/* The swap slip — the brand. A two-part (or three-part, for rings) ticket stub joined by a
   perforated seam with the balance stamp in it. Markup: core/components/swap-slip.inc.
   --slip-notch must match whatever the slip sits on (default: the page paper). */

.slip {
  --slip-notch: var(--paper);
  --seam: 2rem;
  --notch: .8rem;
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--seam) minmax(0, 1fr);
  background: var(--surface);
  border-radius: var(--r-slip);
  box-shadow: var(--shadow-slip);
  color: var(--ink);
  isolation: isolate;
}
.slip.is-ring { grid-template-columns: minmax(0, 1fr) var(--seam) minmax(0, 1fr) var(--seam) minmax(0, 1fr); }
.on-surface .slip, .slip.on-surface { --slip-notch: var(--surface); box-shadow: 0 0 0 1px var(--line); }

/* stubs */
.slip-stub { padding: 1.15rem 1.35rem 1.25rem; min-width: 0; display: flex; flex-direction: column; gap: .2rem; }
.slip-stub:first-child { border-radius: var(--r-slip) 0 0 var(--r-slip); }
.slip-stub:last-child { border-radius: 0 var(--r-slip) var(--r-slip) 0; }
.slip-stub.is-theirs { background: var(--stub-soft); }
.slip-stub.is-middle { background: var(--mist-2); }
.slip-label { font-weight: 700; font-size: var(--fs-0); color: var(--ink-2); display: flex; align-items: center; gap: .4rem; }
.slip-title { font-family: var(--font-display); font-weight: 800; font-size: var(--fs-3); line-height: 1.15; font-stretch: 92%; margin: .1rem 0 0; overflow-wrap: anywhere; }
.slip-detail { color: var(--ink-2); font-weight: 700; font-size: var(--fs-0); }
.slip-value { font-family: var(--font-display); font-weight: 800; font-size: var(--fs-4); line-height: 1; margin-top: auto; padding-top: .55rem; font-variant-numeric: tabular-nums lining-nums; }
.slip-who { display: flex; align-items: center; gap: .45rem; color: var(--ink-2); font-size: var(--fs-0); font-weight: 700; margin-top: .45rem; }
.slip-who .avatar { width: 1.75rem; height: 1.75rem; font-size: .9375rem; }
.slip-mode { display: inline-flex; align-items: center; gap: .25rem; }
.slip-mode .ic { width: 1rem; height: 1rem; }

/* the perforated seam: notches top & bottom + a dashed line */
.slip-seam { position: relative; display: grid; place-items: center; }
.slip-seam::before { /* dashed perforation */
  content: ""; position: absolute; top: calc(var(--notch) + .3rem); bottom: calc(var(--notch) + .3rem); left: 50%; width: 2px; transform: translateX(-50%);
  background: repeating-linear-gradient(to bottom, var(--line) 0 .45rem, transparent .45rem .8rem);
}
.slip-seam::after { /* notches: two half-circles punched from the top and bottom edges */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(circle at 50% 0, var(--slip-notch) calc(var(--notch) - .5px), transparent var(--notch)) top / 100% var(--notch) no-repeat,
    radial-gradient(circle at 50% 100%, var(--slip-notch) calc(var(--notch) - .5px), transparent var(--notch)) bottom / 100% var(--notch) no-repeat;
}
.slip-seam-mine { background: linear-gradient(to right, var(--surface) 50%, var(--stub-soft) 50%); }
.slip-seam.to-middle { background: linear-gradient(to right, var(--surface) 50%, var(--mist-2) 50%); }
.slip-seam.from-middle { background: linear-gradient(to right, var(--mist-2) 50%, var(--stub-soft) 50%); }

/* the stamp: balance readout, vertical in the seam */
.slip-stamp {
  position: relative; z-index: 1; writing-mode: vertical-rl; transform: rotate(180deg);
  font-family: var(--font-display); font-weight: 800; font-size: var(--fs-0); line-height: 1; letter-spacing: .01em;
  padding: .6rem .3rem; border-radius: 6px; background: var(--stub); color: var(--ink); white-space: nowrap;
  box-shadow: 0 0 0 2px var(--surface);
}
.slip-stamp.is-close { background: var(--surface); color: var(--warn); box-shadow: 0 0 0 2px var(--warn); }
.slip-stamp.is-uneven { background: var(--surface); color: var(--ink-2); box-shadow: 0 0 0 2px var(--ink-2); }

/* footer line under the slip: suggestion, code, score */
.slip-meta { display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: center; margin-top: .7rem; color: var(--ink-2); font-size: var(--fs-0); font-weight: 700; }
.slip-suggestion { display: flex; gap: .45rem; align-items: flex-start; margin-top: .7rem; padding: .6rem .85rem; border-radius: var(--r-btn); background: var(--warn-bg); color: #5A3B00; font-weight: 700; font-size: var(--fs-0); }
.slip-suggestion .ic { width: 1.1rem; height: 1.1rem; margin-top: .1rem; }

