surfaces (only on hover-capable devices) */
@media (hover: hover) and (pointer: fine) {
  .section-card,
  .card,
  .decision-card,
  .team-card,
  .problem-box,
  .solution-box {
    transition: transform var(--motion-duration-sm) var(--motion-ease),
      box-shadow var(--motion-duration-sm) var(--motion-ease);
    will-change: transform, opacity;
  }

  .section-card:hover,
  .card:hover,
  .decision-card:hover,
  .team-card:hover,
  .problem-box:hover,
  .solution-box:hover,
  .section-card:focus-within,
  .card:focus-within,
  .decision-card:focus-within,
  .team-card:focus-within,
  .problem-box:focus-within,
  .solution-box:focus-within {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
  }
}

/* Scroll reveal helper (use .reveal on elements you want to reveal on scroll) */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  will-change: transform, opacity;
}
.reveal.in-view {
  animation: slideUp var(--motion-duration-md) var(--motion-ease) both;
}

/* Reduced motion fallback: show content immediately */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
    transition: none !important;
  }
}

/* Overview Page */
.overview-text {
  max-width: 56rem;
  margin: 0 auto var(--spacing-xl);
}

.overview-text p {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  line-height: 1.75;
  margin-bottom: var(--spacing-md);
}

.objectives-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.objective-card {
  background: var(--color-blue-50);
  border: 2px solid var(--color-blue-200);
  border-radius: 0.75rem;
  padding: var(--spacing-md);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.objective-card h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

.objective-card ul {
  list-style: none;
  padding: 0;
}

.objective-card li {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.objective-card li::before {
  content: "•";
  margin-right: var(--spacing-xs);
  font-weight: bold;
}

.diagrams-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.diagram-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.diagram-container {
  display: flex;
  justify-content: center;
}

.diagram-image {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Constrain large diagram images so they don't dominate the viewport */
.diagram-image--constrained {
  max-height: 60vh; /* keep image from taking the whole screen */
  width: auto; /* allow shrinking while preserving aspect ratio */
  max-width: 100%;
  object-fit: contain;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 640px) {
  .diagram-image--constrained {
    max-height: 40vh;
  }
}

.diagram-placeholder {
  background: var(--color-bg-gray);
  border-radius: var(--border-radius);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-placeholder p {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
}

.pdf-viewer {
  width: 100%;
  min-height: 600px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Financial Table */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

.financial-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
}

.financial-table thead {
  background: var(--color-bg-alt);
}

.financial-table th {
  padding: 1rem 1.5rem;
  text-align: left;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.financial-table .text-right {
  text-align: right;
}

.financial-table tbody tr {
  border-top: 1px solid var(--color-border);
}

.financial-table tbody tr:hover {
  background: var(--color-bg-alt);
}

.financial-table .category-header {
  background: var(--color-bg-gray);
  font-weight: 700;
}

.financial-table .category-header td {
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
}

.financial-table td {
  padding: 1rem 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text);
}

.financial-table .category-subtotal {
  background: var(--color-bg-alt);
}

.financial-table .category-subtotal td {
  font-weight: 600;
  padding: 0.75rem 1.5rem;
}

.financial-table tfoot {
  background: var(--color-bg-dark);
  color: white;
}

.financial-table tfoot td {
  color: white;
  padding: 1rem 1.5rem;
  font-weight: 600;
}

.financial-table tfoot tr:last-child td {
  font-size: var(--font-size-lg);
  font-weight: 700;
}

/* Design Process Page */
.design-overview {
  max-width: 56rem;
  margin: 0 auto var(--spacing-2xl);
}

.text-content {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  line-height: 1.75;
}

.text-content p {
  margin-bottom: var(--spacing-md);
}

.design-decisions {
  margin-top: var(--spacing-2xl);
}

.decision-cards {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.decision-card {
  background: var(--color-bg-gray);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.decision-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
}

.decision-header h3 {
  font-size: var(--font-size-2xl);
}

.decision-author {
  color: var(--color-text-light);
  font-size: 0.875rem;
  font-weight: 500;
}

.decision-card p {
  color: var(--color-text);
  line-height: 1.75;
}

/* Problem / Solution boxes used on the Software page and elsewhere */
.problem-box,
.solution-box {
  padding: var(--spacing-md);
  border-radius: calc(var(--border-radius) * 0.9);
  margin-top: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.problem-box {
  background: rgba(239, 68, 68, 0.08); /* subtle red tint for dark bg */
  border-left: 4px solid rgba(239, 68, 68, 0.9); /* red accent */
  color: var(--color-text);
  padding: var(--spacing-md);
  border-radius: calc(var(--border-radius) * 0.9);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.6);
}

.solution-box {
  background: rgba(16, 185, 129, 0.06); /* subtle green tint */
  border-left: 4px solid rgba(16, 185, 129, 0.9); /* green accent */
  color: var(--color-text);
  padding: var(--spacing-md);
  border-radius: calc(var(--border-radius) * 0.9);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.6);
}

