/* ==========================================================================
   LangTrack Marketing Site Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens
   -------------------------------------------------------------------------- */

:root {
  /* Colors */
  --color-bg-dark: #09090b;
  --color-bg-card: #111827;
  --color-bg-card-hover: #1f2937;
  --color-text-main: #ffffff;
  --color-text-muted: #a1a1aa;
  --color-text-subtle: #71717a;
  --color-border: rgba(136, 144, 195, 0.25);
  --color-border-hover: rgba(136, 144, 195, 0.4);
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-accent: #8b5cf6;
  --color-success: #22c55e;
  --color-warning: #f59e0b;

  /* Typography */
  --font-family: 'Figtree', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 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;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.1;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 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-normal: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --container-max: 1200px;
  --nav-height: 64px;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
}

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

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section {
  padding: var(--space-20) 0;
}

.section--lg {
  padding: var(--space-24) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

.section-header__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--nav-height);
}

.nav__logo {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  color: var(--color-text-main);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-text-main);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--color-text-main);
  color: var(--color-bg-dark);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-lg);
  transition: opacity var(--transition-fast);
}

.nav__cta:hover {
  opacity: 0.9;
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 24px;
  height: 24px;
  padding: 0;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text-main);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

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

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn--primary {
  background: var(--color-text-main);
  color: var(--color-bg-dark);
}

.btn--primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-border-hover);
  background: rgba(255, 255, 255, 0.05);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  transition: border-color var(--transition-fast);
}

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

.card--feature {
  text-align: center;
  padding: var(--space-8);
}

.card--feature__icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-4);
}

.card--feature__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.card--feature__desc {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* Pricing cards */
.card--pricing {
  display: flex;
  flex-direction: column;
}

.card--pricing__header {
  margin-bottom: var(--space-6);
}

.card--pricing__name {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-1);
}

.card--pricing__desc {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.card--pricing__price {
  margin-bottom: var(--space-6);
}

.card--pricing__amount {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
}

.card--pricing__period {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
}

.card--pricing__features {
  flex: 1;
  margin-bottom: var(--space-6);
}

.card--pricing__feature {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.card--pricing__feature::before {
  content: "";
  display: block;
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2322c55e'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-size: contain;
  flex-shrink: 0;
}

.card--pricing.featured {
  border-color: var(--color-primary);
  position: relative;
}

.card--pricing.featured::before {
  content: "Popular";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-primary);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */

.hero {
  padding: var(--space-16) 0 var(--space-20);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero__content {
  max-width: 560px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-8);
}

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

.hero__visual {
  position: relative;
}

.hero__image {
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   Social Proof / Stats
   -------------------------------------------------------------------------- */

.social-proof {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.social-proof__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.social-proof__item {
  padding: var(--space-4);
}

.social-proof__icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-3);
}

.social-proof__text {
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
}

/* --------------------------------------------------------------------------
   Features Grid
   -------------------------------------------------------------------------- */

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

/* --------------------------------------------------------------------------
   How It Works
   -------------------------------------------------------------------------- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  counter-reset: step;
}

.step {
  text-align: center;
  position: relative;
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
}

.step__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

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

/* --------------------------------------------------------------------------
   FAQ Accordion
   -------------------------------------------------------------------------- */

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-5) 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-main);
  text-align: left;
  cursor: pointer;
}

.faq-item__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
}

.faq-item__icon::before,
.faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 2px;
  background: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.faq-item__icon::before {
  transform: translate(-50%, -50%);
}

.faq-item__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.active .faq-item__icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.active .faq-item__answer {
  max-height: 500px;
}

.faq-item__answer p {
  padding-bottom: var(--space-5);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */

.cta-section {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.cta-section__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
}

.cta-section__subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-8);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.footer {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer__logo {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
}

.footer__links {
  display: flex;
  gap: var(--space-6);
}

.footer__link {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-text-main);
}

.footer__copy {
  width: 100%;
  text-align: center;
  padding-top: var(--space-8);
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-subtle);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */

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

.text-muted {
  color: var(--color-text-muted);
}

.mt-4 {
  margin-top: var(--space-4);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   Page-specific: Contact, Legal, 404
   -------------------------------------------------------------------------- */

.page-simple {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  flex-direction: column;
}

.page-simple__content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-5);
  text-align: center;
}

.page-simple__inner {
  max-width: 700px;
}

.page-simple__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-6);
}

.page-simple__text {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-8);
}

.page-simple__email {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-main);
}

/* Legal pages */
.legal-content {
  padding: var(--space-16) 0;
}

.legal-content h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-4);
}

.legal-content .last-updated {
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}

.legal-content h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.legal-content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: var(--line-height-relaxed);
}

.legal-content ul {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
  list-style: disc;
}

.legal-content li {
  margin-bottom: var(--space-2);
}

.legal-content a {
  color: var(--color-primary);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero__content {
    text-align: center;
    max-width: 100%;
  }

  .hero__ctas {
    justify-content: center;
  }

  .hero__title {
    font-size: var(--font-size-5xl);
  }

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

@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: var(--space-10);
    gap: var(--space-6);
    background: var(--color-bg-dark);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
  }

  .nav__links.active {
    transform: translateX(0);
  }

  .nav__toggle {
    display: flex;
  }

  .hero__title {
    font-size: var(--font-size-4xl);
  }

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

  .section-header__title {
    font-size: var(--font-size-3xl);
  }

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

  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .social-proof__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

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

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero__title {
    font-size: var(--font-size-3xl);
  }

  .hero__ctas {
    flex-direction: column;
    width: 100%;
  }

  .hero__ctas .btn {
    width: 100%;
  }

  .btn--lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
  }
}

/* --------------------------------------------------------------------------
   Pricing Grid
   -------------------------------------------------------------------------- */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}