:root {
  --bg: #09090b;
  --surface: rgba(20, 20, 23, 0.6);
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.18);
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #52525b;
  --accent: #10b981;
  --accent-muted: rgba(16, 185, 129, 0.08);
  --error: #f43f5e;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{color:var(--text-primary);font-family:'Inter',system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body{
  min-height:100vh;
  min-height:100dvh;
  display:flex;
  flex-direction:column;
  background-image:
    linear-gradient(rgba(9, 9, 11, 0.85), rgba(9, 9, 11, 0.95)),
    url('https://app.ia.chatbotevolution.net/uploads/ChatbotEvolutionVentas/4a66a618-f333-44eb-836d-8dcd18b248a3.jpg');
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-color: var(--bg);
}

.topbar {
  position: fixed;top: 0;left: 0;right: 0;height: 64px;
  display: flex;align-items: center;justify-content: space-between;
  padding: 0 32px;z-index: 20;
  border-bottom: 1px solid var(--border);
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);-webkit-backdrop-filter: blur(12px);
}
.brand {display: flex;align-items: center;gap: 12px}
.brand-mark {
  width: 24px;height: 24px;
  border-radius: 4px;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}
.brand-name {font-size: 14px;font-weight: 600;letter-spacing: -0.01em}
.brand-name span {color: var(--text-secondary);font-weight: 400}

.progress {
  position: fixed;top: 64px;left: 0;right: 0;height: 2px;background: rgba(255,255,255,0.03);z-index: 25;
}
.progress > span {
  display: block;height: 100%;width: 0%;
  background: var(--accent);
  transition: width .4s cubic-bezier(.25, 1, .5, 1);
}

.stage {
  flex: 1;
  display: flex;align-items: center;justify-content: center;
  padding: 120px 24px 80px;
  position: relative;z-index: 1;
}
.slide {
  width: 100%;max-width: 680px;
  display: none;opacity: 0;
}
.slide.active {
  display: block;
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes fadeIn {
  from {opacity: 0;transform: translateY(10px)}
  to {opacity: 1;transform: translateY(0)}
}

.qnum {
  font-size: 12px;text-transform: uppercase;letter-spacing: 0.1em;
  color: var(--accent);font-weight: 600;margin-bottom: 16px;
  display: flex;align-items: center;gap: 8px;
}
.qnum .line {width: 24px;height: 1px;background: var(--accent);display: inline-block}
h1.q, h2.q {
  font-size: clamp(24px, 2.8vw, 32px);line-height: 1.3;
  color: var(--text-primary);font-weight: 600;letter-spacing: -0.02em;
  margin-bottom: 12px;
}
p.sub {
  font-size: 15px;color: var(--text-secondary);line-height: 1.6;margin-bottom: 32px;
}
.required {color: var(--accent);margin-left: 2px}

.field {margin-top: 24px}
.field label {display: block;font-size: 13px;color: var(--text-secondary);margin-bottom: 8px;font-weight: 500}
.input, .textarea, .select {
  width: 100%;background: transparent;border: 0;
  border-bottom: 1px solid var(--border);
  color: #fff;font-size: 18px;padding: 10px 0;outline: none;
  font-family: inherit;transition: border-color 0.2s ease;
}
.input::placeholder, .textarea::placeholder {color: var(--text-muted)}
.input:focus, .textarea:focus, .select:focus {border-bottom-color: var(--text-primary)}
.textarea {min-height: 100px;resize: vertical;line-height: 1.6}

.tel-row {display: flex;align-items: flex-end;gap: 16px}
.tel-row .select {max-width: 160px;cursor: pointer}
.tel-row .select option {background: var(--bg);color: #fff}

.err {color: var(--error);font-size: 13px;margin-top: 8px;display: none}
.err.show {display: block}

.opts {display: flex;flex-direction:column;gap: 12px;margin-top: 12px}
.opt {
  display: flex;align-items: center;justify-content: space-between;
  background: var(--surface);border: 1px solid var(--border);
  border-radius: 8px;padding: 16px 20px;cursor: pointer;
  transition: all 0.2s ease;user-select: none;font-size: 15px;color: var(--text-primary);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.opt:hover {border-color: var(--border-hover);background: rgba(255,255,255,0.01)}
.opt .key {
  font-size: 11px;font-weight: 600;color: var(--text-muted);
  border: 1px solid var(--border);padding: 2px 6px;border-radius: 4px;
  background: var(--bg);transition: all 0.2s;
}
.opt.selected {
  background: var(--accent-muted);
  border-color: var(--accent);
}
.opt.selected .key {
  color: var(--accent);border-color: var(--accent);
}

