/* ========================================
   CHATBOT COACH - STYLES CSS
   ======================================== */

/* Reset & Variables */
:root {
  --primary: #667eea;
  --primary-dark: #5568d3;
  --secondary: #764ba2;
  --success: #48bb78;
  --warning: #f6ad55;
  --danger: #f56565;
  --dark: #1a202c;
  --gray-50: #f7fafc;
  --gray-100: #edf2f7;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e0;
  --gray-600: #718096;
  --gray-700: #4a5568;
  --gray-900: #1a202c;
  --white: #ffffff;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  --radius: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 
               'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

p {
  margin-bottom: 1rem;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

/* Buttons */
.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1.1rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  color: var(--white);
}

.btn-large {
  padding: 18px 48px;
  font-size: 1.2rem;
}

.btn-block {
  display: block;
  width: 100%;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
}

.logo-icon {
  font-size: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  color: var(--gray-700);
  font-weight: 500;
  transition: var(--transition);
}

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

.btn-nav-cta {
  padding: 10px 24px;
  background: var(--primary);
  color: var(--white) !important;
  border-radius: var(--radius);
  font-weight: 600;
}

.btn-nav-cta:hover {
  background: var(--primary-dark);
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav-links {
    gap: 1rem;
    font-size: 0.9rem;
  }
  
  .nav-links a:not(.btn-nav-cta) {
    display: none;
  }
}

/* Hero Section */
.hero {
  padding: 80px 0 100px;
  background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-title {
  margin-bottom: 1.5rem;
}

.highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray-700);
  margin-bottom: 2rem;
}

.hero-features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.1rem;
}

.checkmark {
  color: var(--success);
  font-size: 1.5rem;
  font-weight: bold;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cta-note {
  font-size: 0.9rem;
  color: var(--gray-600);
  margin: 0;
}

/* Hero Mockup */
.mockup-placeholder {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}

.mockup-header {
  background: var(--gray-100);
  padding: 12px;
  border-bottom: 1px solid var(--gray-200);
}

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

.mockup-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gray-300);
}

.mockup-content {
  padding: 30px 20px;
  min-height: 400px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-bubble {
  padding: 16px 20px;
  border-radius: 16px;
  max-width: 80%;
  line-height: 1.5;
  animation: fadeInUp 0.5s ease;
}

.chat-bubble.bot {
  background: var(--gray-100);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.chat-bubble.user {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.mock-btn {
  display: inline-block;
  margin-top: 8px;
  margin-right: 8px;
  padding: 8px 16px;
  background: var(--white);
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: var(--radius);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 968px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-image {
    order: -1;
  }
}

/* Problem/Solution Section */
.problem-solution {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.problem-card {
  text-align: center;
  padding: 2rem;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.problem-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.problem-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.problem-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--danger);
}

.solution-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  padding: 3rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.solution-box h2 {
  margin-bottom: 1rem;
}

.solution-subtitle {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.solution-features {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.solution-feature {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.feature-number {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 700;
}

.solution-feature h4 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.solution-feature p {
  margin: 0;
  opacity: 0.9;
}

/* Features Section */
.features {
  padding: 80px 0;
  background: var(--gray-50);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.feature-card p {
  margin: 0;
  color: var(--gray-600);
}

/* Magic Trick Demo Section */
.magic-trick {
  padding: 80px 0;
  background: var(--white);
}

.magic-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--warning);
  color: var(--white);
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.magic-description {
  font-size: 1.1rem;
  color: var(--gray-700);
  margin-bottom: 2rem;
}

.magic-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.magic-steps li {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.05rem;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  border-radius: 50%;
  font-weight: 700;
}

.magic-note {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--warning);
  color: var(--white);
  border-radius: var(--radius);
}

.note-icon {
  font-size: 1.5rem;
}

.demo-card {
  background: var(--white);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 2px solid var(--gray-200);
}

.demo-card h3 {
  margin-bottom: 0.5rem;
}

.demo-card > p {
  color: var(--gray-600);
  margin-bottom: 2rem;
}

.demo-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 600;
  color: var(--gray-700);
}

.form-group input {
  padding: 14px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-note {
  font-size: 0.85rem;
  color: var(--gray-600);
  text-align: center;
  margin: 0;
}

.demo-success {
  text-align: center;
  padding: 2rem 0;
}

.success-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.demo-success h4 {
  margin-bottom: 0.5rem;
}

.loading-bar {
  width: 100%;
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 2rem;
}

.loading-progress {
  height: 100%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  width: 0%;
  animation: loading 30s ease-out forwards;
}

@keyframes loading {
  to { width: 100%; }
}

@media (max-width: 968px) {
  .magic-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* Pricing Section */
.pricing {
  padding: 80px 0;
  background: var(--gray-50);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.pricing-card {
  background: var(--white);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 2px solid var(--gray-200);
  transition: var(--transition);
  position: relative;
}

.pricing-card.popular {
  border-color: var(--primary);
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.popular-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.pricing-header {
  text-align: center;
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--gray-100);
  margin-bottom: 2rem;
}

.pricing-header h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.price {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.price-amount {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
}

.price-period {
  color: var(--gray-600);
  font-size: 1rem;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.pricing-note {
  text-align: center;
  font-size: 0.9rem;
  color: var(--gray-600);
  margin: 0;
}

.pricing-faq {
  max-width: 900px;
  margin: 0 auto;
  padding-top: 3rem;
}

.pricing-faq h3 {
  text-align: center;
  margin-bottom: 2rem;
}

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

.faq-item {
  background: var(--white);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.faq-item h4 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--primary);
}

.faq-item p {
  margin: 0;
  color: var(--gray-700);
  font-size: 0.95rem;
}

/* Testimonials */
.testimonials {
  padding: 80px 0;
  background: var(--white);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: var(--gray-50);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.testimonial-stars {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.testimonial-text {
  font-size: 1.05rem;
  font-style: italic;
  color: var(--gray-700);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.author-name {
  font-weight: 600;
  color: var(--gray-900);
}

.author-title {
  font-size: 0.9rem;
  color: var(--gray-600);
}

/* Final CTA */
.final-cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  text-align: center;
}

.final-cta h2 {
  margin-bottom: 1rem;
}

.final-cta p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

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

.final-cta .btn-primary:hover {
  background: var(--gray-100);
}

.final-cta .cta-note {
  color: var(--white);
  opacity: 0.9;
}

/* Footer */
.footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-col p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--white);
  transition: var(--transition);
}

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

.footer-col h4 {
  color: var(--white);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col ul a {
  color: var(--gray-300);
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 968px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Responsive Global Adjustments */
@media (max-width: 640px) {
  .hero, .features, .pricing, .testimonials, 
  .magic-trick, .problem-solution, .final-cta {
    padding: 50px 0;
  }
  
  .section-header {
    margin-bottom: 2rem;
  }
}