/* ============================================================
   BORYUNG — Countdown to 70 (3-step signature)
   모든 레이아웃 수치는 calc(N * var(--u)) = N/360*100vw
   ============================================================ */

:root {
  /* base viewport width — Figma frame width */
  --vw-base: 360;
  /* 1 design unit expressed in vw */
  --u: calc(100vw / var(--vw-base));

  --color-ink: #05051a;
  --color-ink-2: #1b1f2d;
  --color-white: #ffffff;
  --color-white-70: rgba(255, 255, 255, 0.7);
  --color-white-40: rgba(255, 255, 255, 0.4);
  --color-white-20: rgba(255, 255, 255, 0.2);
  --color-white-15: rgba(255, 255, 255, 0.15);
  --color-scrim: rgba(0, 0, 0, 0.4);

  --step-w: calc(360 * var(--u));
  --step-h: calc(768 * var(--u));

  --font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    system-ui, Roboto, "Helvetica Neue", "Segoe UI", "Apple SD Gothic Neo",
    "Noto Sans KR", "Malgun Gothic", sans-serif;

  --ease-out-cubic: cubic-bezier(0.33, 1, 0.68, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--color-ink);
  font-family: var(--font-sans);
  color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100lvh;
  overflow-x: hidden;
  overflow-y: auto;
}

/* ============================================================
   PC cover (width >= 768) — 데스크톱 안내
   PC frame = 1920 base, 모든 수치는 calc(N * var(--pc-u))
   ============================================================ */
.pc-cover {
  display: none;
  position: fixed;
  inset: 0;
  background: #000;
  overflow: hidden;
  z-index: 100;
  /* PC 기준 단위 (1920 → viewport width) */
  --pc-u: calc(100vw / 1920);
}

.pc-cover__bg {
  position: absolute;
  inset: 0;
  background: url("./assets/pc-bg.png") center / cover no-repeat;
  pointer-events: none;
}

.pc-cover__logo {
  position: absolute;
  top: calc(60 * var(--pc-u));
  left: 50%;
  transform: translateX(-50%);
  width: calc(108 * var(--pc-u));
  height: calc(16 * var(--pc-u));
  z-index: 2;
}

.pc-cover__inner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: calc(851 * var(--pc-u));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(24 * var(--pc-u));
  z-index: 2;
}

.pc-hero {
  position: relative;
  width: calc(828 * var(--pc-u));
  height: calc(180 * var(--pc-u));
}

.pc-hero__eyebrow {
  position: absolute;
  top: 0;
  left: 29.9%;
  right: 29.86%;
  height: calc(180 * var(--pc-u) * 0.2081);
}

.pc-hero__eyebrow img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.pc-hero__title {
  position: absolute;
  top: 36.57%;
  bottom: 28.47%;
  left: 0;
  right: 0;
}

.pc-hero__title img {
  width: 100%;
  height: 100%;
  display: block;
}

.pc-hero__subtitle {
  position: absolute;
  top: 88.07%;
  left: 30.18%;
  right: 30.22%;
  bottom: 0;
}

.pc-hero__subtitle img {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.8;
}

.pc-cover__divider {
  width: calc(1 * var(--pc-u));
  height: calc(64 * var(--pc-u));
}

.pc-cover__divider img {
  width: 100%;
  height: 100%;
  display: block;
}

.pc-cover__msg {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(8 * var(--pc-u));
  color: var(--color-white);
  text-align: center;
  white-space: nowrap;
  line-height: 1.5;
}

.pc-cover__msg-title,
.pc-cover__msg-desc {
  margin: 0;
}

.pc-cover__msg-title {
  font-size: calc(32 * var(--pc-u));
  font-weight: 700;
  letter-spacing: calc(-0.32 * var(--pc-u));
}

.pc-cover__msg-desc {
  font-size: calc(24 * var(--pc-u));
  font-weight: 400;
  letter-spacing: calc(-0.24 * var(--pc-u));
}

body.is-pc .pc-cover {
  display: block;
}

body.is-pc .viewport {
  display: none;
}

/* ============================================================
   Viewport + horizontal slider (3 steps)
   ============================================================ */
.viewport {
  width: 100vw;
  min-height: 100lvh;
  height: 100lvh;
  overflow: hidden;
  position: relative;
  background: var(--color-ink);
}

.slider {
  display: flex;
  height: 100%;
  width: calc(var(--step-w) * 3);
  transform: translate3d(0, 0, 0);
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.step {
  position: relative;
  flex: 0 0 var(--step-w);
  height: 100%;
  background: var(--color-ink);
  overflow: hidden;
}

