:root {
  --bg-1: #edf9f4;
  --bg-2: #d8efe7;
  --bg-3: #c9e6db;
  --panel: rgba(255, 253, 249, 0.74);
  --panel-strong: rgba(255, 251, 246, 0.9);
  --line: rgba(106, 71, 48, 0.16);
  --text: #4d3528;
  --muted: rgba(77, 53, 40, 0.76);
  --accent: #7a4d34;
  --accent-2: #9c6644;
  --button-1: #7b4b33;
  --button-2: #a46a45;
  --shadow: 0 24px 48px rgba(112, 149, 133, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Outfit", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.55), transparent 30%),
    radial-gradient(circle at 18% 18%, rgba(173, 224, 206, 0.42), transparent 26%),
    radial-gradient(circle at 85% 18%, rgba(207, 236, 227, 0.54), transparent 24%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2) 58%, var(--bg-3));
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  width: 30rem;
  height: 30rem;
  border-radius: 999px;
  filter: blur(70px);
  pointer-events: none;
  opacity: 0.4;
  z-index: 0;
}

body::before {
  top: -10rem;
  right: -8rem;
  background: rgba(176, 227, 210, 0.55);
  animation: drift 12s ease-in-out infinite alternate;
}

body::after {
  bottom: -12rem;
  left: -8rem;
  background: rgba(214, 237, 228, 0.72);
  animation: drift 14s ease-in-out infinite alternate-reverse;
}

.site-shell {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding:
    max(24px, env(safe-area-inset-top))
    0
    max(56px, env(safe-area-inset-bottom));
}

.countdown-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.page.hidden {
  display: none;
}

.hero-card,
.panel,
.countdown-card {
  backdrop-filter: blur(22px);
  background: linear-gradient(180deg, var(--panel-strong), var(--panel));
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 40px;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
}

.eyebrow,
.panel-kicker {
  margin: 0;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
}

.page-countdown .eyebrow {
  color: rgba(146, 104, 73, 0.84);
  margin-bottom: 10px;
}

.hero-title,
.countdown-title,
.panel h2 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 5.4rem);
  line-height: 1.08;
}

.hero-copy,
.countdown-copy,
.panel p,
.music-tip,
#countdownStatus {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 1rem;
}

.page-countdown #countdownStatus {
  color: rgba(109, 80, 63, 0.72);
  font-size: 0.96rem;
  letter-spacing: 0.08em;
}

.hero-actions,
.countdown-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font: inherit;
  transition: transform 180ms ease, opacity 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: #fffaf5;
  background: linear-gradient(135deg, var(--button-1), var(--button-2));
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 251, 246, 0.52);
  border-color: rgba(122, 77, 52, 0.18);
}

.content-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.flip-shell {
  width: min(100%, calc(100% - 20px));
  min-height: 100vh;
  display: grid;
  place-items: center;
  position: relative;
}

.page-flip-book {
  width: 100%;
}

.flip-book {
  width: min(100%, 960px);
  padding: 18px 0 28px;
}

.flip-book-minimal {
  background: transparent;
  border: 0;
  box-shadow: none;
  backdrop-filter: none;
}

.flip-book-topbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  padding: 0 8px;
}

.flip-progress {
  margin: 0;
  color: rgba(99, 74, 59, 0.68);
  letter-spacing: 0.18em;
  font-size: 0.74rem;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.flip-pages {
  position: relative;
  min-height: 0;
  perspective: 1600px;
}

.flip-lock {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: none;
  place-items: center;
  padding: 24px;
  background: rgba(237, 249, 244, 0.92);
  backdrop-filter: blur(14px);
}

.flip-lock.is-active {
  display: grid;
}

.flip-lock-card {
  width: min(100%, 420px);
  text-align: center;
  display: grid;
  gap: 16px;
}

.flip-lock-title {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1.9rem, 7vw, 2.9rem);
  line-height: 1.25;
  color: #56382b;
}

.flip-lock-copy,
.flip-lock-error {
  margin: 0;
  color: rgba(89, 64, 49, 0.74);
  line-height: 1.8;
}

.flip-lock-form {
  display: grid;
  gap: 12px;
}

.flip-password-input {
  width: 100%;
  min-height: 54px;
  border-radius: 999px;
  border: 1px solid rgba(126, 89, 67, 0.16);
  background: rgba(255, 251, 246, 0.7);
  color: #5d3f31;
  padding: 0 18px;
  font: inherit;
  text-align: center;
}

