/* ============================================
   CONTRATIA.ES — Main Stylesheet
   Aesthetic: Refined editorial, legal-professional
   Fonts: Fraunces (display) + DM Sans (body)
   ============================================ */

:root {
  --c-ink:          #1a1a18;
  --c-ink-soft:     #4a4a46;
  --c-ink-muted:    #8a8a84;
  --c-paper:        #faf9f6;
  --c-paper-off:    #f2f0eb;
  --c-border:       #e4e2db;
  --c-accent:       #2a5c45;
  --c-accent-lt:    #e8f0ec;
  --c-accent-hover: #1e4432;
  --c-card-bg:      #ffffff;
  --radius-sm:      6px;
  --radius-md:      10px;
  --radius-lg:      16px;
  --radius-xl:      24px;
  --font-display:   'Fraunces', Georgia, serif;
  --font-body:      'DM Sans', system-ui, sans-serif;
  --max-w:          1100px;
  --nav-h:          64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-ink:          #edecea;
    --c-ink-soft:     #b0aea8;
    --c-ink-muted:    #6e6c66;
    --c-paper:        #1a1917;
    --c-paper-off:    #222220;
    --c-border:       #2e2d2a;
    --c-accent:       #4a9470;
    --c-accent-lt:    #1e3329;
    --c-accent-hover: #5aad84;
    --c-card-bg:      #242422;
  }
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--c-paper);
  color: var(--c-ink);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ---- UTILITIES ---- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.section-label {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  line-height: 1.15;
  color: var(--c-ink);
  margin-bottom: 3rem;
}

.section-title em {
  font-style: italic;
  color: var(--c-accent);
}

/* ---- BUTTONS ---- */
.btn-primary {
  display: inline-block;
  background: var(--c-accent);
  color: #fff;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  transition: background .2s, transform .15s;
  border: none;
  cursor: pointer;
}
.btn-primary:hover { background: var(--c-accent-hover); transform: translateY(-1px); }
.btn-primary.btn-large { font-size: 17px; padding: 18px 40px; border-radius: var(--radius-lg); }

.btn-ghost {
  display: inline-block;
  background: transparent;
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border);
  transition: border-color .2s, background .2s;
  cursor: pointer;
}
.btn-ghost:hover { border-color: var(--c-ink-soft); background: var(--c-paper-off); }

/* ---- NAV ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-paper);
  border-bottom: 1px solid var(--c-border);
  height: var(--nav-h);
  overflow: visible;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: -.02em;
}
.logo-dot { color: var(--c-accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 14px;
  font-weight: 400;
  color: var(--c-ink-soft);
  transition: color .15s;
}
.nav-links a:hover { color: var(--c-ink); }

.btn-nav-login {
  font-weight: 500 !important;
  color: var(--c-ink) !important;
}

.btn-nav-cta {
  background: var(--c-accent);
  color: #fff !important;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-weight: 500 !important;
  transition: background .2s !important;
}
.btn-nav-cta:hover { background: var(--c-accent-hover) !important; }

.nav-mobile-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--c-ink);
}
.nav-mobile-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: .2s;
}

.nav-mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0;
  background: var(--c-card-bg);
  border-top: 2px solid var(--c-accent);
  padding: .25rem 1.5rem 1rem;
  position: absolute;
  top: var(--nav-h);
  left: 0;
  right: 0;
  z-index: 99;
  box-shadow: 0 8px 16px rgba(0,0,0,.06);
}
.nav-mobile-menu a {
  font-size: 15px;
  color: var(--c-ink-soft);
  padding: .75rem 0;
  border-bottom: 1px solid var(--c-border);
  transition: color .15s;
}
.nav-mobile-menu a:hover { color: var(--c-accent); }
.nav-mobile-menu a:last-child { border-bottom: none; }
.nav-mobile-menu .btn-nav-cta {
  display: block;
  text-align: center;
  margin-top: .25rem;
  padding: 10px 18px;
  border-bottom: none;
}
.nav-mobile-menu.open { display: flex; }

/* ---- HERO ---- */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  padding: 4rem 0 6rem;
  overflow: hidden;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
}

.hero-badge {
  grid-column: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-accent);
  background: var(--c-accent-lt);
  padding: 6px 14px;
  border-radius: 20px;
  width: fit-content;
  animation: fadeUp .6s ease both;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-accent);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(.85); }
}

