/* Renaissance Project - Main Styles */
:root {
  --slate-100: #f1f5f9;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --cyan-600: #0891b2;
  --amber-400: #fbbf24;
  --amber-500: #f59e0b;
  --purple-400: #c084fc;
  --purple-500: #a855f7;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --red-400: #f87171;
  --red-500: #ef4444;
  --red-600: #dc2626;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--slate-900);
  color: var(--slate-100);
  line-height: 1.6;
}

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

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--slate-800);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: opacity 0.2s;
}

.nav-logo:hover {
  opacity: 0.8;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  border: 2px solid var(--slate-600);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.nav-logo-icon span {
  color: var(--slate-400);
  font-weight: 300;
  font-size: 1.1rem;
}

.nav-logo-i {
  position: absolute;
  right: -4px;
  top: -4px;
  font-size: 0.7rem;
  font-weight: bold;
  color: var(--slate-600);
}

.nav-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--slate-400);
  transition: color 0.2s;
  cursor: pointer;
}

.nav-link:hover {
  color: var(--cyan-400);
}

.nav-link.active {
  color: var(--cyan-400);
}

.nav-link.litchi:hover, .nav-link.litchi.active {
  color: var(--amber-400);
}

.nav-btn {
  padding: 0.5rem 1rem;
  background: var(--cyan-600);
  border-radius: 8px;
  font-weight: 500;
  transition: background 0.2s;
}

.nav-btn:hover {
  background: var(--cyan-500);
}

/* Language Selector */
.lang-selector {
  display: flex;
  gap: 4px;
  background: var(--slate-800);
  padding: 4px;
  border-radius: 8px;
}

.lang-btn {
  padding: 4px 8px;
  border: none;
  background: transparent;
  color: var(--slate-400);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn:hover {
  color: white;
}

.lang-btn.active {
  background: var(--cyan-600);
  color: white;
}

/* Main Content */
main {
  padding-top: 80px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Hero Section */
.hero {
  padding: 5rem 0;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--slate-800);
  border-radius: 9999px;
  font-size: 0.875rem;
  color: var(--slate-400);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.hero-title span {
  color: var(--cyan-400);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--slate-400);
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 1rem 2rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: var(--cyan-600);
  color: white;
}

.btn-primary:hover {
  background: var(--cyan-500);
}

.btn-secondary {
  background: var(--slate-800);
  color: white;
}

.btn-secondary:hover {
  background: var(--slate-700);
}

.btn-disabled {
  background: var(--slate-700);
  color: var(--slate-400);
  cursor: not-allowed;
}

/* Cards Grid */
.cards-section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--slate-400);
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--slate-700);
  border-radius: 16px;
  padding: 2rem;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: rgba(6, 182, 212, 0.5);
}

.card.litchi:hover {
  border-color: rgba(245, 158, 11, 0.5);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: rgba(6, 182, 212, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.card.litchi .card-icon {
  background: rgba(245, 158, 11, 0.2);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.card-tagline {
  color: var(--cyan-400);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.card.litchi .card-tagline {
  color: var(--amber-400);
}

.card-description {
  color: var(--slate-400);
  margin-bottom: 1.5rem;
}

.card-features {
  list-style: none;
  margin-bottom: 1.5rem;
}

.card-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--slate-400);
  margin-bottom: 0.5rem;
}

.card-features li span {
  color: var(--cyan-400);
}

.card.litchi .card-features li span {
  color: var(--amber-400);
}

.card-link {
  color: var(--cyan-400);
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s;
}

.card-link:hover {
  color: var(--cyan-500);
}

.card.litchi .card-link {
  color: var(--amber-400);
}

.card.litchi .card-link:hover {
  color: var(--amber-500);
}

/* Why Section */
.why-section {
  background: rgba(30, 41, 59, 0.3);
  padding: 5rem 0;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  text-align: center;
}

.why-item h3 {
  font-weight: 600;
  margin: 1rem 0 0.5rem;
}

.why-item p {
  color: var(--slate-400);
  font-size: 0.875rem;
}

.why-icon {
  font-size: 2.5rem;
}

/* Features Grid (Litchi) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: 12px;
  padding: 1.5rem;
}

.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.feature-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-desc {
  color: var(--slate-400);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.feature-tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  background: var(--slate-700);
  border-radius: 4px;
  color: var(--slate-400);
}

/* Page Header */
.page-header {
  padding: 4rem 0;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

@media (min-width: 768px) {
  .page-header {
    flex-direction: row;
    align-items: center;
  }
}

.page-header-content {
  flex: 1;
}

.page-header-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.page-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(6, 182, 212, 0.2);
  color: var(--cyan-400);
  border-radius: 9999px;
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.page-badge.amber {
  background: rgba(245, 158, 11, 0.2);
  color: var(--amber-400);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.page-title span {
  color: var(--amber-400);
}

