:root {
    font: 15px/1.45 system-ui, sans-serif;
    color: #202734;
    background: #e6ebf1;
    --surface: #eef0f2;
    --card: #fff;
    --accent: #1757a6;
    --line: #cdd4dd;
}
* { box-sizing: border-box; }
body { margin: 0; }
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .75rem clamp(.8rem, 3vw, 2.5rem);
    background: #17273a;
    color: #fff;
}
button, select { font: inherit; }
button {
    cursor: pointer;
    border: 1px solid var(--line);
    border-radius: .45rem;
    background: var(--card);
    color: inherit;
    padding: .4rem .7rem;
}
button:hover { border-color: var(--accent); }
header button { background: transparent; color: white; border-color: #607086; }
header .brand { border: 0; padding-left: 0; font-size: 1.1rem; }
main { padding: clamp(.9rem, 3vw, 2.5rem); }
h1, h2, h3 { margin: 0 0 .7rem; }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 1rem; }
section { margin-bottom: 1rem; }
.panel {
    background: var(--card);
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: .8rem;
}
.login { max-width: 30rem; margin: 8vh auto; }
.toolbar, .links { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: .8rem; }
.board {
    display: flex;
    align-items: flex-start;
    overflow-x: auto;
    gap: .8rem;
    padding: 0 0 1rem;
}
.board[data-theme="claro"] { --surface: #fff; --card: #f5f7fa; }
.board[data-theme="grafito"] { --surface: #293344; --card: #37465b; --line: #607086; color: #f8fafc; }
.board[data-theme="pacifico"] { --surface: #dcefe9; --card: #f6fffc; --line: #9ac4b8; }
.list {
    flex: 0 0 min(18rem, 82vw);
    min-width: 0;
    padding: .75rem;
    background: var(--surface);
    border-radius: .8rem;
}
.list h2 { display: flex; gap: .5rem; justify-content: space-between; }
.list h2 small { font-weight: 400; }
.cards { max-height: min(60vh, 36rem); overflow-y: auto; }
.card {
    margin-bottom: .4rem;
    padding: .65rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: .5rem;
    overflow-wrap: anywhere;
}
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: .55rem; border-bottom: 1px solid var(--line); }
.table { overflow: auto; }