.flip-password-input:focus {
  outline: 1px solid rgba(123, 75, 51, 0.26);
  outline-offset: 2px;
}

.flip-page {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform-origin: center center;
}

.flip-page.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  position: relative;
  z-index: 3;
}

.flip-page.is-entering-next {
  animation: flipEnterNext 440ms cubic-bezier(0.2, 0.8, 0.24, 1) forwards;
}

.flip-page.is-leaving-next {
  animation: flipLeaveNext 440ms cubic-bezier(0.2, 0.8, 0.24, 1) forwards;
  z-index: 2;
  visibility: visible;
  pointer-events: none;
}

.flip-page.is-entering-prev {
  animation: flipEnterPrev 440ms cubic-bezier(0.2, 0.8, 0.24, 1) forwards;
}

.flip-page.is-leaving-prev {
  animation: flipLeavePrev 440ms cubic-bezier(0.2, 0.8, 0.24, 1) forwards;
  z-index: 2;
  visibility: visible;
  pointer-events: none;
}

.flip-page-inner {
  min-height: calc(100svh - 150px);
  border-radius: 0;
  padding: 8vh 7vw 7vh;
  border: 0;
  background: transparent;
  box-shadow: none;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.flip-page-inner::before {
  content: none;
}

.flip-page-inner::after {
  content: none;
}

.flip-title,
.flip-subtitle {
  margin: 0 0 20px;
  font-family: "Noto Serif SC", serif;
  color: #56382b;
  max-width: 14ch;
}

.flip-title {
  font-size: clamp(2.2rem, 10vw, 4.5rem);
  line-height: 1.18;
}

.flip-subtitle {
  font-size: clamp(1.55rem, 7vw, 2.7rem);
  line-height: 1.34;
}

.flip-text {
  margin: 0 0 16px;
  color: rgba(82, 58, 45, 0.84);
  line-height: 1.92;
  font-size: clamp(0.98rem, 3.9vw, 1.08rem);
  width: min(100%, 32rem);
}

.flip-audio-box {
  margin-top: 26px;
  display: grid;
  gap: 14px;
  width: min(100%, 440px);
  justify-items: center;
}

.flip-page-inner .contact-placeholder,
.flip-page-inner .flip-photo-grid,
.flip-page-inner .flip-player {
  margin-left: 0;
}

.flip-page-inner .contact-placeholder::before {
  content: none;
}

.flip-gesture-tip {
  margin-top: 12px;
  text-align: center;
  color: rgba(100, 73, 58, 0.46);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
}

.flip-controls {
  margin-top: 18px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
}

.flip-controls-minimal {
  gap: 18px;
}

.flip-arrow {
  width: 56px;
  height: 56px;
  border-radius: 999px;
  border: 1px solid rgba(126, 89, 67, 0.16);
  background: rgba(255, 251, 246, 0.52);
  color: #5d3f31;
  cursor: pointer;
  transition: transform 180ms ease, opacity 180ms ease, background 180ms ease;
  position: relative;
}

.flip-arrow-shaft,
.flip-arrow-shaft::before {
  position: absolute;
  content: "";
  display: block;
}

.flip-arrow-shaft {
  left: 50%;
  top: 50%;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.flip-arrow-shaft::before {
  width: 8px;
  height: 8px;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  right: -1px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.flip-arrow-prev .flip-arrow-shaft {
  transform: translate(-50%, -50%) rotate(180deg);
}

.flip-arrow:hover {
  transform: translateY(-1px);
}

.flip-arrow:disabled {
  opacity: 0.46;
  cursor: not-allowed;
  transform: none;
}

.flip-photo-grid {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  width: min(100%, 22rem);
}

.flip-photo-grid .gallery-item {
  margin: 0 auto;
  width: 100%;
}

.flip-photo-grid .gallery-item img {
  aspect-ratio: 4 / 5;
}

.flip-player {
  margin-top: 24px;
  width: min(100%, 28rem);
}

.flip-start-button {
  min-width: 12rem;
}

.story-player-actions-center {
  justify-content: center;
}

@keyframes flipEnterNext {
  from {
    opacity: 0;
    transform: translateX(22px) scale(0.994);
  }

