/* Centauri Landing Page - Clean Modern Design */
/* Inspired by Google's clean, white, professional aesthetic */

:root {
  --color-primary: #4285f4;
  --color-primary-dark: #1a73e8;
  --color-primary-light: #8ab4f8;
  
  --color-text: #202124;
  --color-text-secondary: #5f6368;
  --color-text-light: #80868b;
  
  --color-bg: #ffffff;
  --color-bg-subtle: #f8f9fa;
  --color-border: #dadce0;
  
  --color-success: #34a853;
  --color-warning: #fbbc04;
  --color-accent: #ea4335;
  
  --shadow-sm: 0 1px 2px 0 rgba(60,64,67,0.1), 0 1px 3px 1px rgba(60,64,67,0.08);
  --shadow-md: 0 1px 3px 0 rgba(60,64,67,0.15), 0 4px 8px 3px rgba(60,64,67,0.1);
  --shadow-lg: 0 8px 10px -6px rgba(60,64,67,0.1), 0 20px 25px -5px rgba(60,64,67,0.1);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --font-sans: 'Google Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==================== */
/* HEADER NAVIGATION    */
/* ==================== */
.landing-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  padding: 0 24px;
}

.landing-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.header-logo-icon {
  width: 44px;
  height: 44px;
  position: relative;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header-logo:hover .header-logo-icon {
  transform: scale(1.05);
}

.header-logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  animation: logoSubtleGlow 4s ease-in-out infinite;
}

@keyframes logoSubtleGlow {
  0%, 100% {
    filter: drop-shadow(0 0 0px rgba(99, 102, 241, 0));
  }
  50% {
    filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.3));
  }
}

.header-logo-text {
  font-size: 22px;
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: -0.5px;
  transition: color 0.3s ease;
}

.header-logo:hover .header-logo-text {
  color: var(--color-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-text {
  background: transparent;
  color: var(--color-primary);
  padding: 10px 16px;
}

.btn-text:hover {
  background: rgba(66, 133, 244, 0.08);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

.btn-outline {
  background: white;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  background: var(--color-bg-subtle);
  border-color: var(--color-primary-light);
}

.btn-large {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

/* ========================= */
/* LAUNCH COUNTDOWN SECTION  */
/* ========================= */
.launch-countdown {
  padding: 24px 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  margin-top: 64px;
  position: relative;
  overflow: hidden;
}

.launch-countdown::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.launch-countdown .container {
  position: relative;
  z-index: 1;
}

.countdown-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.countdown-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: #a5b4fc;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.countdown-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
}

.countdown-subtitle {
  font-size: 1rem;
  color: #94a3b8;
  margin: 0;
  max-width: 500px;
}

.countdown-timer {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 8px 0;
}

.countdown-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 70px;
}

.countdown-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, #fff 0%, #c7d2fe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.countdown-label {
  font-size: 11px;
  font-weight: 600;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

.countdown-separator {
  font-size: 2rem;
  font-weight: 700;
  color: #475569;
  margin-bottom: 20px;
}

.countdown-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

.btn-glow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: white;
  font-weight: 600;
  font-size: 15px;
  border-radius: 12px;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
  transition: all 0.3s ease;
}

.btn-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.btn-glow svg {
  flex-shrink: 0;
}

.countdown-hint {
  font-size: 12px;
  color: #64748b;
}

@media (max-width: 640px) {
  .countdown-timer {
    gap: 8px;
  }
  
  .countdown-item {
    min-width: 55px;
  }
  
  .countdown-value {
    font-size: 1.75rem;
  }
  
  .countdown-separator {
    font-size: 1.5rem;
    margin-bottom: 15px;
  }
  
  .countdown-title {
    font-size: 1.4rem;
  }
  
  .btn-glow {
    padding: 12px 24px;
    font-size: 14px;
  }
}

/* ==================== */
/* HERO SECTION         */
/* ==================== */
.hero {
  padding: 140px 0 80px;
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-content {
  max-width: 540px;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.hero-tagline svg {
  width: 20px;
  height: 20px;
}

.hero h1 {
  font-size: 56px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -1px;
  color: var(--color-text);
  margin-bottom: 24px;
}

.hero h1 strong {
  font-weight: 500;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
}

.hero-image-container {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image-container img {
  width: 100%;
  height: auto;
  display: block;
}

/* Floating cards around hero image */
.floating-card {
  position: absolute;
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 16px;
  animation: float 6s ease-in-out infinite;
}

.floating-card-1 {
  top: 10%;
  right: -40px;
  animation-delay: 0s;
}

.floating-card-2 {
  bottom: 20%;
  left: -60px;
  animation-delay: 2s;
}

.floating-card-3 {
  top: 60%;
  right: -30px;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* ==================== */
/* FEATURE TABS BAR     */
/* ==================== */
.feature-tabs-section {
  padding: 20px 0;
  background: var(--color-bg);
  position: sticky;
  top: 64px; /* Below header */
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
}

.feature-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  background: var(--color-bg-subtle);
  border-radius: var(--radius-full);
  padding: 8px;
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
}

.feature-tab {
  padding: 14px 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  text-decoration: none;
}

