/* ============================================================================
   Ask Alex AI — Landing Page Styles
   ============================================================================ */

/* Reset & Vars */
:root {
  --primary: #1a1a1a;
  --secondary: #0066cc;
  --accent: #ff6b35;
  --success: #2ecc71;
  --warning: #f39c12;
  --danger: #e74c3c;
  --light: #f5f5f5;
  --dark: #222222;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --border: #e0e0e0;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
  --radius: 8px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background-color: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
}

body.dark-mode {
  background-color: var(--primary);
  color: #e0e0e0;
}

body.dark-mode .card {
  background-color: var(--dark);
  border-color: #444;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: 1.375rem;
}

h4 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 1em;
}

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

a:hover {
  text-decoration: underline;
  opacity: 0.8;
}

code {
  background-color: var(--light);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
}

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

.section {
  padding: 60px 0;
}

.section.dark {
  background-color: var(--primary);
  color: #e0e0e0;
}

body.dark-mode .section.dark {
  background-color: #0a0a0a;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  text-align: center;
  min-height: 44px;
  min-width: 44px;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: #0052a3;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background-color: #e55a2b;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  border: 2px solid var(--secondary);
  color: var(--secondary);
  background-color: transparent;
}

.btn-outline:hover {
  background-color: var(--secondary);
  color: white;
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.btn-block {
  width: 100%;
}

/* Cards */
.card {
  background-color: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.card-header {
  margin-bottom: 16px;
}

.card-body {
  margin-bottom: 16px;
}

.card-footer {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 16px;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: var(--transition);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

/* Navigation */
nav {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

body.dark-mode nav {
  background-color: var(--dark);
  border-bottom-color: #444;
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

body.dark-mode .logo {
  color: #e0e0e0;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
  align-items: center;
}

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

body.dark-mode .nav-links a {
  color: #e0e0e0;
}

.nav-links a:hover {
  color: var(--secondary);
  text-decoration: none;
}

.nav-cta {
  display: flex;
  gap: 10px;
  align-items: center;
}

.dark-mode-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  padding: 0;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  nav .container {
    flex-direction: row;
  }

  .mobile-menu-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
  }
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  color: white;
  padding: 100px 0;
  text-align: center;
}

body.dark-mode .hero {
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
}

.hero-content h1 {
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease-out;
}

.hero-content p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 40px;
  color: #ccc;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.feature-card {
  text-align: center;
  padding: 32px 24px;
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Proof Section */
.proof-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin: 60px 0;
  text-align: center;
}

.proof-item h3 {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.proof-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Pricing Table */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin: 40px 0;
}

.pricing-card {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  border-color: var(--accent);
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured::before {
  content: "MOST POPULAR";
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent);
  color: white;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin: 20px 0;
}

.pricing-price small {
  font-size: 0.6em;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin: 30px 0;
  text-align: left;
}

.pricing-features li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li::before {
  content: "✓";
  color: var(--success);
  font-weight: 700;
  margin-right: 12px;
}

/* Testimonials */
.testimonial {
  background-color: var(--light);
  padding: 32px;
  border-radius: var(--radius);
  margin: 24px 0;
  border-left: 4px solid var(--secondary);
}

body.dark-mode .testimonial {
  background-color: var(--dark);
  border-bottom: 1px solid #444;
}

.testimonial-text {
  font-style: italic;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.testimonial-author {
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial-role {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Footer */
footer {
  background-color: var(--primary);
  color: #e0e0e0;
  padding: 60px 0 20px;
  border-top: 1px solid #444;
  margin-top: 100px;
}

body.dark-mode footer {
  background-color: #0a0a0a;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h4 {
  color: white;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  color: #bbb;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--secondary);
  text-decoration: none;
}

.social-icons {
  display: flex;
  gap: 16px;
  margin-top: 20px;
}

.social-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: #333;
  border-radius: 50%;
  color: white;
  transition: var(--transition);
}

.social-icons a:hover {
  background-color: var(--secondary);
  transform: translateY(-4px);
}

.footer-bottom {
  border-top: 1px solid #444;
  padding-top: 20px;
  text-align: center;
  color: #999;
  font-size: 0.9rem;
}

/* Utilities */
.text-center {
  text-align: center;
}

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

.mt-40 {
  margin-top: 40px;
}

.mb-40 {
  margin-bottom: 40px;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}

.text-xl {
  font-size: 1.25rem;
}

.text-lg {
  font-size: 1.125rem;
}

.text-sm {
  font-size: 0.875rem;
}

.text-xs {
  font-size: 0.75rem;
}

.gap-20 {
  gap: 20px;
}

.gap-40 {
  gap: 40px;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Responsive */
@media (max-width: 768px) {
  .section {
    padding: 40px 0;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .proof-section {
    gap: 20px;
    margin: 40px 0;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .nav-links {
    gap: 15px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .section {
    padding: 30px 0;
  }

  .card {
    padding: 16px;
  }

  .pricing-price {
    font-size: 2rem;
  }

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

  .proof-item h3 {
    font-size: 2rem;
  }
}

/* Dark mode transitions */
* {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}