Inland Letter

<div class="sig-inland-letter" data-shut="Close">
  <p class="sig-inland-letter__message">Dear Amma, reached safely. The job is good. Will come for Pongal.</p>
  <button class="sig-inland-letter__cover" type="button" aria-expanded="false">
    <span class="sig-inland-letter__kind">Inland Letter</span>
    <span class="sig-inland-letter__stamp" aria-hidden="true">₹2.50</span>
    <span class="sig-inland-letter__to">To, Amma</span>
    <span class="sig-inland-letter__open" data-word>Open</span>
  </button>
</div>

.sig-inland-letter {
  --sig-paper: #a9c7e8;
  --sig-ink: #1d2f5e;
  --sig-w: 290px;
  --sig-speed: 420ms;
}

.sig-inland-letter {
  position: relative;
  box-sizing: border-box;
  width: var(--sig-w);
  max-width: 100%;
  height: 150px;
  perspective: 700px;
  font-family: Georgia, 'Times New Roman', serif;
  color: var(--sig-ink);
}

.sig-inland-letter[data-state=open] {
  --lift: 76deg;
}

.sig-inland-letter__message {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 14px 16px;
  box-sizing: border-box;
  font-size: 14px;
  line-height: 23px;
  overflow: auto;
  background: repeating-linear-gradient(180deg, transparent 0 22px, color-mix(in srgb, var(--sig-ink) 18%, transparent) 22px 23px), color-mix(in srgb, var(--sig-paper) 45%, #fff);
  border-radius: 2px;
}

.sig-inland-letter__cover {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  padding: 10px 14px;
  color: inherit;
  font: inherit;
  text-align: left;
  background: linear-gradient(180deg, rgba(255,255,255,.2), transparent 12%), var(--sig-paper);
  border: 0;
  border-bottom: 2px dashed color-mix(in srgb, var(--sig-ink) 45%, transparent);
  border-radius: 2px;
  box-shadow: 0 4px 10px rgba(0,0,0,.3);
  cursor: pointer;
  transform-origin: 50% 0;
  transform: rotateX(var(--lift, 0deg));
  transition: transform var(--sig-speed) ease;
}

.sig-inland-letter__cover:focus-visible {
  outline: 2px solid var(--sig-ink);
  outline-offset: -5px;
}

.sig-inland-letter__kind {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.sig-inland-letter__stamp {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 46px;
  height: 54px;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  text-align: center;
  color: var(--sig-paper);
  background: var(--sig-ink);
  outline: 3px dotted color-mix(in srgb, var(--sig-paper) 55%, #fff);
  outline-offset: -2px;
}

.sig-inland-letter__to {
  display: block;
  margin-top: 28px;
  font-size: 15px;
  font-style: italic;
}

.sig-inland-letter__open {
  position: absolute;
  bottom: 8px;
  right: 14px;
  font-size: 11px;
  font-weight: 700;
  font-family: system-ui, sans-serif;
  text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
  .sig-inland-letter__cover {
    animation: none !important;
    transition: none !important;
  }
}

document.querySelectorAll(".sig-inland-letter").forEach((el) => {
  const flap = el.querySelector("[aria-expanded]");
  const word = flap.querySelector("[data-word]");
  const closed = word.textContent;
  const flip = () => {
    const open = flap.getAttribute("aria-expanded") !== "true";
    flap.setAttribute("aria-expanded", String(open));
    el.dataset.state = open ? "open" : "shut";
    word.textContent = open ? el.dataset.shut ?? "" : closed;
  };
  flap.addEventListener("click", flip);
  return () => flap.removeEventListener("click", flip);
});

import { useEffect, useRef } from "react";
import type React from "react";
import "./inland-letter.css"; // the CSS tab

function attach(el: HTMLElement) {
  const flap = el.querySelector("[aria-expanded]") as HTMLElement;
  const word = flap.querySelector("[data-word]") as HTMLElement;
  const closed = word.textContent;
  const flip = () => {
    const open = flap.getAttribute("aria-expanded") !== "true";
    flap.setAttribute("aria-expanded", String(open));
    el.dataset.state = open ? "open" : "shut";
    word.textContent = open ? el.dataset.shut ?? "" : closed;
  };
  flap.addEventListener("click", flip);
  return () => flap.removeEventListener("click", flip);
}

export function SigInlandLetter({ children = "Inland Letter", ...props }: React.ComponentProps<"div">) {
  const ref = useRef<HTMLDivElement>(null);
  useEffect(() => attach(ref.current!), []);

  return (
    <div className="sig-inland-letter" data-shut="Close" ref={ref} {...props}>
      <p className="sig-inland-letter__message">{"Dear Amma, reached safely. The job is good. Will come for Pongal."}</p>
      <button className="sig-inland-letter__cover" type="button" aria-expanded="false">
        <span className="sig-inland-letter__kind">{children}</span>
        <span className="sig-inland-letter__stamp" aria-hidden="true">{"₹2.50"}</span>
        <span className="sig-inland-letter__to">{"To, Amma"}</span>
        <span className="sig-inland-letter__open" data-word>{"Open"}</span>
      </button>
    </div>
  );
}

<div class="sig-inland-letter relative [box-sizing:border-box] w-[290px] [max-width:100%] h-[150px] [perspective:700px] [font-family:Georgia,_'Times_New_Roman',_serif] text-[#1d2f5e] [&[data-state=open]]:[--lift:76deg]" data-shut="Close">
  <p class="absolute [inset:0] [margin:0] [padding:14px_16px] [box-sizing:border-box] text-[14px] [line-height:23px] [overflow:auto] [background:repeating-linear-gradient(180deg,_transparent_0_22px,_color-mix(in_srgb,_#1d2f5e_18%,_transparent)_22px_23px),_color-mix(in_srgb,_#a9c7e8_45%,_#fff)] rounded-[2px]">Dear Amma, reached safely. The job is good. Will come for Pongal.</p>
  <button class="absolute [inset:0] [display:block] w-[100%] [padding:10px_14px] [color:inherit] [font:inherit] [text-align:left] [background:linear-gradient(180deg,_rgba(255,255,255,.2),_transparent_12%),_#a9c7e8] [border:0] [border-bottom:2px_dashed_color-mix(in_srgb,_#1d2f5e_45%,_transparent)] rounded-[2px] [box-shadow:0_4px_10px_rgba(0,0,0,.3)] cursor-pointer [transform-origin:50%_0] [transform:rotateX(var(--lift,_0deg))] [transition:transform_420ms_ease] focus-visible:[outline:2px_solid_#1d2f5e] focus-visible:[outline-offset:-5px] motion-reduce:[transition:none!important]" type="button" aria-expanded="false">
    <span class="[display:block] text-[11px] font-[700] [letter-spacing:0.14em] [text-transform:uppercase]">Inland Letter</span>
    <span class="absolute [top:10px] [right:12px] w-[46px] h-[54px] grid [place-items:center] text-[11px] font-[700] [text-align:center] text-[#a9c7e8] bg-[#1d2f5e] [outline:3px_dotted_color-mix(in_srgb,_#a9c7e8_55%,_#fff)] [outline-offset:-2px]" aria-hidden="true">₹2.50</span>
    <span class="[display:block] [margin-top:28px] text-[15px] [font-style:italic]">To, Amma</span>
    <span class="absolute [bottom:8px] [right:14px] text-[11px] font-[700] [font-family:system-ui,_sans-serif] [text-decoration:underline]" data-word>Open</span>
  </button>
</div>

<!-- Needs the script from the JS tab. -->