/* =============================================================
   Calculadora IMC — paleta crema / pastel / verde
   ============================================================= */
:root {
  --bg: #f4f6ea;
  --surface: #fffef8;
  --surface-2: #e8edd6;
  --ink: #26301e;
  --ink-soft: #495340;
  --muted: #79846a;
  --border: #dbe0c9;
  --accent: #588a46;
  --accent-soft: #7cae63;
  --accent-ink: #ffffff;
  --ok: #4a8a48;
  --warn: #b07d17;
  --bad: #c25640;
  /* IMC category colors */
  --c-under: #e0b24c;
  --c-normal: #6aa85a;
  --c-over: #e0912f;
  --c-obese: #cf5c46;
  --sans: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 14px;
  --radius-sm: 8px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow: 0 1px 2px rgba(40,50,20,.04), 0 8px 24px rgba(40,50,20,.07);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181c13;
    --surface: #20261a;
    --surface-2: #2a3122;
    --ink: #eef1e2;
    --ink-soft: #cdd3c0;
    --muted: #929c80;
    --border: #363d2b;
    --accent: #8cbf78;
    --accent-soft: #6f9c5a;
    --accent-ink: #16210d;
    --ok: #8cc47c;
    --warn: #d8a94a;
    --bad: #e08066;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.4);
  }
}

/* ---- Reset & base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  background: var(--bg); color: var(--ink); font-family: var(--sans);
  font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased;
  overflow-x: clip; overscroll-behavior-y: none;
}
img, svg, video, canvas { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; line-height: 1.1; letter-spacing: -0.01em; font-weight: 800; }
ul, ol { list-style: none; padding: 0; }
input, select { font: inherit; color: inherit; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.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; }
.skip-link { position: fixed; top: -100px; left: 1rem; z-index: 9999; padding: .6rem 1rem; background: var(--ink); color: var(--bg); border-radius: var(--radius-sm); font-weight: 600; transition: top .25s var(--ease-out); }
.skip-link:focus { top: 1rem; }
.container { width: 100%; max-width: 1080px; margin-inline: auto; padding-inline: 1.25rem; }

/* ---- Header ---- */
.site-header { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.header-row { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 800; font-size: 1.05rem; }
.brand-mark { display: inline-grid; place-items: center; width: 28px; height: 28px; background: var(--accent); color: var(--accent-ink); border-radius: 7px; font-size: 1rem; }
.site-nav { display: none; gap: 1.6rem; font-weight: 600; font-size: .92rem; }
.site-nav a { color: var(--ink-soft); transition: color .2s var(--ease-out); }
.site-nav a:hover { color: var(--ink); }
.nav-toggle { display: grid; place-items: center; width: 36px; height: 36px; font-size: 1.2rem; }
@media (min-width: 720px) { .nav-toggle { display: none; } .site-nav { display: flex; } }
.site-nav.is-open { display: flex; }
@media (max-width: 719px) { .site-nav { position: absolute; top: 62px; left: 0; right: 0; flex-direction: column; background: var(--surface); border-bottom: 1px solid var(--border); padding: 1rem 1.25rem; gap: .9rem; } }

/* ---- Hero ---- */
.hero { padding-block: 2.2rem 1.2rem; text-align: center; }
.hero h1 { font-size: clamp(1.7rem, 4.4vw, 2.6rem); max-width: 22ch; margin-inline: auto; }
.hero-sub { margin-top: .8rem; color: var(--ink-soft); max-width: 58ch; margin-inline: auto; font-size: 1.02rem; }

/* ---- Tool card ---- */
.tool-section { padding-block: 0.6rem 1.6rem; }
.tool-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.25rem; }
@media (min-width: 720px) { .tool-card { padding: 1.75rem; } }
.tool-grid { display: grid; gap: 1.5rem; }
@media (min-width: 820px) { .tool-grid { grid-template-columns: 1fr 1.15fr; align-items: start; } }

