@tailwind base;
@tailwind components;
@tailwind utilities;

html,
body,
#app {
  height: 100%;
}

/* Track the VISUAL viewport, not the layout viewport.
 *
 * On a phone the two diverge the moment the on-screen keyboard opens or the URL bar
 * retracts: `100%` keeps the taller layout viewport, which slides the sticky header
 * off screen and can park a focused field underneath the keyboard. `dvh` is the unit
 * that follows the box actually being shown.
 *
 * Same three selectors rather than a fourth rule, so the box model is unchanged and
 * only the number moves; behind @supports so a browser without `dvh` keeps the
 * `100%` above instead of falling back to nothing. */
@supports (height: 100dvh) {
  html,
  body,
  #app {
    height: 100dvh;
  }
}

/* Landscape on a notched phone puts the cutout down one SIDE of the page, and with
 * `viewport-fit=cover` (index.html) the page is drawing under it. Applied to body so
 * every view inherits it, rather than each container remembering; the insets are 0
 * on every device that has no cutout, and 0 in portrait, so this costs nothing where
 * it isn't needed. Top and bottom are NOT done here — a sticky header and a scrolling
 * board need them in their own boxes, not on the page. */
body {
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

body {
  @apply bg-neutral-50 text-neutral-900 antialiased;
}

@media (prefers-color-scheme: dark) {
  body {
    @apply bg-neutral-950 text-neutral-100;
  }
}

/* An untagged note's fill is GENERATED from its id, not chosen from the palette —
 * see `derivedFill` in notes/colors.ts for why nine keys was never going to be
 * enough. That means it cannot be a Tailwind class, and it cannot be a plain inline
 * style either: light and dark are two different computed colours and an inline
 * style has no way to answer a media query. So the card publishes both as custom
 * properties and this rule picks between them.
 *
 * The fallbacks are the draft case. A note with no id yet has nothing to hash, so it
 * publishes no properties and lands on the plain card surface — one colour change at
 * save time, rather than every draft sharing a fill and then changing anyway. */
.note-tint {
  background-color: var(--tint-light, #ffffff);
}

@media (prefers-color-scheme: dark) {
  .note-tint {
    background-color: var(--tint-dark, #171717);
  }
}

/* Motion is a feature, not a given. Anyone whose OS says "reduce motion" has told
 * us something about vestibular comfort or attention, and the answer is to arrive
 * instantly rather than to animate faster.
 *
 * Global and blunt on purpose: it catches every Tailwind `transition` utility
 * already scattered through the components, and it will catch the M7 motion work
 * without each new component having to remember. Near-zero rather than `none` so
 * `transitionend`/`animationend` listeners still fire and no state machine that
 * waits on them can hang. JS-driven motion can't be reached from CSS — that reads
 * the same preference through `useReducedMotion`. */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Controls that a card or row reveals on hover — the note toolbar, the drag grip,
 * per-item delete buttons. Marked with this class rather than expressed inline,
 * because the rule below is the whole reason they need naming.
 *
 * A finger cannot hover. On a device with no hover at all these are not "harder to
 * reach", they are unreachable — and for a note card the hover toolbar is the ONLY
 * way to pin, colour or archive. So where hovering is impossible they are simply
 * always present. `@media (hover: none)` asks the device directly, which is more
 * honest than inferring it from viewport width: a small window on a laptop still
 * hovers, and a large tablet still doesn't.
 *
 * Placed after the Tailwind directives so it wins on source order against the
 * `opacity-0` / `pointer-events-none` utilities it overrides, without !important.
 * The `group-hover:` reveal stays in the markup — the trigger differs per component
 * (named groups), only this fallback is shared. */
@media (hover: none) {
  .hover-reveal {
    opacity: 1;
    pointer-events: auto;
  }
}

/* A note card's own controls — the drag grip and the pin/colour/archive/trash set.
 * ONE element each, in TWO placements, because "always visible" and "floating over
 * the card's top corners" cannot both be true without the controls sitting on top of
 * the note's own words.
 *
 * That is exactly what a phone got. `.hover-reveal` above made the pills permanent
 * where nothing can hover (task 2697, correctly — they are the only way to pin or
 * archive), but they were still absolutely positioned, so they covered the title:
 * "thought sync tauri app" rendered as "ught sync tauri app" with the grip parked on
 * the first three characters.
 *
 * So the default — no hover — is a footer row IN FLOW, which cannot overlap anything
 * by construction. A pointer that can hover lifts them back out into the floating
 * pills they have always been, where they cost no vertical space and appear only on
 * approach. `display: contents` drops the flex row itself out of the way so each
 * child positions against the card.
 *
 * Keyed on hover rather than width, for the reason `.hover-reveal` already gives: a
 * narrow window on a laptop still hovers, and a wide tablet still doesn't. */
.note-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.125rem;
  margin-top: 0.5rem;
}
.note-grip {
  /* Pushes the action set to the far edge, so the two read as opposite ends of a
   * footer rather than as a clump. */
  margin-right: auto;
}
.note-actions-set {
  position: relative; /* the colour popover anchors here in both placements */
}

@media (hover: hover) {
  .note-actions {
    display: contents;
  }
  .note-grip {
    position: absolute;
    left: 0.375rem;
    top: 0.375rem;
    z-index: 10;
    margin-right: 0;
  }
  .note-actions-set {
    position: absolute;
    right: 0.375rem;
    top: 0.375rem;
  }
}

