/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #0a0f0d;
  --bg-elev: #101613;
  --card: #131a17;
  --card-hover: #17201c;
  --border: #232e28;
  --border-strong: #2e3b34;
  --text: #eef3f0;
  --text-dim: #9fb0a8;
  --text-faint: #6c7d75;

  --accent: #22c55e;
  --accent-strong: #16a34a;
  --accent-soft: rgba(34, 197, 94, 0.14);
  --accent-border: rgba(34, 197, 94, 0.35);

  --danger: #f2555a;
  --danger-soft: rgba(242, 85, 90, 0.14);
  --danger-border: rgba(242, 85, 90, 0.35);

  --warn: #f5a623;
  --warn-soft: rgba(245, 166, 35, 0.14);

  --neutral-soft: rgba(159, 176, 168, 0.12);

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --display: "Manrope", var(--sans);
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 8px 24px rgba(0, 0, 0, 0.28);
  --container: 1160px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f9f7;
    --bg-elev: #ffffff;
    --card: #ffffff;
    --card-hover: #f2f7f4;
    --border: #e2e9e4;
    --border-strong: #cdd9d1;
    --text: #101915;
    --text-dim: #4d5c54;
    --text-faint: #7c8a82;

    --accent: #16a34a;
    --accent-strong: #128a3e;
    --accent-soft: rgba(22, 163, 74, 0.10);
    --accent-border: rgba(22, 163, 74, 0.3);

    --danger: #d6323a;
    --danger-soft: rgba(214, 50, 58, 0.10);
    --danger-border: rgba(214, 50, 58, 0.3);

    --warn: #b3720c;
    --warn-soft: rgba(179, 114, 12, 0.10);

    --neutral-soft: rgba(77, 92, 84, 0.08);
    --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.6) inset, 0 8px 24px rgba(16, 25, 21, 0.06);
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { font-family: var(--display); text-wrap: balance; line-height: 1.12; letter-spacing: -0.02em; font-weight: 700; }
ul { list-style: none; padding: 0; }
table { border-collapse: collapse; width: 100%; }
::selection { background: var(--accent-soft); color: var(--text); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--accent); color: #06180c;
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: var(--container); margin-inline: auto; padding-inline: 1.25rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.is-positive { color: var(--accent); }
.is-negative { color: var(--danger); }
.is-neutral { color: var(--text-dim); }
.text-dim { color: var(--text-dim); }
.text-faint { color: var(--text-faint); }
.section { padding-block: clamp(2.5rem, 6vw, 5rem); }
.section-head { max-width: 640px; margin-bottom: 2rem; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: .5rem; }
.section-head p { color: var(--text-dim); font-size: 1.02rem; }
.stack { display: flex; flex-direction: column; gap: 1rem; }
.mt-1 { margin-top: .5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }

/* =============================================================
   4. Buttons & badges
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .85rem 1.4rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem;
  transition: transform .15s var(--ease-out), background-color .15s var(--ease-out), border-color .15s var(--ease-out);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #06180c; }
.btn-primary:hover { background: var(--accent-strong); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--card-hover); border-color: var(--accent-border); }
.btn-ghost { background: transparent; color: var(--text-dim); }
.btn-ghost:hover { color: var(--text); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

.badge {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .3rem .7rem; border-radius: 999px; font-size: .78rem; font-weight: 600;
  background: var(--neutral-soft); color: var(--text-dim); border: 1px solid var(--border);
}
.badge-accent { background: var(--accent-soft); color: var(--accent); border-color: var(--accent-border); }
.badge-warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }

/* =============================================================
   5. Header / nav
   ============================================================= */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 97%, transparent);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: inline-flex; align-items: center; gap: .15rem; font-family: var(--display); font-size: 1.3rem; font-weight: 800; }
.brand-mark { width: 26px; height: 26px; flex: none; }
.brand-strike { color: var(--text); }
.brand-verde { color: var(--accent); }

.nav-desktop { display: none; }
.nav-desktop ul { display: flex; align-items: center; gap: 1.9rem; }
.nav-desktop a, .nav-desktop button.nav-link {
  font-size: .93rem; font-weight: 600; color: var(--text-dim);
  transition: color .15s var(--ease-out);
}
.nav-desktop a:hover, .nav-desktop .nav-dropdown:hover > button { color: var(--text); }

