/* =========================================================
   Nous Agent — main.css
   Brand tokens + Bootstrap 5 overrides
   ========================================================= */

/* ----- CSS Custom Properties (brand tokens) ----- */
:root {
  --na-primary:     #4F46E5; /* indigo */
  --na-primary-dk:  #3730A3; /* darker indigo for hover */
  --na-accent:      #7C3AED; /* violet */
  --na-accent-lt:   #EDE9FE; /* light violet tint */
  --na-text:        #111827; /* near-black */
  --na-text-muted:  #6B7280; /* gray-500 */
  --na-bg:          #FFFFFF;
  --na-bg-alt:      #F9FAFB; /* subtle off-white for alternating sections */
  --na-border:      #E5E7EB;
  --na-radius:      0.75rem;
  --na-radius-lg:   1.25rem;
  --na-shadow:      0 4px 24px rgba(79, 70, 229, 0.08);
  --na-shadow-lg:   0 8px 40px rgba(79, 70, 229, 0.14);
}

/* ----- Base ----- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--na-text);
  background: var(--na-bg);
  -webkit-font-smoothing: antialiased;
}

/* ----- Bootstrap overrides ----- */
.btn-primary {
  background-color: var(--na-primary);
  border-color: var(--na-primary);
}
.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--na-primary-dk);
  border-color: var(--na-primary-dk);
}
.btn-outline-primary {
  color: var(--na-primary);
  border-color: var(--na-primary);
}
.btn-outline-primary:hover {
  background-color: var(--na-primary);
  border-color: var(--na-primary);
}

/* ----- Navbar ----- */
.navbar {
  border-bottom: 1px solid var(--na-border);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--na-primary) !important;
  letter-spacing: -0.02em;
}

.nav-link {
  color: var(--na-text-muted) !important;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-link:hover {
  color: var(--na-primary) !important;
}

/* Login link */
.nav-login-link {
  color: var(--na-text-muted);
  font-weight: 500;
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.15s;
}
.nav-login-link:hover {
  color: var(--na-primary);
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
}
.lang-btn {
  background: none;
  border: none;
  padding: 4px 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--na-text-muted);
  border-radius: 4px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: color 0.15s, background 0.15s;
}
.lang-btn:hover {
  color: var(--na-primary);
}
.lang-btn.active {
  color: var(--na-primary);
  background: var(--na-accent-lt);
}
.lang-separator {
  color: var(--na-border);
  font-size: 0.8rem;
  user-select: none;
}

/* ----- Section layout helpers ----- */
.section-badge {
  display: inline-block;
  background: var(--na-accent-lt);
  color: var(--na-accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--na-text);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--na-text-muted);
  line-height: 1.7;
  max-width: 580px;
}

/* ----- Hero ----- */
#hero {
  padding: 6rem 0 5rem;
  background: linear-gradient(135deg, #F5F3FF 0%, #EEF2FF 60%, #F9FAFB 100%);
  overflow: hidden;
}

.hero-badge {
  display: inline-block;
  background: var(--na-accent-lt);
  color: var(--na-accent);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  color: var(--na-text);
}

.hero-title span {
  background: linear-gradient(90deg, var(--na-primary), var(--na-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--na-text-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.hero-cta-group .btn {
  padding: 0.75rem 1.75rem;
  font-weight: 600;
  border-radius: var(--na-radius);
}

.hero-visual {
  position: relative;
}

.hero-card {
  background: #fff;
  border-radius: var(--na-radius-lg);
  box-shadow: var(--na-shadow-lg);
  border: 1px solid var(--na-border);
  padding: 1.5rem;
}

.hero-stat {
  background: var(--na-accent-lt);
  border-radius: var(--na-radius);
  padding: 1rem 1.25rem;
  text-align: center;
}
.hero-stat .stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--na-accent);
  line-height: 1;
}
.hero-stat .stat-label {
  font-size: 0.78rem;
  color: var(--na-text-muted);
  margin-top: 4px;
}

/* Chat bubble mockup inside hero card */
.chat-bubble {
  border-radius: 1rem;
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  line-height: 1.4;
  max-width: 80%;
  margin-bottom: 0.5rem;
}
.chat-bubble.incoming {
  background: #F3F4F6;
  color: var(--na-text);
  border-bottom-left-radius: 0.25rem;
}
.chat-bubble.outgoing {
  background: #DCF8C6;
  color: #1a1a1a;
  border-bottom-right-radius: 0.25rem;
  margin-left: auto;
}
.chat-bubble.ai {
  background: var(--na-accent-lt);
  color: var(--na-accent);
  border-bottom-left-radius: 0.25rem;
}
.chat-meta {
  font-size: 0.7rem;
  color: var(--na-text-muted);
  margin-bottom: 0.75rem;
}
.chat-meta.right {
  text-align: right;
}

/* ----- How it works ----- */
#how-it-works {
  padding: 5rem 0;
  background: var(--na-bg);
}

.step-card {
  background: var(--na-bg-alt);
  border: 1px solid var(--na-border);
  border-radius: var(--na-radius-lg);
  padding: 2rem 1.5rem;
  height: 100%;
  position: relative;
  transition: box-shadow 0.2s, transform 0.2s;
}
.step-card:hover {
  box-shadow: var(--na-shadow);
  transform: translateY(-2px);
}