/* Detail list (clean reset + custom bullet) */
.detail-list {
  list-style: none;
  padding-left: 0;
  margin-top: var(--spacing-md);
  margin-left: 0;
}

.detail-list li {
  /* strong reset to avoid native markers showing */
  list-style: none;
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
  line-height: 1.75;
  gap: 0.5rem; /* Ensure space between strong and following text */
  padding-left: 0;
  position: relative;
}

/* Hide native marker for browsers that ignore display:none on ::marker */
.detail-list li::marker {
  color: transparent;
  font-size: 0;
  width: 0;
  height: 0;
}

/* Custom bullet */
.detail-list li::before {
  content: "•";
  display: inline-block;
  width: 1.2rem;
  text-align: center;
  margin-right: calc(var(--spacing-md) - 0.25rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

/* Software Page */
.software-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

/* Make videos and embedded media inside the software page responsive and prevent overflow */
.software-grid video,
.software-grid iframe,
.software-grid embed,
.software-grid object {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.06);
  -webkit-font-smoothing: antialiased;
}

/* Ensure media elements don't cause horizontal scrolling on small screens */
.software-grid video {
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

/* Joystick layout */
.joystick-intro {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
}

.joystick-intro-text {
  flex: 1 1 0;
}

.joystick-image {
  flex: 0 0 auto;
}

.joystick-image img {
  max-width: 220px;
  width: 100%;
  height: auto;
  display: block;
}

.joystick-details {
  margin-top: var(--spacing-sm);
}

@media (max-width: 768px) {
  .joystick-intro {
    flex-direction: column;
    align-items: flex-start;
  }

  .joystick-image img {
    max-width: 180px;
  }
}

/* Generic diagram frame used on software page */
.diagram-frame {
  margin-top: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Improve placeholders used for future images/diagrams */
.diagram-placeholder {
  background: var(--color-bg-gray);
  border-radius: var(--border-radius);
  min-height: 260px;
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.diagram-placeholder p {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  max-width: 24rem;
}

/* Mechanical Page */
.mechanical-content {
  max-width: 1200px;
  margin: 0 auto;
}

.mechanical-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.card-subtitle {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

/* Footer */
.footer {
  background-color: var(--color-bg-dark);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.footer-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

.footer-description {
  color: #9ca3af;
  margin-bottom: var(--spacing-xl);
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

.footer-actions {
  margin-bottom: var(--spacing-xl);
}

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

.footer-copyright {
  color: #9ca3af;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-link {
  color: #9ca3af;
  transition: color var(--transition);
}

.footer-link:hover,
.footer-link:focus {
  color: white;
  text-decoration: underline;
}

.footer-scroll-top {
  margin-top: var(--spacing-lg);
  width: 3rem;
  height: 3rem;
  background: #1f2937;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition);
  color: white;
}

.footer-scroll-top:hover {
  background: #374151;
}

.footer-icon {
  width: 1.25rem;
  height: 1.25rem;
}

/* Responsive Design */
@media (min-width: 768px) {
  .hero h1 {
    font-size: var(--font-size-7xl);
  }

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

  .team-card {
    padding: var(--spacing-md);
  }

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

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

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

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

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

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
  }

  .team-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .team-card {
    padding: var(--spacing-md);
  }

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

@media (max-width: 1023px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 4rem;
    left: -100%;
    flex-direction: column;
    background-color: var(--color-surface);
    width: 100%;
    padding: var(--spacing-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    transition: left var(--transition);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-item {
    margin-bottom: var(--spacing-sm);
  }

  .nav-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
}

/* --- NEW STYLES FOR SOFTWARE PAGE --- */

/* Tech Stack Badges */
.tech-stack-container {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.tech-badge {
  background-color: var(--color-blue-50);
  color: var(--color-primary-dark);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid var(--color-blue-200);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.1);
}

/* Updated Decision Cards */
.decision-card {
  border-left: 5px solid var(--color-primary); /* Blue accent on left */
  transition: transform 0.2s ease;
}

.decision-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
}

.problem-box {
  margin-bottom: 1rem;
  color: var(--color-text-gray);
}

.solution-box {
  background: rgba(16, 185, 129, 0.06); /* subtle green tint for dark theme */
  border-left: 4px solid rgba(16, 185, 129, 0.9); /* green accent */
  border-radius: var(--border-radius);
  padding: 1rem 1.5rem;
  color: var(--color-text);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.6);
}

.solution-box strong {
  color: var(--color-primary);
}

.caption {
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Adjust software grid for better flow */
@media (min-width: 768px) {
  .software-grid {
    grid-template-columns: 1fr 1fr; /* Side by side text and image */
    align-items: center;
    gap: 3rem;
  }
}