.nav-dropdown { position: relative; }
.nav-dropdown > button { display: inline-flex; align-items: center; gap: .3rem; }
.nav-dropdown-panel {
  position: absolute; top: calc(100% + .8rem); left: 50%; transform: translateX(-50%);
  min-width: 240px; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-md); box-shadow: var(--shadow-card);
  padding: .5rem; opacity: 0; visibility: hidden; translate: 0 6px;
  transition: opacity .15s var(--ease-out), translate .15s var(--ease-out), visibility .15s;
}
.nav-dropdown:hover .nav-dropdown-panel,
.nav-dropdown:focus-within .nav-dropdown-panel {
  opacity: 1; visibility: visible; translate: 0 0;
}
.nav-dropdown-panel a {
  display: block; padding: .6rem .75rem; border-radius: var(--radius-sm);
  font-size: .9rem; color: var(--text);
}
.nav-dropdown-panel a:hover { background: var(--card-hover); }

.header-actions { display: flex; align-items: center; gap: .6rem; }

@media (max-width: 480px) {
  .site-header .container { padding-inline: .85rem; }
  .header-actions { gap: .35rem; }
  .lang-btn { padding: .4rem .55rem; font-size: .76rem; }
  .header-account-btn { padding: .4rem .6rem !important; font-size: .82rem; }
  .nav-toggle { padding: .4rem; }
}
.lang-btn {
  font-family: var(--mono); font-size: .82rem; font-weight: 700;
  padding: .45rem .7rem; border-radius: var(--radius-sm); border: 1px solid var(--border-strong);
  color: var(--text);
}
.lang-btn:hover { border-color: var(--accent-border); color: var(--accent); }

.nav-toggle {
  display: inline-flex; flex-direction: column; gap: 4px; padding: .5rem;
}
.nav-toggle span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; }

.nav-mobile {
  display: none; position: fixed; inset: 68px 0 0 0; background: var(--bg);
  z-index: 90; overflow-y: auto; padding: 1.5rem;
}
.nav-mobile.is-open { display: block; }
.nav-mobile ul { display: flex; flex-direction: column; gap: .25rem; }
.nav-mobile a, .nav-mobile .nav-mobile-label {
  display: block; padding: .9rem .25rem; font-size: 1.05rem; font-weight: 600;
  border-bottom: 1px solid var(--border);
}
.nav-mobile-label { color: var(--text-faint); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; border: 0; padding-bottom: .3rem; margin-top: 1rem; }

@media (min-width: 960px) {
  .nav-desktop { display: block; }
  .nav-toggle, .nav-mobile { display: none !important; }
}

/* =============================================================
   6. Hero
   ============================================================= */
.hero { padding-block: clamp(3rem, 8vw, 6rem) clamp(2.5rem, 6vw, 4rem); }
.hero .container { max-width: 900px; text-align: center; }
.hero-tag { margin-bottom: 1.25rem; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); margin-bottom: 1.1rem; }
.hero p { font-size: clamp(1.02rem, 1.6vw, 1.2rem); color: var(--text-dim); max-width: 640px; margin-inline: auto; margin-bottom: 2rem; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; }

/* =============================================================
   7. Cards grid (home)
   ============================================================= */
.tools-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 720px) { .tools-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1280px) { .tools-grid { grid-template-columns: repeat(4, 1fr); } }

.tool-link-card {
  display: flex; flex-direction: column; gap: .7rem;
  padding: 1.5rem; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  transition: border-color .15s var(--ease-out), transform .15s var(--ease-out);
}
.tool-link-card:hover { border-color: var(--accent-border); transform: translateY(-2px); }
.tool-link-card .icon { width: 40px; height: 40px; color: var(--accent); }
.tool-link-card h3 { font-size: 1.12rem; }
.tool-link-card p { color: var(--text-dim); font-size: .92rem; }
.tool-link-card .goto { margin-top: auto; font-size: .85rem; font-weight: 700; color: var(--accent); }

.verbs-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
@media (min-width: 720px) { .verbs-grid { grid-template-columns: repeat(4, 1fr); } }
.verb-card { padding: 1.25rem; border: 1px solid var(--border); border-radius: var(--radius-md); text-align: center; }
.verb-card .verb { font-family: var(--display); font-weight: 800; color: var(--accent); font-size: 1.15rem; margin-bottom: .3rem; }
.verb-card .q { color: var(--text-dim); font-size: .88rem; }

.banner {
  padding: 1.5rem; border-radius: var(--radius-lg); background: var(--accent-soft);
  border: 1px solid var(--accent-border); display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; justify-content: space-between;
}
.banner h3 { font-size: 1.05rem; margin-bottom: .25rem; }
.banner p { color: var(--text-dim); font-size: .92rem; max-width: 460px; }

