/* ============================================
   SlidePerfect Landing Page Styles
   Design System: DESIGN-GUIDE.md
   Colors: Navy #0F172A + Mint #2DD4BF
   Fonts: Space Grotesk + Inter
   ============================================ */

:root {
  /* Colors - Navy + Mint Theme */
  --color-navy: #0F172A;
  --color-mint: #2DD4BF;
  --color-mint-strong: #14B8A6;
  --color-gray-50: #F8FAFC;
  --color-gray-100: #F1F5F9;
  --color-gray-200: #E2E8F0;
  --color-gray-400: #94A3B8;
  --color-gray-600: #475569;
  --color-white: #FFFFFF;
  
  /* Fonts */
  --font-brand: 'Space Grotesk', sans-serif;
  --font-sans: 'Inter', sans-serif;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 14px;
  --space-lg: 20px;
  --space-xl: 24px;
  --space-2xl: 36px;
  --space-3xl: 56px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 10px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  
  /* Animation */
  --duration-fast: 150ms;
  --duration-base: 200ms;
  --duration-slow: 300ms;
  --easing: cubic-bezier(0.4, 0, 0.2, 1);
  --easing-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================
   Base Styles
   ============================================ */

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-navy);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--duration-fast) var(--easing);
}

a:hover {
  opacity: 0.8;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  width: 100%;
}

/* ============================================
   Navigation
   ============================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--space-lg) 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-text {
  background: linear-gradient(135deg, var(--color-navy), var(--color-mint), var(--color-mint-strong));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  font-weight: 500;
  font-size: 13px;
  color: var(--color-gray-600);
}

.nav-links a:hover {
  color: var(--color-navy);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--duration-base) var(--easing);
  text-align: center;
  white-space: nowrap;
}

.btn:hover {
  opacity: 1;
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

/* Enhanced Primary Button Animation */
.btn-primary {
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.6s;
}

.btn-primary:hover::before {
  left: 100%;
}

/* Button Sizes */
.btn-sm {
  padding: 10px 16px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 24px;
  font-size: 14px;
}

.btn-xl {
  padding: 18px 32px;
  font-size: 16px;
}

/* Button Variants */
.btn-primary {
  background: linear-gradient(135deg, var(--color-navy), var(--color-mint), var(--color-mint-strong));
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-gray-200);
  color: var(--color-navy);
}

.btn-secondary:hover {
  border-color: var(--color-navy);
  background: var(--color-gray-50);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  padding: var(--space-3xl) 0;
  background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 14px;
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid var(--color-mint);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-mint-strong);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.95;
    transform: scale(1.02);
  }
}

.hero-title {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 48px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-navy);
  margin-bottom: var(--space-lg);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-mint), var(--color-mint-strong));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-gray-600);
  margin-bottom: var(--space-2xl);
  max-width: 540px;
}

/* Trust Signals Inline */
.trust-signals-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-gray-600);
}

.trust-item svg {
  color: var(--color-mint);
  flex-shrink: 0;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.cta-subtext {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 12px;
  color: var(--color-gray-600);
  margin-bottom: var(--space-2xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-200);
}

.cta-subtext svg {
  color: var(--color-mint);
  flex-shrink: 0;
}

.hero-stats {
  display: flex;
  gap: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-gray-200);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.stat strong {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 22px;
  color: var(--color-navy);
}

.stat span {
  font-size: 11px;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.demo-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  width: 100%;
  max-width: 500px;
}

.demo-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
}

.demo-card-dots {
  display: flex;
  gap: 6px;
}

.demo-card-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-gray-400);
}

.demo-card-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-gray-600);
}

.demo-card-content {
  padding: var(--space-2xl);
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.demo-slide {
  flex: 1;
  padding: var(--space-lg);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  position: relative;
}

.demo-slide-title {
  margin-bottom: var(--space-md);
}

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

.skeleton {
  height: 12px;
  background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
  background-size: 200% 100%;
  border-radius: var(--radius-sm);
}

.skeleton-title {
  height: 16px;
  width: 70%;
}

.skeleton-line {
  width: 100%;
}

.skeleton-line.short {
  width: 60%;
}

.skeleton.animated {
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.demo-translation-arrow {
  flex-shrink: 0;
  color: var(--color-mint);
}

.demo-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: var(--color-mint);
  border-radius: var(--radius-sm);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-white);
}

/* Chrome Web Store Badge */
.chrome-badge {
  margin-top: var(--space-2xl);
  padding: var(--space-lg);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xl);
  box-shadow: var(--shadow-md);
}

.chrome-badge-content {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.chrome-icon {
  color: var(--color-navy);
  flex-shrink: 0;
}

.chrome-badge-text {
  display: flex;
  flex-direction: column;
}

.chrome-badge-title {
  font-size: 11px;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.chrome-badge-store {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-navy);
}

.chrome-badge-rating {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding-left: var(--space-xl);
  border-left: 1px solid var(--color-gray-200);
}

