:root {
  --bg: #faf9f5; --panel: #ffffff; --text: #1f1e1d; --muted: #6f6c64; --border: #e6e3da;
  --accent: #d97757; --accent-2: #c4613f; --soft: #f6e4dc; --ok: #3f8f4f; --err: #c2412d;
  --serif: Georgia, "Tiempos Text", "Times New Roman", serif;
  --sans: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --mono: "Cascadia Code", Consolas, ui-monospace, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #262624; --panel: #30302e; --text: #ecebe6; --muted: #a29f96; --border: #3d3c38; --soft: #4a3229; color-scheme: dark; }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 var(--sans); -webkit-text-size-adjust: 100%; }
a { color: var(--accent-2); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
header.top { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 22px; color: var(--text); text-decoration: none; }
.brand .logo { color: var(--accent); font-size: 26px; line-height: 1; }
nav.links { display: flex; gap: 18px; align-items: center; }
nav.links a { color: var(--muted); text-decoration: none; font-size: 15px; }
nav.links a:hover { color: var(--text); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 20px; border-radius: 10px; border: 1px solid var(--border); background: var(--panel); color: var(--text); font: 500 15px var(--sans); cursor: pointer; text-decoration: none; min-height: 44px; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-2); }
.btn:disabled { opacity: .55; cursor: default; }
.hero { padding: 56px 0 40px; text-align: center; }
.hero h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(34px, 6vw, 56px); line-height: 1.12; margin: 0 0 18px; letter-spacing: -.01em; }
.hero p.lead { color: var(--muted); font-size: clamp(16px, 2.2vw, 19px); max-width: 640px; margin: 0 auto 28px; }
.hero .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; padding: 24px 0 56px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .ic { color: var(--accent); font-size: 20px; margin-bottom: 8px; display: block; }
section.how { padding: 8px 0 56px; }
section.how h2 { font-family: var(--serif); font-weight: 400; font-size: 30px; margin: 0 0 18px; text-align: center; }
ol.steps { max-width: 680px; margin: 0 auto; padding-left: 22px; color: var(--muted); }
ol.steps li { margin: 8px 0; }
ol.steps b { color: var(--text); font-weight: 600; }
footer { border-top: 1px solid var(--border); padding: 22px 0 32px; color: var(--muted); font-size: 14px; }
/* login */
.auth { min-height: 100vh; min-height: 100dvh; display: grid; place-items: center; padding: 20px; }
.auth .box { width: 100%; max-width: 400px; background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 28px 24px; box-shadow: 0 10px 40px rgba(0,0,0,.08); }
.auth h1 { font-family: var(--serif); font-weight: 400; font-size: 26px; margin: 12px 0 6px; }
.auth p { color: var(--muted); margin: 0 0 18px; font-size: 15px; }
.auth .btn { width: 100%; margin-top: 8px; }
.auth input { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg); color: var(--text); font: 17px var(--mono); letter-spacing: .08em; min-height: 44px; }
.auth label { display: block; font-size: 14px; color: var(--muted); margin: 14px 0 6px; }
.msg { margin-top: 14px; font-size: 14px; min-height: 1.4em; }
.msg.err { color: var(--err); }
.msg.ok { color: var(--ok); }
.alt { margin-top: 18px; text-align: center; font-size: 14px; }
.alt button { background: none; border: 0; color: var(--accent-2); cursor: pointer; font: inherit; text-decoration: underline; padding: 8px; }
.hidden { display: none !important; }
@media (max-width: 600px) { nav.links a:not(.btn) { display: none; } .hero { padding-top: 32px; } }