/* =============================================================
   Calcu.mx Replica — Portal de Calculadoras Financieras
   Direction: Clean utility, calcu.mx inspired
   Primary: Teal #0D9488
   Typography: Inter (UI) + Space Grotesk (headings)
   ============================================================= */

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

/* --- Design Tokens --- */
:root {
  --c-primary: #0D9488;
  --c-primary-hover: #0F766E;
  --c-primary-dark: #115E59;
  --c-primary-light: #CCFBF1;
  --c-primary-50: #F0FDFA;
  --c-primary-100: #CCFBF1;
  --c-primary-200: #99F6E4;
  --c-primary-500: #14B8A6;
  --c-primary-600: #0D9488;
  --c-primary-700: #0F766E;
  --c-primary-800: #115E59;
  --c-primary-900: #134E4A;

  --c-ink: #0F172A;
  --c-ink-secondary: #475569;
  --c-ink-tertiary: #64748B;
  --c-ink-faint: #94A3B8;

  --c-ground: #F8FAFC;
  --c-surface: #FFFFFF;
  --c-surface-warm: #F1F5F9;

  --c-border: #E2E8F0;
  --c-border-light: #F1F5F9;

  --c-error: #DC2626;
  --c-success: #16A34A;
  --c-warning: #D97706;
  --c-info: #2563EB;

  /* Category colors */
  --cat-impuestos: #DC2626;
  --cat-impuestos-bg: #FEF2F2;
  --cat-plataformas: #7C3AED;
  --cat-plataformas-bg: #F5F3FF;
  --cat-nomina: #2563EB;
  --cat-nomina-bg: #EFF6FF;
  --cat-imss: #0891B2;
  --cat-imss-bg: #ECFEFF;
  --cat-credito: #D97706;
  --cat-credito-bg: #FFFBEB;
  --cat-herramientas: #475569;
  --cat-herramientas-bg: #F8FAFC;

  /* Typography */
  --f-heading: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --f-body: 'Inter', system-ui, -apple-system, sans-serif;
  --f-mono: 'JetBrains Mono', ui-monospace, monospace;

  --t-xs: 0.75rem;
  --t-sm: 0.8125rem;
  --t-base: 0.9375rem;
  --t-lg: 1.0625rem;
  --t-xl: 1.25rem;
  --t-2xl: 1.5rem;
  --t-3xl: 1.875rem;
  --t-4xl: clamp(2rem, 4vw, 2.75rem);
  --t-5xl: clamp(2.5rem, 5vw, 3.5rem);

  /* Spacing */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.25rem;
  --s-6: 1.5rem;
  --s-8: 2rem;
  --s-10: 2.5rem;
  --s-12: 3rem;
  --s-16: 4rem;
  --s-20: 5rem;
  --s-24: 6rem;

  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-2xl: 20px;
  --r-full: 9999px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.03);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.05), 0 4px 6px rgba(0,0,0,0.03);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.06), 0 8px 10px rgba(0,0,0,0.03);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 150ms;
  --dur-base: 200ms;

  --max-page: 1140px;
}

/* --- Base --- */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--f-body);
  font-size: var(--t-base);
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-ground);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
a:hover { color: var(--c-primary-hover); }

img { max-width: 100%; display: block; }

/* --- Layout --- */
.container {
  max-width: var(--max-page);
  margin: 0 auto;
  padding: 0 var(--s-5);
}

/* --- Navigation --- */
.nav {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-logo {
  font-family: var(--f-heading);
  font-size: var(--t-xl);
  font-weight: 700;
  color: var(--c-ink);
  display: flex;
  align-items: center;
  gap: var(--s-2);
}

.nav-logo svg {
  width: 28px;
  height: 28px;
  color: var(--c-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.nav-links a {
  font-size: var(--t-sm);
  font-weight: 500;
  color: var(--c-ink-secondary);
  padding: var(--s-2) var(--s-3);
  border-radius: var(--r-md);
  white-space: nowrap;
  transition: all var(--dur-fast) var(--ease-out);
}

.nav-links a:hover {
  color: var(--c-primary);
  background: var(--c-primary-50);
}

.nav-cta {
  font-size: var(--t-sm) !important;
  font-weight: 600 !important;
  color: var(--c-surface) !important;
  background: var(--c-primary) !important;
  padding: var(--s-2) var(--s-4) !important;
  border-radius: var(--r-full) !important;
}

.nav-cta:hover {
  background: var(--c-primary-hover) !important;
  color: var(--c-surface) !important;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--s-2);
  cursor: pointer;
  color: var(--c-ink);
}

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, var(--c-primary-50) 0%, var(--c-surface) 50%, #ECFEFF 100%);
  padding: var(--s-16) 0 var(--s-12);
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  background: var(--c-primary-100);
  color: var(--c-primary-800);
  font-size: var(--t-sm);
  font-weight: 600;
  padding: var(--s-1) var(--s-4);
  border-radius: var(--r-full);
  margin-bottom: var(--s-6);
}

.hero h1 {
  font-family: var(--f-heading);
  font-size: var(--t-5xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-ink);
  max-width: 720px;
  margin: 0 auto var(--s-5);
}

.hero h1 span {
  color: var(--c-primary);
}

.hero-sub {
  font-size: var(--t-lg);
  color: var(--c-ink-secondary);
  max-width: 560px;
  margin: 0 auto var(--s-8);
  line-height: 1.7;
}

.hero-search {
  max-width: 520px;
  margin: 0 auto;
  position: relative;
}

.hero-search input {
  width: 100%;
  padding: var(--s-4) var(--s-5);
  padding-left: 48px;
  font-family: var(--f-body);
  font-size: var(--t-base);
  border: 2px solid var(--c-border);
  border-radius: var(--r-xl);
  background: var(--c-surface);
  box-shadow: var(--shadow-lg);
  outline: none;
  transition: border-color var(--dur-fast) var(--ease-out);
}

.hero-search input:focus {
  border-color: var(--c-primary);
}

.hero-search input::placeholder {
  color: var(--c-ink-faint);
}

.hero-search svg {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--c-ink-faint);
}

/* --- Live Indicators --- */
.indicators {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: var(--s-3) 0;
  overflow-x: auto;
}

.indicators-inner {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  min-width: max-content;
}

.indicator {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--t-sm);
  white-space: nowrap;
}

.indicator-label {
  color: var(--c-ink-tertiary);
  font-weight: 500;
}

.indicator-value {
  color: var(--c-ink);
  font-weight: 600;
  font-family: var(--f-mono);
  font-size: var(--t-xs);
}

.indicator-change {
  font-size: var(--t-xs);
  font-weight: 600;
  padding: 1px 6px;
  border-radius: var(--r-sm);
}

.indicator-change.up {
  color: var(--c-success);
  background: #F0FDF4;
}

.indicator-change.down {
  color: var(--c-error);
  background: #FEF2F2;
}

/* --- Section --- */
.section {
  padding: var(--s-12) 0;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--s-6);
}

.section-title {
  font-family: var(--f-heading);
  font-size: var(--t-2xl);
  font-weight: 700;
  color: var(--c-ink);
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.section-title .cat-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--r-full);
  flex-shrink: 0;
}

.section-link {
  font-size: var(--t-sm);
  font-weight: 600;
  color: var(--c-primary);
  display: flex;
  align-items: center;
  gap: var(--s-1);
}

.section-link:hover { text-decoration: underline; }

/* --- Calculator Cards --- */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--s-4);
}

.calc-grid--featured {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.calc-card {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  padding: var(--s-4) var(--s-5);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  text-decoration: none;
  color: var(--c-ink);
  transition: all var(--dur-base) var(--ease-out);
  cursor: pointer;
}

.calc-card:hover {
  border-color: var(--c-primary-200);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: var(--c-ink);
}

.calc-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
}

.calc-card-icon svg {
  width: 20px;
  height: 20px;
}

.calc-card-body {
  flex: 1;
  min-width: 0;
}

.calc-card-title {
  font-weight: 600;
  font-size: var(--t-base);
  line-height: 1.3;
  margin-bottom: 2px;
}

.calc-card-desc {
  font-size: var(--t-xs);
  color: var(--c-ink-tertiary);
  line-height: 1.4;
}

.calc-card-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 6px;
  border-radius: var(--r-sm);
  background: var(--c-primary-100);
  color: var(--c-primary-800);
  white-space: nowrap;
}

/* Featured card (bigger) */
.calc-card--featured {
  padding: var(--s-5) var(--s-6);
}

