/* Base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;
  line-height: 1.45;
  background: #000; /* fallback por si algo no pinta */
}

/* =========================================================
   THEMES (CSS-only)
   - Default: Light
   - Dark: .page:has(#theme-toggle:checked)
   ========================================================= */

.page{
  /* Light theme */
  --bg: #ffffff;
  --fg: #000000;
  --muted: #222;
  --border: #000;
  --link: #0000EE;     /* azul clásico */
  --visited: #551A8B;  /* morado clásico */
  --focus: #000;
  --panel: #fff;
  --soft: #f6f6f6;

  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
}

/* Dark theme toggle (no JS) */
.page:has(#theme-toggle:checked){
  --bg: #0b0b0b;
  --fg: #f2f2f2;
  --muted: #c9c9c9;
  --border: #f2f2f2;

  /* “retro” pero legible en oscuro */
  --link: #7aa2ff;
  --visited: #c58af9;

  --focus: #ffffff;
  --panel: #0f0f0f;
  --soft: #161616;
}

a{ color: var(--link); }
a:visited{ color: var(--visited); }
a:hover{ text-decoration: none; }
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible{
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* Layout */
.layout{
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

/* Side menu */
nav{
  border-right: 2px solid var(--border);
  padding: 14px 12px;
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow: auto;
  background: var(--panel);
}

.brand{
  border: 2px solid var(--border);
  padding: 10px;
  margin-bottom: 12px;
}

/* Brand row with theme toggle */
.brand-row{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.brand .title{
  font-weight: 700;
  letter-spacing: 0.5px;
  margin: 0 0 6px 0;
}
.brand .tagline{
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

/* Theme toggle button (checkbox styled) */
#theme-toggle{
  appearance: none;
  -webkit-appearance: none;
  width: 38px;
  height: 34px;
  border: 2px solid var(--border);
  background: var(--soft);
  display: grid;
  place-items: center;
  cursor: pointer;
  flex: 0 0 auto;
}
#theme-toggle::before{
  content: "☀";
  font-size: 16px;
  line-height: 1;
}
.page:has(#theme-toggle:checked) #theme-toggle::before{
  content: "☾";
}
#theme-toggle:hover{
  background: var(--panel);
}

.navlist{
  list-style: none;
  padding: 0;
  margin: 12px 0 0 0;
  border: 2px solid var(--border);
}
.navlist li{
  border-top: 1px solid var(--border);
}
.navlist li:first-child{ border-top: 0; }
.navlist a{
  display: block;
  padding: 10px 10px;
  text-decoration: none;
  color: var(--fg);
}
.navlist a:hover{
  background: var(--soft);
  text-decoration: underline;
}

.meta{
  margin-top: 12px;
  padding: 10px;
  border: 2px dashed var(--border);
  font-size: 12px;
  color: var(--fg);
}
.meta code{ font-size: 12px; }

/* Main content */
main{
  padding: 16px 18px 32px;
  max-width: 980px;
}

header{
  border: 2px solid var(--border);
  padding: 14px;
  margin-bottom: 14px;
  background: var(--panel);
}
header h1{
  margin: 0 0 6px 0;
  font-size: 22px;
}
header .sub{
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.skip{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--panel);
  color: var(--fg);
  border: 2px solid var(--border);
  padding: 8px 10px;
  z-index: 999;
}
.skip:focus{
  left: 10px;
  top: 10px;
}

section{
  border: 2px solid var(--border);
  padding: 14px;
  margin: 0 0 14px 0;
  background: var(--panel);
}
section h2{
  margin: 0 0 10px 0;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.hr{
  border-top: 1px dotted var(--border);
  margin: 10px 0 12px;
  height: 0;
}

/* “Old web” blocks */
.badge{
  display: inline-block;
  border: 1px solid var(--border);
  padding: 2px 6px;
  font-size: 12px;
  margin-right: 6px;
  background: var(--soft);
  color: var(--fg);
}
.two-col{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* Tables (90s vibe) */
table{
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td{
  border: 1px solid var(--border);
  padding: 8px;
  vertical-align: top;
}
th{
  background: var(--soft);
  text-align: left;
}

/* Lists */
ul{ margin: 8px 0 0 18px; }
li{ margin: 4px 0; }

/* Projects */
.project{
  border: 1px solid var(--border);
  padding: 10px;
  margin: 10px 0 0;
  background: var(--panel);
}
.project h3{
  margin: 0 0 6px;
  font-size: 14px;
}
.project p{ margin: 0; }
.project .links{ margin-top: 6px; font-size: 13px; }

/* Contact form */
form{
  display: grid;
  gap: 10px;
  max-width: 520px;
}
label{
  display: grid;
  gap: 4px;
  font-size: 13px;
}
input, textarea{
  border: 2px solid var(--border);
  padding: 8px;
  font: inherit;
  background: var(--panel);
  color: var(--fg);
}
textarea{ min-height: 110px; resize: vertical; }
button{
  border: 2px solid var(--border);
  background: var(--soft);
  color: var(--fg);
  padding: 8px 10px;
  font: inherit;
  cursor: pointer;
  width: fit-content;
}
button:hover{ background: var(--panel); }

footer{
  margin-top: 18px;
  border: 2px solid var(--border);
  padding: 10px;
  font-size: 12px;
  color: var(--muted);
  background: var(--panel);
}

/* Responsive */
@media (max-width: 860px){
  .layout{ grid-template-columns: 1fr; }
  nav{
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 2px solid var(--border);
  }
  .two-col{ grid-template-columns: 1fr; }
  main{ padding: 14px; }
}