02Bottom sheet

<main class="stage is-demo">
  <button class="trigger" type="button">View options</button>
  <div class="overlay"></div>
  <div class="sheet" role="dialog" aria-modal="true" aria-labelledby="t2">
    <div class="sheet__handle"></div>
    <h2 id="t2">Delivery options</h2>
    <p>Choose same-day, next-day, or standard delivery.</p>
    <button class="sheet__close" type="button">Close</button>
  </div>
</main>

@use "../../../../site/static/demo-tokens" as *;

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-base;      // 시트가 올라오는 시간
$easing: $ease-out;        // 관성 없이 딱 멈춘다
$color: $subject-ink;      // 강조색(손잡이·버튼)

@include stage($stage-yellow);

.stage { position: relative; }

.trigger {
  border: 0; border-radius: $r-pill;
  padding: clamp(10px, 3.4vmin, 14px) clamp(20px, 7vmin, 30px);
  font-weight: 600;
  font-size: clamp(13px, 4vmin, 16px);
  line-height: 1;
  font-family: inherit;
  color: $stage-paper; background: $subject-ink;
  cursor: pointer; -webkit-tap-highlight-color: transparent;
}

.overlay {
  position: fixed; inset: 0;
  background: rgba($stage-ink, .5);
  opacity: 0; pointer-events: none;
  transition: opacity $duration $easing;
}

.sheet {
  position: fixed; left: 50%; bottom: 0; top: auto;
  transform: translate(-50%, 100%);
  width: min(94vw, 320px);
  max-height: 62%;
  box-sizing: border-box;
  padding: clamp(10px, 4vmin, 18px) clamp(14px, 5vmin, 22px);
  border-radius: $r-card $r-card 0 0;
  background: $stage-paper; color: $stage-ink;
  box-shadow: $shadow-raised;
  pointer-events: none;
  transition: transform $duration $easing;

  h2 { margin: 8px 0 4px; font-size: clamp(13px, 4.2vmin, 17px); }
  p  { margin: 0 0 10px; font-size: clamp(10px, 3.2vmin, 13px); color: rgba($stage-ink, .65); }
}

.sheet__handle {
  width: 36px; height: 4px; margin: 0 auto;
  border-radius: $r-pill; background: rgba($stage-ink, .25);
}

.sheet__close {
  border: 0; border-radius: $r-control; background: $color; color: $stage-paper;
  padding: clamp(7px, 2.6vmin, 9px) clamp(14px, 4.6vmin, 18px);
  font-weight: 600;
  font-size: clamp(11px, 3.4vmin, 13px);
  line-height: 1;
  font-family: inherit;
  cursor: pointer;
}

.stage.is-open .overlay { opacity: 1; pointer-events: auto; }
.stage.is-open .sheet   { transform: translate(-50%, 0); pointer-events: auto; }

.stage.is-demo .overlay { animation: overlay-loop $dur-loop ease-in-out infinite; }
.stage.is-demo .sheet   { animation: sheet-loop $dur-loop $easing infinite; }

@keyframes overlay-loop {
  0%   { opacity: 0; }
  15%  { opacity: 1; }
  70%  { opacity: 1; }
  85%  { opacity: 0; }
  100% { opacity: 0; }
}
@keyframes sheet-loop {
  0%   { transform: translate(-50%, 100%); }
  15%  { transform: translate(-50%, 0); }
  70%  { transform: translate(-50%, 0); }
  85%  { transform: translate(-50%, 100%); }
  100% { transform: translate(-50%, 100%); }
}

@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .overlay, .stage.is-demo .sheet { animation: none; }
  .overlay, .sheet { transition-duration: 1ms; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.stage {
  position: relative;
}

.trigger {
  border: 0;
  border-radius: 999px;
  padding: clamp(10px, 3.4vmin, 14px) clamp(20px, 7vmin, 30px);
  font-weight: 600;
  font-size: clamp(13px, 4vmin, 16px);
  line-height: 1;
  font-family: inherit;
  color: #ffffff;
  background: #17141a;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(23, 20, 26, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms ease-out;
}