  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes flipLeaveNext {
  from {
    opacity: 1;
    transform: translateX(0) scale(1);
  }

  to {
    opacity: 0;
    transform: translateX(-18px) scale(0.996);
  }
}

@keyframes flipEnterPrev {
  from {
    opacity: 0;
    transform: translateX(-22px) scale(0.994);
  }

  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes flipLeavePrev {
  from {
    opacity: 1;
    transform: translateX(0) scale(1);
  }

  to {
    opacity: 0;
    transform: translateX(18px) scale(0.996);
  }
}

@media (prefers-reduced-motion: reduce) {
  .flip-page.is-entering-next,
  .flip-page.is-leaving-next,
  .flip-page.is-entering-prev,
  .flip-page.is-leaving-prev {
    animation: none;
  }
}

.story-shell {
  width: min(1120px, calc(100% - 32px));
}

.page-story {
  display: grid;
  gap: 24px;
}

.page-story.hidden {
  display: none;
}

.story-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.9fr);
  gap: 24px;
  align-items: stretch;
}

.panel-story-hero,
.panel-message-story,
.panel-story-steps,
.panel-gallery-story,
.panel-audio-story,
.panel-contact-story {
  background: linear-gradient(180deg, rgba(255, 252, 248, 0.92), rgba(246, 252, 248, 0.82));
  border-color: rgba(132, 96, 70, 0.14);
}

.story-hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
}

.story-title {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(2.8rem, 5vw, 4.8rem);
  line-height: 1.12;
  color: #54392b;
}

.story-lead,
.story-paragraph,
.story-audio-status,
.story-frame-copy {
  margin: 0;
  color: rgba(82, 58, 45, 0.82);
  line-height: 1.9;
}

.story-actions,
.story-player-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.story-audio-status {
  font-size: 0.95rem;
}

.story-hero-side {
  display: flex;
}

.story-frame {
  width: 100%;
  min-height: 100%;
  border-radius: 24px;
  padding: 28px;
  border: 1px solid rgba(166, 132, 101, 0.2);
  background:
    linear-gradient(180deg, rgba(245, 251, 247, 0.96), rgba(255, 250, 245, 0.9));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
}

.story-frame-label {
  margin: 0;
  color: rgba(148, 103, 77, 0.82);
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.story-frame-title {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: 1.6rem;
  color: #5a3d2f;
}

.story-message-block {
  display: grid;
  gap: 16px;
}

.story-message-block-wide {
  width: min(100%, 860px);
}

.story-paragraph-emphasis {
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  font-family: "Noto Serif SC", serif;
  color: #56372b;
}

.story-note {
  color: rgba(115, 87, 69, 0.72);
}

.story-step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.story-step-card {
  border-radius: 22px;
  padding: 22px 20px;
  border: 1px solid rgba(164, 128, 100, 0.16);
  background: linear-gradient(180deg, rgba(255, 251, 246, 0.9), rgba(242, 250, 245, 0.78));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.82);
}

.story-step-card h3 {
  margin: 0 0 10px;
  font-size: 1.16rem;
  color: #5a3d2f;
}

.story-step-card p {
  margin: 0;
}

.story-step-index {
  display: inline-block;
  margin-bottom: 14px;
  color: rgba(152, 108, 82, 0.82);
  letter-spacing: 0.16em;
  font-size: 0.78rem;
}

.gallery-grid-story {
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  align-items: stretch;
}

.story-photo-large {
  grid-row: span 2;
}

.story-photo-large img {
  aspect-ratio: 4 / 6;
}

.story-player {
  margin-top: 18px;
}

.story-player audio {
  width: 100%;
}

.contact-placeholder {
  margin-top: 18px;
  min-height: 120px;
  border-radius: 22px;
  border: 1px dashed rgba(156, 113, 86, 0.26);
  background: rgba(255, 250, 245, 0.58);
  display: grid;
  place-items: center;
  gap: 8px;
  text-align: center;
  color: rgba(101, 72, 56, 0.72);
}

