/* ==========================================================================
   Criptomoneda.com.es — Design System (Coinbase Spain Style Reference)
   ========================================================================== */

:root {
  /* Colors */
  --color-coinbase-blue: #0052ff;
  --color-interactive-blue: #578bfa;
  --color-pure-white: #ffffff;
  --color-midnight: #0a0b0d;
  --color-slate: #5b616e;
  --color-ash: #8a919e;
  --color-frost: #f7f8f9;
  --color-cloud: #eef0f3;
  --color-pewter: #dedfe2;
  --color-charcoal: #141519;
  --color-positive-green: #27ad75;
  --color-negative-red: #f0616d;

  /* Typography */
  --font-display: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Scale */
  --text-caption: 13px;
  --text-body: 16px;
  --text-subheading: 18px;
  --text-heading-sm: 24px;
  --text-heading-md: 32px;
  --text-heading: 44px;
  --text-heading-lg: 56px;

  /* Spacing */
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-48: 48px;
  --spacing-64: 64px;
  --spacing-80: 80px;

  /* Border Radii */
  --radius-tags: 100000px;
  --radius-cards: 24px;
  --radius-inputs: 8px;
  --radius-buttons: 56px;

  /* Layout */
  --page-max-width: 1200px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-midnight);
  background-color: var(--color-pure-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

/* Typography Utility */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-midnight);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(32px, 5vw, var(--text-heading-lg));
  line-height: 1.05;
}

h2 {
  font-size: clamp(26px, 3.5vw, var(--text-heading));
  line-height: 1.1;
}

h3 {
  font-size: clamp(20px, 2.5vw, var(--text-heading-md));
}

p {
  color: var(--color-slate);
  font-size: var(--text-body);
  line-height: 1.6;
}

.text-subheading {
  font-size: var(--text-subheading);
  line-height: 1.56;
}

.text-positive {
  color: var(--color-positive-green) !important;
}

.text-negative {
  color: var(--color-negative-red) !important;
}

.font-semibold {
  font-weight: 600;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--page-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-24);
  padding-right: var(--spacing-24);
}

/* Top Ticker Bar */
.top-ticker {
  background-color: var(--color-frost);
  border-bottom: 1px solid var(--color-pewter);
  padding: 8px 0;
  font-size: var(--text-caption);
  color: var(--color-slate);
}

.top-ticker-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-16);
  overflow-x: auto;
  white-space: nowrap;
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.ticker-item strong {
  color: var(--color-midnight);
}

/* Header & Navigation */
.header-main {
  background-color: var(--color-pure-white);
  border-bottom: 1px solid var(--color-pewter);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  color: var(--color-midnight);
  letter-spacing: -0.03em;
}

.brand-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-coinbase-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-pure-white);
  font-weight: 800;
  font-size: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-32);
  list-style: none;
}

.nav-link {
  font-size: var(--text-body);
  font-weight: 600;
  color: var(--color-midnight);
  transition: color 0.15s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-coinbase-blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--color-coinbase-blue);
  color: var(--color-pure-white);
  padding: 14px 28px;
  font-size: var(--text-body);
  font-weight: 600;
  border-radius: var(--radius-buttons);
  border: none;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
  text-align: center;
}

.btn-primary:hover {
  background-color: #0045d8;
  color: var(--color-pure-white);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--color-cloud);
  color: var(--color-midnight);
  padding: 14px 28px;
  font-size: var(--text-body);
  font-weight: 600;
  border-radius: var(--radius-buttons);
  border: none;
  cursor: pointer;
  transition: background-color 0.15s ease;
  text-align: center;
}

.btn-secondary:hover {
  background-color: #e2e5ea;
}

.btn-white {
  background-color: var(--color-pure-white);
  color: var(--color-midnight);
}

.btn-white:hover {
  background-color: var(--color-frost);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

.link-interactive {
  color: var(--color-coinbase-blue);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

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

/* Tags and Badges */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: var(--text-caption);
  font-weight: 600;
  border-radius: var(--radius-tags);
  background-color: var(--color-cloud);
  color: var(--color-slate);
}

.tag-blue {
  background-color: #ebf2ff;
  color: var(--color-coinbase-blue);
}

.tag-green {
  background-color: #e8f7f0;
  color: var(--color-positive-green);
}