.hero-title {
  grid-column: 1;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5vw, 4.2rem);
  font-weight: 300;
  line-height: 1.08;
  color: var(--c-ink);
  animation: fadeUp .6s ease .1s both;
}

.hero-title em {
  font-style: italic;
  color: var(--c-accent);
}

.hero-subtitle {
  grid-column: 1;
  font-size: 17px;
  color: var(--c-ink-soft);
  line-height: 1.6;
  max-width: 420px;
  animation: fadeUp .6s ease .2s both;
}

.hero-actions {
  grid-column: 1;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  animation: fadeUp .6s ease .3s both;
}

.hero-note {
  grid-column: 1;
  font-size: 12px;
  color: var(--c-ink-muted);
  animation: fadeUp .6s ease .4s both;
}

/* Contract preview card */
.hero-preview {
  grid-column: 2;
  grid-row: 1 / 6;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeUp .7s ease .2s both;
}

.preview-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 360px;
  box-shadow: 0 8px 40px rgba(0,0,0,.07), 0 2px 8px rgba(0,0,0,.04);
  overflow: hidden;
}

.preview-header {
  background: var(--c-paper-off);
  border-bottom: 1px solid var(--c-border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.preview-dots { display: flex; gap: 6px; }
.preview-dots span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--c-border);
}
.preview-dots span:nth-child(1) { background: #ffbd44; }
.preview-dots span:nth-child(2) { background: #00ca56; }
.preview-dots span:nth-child(3) { background: #ff605c; }

.preview-title-bar {
  font-size: 11px;
  color: var(--c-ink-muted);
  font-family: monospace;
}

.preview-body { padding: 20px 20px 16px; }

.preview-line {
  height: 8px;
  border-radius: 4px;
  background: var(--c-paper-off);
  margin-bottom: 8px;
  animation: shimmer 2s ease infinite;
}
.preview-line.long  { width: 100%; }
.preview-line.medium { width: 72%; }
.preview-line.short { width: 45%; }
.preview-spacer { height: 12px; }

.preview-section-title {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 8px;
  margin-top: 4px;
}

@keyframes shimmer {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}

.preview-footer {
  border-top: 1px solid var(--c-border);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.preview-badge {
  font-size: 11px;
  font-weight: 500;
  color: var(--c-accent);
  background: var(--c-accent-lt);
  padding: 3px 8px;
  border-radius: 4px;
}

.preview-time {
  font-size: 11px;
  color: var(--c-ink-muted);
}

/* ---- SOCIAL PROOF ---- */
.social-proof {
  background: var(--c-paper-off);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: 1.5rem 0;
}

.proof-label {
  font-size: 12px;
  color: var(--c-ink-muted);
  text-align: center;
  margin-bottom: .75rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.proof-items {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
}

.proof-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-ink-soft);
}

/* ---- HOW IT WORKS ---- */
.how {
  padding: 7rem 0;
}

.steps {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 3rem;
}

.step {
  flex: 1;
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: box-shadow .2s, transform .2s;
}
.step:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
  transform: translateY(-2px);
}

.step-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 300;
  color: var(--c-border);
  line-height: 1;
  margin-bottom: 1rem;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: .5rem;
  color: var(--c-ink);
}

.step p {
  font-size: 14px;
  color: var(--c-ink-soft);
  line-height: 1.6;
}

.step-arrow {
  font-size: 1.5rem;
  color: var(--c-border);
  margin-top: 2.5rem;
  flex-shrink: 0;
}

.how-cta { text-align: center; }

/* ---- CONTRACTS ---- */
.contracts {
  padding: 7rem 0;
  background: var(--c-paper-off);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.contract-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.contract-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: box-shadow .2s, transform .2s;
}
.contract-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,.07);
  transform: translateY(-2px);
}
.contract-card.featured {
  border-color: var(--c-accent);
  background: var(--c-accent-lt);
}

.contract-icon {
  font-size: 1.5rem;
  color: var(--c-accent);
  margin-bottom: .75rem;
  opacity: .6;
}

.contract-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: .5rem;
  color: var(--c-ink);
}

.contract-card p {
  font-size: 13px;
  color: var(--c-ink-soft);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.contract-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--c-accent);
  transition: gap .15s;
}
.contract-link:hover { text-decoration: underline; }