.page-subtitle {
  font-size: 1.25rem;
  color: var(--slate-400);
  margin-bottom: 2rem;
}

/* Architecture Diagram */
.architecture-box {
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: 16px;
  padding: 1.5rem;
}

.arch-label {
  font-size: 0.875rem;
  color: var(--slate-500);
  margin-bottom: 1rem;
}

.arch-block {
  background: var(--slate-700);
  border-radius: 8px;
  padding: 0.75rem;
  text-align: center;
  font-size: 0.875rem;
}

.arch-arrow {
  text-align: center;
  color: var(--slate-600);
  padding: 0.5rem 0;
}

.arch-urs {
  background: linear-gradient(90deg, var(--cyan-600), var(--cyan-500));
  border-radius: 8px;
  padding: 1rem;
}

.arch-urs-title {
  text-align: center;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.arch-urs-components {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.arch-component {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  padding: 0.5rem;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Components Section */
.components-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.component-card {
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: 12px;
  padding: 1.5rem;
}

.component-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: 1rem;
}

.component-icon.cyan {
  background: rgba(6, 182, 212, 0.2);
  color: var(--cyan-400);
}

.component-icon.purple {
  background: rgba(168, 85, 247, 0.2);
  color: var(--purple-400);
}

.component-icon.amber {
  background: rgba(245, 158, 11, 0.2);
  color: var(--amber-400);
}

.component-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.component-subtitle {
  color: var(--slate-400);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.component-features {
  list-style: none;
}

.component-features li {
  color: var(--slate-500);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

/* Markets */
.markets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.market-card {
  background: rgba(30, 41, 59, 0.5);
  border-radius: 12px;
  padding: 1.5rem;
}

.market-card.cyan {
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.market-card.purple {
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.market-card.amber {
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.market-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.market-title {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.market-desc {
  color: var(--slate-400);
  font-size: 0.875rem;
}

/* Phone Mockup */
.phone-mockup {
  width: 256px;
  height: 500px;
  background: var(--slate-800);
  border-radius: 48px;
  border: 4px solid var(--slate-700);
  padding: 12px;
  position: relative;
}

.phone-notch {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 24px;
  background: var(--slate-700);
  border-radius: 9999px;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--slate-900);
  border-radius: 40px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.phone-header {
  background: rgba(245, 158, 11, 0.2);
  padding: 1rem;
  text-align: center;
}

.phone-header-icon {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.phone-header-title {
  color: var(--amber-400);
  font-weight: 600;
}

.phone-messages {
  flex: 1;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.875rem;
}

.phone-msg {
  max-width: 85%;
  padding: 0.75rem;
  border-radius: 16px;
}

.phone-msg.user {
  background: rgba(245, 158, 11, 0.2);
  margin-left: auto;
  border-top-right-radius: 4px;
  text-align: right;
}

.phone-msg.assistant {
  background: var(--slate-800);
  border-top-left-radius: 4px;
}

/* Platforms Section */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.platform-icon {
  width: 80px;
  height: 80px;
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1rem;
}

.platform-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.platform-desc {
  color: var(--slate-400);
  font-size: 0.875rem;
}

/* Benefits Grid */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  text-align: center;
}

.benefit-icon {
  width: 64px;
  height: 64px;
  background: rgba(245, 158, 11, 0.2);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 1rem;
}

.benefit-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.benefit-desc {
  color: var(--slate-400);
  font-size: 0.875rem;
}

/* Coming Soon Box */
.coming-soon-box {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--slate-700);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
}

.coming-soon-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.coming-soon-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.coming-soon-tag {
  padding: 0.5rem 1rem;
  background: rgba(51, 65, 85, 0.5);
  border-radius: 8px;
  color: var(--slate-500);
}

/* Demo Page */
.demo-header {
  text-align: center;
  margin-bottom: 2rem;
}

.demo-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.demo-subtitle {
  color: var(--slate-400);
}

.demo-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 1024px) {
  .demo-grid {
    grid-template-columns: 2fr 1fr;
  }
}

.demo-chat {
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  height: 600px;
}

.demo-chat-header {
  padding: 1rem;
  border-bottom: 1px solid var(--slate-700);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.demo-chat-title {
  font-weight: 600;
}

.demo-mode-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.demo-mode-badge.neutral { background: var(--slate-600); }
.demo-mode-badge.friendly { background: var(--green-600); }
.demo-mode-badge.empathetic { background: var(--amber-500); }
.demo-mode-badge.de-escalation { background: var(--red-600); }

