/* Isa — design repris de Myanatra v2, allégé */
:root{
  --green:#2e7d32; --green-dark:#1b5e20; --green-900:#0e3311;
  --green-50:#eef6ee; --yellow:#ffb300; --yellow-dark:#e69a00;
  --bg:#fef9ec; --surface:#fff; --ink:#1c2b26; --muted:#5f7168;
  --border:rgba(28,43,38,.08); --border-strong:rgba(28,43,38,.14);
  --radius:18px; --radius-lg:26px; --radius-full:999px;
  --shadow-sm:0 2px 10px rgba(28,43,38,.06);
  --shadow-md:0 8px 28px rgba(28,43,38,.09);
  --shadow-card:0 4px 18px rgba(28,43,38,.07);
  --font:'Nunito',system-ui,-apple-system,sans-serif;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);min-height:100dvh;display:flex;flex-direction:column;line-height:1.6}
main{flex:1;max-width:720px;margin:0 auto;padding:0 clamp(14px,4vw,24px) 48px;width:100%}

/* header */
.site-header{position:sticky;top:0;z-index:10;background:rgba(254,249,236,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.header-inner{max-width:720px;margin:0 auto;padding:10px clamp(14px,4vw,24px);display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:8px;font-weight:900;font-size:1.2rem;color:var(--green-dark);text-decoration:none}
.tag{font-size:.72rem;font-weight:800;padding:5px 10px;border-radius:999px;background:var(--green-50);color:var(--green-dark);border:1px solid rgba(46,125,50,.12)}

/* hero */
.hero{text-align:center;padding:28px 12px 10px}
.hero h1{font-size:clamp(1.6rem,4.5vw,2.2rem);letter-spacing:-.03em;color:var(--green-900)}
.hero h1 .accent{background:linear-gradient(90deg,var(--green),#3a9a3e);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero .sub{color:var(--muted);max-width:560px;margin:8px auto 0;font-size:.98rem}
.hero .sub code{background:#fff;border:1px solid var(--border);padding:1px 6px;border-radius:6px;font-size:.84rem}

/* card */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);padding:20px clamp(16px,4vw,24px);margin-top:18px}
.card h2{font-size:1.05rem;letter-spacing:-.02em;margin-bottom:8px}
.card.muted{background:linear-gradient(180deg,#fff, #fef9ec);border-style:dashed}
.label{font-weight:800;font-size:.9rem;color:var(--ink);display:block;margin-bottom:8px}
.input-row{display:flex;gap:10px}
.input-row input{flex:1;font-size:1.35rem;font-weight:900;letter-spacing:-.02em;padding:14px 16px;border-radius:16px;border:1.5px solid var(--border-strong);outline:none;background:#fff}
.input-row input:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(46,125,50,.12)}
.error{min-height:18px;color:var(--green-900);font-weight:700;font-size:.86rem;margin-top:6px}
.error:not(:empty){color:#c62828}
.result-wrap{display:flex;gap:10px;align-items:stretch;margin-top:14px}
.result{flex:1;background:linear-gradient(135deg,#eef6ee,#fff7cc);border:1px solid var(--border);border-radius:16px;padding:18px 16px;font-size:clamp(1.05rem,3vw,1.35rem);font-weight:800;line-height:1.35;min-height:64px;display:grid;place-items:center;text-align:center;color:var(--green-900);word-break:break-word}
.result.has-value{background:#fff;border-color:var(--green);box-shadow:var(--shadow-sm)}
.examples{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:14px}
.examples .hint{font-size:.82rem;color:var(--muted);font-weight:700}
.examples button{padding:7px 12px;border-radius:999px;border:1px solid var(--border-strong);background:#fff;font-weight:800;cursor:pointer}
.examples button:hover{border-color:var(--green);background:var(--green-50)}
.history{display:flex;flex-direction:column;gap:8px}
.history .hint{color:var(--muted);font-size:.88rem}
.hist-item{display:flex;justify-content:space-between;gap:12px;padding:10px 12px;border-radius:12px;border:1px solid var(--border);background:#fff;cursor:pointer;text-align:left}
.hist-item:hover{border-color:var(--green);background:var(--green-50)}
.hist-num{font-weight:900;color:var(--green-dark)}
.hist-word{color:var(--ink);font-weight:700;font-size:.92rem;text-align:right}
.hist-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}
.hist-head h2{margin-bottom:0}
.btn-sm{padding:8px 12px;min-height:34px;font-size:.84rem}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:999px;padding:12px 18px;font-weight:800;border:none;cursor:pointer;white-space:nowrap;min-height:44px;transition:transform .14s var(--ease),box-shadow .14s var(--ease)}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 8px 22px rgba(46,125,50,.28)}
.btn-primary:hover{background:var(--green-dark)}
.btn-ghost{background:#fff;color:var(--green-dark);border:1.5px solid var(--green);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{background:var(--green-50)}

/* footer */
.site-footer{margin-top:18px;background:var(--green-900);color:#e8f5e9;padding:18px clamp(14px,4vw,24px)}
.footer-inner{max-width:720px;margin:0 auto;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.88rem;align-items:center}
.site-footer a{color:var(--yellow);text-decoration:none;font-weight:700}
.site-footer a.fb-link{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.12);color:#fff;font-weight:800;border:1px solid rgba(255,255,255,.18);text-decoration:none}
.site-footer a.fb-link:hover{background:rgba(255,255,255,.2)}
.site-footer code{background:rgba(255,255,255,.12);padding:2px 6px;border-radius:6px}
.hero-ctas{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.btn-facebook{background:#1877F2;color:#fff;box-shadow:0 6px 18px rgba(24,119,242,.28)}
.btn-facebook:hover{background:#1664cf;color:#fff}
.btn-whatsapp{background:#25D366;color:#0e3311;box-shadow:0 6px 18px rgba(37,211,102,.28)}
.btn-whatsapp:hover{background:#1fb85a}
.teaser{text-align:center;color:var(--muted);font-size:.9rem;font-style:italic;margin-top:18px;opacity:.9;letter-spacing:.01em}
@media(max-width:520px){.result-wrap{flex-direction:column}.input-row{flex-direction:column}}