/* Demo page styles — matching Gradflow brand */
:root {
  --green: #1a3a2a;
  --green-mid: #245538;
  --green-light: #2e6b45;
  --amber: #f5a623;
  --amber-dim: #c4841a;
  --bg: #f8f7f4;
  --bg-warm: #f3f1ec;
  --ink: #1a1a18;
  --ink-mid: #4a4a45;
  --ink-light: #8a8a82;
  --white: #ffffff;
}

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

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Syne', sans-serif;
  line-height: 1.15;
}

/* Nav */
.nav {
  padding: 20px 40px;
  border-bottom: 1px solid rgba(26, 58, 42, 0.08);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 20px;
  color: var(--green);
  letter-spacing: -0.5px;
}
.nav-tagline {
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Demo container */
.demo-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 40px 80px;
}

.demo-header {
  text-align: center;
  margin-bottom: 48px;
}

.demo-badge {
  display: inline-block;
  background: var(--green);
  color: var(--amber);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.demo-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  color: var(--green);
  margin-bottom: 16px;
  letter-spacing: -1.5px;
}

.demo-subtitle {
  font-size: 18px;
  color: var(--ink-mid);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.demo-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}

/* Chat panel */
.chat-panel {
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(26, 58, 42, 0.08);
  overflow: hidden;
}

.chat-header {
  background: var(--green);
  color: var(--white);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-avatar {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-assistant-name {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 15px;
}

.chat-course-name {
  font-size: 13px;
  opacity: 0.7;
}

.chat-messages {
  min-height: 360px;
  max-height: 400px;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.message {
  display: flex;
  gap: 10px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-avatar-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  margin-top: 2px;
}

.message-content {
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 15px;
  line-height: 1.6;
  max-width: 85%;
}

.user-message {
  flex-direction: row-reverse;
}

.user-message .message-content {
  background: var(--green);
  color: var(--white);
  border-bottom-right-radius: 4px;
}

.assistant-message .message-content {
  background: var(--bg-warm);
  color: var(--ink);
  border-bottom-left-radius: 4px;
}

.typing-indicator {
  display: flex;
  gap: 5px;
  padding: 4px 0;
}

.typing-dot {
  width: 7px;
  height: 7px;
  background: var(--ink-light);
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-5px); }
}

/* Source references */
.source-refs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.source-chip {
  font-size: 11px;
  background: rgba(26, 58, 42, 0.08);
  color: var(--green-mid);
  padding: 3px 8px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Suggestions */
.chat-suggestions {
  padding: 0 20px 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.suggestion-chip {
  background: var(--bg-warm);
  border: 1px solid rgba(26, 58, 42, 0.1);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--green-mid);
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'DM Sans', sans-serif;
}

.suggestion-chip:hover {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}

/* Chat input */
.chat-input-area {
  padding: 16px 20px;
  border-top: 1px solid rgba(26, 58, 42, 0.08);
  display: flex;
  gap: 10px;
  align-items: center;
}

.chat-input {
  flex: 1;
  border: 1px solid rgba(26, 58, 42, 0.15);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 15px;
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
}

.chat-input:focus {
  border-color: var(--green-mid);
}

.chat-send-btn {
  width: 42px;
  height: 42px;
  background: var(--green);
  color: var(--white);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  flex-shrink: 0;
}

.chat-send-btn:hover { background: var(--green-mid); }
.chat-send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Info cards */
.demo-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-card {
  background: var(--white);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 12px rgba(26, 58, 42, 0.06);
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: var(--green);
  margin-bottom: 12px;
}

.info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.info-list li {
  font-size: 14px;
  color: var(--ink-mid);
  padding-left: 16px;
  position: relative;
}

.info-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--amber);
  border-radius: 50%;
}

/* CTA card */
.demo-cta {
  background: var(--green);
  color: var(--white);
  text-align: center;
}

.cta-price {
  font-family: 'Syne', sans-serif;
  font-size: 36px;
  font-weight: 800;
  color: var(--amber);
}

.cta-price span {
  font-size: 16px;
  font-weight: 400;
  color: rgba(255,255,255,0.7);
}

.cta-description {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  margin: 8px 0 16px;
}

.cta-btn {
  width: 100%;
  background: var(--amber);
  color: var(--green);
  border: none;
  padding: 12px;
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.cta-btn:hover {
  background: #e8961a;
}

/* CTA form */
.cta-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.cta-input {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(245, 166, 35, 0.4);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: 'DM Sans', sans-serif;
  color: var(--white);
  text-align: center;
}

.cta-input::placeholder {
  color: rgba(255,255,255,0.5);
}

.cta-input:focus {
  outline: none;
  border-color: var(--amber);
}

.cta-success {
  margin-top: 10px;
  font-size: 13px;
  color: var(--amber);
  text-align: center;
}

/* Responsive */
@media (max-width: 800px) {
  .demo-layout {
    grid-template-columns: 1fr;
  }
  .demo-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .demo-cta { grid-column: span 2; }
  .demo-container { padding: 32px 20px 60px; }
}

@media (max-width: 500px) {
  .demo-info { grid-template-columns: 1fr; }
  .demo-cta { grid-column: span 1; }
}