.tool-block-title { display: flex; align-items: center; gap: .6rem; font-size: 1.02rem; margin-bottom: 1rem; }
.block-icon { font-size: 1.15rem; }

.segmented { display: inline-flex; background: var(--surface-2); border-radius: 999px; padding: 3px; margin-bottom: 1.1rem; }
.segmented-btn { padding: .5rem 1rem; border-radius: 999px; font-weight: 600; font-size: .86rem; color: var(--muted); transition: all .2s var(--ease-out); }
.segmented-btn.is-active { background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }

.field-group { margin-bottom: 1rem; }
.field-label { display: block; font-size: .84rem; font-weight: 600; color: var(--ink-soft); margin-bottom: .4rem; }
.input-wrap { position: relative; display: flex; align-items: center; }
.field-input { width: 100%; padding: .8rem .95rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg); color: var(--ink); font-size: 1.05rem; transition: border-color .2s var(--ease-out); }
.field-input:focus { border-color: var(--accent); }
.input-unit { position: absolute; right: .9rem; font-size: .9rem; color: var(--muted); font-weight: 600; pointer-events: none; }
.field-row { display: grid; gap: .8rem; }
@media (min-width: 460px) { .field-row-2 { grid-template-columns: 1fr 1fr; } }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; padding: .82rem 1.4rem; border-radius: 999px; font-weight: 700; font-size: .95rem; transition: transform .18s var(--ease-out), opacity .18s var(--ease-out); }
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 40%, transparent); width: 100%; margin-top: .3rem; }
.btn-primary:hover { opacity: .93; }

/* ---- Result ---- */
.result-box { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; text-align: center; min-height: 100%; display: flex; flex-direction: column; justify-content: center; }
.result-empty { color: var(--muted); font-size: .95rem; }
.result-label-top { font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.result-value { font-size: 3.4rem; font-weight: 800; line-height: 1; margin: .3rem 0 .1rem; font-variant-numeric: tabular-nums; }
.result-cat { display: inline-block; font-weight: 700; font-size: 1rem; padding: .3rem .9rem; border-radius: 999px; margin-top: .3rem; color: #fff; }
.result-range { margin-top: 1rem; font-size: .9rem; color: var(--ink-soft); }
.result-range strong { color: var(--ink); }

/* IMC scale */
.imc-scale { margin-top: 1.4rem; }
.scale-bar { position: relative; height: 14px; border-radius: 999px; overflow: visible;
  background: linear-gradient(to right,
    var(--c-under) 0%, var(--c-under) 14%,
    var(--c-normal) 14%, var(--c-normal) 40%,
    var(--c-over) 40%, var(--c-over) 60%,
    var(--c-obese) 60%, var(--c-obese) 100%);
}
.scale-marker { position: absolute; top: 50%; width: 4px; height: 26px; background: var(--ink); border-radius: 3px; transform: translate(-50%, -50%); box-shadow: 0 0 0 3px var(--surface-2); transition: left .3s var(--ease-out); }
.scale-legend { display: flex; justify-content: space-between; margin-top: .6rem; font-size: .68rem; color: var(--muted); font-weight: 600; }
.scale-legend span { flex: 1; text-align: center; }

