/* Estilos compartidos para el curso de Gradiente desde cero. Tema turquesa. */
:root {
  --bg: #0f1117;
  --panel: #1a1d28;
  --panel-2: #232735;
  --border: #2d3346;
  --text: #e4e6ed;
  --text-dim: #9098ad;
  --accent: #2dd4bf;          /* turquesa (primario) */
  --accent-2: #38bdf8;        /* celeste */
  --blue: #7c9eff;
  --green: #34d399;
  --orange: #fb923c;
  --purple: #a78bfa;
  --yellow: #fbbf24;
  --red: #f87171;
  --code-bg: #0a0c12;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}
.container { max-width: 1100px; margin: 0 auto; padding: 24px 32px 80px; }
header { border-bottom: 1px solid var(--border); padding-bottom: 16px; margin-bottom: 32px; }
.step-tag {
  display: inline-block; background: var(--accent); color: #0f1117;
  padding: 4px 12px; border-radius: 20px; font-weight: 600; font-size: 13px; letter-spacing: 0.5px;
}
h1 { font-size: 30px; margin: 14px 0 8px; }
h2 { font-size: 22px; margin: 38px 0 12px; padding-top: 8px; }
h3 { font-size: 17px; margin: 24px 0 8px; color: var(--accent); }
.subtitle { color: var(--text-dim); font-size: 16px; margin: 0; }
p { font-size: 15.5px; }
section { margin-bottom: 8px; }
ul, ol { font-size: 15.5px; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px 20px; margin: 16px 0; }
.panel h3 { margin-top: 0; }
.key-insight {
  background: linear-gradient(135deg, rgba(45,212,191,0.12), rgba(56,189,248,0.10));
  border: 1px solid rgba(45,212,191,0.4); border-left: 4px solid var(--accent);
  border-radius: 8px; padding: 14px 18px; margin: 20px 0; font-size: 15px;
}
.formula {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 16px; text-align: center; font-family: "JetBrains Mono", monospace;
  font-size: 18px; margin: 16px 0; color: var(--text); overflow-x: auto;
}
code { background: var(--code-bg); padding: 2px 6px; border-radius: 4px; font-size: 13.5px; color: var(--accent); }
pre { background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; padding: 16px; overflow-x: auto; font-size: 13.5px; line-height: 1.7; }
.com { color: var(--text-dim); }
.num { color: var(--accent); font-weight: 600; }
.warn {
  background: rgba(251,191,36,0.10); border: 1px solid rgba(251,191,36,0.4);
  border-left: 4px solid var(--yellow); border-radius: 8px; padding: 12px 16px; margin: 16px 0; font-size: 14.5px;
}
.bymano {
  background: rgba(167,139,250,0.07); border: 1px solid rgba(167,139,250,0.35);
  border-left: 4px solid var(--purple); border-radius: 8px; padding: 6px 16px 14px; margin: 14px 0;
}
.bymano-label { display:block; font-size: 11px; color: var(--purple); text-transform: uppercase; letter-spacing: 1px; margin: 10px 0 2px; font-weight: 700; }
.bymano pre { background: transparent; border: none; padding: 6px 0; margin: 0; }
table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 14px; }
th, td { border: 1px solid var(--border); padding: 8px 12px; text-align: center; }
th { background: var(--panel-2); color: var(--text-dim); font-weight: 600; }
.nav-footer { display: flex; justify-content: space-between; gap: 16px; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--text-dim); font-size: 14px; flex-wrap: wrap; }
.nav-footer a { color: var(--accent); text-decoration: none; }
.nav-footer a:hover { text-decoration: underline; }
/* Demo interactivo */
.demo { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 20px; margin: 18px 0; }
.slider-row { display: grid; grid-template-columns: 90px 1fr 80px; align-items: center; gap: 12px; margin: 10px 0; }
.slider-row label { font-family: "JetBrains Mono", monospace; font-size: 14px; color: var(--accent); }
.slider-row .val { font-family: "JetBrains Mono", monospace; font-size: 14px; text-align: right; color: var(--accent); }
input[type=range] { width: 100%; accent-color: var(--accent); }
.demo-result { background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin-top: 16px; font-family: "JetBrains Mono", monospace; font-size: 15px; }
canvas { background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; max-width: 100%; }