/* ============================================================
   Shared: background image + header logo
   ============================================================ */
.step__bg {
  position: absolute;
  /*top: calc(-336 * var(--u));*/
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100lvh;
  background: url("./assets/bg.png") center / cover no-repeat;
  /*background-size:auto 100%;*/
  pointer-events: none;
}

.step__scrim {
  position: absolute;
  inset: 0;
  background: var(--color-scrim);
  pointer-events: none;
}

.header-logo {
  position: absolute;
  top: calc(40 * var(--u));
  left: 50%;
  transform: translateX(-50%);
  width: calc(81 * var(--u));
  height: calc(12 * var(--u));
  z-index: 3;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  appearance: none;
  border: 0;
  padding: calc(20 * var(--u));
  border-radius: calc(8 * var(--u));
  font-family: inherit;
  font-size: calc(16 * var(--u));
  font-weight: 700;
  letter-spacing: calc(-0.16 * var(--u));
  line-height: 1;
  color: #fff;
  cursor: pointer;
  transition: background-color 0.2s ease, opacity 0.2s ease;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Figma "Background Blur" 효과 재현: 대각 그라디언트 + 강한 backdrop blur +
   상단 하이라이트 + 진한 테두리 + 은은한 외곽 그림자로 뚜렷한 유리 질감을 만든다. */
.btn--glass {
  position: relative;
  background:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.32) 0%,
      rgba(255, 255, 255, 0.14) 55%,
      rgba(255, 255, 255, 0.22) 100%
    );
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.45),
    inset 0 -1px 0 rgba(255, 255, 255, 0.08),
    inset 1px 0 0 rgba(255, 255, 255, 0.12),
    inset -1px 0 0 rgba(255, 255, 255, 0.12),
    0 calc(6 * var(--u)) calc(20 * var(--u)) rgba(0, 0, 0, 0.18);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
}

.btn--glass:hover:not(:disabled) {
  background:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.4) 0%,
      rgba(255, 255, 255, 0.18) 55%,
      rgba(255, 255, 255, 0.28) 100%
    );
  border-color: rgba(255, 255, 255, 0.36);
}

.btn--glass:active:not(:disabled) {
  background:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.22) 0%,
      rgba(255, 255, 255, 0.1) 100%
    );
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.3),
    inset 0 -1px 0 rgba(0, 0, 0, 0.06),
    0 calc(2 * var(--u)) calc(6 * var(--u)) rgba(0, 0, 0, 0.15);
}

/* CTA dock — 슬라이더 밖에서 실제 뷰포트 하단에 고정.
   .slider의 transform이 containing block을 만들기 때문에, 버튼을 슬라이더 안에
   두면 `position: fixed`가 슬라이더 기준으로 계산되어 Step 이동 시 함께 밀린다. */
.cta-dock {
  position: fixed;
  left: calc(20 * var(--u));
  bottom: calc(60 * var(--u));
  width: calc(320 * var(--u));
  z-index: 10;
}

.step-cta {
  display: none;
  width: 100%;
}

body[data-step="1"] .step-cta--intro,
body[data-step="2"] .step-cta--form {
  display: block;
}

body.is-pc .cta-dock {
  display: none;
}

/* ============================================================
   Hero (Countdown to 70 / THE NEXT CHAPTER / subtitle)
   Container = 260 × 157, top:112, centered
   ============================================================ */
.hero {
  position: absolute;
  top: calc(112 * var(--u));
  left: 50%;
  transform: translateX(-50%);
  width: calc(260 * var(--u));
  height: calc(157 * var(--u));
  z-index: 2;
}

/* stagger enter: eyebrow(0s) → title(0.1s) → subtitle(0.2s) */
.hero__eyebrow,
.hero__title,
.hero__subtitle {
  opacity: 0;
  transform: translate3d(0, 20%, 0);
  transition: transform 0.45s var(--ease-out-cubic), opacity 0.4s var(--ease-out-cubic);
}

.hero__eyebrow{ transform:none!important; transition:opacity 0.5s; transition-delay:0.1s; }
.hero__title {
  transition: transform 0.55s var(--ease-out-cubic), opacity 0.5s var(--ease-out-cubic);
  transition-delay: 0.2s;
}

.hero__subtitle {
  transition-delay: 0.5s;
}

.hero__eyebrow {
  position: absolute;
  top: 0;
  left: 12.68%;
  right: 12.75%;
  height: calc(21.74 * var(--u));
  transform: translate3d(0, 25%, 0);
}

.step--intro[aria-hidden="false"] .hero__eyebrow {
  transform: translate3d(0, 0, 0);
  opacity: 1;
}