.scale {display: flex;gap: 8px;margin-top: 12px}
.scale .opt {flex: 1;justify-content: center;padding: 16px 0;border-radius: 6px;font-weight: 500}
.scale-labels {display: flex;justify-content: space-between;color: var(--text-muted);font-size: 12px;margin-top: 12px}

.cta-row {display: flex;align-items: center;gap: 16px;margin-top: 40px}
.btn {
  appearance: none;-webkit-appearance: none;
  border: 0;cursor: pointer;font-family: inherit;
  font-weight: 500;font-size: 14px;padding: 12px 24px;border-radius: 6px;
  display: inline-flex;align-items: center;gap: 8px;transition: all 0.2s ease;
  text-decoration: none;
}
.btn.primary {
  background: var(--text-primary);color: var(--bg);
}
.btn.primary:hover {
  background: #ffffff;transform: translateY(-1px);
}
.btn.ghost {
  background: transparent;color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn.ghost:hover {
  border-color: var(--border-hover);color: var(--text-primary);
}
.btn .kbd {
  font-size: 10px;color: var(--text-muted);border: 1px solid rgba(0,0,0,0.15);
  padding: 1px 4px;border-radius: 3px;font-weight: 400;margin-left: 4px;
}
.btn.ghost .kbd {border-color: var(--border)}
.time-hint {color: var(--text-muted);font-size: 13px}

.welcome h1 {
  font-size: clamp(28px, 4.2vw, 44px);font-weight: 700;line-height: 1.2;
  letter-spacing: -0.03em;margin-bottom: 20px;color: var(--text-primary);
}
.welcome p.lead {
  font-size: 17px;color: var(--text-secondary);line-height: 1.6;max-width: 600px;margin-bottom: 40px;
}
.stats {display: flex;gap: 40px;margin-bottom: 40px;border-top: 1px solid var(--border);padding-top: 32px}
.stat {text-align: left}
.stat b {display: block;font-size: 24px;font-weight: 600;color: var(--text-primary);letter-spacing: -0.02em}
.stat span {display: block;color: var(--text-muted);font-size: 11px;letter-spacing: 0.05em;text-transform: uppercase;margin-top: 4px}

.scarcity-box {
  background: var(--surface);border: 1px solid var(--border);
  border-radius: 8px;padding: 16px 20px;font-size: 13px;line-height: 1.6;
  color: var(--text-secondary);text-align: left;margin-top: 48px;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.scarcity-box b {color: var(--text-primary);font-weight: 500}

.success {text-align: left}
.success h1 {font-size: clamp(24px, 3.5vw, 36px);font-weight: 600;letter-spacing: -0.02em;margin-bottom: 16px}
.success p {color: var(--text-secondary);font-size: 16px;line-height: 1.6;margin-bottom: 40px}
.success .next-steps {display: flex;flex-direction: column;gap: 16px;margin-bottom: 40px}
.success .step {
  background: var(--surface);border: 1px solid var(--border);border-radius: 8px;padding: 20px;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.success .step b {display: block;font-size: 12px;text-transform: uppercase;letter-spacing: 0.05em;color: var(--accent);margin-bottom: 6px}
.success .step span {color: var(--text-secondary);font-size: 14px;line-height: 1.5}

#confetti {position: fixed;inset: 0;pointer-events: none;z-index: 15}

.nav {
  position: fixed;right: 32px;bottom: 32px;display: flex;gap: 8px;z-index: 20;
}
.nav button {
  width: 40px;height: 40px;background: var(--surface);border: 1px solid var(--border);
  border-radius: 6px;color: var(--text-secondary);cursor: pointer;
  display: grid;place-items: center;transition: all 0.2s;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.nav button:hover:not(:disabled) {border-color: var(--border-hover);color: var(--text-primary)}
.nav button:disabled {opacity: 0.25;cursor: not-allowed}

.poweredby {
  position: fixed;left: 32px;bottom: 44px;z-index: 20;
  font-size: 11px;color: var(--text-muted);letter-spacing: 0.02em;
}
.poweredby b {color: var(--text-secondary);font-weight: 500}

.inline {display: flex;gap: 20px;flex-wrap: wrap}
.inline > div {flex: 1;min-width: 200px}

@media (max-width: 768px) {
  .topbar {padding: 0 20px}
  .stage {padding: 100px 20px 100px;align-items: flex-start}
  .stats {flex-direction: column;gap: 20px}
  .scale .opt {padding: 12px 0;font-size: 15px}
  .nav {right: 20px;bottom: 20px}
  .poweredby {display: none}
  .cta-row {flex-direction: column;align-items: stretch}
  .btn {width: 100%;justify-content: center}
  .time-hint {text-align: center;margin-top: 8px}
}