/*
 * components.css — shared interface components, built by js/ui.js and used
 * by every module. Colors come from tokens.css only.
 */

/* ------------------------------ icons ----------------------------- */
.nb-icon { flex: none; display: block; }

/* ----------------------------- buttons ---------------------------- */
.nb-btn {
  min-height: var(--tap);
  padding: 0 16px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: var(--r-m);
  border: 1px solid var(--hairline-strong);
  background: transparent;
  color: var(--text);
  font: 600 var(--fs-body)/1.1 var(--font-body);
  white-space: nowrap;
  text-decoration: none;
  transition: background-color 120ms var(--ease), border-color 120ms var(--ease), opacity 120ms var(--ease);
  -webkit-user-select: none; user-select: none;
  touch-action: manipulation;
}
.nb-btn:hover { background: var(--hover); }
.nb-btn:active { background: var(--track); }
.nb-btn--primary { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.nb-btn--primary:hover, .nb-btn--primary:active { background: var(--ink); opacity: 0.9; }
.nb-btn--quiet { border-color: transparent; color: var(--text-2); }
.nb-btn--quiet:hover { color: var(--text); }
.nb-btn--text { border-color: transparent; color: var(--accent); padding-inline: 10px; }
.nb-btn--danger { background: var(--overdue); border-color: var(--overdue); color: var(--on-ink); }
.nb-btn--danger:hover, .nb-btn--danger:active { background: var(--overdue); opacity: 0.9; }
.nb-btn--small { min-height: 36px; padding-inline: 12px; font-size: var(--fs-small); }
.nb-btn--block { width: 100%; }
.nb-btn:disabled, .nb-btn[aria-disabled="true"] { opacity: 0.4; pointer-events: none; }

.nb-iconbtn {
  width: var(--tap); height: var(--tap);
  display: inline-flex; align-items: center; justify-content: center;
  border: 0; border-radius: var(--r-m);
  background: transparent; color: var(--text-2);
  flex: none; position: relative;
  transition: background-color 120ms var(--ease), color 120ms var(--ease);
  -webkit-user-select: none; user-select: none;
  touch-action: manipulation;
}
.nb-iconbtn:hover { background: var(--hover); color: var(--text); }
.nb-iconbtn:active { background: var(--track); }
.nb-iconbtn.is-on, .nb-iconbtn[aria-pressed="true"], .nb-iconbtn[aria-checked="true"] { background: var(--accent-wash); color: var(--accent); }
.nb-iconbtn:disabled { opacity: 0.35; pointer-events: none; }
/* count badge, e.g. due reminders */
.nb-iconbtn__count {
  position: absolute; top: 5px; right: 3px;
  min-width: 17px; height: 17px; padding: 0 4px;
  border-radius: 9px; background: var(--overdue); color: var(--on-ink);
  font: 500 11px/17px var(--font-util); text-align: center;
  font-variant-numeric: tabular-nums;
}

.nb-vr { width: 1px; height: 24px; background: var(--hairline-strong); margin-inline: 8px; flex: none; }

/* --------------------------- layer root --------------------------- */
.nb-layer { position: fixed; inset: 0; z-index: 1000; pointer-events: none; }
.nb-layer > * { pointer-events: auto; }

/* ------------------------------ dialog ---------------------------- */
.nb-scrim {
  position: fixed; inset: 0; z-index: 10;
  display: grid; place-items: center;
  padding: max(16px, env(safe-area-inset-top, 0px)) 16px max(16px, env(safe-area-inset-bottom, 0px));
  /* with a software keyboard up only part of the window is on screen: the
     dialog is centred in that part (js/app.js sets the two variables) */
  padding-top: max(16px, env(safe-area-inset-top, 0px), var(--nb-vv-top, 0px));
  padding-bottom: max(16px, env(safe-area-inset-bottom, 0px), var(--nb-kb, 0px));
  background: var(--scrim);
  opacity: 0; transition: opacity 160ms var(--ease);
  overflow: auto;
}
.nb-scrim.is-open { opacity: 1; }
.nb-dialog {
  width: min(100%, 480px);
  /* the scrim's grid track is auto-sized, so a percentage would not bind */
  max-height: calc(100vh - 32px);
  max-height: calc(100dvh - 32px - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px));
  max-height: calc(var(--nb-vv-h, 100dvh) - 32px - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px));
  display: flex; flex-direction: column;
  background: var(--raised);
  border-radius: var(--r-l);
  box-shadow: var(--shadow-float);
  transform: translateY(8px); transition: transform 160ms var(--ease);
  outline: none;
}
.nb-scrim.is-open .nb-dialog { transform: none; }
.nb-dialog--sm { width: min(100%, 380px); }
.nb-dialog--lg { width: min(100%, 640px); }
.nb-dialog__head {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 10px 8px 2px 20px; min-height: 56px;
}
.nb-dialog__title { font: 600 var(--fs-title)/1.2 var(--font-display); letter-spacing: -0.01em; text-wrap: balance; min-width: 0; }
.nb-dialog__body { padding: 6px 20px 16px; overflow: auto; display: flex; flex-direction: column; gap: 14px; min-height: 0; }
.nb-dialog__text { color: var(--text-2); }
.nb-dialog__foot {
  display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--hairline);
}
.nb-dialog.is-busy { cursor: progress; }