/* Step 3: 레이아웃이 이미 완성된 상태로 진입. hero는 stagger 없이 즉시 노출 */
.step--done .hero__eyebrow,
.step--done .hero__title,
.step--done .hero__subtitle {
  opacity: 1;
  transform: none;
  transition: none;
}

.hero__eyebrow img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.hero__title {
  position: absolute;
  top: 22.24%;
  bottom: 19.62%;
  left: 0;
  right: 0;
}

.step--intro[aria-hidden="false"] .hero__title {
  transform: translate3d(0, 0, 0);
  opacity: 1;
}

.hero__title img {
  width: 100%;
  height: 100%;
  display: block;
}

.hero__subtitle {
  position: absolute;
  top: 91.12%;
  left: 8.82%;
  right: 9.06%;
  bottom: 0;
}

.step--intro[aria-hidden="false"] .hero__subtitle {
  transform: translate3d(0, 0, 0);
  opacity: 1;
}

.hero__subtitle img {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.8;
}

/* ============================================================
   Step 2: form (name + message)
   ============================================================ */
.form {
  position: absolute;
  top: calc(122 * var(--u));
  left: calc(20 * var(--u));
  width: calc(320 * var(--u));
  display: flex;
  flex-direction: column;
  gap: calc(20 * var(--u));
  z-index: 3;
}

.field {
  display: flex;
  flex-direction: column;
  gap: calc(8 * var(--u));
}

.field__label {
  color: var(--color-white);
  font-size: calc(12 * var(--u));
  font-weight: 700;
  letter-spacing: calc(-0.12 * var(--u));
  line-height: 1;
}

.field__box {
  position: relative;
  background: rgba(255, 255, 255, 0.15);
  border-radius: calc(8 * var(--u));
  padding: calc(20 * var(--u));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.field__input {
  appearance: none;
  border: 0;
  outline: 0;
  padding: 0;
  width: 100%;
  font-family: inherit;
  font-size: calc(16 * var(--u));
  font-weight: 700;
  letter-spacing: calc(-0.16 * var(--u));
  line-height: 1;
  color: var(--color-white);
  background: transparent;
  text-align: left;
}

.field__input::placeholder {
  color: var(--color-white-20);
  font-weight: 700;
}

.field__box--message {
  height: calc(168 * var(--u));
}

.field__input--message {
  display: block;
  height: 100%;
  resize: none;
  line-height: 1.4;
  font-weight: 700;
  overflow: hidden;
  padding-bottom: calc(24 * var(--u));
}

.field__counter {
  position: absolute;
  right: calc(20 * var(--u));
  bottom: calc(20 * var(--u));
  color: var(--color-white-40);
  font-size: calc(12 * var(--u));
  font-weight: 500;
  letter-spacing: calc(-0.12 * var(--u));
  line-height: 1;
  pointer-events: none;
}

/* ============================================================
   Step 3: done
   ============================================================ */
.step--done {
  background:
    linear-gradient(
      270deg,
      #1b1f2d 0%,
      #050510 19.712%,
      #050510 50%,
      #050510 80%,
      #1b1f2d 100%
    );
}

.done__msg {
  position: absolute;
  top: calc(50% + calc(25 * var(--u)));
  left: 50%;
  transform: translate3d(-50%, 20%, 0);
  opacity: 0;
  margin: 0;
  color: var(--color-white);
  font-size: calc(40 * var(--u));
  font-weight: 700;
  letter-spacing: calc(-0.4 * var(--u));
  line-height: 1.3;
  text-align: center;
  white-space: nowrap;
  z-index: 2;
  transition: transform 0.4s ease, opacity 0.4s ease;
  transition-delay: 0.3s;
}

.step--done[aria-hidden="false"]:not(.is-loading) .done__msg {
  transform: translate3d(-50%, 0, 0);
  opacity: 1;
}

/* ============================================================
   Step 3: loading overlay (dim + spinner)
   전송 완료 진입 시 0.4s 동안 표시 후 컨텐츠가 순차 등장
   ============================================================ */
.loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-out-cubic);
  z-index: 5;
}

.step--done.is-loading .loading {
  opacity: 1;
  pointer-events: auto;
}

.loading__spinner {
  width: calc(44 * var(--u));
  height: calc(44 * var(--u));
  border: calc(3 * var(--u)) solid rgba(255, 255, 255, 0.18);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: loadingSpin 0.8s linear infinite;
}

@keyframes loadingSpin {
  to { transform: rotate(360deg); }
}

/* 로딩 중에는 hero는 그대로 노출(레이아웃 완성된 상태), done_msg만 base 숨김 상태 유지 */