/* =============================================================
   8. Page head (calculator pages)
   ============================================================= */
.page-head { padding-block: clamp(2rem, 5vw, 3rem) 1.5rem; }
.page-head h1 { font-size: clamp(1.7rem, 3.6vw, 2.4rem); margin-bottom: .5rem; }
.page-head p { color: var(--text-dim); font-size: 1.02rem; max-width: 640px; }
.breadcrumb { font-size: .85rem; color: var(--text-faint); margin-bottom: 1rem; }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent); }

/* =============================================================
   9. Tool card / forms
   ============================================================= */
.tool-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card); padding: clamp(1.25rem, 3vw, 2rem); margin-bottom: 1.5rem;
}
.tool-card h2 { font-size: 1.2rem; margin-bottom: .3rem; }
.tool-card .card-desc { color: var(--text-dim); font-size: .92rem; margin-bottom: 1.25rem; }

.form-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 640px) { .form-grid.cols-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 720px) { .form-grid.cols-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 720px) { .form-grid.cols-4 { grid-template-columns: repeat(4, 1fr); } }

.field { display: flex; flex-direction: column; gap: .4rem; }
.field label { font-size: .85rem; font-weight: 600; color: var(--text-dim); }
.field .hint { font-size: .78rem; color: var(--text-faint); }
.field input[type="text"],
.field input[type="number"],
.field select {
  background: var(--bg-elev); border: 1px solid var(--border-strong); color: var(--text);
  border-radius: var(--radius-sm); padding: .7rem .85rem; font-size: .98rem; font-family: var(--mono);
  transition: border-color .15s var(--ease-out);
}
.field select { font-family: var(--sans); }
.field input:focus, .field select:focus { border-color: var(--accent); }
.field .equivalence { font-size: .78rem; color: var(--text-faint); }
.field .error-msg { font-size: .78rem; color: var(--danger); min-height: 1em; }

.type-toggle { display: inline-flex; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); overflow: hidden; }
.type-toggle button {
  padding: .7rem 1.1rem; font-weight: 700; font-size: .88rem; color: var(--text-dim);
  transition: background-color .15s var(--ease-out), color .15s var(--ease-out);
}
.type-toggle button.is-active.call { background: var(--accent-soft); color: var(--accent); }
.type-toggle button.is-active.put { background: var(--danger-soft); color: var(--danger); }
.type-toggle button + button { border-left: 1px solid var(--border-strong); }

.form-actions { display: flex; gap: .8rem; margin-top: 1.5rem; flex-wrap: wrap; }

/* =============================================================
   10. Results
   ============================================================= */
.result-panel { margin-top: 1.5rem; }
.result-hero { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 640px) { .result-hero { grid-template-columns: repeat(3, 1fr); } }
.result-tile {
  padding: 1.1rem 1.25rem; border-radius: var(--radius-md); background: var(--bg-elev);
  border: 1px solid var(--border);
}
.result-tile .label { font-size: .78rem; color: var(--text-faint); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; margin-bottom: .35rem; }
.result-tile .value { font-family: var(--mono); font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 700; }
.result-tile.is-hero { grid-column: 1 / -1; text-align: center; padding: 1.5rem; }
.result-tile.is-hero .value { font-size: clamp(2rem, 5vw, 3rem); }

.breakdown { margin-top: 1rem; border-top: 1px solid var(--border); padding-top: 1rem; }
.breakdown-row { display: flex; justify-content: space-between; padding: .5rem 0; font-size: .92rem; border-bottom: 1px dashed var(--border); }
.breakdown-row:last-child { border-bottom: 0; }
.breakdown-row .k { color: var(--text-dim); }
.breakdown-row .v { font-family: var(--mono); font-weight: 600; }

.candle-callout {
  margin-top: 1rem; padding: 1.1rem 1.25rem; border-radius: var(--radius-md);
  background: var(--accent-soft); border: 1px solid var(--accent-border);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.candle-callout.is-negative { background: var(--danger-soft); border-color: var(--danger-border); }
.candle-callout .label { font-weight: 700; font-size: .95rem; }
.candle-callout .value { font-family: var(--mono); font-size: 1.6rem; font-weight: 800; }

/* =============================================================
   11. Tables
   ============================================================= */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-md); }
.data-table { min-width: 100%; }
.data-table th, .data-table td {
  padding: .75rem 1rem; text-align: right; font-size: .9rem; white-space: nowrap;
}
.data-table th:first-child, .data-table td:first-child { text-align: left; }
.data-table thead th {
  background: var(--bg-elev); color: var(--text-faint); font-weight: 600; font-size: .76rem;
  text-transform: uppercase; letter-spacing: .04em; position: sticky; top: 0;
}
.data-table tbody tr { border-top: 1px solid var(--border); }
.data-table td { font-family: var(--mono); }
.data-table tr.is-current { background: var(--accent-soft); }