/* linked slip: the title carries the link, stretched over the whole slip */
.slip-link { color: inherit; text-decoration: none; }
.slip-link::after { content: ""; position: absolute; inset: 0; border-radius: var(--r-slip); z-index: 2; }
.slip-link:hover { color: inherit; text-decoration: underline; text-decoration-thickness: 2px; }
.slip-link:focus-visible { outline: none; }
.slip-link:focus-visible::after { outline: 3px solid var(--teal); outline-offset: 3px; }
.slip:has(.slip-link:hover) { box-shadow: 0 1px 0 var(--line), 0 14px 28px -14px rgba(15, 34, 51, .45); }

/* sizes */
.slip-lg .slip-stub { padding: 1.5rem 1.75rem 1.6rem; }
.slip-lg .slip-title { font-size: var(--fs-4); }
.slip-lg .slip-value { font-size: var(--fs-5); }
.slip-lg { --seam: 2.5rem; --notch: 1rem; }
.slip-lg .slip-stamp { font-size: var(--fs-1); padding: .8rem .4rem; }
.slip-sm .slip-stub { padding: .85rem 1rem .95rem; }
.slip-sm .slip-title { font-size: var(--fs-2); }
.slip-sm .slip-value { font-size: var(--fs-3); }

/* stacked: phones (pairs) and narrow screens (rings) — the seam turns horizontal */
@media (max-width: 575.98px) {
  .slip, .slip.is-ring { grid-template-columns: 1fr; grid-template-rows: auto; }
  .slip-stub:first-child { border-radius: var(--r-slip) var(--r-slip) 0 0; }
  .slip-stub:last-child { border-radius: 0 0 var(--r-slip) var(--r-slip); }
  .slip-seam { height: var(--seam); }
  .slip-seam::before { top: 50%; bottom: auto; left: calc(var(--notch) + .3rem); right: calc(var(--notch) + .3rem); width: auto; height: 2px; transform: translateY(-50%);
    background: repeating-linear-gradient(to right, var(--line) 0 .45rem, transparent .45rem .8rem); }
  .slip-seam::after { inset: 0;
    background:
      radial-gradient(circle at 0 50%, var(--slip-notch) calc(var(--notch) - .5px), transparent var(--notch)) left / var(--notch) 100% no-repeat,
      radial-gradient(circle at 100% 50%, var(--slip-notch) calc(var(--notch) - .5px), transparent var(--notch)) right / var(--notch) 100% no-repeat; }
  .slip-seam-mine { background: linear-gradient(to bottom, var(--surface) 50%, var(--stub-soft) 50%); }
  .slip-seam.to-middle { background: linear-gradient(to bottom, var(--surface) 50%, var(--mist-2) 50%); }
  .slip-seam.from-middle { background: linear-gradient(to bottom, var(--mist-2) 50%, var(--stub-soft) 50%); }
  .slip-stamp { writing-mode: horizontal-tb; transform: none; padding: .3rem .6rem; }
}
@media (min-width: 576px) and (max-width: 899.98px) {
  .slip.is-ring { grid-template-columns: 1fr; }
  .slip.is-ring .slip-stub:first-child { border-radius: var(--r-slip) var(--r-slip) 0 0; }
  .slip.is-ring .slip-stub:last-child { border-radius: 0 0 var(--r-slip) var(--r-slip); }
  .slip.is-ring .slip-seam { height: var(--seam); }
  .slip.is-ring .slip-seam::before { top: 50%; bottom: auto; left: calc(var(--notch) + .3rem); right: calc(var(--notch) + .3rem); width: auto; height: 2px; transform: translateY(-50%);
    background: repeating-linear-gradient(to right, var(--line) 0 .45rem, transparent .45rem .8rem); }
  .slip.is-ring .slip-seam::after { inset: 0;
    background:
      radial-gradient(circle at 0 50%, var(--slip-notch) calc(var(--notch) - .5px), transparent var(--notch)) left / var(--notch) 100% no-repeat,
      radial-gradient(circle at 100% 50%, var(--slip-notch) calc(var(--notch) - .5px), transparent var(--notch)) right / var(--notch) 100% no-repeat; }
  .slip.is-ring .slip-seam.to-middle { background: linear-gradient(to bottom, var(--surface) 50%, var(--mist-2) 50%); }
  .slip.is-ring .slip-seam.from-middle { background: linear-gradient(to bottom, var(--mist-2) 50%, var(--stub-soft) 50%); }
  .slip.is-ring .slip-stamp { writing-mode: horizontal-tb; transform: none; padding: .3rem .6rem; }
}

/* the one orchestrated moment (hero): halves slide together, the stamp lands — 600 ms */
@media (prefers-reduced-motion: no-preference) {
  .slip-animate .slip-stub:first-child { animation: slip-in-left .42s cubic-bezier(.2, .8, .2, 1) both; }
  .slip-animate .slip-stub:last-child { animation: slip-in-right .42s cubic-bezier(.2, .8, .2, 1) both; }
  .slip-animate .slip-stamp { animation: slip-stamp .22s cubic-bezier(.3, 1.4, .5, 1) .38s both; }
}
@keyframes slip-in-left { from { transform: translateX(-1.5rem); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes slip-in-right { from { transform: translateX(1.5rem); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes slip-stamp { from { transform: rotate(180deg) scale(1.9); opacity: 0; } to { transform: rotate(180deg) scale(1); opacity: 1; } }
@media (max-width: 575.98px) {
  @keyframes slip-stamp { from { transform: scale(1.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }
}