/* ============================================
   SpokenBiome — Website Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Primary palette — derived from tool screenshots */
  --color-primary: #3B82F6;
  --color-primary-dark: #2563EB;
  --color-primary-light: #60A5FA;
  --color-accent-green: #10B981;
  --color-accent-green-dark: #059669;
  --color-warm-coral: #F97316;
  --color-magenta: #EC4899;
  --color-purple: #8B5CF6;
  --color-gold: #EAB308;

  /* Neutrals */
  --color-text: #1E293B;
  --color-text-secondary: #475569;
  --color-text-light: #94A3B8;
  --color-bg-white: #FFFFFF;
  --color-bg-light: #F8FAFC;
  --color-bg-alt: #F1F5F9;
  --color-bg-dark: #0F172A;
  --color-bg-dark-card: #1E293B;
  --color-border: #E2E8F0;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --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;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-padding: 1.5rem;
  --nav-height: 4rem;

  /* Borders & Shadows */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-4xl) 0;
}

.section--light {
  background-color: var(--color-bg-light);
}

.section--dark {
  background-color: var(--color-bg-dark);
  color: #FFFFFF;
}

.section--hero {
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-4xl);
  background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-bg-white) 50%, var(--color-bg-alt) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

/* --- Grid System --- */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

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

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

@media (min-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.grid--4 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav--scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  z-index: 1001;
}

.nav__logo-text {
  font-size: var(--font-size-xl);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav__logo-text strong {
  font-weight: 700;
  color: var(--color-primary);
}

/* --- Theme Toggle --- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: color 0.3s, border-color 0.3s, background 0.3s;
  z-index: 1001;
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.theme-toggle__moon {
  display: none;
}

[data-theme="dark"] .theme-toggle__sun {
  display: none;
}

[data-theme="dark"] .theme-toggle__moon {
  display: block;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.06);
}

.nav__link--cta {
  background: var(--color-primary);
  color: #FFFFFF !important;
  padding: var(--space-sm) var(--space-lg);
}

.nav__link--cta:hover {
  background: var(--color-primary-dark) !important;
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
  padding: 0;
}

.nav__hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__hamburger--active .nav__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger--active .nav__hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav__hamburger--active .nav__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 767px) {
  .nav__hamburger {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-md);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    padding: var(--space-xl);
  }

  .nav__menu--open {
    transform: translateX(0);
  }

  .nav__link {
    font-size: var(--font-size-lg);
    padding: var(--space-md) var(--space-lg);
    text-align: center;
  }

  .nav__link--cta {
    margin-top: var(--space-md);
  }
}

/* --- Section Headers --- */
.section__header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-3xl);
}

.section__label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.section--dark .section__label {
  color: var(--color-primary-light);
}

.section__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.section--dark .section__title {
  color: #FFFFFF;
}

.section__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 75ch;
  margin-left: auto;
  margin-right: auto;
}

.section--dark .section__description {
  color: var(--color-text-light);
}

@media (min-width: 768px) {
  .section__title {
    font-size: var(--font-size-4xl);
  }
}

@media (min-width: 1024px) {
  .section__title {
    font-size: var(--font-size-5xl);
  }
}

/* --- Hero --- */
.section--hero {
  position: relative;
  overflow: hidden;
}

.hero__content {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.hero__eyebrow {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
  padding: var(--space-xs) var(--space-lg);
  background: rgba(59, 130, 246, 0.08);
  border-radius: 100px;
  border: 1px solid rgba(59, 130, 246, 0.15);
}

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-xl);
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 50%, var(--color-magenta) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

@media (prefers-reduced-motion: reduce) {
  .hero__title-accent {
    animation: none;
  }
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
}

.btn--lg {
  padding: 0.875rem 2.25rem;
  font-size: var(--font-size-lg);
}

.hero__stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  padding: var(--space-lg) var(--space-2xl);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.hero__stat {
  text-align: center;
}

.hero__stat-number {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-primary);
}

