/* KVoice Web — tokens de marca */
:root {
  --kv-primary: #1B3A5C;
  --kv-primary-hover: #14283F;
  --kv-primary-soft: #E8EEF6;
  --kv-accent: #3FB8E0;
  --kv-accent-hover: #2BA0C8;
  --kv-accent-soft: #E3F5FB;
  --kv-bg: #FFFFFF;
  --kv-bg-subtle: #F5F8FC;
  --kv-text: #0F1F33;
  --kv-text-muted: #5B6B7E;
  --kv-divider: #E4EBF3;
  --kv-success: #2EB872;
  --kv-danger: #D9453C;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(27, 58, 92, 0.08);
}

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--kv-bg);
  color: var(--kv-text);
  line-height: 1.6;
}

a { color: var(--kv-primary); text-decoration: none; }
a:hover { color: var(--kv-accent-hover); }

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--kv-bg);
  border-bottom: 1px solid var(--kv-divider);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.logo img { height: 44px; width: auto; }

.main-nav { display: flex; gap: 1.75rem; align-items: center; }
.main-nav a {
  color: var(--kv-primary);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--kv-accent-hover);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn-primary { background: var(--kv-primary); color: #fff; }
.btn-primary:hover { background: var(--kv-primary-hover); color: #fff; }

.btn-accent { background: var(--kv-accent); color: #fff; }
.btn-accent:hover { background: var(--kv-accent-hover); color: #fff; }

.btn-outline {
  background: transparent;
  color: var(--kv-primary);
  border: 2px solid var(--kv-primary);
}
.btn-outline:hover { background: var(--kv-primary-soft); }

.btn:disabled, .btn-disabled {
  background: var(--kv-divider);
  color: var(--kv-text-muted);
  cursor: default;
}

/* Hero */
.hero {
  padding: 4rem 0 3rem;
  background: linear-gradient(180deg, var(--kv-bg-subtle) 0%, var(--kv-bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  color: var(--kv-primary);
  margin: 0 0 1rem;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--kv-text-muted);
  margin-bottom: 1.75rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.hero-visual {
  text-align: center;
}
.hero-visual img { max-width: 100%; height: auto; max-height: 320px; }

/* Sections */
.section { padding: 4rem 0; }
.section-alt { background: var(--kv-bg-subtle); }

.section-title {
  text-align: center;
  font-size: 1.75rem;
  color: var(--kv-primary);
  margin: 0 0 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--kv-text-muted);
  margin: 0 0 2.5rem;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.step-card {
  background: var(--kv-bg);
  border: 1px solid var(--kv-divider);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
}

.step-num {
  width: 40px; height: 40px;
  background: var(--kv-accent-soft);
  color: var(--kv-primary);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

/* Compare problem */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.compare-card {
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--kv-divider);
}

.compare-card.bad { opacity: 0.75; }
.compare-card.good {
  border-color: var(--kv-accent);
  background: var(--kv-accent-soft);
}

/* Plans grid */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  align-items: stretch;
}

.plan-card {
  border: 2px solid var(--kv-divider);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  background: var(--kv-bg);
  position: relative;
}

.plan-card.popular { border-color: var(--kv-accent); box-shadow: var(--shadow); }

.plan-badge {
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--kv-accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
  white-space: nowrap;
}

.plan-name { font-size: 1.1rem; font-weight: 700; color: var(--kv-primary); margin: 0 0 0.25rem; }
.plan-price { font-size: 1.5rem; font-weight: 700; color: var(--kv-text); }
.plan-period { font-size: 0.85rem; color: var(--kv-text-muted); }

.plan-features {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  flex: 1;
  font-size: 0.88rem;
}

.plan-features li {
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.plan-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--kv-success);
  font-weight: 700;
}

/* Comparison table */
.comparison-table-wrap { overflow-x: auto; margin-top: 2rem; }

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.comparison-table th,
.comparison-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--kv-divider);
  text-align: left;
}

.comparison-table th {
  background: var(--kv-primary-soft);
  color: var(--kv-primary);
  font-weight: 600;
}

.comparison-table .check { color: var(--kv-success); font-weight: 700; }
.comparison-table .cross { color: var(--kv-text-muted); }

/* Auth cards */
.auth-page {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--kv-bg);
  border: 1px solid var(--kv-divider);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-weight: 500; margin-bottom: 0.35rem; font-size: 0.9rem; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--kv-divider);
  border-radius: 8px;
  font: inherit;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--kv-accent);
  box-shadow: 0 0 0 3px var(--kv-accent-soft);
}

.form-error { color: var(--kv-danger); font-size: 0.85rem; margin-top: 0.5rem; }

.divider-or {
  text-align: center;
  color: var(--kv-text-muted);
  margin: 1rem 0;
  font-size: 0.85rem;
}

/* Profile */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.profile-card {
  border: 1px solid var(--kv-divider);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.profile-card h3 { margin: 0 0 1rem; color: var(--kv-primary); }

.usage-stat {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--kv-divider);
  font-size: 0.95rem;
}

.plan-banner {
  background: var(--kv-primary-soft);
  border: 1px solid var(--kv-divider);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  display: none;
}

.plan-banner.visible { display: block; }

/* Footer */
.site-footer {
  background: var(--kv-primary);
  color: rgba(255,255,255,0.85);
  padding: 2.5rem 0 1.5rem;
  margin-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.site-footer a { color: rgba(255,255,255,0.9); }
.site-footer a:hover { color: var(--kv-accent); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 1rem;
  font-size: 0.85rem;
  text-align: center;
}

/* Demo widget */
.demo-box {
  border: 2px dashed var(--kv-accent);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: var(--kv-accent-soft);
}

.demo-steps { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem; }
.demo-step {
  flex: 1;
  min-width: 120px;
  padding: 0.75rem;
  background: var(--kv-bg);
  border-radius: 8px;
  text-align: center;
  font-size: 0.85rem;
  cursor: pointer;
  border: 2px solid transparent;
}
.demo-step.active { border-color: var(--kv-accent); font-weight: 600; }
.demo-result {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--kv-bg);
  border-radius: 8px;
  font-family: monospace;
  font-size: 0.8rem;
  word-break: break-all;
  display: none;
}
.demo-result.visible { display: block; }

@media (max-width: 900px) {
  .hero-grid, .plans-grid, .steps, .compare-grid, .profile-grid, .footer-grid {
    grid-template-columns: 1fr;
  }
  .plans-grid { max-width: 360px; margin: 0 auto; }
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: var(--kv-bg);
    padding: 1rem;
    border-bottom: 1px solid var(--kv-divider);
    box-shadow: var(--shadow);
  }
  .menu-toggle { display: block; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--kv-primary); }
}

@media (min-width: 901px) {
  .menu-toggle { display: none; }
}