:root {
  --bg: #f6f7f9;
  --card: #fff;
  --text: #14181f;
  --muted: #5c6470;
  --primary: #2f6bff;   /* azul do "u" e do "Tools" */
  --accent: #f5960f;    /* laranja da seta e do "Go" */
  --primary-light: #eaf0ff;
  --border: #e3e6ec;
  --warn: #92400e;
  --warn-bg: #fef3c7;
  --err: #b91c1c;
  --err-bg: #fee2e2;
  --ok: #166534;
  --ok-bg: #dcfce7;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--primary); }

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.site-header .logo img { display: block; }
.site-header nav { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.site-header nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: .95rem; font-weight: 500; }
.site-header nav a:hover { color: var(--primary); }
.lang-switch a { margin-left: 6px; font-size: .8rem; border: 1px solid var(--border); padding: 3px 9px; border-radius: 6px; color: var(--muted); }
.lang-switch a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

main { max-width: 820px; margin: 0 auto; padding: 28px 20px 60px; }
h1 { font-size: 1.8rem; margin-bottom: 6px; }
.subtitle { color: var(--muted); margin-top: 0; margin-bottom: 24px; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 26px; }
.notice { background: var(--warn-bg); color: var(--warn); border-radius: 8px; padding: 12px 14px; font-size: .88rem; margin-bottom: 18px; }

.field { margin-bottom: 16px; }
label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .9rem; }
.checkbox-label { display: flex; align-items: center; gap: 8px; font-weight: 500; }
input[type="number"], input[type="text"], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 1rem; background: #fff; color: var(--text);
}
input[type="range"] { width: 85%; vertical-align: middle; }
.range-val { font-weight: 700; color: var(--primary); }
textarea { min-height: 260px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9rem; resize: vertical; }

.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
button, .btn-primary, .btn-secondary {
  border: none; padding: 11px 20px; border-radius: 8px; font-size: .95rem; font-weight: 600; cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { opacity: .92; }
.btn-secondary { background: #fff; color: var(--primary); border: 1px solid var(--primary); }

.result-box, .status-box {
  margin-top: 20px; padding: 16px 18px; border-radius: 10px; background: var(--primary-light);
  display: none; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.result-box.show, .status-box.show { display: flex; }
.status-box.ok { background: var(--ok-bg); color: var(--ok); }
.status-box.err { background: var(--err-bg); color: var(--err); }
.result-value { font-size: 1.6rem; font-weight: 700; color: var(--primary); font-family: ui-monospace, monospace; }
.result-classification { font-weight: 600; }
.result-extra { font-size: .88rem; color: var(--muted); width: 100%; }
.copy-btn { background: #fff; border: 1px solid var(--primary); color: var(--primary); padding: 8px 14px; border-radius: 8px; font-weight: 600; cursor: pointer; }

article { margin-top: 40px; }
article h2 { font-size: 1.3rem; margin-top: 32px; }
table { width: 100%; border-collapse: collapse; margin: 16px 0; }
table th, table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: .92rem; }
.faq details { border-bottom: 1px solid var(--border); padding: 12px 0; }
.faq summary { font-weight: 600; cursor: pointer; }

.cat-block { margin-bottom: 32px; }
.tool-list { list-style: none; padding: 0; margin: 0; }
.tool-list li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.tool-list a { font-weight: 600; text-decoration: none; }
.tool-list a:hover { text-decoration: underline; }

.site-footer { text-align: center; color: var(--muted); font-size: .85rem; padding: 30px 20px; }