.hero__stat-number sup {
  font-size: 0.55em;
  vertical-align: super;
}

.hero__stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero__stat-divider {
  width: 1px;
  height: 32px;
  background: var(--color-border);
}

.hero__visual {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}

/* Browser mockup */
.hero__browser-mockup {
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  box-shadow:
    0 25px 60px -12px rgba(0, 0, 0, 0.15),
    0 12px 28px -8px rgba(0, 0, 0, 0.1),
    0 0 0 1px var(--color-border);
  overflow: hidden;
  transform: perspective(1200px) rotateY(-1deg) rotateX(1deg);
  transition: transform var(--transition-slow);
  max-width: 100%;
}

.hero__browser-mockup:hover {
  transform: perspective(1200px) rotateY(0) rotateX(0);
}

.hero__browser-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.hero__browser-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
}

.hero__browser-dot:nth-child(1) { background: #FF5F56; }
.hero__browser-dot:nth-child(2) { background: #FFBD2E; }
.hero__browser-dot:nth-child(3) { background: #27C93F; }

.hero__browser-url {
  flex: 1;
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  background: var(--color-bg-white);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-left: 8px;
  margin-right: 40px;
  border: 1px solid var(--color-border);
}

.hero__image {
  display: block;
  width: 100%;
  border-radius: 0;
  box-shadow: none;
  border: none;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--font-size-5xl);
  }

  .hero__subtitle {
    font-size: var(--font-size-xl);
  }

  .hero__stat-number {
    font-size: var(--font-size-3xl);
  }

  .hero__stats {
    gap: var(--space-2xl);
  }
}

@media (min-width: 1024px) {
  .hero__title {
    font-size: var(--font-size-6xl);
  }
}

@media (max-width: 767px) {
  .hero__stat-divider {
    display: none;
  }

  .hero__stats {
    gap: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
  }

  .hero__browser-mockup {
    transform: none;
  }

  .hero__browser-mockup:hover {
    transform: none;
  }
}

/* --- Cards --- */
.card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: var(--color-bg-alt);
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.card__step {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  letter-spacing: 0.05em;
}

.card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.card__text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.card__role {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.card__tags li {
  font-size: var(--font-size-xs);
  font-weight: 500;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
}

/* Card variants */
.card--accent {
  border-top: 3px solid var(--color-primary);
}

.card--dark {
  background: var(--color-bg-dark-card);
  border-color: rgba(255, 255, 255, 0.1);
}

.card--dark .card__title {
  color: #FFFFFF;
}

.card--dark .card__text {
  color: var(--color-text-light);
}

.card--dark:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

/* Use Case card variants with specific accent colors */
.card--use-case {
  border-left: 4px solid var(--color-primary);
  position: relative;
}

.card--use-case-health {
  border-left-color: #EF4444;
}

.card--use-case-agriculture {
  border-left-color: var(--color-accent-green);
}

.card--use-case-environment {
  border-left-color: var(--color-primary);
}

.card--use-case-research {
  border-left-color: var(--color-purple);
}

/* Use case card icon row */
.card__icon-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.card__icon-row .card__title {
  margin-bottom: 0;
}

.card__unicode-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.card__unicode-icon--health {
  background: rgba(239, 68, 68, 0.1);
  color: #EF4444;
}

.card__unicode-icon--agriculture {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-accent-green);
}

.card__unicode-icon--environment {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
}

.card__unicode-icon--research {
  background: rgba(139, 92, 246, 0.1);
  color: var(--color-purple);
}

/* Bullet list for use case cards */
.card__bullet-list {
  margin-top: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.card__bullet-list li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding-left: var(--space-lg);
  position: relative;
}

.card__bullet-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-border);
}

.card--use-case-health .card__bullet-list li::before {
  background: #EF4444;
}

.card--use-case-agriculture .card__bullet-list li::before {
  background: var(--color-accent-green);
}

.card--use-case-environment .card__bullet-list li::before {
  background: var(--color-primary);
}

.card--use-case-research .card__bullet-list li::before {
  background: var(--color-purple);
}