.sheet {
  position: fixed;
  left: 50%;
  bottom: 0;
  top: auto;
  transform: translate(-50%, 100%);
  width: min(94vw, 320px);
  max-height: 62%;
  box-sizing: border-box;
  padding: clamp(10px, 4vmin, 18px) clamp(14px, 5vmin, 22px);
  border-radius: 16px 16px 0 0;
  background: #ffffff;
  color: #17141a;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  pointer-events: none;
  transition: transform 300ms ease-out;
}
.sheet h2 {
  margin: 8px 0 4px;
  font-size: clamp(13px, 4.2vmin, 17px);
}
.sheet p {
  margin: 0 0 10px;
  font-size: clamp(10px, 3.2vmin, 13px);
  color: rgba(23, 20, 26, 0.65);
}

.sheet__handle {
  width: 36px;
  height: 4px;
  margin: 0 auto;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.25);
}

.sheet__close {
  border: 0;
  border-radius: 12px;
  background: #17141a;
  color: #ffffff;
  padding: clamp(7px, 2.6vmin, 9px) clamp(14px, 4.6vmin, 18px);
  font-weight: 600;
  font-size: clamp(11px, 3.4vmin, 13px);
  line-height: 1;
  font-family: inherit;
  cursor: pointer;
}

.stage.is-open .overlay {
  opacity: 1;
  pointer-events: auto;
}

.stage.is-open .sheet {
  transform: translate(-50%, 0);
  pointer-events: auto;
}

.stage.is-demo .overlay {
  animation: overlay-loop 2s ease-in-out infinite;
}

.stage.is-demo .sheet {
  animation: sheet-loop 2s ease-out infinite;
}

@keyframes overlay-loop {
  0% {
    opacity: 0;
  }
  15% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  85% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
@keyframes sheet-loop {
  0% {
    transform: translate(-50%, 100%);
  }
  15% {
    transform: translate(-50%, 0);
  }
  70% {
    transform: translate(-50%, 0);
  }
  85% {
    transform: translate(-50%, 100%);
  }
  100% {
    transform: translate(-50%, 100%);
  }
}
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .overlay, .stage.is-demo .sheet {
    animation: none;
  }
  .overlay, .sheet {
    transition-duration: 1ms;
  }
}

(function () {
  var stage = document.querySelector('.stage');
  var trigger = document.querySelector('.trigger');
  var overlay = document.querySelector('.overlay');
  var close = document.querySelector('.sheet__close');
  function open() { stage.classList.remove('is-demo'); stage.classList.add('is-open'); }
  function shut() { stage.classList.remove('is-open'); }
  trigger.addEventListener('click', open);
  overlay.addEventListener('click', shut);
  close.addEventListener('click', shut);
  document.addEventListener('keydown', function (e) { if (e.key === 'Escape') shut(); });
})();

import { useState } from "react";
import type { CSSProperties } from "react";
import styles from "./BottomSheet.module.scss";

export type BottomSheetProps = {
  triggerLabel: string;
  title: string;
  description: string;
  closeLabel: string;
  /** 시트가 올라오는 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };

export default function BottomSheet({
  triggerLabel,
  title,
  description,
  closeLabel,
  duration = 300,
  easing = "ease-out",
  color = "#17141a",
}: BottomSheetProps) {
  const [open, setOpen] = useState(false);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.stage} style={vars}>
      <button type="button" className={styles.trigger} onClick={() => setOpen(true)}>
        {triggerLabel}
      </button>
      <div
        className={open ? `${styles.overlay} ${styles.isOpen}` : styles.overlay}
        onClick={() => setOpen(false)}
      />
      <div
        className={open ? `${styles.sheet} ${styles.isOpen}` : styles.sheet}
        role="dialog"
        aria-modal="true"
      >
        <div className={styles.handle} />
        <h2>{title}</h2>
        <p>{description}</p>
        <button type="button" className={styles.close} onClick={() => setOpen(false)}>
          {closeLabel}
        </button>
      </div>
    </div>
  );
}