/* ------------------------------ popover --------------------------- */
.nb-popover {
  position: fixed; left: 0; top: 0; z-index: 20;
  background: var(--raised);
  border-radius: 12px;
  box-shadow: var(--shadow-float);
  overflow: auto;
  opacity: 0; transform: scale(0.98);
  transition: opacity 120ms var(--ease), transform 120ms var(--ease);
  outline: none;
}
.nb-popover.is-open { opacity: 1; transform: none; }
.nb-popover--pad { padding: 12px; }

.nb-menu { display: flex; flex-direction: column; padding: 6px; min-width: 220px; }
.nb-menu__item {
  min-height: var(--tap);
  display: flex; align-items: center; gap: 12px;
  padding: 6px 12px 6px 10px;
  border: 0; border-radius: var(--r-s);
  background: transparent; color: var(--text);
  text-align: left; font: 500 var(--fs-body)/1.25 var(--font-body);
}
.nb-menu__item:hover, .nb-menu__item:focus-visible { background: var(--hover); }
.nb-menu__item .nb-icon { color: var(--text-2); }
.nb-menu__item.is-danger, .nb-menu__item.is-danger .nb-icon { color: var(--overdue); }
.nb-menu__item:disabled { opacity: 0.4; pointer-events: none; }
.nb-menu__noicon { width: 20px; flex: none; }
.nb-menu__label { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.nb-menu__hint { font: 400 12px/1.3 var(--font-body); color: var(--text-3); }
.nb-menu__check { color: var(--accent) !important; }
.nb-menu__sep { height: 1px; background: var(--hairline); margin: 6px 4px; }
.nb-menu__heading { padding: 10px 12px 4px; font: 500 var(--fs-micro)/1 var(--font-util); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); }

/* ------------------------------- toast ---------------------------- */
.nb-toasts {
  position: fixed; left: 0; right: 0; z-index: 30;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  bottom: calc(16px + env(safe-area-inset-bottom, 0px) + var(--nb-kb, 0px));   /* above a software keyboard */
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding-inline: 16px;
  pointer-events: none;
}
.nb-toast {
  pointer-events: auto;
  max-width: min(560px, 100%);
  display: flex; align-items: center; gap: 10px;
  padding: 4px 4px 4px 14px; min-height: 48px;
  background: var(--text); color: var(--desk);
  border-radius: 12px;
  box-shadow: var(--shadow-float);
  font-size: 14px; line-height: 1.35;
  opacity: 0; transform: translateY(8px);
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.nb-toast.is-open { opacity: 1; transform: none; }
.nb-toast__text { flex: 1; min-width: 0; padding-block: 8px; overflow-wrap: anywhere; }
.nb-toast__action {
  min-height: 40px; padding: 0 12px; border: 0; border-radius: var(--r-s);
  background: transparent; color: inherit; font: 600 14px/1 var(--font-body);
  text-decoration: underline; text-underline-offset: 3px; white-space: nowrap;
}
.nb-toast .nb-toast__close { width: 40px; height: 40px; color: inherit; opacity: 0.7; }
.nb-toast .nb-toast__close:hover { background: transparent; opacity: 1; color: inherit; }
.nb-toast--error > .nb-icon, .nb-toast--warn > .nb-icon { color: var(--today-wash); }

