/* Google Sheets Argento — GitHub Pages */

:root {
  --bg: #f4f1ea;
  --bg-elevated: #fffcf7;
  --bg-muted: #eae4d8;
  --ink: #152033;
  --ink-muted: #4a5568;
  --border: #d5cdbf;
  --accent: #0b3d91;
  --accent-soft: #74acdf;
  --accent-wash: rgba(116, 172, 223, 0.18);
  --money: #1a6b45;
  --money-wash: rgba(26, 107, 69, 0.1);
  --danger: #9b2c2c;
  --shadow: 0 1px 2px rgba(21, 32, 51, 0.06), 0 8px 24px rgba(21, 32, 51, 0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --max: 920px;
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "Cascadia Code", "Consolas", "Liberation Mono", ui-monospace, monospace;
  --nav-h: 60px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1419;
    --bg-elevated: #1a222d;
    --bg-muted: #243040;
    --ink: #eef2f7;
    --ink-muted: #a0aec0;
    --border: #2f3b4d;
    --accent: #74acdf;
    --accent-soft: #4a8fc4;
    --accent-wash: rgba(116, 172, 223, 0.12);
    --money: #4ade80;
    --money-wash: rgba(74, 222, 128, 0.1);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* Subtle grid texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.4;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration-thickness: 2px;
}

/* ——— Layout ——— */

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.section {
  padding: 3.5rem 0;
}

.section + .section {
  border-top: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-lead {
  margin: 0 0 1.75rem;
  color: var(--ink-muted);
  max-width: 52ch;
}

/* ——— Nav ——— */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.brand img {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: block;
  padding: 0.4rem 0.65rem;
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 6px;
}

.nav-links a:hover,
.nav-links a[aria-current="true"],
.nav-links a[aria-current="page"] {
  color: var(--ink);
  background: var(--accent-wash);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--ink);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.65rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem;
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 1rem;
  }
}

/* ——— Hero ——— */

.hero {
  padding: 3.5rem 0 4rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--accent-wash);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}

.hero h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(2.1rem, 5.5vw, 3rem);
  letter-spacing: -0.035em;
  line-height: 1.1;
  max-width: 16ch;
}

.hero-sub {
  margin: 0 0 1.75rem;
  font-size: 1.15rem;
  color: var(--ink-muted);
  max-width: 42ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.15rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

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

@media (prefers-color-scheme: dark) {
  .btn-primary {
    color: #0f1419;
  }
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--ink);
  border-color: var(--border);
  box-shadow: var(--shadow);
}

.btn-secondary:hover {
  border-color: var(--accent-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  color: var(--ink);
  background: var(--accent-wash);
}

.hero-demo {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-demo-bar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.4rem;
  padding: 0.65rem 1rem;
  background: var(--bg-muted);
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--ink-muted);
  font-weight: 500;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--border);
}

.dot:nth-child(1) { background: #e85d5d; }
.dot:nth-child(2) { background: #e8c45d; }
.dot:nth-child(3) { background: #5dc46e; }

.sheet-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.sheet-table th,
.sheet-table td {
  padding: 0.65rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.sheet-table th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  font-weight: 600;
  background: color-mix(in srgb, var(--bg-muted) 50%, transparent);
}

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

.sheet-table .cell-formula {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--money);
}

.sheet-table .cell-value {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  min-width: 5.5rem;
}

.sheet-table .cell-value.is-error {
  color: var(--ink-muted);
  font-weight: 500;
}

.cell-skeleton {
  display: inline-block;
  width: 4.5rem;
  height: 0.95em;
  border-radius: 4px;
  vertical-align: middle;
  background: linear-gradient(
    90deg,
    var(--bg-muted) 0%,
    color-mix(in srgb, var(--bg-elevated) 70%, var(--bg-muted)) 50%,
    var(--bg-muted) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.2s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .cell-skeleton {
    animation: none;
  }
}

@keyframes skeleton-shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

.hero-demo-title {
  flex: 1;
  min-width: 0;
}

.hero-demo-live {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--money);
  background: var(--money-wash);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}

.hero-demo-error {
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.sheet-table .cell-label {
  color: var(--ink-muted);
  font-size: 0.85rem;
}

/* ——— Cards grid ——— */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0 0 0.85rem;
  color: var(--ink-muted);
  font-size: 0.92rem;
}

.card code,
.inline-code {
  font-family: var(--mono);
  font-size: 0.82em;
  background: var(--money-wash);
  color: var(--money);
  padding: 0.12em 0.4em;
  border-radius: 4px;
}

/* ——— Steps ——— */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow);
}

.steps li::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

@media (prefers-color-scheme: dark) {
  .steps li::before {
    color: #0f1419;
  }
}

.steps h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.steps p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.steps .step-actions {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.callout {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--accent-wash);
  font-size: 0.95rem;
}

.callout strong {
  display: block;
  margin-bottom: 0.25rem;
}

.callout ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--ink-muted);
}

/* ——— Code blocks ——— */

.code-block {
  position: relative;
  margin: 0.75rem 0 0;
  background: #152033;
  color: #e8edf5;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  .code-block {
    background: #0a0e14;
    border: 1px solid var(--border);
  }
}