.tag-red {
  background-color: #fdeced;
  color: var(--color-negative-red);
}

.tag-gold {
  background-color: #fff8e6;
  color: #b7791f;
}

/* Sections & Color Blocking */
.section {
  padding: var(--spacing-64) 0;
}

.section-lg {
  padding: var(--spacing-80) 0;
}

.section-dark {
  background-color: var(--color-midnight);
  color: var(--color-pure-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-pure-white);
}

.section-dark p {
  color: #a0a6b2;
}

.section-frost {
  background-color: var(--color-frost);
  border-top: 1px solid var(--color-pewter);
  border-bottom: 1px solid var(--color-pewter);
}

/* Hero Component */
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-48);
  align-items: center;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-24);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  margin-top: 8px;
}

.hero-card {
  background-color: var(--color-frost);
  border: 1px solid var(--color-pewter);
  border-radius: var(--radius-cards);
  padding: var(--spacing-32);
}

/* Cards (Strictly No Shadows) */
.card {
  background-color: var(--color-pure-white);
  border: 1px solid var(--color-pewter);
  border-radius: var(--radius-cards);
  padding: var(--spacing-24);
  transition: border-color 0.2s ease;
}

.card:hover {
  border-color: var(--color-coinbase-blue);
}

.card-dark {
  background-color: var(--color-charcoal);
  border: 1px solid #2b2f38;
  border-radius: var(--radius-cards);
  padding: var(--spacing-24);
}

.card-dark:hover {
  border-color: var(--color-interactive-blue);
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-24);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-24);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-24);
}

/* Data Tables */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-pewter);
  border-radius: var(--radius-cards);
  background-color: var(--color-pure-white);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  padding: 16px 20px;
  background-color: var(--color-frost);
  border-bottom: 1px solid var(--color-pewter);
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-slate);
}

.data-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-pewter);
  font-size: var(--text-body);
  color: var(--color-midnight);
  vertical-align: middle;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: #fafbfc;
}

/* Form Inputs & Interactive Sliders */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: var(--spacing-16);
}

.form-label {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-midnight);
}

.form-input, .form-select {
  padding: 14px 16px;
  border-radius: var(--radius-inputs);
  border: 1px solid var(--color-pewter);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  color: var(--color-midnight);
  background-color: var(--color-pure-white);
  outline: none;
  transition: border-color 0.15s ease;
}

.form-input:focus, .form-select:focus {
  border-color: var(--color-coinbase-blue);
  box-shadow: 0 0 0 2px rgba(0, 82, 255, 0.15);
}

.range-slider {
  width: 100%;
  accent-color: var(--color-coinbase-blue);
  height: 6px;
  cursor: pointer;
}

/* CNMV Legal Disclaimer (Mandatory) */
.cnmv-banner {
  background-color: #fff9e6;
  border: 1px solid #ffe08a;
  border-radius: 12px;
  padding: 16px 20px;
  margin: var(--spacing-24) 0;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.cnmv-icon {
  flex-shrink: 0;
  font-size: 20px;
}

.cnmv-text {
  font-size: var(--text-caption);
  color: #7a5400;
  line-height: 1.5;
}

.cnmv-text strong {
  color: #5c3e00;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-caption);
  color: var(--color-ash);
  margin-bottom: var(--spacing-24);
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--color-slate);
}

.breadcrumbs a:hover {
  color: var(--color-coinbase-blue);
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
  margin-top: var(--spacing-32);
}

.faq-item {
  border: 1px solid var(--color-pewter);
  border-radius: var(--radius-cards);
  background-color: var(--color-pure-white);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-midnight);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 24px 20px 24px;
  color: var(--color-slate);
  font-size: var(--text-body);
  line-height: 1.6;
}

/* Footer */
.footer-main {
  background-color: var(--color-frost);
  border-top: 1px solid var(--color-pewter);
  padding: var(--spacing-64) 0 var(--spacing-32) 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-48);
  margin-bottom: var(--spacing-48);
}

.footer-col h4 {
  font-size: 16px;
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--color-midnight);
  margin-bottom: var(--spacing-16);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 15px;
  color: var(--color-slate);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-pewter);
  padding-top: var(--spacing-24);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  font-size: var(--text-caption);
  color: var(--color-slate);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-32);
  }
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-32);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--color-pure-white);
    border-bottom: 1px solid var(--color-pewter);
    padding: var(--spacing-24);
    gap: var(--spacing-16);
  }
  .mobile-menu-btn {
    display: block;
  }
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .section {
    padding: var(--spacing-48) 0;
  }
}