/* ===== DESIGN TOKENS ===== */
:root {
  --navy: #0f172a;
  --navy-light: #1e293b;
  --cyan: #06b6d4;
  --cyan-dark: #0891b2;
  --cyan-glow: rgba(6, 182, 212, 0.15);
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --green: #10b981;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.1), 0 6px 10px rgba(0,0,0,.08);
  --transition: 0.25s cubic-bezier(.4,0,.2,1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: 'Inter', sans-serif; color: var(--navy); background: var(--white); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
ul { list-style: none; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-label { font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--cyan); margin-bottom: 12px; }
.section-title { font-size: clamp(28px, 4vw, 40px); font-weight: 800; line-height: 1.2; margin-bottom: 16px; }
.section-sub { font-size: 17px; color: var(--gray-500); max-width: 600px; margin-bottom: 48px; }

/* ===== BUTTONS ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600; border: none; transition: var(--transition); }
.btn-primary { background: var(--cyan); color: var(--white); }
.btn-primary:hover { background: var(--cyan-dark); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(6,182,212,.35); }
.btn-ghost { background: transparent; color: var(--navy); border: 1.5px solid var(--gray-300); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-sm { padding: 10px 20px; font-size: 14px; }

/* ===== NAVBAR ===== */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(255,255,255,.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--gray-200); transition: var(--transition); }
.navbar.scrolled { box-shadow: var(--shadow); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-logo { font-size: 22px; font-weight: 800; color: var(--navy); }
.nav-logo span { color: var(--cyan); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--gray-600); transition: var(--transition); }
.nav-links a:hover { color: var(--cyan); }
.nav-cta { margin-left: 8px; }
.nav-hamburger { display: none; background: none; border: none; flex-direction: column; gap: 5px; padding: 4px; }
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--navy); border-radius: 2px; transition: var(--transition); }

/* ===== HERO ===== */
.hero { padding: 140px 0 96px; background: linear-gradient(170deg, var(--gray-50) 0%, var(--white) 60%); overflow: hidden; }
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: var(--cyan-glow); color: var(--cyan-dark); font-size: 13px; font-weight: 600; padding: 6px 14px; border-radius: 100px; margin-bottom: 20px; }
.hero-badge::before { content: ''; width: 7px; height: 7px; background: var(--cyan); border-radius: 50%; }
.hero h1 { font-size: clamp(32px, 5vw, 52px); font-weight: 800; line-height: 1.15; margin-bottom: 20px; letter-spacing: -0.5px; }
.hero h1 em { font-style: normal; color: var(--cyan); }
.hero-sub { font-size: 17px; color: var(--gray-500); margin-bottom: 28px; max-width: 520px; }
.hero-bullets { margin-bottom: 36px; }
.hero-bullets li { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; color: var(--gray-600); margin-bottom: 10px; }
.hero-bullets li::before { content: '✓'; color: var(--cyan); font-weight: 700; flex-shrink: 0; margin-top: 1px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }

/* Hero right — visual card */
.hero-visual { position: relative; }
.hero-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow-lg); }
.hero-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.hero-card-avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--cyan), #38bdf8); display: flex; align-items: center; justify-content: center; color: white; font-weight: 700; font-size: 16px; }
.hero-card-info h4 { font-size: 15px; font-weight: 700; }
.hero-card-info p { font-size: 13px; color: var(--gray-400); }
.hero-card-row { display: flex; gap: 12px; margin-bottom: 16px; }
.hero-card-tag { font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 100px; background: var(--gray-100); color: var(--gray-600); }
.hero-card-bar { height: 6px; border-radius: 100px; background: var(--gray-100); margin-bottom: 10px; overflow: hidden; }
.hero-card-bar span { display: block; height: 100%; border-radius: 100px; }
.hero-card-bar .fill-1 { width: 90%; background: var(--cyan); }
.hero-card-bar .fill-2 { width: 75%; background: var(--green); }
.hero-card-bar .fill-3 { width: 85%; background: #8b5cf6; }
.hero-card-label { font-size: 12px; color: var(--gray-400); margin-bottom: 6px; }

.trust-badges { display: flex; gap: 24px; margin-top: 24px; flex-wrap: wrap; }
.trust-badge { display: flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--gray-600); }
.trust-badge-icon { width: 28px; height: 28px; border-radius: 50%; background: var(--cyan-glow); display: flex; align-items: center; justify-content: center; font-size: 14px; }

/* ===== CHATBOT ===== */
.chatbot-section { background: var(--navy); color: var(--white); position: relative; overflow: hidden; }
.chatbot-section::before { content: ''; position: absolute; top: -200px; right: -200px; width: 500px; height: 500px; border-radius: 50%; background: rgba(6,182,212,.08); }
.chatbot-section .section-label { color: var(--cyan); }
.chatbot-section .section-sub { color: var(--gray-400); }
.chatbot-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.chatbot-info h2 { color: var(--white); }

.chatbot-examples { margin-top: 32px; }
.chatbot-examples h4 { font-size: 14px; font-weight: 600; color: var(--gray-400); margin-bottom: 14px; }
.chatbot-examples ul li { font-size: 14px; color: var(--gray-300); padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.06); }

/* Chat panel */
.chat-panel { background: var(--navy-light); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; height: 480px; }
.chat-header { padding: 16px 20px; border-bottom: 1px solid rgba(255,255,255,.06); display: flex; align-items: center; gap: 10px; }
.chat-header-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--green); }
.chat-header span { font-size: 14px; font-weight: 600; color: var(--gray-300); }
.chat-messages { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--gray-600); border-radius: 4px; }
.chat-msg { max-width: 82%; padding: 12px 16px; border-radius: var(--radius); font-size: 14px; line-height: 1.55; animation: msgIn .3s ease; }
@keyframes msgIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.chat-msg.bot { background: rgba(255,255,255,.06); color: var(--gray-200); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-msg.user { background: var(--cyan); color: var(--white); align-self: flex-end; border-bottom-right-radius: 4px; }
.chat-msg.typing .dots { display: inline-flex; gap: 4px; }
.chat-msg.typing .dots span { width: 6px; height: 6px; background: var(--gray-400); border-radius: 50%; animation: bounce .6s infinite alternate; }
.chat-msg.typing .dots span:nth-child(2) { animation-delay: .15s; }
.chat-msg.typing .dots span:nth-child(3) { animation-delay: .3s; }
@keyframes bounce { to { transform: translateY(-5px); opacity: .4; } }

.chat-prompts { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 20px 14px; }
.chat-prompt-chip { font-size: 12px; font-weight: 500; padding: 7px 14px; border-radius: 100px; border: 1px solid rgba(255,255,255,.12); background: transparent; color: var(--gray-300); cursor: pointer; transition: var(--transition); white-space: nowrap; }
.chat-prompt-chip:hover { border-color: var(--cyan); color: var(--cyan); }

.chat-input-area { display: flex; gap: 8px; padding: 14px 20px; border-top: 1px solid rgba(255,255,255,.06); }
.chat-input { flex: 1; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius-sm); padding: 11px 16px; color: var(--white); font-size: 14px; outline: none; transition: var(--transition); }
.chat-input::placeholder { color: var(--gray-500); }
.chat-input:focus { border-color: var(--cyan); }
.chat-send { background: var(--cyan); border: none; border-radius: var(--radius-sm); padding: 0 18px; color: var(--white); font-weight: 600; font-size: 14px; transition: var(--transition); }
.chat-send:hover { background: var(--cyan-dark); }
.chat-send:disabled { opacity: .5; cursor: not-allowed; }

/* ===== HOW IT WORKS ===== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.step-card { text-align: center; padding: 32px 20px; border-radius: var(--radius); border: 1px solid var(--gray-200); transition: var(--transition); position: relative; }
.step-card:hover { border-color: var(--cyan); box-shadow: 0 4px 20px var(--cyan-glow); transform: translateY(-4px); }
.step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--cyan-glow); color: var(--cyan); font-size: 18px; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.step-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 14px; color: var(--gray-500); }

/* ===== DEVELOPERS ===== */
.devs-section { background: var(--gray-50); }
.roles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 40px; }
.role-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 24px; transition: var(--transition); }
.role-card:hover { border-color: var(--cyan); }
.role-icon { font-size: 28px; margin-bottom: 12px; }
.role-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.role-card p { font-size: 14px; color: var(--gray-500); }
.tech-strip { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.tech-tag { font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 100px; background: var(--white); border: 1px solid var(--gray-200); color: var(--gray-600); }
.ai-callout { background: linear-gradient(135deg, var(--navy), var(--navy-light)); color: var(--white); padding: 32px; border-radius: var(--radius-lg); display: flex; align-items: center; gap: 24px; }
.ai-callout-icon { font-size: 40px; flex-shrink: 0; }
.ai-callout h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.ai-callout p { font-size: 14px; color: var(--gray-400); }

/* ===== PRICING ===== */
.pricing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; max-width: 800px; margin: 0 auto 48px; }
.price-card { border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 40px 32px; transition: var(--transition); position: relative; background: var(--white); }
.price-card.featured { border-color: var(--cyan); box-shadow: 0 0 0 1px var(--cyan), 0 8px 30px var(--cyan-glow); }
.price-card.featured::before { content: 'Most Popular'; position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--cyan); color: white; font-size: 12px; font-weight: 700; padding: 4px 16px; border-radius: 100px; }
.price-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.price-card .price-desc { font-size: 14px; color: var(--gray-500); margin-bottom: 20px; }
.price-amount { font-size: 42px; font-weight: 800; margin-bottom: 4px; }
.price-amount span { font-size: 16px; font-weight: 500; color: var(--gray-400); }
.price-note { font-size: 13px; color: var(--gray-400); margin-bottom: 28px; }
.price-features { margin-bottom: 32px; }
.price-features li { font-size: 14px; color: var(--gray-600); padding: 8px 0; display: flex; align-items: flex-start; gap: 10px; }
.price-features li::before { content: '✓'; color: var(--cyan); font-weight: 700; flex-shrink: 0; }
.price-card .btn { width: 100%; justify-content: center; }

/* ===== TRUST ===== */
.trust-section { background: var(--gray-50); }
.logos-strip { display: flex; align-items: center; justify-content: center; gap: 48px; margin-bottom: 60px; flex-wrap: wrap; }
.logo-placeholder { font-size: 16px; font-weight: 700; color: var(--gray-300); letter-spacing: 1px; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 28px; }
.testimonial-card .stars { color: #f59e0b; font-size: 14px; margin-bottom: 12px; letter-spacing: 2px; }
.testimonial-card blockquote { font-size: 15px; color: var(--gray-600); line-height: 1.6; margin-bottom: 20px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--cyan-glow); display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--cyan); font-size: 15px; }
.testimonial-name { font-size: 14px; font-weight: 700; }
.testimonial-role { font-size: 13px; color: var(--gray-400); }

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--gray-200); }
.faq-question { width: 100%; background: none; border: none; text-align: left; padding: 22px 0; font-size: 16px; font-weight: 600; color: var(--navy); display: flex; justify-content: space-between; align-items: center; gap: 16px; transition: var(--transition); }
.faq-question:hover { color: var(--cyan); }
.faq-icon { font-size: 20px; transition: var(--transition); flex-shrink: 0; color: var(--gray-400); }
.faq-item.open .faq-icon { transform: rotate(45deg); color: var(--cyan); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-answer-inner { padding: 0 0 22px; font-size: 15px; color: var(--gray-500); line-height: 1.7; }

/* ===== FINAL CTA ===== */
.final-cta { background: linear-gradient(135deg, var(--navy), var(--navy-light)); color: var(--white); text-align: center; }
.final-cta .section-title { color: var(--white); }
.final-cta .section-sub { color: var(--gray-400); margin-left: auto; margin-right: auto; }

/* ===== FOOTER ===== */
.footer { background: var(--navy); color: var(--gray-400); padding: 48px 0 32px; border-top: 1px solid rgba(255,255,255,.06); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand h3 { color: var(--white); font-size: 20px; margin-bottom: 10px; }
.footer-brand h3 span { color: var(--cyan); }
.footer-brand p { font-size: 14px; line-height: 1.6; }
.footer-col h4 { color: var(--white); font-size: 14px; font-weight: 700; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 14px; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom { text-align: center; font-size: 13px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.06); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 420px; }
  .chatbot-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; position: fixed; top: 72px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 24px; gap: 20px; border-bottom: 1px solid var(--gray-200); box-shadow: var(--shadow-lg); }
  .nav-links.open { display: flex; }
  .nav-hamburger { display: flex; }
  .section { padding: 64px 0; }
  .roles-grid { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .chat-panel { height: 420px; }
}
@media (max-width: 480px) {
  .steps-grid, .roles-grid { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
  .trust-badges { flex-direction: column; gap: 12px; }
  .ai-callout { flex-direction: column; text-align: center; }
  .logos-strip { gap: 24px; }
}