/* ==========================================================================
   Paper & Ink: the shared motion desk (#126, epic #125)
   --------------------------------------------------------------------------
   One physical motion language for every hand-authored sheet: paper moves
   (tips, lifts, presses, unfurls, settles) and ink appears (draws, dries,
   stamps). Linked root-absolute (/motion.css) from the six hand-authored
   pages; the generated atlas/gallery arrive in Sub 5.

   Byte-safe by construction: this styles the LIVE DOM only. The determinism
   contract protects the SVG string and committed files, never the rendered
   page (see epic #125). No src/, no chart bytes, no golden.
   ========================================================================== */

:root {
  /* Durations: paper is quick (160-340ms), ink ceremonies are slow (500ms+). */
  --paper-quick: 180ms;   /* press, lift, nav underline, term tip */
  --paper: 260ms;         /* standard settle */
  --paper-settle: 340ms;  /* larger arrivals */
  --unfurl: 650ms;        /* the long rolled map opening (pinned cards, panels) */
  --unfurl-quick: 400ms;  /* the same curve at ~60%, for hover previews */
  --ink-draw: 1200ms;     /* a stroke drawing itself (the coastline) */
  --ink-dry: 1200ms;      /* a wash or ink drying in */
  --turn: 900ms;          /* the weighty sheet turn: same world, new dress (#131).
                             Read by sheet-turn.js's WAAPI. */
  --verso-turn: 1200ms;   /* the heavier, ceremonial flip to read the chart's back
                             (#116). Slower than a style re-dress on purpose: turning
                             the whole sheet over is the bigger gesture. CSS transition. */

  /* #170 The redraft grade: the Sub 8 inset inking itself in. Deliberately SHORTER
     than the once-per-draw world arrival (--ink-draw/--ink-dry 1200ms): a redraft
     fires on every settle, so its ceremony must read as a quick fine-pen pass, not
     the full drafting moment. The dry waits stagger the newly labeled names by tier
     (towns first, villages after), both past the inset's 200ms crossfade so a name
     never dries onto a sheet that is still translucent. */
  --redraft-draw: 600ms;           /* the region coastline inking in */
  --redraft-dry: 450ms;            /* the wash + a newly labeled name drying */
  --redraft-dry-wait: 260ms;       /* towns (and any rarer higher tier) start here */
  --redraft-dry-wait-village: 500ms; /* villages follow the towns */
  --redraft-dry-wait-hamlet: 740ms;  /* #171 hamlets, the smallest places, dry in last */
  --glide: 300ms;         /* #170 the voiced zoom glide (buttons, +/- keys, 0 home).
                             Read lazily by app.js and handed to the zoom controller;
                             reduced motion bypasses it entirely (instant baseline). */

  /* Easings: paper settles (ease-out, no bounce); the unfurl starts stiff and
     flexes just past flat, per the ratified one ruled exception. */
  --ease-paper: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-unfurl: cubic-bezier(0.66, 0, 0.2, 1.03);
  --ease-turn: cubic-bezier(0.62, 0, 0.34, 1);  /* the page heaves over: a weighty
                             ease-in-out, slow at both edges of the turn. */

  --iron-red: #7a1f12;    /* the site's ink red (hunt star, status) */
}

/* --------------------------------------------------------------------------
   Keyframe vocabulary. Authored here as the shared foundation (epic #125);
   Subs 2-6 attach these to their elements (charts, cards, chronicle dots,
   soundings). They render nothing on their own in Sub 1; a consuming sub may
   tune the exact stops when it wires one up.
   -------------------------------------------------------------------------- */

/* Paper settles onto the desk: rises into place with a faint rotate and a small
   overshoot past flat, then rests. (#127: the Explorer chart arrival and the
   staggered atlas plates. Tuned from Sub 1's placeholder by its first consumer.) */
@keyframes paperSettle {
  from { opacity: 0; transform: translateY(16px) rotate(0.9deg); }
  70%  { opacity: 1; transform: translateY(-2px) rotate(-0.15deg); }
  to   { opacity: 1; transform: translateY(0) rotate(0); }
}

/* Ink draws itself along a stroke. The consumer sets --draw-len (the path's total
   length) and a matching stroke-dasharray inline, then removes both on animationend
   to restore the pristine stroke. (#127: the coastline. Later: the voyage track.) */
@keyframes inkDraw {
  from { stroke-dashoffset: var(--draw-len, 0); }
  to   { stroke-dashoffset: 0; }
}

/* A wash dries in behind the drawn ink: fill-opacity rises from bare paper to full.
   (#127: the land wash settling in behind the coastline.) */
@keyframes washDry {
  from { fill-opacity: 0; }
  to   { fill-opacity: 1; }
}

/* Ink stamped down: it appears and presses to size. (Subs 3-4: dots, marks.) */
@keyframes inkStamp {
  from { opacity: 0; transform: scale(1.35); }
  60%  { opacity: 1; }
  to   { opacity: 1; transform: scale(1); }
}

/* The long roll opens: a rolled sheet tips down stiff from its anchored edge,
   swings just past flat, flexes back, then settles (Alex's ruled dramatic unfurl,
   2026-07-04). Self-perspective lives in the transform so a consumer needs no
   perspective on an ancestor; the consumer sets transform-origin to the anchored
   edge (top when the sheet hangs below its anchor, bottom when it sits above).
   Pair with --ease-unfurl and --unfurl (or --unfurl-quick on hover). (#128: the
   place card's inner sheet and the scrubber panel.) */
@keyframes paperUnfurl {
  from { opacity: 0; transform: perspective(900px) rotateX(-62deg); }
  72%  { opacity: 1; transform: perspective(900px) rotateX(7deg); }
  to   { opacity: 1; transform: perspective(900px) rotateX(0); }
}