.stars {
  font-size: 18px;
  color: #FFC107;
  letter-spacing: 2px;
}

.rating-text {
  font-size: 11px;
  color: var(--color-gray-600);
  margin-top: 4px;
}

/* ============================================
   Sections
   ============================================ */

.section {
  padding: var(--space-3xl) 0;
}

.section-alt {
  background: var(--color-gray-50);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 36px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-navy);
  margin-bottom: var(--space-md);
}

.section-description {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-600);
}

/* ============================================
   Features Grid
   ============================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.feature-card {
  padding: var(--space-xl);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  transition: all var(--duration-base) var(--easing);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
}

.feature-icon.mint {
  background: rgba(45, 212, 191, 0.1);
  color: var(--color-mint-strong);
}

.feature-title {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 18px;
  color: var(--color-navy);
  margin-bottom: var(--space-md);
}

.feature-description {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-gray-600);
}

/* ============================================
   Steps / How It Works
   ============================================ */

.steps {
  display: grid;
  gap: var(--space-2xl);
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-navy), var(--color-mint));
  color: var(--color-white);
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 20px;
  border-radius: var(--radius-full);
}

.step-content {
  flex: 1;
  padding-top: var(--space-sm);
}

.step-title {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 20px;
  color: var(--color-navy);
  margin-bottom: var(--space-sm);
}

.step-description {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-gray-600);
}

.cta-center {
  display: flex;
  justify-content: center;
  margin-top: var(--space-2xl);
}

/* ============================================
   Use Cases
   ============================================ */

.use-cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
}

.use-case {
  text-align: center;
  padding: var(--space-xl);
}

.use-case-icon {
  font-size: 48px;
  margin-bottom: var(--space-lg);
}

.use-case-title {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 18px;
  color: var(--color-navy);
  margin-bottom: var(--space-md);
}

.use-case-description {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-gray-600);
}

/* ============================================
   Trust & Security Section
   ============================================ */

.section-trust {
  background: var(--color-white);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.trust-card {
  padding: var(--space-xl);
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all var(--duration-base) var(--easing);
}

.trust-card:hover {
  border-color: var(--color-mint);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.trust-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: var(--radius-full);
  color: var(--color-mint);
  border: 2px solid var(--color-mint);
}

.trust-card h3 {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 18px;
  color: var(--color-navy);
  margin-bottom: var(--space-md);
}

.trust-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-gray-600);
  margin: 0;
}

.security-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-gray-50);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-200);
}

.security-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-navy);
  border: 1px solid var(--color-gray-200);
}

.security-badge svg {
  color: var(--color-mint);
  flex-shrink: 0;
}

/* ============================================
   FAQ Section
   ============================================ */

.section-faq {
  background: var(--color-gray-50);
}

.faq-grid {
  display: grid;
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--duration-base) var(--easing);
}

.faq-item:hover {
  border-color: var(--color-mint);
  box-shadow: var(--shadow-md);
}

.faq-item[open] {
  border-color: var(--color-mint);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-navy);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question:hover {
  color: var(--color-mint);
}

.faq-icon {
  flex-shrink: 0;
  color: var(--color-gray-400);
  transition: transform var(--duration-base) var(--easing);
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: var(--color-mint);
}

.faq-answer {
  padding: 0 var(--space-xl) var(--space-lg);
  animation: fadeInDown var(--duration-slow) var(--easing);
}

.faq-answer p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-gray-600);
  margin: 0;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  background: linear-gradient(135deg, var(--color-navy), var(--color-mint));
  color: var(--color-white);
}

.cta-card {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.cta-title {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 36px;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

.cta-description {
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: var(--space-2xl);
  opacity: 0.95;
}

.cta-fine-print {
  margin-top: var(--space-lg);
  font-size: 13px;
  opacity: 0.8;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--color-gray-50);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: auto;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-tagline {
  font-size: 13px;
  color: var(--color-gray-600);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-column h4 {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 13px;
  color: var(--color-navy);
  margin-bottom: var(--space-sm);
}

.footer-column a {
  font-size: 13px;
  color: var(--color-gray-600);
}

.footer-column a:hover {
  color: var(--color-navy);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-xl) 0;
  border-top: 1px solid var(--color-gray-200);
  text-align: center;
  font-size: 13px;
  color: var(--color-gray-600);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-title {
    font-size: 36px;
  }
  
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-cta {
    justify-content: center;
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .trust-signals-inline {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
    flex-direction: column;
    text-align: center;
  }
  
  .chrome-badge {
    flex-direction: column;
    text-align: center;
  }
  
  .chrome-badge-rating {
    border-left: none;
    border-top: 1px solid var(--color-gray-200);
    padding-left: 0;
    padding-top: var(--space-lg);
    align-items: center;
  }
  
  .nav-links {
    display: none;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .trust-grid {
    grid-template-columns: 1fr;
  }
  
  .use-cases {
    grid-template-columns: 1fr;
  }
  
  .steps {
    gap: var(--space-xl);
  }
  
  .footer-container {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
}