.demo-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.demo-msg {
  max-width: 80%;
  padding: 0.75rem 1rem;
  border-radius: 16px;
}

.demo-msg.user {
  background: var(--cyan-600);
  margin-left: auto;
  border-top-right-radius: 4px;
}

.demo-msg.assistant {
  background: var(--slate-700);
  border-top-left-radius: 4px;
}

.demo-typing {
  display: flex;
  gap: 4px;
  padding: 0.75rem 1rem;
  background: var(--slate-700);
  border-radius: 16px;
  border-top-left-radius: 4px;
  width: fit-content;
}

.demo-typing span {
  width: 8px;
  height: 8px;
  background: var(--slate-500);
  border-radius: 50%;
  animation: bounce 1s infinite;
}

.demo-typing span:nth-child(2) { animation-delay: 0.1s; }
.demo-typing span:nth-child(3) { animation-delay: 0.2s; }

@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-6px); }
}

.demo-input-area {
  padding: 1rem;
  border-top: 1px solid var(--slate-700);
}

.demo-test-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.demo-test-btn {
  padding: 0.25rem 0.75rem;
  background: var(--slate-700);
  border: none;
  border-radius: 9999px;
  color: var(--slate-300);
  font-size: 0.75rem;
  cursor: pointer;
  transition: background 0.2s;
}

.demo-test-btn:hover {
  background: var(--slate-600);
}

.demo-input-form {
  display: flex;
  gap: 0.5rem;
}

.demo-input {
  flex: 1;
  background: var(--slate-900);
  border: 1px solid var(--slate-700);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: white;
  font-size: 1rem;
}

.demo-input:focus {
  outline: none;
  border-color: var(--cyan-500);
}

.demo-send-btn {
  padding: 0.75rem 1.5rem;
  background: var(--cyan-600);
  border: none;
  border-radius: 8px;
  color: white;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.demo-send-btn:hover {
  background: var(--cyan-500);
}

/* Demo State Panel */
.demo-state {
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: 16px;
  padding: 1.5rem;
  height: fit-content;
}

.demo-state-title {
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.demo-meters {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.demo-meter {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.demo-meter-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.demo-meter-label {
  color: var(--slate-400);
}

.demo-meter-bar {
  height: 8px;
  background: var(--slate-700);
  border-radius: 9999px;
  overflow: hidden;
}

.demo-meter-fill {
  height: 100%;
  transition: width 0.5s, background 0.5s;
  border-radius: 9999px;
}

.demo-meter-fill.frustration { background: var(--red-500); }
.demo-meter-fill.frustration.low { background: var(--green-500); }
.demo-meter-fill.frustration.medium { background: var(--amber-500); }
.demo-meter-fill.trust { background: var(--cyan-500); }
.demo-meter-fill.engagement { background: var(--purple-500); }
.demo-meter-fill.escalation { background: var(--slate-500); }
.demo-meter-fill.escalation.high { background: var(--red-500); }

.demo-mode-box {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--slate-900);
  border-radius: 12px;
}

.demo-mode-label {
  font-size: 0.75rem;
  color: var(--slate-500);
  margin-bottom: 0.5rem;
}

.demo-mode-value {
  font-size: 1.1rem;
  font-weight: 700;
}

.demo-mode-value.neutral { color: var(--slate-300); }
.demo-mode-value.friendly { color: var(--green-400); }
.demo-mode-value.empathetic { color: var(--amber-400); }
.demo-mode-value.de-escalation { color: var(--red-400); }

.demo-constraints-box {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--slate-900);
  border-radius: 12px;
}

.demo-constraints-label {
  font-size: 0.75rem;
  color: var(--slate-500);
  margin-bottom: 0.5rem;
}

.demo-constraint {
  font-size: 0.875rem;
  color: var(--slate-400);
  margin-bottom: 0.25rem;
}

.demo-constraint span {
  color: white;
}

/* Footer */
.footer {
  border-top: 1px solid var(--slate-800);
  margin-top: 5rem;
  padding: 3rem 0;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-logo-icon {
  width: 32px;
  height: 32px;
  border: 2px solid var(--slate-700);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-logo-icon span {
  color: var(--slate-500);
  font-weight: 300;
  font-size: 0.875rem;
}

.footer-company {
  color: var(--slate-500);
}

.footer-copyright {
  color: var(--slate-600);
  font-size: 0.875rem;
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--slate-400);
  margin: 5px 0;
  transition: all 0.3s;
}

.mobile-nav {
  display: none;
  padding: 1rem 0;
}

.mobile-nav a {
  display: block;
  padding: 0.75rem 0;
  color: var(--slate-400);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .mobile-nav.open {
    display: block;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .page-title {
    font-size: 2rem;
  }
}