.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.5;
}

.code-block .copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.3rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: inherit;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: #c5d0e0;
  cursor: pointer;
}

.code-block .copy-btn:hover,
.code-block .copy-btn.copied {
  background: rgba(116, 172, 223, 0.25);
  color: #fff;
}

/* ——— Tables ——— */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

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

.data-table th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  background: var(--bg-muted);
  white-space: nowrap;
}

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

.data-table code {
  font-family: var(--mono);
  font-size: 0.84em;
  white-space: nowrap;
}

.data-table .fn-name {
  font-weight: 600;
}

/* ——— Catalog ——— */

.catalog-group {
  margin-bottom: 2rem;
}

.catalog-group:last-child {
  margin-bottom: 0;
}

.catalog-group h3 {
  margin: 0 0 0.85rem;
  font-size: 1.1rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.catalog-group h3::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.catalog-list {
  display: grid;
  gap: 0.65rem;
}

.catalog-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.25rem;
  padding: 0.9rem 1.1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

@media (min-width: 640px) {
  .catalog-item {
    grid-template-columns: minmax(140px, 180px) 1fr auto;
    align-items: center;
    gap: 1rem;
  }
}

.catalog-item a {
  font-weight: 700;
  text-decoration: none;
  color: var(--accent);
}

.catalog-item a:hover {
  text-decoration: underline;
}

.catalog-item .desc {
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.catalog-item .example {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--money);
  background: var(--money-wash);
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  justify-self: start;
}

/* ——— FAQ ——— */

.faq {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.faq details {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0;
  box-shadow: var(--shadow);
}

.faq summary {
  cursor: pointer;
  padding: 0.85rem 1.1rem;
  font-weight: 600;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::before {
  content: "+";
  display: inline-block;
  width: 1.2em;
  color: var(--accent);
  font-weight: 700;
}

.faq details[open] summary::before {
  content: "−";
}

.faq details p {
  margin: 0;
  padding: 0 1.1rem 1rem 2.3rem;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

/* ——— Sources disclaimer ——— */

.disclaimer {
  margin-top: 1.25rem;
  font-size: 0.88rem;
  color: var(--ink-muted);
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--accent-soft);
  background: var(--bg-elevated);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ——— Changelog page ——— */

.page-hero {
  padding: 2.75rem 0 0.5rem;
}

.page-kicker {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 5vw, 2.6rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.page-hero-lead {
  margin-bottom: 0;
  max-width: 58ch;
}

.page-hero-lead a {
  color: var(--accent);
}

.changelog-section {
  padding-top: 2rem;
}

.changelog-day {
  position: relative;
  padding-left: 1.35rem;
  margin-bottom: 2.5rem;
  border-left: 2px solid var(--border);
}

.changelog-day:last-of-type {
  margin-bottom: 1.5rem;
}

.changelog-day::before {
  content: "";
  position: absolute;
  left: -0.4rem;
  top: 0.45rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 40%, transparent);
}

.changelog-day h2 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.changelog-day h2 time {
  font-variant-numeric: tabular-nums;
}

.changelog-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.changelog-list > li {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.9rem 1.05rem;
}

.changelog-list > li p {
  margin: 0.45rem 0 0;
  font-size: 0.98rem;
  color: var(--ink);
}

.changelog-list > li code {
  font-family: var(--mono);
  font-size: 0.86em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--bg-muted);
}

.changelog-item-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.55rem;
}

.cl-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.12rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid transparent;
}

.cl-tag-nuevo {
  background: var(--money-wash);
  color: var(--money);
  border-color: color-mix(in srgb, var(--money) 28%, transparent);
}

.cl-tag-mejora {
  background: var(--accent-wash);
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 28%, transparent);
}

.cl-tag-fix {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 28%, transparent);
}

.cl-tag-datos {
  background: color-mix(in srgb, #7c3aed 12%, transparent);
  color: #6d28d9;
  border-color: color-mix(in srgb, #7c3aed 28%, transparent);
}

.cl-tag-sitio {
  background: color-mix(in srgb, #0e7490 12%, transparent);
  color: #0e7490;
  border-color: color-mix(in srgb, #0e7490 28%, transparent);
}

.cl-tag-docs {
  background: var(--bg-muted);
  color: var(--ink-muted);
  border-color: var(--border);
}

@media (prefers-color-scheme: dark) {
  .cl-tag-datos {
    color: #c4b5fd;
  }

  .cl-tag-sitio {
    color: #67e8f9;
  }
}

.changelog-pr {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-muted);
  text-decoration: none;
}

.changelog-pr:hover {
  color: var(--accent);
  text-decoration: underline;
}

.changelog-footnote {
  margin: 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--ink-muted);
}

.changelog-footnote a {
  color: var(--accent);
}

/* ——— Footer ——— */

.site-footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--border);
  background: var(--bg-muted);
}

.site-footer .wrap {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-brand {
  font-weight: 700;
  font-size: 1.05rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.footer-note {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

/* ——— Utilities ——— */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }