/* =============================================
   DroppXAI — Main Stylesheet
   Colors: Navy #0a0f1e, Blue #2a7fff, White #ffffff
   ============================================= */

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

:root {
  --bg:        #0a0f1e;
  --bg2:       #0d1528;
  --bg3:       #111d35;
  --blue:      #2a7fff;
  --blue-light:#4d9fff;
  --blue-dark: #1a5fd0;
  --white:     #ffffff;
  --grey:      #8a9bb8;
  --border:    rgba(42, 127, 255, 0.15);
  --glow:      rgba(42, 127, 255, 0.3);
  --font:      'Inter', sans-serif;
  --radius:    12px;
  --transition: 0.25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 0 20px var(--glow);
}
.btn-primary:hover {
  background: var(--blue-light);
  box-shadow: 0 0 30px rgba(42,127,255,0.5);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.25);
}
.btn-ghost:hover {
  border-color: var(--blue);
  color: var(--blue-light);
  transform: translateY(-1px);
}
.btn-lg { padding: 14px 30px; font-size: 1rem; border-radius: 10px; }
.btn-full { width: 100%; justify-content: center; padding: 14px; font-size: 1rem; }

/* ── LAYOUT ── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 96px 0;
}
.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 14px;
}
.section h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-sub {
  color: var(--grey);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 48px;
}

/* ── NAVBAR ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 24px;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.logo-icon { width: 36px; height: 36px; }
.logo-accent { color: var(--blue); }
.nav-links {
  display: flex;
  list-style: none;
  gap: 28px;
  margin-left: auto;
}
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--grey);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--white); }
.nav-cta { margin-left: 12px; padding: 9px 20px; font-size: 0.9rem; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.4rem;
  cursor: pointer;
  margin-left: auto;
}

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  max-width: 1140px;
  margin: 0 auto;
  overflow: hidden;
  text-align: center;
}
#circuit-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.25;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.hero-actions { justify-content: center; }
.hero-sub { margin: 0 auto 36px; }
.hero-badge {
  display: inline-block;
  background: rgba(42,127,255,0.12);
  border: 1px solid rgba(42,127,255,0.3);
  color: var(--blue-light);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.gradient-text {
  background: linear-gradient(135deg, #fff 0%, var(--blue-light) 50%, var(--blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  color: var(--grey);
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 520px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ── PHONE MOCKUP ── */
.hero-visual {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
.phone-mockup {
  width: 260px;
  background: var(--bg3);
  border-radius: 28px;
  border: 1.5px solid var(--border);
  padding: 16px;
  box-shadow: 0 0 60px rgba(42,127,255,0.2), 0 40px 80px rgba(0,0,0,0.5);
}
.phone-screen { display: flex; flex-direction: column; gap: 12px; }
.chat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.chat-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-light));
  flex-shrink: 0;
}
.chat-name { font-size: 0.85rem; font-weight: 700; }
.chat-status { font-size: 0.7rem; color: #4ade80; }
.chat-messages { display: flex; flex-direction: column; gap: 8px; }
.msg { display: flex; }
.msg span {
  font-size: 0.75rem;
  line-height: 1.5;
  padding: 8px 12px;
  border-radius: 12px;
  max-width: 90%;
}
.msg.bot span {
  background: rgba(42,127,255,0.12);
  border: 1px solid var(--border);
  color: var(--white);
  border-radius: 4px 12px 12px 12px;
}
.msg.user { justify-content: flex-end; }
.msg.user span {
  background: var(--blue);
  color: var(--white);
  border-radius: 12px 4px 12px 12px;
}

/* ── ABOUT ── */
.about { background: var(--bg2); }
.about .container { text-align: center; }
.about h2 { margin-bottom: 16px; }
.about .section-sub { margin: 0 auto 56px; text-align: center; }
.stats-row {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-num {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--blue-light);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label { font-size: 0.85rem; color: var(--grey); text-transform: uppercase; letter-spacing: 0.1em; }

