/* Date Difference Calculator. Needs /assets/css/modern-tool-cards.css (tokens + .cat-calc accent). */
.dd, .dd *, .dd *::before, .dd *::after { box-sizing: border-box; }
.dd { display: grid; gap: 1rem; }
.dd [hidden] { display: none !important; }

.dd-panel { background: var(--tc-bg); border: 1px solid var(--tc-border); border-radius: 20px; box-shadow: var(--tc-shadow); overflow: hidden; display: grid; }

.dd-panel__head { display: flex; align-items: center; flex-wrap: wrap; gap: .6rem; padding: .9rem 1.25rem; background: var(--tc-surface); border-bottom: 1px solid var(--tc-border); }
.dd-panel__head h3 { margin: 0; font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--tc-muted); }
.dd-panel__head > i { color: var(--accent); font-size: 1.1rem; }

.dd-body { display: grid; gap: 1rem; padding: 1.25rem; }

.dd-fields { display: flex; flex-wrap: wrap; gap: 1rem; }
.dd-field { display: grid; gap: .35rem; flex: 1 1 12rem; }
.dd-field label { font-size: .8rem; font-weight: 600; color: var(--tc-muted); }
.dd-field input {
  height: 2.6rem; padding: 0 .9rem; font: inherit; font-size: .95rem;
  color: var(--tc-text); background: var(--tc-bg); border: 1px solid var(--tc-border); border-radius: 12px;
  width: 100%; max-width: 16rem;
}
.dd-field input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }

.dd-check { display: inline-flex; align-items: center; gap: .5rem; font-size: .88rem; font-weight: 600; color: var(--tc-text); cursor: pointer; }
.dd-check input { width: 1.1rem; height: 1.1rem; accent-color: var(--accent); cursor: pointer; }

.dd-error { margin: 0; font-size: .85rem; font-weight: 600; color: #dc2626; }

.dd-result { display: grid; gap: 1rem; padding-top: .9rem; border-top: 1px solid var(--tc-border); }
.dd-result__main { font-size: 1.3rem; font-weight: 800; color: var(--accent); }

.dd-result__chips { display: flex; flex-wrap: wrap; gap: .6rem; }
.dd-chip { flex: 1 1 8rem; background: var(--tc-surface); border: 1px solid var(--tc-border); border-radius: 14px; padding: .7rem 1rem; display: grid; gap: .15rem; }
.dd-chip__value { font-size: 1.3rem; font-weight: 800; color: var(--tc-text); font-variant-numeric: tabular-nums; }
.dd-chip__label { font-size: .76rem; font-weight: 600; color: var(--tc-muted); text-transform: uppercase; letter-spacing: .03em; }

.dd-weekdays { margin: 0; font-size: .86rem; color: var(--tc-muted); }

.dd-foot { margin: 0; display: flex; gap: .5rem; font-size: .84rem; color: var(--tc-muted); }
.dd-foot i { color: var(--accent); margin-top: .15rem; }