/* ============================================
   FRACTIONAL. FUNDING EXPERTS — Design System
   Manual de Marca v1.0 · 2026
   ============================================ */

/* --- Google Fonts cargadas desde HTML con preconnect (ver <head> de cada página) --- */

/* --- CSS Custom Properties (Brand Tokens) --- */
:root {
  /* Core Palette */
  --ink: #0B0D0C;
  --paper: #F4F1EA;
  --signal: #D4FF3A;

  /* Surface Tiers */
  --surface: #121413;
  --surface-dim: #121413;
  --surface-container-lowest: #0d0f0e;
  --surface-container-low: #1a1c1b;
  --surface-container: #1e201f;
  --surface-container-high: #282a29;
  --surface-container-highest: #333534;
  --surface-bright: #383a38;

  /* On-Surface */
  --on-surface: #e2e3e0;
  --on-surface-variant: #c5c9ae;

  /* Outline */
  --outline: #8f937a;
  --outline-variant: #444934;

  /* Typography */
  --font-headline: 'Poppins', sans-serif;
  --font-body: 'Poppins', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing Scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 96px;
  --space-4xl: 128px;

  /* Radius */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--ink);
  color: var(--on-surface);
  line-height: 1.6;
  overflow-x: hidden;
}

::selection {
  background-color: var(--signal);
  color: var(--ink);
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }

/* --- Typography --- */
.font-mono { font-family: var(--font-mono); }

.display-lg {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.headline-lg {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.headline-md {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.label-md {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.label-sm {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.body-lg {
  font-size: 1.125rem;
  line-height: 1.7;
}

.body-md {
  font-size: 1rem;
  line-height: 1.6;
}

/* --- Colors --- */
.text-ink { color: var(--ink); }
.text-paper { color: var(--paper); }
.text-signal { color: var(--signal); }
.text-muted { color: #9ca3af; }
.text-dim { color: rgba(226, 227, 224, 0.4); }

.bg-ink { background-color: var(--ink); }
.bg-paper { background-color: var(--paper); }
.bg-signal { background-color: var(--signal); }
.bg-surface { background-color: var(--surface); }
.bg-surface-low { background-color: var(--surface-container-low); }
.bg-surface-container { background-color: var(--surface-container); }
.bg-surface-high { background-color: var(--surface-container-high); }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .container { padding: 0 48px; }
}

@media (min-width: 1024px) {
  .container { padding: 0 96px; }
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

/* --- Fractional Logo (SVG inline) --- */
.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-wordmark {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  color: white;
  line-height: 1;
}

.logo-wordmark .dot {
  color: var(--signal);
}

.logo-tagline {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.5625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
}

/* Isotipo: 3 barras decrecientes */
.isotipo {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 28px;
}

.isotipo .bar {
  width: 6px;
  border-radius: 2px;
}

.isotipo .bar-1 {
  height: 100%;
  background-color: rgba(255,255,255,0.85);
}

.isotipo .bar-2 {
  height: 60%;
  background-color: rgba(255,255,255,0.85);
}

.isotipo .bar-3 {
  height: 30%;
  background-color: var(--signal);
}

/* Logo on paper background */
.logo-on-paper .logo-wordmark { color: var(--ink); }
.logo-on-paper .logo-tagline { color: rgba(11,13,12,0.5); }
.logo-on-paper .isotipo .bar-1,
.logo-on-paper .isotipo .bar-2 { background-color: var(--ink); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: transform 200ms cubic-bezier(0.4, 0, 0.2, 1),
              background-color 200ms ease;
}

.btn:hover { transform: scale(1.02); }

.btn-primary {
  background-color: var(--signal);
  color: var(--ink);
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid rgba(255,255,255,0.15);
  color: white;
}

.btn-secondary:hover {
  background-color: rgba(255,255,255,0.05);
}

.btn-dark {
  background-color: var(--ink);
  color: white;
}

.btn-lg {
  padding: 20px 40px;
  font-size: 0.875rem;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(11, 13, 12, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

@media (min-width: 1024px) {
  .site-header { padding: 16px 48px; }
}

.nav-links {
  display: none;
  gap: 32px;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  transition: color 200ms;
}

.nav-links a:hover { color: var(--signal); }

@media (min-width: 768px) {
  .nav-links { display: flex; }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-menu-btn {
  background: none;
  border: none;
  color: var(--signal);
  font-size: 28px;
  cursor: pointer;
  display: block;
}

@media (min-width: 768px) {
  .mobile-menu-btn { display: none; }
}

/* --- Sections --- */
.section {
  padding: var(--space-3xl) 0;
}

.section-paper {
  background-color: var(--paper);
  color: var(--ink);
}

.section-ink {
  background-color: var(--ink);
  color: var(--on-surface);
}

.section-signal {
  background-color: var(--signal);
  color: var(--ink);
}

/* --- Fractional Bars (decorative) --- */
.fractional-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
}