/* --------------------------- busy overlay -------------------------- */
.nb-busy {
  position: fixed; inset: 0; z-index: 15;
  display: grid; place-items: center; padding: 16px;
  background: var(--scrim);
  opacity: 0; transition: opacity 160ms var(--ease);
}
.nb-busy--local { position: absolute; }
@supports (background: color-mix(in srgb, red 50%, transparent)) {
  .nb-busy--local { background: color-mix(in srgb, var(--desk) 72%, transparent); }
}
.nb-busy.is-open { opacity: 1; }
.nb-busy__card {
  width: min(100%, 380px);
  display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 14px 14px;
  padding: 18px 18px 16px;
  background: var(--raised); border-radius: var(--r-l); box-shadow: var(--shadow-float);
}
.nb-busy__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.nb-busy__title { font: 600 16px/1.25 var(--font-body); }
.nb-busy__detail { font: 400 12px/1.4 var(--font-util); color: var(--text-2); min-height: 17px; }
.nb-busy__bar { grid-column: 1 / -1; height: 4px; border-radius: 4px; background: var(--track); overflow: hidden; position: relative; }
.nb-busy__bar i { position: absolute; inset: 0 auto 0 0; width: 36%; border-radius: 4px; background: var(--accent); animation: nb-slide 1.4s var(--ease) infinite; }
.nb-busy__bar.is-determinate i { animation: none; transition: width 240ms var(--ease); }
.nb-busy__card > .nb-btn { grid-column: 1 / -1; justify-self: end; }
/* three strokes being written: the mark of work in progress */
.nb-busy__mark { width: 36px; height: 36px; display: grid; align-content: center; gap: 6px; }
.nb-busy__mark span { height: 3px; border-radius: 3px; background: var(--ink); transform-origin: left center; animation: nb-write 1.5s var(--ease) infinite; }
.nb-busy__mark span:nth-child(2) { animation-delay: 0.18s; width: 78%; }
.nb-busy__mark span:nth-child(3) { animation-delay: 0.36s; width: 54%; }
@keyframes nb-write { 0% { transform: scaleX(0); opacity: 1; } 55% { transform: scaleX(1); opacity: 1; } 100% { transform: scaleX(1); opacity: 0.15; } }
@keyframes nb-slide { 0% { left: -36%; } 100% { left: 100%; } }
@keyframes nb-spin { to { transform: rotate(360deg); } }
.nb-spin { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--hairline-strong); border-top-color: var(--accent); animation: nb-spin 0.9s linear infinite; flex: none; display: inline-block; }

/* ------------------------------ fields ---------------------------- */
.nb-field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.nb-field__label { font: 600 var(--fs-small)/1.2 var(--font-body); color: var(--text-2); }
.nb-field__hint { font: 400 12px/1.4 var(--font-body); color: var(--text-3); }
.nb-field-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }

.nb-input, .nb-textarea, .nb-select {
  width: 100%; min-height: var(--tap);
  padding: 10px 12px;
  border: 1px solid transparent; border-radius: var(--r-m);
  background: var(--track); color: var(--text);
  font: 400 16px/1.35 var(--font-body);      /* 16px stops iOS from zooming on focus */
  -webkit-appearance: none; appearance: none;
}
.nb-textarea { min-height: 88px; resize: vertical; }
.nb-select {
  padding-right: 36px;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-2) 50%), linear-gradient(135deg, var(--text-2) 50%, transparent 50%);
  background-position: calc(100% - 19px) 50%, calc(100% - 14px) 50%;
  background-size: 5px 5px, 5px 5px; background-repeat: no-repeat;
}
.nb-input::placeholder, .nb-textarea::placeholder { color: var(--text-3); opacity: 1; }
.nb-input:focus-visible, .nb-textarea:focus-visible, .nb-select:focus-visible { outline: 2px solid var(--accent); outline-offset: 0; background: var(--raised); }
.nb-input[aria-invalid="true"] { border-color: var(--overdue); }
.nb-field__error { font: 500 12px/1.4 var(--font-body); color: var(--overdue); }

/* quoted source text (what a reminder or suggestion came from) */
.nb-quote {
  padding: 8px 12px; border-radius: var(--r-s);
  background: var(--accent-wash); color: var(--text);
  font: 400 14px/1.4 var(--font-body);
  overflow-wrap: anywhere;
}
.nb-quote--hand { font: 500 21px/1.25 var(--font-hand); }

/* check row (settings) */
.nb-check { display: flex; align-items: center; gap: 12px; min-height: var(--tap); }
.nb-check input { width: 22px; height: 22px; accent-color: var(--accent); flex: none; margin: 0; }
.nb-check span { min-width: 0; }

/* --------------------------- segmented ---------------------------- */
.nb-segmented {
  display: inline-grid; grid-auto-flow: column; grid-auto-columns: 1fr;
  padding: 3px; gap: 0;
  background: var(--track); border-radius: 12px;
}
.nb-segmented__opt {
  min-height: 38px; padding: 0 14px;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 0; border-radius: 9px; background: transparent; color: var(--text-2);
  font: 600 14px/1 var(--font-body); white-space: nowrap;
  touch-action: manipulation;
}
/* in the dark theme a raised thumb would be darker than its well: it is lighter, with a ring */
.nb-segmented__opt[aria-checked="true"] { background: var(--thumb); color: var(--text); box-shadow: var(--shadow-thumb), inset 0 0 0 1.5px var(--thumb-ring); }
.nb-segmented__opt:disabled { opacity: 0.4; }