/* ---- Ad slots ---- */
.ad-slot { display: grid; place-items: center; min-height: 90px; border: 1px dashed var(--border); border-radius: var(--radius-sm); color: var(--muted); font-weight: 700; font-size: .78rem; letter-spacing: .08em; background: color-mix(in srgb, var(--surface-2) 60%, transparent); }
.ad-slot-banner { margin-top: 1.2rem; }
.ad-slot-content { margin-block: 2rem; min-height: 120px; }
.ad-slot-dialog { min-height: 140px; margin-block: .8rem; }
.ad-toast { position: fixed; right: 1rem; bottom: 1rem; z-index: 60; display: flex; align-items: center; gap: .6rem; padding: .7rem 2.1rem .7rem 1rem; background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius-sm); box-shadow: var(--shadow); font-size: .72rem; font-weight: 700; letter-spacing: .08em; color: var(--muted); opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity .3s var(--ease-out), transform .3s var(--ease-out); }
.ad-toast.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.ad-toast-close { position: absolute; top: 4px; right: 4px; width: 20px; height: 20px; display: grid; place-items: center; font-size: .95rem; color: var(--muted); border-radius: 50%; }
.ad-toast-close:hover { background: var(--surface-2); }
.ad-dialog { border: 1px solid var(--border); border-radius: var(--radius); padding: 1.3rem; max-width: 380px; width: calc(100% - 2rem); background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
.ad-dialog::backdrop { background: rgba(20,25,10,.5); backdrop-filter: blur(2px); }
.ad-dialog-label { font-size: .72rem; font-weight: 800; letter-spacing: .1em; color: var(--muted); margin-bottom: .6rem; }
.ad-dialog-close { position: absolute; top: 10px; right: 12px; font-size: 1.2rem; color: var(--muted); width: 28px; height: 28px; }
.ad-dialog-close:hover { color: var(--ink); }
.ad-dialog .btn { width: 100%; margin-top: 1rem; background: var(--surface-2); color: var(--ink); }
.privacy-badge { font-size: .82rem; color: var(--muted); text-align: center; margin-top: 1rem; }

/* ---- Content sections ---- */
.section { padding-block: 2.4rem; }
.section h2 { font-size: clamp(1.35rem, 3vw, 1.7rem); margin-bottom: 1.3rem; }
.steps-grid { display: grid; gap: 1.2rem; }
@media (min-width: 720px) { .steps-grid { grid-template-columns: repeat(3, 1fr); } }
.steps-grid li { padding: 1.2rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.step-icon { font-size: 1.6rem; display: block; margin-bottom: .6rem; }
.steps-grid h3 { font-size: 1.02rem; margin-bottom: .4rem; }
.steps-grid p { font-size: .88rem; color: var(--ink-soft); }

/* Category table */
.cat-table { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.cat-row { display: grid; grid-template-columns: 14px 1fr auto; align-items: center; gap: .9rem; padding: .85rem 1.1rem; border-bottom: 1px solid var(--border); }
.cat-row:last-child { border-bottom: 0; }
.cat-dot { width: 14px; height: 14px; border-radius: 50%; }
.cat-name { font-weight: 700; font-size: .95rem; }
.cat-range { font-family: var(--mono); font-size: .85rem; color: var(--muted); }

.ideas-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 620px) { .ideas-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .ideas-grid { grid-template-columns: repeat(3, 1fr); } }
.idea-card { padding: 1.1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.idea-card span { font-size: 1.5rem; display: block; margin-bottom: .5rem; }
.idea-card h3 { font-size: .98rem; margin-bottom: .35rem; }
.idea-card p { font-size: .86rem; color: var(--ink-soft); }

.faq-list { display: flex; flex-direction: column; gap: .6rem; max-width: 74ch; }
.faq-list details { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .9rem 1.05rem; background: var(--surface); }
.faq-list summary { font-weight: 700; cursor: pointer; font-size: .96rem; }
.faq-list p { margin-top: .6rem; font-size: .89rem; color: var(--ink-soft); }

/* ---- Footer ---- */
.site-footer { border-top: 1px solid var(--border); padding-block: 1.6rem; margin-top: 1rem; }
.footer-row { display: flex; flex-direction: column; gap: .6rem; align-items: center; text-align: center; font-size: .82rem; color: var(--muted); }
@media (min-width: 620px) { .footer-row { flex-direction: row; justify-content: space-between; text-align: left; } }
.footer-nav { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; }
.footer-nav a { color: var(--muted); }
.footer-nav a:hover { color: var(--ink); }

.note-warn { font-size: .82rem; color: var(--muted); max-width: 74ch; margin-top: 1rem; }

@media (prefers-reduced-motion: reduce) { .ad-toast, .scale-marker { transition: opacity .01s linear; } }