:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --ok: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
}

* { box-sizing: border-box; }

/* El atributo `hidden` debe ganar a los `display` de abajo (.modal, .result). */
[hidden] { display: none !important; }

body {
  margin: 0;
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  text-align: center;
  padding: 2.5rem 1rem 1rem;
}
header h1 { margin: 0; font-size: 1.9rem; }
header .sub { margin: .35rem 0 0; color: var(--muted); }

main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1rem 1rem 4rem;
  display: grid;
  gap: 1.5rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.panel-head h2 { margin: 0; font-size: 1.2rem; }

.field { display: flex; flex-direction: column; gap: .35rem; margin-bottom: 1rem; }
.field label { font-size: .85rem; color: var(--muted); }

input {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: .6rem .7rem;
  font: inherit;
  width: 100%;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
}

button {
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: .6rem 1.1rem;
  background: var(--accent-strong);
  color: #04202e;
  font-weight: 600;
}
button:hover { background: var(--accent); }
button:disabled { opacity: .6; cursor: default; }

button.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
  font-weight: 500;
  padding: .4rem .8rem;
}
button.ghost:hover { background: var(--panel-2); }

.msg { margin: .75rem 0 0; font-size: .9rem; }
.msg.error { color: var(--bad); }
.msg.ok { color: var(--ok); }

.result {
  margin-top: 1.25rem;
  padding: 1rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
}
.result-label { color: var(--muted); font-size: .9rem; }
.result a { color: var(--accent); font-weight: 600; word-break: break-all; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: .6rem .5rem; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
td.empty { text-align: center; color: var(--muted); padding: 1.5rem; }
td .dest { color: var(--muted); max-width: 18rem; display: inline-block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; vertical-align: bottom; }
td a.code { color: var(--accent); font-weight: 600; }

.badge {
  display: inline-block;
  padding: .12rem .5rem;
  border-radius: 999px;
  font-size: .78rem;
  border: 1px solid var(--border);
}
.badge.active { color: var(--ok); border-color: var(--ok); }
.badge.expired, .badge.limit_reached { color: var(--warn); border-color: var(--warn); }
.badge.disabled { color: var(--bad); border-color: var(--bad); }

.row-actions { display: flex; gap: .35rem; flex-wrap: wrap; }
.row-actions button { padding: .3rem .6rem; font-size: .82rem; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, .7);
  display: grid;
  place-items: center;
  padding: 1rem;
  z-index: 50;
}
.modal-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  max-width: 40rem;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
}
.modal-close {
  position: absolute;
  top: .6rem;
  right: .6rem;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 1.1rem;
  padding: .3rem .5rem;
}
.modal h3 { margin-top: 0; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr)); gap: .75rem; margin: 1rem 0; }
.stat-grid .stat { background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: .75rem; }
.stat .n { font-size: 1.5rem; font-weight: 700; }
.stat .k { color: var(--muted); font-size: .8rem; }

.bars { display: grid; gap: .3rem; margin: .5rem 0 1rem; }
.bars .bar-row { display: grid; grid-template-columns: 5.5rem 1fr 2rem; align-items: center; gap: .5rem; font-size: .82rem; }
.bars .bar { height: .8rem; background: var(--accent-strong); border-radius: 3px; min-width: 2px; }

.clicks-list { font-size: .82rem; }
.clicks-list div { padding: .35rem 0; border-bottom: 1px solid var(--border); color: var(--muted); }
.clicks-list .t { color: var(--text); }