:root {
  --bg-primary: #0a0e27;
  --bg-secondary: #151b3f;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-hover: rgba(255, 255, 255, 0.12);
  --stroke: rgba(255, 255, 255, 0.12);
  --stroke-light: rgba(255, 255, 255, 0.08);
  --text-primary: #e8eefc;
  --text-muted: #b8c2e6;
  --dog-primary: #145DEE;
  --dog-light: rgba(20, 93, 238, 0.1);
  --cat-primary: #0AA66E;
  --cat-light: rgba(10, 166, 110, 0.1);
  --accent: #FFD700;
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.35);
  --radius: 24px;
  --transition: 0.3s cubic-bezier(0.23, 1, 0.320, 1);
}

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

html, body {
  height: 100%;
  font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(1400px 900px at 80% 10%, rgba(27, 31, 82, 0.4) 0%, transparent 60%),
    radial-gradient(1000px 700px at 10% 90%, rgba(10, 97, 67, 0.25) 0%, transparent 55%);
  pointer-events: none;
  z-index: 0;
}

body {
  z-index: 1;
  position: relative;
}

.bg-mesh {
  position: fixed;
  inset: 0;
  pointer-events: none;
  filter: blur(80px) saturate(1.1);
  opacity: 0.25;
  z-index: -1;
}

.site-header {
  max-width: 1200px;
  margin: 50px auto 20px;
  padding: 0 20px;
  text-align: center;
  animation: slideDown 0.6s var(--transition);
}

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

.site-header h1 {
  font-size: clamp(24px, 3vw, 36px);
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
}

.subtitle {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 600;
}

.desc {
  font-size: 14px;
  color: var(--text-muted);
  opacity: 0.8;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 30px 20px 60px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 28px;
  margin-top: 30px;
}

@media (max-width: 900px) {
  .cards {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

.card {
  position: relative;
  isolation: isolate;
  border-radius: var(--radius);
  padding: 32px 28px;
  background: linear-gradient(135deg, var(--glass) 0%, rgba(255, 255, 255, 0.05) 100%);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow-lg);
  min-height: 380px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all var(--transition);
  cursor: pointer;
  outline: none;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.05) 100%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.card:hover, .card:focus {
  transform: translateY(-8px);
  border-color: var(--stroke-light);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
}

.card:hover::before {
  opacity: 1;
}

.dog-card {
  background: linear-gradient(135deg, var(--dog-light) 0%, rgba(255, 255, 255, 0.03) 100%);
  border: 1.5px solid rgba(20, 93, 238, 0.2);
}

.dog-card:hover {
  border-color: var(--dog-primary);
  box-shadow: 0 30px 70px rgba(20, 93, 238, 0.2);
}

.cat-card {
  background: linear-gradient(135deg, var(--cat-light) 0%, rgba(255, 255, 255, 0.03) 100%);
  border: 1.5px solid rgba(10, 166, 110, 0.2);
}

.cat-card:hover {
  border-color: var(--cat-primary);
  box-shadow: 0 30px 70px rgba(10, 166, 110, 0.2);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.icon {
  font-size: 48px;
  line-height: 1;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.badge {
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-dog {
  background: rgba(20, 93, 238, 0.2);
  color: var(--dog-primary);
  border: 1px solid var(--dog-primary);
}

.badge-cat {
  background: rgba(10, 166, 110, 0.2);
  color: var(--cat-primary);
  border: 1px solid var(--cat-primary);
}

.card h2 {
  font-size: 20px;
  line-height: 1.4;
  margin: 0;
  color: var(--text-primary);
}

.card h2 strong {
  font-weight: 800;
}

.card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 8px 0 0;
}

.features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0 0;
  flex-grow: 1;
}

.features li {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.cta {
  align-self: flex-start;
  border: none;
  border-radius: 14px;
  padding: 12px 20px;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow-md);
  margin-top: auto;
}

.cta-dog {
  background: linear-gradient(135deg, var(--dog-primary) 0%, #1a6ef5 100%);
}

.cta-dog:hover {
  transform: translateX(4px);
  box-shadow: 0 12px 30px rgba(20, 93, 238, 0.4);
}

.cta-cat {
  background: linear-gradient(135deg, var(--cat-primary) 0%, #13cc7d 100%);
}

.cta-cat:hover {
  transform: translateX(4px);
  box-shadow: 0 12px 30px rgba(10, 166, 110, 0.4);
}

.assistant {
  margin-top: 40px;
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
  background: linear-gradient(135deg, var(--glass) 0%, rgba(255, 255, 255, 0.05) 100%);
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.5s var(--transition);
}

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

.hidden {
  display: none;
}

.back-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--stroke);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 13px;
  margin-bottom: 16px;
  transition: all var(--transition);
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--text-muted);
}

.assistant-header {
  margin-bottom: 24px;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--stroke);
}

.assistant-header.dog-theme {
  background: linear-gradient(135deg, rgba(20, 93, 238, 0.15) 0%, rgba(20, 93, 238, 0.05) 100%);
  border-color: rgba(20, 93, 238, 0.3);
}

.assistant-header.cat-theme {
  background: linear-gradient(135deg, rgba(10, 166, 110, 0.15) 0%, rgba(10, 166, 110, 0.05) 100%);
  border-color: rgba(10, 166, 110, 0.3);
}

.header-content {
  display: flex;
  align-items: center;
  gap: 14px;
}

.head-icon {
  font-size: 32px;
  line-height: 1;
}

.header-content h3 {
  font-size: 20px;
  margin: 0 0 4px;
  font-weight: 700;
}

.header-content p {
  margin: 0;
}

.chatbox-wrap {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--stroke);
  background: rgba(0, 0, 0, 0.2);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
  margin: 20px 0;
  min-height: 600px;
}

.helper-text {
  margin-top: 16px;
  padding: 14px;
  border-radius: 12px;
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.15);
  color: var(--text-muted);
  font-size: 13px;
}

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

.site-footer {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  font-size: 13px;
  opacity: 0.8;
}

@media (max-width: 640px) {
  .site-header {
    margin-top: 30px;
    margin-bottom: 10px;
  }

  .site-header h1 {
    font-size: 24px;
  }

  .card {
    padding: 24px 20px;
    min-height: 340px;
  }

  .chatbox-wrap {
    min-height: 500px;
  }

  .assistant {
    padding: 20px;
  }
}

@media (prefers-color-scheme: dark) {
  body {
    color-scheme: dark;
  }
}