.step-number {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--na-primary);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.step-card h5 {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.5rem;
}
.step-card p {
  font-size: 0.9rem;
  color: var(--na-text-muted);
  margin: 0;
}

/* Connector arrow between steps — desktop only */
@media (min-width: 768px) {
  .step-connector {
    position: absolute;
    right: -1.2rem;
    top: 2.3rem;
    color: var(--na-primary);
    font-size: 1.2rem;
    opacity: 0.4;
    z-index: 1;
  }
}
@media (max-width: 767px) {
  .step-connector { display: none; }
}

/* ----- Features ----- */
#features {
  padding: 5rem 0;
  background: var(--na-bg-alt);
}

.feature-card {
  background: #fff;
  border: 1px solid var(--na-border);
  border-radius: var(--na-radius-lg);
  padding: 1.75rem;
  height: 100%;
  transition: box-shadow 0.2s, transform 0.2s;
}
.feature-card:hover {
  box-shadow: var(--na-shadow);
  transform: translateY(-2px);
}

.feature-icon {
  width: 2.75rem;
  height: 2.75rem;
  background: var(--na-accent-lt);
  color: var(--na-accent);
  border-radius: var(--na-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.feature-card h5 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--na-text-muted);
  margin: 0;
  line-height: 1.6;
}

/* ----- Pricing ----- */
#pricing {
  padding: 5rem 0;
  background: var(--na-bg);
}

.pricing-card {
  border: 1px solid var(--na-border);
  border-radius: var(--na-radius-lg);
  padding: 2.25rem 2rem;
  height: 100%;
  position: relative;
  background: #fff;
  transition: box-shadow 0.2s;
}
.pricing-card:hover {
  box-shadow: var(--na-shadow);
}
.pricing-card.featured {
  border-color: var(--na-primary);
  border-width: 2px;
  box-shadow: var(--na-shadow-lg);
}

.pricing-popular-badge {
  position: absolute;
  top: -0.85rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--na-primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.pricing-name {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--na-text-muted);
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--na-text);
  line-height: 1;
  margin-bottom: 0.25rem;
}
.pricing-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--na-text-muted);
  letter-spacing: 0;
}

.pricing-desc {
  font-size: 0.88rem;
  color: var(--na-text-muted);
  margin-bottom: 1.5rem;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
}
.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--na-text);
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--na-border);
}
.pricing-features li:last-child {
  border-bottom: none;
}
.pricing-features .check {
  color: var(--na-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-note {
  font-size: 0.8rem;
  color: var(--na-text-muted);
  text-align: center;
  margin-top: 1.5rem;
}

/* ----- Testimonials ----- */
#testimonials {
  padding: 5rem 0;
  background: var(--na-bg-alt);
}

.testimonial-placeholder {
  background: #fff;
  border: 2px dashed var(--na-border);
  border-radius: var(--na-radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  color: var(--na-text-muted);
  font-size: 0.95rem;
  max-width: 560px;
  margin: 0 auto;
}
.testimonial-placeholder .placeholder-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

/* ----- FAQ ----- */
#faq {
  padding: 5rem 0;
  background: var(--na-bg);
}

.accordion-button {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--na-text) !important;
}
.accordion-button:not(.collapsed) {
  color: var(--na-primary) !important;
  background-color: var(--na-accent-lt);
  box-shadow: none;
}
.accordion-button::after {
  filter: none;
}
.accordion-button:not(.collapsed)::after {
  filter: hue-rotate(220deg) saturate(4);
}
.accordion-item {
  border: 1px solid var(--na-border);
  border-radius: var(--na-radius) !important;
  margin-bottom: 0.6rem;
  overflow: hidden;
}
.accordion-body {
  font-size: 0.92rem;
  color: var(--na-text-muted);
  line-height: 1.7;
}

/* ----- Footer ----- */
footer {
  background: #111827;
  color: #9CA3AF;
  padding: 3.5rem 0 2rem;
}

footer .footer-brand {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}
footer .footer-tagline {
  font-size: 0.85rem;
  color: #6B7280;
  margin-bottom: 0;
}

footer h6 {
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

footer a {
  color: #9CA3AF;
  text-decoration: none;
  font-size: 0.88rem;
  display: block;
  margin-bottom: 0.5rem;
  transition: color 0.15s;
}
footer a:hover {
  color: #fff;
}

.footer-divider {
  border-color: #1F2937;
  margin: 2rem 0 1rem;
}

.footer-copy {
  font-size: 0.8rem;
  color: #4B5563;
}

/* ----- Utilities ----- */
.btn-lg-custom {
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--na-radius);
}

/* Responsive tweaks */
@media (max-width: 767px) {
  #hero {
    padding: 4rem 0 3.5rem;
    text-align: center;
  }
  .hero-subtitle,
  .section-subtitle {
    max-width: 100%;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-visual {
    margin-top: 2.5rem;
  }
  .pricing-card.featured {
    order: -1;
  }
}