/* ---- PRICING ---- */
.pricing {
  padding: 7rem 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 2rem;
}

.pricing-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--c-accent);
  box-shadow: 0 8px 32px rgba(42, 92, 69, .12);
}

.plan-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--c-accent);
  color: #fff;
  font-size: 11px;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 20px;
  white-space: nowrap;
}

.plan-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--c-ink);
  margin-bottom: .5rem;
}

.plan-price {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 300;
  color: var(--c-ink);
  line-height: 1;
  margin-bottom: 1.75rem;
}
.plan-price span {
  font-size: 1rem;
  color: var(--c-ink-muted);
  font-family: var(--font-body);
}

.plan-features {
  list-style: none;
  margin-bottom: 2rem;
}
.plan-features li {
  font-size: 14px;
  color: var(--c-ink-soft);
  padding: .5rem 0;
  border-bottom: 1px solid var(--c-border);
}
.plan-features li:last-child { border-bottom: none; }
.plan-features li.disabled { color: var(--c-ink-muted); }

.btn-plan-primary {
  display: block;
  text-align: center;
  background: var(--c-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  padding: 13px;
  border-radius: var(--radius-md);
  transition: background .2s;
}
.btn-plan-primary:hover { background: var(--c-accent-hover); }

.btn-plan-ghost {
  display: block;
  text-align: center;
  background: transparent;
  color: var(--c-ink);
  font-size: 15px;
  font-weight: 500;
  padding: 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border);
  transition: border-color .2s;
}
.btn-plan-ghost:hover { border-color: var(--c-ink-soft); }

.pricing-disclaimer {
  font-size: 12px;
  color: var(--c-ink-muted);
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.5;
  padding: 1rem;
  background: var(--c-paper-off);
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border);
}

/* ---- CTA FINAL ---- */
.cta-final {
  background: var(--c-ink);
  padding: 7rem 0;
  text-align: center;
}

.cta-final h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 300;
  color: #fff;
  margin-bottom: 2rem;
  line-height: 1.15;
}
.cta-final h2 em {
  font-style: italic;
  color: #8bc4a8;
}

.cta-final p {
  font-size: 13px;
  color: rgba(255,255,255,.4);
  margin-top: 1rem;
}

.cta-final .btn-primary {
  background: var(--c-card-bg);
  color: var(--c-ink);
}
.cta-final .btn-primary:hover {
  background: var(--c-paper-off);
}

/* ---- FOOTER ---- */
.footer {
  background: var(--c-paper-off);
  border-top: 1px solid var(--c-border);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 13px;
  color: var(--c-ink-muted);
  margin-top: .75rem;
  max-width: 220px;
  line-height: 1.5;
}

.footer-col h4 {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-ink);
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--c-ink-muted);
  margin-bottom: .5rem;
  transition: color .15s;
}
.footer-col a:hover { color: var(--c-ink); }

.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  font-size: 12px;
  color: var(--c-ink-muted);
}

.footer-disclaimer {
  max-width: 420px;
  text-align: right;
}

/* ---- ANIMATIONS ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-preview {
    grid-column: 1;
    grid-row: auto;
  }
  .hero-badge, .hero-title, .hero-subtitle, .hero-actions, .hero-note {
    grid-column: 1;
  }
  .steps { flex-direction: column; }
  .step-arrow { display: none; }
  .contract-grid { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin-inline: auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-disclaimer { text-align: left; }
  .nav-links { display: none; }
  .nav-mobile-btn { display: flex; }
}

@media (max-width: 560px) {
  .contract-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .proof-items { flex-direction: column; align-items: center; }
}

/* ============================================
   DARK MODE — overrides para componentes con
   colores hardcodeados en HTML/CSS
   ============================================ */
@media (prefers-color-scheme: dark) {

  /* Inputs, selects, textareas en toda la app */
  input, select, textarea {
    background: var(--c-card-bg) !important;
    color: var(--c-ink) !important;
    border-color: var(--c-border) !important;
    color-scheme: dark;
  }
  input::placeholder, textarea::placeholder {
    color: var(--c-ink-muted) !important;
  }