.feature-tab:hover {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.04);
}

.feature-tab.active {
  color: var(--color-text);
  background: white;
  box-shadow: var(--shadow-sm);
}

/* ==================== */
/* FEATURE CONTENT      */
/* ==================== */
.feature-content-section {
  padding: 0;
  background: var(--color-bg);
}

/* Feature sections - all visible for scroll navigation */
.feature-section {
  padding: 140px 0;
  scroll-margin-top: 160px; /* Account for sticky header + tabs bar */
  border-bottom: none;
}

.feature-section:nth-child(even) {
  background: var(--color-bg-subtle);
}

.feature-section:last-child {
  border-bottom: none;
}

/* Remove old tab-based hiding */
.feature-content {
  display: block;
}

.feature-content.active {
  display: block;
}

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

.feature-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: center;
}

.feature-layout.reverse {
  direction: rtl;
}

.feature-layout.reverse > * {
  direction: ltr;
}

.feature-text h2 {
  font-size: 40px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: 20px;
}

.feature-text p {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  font-size: 16px;
  color: var(--color-text-secondary);
}

.feature-list li svg {
  width: 24px;
  height: 24px;
  color: var(--color-success);
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ==================== */
/* STATS SECTION        */
/* ==================== */
.stats-section {
  padding: 100px 0;
  background: var(--color-bg);
}

.stats-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.stats-header h2 {
  font-size: 40px;
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 16px;
}

.stats-header p {
  font-size: 18px;
  color: var(--color-text-secondary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.stat-item {
  text-align: center;
  padding: 32px;
}

.stat-number {
  font-size: 56px;
  font-weight: 500;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 16px;
  color: var(--color-text-secondary);
}

/* ==================== */
/* COMPARISON SECTION   */
/* ==================== */
.comparison-section {
  padding: 100px 0;
  background: var(--color-bg-subtle);
}

.comparison-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.comparison-header h2 {
  font-size: 40px;
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 16px;
}

.comparison-header p {
  font-size: 18px;
  color: var(--color-text-secondary);
}

.comparison-table {
  max-width: 900px;
  margin: 0 auto;
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.comparison-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  border-bottom: 1px solid var(--color-border);
}

.comparison-row:last-child {
  border-bottom: none;
}

.comparison-row.header {
  background: var(--color-bg-subtle);
  font-weight: 500;
}

.comparison-cell {
  padding: 20px 24px;
  font-size: 14px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.comparison-cell:first-child {
  justify-content: flex-start;
  color: var(--color-text);
}

.comparison-cell.highlight {
  background: rgba(66, 133, 244, 0.05);
  color: var(--color-primary);
  font-weight: 500;
}

.check-icon {
  width: 24px;
  height: 24px;
  color: var(--color-success);
}

.x-icon {
  width: 24px;
  height: 24px;
  color: var(--color-text-light);
}

/* ==================== */
/* TESTIMONIALS         */
/* ==================== */
.testimonials-section {
  padding: 100px 0;
  background: var(--color-bg);
}

.testimonials-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.testimonials-header h2 {
  font-size: 40px;
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 16px;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.testimonial-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.testimonial-quote {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 18px;
}

.testimonial-info h4 {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 2px;
}

.testimonial-info p {
  font-size: 13px;
  color: var(--color-text-light);
}

/* ==================== */
/* CTA SECTION          */
/* ==================== */
.cta-section {
  padding: 120px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a73e8 100%);
  text-align: center;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 48px;
  font-weight: 400;
  color: white;
  margin-bottom: 20px;
}

.cta-content p {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 40px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-white {
  background: white;
  color: var(--color-primary);
}

.btn-white:hover {
  background: var(--color-bg-subtle);
  box-shadow: var(--shadow-md);
}

.btn-outline-white {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
}

/* ==================== */
/* FOOTER               */
/* ==================== */
.landing-footer {
  padding: 60px 0 40px;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-top: 16px;
  max-width: 280px;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 20px;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 12px;
}

.footer-column a {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-size: 13px;
  color: var(--color-text-light);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  color: var(--color-text-light);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-text-secondary);
}

/* Social Media Links */
.footer-social {
  text-align: center;
  margin-bottom: 32px;
}

.footer-social h4 {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 16px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-bg-secondary, #f3f4f6);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
}

.social-links a:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

.social-links svg {
  flex-shrink: 0;
}

/* ==================== */
/* RESPONSIVE           */
/* ==================== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 60px;
  }
  
  .hero-content {
    max-width: 100%;
    text-align: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .feature-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .feature-layout.reverse {
    direction: ltr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .landing-header .container {
    height: 56px;
  }
  
  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .feature-tabs {
    flex-wrap: wrap;
    border-radius: var(--radius-lg);
  }
  
  .feature-tab {
    padding: 12px 20px;
    font-size: 13px;
  }
  
  .comparison-row {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
  
  .comparison-cell {
    padding: 16px 12px;
    font-size: 12px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .stat-number {
    font-size: 40px;
  }
  
  .cta-content h2 {
    font-size: 32px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .header-logo-text {
    display: none;
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .cta-buttons .btn {
    width: 100%;
  }
}