/* ── PRODUCTS ── */
.products { background: var(--bg); }
.products h2 { margin-bottom: 48px; }
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  position: relative;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.card:hover {
  border-color: rgba(42,127,255,0.4);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3), 0 0 30px rgba(42,127,255,0.1);
}
.card-highlight {
  border-color: rgba(42,127,255,0.4);
  background: linear-gradient(160deg, rgba(42,127,255,0.08) 0%, var(--bg3) 100%);
  box-shadow: 0 0 40px rgba(42,127,255,0.12);
}
.card-badge {
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--blue);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 100px;
  white-space: nowrap;
}
.card-icon { font-size: 2rem; margin-bottom: 16px; }
.card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; }
.card p { color: var(--grey); font-size: 0.9rem; line-height: 1.6; margin-bottom: 20px; }
.card-features { list-style: none; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-features li {
  font-size: 0.85rem;
  color: var(--grey);
  padding-left: 18px;
  position: relative;
}
.card-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
}
/* Push any btn inside a card to the bottom */
.card .btn { margin-top: auto; align-self: flex-start; }

/* ── FEATURES ── */
.features { background: var(--bg2); }
.features h2 { margin-bottom: 48px; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px 40px;
}
.feature { }
.feature-icon { font-size: 1.8rem; margin-bottom: 12px; }
.feature h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.feature p { color: var(--grey); font-size: 0.9rem; line-height: 1.6; }

/* ── CONTACT ── */
.contact { background: var(--bg); }
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.contact-text h2 { margin-bottom: 16px; }
.contact-text p { color: var(--grey); margin-bottom: 32px; }
.contact-links { display: flex; flex-direction: column; gap: 16px; }
.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--grey);
  font-size: 0.95rem;
  transition: color var(--transition);
}
.contact-link svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--blue); }
.contact-link:hover { color: var(--white); }
.contact-form { display: flex; flex-direction: column; gap: 14px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--white);
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color var(--transition);
  -webkit-appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--grey); }
.form-group select option { background: var(--bg3); color: var(--white); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--blue); }
.form-group textarea { resize: vertical; min-height: 100px; }

/* ── FOOTER ── */
.footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 32px 24px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copy { color: var(--grey); font-size: 0.85rem; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--grey); font-size: 0.85rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--white); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .live-cards { grid-template-columns: 1fr; max-width: 480px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .private-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .steps { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .hero { flex-direction: column; text-align: center; padding-top: 100px; }
  .hero-content { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-sub { margin: 0 auto 36px; }
}
@media (max-width: 640px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .features-grid { grid-template-columns: 1fr; }
  .private-grid { grid-template-columns: 1fr; }
  .stats-row { gap: 24px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .section { padding: 64px 0; }
  .card .btn { align-self: stretch; justify-content: center; }
  .faq-list { max-width: 100%; }
  .live-cards { grid-template-columns: 1fr; }
}

/* ── LIVE SECTION ── */
.live { background: var(--bg); }
.live h2 { margin-bottom: 48px; }
.live-cards {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ── PRIVATE SECTION ── */
.private { background: var(--bg2); }
.private h2 { margin-bottom: 16px; }
.private .section-sub { margin-bottom: 48px; }
.private-grid { grid-template-columns: repeat(3, 1fr); }

/* ── HOW IT WORKS ── */
.how { background: var(--bg); }
.how h2 { margin-bottom: 48px; }
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.step { text-align: center; }
.step-num {
  font-size: 3rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 12px;
}
.step h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.step p { color: var(--grey); font-size: 0.9rem; line-height: 1.6; }

/* ── FAQ ── */
.faq { background: var(--bg2); }
.faq h2 { margin-bottom: 32px; }
.faq-list { max-width: 720px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 8px;
}
.faq-q {
  padding: 18px 20px;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg3);
  transition: background var(--transition);
}
.faq-q::after {
  content: '+';
  color: var(--blue);
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-left: 12px;
}
.faq-item.open .faq-q::after { content: '−'; }
.faq-item.open .faq-q { background: rgba(42,127,255,0.08); }
.faq-a {
  display: none;
  padding: 0 20px 18px;
  color: var(--grey);
  background: var(--bg3);
  font-size: 0.95rem;
  line-height: 1.6;
}
.faq-item.open .faq-a { display: block; }
.nav-mobile-cta { display: none; }
@media (max-width: 640px) {
  .nav-mobile-cta { display: block; }
}