.calc-card--featured .calc-card-icon {
  width: 48px;
  height: 48px;
}

.calc-card--featured .calc-card-title {
  font-size: var(--t-lg);
}

.calc-card--featured .calc-card-desc {
  font-size: var(--t-sm);
}

/* Category-colored icons */
.icon-impuestos { background: var(--cat-impuestos-bg); color: var(--cat-impuestos); }
.icon-plataformas { background: var(--cat-plataformas-bg); color: var(--cat-plataformas); }
.icon-nomina { background: var(--cat-nomina-bg); color: var(--cat-nomina); }
.icon-imss { background: var(--cat-imss-bg); color: var(--cat-imss); }
.icon-credito { background: var(--cat-credito-bg); color: var(--cat-credito); }
.icon-herramientas { background: var(--cat-herramientas-bg); color: var(--cat-herramientas); }

/* --- Segments Section --- */
.segments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--s-4);
}

.segment-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-6) var(--s-4);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  text-decoration: none;
  color: var(--c-ink);
  text-align: center;
  transition: all var(--dur-base) var(--ease-out);
}

.segment-card:hover {
  border-color: var(--c-primary-200);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--c-ink);
}

.segment-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--r-lg);
  background: var(--c-primary-50);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.segment-icon svg {
  width: 24px;
  height: 24px;
}

.segment-card strong {
  font-size: var(--t-sm);
  font-weight: 600;
}

.segment-card span {
  font-size: var(--t-xs);
  color: var(--c-ink-tertiary);
  line-height: 1.4;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--c-primary-800) 0%, var(--c-primary-900) 100%);
  border-radius: var(--r-xl);
  padding: var(--s-10) var(--s-8);
  text-align: center;
  color: var(--c-surface);
  margin: var(--s-8) 0;
}

.cta-banner h2 {
  font-family: var(--f-heading);
  font-size: var(--t-3xl);
  font-weight: 700;
  margin-bottom: var(--s-3);
}

.cta-banner p {
  font-size: var(--t-lg);
  opacity: 0.85;
  max-width: 480px;
  margin: 0 auto var(--s-6);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  background: var(--c-surface);
  color: var(--c-primary-800);
  font-family: var(--f-body);
  font-size: var(--t-base);
  font-weight: 600;
  padding: var(--s-3) var(--s-6);
  border-radius: var(--r-full);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--dur-fast) var(--ease-out);
}

.cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
  color: var(--c-primary-800);
}

/* --- Footer --- */
.footer {
  background: var(--c-ink);
  color: #CBD5E1;
  padding: var(--s-12) 0 var(--s-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--s-8);
  margin-bottom: var(--s-10);
}

.footer-col h4 {
  font-family: var(--f-heading);
  font-size: var(--t-sm);
  font-weight: 700;
  color: var(--c-surface);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--s-4);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.footer-col a {
  font-size: var(--t-sm);
  color: #94A3B8;
  transition: color var(--dur-fast);
}

.footer-col a:hover {
  color: var(--c-surface);
}

.footer-bottom {
  border-top: 1px solid #1E293B;
  padding-top: var(--s-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-4);
}

.footer-bottom p {
  font-size: var(--t-xs);
  color: #64748B;
}

.footer-disclaimer {
  font-size: var(--t-xs);
  color: #64748B;
  line-height: 1.5;
  max-width: 720px;
  margin: var(--s-6) auto 0;
  text-align: center;
  padding-top: var(--s-6);
  border-top: 1px solid #1E293B;
}

/* --- Search Results Dropdown --- */
.search-results {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-xl);
  max-height: 320px;
  overflow-y: auto;
  display: none;
  z-index: 50;
}

.search-results.active { display: block; }

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-4);
  font-size: var(--t-sm);
  color: var(--c-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--c-border-light);
  transition: background var(--dur-fast);
}

.search-result-item:hover {
  background: var(--c-primary-50);
  color: var(--c-ink);
}

.search-result-item:last-child { border-bottom: none; }

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    padding: var(--s-4);
    box-shadow: var(--shadow-lg);
  }

  .hero {
    padding: var(--s-10) 0 var(--s-8);
  }

  .hero h1 {
    font-size: var(--t-3xl);
  }

  .calc-grid {
    grid-template-columns: 1fr;
  }

  .calc-grid--featured {
    grid-template-columns: 1fr 1fr;
  }

  .segments-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--s-2);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .calc-grid--featured {
    grid-template-columns: 1fr;
  }

  .segments-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .indicators-inner {
    gap: var(--s-4);
  }

  .cta-banner {
    padding: var(--s-8) var(--s-5);
  }
}