/* ------------------------------ chips ----------------------------- */
.nb-chip {
  display: inline-flex; align-items: center; gap: 4px;
  min-height: 22px; padding: 0 8px;
  border-radius: 6px;
  background: var(--track); color: var(--text-2);
  font: 500 var(--fs-micro)/1 var(--font-util); letter-spacing: 0.06em; text-transform: uppercase;
  white-space: nowrap;
}
.nb-chip--overdue, .nb-chip--urgent { background: var(--overdue-wash); color: var(--overdue); }
.nb-chip--today, .nb-chip--soon { background: var(--today-wash); color: var(--today); }
.nb-chip--upcoming, .nb-chip--later { background: var(--upcoming-wash); color: var(--upcoming); }
.nb-chip--ok { background: var(--ok-wash); color: var(--ok); }

/* --------------------------- empty state -------------------------- */
.nb-empty {
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
  padding: 20px; color: var(--text-2); font-size: 14px;
}
.nb-empty__title { font: 600 16px/1.3 var(--font-display); color: var(--text); }
.nb-empty .nb-icon { color: var(--text-3); }

/* --------------------------- color swatch ------------------------- */
.nb-swatch {
  width: var(--tap); height: var(--tap);
  border: 0; background: transparent; border-radius: var(--r-m);
  display: grid; place-items: center; flex: none;
  touch-action: manipulation;
}
.nb-swatch::before {
  content: ""; width: 24px; height: 24px; border-radius: 50%;
  background: var(--c, var(--ink));
  box-shadow: inset 0 0 0 1px var(--hairline-strong);
}
.nb-swatch[aria-checked="true"]::before, .nb-swatch.is-on::before { box-shadow: 0 0 0 2px var(--raised), 0 0 0 4px var(--text); }

/* --------------------------- sheet head --------------------------- */
/* Title and facts at the top of a sheet. --zoom follows the written page. */
.nb-sheethead {
  --zoom: 1;
  display: flex; flex-direction: column; justify-content: flex-end; gap: calc(6px * var(--zoom));
  min-width: 0;
  pointer-events: none;
}
.nb-sheethead__title {
  pointer-events: auto;
  width: 100%; min-width: 0;
  min-height: max(24px, calc(36px * var(--zoom)));
  padding: 0; margin: 0;
  border: 0; border-radius: 4px; background: transparent; color: var(--text);
  /* never under 16px: on a phone the sheet is small, and iOS zooms the page in for a smaller field */
  font: 600 max(16px, calc(26px * var(--zoom)))/1.15 var(--font-display);
  letter-spacing: -0.01em;
  text-overflow: ellipsis;
}
.nb-sheethead__title::placeholder { color: var(--text-3); opacity: 0.8; }
.nb-sheethead__title:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.nb-sheethead__meta {
  font: 400 max(10px, calc(12px * var(--zoom)))/1.4 var(--font-util);
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* a phone-sized sheet keeps only the title, on one line */
.nb-sheethead--compact { gap: 0; }
.nb-sheethead--compact .nb-sheethead__meta { display: none; }
.nb-sheethead--compact .nb-sheethead__title { white-space: nowrap; overflow: hidden; }

/* --------------------------- margin flag -------------------------- */
.nb-flag {
  display: inline-flex; align-items: center; gap: 3px;
  min-height: 28px; max-width: 100%;
  padding: 0 4px; margin: 0;
  border: 0; border-radius: 6px; background: transparent;
  color: var(--upcoming);
  font: 500 11px/1 var(--font-util); font-variant-numeric: tabular-nums;
  white-space: nowrap;
  position: relative;
  touch-action: manipulation;
}
/* the flag is small; its touch target is not */
.nb-flag::after { content: ""; position: absolute; inset: -8px -4px; }
.nb-flag:hover { background: var(--hover); }
.nb-flag__date { overflow: hidden; text-overflow: ellipsis; color: var(--text-2); }
.nb-flag--overdue { color: var(--overdue); }
.nb-flag--today { color: var(--today); }
.nb-flag--upcoming, .nb-flag--none { color: var(--upcoming); }
.nb-flag--compact .nb-flag__date { display: none; }