  /* Tarjetas y paneles blancos */
  .card, .auth-card, .perfil-section, .modal-inner,
  [style*="background:#fff"], [style*="background: #fff"],
  [style*="background:white"], [style*="background: white"] {
    background: var(--c-card-bg) !important;
    color: var(--c-ink) !important;
  }

  /* Alertas de cobro — vencida (rojo) */
  .alerta-cobro.vencida {
    background: rgba(220,38,38,.15) !important;
    border-color: rgba(252,165,165,.3) !important;
  }
  .alerta-cobro.vencida .alerta-cobro-texto strong { color: #f87171 !important; }
  .alerta-cobro.vencida .btn-ver-cobro { color: #f87171 !important; border-color: rgba(248,113,113,.4) !important; }

  /* Alertas de cobro — próxima (amarillo) */
  .alerta-cobro.proxima {
    background: rgba(245,158,11,.12) !important;
    border-color: rgba(253,230,138,.3) !important;
  }
  .alerta-cobro.proxima .alerta-cobro-texto strong { color: #fbbf24 !important; }
  .alerta-cobro.proxima .btn-ver-cobro { color: #fbbf24 !important; border-color: rgba(251,191,36,.4) !important; }

  /* Alertas fiscales */
  .alerta-fiscal.urgente {
    background: rgba(220,38,38,.15) !important;
    border-color: rgba(252,165,165,.3) !important;
  }
  .alerta-fiscal.urgente .alerta-fiscal-texto strong { color: #f87171 !important; }
  .alerta-fiscal.urgente .btn-ver-fiscal { color: #f87171 !important; border-color: rgba(248,113,113,.4) !important; }

  .alerta-fiscal.proximo {
    background: rgba(245,158,11,.12) !important;
    border-color: rgba(253,230,138,.3) !important;
  }
  .alerta-fiscal.proximo .alerta-fiscal-texto strong { color: #fbbf24 !important; }
  .alerta-fiscal.proximo .btn-ver-fiscal { color: #fbbf24 !important; border-color: rgba(251,191,36,.4) !important; }

  /* Plan cards */
  .plan-card.pro {
    background: rgba(245,158,11,.12) !important;
    border-color: rgba(253,230,138,.3) !important;
  }
  .plan-card.pro .plan-card-name { color: #fbbf24 !important; }
  .plan-card.pro .btn-portal { color: #fbbf24 !important; border-color: rgba(251,191,36,.4) !important; }
  .plan-card.pro .btn-portal:hover { background: rgba(245,158,11,.2) !important; }

  .plan-card.empresa {
    background: rgba(99,102,241,.12) !important;
    border-color: rgba(165,180,252,.3) !important;
  }
  .plan-card.empresa .plan-card-name { color: #a5b4fc !important; }
  .plan-card.empresa .btn-portal { color: #a5b4fc !important; border-color: rgba(165,180,252,.4) !important; }
  .plan-card.empresa .btn-portal:hover { background: rgba(99,102,241,.2) !important; }
  .plan-card-perks { color: var(--c-ink-muted) !important; }

  /* Badges de estado en facturas */
  .estado-enviada  { background: rgba(37,99,235,.2) !important; color: #93c5fd !important; }
  .estado-vencida  { background: rgba(220,38,38,.2) !important; color: #f87171 !important; }
  .estado-cobrada  { background: rgba(22,163,74,.2) !important; color: #86efac !important; }
  .estado-borrador { background: rgba(107,114,128,.2) !important; color: var(--c-ink-muted) !important; }

  /* Modal de contrato (doc preview) — mantener fondo blanco para simular papel */
  .modal-doc { background: #fff !important; color: #1a1a18 !important; }
  .modal-doc * { color: inherit; }

  /* Tour / onboarding modal */
  .tour-overlay > div, .modal-box {
    background: var(--c-card-bg) !important;
    color: var(--c-ink) !important;
  }

  /* Danger hover en botones */
  .modal-btn.danger:hover {
    background: rgba(220,38,38,.15) !important;
    color: #f87171 !important;
    border-color: rgba(248,113,113,.4) !important;
  }

  /* Nav */
  .nav { background: var(--c-paper) !important; border-color: var(--c-border) !important; }

  /* Stat valores coloreados */
  .stat-value.naranja { color: #fbbf24 !important; }
  .stat-value.rojo    { color: #f87171 !important; }

  /* Chart ticks */
  canvas { filter: brightness(.9); }
}