/* Ink drying: the stroke appears, then deepens to full. (Sub 2: the coast.) */
@keyframes dryingInk {
  from { opacity: 0; }
  45%  { opacity: 0.85; }
  to   { opacity: 1; }
}

/* A sounding ripple spreads and fades. (Sub 4: the daily sounding.) */
@keyframes inkRipple {
  from { opacity: 0.55; transform: scale(0.2); }
  to   { opacity: 0; transform: scale(1); }
}

/* --------------------------------------------------------------------------
   Universal press and lift. Every button and action-styled link rises under
   the hand and presses on the tap (the touch twin ships in the same rule).

   CAREFUL: the Explorer's .place-hit overlay reset is load-bearing and asserted
   by e2e (idle transparent background + zero border, suite-cards P2/P3). It is
   a <button>, so it MUST be excluded here or its :hover would inherit the lift
   and shadow. The `:not(.place-hit)` exclusion is guarded by suite-cards P2c.
   -------------------------------------------------------------------------- */
button:not(.place-hit),
.card,
.actions a,
.action-link {
  transition: transform var(--paper-quick) var(--ease-paper),
              box-shadow var(--paper-quick) var(--ease-paper);
}
button:not(.place-hit):hover,
.actions a:hover,
.action-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgb(61 47 31 / 0.2);
}
button:not(.place-hit):active,
.actions a:active,
.action-link:active {
  transform: translateY(1px);
  box-shadow: 0 1px 3px rgb(61 47 31 / 0.14);
}
/* Cards lift a touch further and keep their own deeper resting shadow line. */
.card:hover  { transform: translateY(-3px); box-shadow: 0 14px 30px rgb(61 47 31 / 0.2); }
.card:active { transform: translateY(1px);  box-shadow: 0 4px 12px rgb(61 47 31 / 0.12); }

/* --------------------------------------------------------------------------
   The nav menu. Links lift under the hand, a hairline iron-red underline draws
   in from the left, and a tap presses (the touch twin). Present on all six
   pages via .topnav.
   -------------------------------------------------------------------------- */
.topnav a {
  display: inline-block;
  position: relative;
  text-decoration: none;
  transition: transform var(--paper-quick) var(--ease-paper);
}
.topnav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--iron-red);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--paper-quick) var(--ease-paper);
}
.topnav a:hover              { transform: translateY(-2px); }
.topnav a:active             { transform: translateY(0); }
.topnav a:hover::after,
.topnav a:focus-visible::after,
.topnav a:active::after      { transform: scaleX(1); }

/* --------------------------------------------------------------------------
   Homepage chart plates. They rest FLAT and tip + lift under the hand, the same
   gesture as the Explorer's bound atlas plates (#146) and the generated
   atlas/gallery shelves (#130): straight at rest, a small tip on hover, so every
   chart surface on the site reacts to the hand the same way (Alex, 2026-07-06).
   -------------------------------------------------------------------------- */
.plate {
  transition: transform var(--paper) var(--ease-paper),
              box-shadow var(--paper) var(--ease-paper);
}
.plate:hover {
  transform: translateY(-5px) rotate(-0.6deg);
  box-shadow: 0 20px 44px rgb(61 47 31 / 0.28);
}
.plate:active { transform: translateY(-1px) rotate(0deg); }

/* --------------------------------------------------------------------------
   The folio (#130, epic #125). Navigating Vellum reads as turning through one
   bound folio: cross-document View Transitions give every same-origin page swap
   a quiet sheet crossfade with a small 6px slide, the leaf that is leaving
   lifting away as the one arriving settles down. Pure CSS, zero JS, no router
   (ratified call D): Chromium and Safari get the folio feel; Firefox and any
   engine without cross-document support keep today's instant loads, which is
   the fallback. Both the old and new document must opt in -- all six hand-
   authored pages link this file, and Sub 5 adds the same link to the generated
   gallery/atlas templates so the shelves join the folio too (ratified call C,
   knowingly relaxing the convention that site-wide changes skip generated pages).
   These view-transition pseudo-elements live on their own tree, so the universal
   `*` reduced-motion collapse below does NOT reach them; the folio is turned off
   explicitly there instead (navigation: none).
   -------------------------------------------------------------------------- */
@view-transition { navigation: auto; }

::view-transition-old(root) { animation: folioLeave var(--paper) var(--ease-paper) both; }
::view-transition-new(root) { animation: folioArrive var(--paper) var(--ease-paper) both; }
@keyframes folioLeave  { to   { opacity: 0; transform: translateY(-6px); } }
@keyframes folioArrive { from { opacity: 0; transform: translateY(6px); } }

/* --------------------------------------------------------------------------
   Every gesture has a still twin. This ONE block collapses all motion to
   instant end states: the gestures above, the page-CSS gestures (glossary
   term tip), AND the two pre-existing animations retrofitted into the doctrine
   (the seed-of-the-day hunt star, the Explorer chronicle-strip fade). The
   universal duration collapse reaches any animation/transition site-wide (every
   chart surface now rests flat, so there is no static resting transform left to
   flatten); and the nested @view-transition turns the folio off (the pseudo-
   element tree the `*` rule cannot reach).
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    animation-delay: 0s !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
    scroll-behavior: auto !important;
  }
  @view-transition { navigation: none; }
}