/* The per-card colour popover, anchored to whichever end of the card the action set
 * currently occupies: it opens DOWNWARD from a floating top-corner pill, and UPWARD
 * from a footer row, so in both cases it grows into the card rather than off it. */
.note-swatches {
  position: absolute;
  right: 0;
  bottom: 100%;
  margin-bottom: 0.375rem;
  z-index: 20;
}
@media (hover: hover) {
  .note-swatches {
    top: 100%;
    bottom: auto;
    margin-top: 0.375rem;
    margin-bottom: 0;
  }
}

/* Board motion (M7). Defined once here rather than three times in BoardView's
 * markup, because "how the board moves" is one idea even though the pinned, other
 * and non-board grids are three TransitionGroups.
 *
 * Vue's TransitionGroup does the FLIP itself: it measures each card before and
 * after the list changes and transitions the difference away. All we supply is the
 * curve. Deliberately fast and small — the brief is continuity, so a card should
 * read as having MOVED rather than as having performed.
 *
 * Leavers are NOT taken out of flow with `position: absolute`, which is the usual
 * TransitionGroup trick: this masonry is CSS multi-column, and an absolutely
 * positioned child escapes its column to the container's origin — it would fly
 * across the board on its way out. Keeping them in flow costs a small settle when
 * the element is finally removed, so the leave is the shortest of the three.
 *
 * Reduced motion needs no special case here: the global guard above already
 * collapses every duration, so this degrades to an instant cut. */
.board-move {
  transition: transform 220ms cubic-bezier(0.2, 0, 0, 1);
}
.board-enter-active {
  transition:
    opacity 180ms ease-out,
    transform 180ms cubic-bezier(0.2, 0, 0, 1);
}
.board-leave-active {
  transition: opacity 120ms ease-in;
}
.board-enter-from {
  opacity: 0;
  /* Barely a scale — enough to read as arriving, not as zooming. */
  transform: scale(0.98);
}
.board-leave-to {
  opacity: 0;
}

/* Editor open/close (M7). The backdrop only fades; the panel scales from the point
 * the card occupied, which is what carries "this card became the editor" without
 * the distortion a true card→panel scale would put through the text.
 *
 * Enter is slower than leave on purpose: arriving wants to be noticed as a
 * connection, leaving just wants to be out of the way. LEAVE_MS in NoteEditor.vue
 * must stay in step with the leave duration here — it waits that long before
 * telling its host to unmount it. */
.editor-enter-active {
  transition: opacity 200ms ease-out;
}
.editor-leave-active {
  transition: opacity 140ms ease-in;
}
.editor-enter-from,
.editor-leave-to {
  opacity: 0;
}
.editor-enter-active .editor-panel {
  transition: transform 200ms cubic-bezier(0.2, 0, 0, 1);
}
.editor-leave-active .editor-panel {
  transition: transform 140ms ease-in;
}
.editor-enter-from .editor-panel,
.editor-leave-to .editor-panel {
  transform: scale(0.94);
}

/* Lens cross-fade (M7). Only fires between genuinely different surfaces; the
 * board's own lenses share a component and reflow in place instead. Out is quicker
 * than in so the gap between them stays short — `mode="out-in"` means the two
 * durations are additive, and anything slower starts to feel like waiting. */
.lens-enter-active {
  transition: opacity 150ms ease-out;
}
.lens-leave-active {
  transition: opacity 100ms ease-in;
}
.lens-enter-from,
.lens-leave-to {
  opacity: 0;
}

@layer components {
  .icon-btn {
    @apply rounded-md p-1.5 text-neutral-500 transition hover:bg-black/5 focus:outline-none
      focus-visible:ring-2 focus-visible:ring-brand dark:text-neutral-400 dark:hover:bg-white/10;
  }
  /* Finger-sized where a finger is the input. p-1.5 around an 18px icon lands near
   * 30px — comfortable for a cursor, too small for a thumb (Android asks 48dp,
   * WCAG 2.2 AAA asks 44px). Scoped to coarse pointers so desktop chrome doesn't
   * inflate; inline-flex because a bare min-height would leave the icon off-centre. */
  @media (pointer: coarse) {
    .icon-btn {
      @apply inline-flex min-h-[2.75rem] min-w-[2.75rem] items-center justify-center;
    }
  }
  /* A small action sitting beside a chip on a card — reminder Done/snooze today.
   * Quiet at rest so a board full of reminders doesn't read as a wall of buttons,
   * and it earns contrast on hover/focus. */
  .chip-btn {
    @apply rounded-full px-2 py-0.5 text-xs text-neutral-500 transition hover:bg-black/5
      hover:text-neutral-800 focus:outline-none focus-visible:ring-2 focus-visible:ring-brand
      dark:text-neutral-400 dark:hover:bg-white/10 dark:hover:text-neutral-100;
  }
  /* Same finger rule as .icon-btn: comfortable for a cursor is too small for a
   * thumb, and these are the primary action on a due note. */
  @media (pointer: coarse) {
    .chip-btn {
      @apply inline-flex min-h-[2.25rem] items-center justify-center px-3;
    }
  }
  .nav-link {
    @apply flex items-center gap-2 rounded-lg px-3 py-2 font-medium text-neutral-600 transition
      hover:bg-neutral-200/60 focus:outline-none focus-visible:ring-2 focus-visible:ring-brand
      dark:text-neutral-300 dark:hover:bg-neutral-800;
  }
  .nav-link-active {
    @apply bg-neutral-200 text-neutral-900 dark:bg-neutral-800 dark:text-neutral-100;
  }
}