/* =============================================================
   12. Purchase rows (average price)
   ============================================================= */
.purchase-row {
  display: grid; grid-template-columns: 1fr; gap: .75rem;
  padding: .9rem; border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: .75rem;
  background: var(--bg-elev);
}
.purchase-row .row-label { font-size: .8rem; font-weight: 700; color: var(--text-faint); }
.purchase-row .remove-btn { color: var(--danger); font-size: .85rem; font-weight: 700; padding: .6rem; justify-self: start; }
@media (min-width: 640px) {
  .purchase-row { grid-template-columns: 1fr 1fr 1fr auto; align-items: end; }
  .purchase-row .row-label { grid-column: 1 / -1; }
  .purchase-row .remove-btn { justify-self: auto; }
}

/* =============================================================
   13. Formula disclosure, disclaimers, liquidity badges
   ============================================================= */
details.formula { margin-top: 1.25rem; border-top: 1px solid var(--border); padding-top: 1rem; }
details.formula summary {
  cursor: pointer; font-weight: 600; font-size: .9rem; color: var(--text-dim);
  list-style: none; display: flex; align-items: center; gap: .4rem;
}
details.formula summary::-webkit-details-marker { display: none; }
details.formula summary::before { content: "+"; font-family: var(--mono); color: var(--accent); font-weight: 800; }
details.formula[open] summary::before { content: "−"; }
details.formula p { margin-top: .6rem; color: var(--text-dim); font-size: .88rem; line-height: 1.7; }

.note-box {
  padding: .9rem 1.1rem; border-radius: var(--radius-md); background: var(--neutral-soft);
  border: 1px solid var(--border); font-size: .85rem; color: var(--text-dim); margin-top: 1rem;
}
.note-box.is-warn { background: var(--warn-soft); border-color: transparent; color: var(--warn); }
.note-box.is-danger { background: var(--danger-soft); color: var(--danger); border-color: var(--danger-border); }

/* =============================================================
   14. Placeholder / Pro pages
   ============================================================= */
.pro-panel {
  text-align: center; max-width: 560px; margin-inline: auto; padding: clamp(2rem, 5vw, 3rem);
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg);
}
.pro-panel .badge { margin-bottom: 1rem; }
.pro-panel h2 { font-size: 1.4rem; margin-bottom: .75rem; }
.pro-panel p { color: var(--text-dim); margin-bottom: .5rem; }

/* =============================================================
   14b. Ad slots (AdSense placeholders — empty until activated)
   ============================================================= */
.ad-slot {
  min-height: 90px;
  display: flex; align-items: center; justify-content: center;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-faint);
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-block: 1.5rem;
  background: var(--bg-elev);
}

/* =============================================================
   14c. Cookie consent banner
   ============================================================= */
.cookie-banner {
  position: fixed; left: 1rem; right: 1rem; bottom: 1rem; z-index: 200;
  max-width: 640px; margin-inline: auto;
  background: var(--card); border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  padding: 1.1rem 1.25rem;
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
}
.cookie-banner p { font-size: .85rem; color: var(--text-dim); flex: 1 1 260px; }
.cookie-banner-actions { display: flex; gap: .6rem; flex: 0 0 auto; }
.cookie-banner[hidden] { display: none; }

/* =============================================================
   15. Footer
   ============================================================= */
.site-footer { border-top: 1px solid var(--border); padding-block: 2.5rem; margin-top: 3rem; }
.footer-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.5rem; margin-bottom: 1.5rem; }
.footer-brand { font-family: var(--display); font-weight: 800; font-size: 1.1rem; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--text-dim); font-size: .88rem; }
.footer-links a:hover { color: var(--accent); }
.footer-disclaimer { font-size: .78rem; color: var(--text-faint); line-height: 1.7; max-width: 900px; }
.footer-bottom { margin-top: 1.5rem; font-size: .8rem; color: var(--text-faint); display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; }

/* =============================================================
   16. Responsive helpers
   ============================================================= */
@media (min-width: 720px)  { .container { padding-inline: 2rem; } }
@media (min-width: 1280px) { .container { padding-inline: 2.5rem; } }

/* =============================================================
   17. Reduced motion
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .tool-link-card:hover { transform: none; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}