/* Team card */
.card--team {
  text-align: center;
}

.card__avatar {
  display: block;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--space-lg);
}

/* --- Problem Section --- */
.section--problem {
  background-color: var(--color-bg-light);
}

.problem__cards .card--problem {
  border-left: 3px solid transparent;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.problem__cards .card--problem:hover {
  border-left-color: var(--color-primary);
}

.card__icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  color: #FFFFFF;
}

.card__icon-wrapper--red    { background: linear-gradient(135deg, #EF4444, #DC2626); }
.card__icon-wrapper--orange { background: linear-gradient(135deg, #F97316, #EA580C); }
.card__icon-wrapper--purple { background: linear-gradient(135deg, #8B5CF6, #7C3AED); }
.card__icon-wrapper--blue   { background: linear-gradient(135deg, #3B82F6, #2563EB); }

/* Before / After Contrast */
.problem__contrast {
  margin-top: var(--space-3xl);
  padding-top: var(--space-3xl);
  border-top: 1px solid var(--color-border);
}

.problem__contrast-title {
  text-align: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2xl);
  color: var(--color-text);
}

.problem__contrast-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: start;
}

@media (min-width: 768px) {
  .problem__contrast-grid {
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-lg);
    align-items: center;
  }
}

.problem__contrast-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-xs) var(--space-md);
  border-radius: 100px;
  margin-bottom: var(--space-md);
}

.problem__contrast-label--before {
  background: rgba(239, 68, 68, 0.1);
  color: #DC2626;
}

.problem__contrast-label--after {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
}

.problem__code-block {
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.problem__data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
}

.problem__data-table th {
  text-align: left;
  color: var(--color-text-light);
  font-weight: 600;
  padding: var(--space-xs) var(--space-md) var(--space-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.problem__data-table td {
  padding: var(--space-xs) var(--space-md);
  color: rgba(255, 255, 255, 0.75);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.problem__data-table td em {
  font-style: italic;
  color: rgba(255, 255, 255, 0.55);
}

.problem__data-table-fade td {
  color: rgba(255, 255, 255, 0.3);
  font-style: italic;
}

.problem__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

@media (max-width: 767px) {
  .problem__arrow {
    transform: rotate(90deg);
    margin: var(--space-sm) auto;
  }
}

.problem__narrative-block {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent-green);
}

.problem__narrative-text {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.problem__narrative-text:last-child {
  margin-bottom: 0;
}

.problem__narrative-text strong {
  color: var(--color-text);
  font-weight: 600;
}

.problem__narrative-text em {
  font-style: italic;
  color: var(--color-accent-green-dark);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

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

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

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

.btn--full {
  width: 100%;
}

/* --- Solution Section: Pipeline --- */
.pipeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
  position: relative;
  padding-left: var(--space-3xl);
}

.pipeline__step {
  position: relative;
}

.pipeline__number {
  position: absolute;
  left: calc(-1 * var(--space-3xl));
  top: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #FFFFFF;
  font-size: var(--font-size-base);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.pipeline__connector {
  position: absolute;
  left: calc(-1 * var(--space-3xl) + 19px);
  top: 40px;
  width: 2px;
  height: calc(100% + var(--space-xl));
  background: linear-gradient(to bottom, var(--color-primary-light), var(--color-border));
}

.pipeline__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

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

@media (min-width: 768px) {
  .pipeline {
    flex-direction: row;
    gap: 0;
    padding-left: 0;
    align-items: flex-start;
  }

  .pipeline__step {
    flex: 1;
    text-align: center;
    padding: 0 var(--space-md);
  }

  .pipeline__number {
    position: relative;
    left: auto;
    top: auto;
    margin: 0 auto var(--space-md);
    width: 48px;
    height: 48px;
    font-size: var(--font-size-lg);
  }

  .pipeline__connector {
    position: absolute;
    left: calc(50% + 24px);
    top: 24px;
    width: calc(100% - 48px);
    height: 2px;
    background: linear-gradient(to right, var(--color-primary-light), var(--color-border));
  }
}

/* --- Solution Section: Architecture & Pillars --- */
.solution__architecture {
  margin-bottom: var(--space-3xl);
}

.solution__figure {
  text-align: center;
}

.solution__image {
  border-radius: 0;
  box-shadow: none;
  border: none;
}

.solution__caption {
  margin-top: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-style: italic;
}

.solution__caption-html {
  margin-top: var(--space-xl);
  padding: var(--space-xl) var(--space-2xl);
  background: var(--color-bg-light);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  max-width: 75ch;
  margin-left: auto;
  margin-right: auto;
}

.solution__caption-html p {
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.solution__caption-html p:last-child {
  margin-bottom: 0;
}

.solution__caption-html p:first-child {
  font-size: var(--font-size-lg);
  color: var(--color-text);
}

.solution__caption-html em {
  color: var(--color-primary);
  font-style: normal;
  font-weight: 600;
}

.card--pillar {
  text-align: center;
}

.card__pillar-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  background: var(--color-bg-alt);
  margin: 0 auto var(--space-lg);
}

.card__pillar-icon svg {
  display: block;
}

/* --- Platform Section --- */
.platform__hero {
  margin-bottom: var(--space-3xl);
}

.platform__browser-frame {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  background: var(--color-bg-white);
}

.platform__browser-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.platform__browser-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
}

.platform__browser-dot:first-child {
  background: #FF5F57;
}

.platform__browser-dot:nth-child(2) {
  background: #FEBC2E;
}

.platform__browser-dot:nth-child(3) {
  background: #28C840;
}

.platform__browser-frame img {
  width: 100%;
  display: block;
}

.platform__features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.platform__feature {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.platform__feature:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.platform__feature-screenshot {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.platform__feature-screenshot img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: top left;
}

.platform__feature-info {
  padding: var(--space-lg) var(--space-xl);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.platform__feature-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.platform__feature-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
}

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

/* Stagger animation for platform features */
.platform__features .platform__feature:nth-child(1) { transition-delay: 0ms; }
.platform__features .platform__feature:nth-child(2) { transition-delay: 100ms; }
.platform__features .platform__feature:nth-child(3) { transition-delay: 200ms; }
.platform__features .platform__feature:nth-child(4) { transition-delay: 300ms; }

/* --- Pipeline Link --- */
.pipeline__link {
  color: var(--color-primary);
  font-weight: 600;
  transition: color var(--transition-fast);
}
.pipeline__link:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* --- Knowledge Space Section --- */
.ks__preview {
  margin-bottom: var(--space-3xl);
}

.ks__browser-frame {
  display: block;
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #0a0f1a;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
  cursor: pointer;
}

.ks__browser-frame:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.ks__browser-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.ks__browser-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}
.ks__browser-dot:first-child { background: #EF4444; opacity: 0.7; }
.ks__browser-dot:nth-child(2) { background: #EAB308; opacity: 0.7; }
.ks__browser-dot:nth-child(3) { background: #22C55E; opacity: 0.7; }

.ks__browser-url {
  margin-left: auto;
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-family: var(--font-family);
}

.ks__image {
  display: block;
  width: 100%;
  height: auto;
}

.ks__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.5);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.ks__browser-frame:hover .ks__overlay {
  opacity: 1;
}

.ks__overlay-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--color-primary);
  color: #fff;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
  letter-spacing: -0.01em;
}
.ks__overlay-btn svg {
  flex-shrink: 0;
}

.ks__features {
  gap: var(--space-xl);
}

.ks__feature {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.ks__feature-icon {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  margin: 0 auto var(--space-lg);
}
.ks__feature-icon--blue {
  background: #60A5FA;
  box-shadow: 0 0 20px rgba(96, 165, 250, 0.4), 0 0 60px rgba(96, 165, 250, 0.15);
}
.ks__feature-icon--amber {
  background: #F59E0B;
  border-radius: 3px;
  transform: rotate(45deg);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.4), 0 0 60px rgba(245, 158, 11, 0.15);
}
.ks__feature-icon--gradient {
  background: linear-gradient(135deg, #F97316, #8B5CF6);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.3), 0 0 60px rgba(249, 115, 22, 0.15);
}

.ks__feature-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #F1F5F9;
  margin-bottom: var(--space-sm);
}

.ks__feature-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- Why Now Timeline --- */
.why-now__timeline {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  padding-left: var(--space-3xl);
}

.why-now__timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: rgba(255, 255, 255, 0.15);
}

.why-now__item {
  position: relative;
  padding-bottom: var(--space-2xl);
}

.why-now__item:last-child {
  padding-bottom: 0;
}

.why-now__marker {
  position: absolute;
  left: calc(-1 * var(--space-3xl) + 6px);
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 3px solid;
  background: var(--color-bg-dark);
}

.why-now__marker--1 { border-color: var(--color-primary-light); }
.why-now__marker--2 { border-color: var(--color-purple); }
.why-now__marker--3 { border-color: var(--color-accent-green); }
.why-now__marker--4 { border-color: var(--color-warm-coral); }

.why-now__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: var(--space-sm);
}

.why-now__text {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.7;
}

@media (min-width: 768px) {
  .why-now__timeline {
    padding-left: var(--space-4xl);
  }

  .why-now__timeline::before {
    left: 18px;
  }

  .why-now__marker {
    left: calc(-1 * var(--space-4xl) + 10px);
  }
}

/* --- Team Section Enhanced --- */

.card__affiliation {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-md);
}

/* --- Team Advisory --- */
.team__advisory {
  text-align: center;
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.team__advisory-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-style: italic;
}

/* --- Vision Section --- */
.section--vision {
  background: linear-gradient(180deg, var(--color-bg-white) 0%, var(--color-bg-light) 100%);
}

.vision__pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

@media (min-width: 768px) {
  .vision__pillars {
    grid-template-columns: repeat(3, 1fr);
  }
}

.vision__pillar {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
}

.vision__pillar-icon {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.vision__pillar-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.vision__pillar-text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Vision Quotes */
.vision__quotes {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.quote {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-2xl);
  background: var(--color-bg-light);
  border-radius: var(--radius-xl);
  border-left: 4px solid var(--color-primary);
}

.quote--featured {
  background: var(--color-bg-alt);
  border-left-color: var(--color-accent-green);
}

.quote--founder {
  border-left-color: var(--color-warm-coral);
}

.quote--founder .quote__text {
  font-size: var(--font-size-2xl);
  font-weight: 600;
}

.quote__text {
  font-size: var(--font-size-xl);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.quote__cite {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-style: normal;
  font-weight: 500;
}

/* Vision Non-Profit Block */
.vision__nonprofit {
  text-align: center;
}

.vision__nonprofit-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: var(--space-2xl);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.vision__nonprofit-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.vision__nonprofit-text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Contact Section --- */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
}

@media (min-width: 768px) {
  .contact__grid {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-4xl);
  }
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  background: var(--color-bg-white);
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

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

@media (min-width: 480px) {
  .form__row {
    grid-template-columns: 1fr 1fr;
  }
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form__label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form__input {
  padding: 0.75rem 1rem;
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__input::placeholder {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

.form__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form__textarea {
  resize: vertical;
  min-height: 100px;
}

.form__select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%2394A3B8'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  justify-content: center;
}

.contact__info-card {
  padding: var(--space-xl);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.contact__info-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.contact__info-icon {
  display: inline-block;
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.contact__info-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.contact__email-link {
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--font-size-base);
  text-decoration: none;
}

.contact__email-link:hover {
  text-decoration: underline;
}

.contact__info-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Footer --- */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  align-items: center;
  text-align: center;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

@media (min-width: 768px) {
  .footer__content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__brand .nav__logo-text {
  color: #FFFFFF;
}

.footer__tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: var(--space-sm);
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: #FFFFFF;
}

.footer__bottom {
  text-align: center;
  padding-top: var(--space-xl);
  font-size: var(--font-size-sm);
}

/* --- Scroll Animations --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for children in grids */
.grid .card:nth-child(1) { transition-delay: 0ms; }
.grid .card:nth-child(2) { transition-delay: 100ms; }
.grid .card:nth-child(3) { transition-delay: 200ms; }
.grid .card:nth-child(4) { transition-delay: 300ms; }

/* --- Utility: Responsive section padding --- */
@media (min-width: 768px) {
  .section {
    padding: var(--space-5xl) 0;
  }

  .section--hero {
    padding-top: calc(var(--nav-height) + var(--space-4xl));
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  .animate-on-scroll {
    transition: none;
    opacity: 1;
    transform: none;
  }

  .card,
  .platform__feature,
  .contact__info-card,
  .hero__browser-mockup,
  .btn {
    transition: none;
  }

  html {
    scroll-behavior: auto;
  }

  .hero__title-accent {
    animation: none;
  }
}

/* --- Focus Visible for Keyboard Accessibility --- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

/* --- Skip to Content Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 9999;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: #FFFFFF;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

/* --- Print --- */
@media print {
  .nav,
  .nav__hamburger {
    display: none;
  }

  .section {
    padding: 2rem 0;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}

/* ============================================
   DARK MODE
   ============================================ */
[data-theme="dark"] {
  --color-text: #E2E8F0;
  --color-text-secondary: #94A3B8;
  --color-text-light: #64748B;
  --color-bg-white: #111827;
  --color-bg-light: #1A2332;
  --color-bg-alt: #1E293B;
  --color-bg-dark: #030712;
  --color-bg-dark-card: #1E293B;
  --color-border: #334155;
}

[data-theme="dark"] body {
  background: #111827;
  color: #E2E8F0;
}

[data-theme="dark"] .nav {
  background: rgba(17, 24, 39, 0.9);
}

[data-theme="dark"] .nav--scrolled {
  background: rgba(17, 24, 39, 0.95);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .nav__logo-text {
  color: #E2E8F0;
}

[data-theme="dark"] .nav__link {
  color: #94A3B8;
}

[data-theme="dark"] .nav__link:hover,
[data-theme="dark"] .nav__link--active {
  color: #E2E8F0;
}

[data-theme="dark"] .theme-toggle {
  color: #94A3B8;
  border-color: #334155;
}

[data-theme="dark"] .theme-toggle:hover {
  color: #EAB308;
  border-color: #EAB308;
}

[data-theme="dark"] .section {
  background: #111827;
}

[data-theme="dark"] .section--light {
  background: #1A2332;
}

[data-theme="dark"] .section--hero {
  background: linear-gradient(180deg, #111827 0%, #1A2332 100%);
}

[data-theme="dark"] .section--dark {
  background: #030712;
}

[data-theme="dark"] .section--vision {
  background: linear-gradient(135deg, #1A2332 0%, #111827 100%);
}

[data-theme="dark"] .section--problem {
  background: #1A2332;
}

[data-theme="dark"] .card,
[data-theme="dark"] .card--accent,
[data-theme="dark"] .card--problem,
[data-theme="dark"] .card--use-case,
[data-theme="dark"] .card--team,
[data-theme="dark"] .card--pillar {
  background: #1E293B;
  border-color: #334155;
}

[data-theme="dark"] .card__title {
  color: #E2E8F0;
}

[data-theme="dark"] .card__text {
  color: #94A3B8;
}

[data-theme="dark"] .section__title {
  color: #E2E8F0;
}

[data-theme="dark"] .section__label {
  color: var(--color-primary-light);
}

[data-theme="dark"] .section__description {
  color: #94A3B8;
}

[data-theme="dark"] .hero__title {
  color: #F1F5F9;
}

[data-theme="dark"] .hero__subtitle {
  color: #94A3B8;
}

[data-theme="dark"] .hero__stats {
  background: rgba(30, 41, 59, 0.8);
  border-color: #334155;
}

[data-theme="dark"] .hero__stat-number {
  color: #E2E8F0;
}

[data-theme="dark"] .hero__stat-label {
  color: #64748B;
}

[data-theme="dark"] .hero__browser-mockup,
[data-theme="dark"] .platform__browser-frame {
  border-color: #334155;
  background: #1E293B;
}