.fractional-bars .fbar {
  width: 3px;
  border-radius: 1px;
  background-color: rgba(212, 255, 58, 0.3);
}

.fractional-bars .fbar.active {
  background-color: var(--signal);
}

@media (min-width: 768px) {
  .fractional-bars .fbar { width: 4px; }
  .fractional-bars { gap: 6px; }
}

/* --- Metric Card --- */
.metric-card {
  background-color: var(--surface-container-low);
  padding: var(--space-xl);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--signal);
  transition: background-color 300ms;
}

.metric-card:hover {
  background-color: var(--surface-container);
}

.metric-value {
  font-family: var(--font-mono);
  color: var(--signal);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #9ca3af;
}

/* --- Process Step --- */
.process-step {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0;
  border-bottom: 1px solid rgba(11,13,12,0.1);
}

.step-info { display: flex; flex-direction: column; }

.step-number {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: rgba(11,13,12,0.3);
}

.step-title {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.step-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--signal);
  background-color: var(--ink);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
}

/* --- Problem Item --- */
.problem-item {
  display: flex;
  gap: var(--space-lg);
}

.problem-number {
  font-family: var(--font-mono);
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 300;
  color: rgba(11,13,12,0.08);
  flex-shrink: 0;
  transition: color 300ms;
}

.problem-item:hover .problem-number {
  color: var(--signal);
}

.problem-title {
  font-weight: 700;
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.problem-text {
  color: rgba(11,13,12,0.6);
  font-size: 1.0625rem;
  line-height: 1.6;
}

/* --- Convocatoria Tags --- */
.tag-group-title {
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  padding-left: 16px;
  border-left: 2px solid var(--signal);
  margin-bottom: 16px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  border: 1px solid rgba(11,13,12,0.12);
  padding: 8px 16px;
  border-radius: 100px;
  transition: all 200ms;
  cursor: default;
}

.tag:hover {
  background-color: var(--ink);
  color: white;
  border-color: var(--ink);
}

/* --- Differentiator List --- */
.diff-list { display: flex; flex-direction: column; gap: var(--space-lg); }

.diff-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.diff-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  margin-top: 2px;
}

.diff-text {
  font-size: 1.0625rem;
  color: #d1d5db;
}

.diff-text.negative {
  color: #6b7280;
  font-style: italic;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--ink);
  color: #6b7280;
  padding: var(--space-3xl) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 48px;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: color 200ms;
}

.footer-links a:hover { color: var(--signal); }

.footer-email {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  color: var(--signal);
  border-bottom: 1px solid rgba(212,255,58,0.3);
  padding-bottom: 4px;
  transition: border-color 200ms;
}

.footer-email:hover { border-color: var(--signal); }

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  opacity: 0.4;
  margin-top: var(--space-xl);
}

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp 0.6s ease-out both;
}

/* --- Mobile bottom nav --- */
.mobile-nav {
  display: flex;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: rgba(11,13,12,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255,255,255,0.05);
  justify-content: space-around;
  align-items: center;
  padding: 10px 16px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  z-index: 100;
}

@media (min-width: 768px) {
  .mobile-nav { display: none; }
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  color: #6b7280;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: all 200ms;
  text-decoration: none;
}

.mobile-nav-item.active {
  background-color: var(--signal);
  color: var(--ink);
}

.mobile-nav-item svg {
  width: 18px;
  height: 18px;
}

/* Utility: hide on mobile */
.hide-mobile { display: none; }
@media (min-width: 768px) { .hide-mobile { display: block; } }

.hide-desktop { display: block; }
@media (min-width: 768px) { .hide-desktop { display: none; } }

/* Add bottom padding on mobile for the fixed nav */
@media (max-width: 767px) {
  body { padding-bottom: 72px; }
}

/* ─── Mobile responsive overrides ─── */
@media (max-width: 767px) {
  /* Reduce large section padding set via inline styles */
  .section { padding-top: 72px !important; padding-bottom: 56px !important; }

  /* Pricing cards: never narrower than full width on mobile */
  .pricing-grid { grid-template-columns: 1fr !important; }

  /* btn full width on mobile where it's standalone */
  .btn-block-mobile { width: 100% !important; text-align: center; justify-content: center; }

  /* Legal / static pages: reduce top padding */
  .legal-content { padding-top: 96px !important; }
}

/* ─── Accesibilidad ─── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  padding: 12px 24px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  transition: top 0.15s;
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 2px;
}
.btn:focus-visible {
  outline-color: var(--signal);
  outline-offset: 4px;
}