[data-theme="dark"] .hero__browser-bar,
[data-theme="dark"] .platform__browser-bar {
  background: #1E293B;
  border-color: #334155;
}

[data-theme="dark"] .hero__browser-url {
  color: #64748B;
}

[data-theme="dark"] .btn--ghost {
  color: #E2E8F0;
  border-color: #475569;
}

[data-theme="dark"] .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: #E2E8F0;
}

[data-theme="dark"] .hero__eyebrow {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-primary-light);
}

[data-theme="dark"] .problem__code-block {
  background: #030712;
}

[data-theme="dark"] .problem__narrative-block {
  background: #1E293B;
  border-color: #334155;
}

[data-theme="dark"] .problem__contrast-label--before {
  background: #374151;
  color: #94A3B8;
}

[data-theme="dark"] .solution__caption-html {
  background: #1E293B;
  border-left-color: var(--color-primary);
}

[data-theme="dark"] .solution__caption-html p {
  color: #94A3B8;
}

[data-theme="dark"] .solution__caption-html p:first-child {
  color: #E2E8F0;
}

[data-theme="dark"] .pipeline__number {
  background: var(--color-primary);
  color: #fff;
}

[data-theme="dark"] .pipeline__title {
  color: #E2E8F0;
}

[data-theme="dark"] .pipeline__text {
  color: #94A3B8;
}

[data-theme="dark"] .pipeline__link {
  color: var(--color-primary-light);
}

[data-theme="dark"] .platform__feature-screenshot img {
  border-color: #334155;
}

[data-theme="dark"] .why-now__title {
  color: #E2E8F0;
}

[data-theme="dark"] .why-now__text {
  color: #94A3B8;
}

[data-theme="dark"] .card__role {
  color: var(--color-primary-light);
}

[data-theme="dark"] .card__affiliation {
  color: #64748B;
}

[data-theme="dark"] .team__advisory-text {
  color: #94A3B8;
}

[data-theme="dark"] .vision__pillar-title {
  color: #E2E8F0;
}

[data-theme="dark"] .vision__pillar-text {
  color: #94A3B8;
}

[data-theme="dark"] .quote {
  background: #1E293B;
  border-color: #334155;
}

[data-theme="dark"] .quote__text {
  color: #E2E8F0;
}

[data-theme="dark"] .quote__cite {
  color: #64748B;
}

[data-theme="dark"] .vision__nonprofit-inner {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .vision__nonprofit-title {
  color: #E2E8F0;
}

[data-theme="dark"] .vision__nonprofit-text {
  color: #94A3B8;
}

[data-theme="dark"] .form__input,
[data-theme="dark"] .form__select,
[data-theme="dark"] .form__textarea {
  background: #1E293B;
  border-color: #334155;
  color: #E2E8F0;
}

[data-theme="dark"] .form__input::placeholder,
[data-theme="dark"] .form__textarea::placeholder {
  color: #475569;
}

[data-theme="dark"] .form__label {
  color: #94A3B8;
}

[data-theme="dark"] .contact__info-card {
  background: #1E293B;
  border-color: #334155;
}

[data-theme="dark"] .contact__info-card h3 {
  color: #E2E8F0;
}

[data-theme="dark"] .contact__info-card p {
  color: #94A3B8;
}

[data-theme="dark"] .footer {
  background: #030712;
  border-color: #1E293B;
}

[data-theme="dark"] .footer__tagline {
  color: #64748B;
}

[data-theme="dark"] .footer__links a {
  color: #64748B;
}

[data-theme="dark"] .footer__links a:hover {
  color: #E2E8F0;
}

[data-theme="dark"] .footer__bottom p {
  color: #475569;
}

[data-theme="dark"] .nav__link--cta {
  background: var(--color-primary);
  color: #fff;
}

[data-theme="dark"] .card__bullet-list li {
  color: #94A3B8;
}