.reveal-section {
  scroll-margin-top: 28px;
}

.panel {
  padding: 28px;
}

.panel-message {
  grid-column: span 6;
}

.panel-gallery {
  grid-column: span 6;
}

.panel-music {
  grid-column: span 12;
}

.panel-heading {
  margin-bottom: 16px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.gallery-item {
  margin: 0;
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid rgba(122, 77, 52, 0.12);
  background: rgba(255, 251, 246, 0.5);
}

.gallery-item img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: linear-gradient(135deg, rgba(193, 232, 219, 0.72), rgba(238, 247, 242, 0.94));
}

.gallery-item figcaption {
  padding: 12px 14px 14px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.accent-a img {
  box-shadow: inset 0 0 0 1px rgba(122, 77, 52, 0.1);
}

.accent-b img {
  box-shadow: inset 0 0 0 1px rgba(156, 102, 68, 0.1);
}

.accent-c img {
  box-shadow: inset 0 0 0 1px rgba(109, 149, 132, 0.12);
}

.music-player {
  display: grid;
  gap: 14px;
}

.music-player audio {
  width: 100%;
}

.countdown-card {
  width: min(100%, 960px);
  padding: 42px 32px;
  text-align: center;
  background:
    linear-gradient(180deg, rgba(255, 255, 252, 0.92), rgba(246, 252, 248, 0.82));
  border: 1px solid rgba(163, 130, 94, 0.18);
  box-shadow:
    0 28px 70px rgba(118, 155, 139, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.86);
}

.countdown-card-journal {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
}

.countdown-title {
  font-size: clamp(2.2rem, 4vw, 4.4rem);
  margin-bottom: 16px;
  color: #55372a;
  letter-spacing: 0.03em;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
}

.countdown-copy {
  width: min(100%, 640px);
  margin: 0 auto;
  color: rgba(91, 63, 48, 0.84);
  font-weight: 400;
}

.countdown-board {
  margin: 34px 0 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.time-block {
  min-width: 0;
  padding: 22px 18px;
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 254, 0.9), rgba(243, 251, 247, 0.78));
  border: 1px solid rgba(188, 157, 117, 0.2);
  box-shadow:
    0 14px 28px rgba(141, 176, 161, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  position: relative;
}

.time-block::before {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 18px;
  border: 1px solid rgba(214, 192, 164, 0.36);
  background: linear-gradient(180deg, rgba(222, 244, 235, 0.18), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.time-block::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(202, 171, 132, 0.68), transparent);
}

.time-note {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(224, 243, 236, 0.95), rgba(244, 232, 217, 0.8));
  color: rgba(110, 76, 54, 0.88);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.76);
}

.time-value {
  display: block;
  font-size: clamp(2.6rem, 5vw, 4.6rem);
  line-height: 1;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
  color: #5b3d2f;
}

.time-label {
  display: block;
  margin-top: 12px;
  font-size: 0.95rem;
  color: rgba(98, 72, 57, 0.74);
  letter-spacing: 0.24em;
}

.time-separator {
  display: none;
}

#birthdayAudio {
  accent-color: var(--accent);
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }

  to {
    transform: translate3d(18px, 26px, 0) scale(1.08);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.35;
  }

  50% {
    opacity: 1;
  }
}

@media (min-width: 1440px) {
  .site-shell {
    width: min(1280px, calc(100% - 64px));
  }

  .hero-card {
    min-height: 420px;
    padding: 54px;
  }

  .hero-copy,
  .countdown-copy,
  .panel p,
  .music-tip,
  #countdownStatus {
    font-size: 1.06rem;
  }

  .time-block {
    min-width: 168px;
    padding: 28px 22px;
  }
}

@media (max-width: 900px) {
  .flip-shell {
    width: min(100% - 16px, 980px);
  }

  .story-shell {
    width: min(100% - 24px, 1120px);
  }

  .story-hero,
  .story-step-list,
  .gallery-grid-story {
    grid-template-columns: 1fr;
  }

  .story-photo-large {
    grid-row: auto;
  }

  .site-shell {
    width: min(100% - 24px, 1180px);
  }

  .hero-card {
    padding: 32px 24px;
    min-height: auto;
  }

  .panel-message,
  .panel-gallery,
  .panel-music {
    grid-column: span 12;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .countdown-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .time-block {
    min-width: 0;
  }
}

@media (max-width: 640px) {
  .flip-shell {
    width: min(100% - 16px, 980px);
  }

  .flip-book {
    padding: max(12px, env(safe-area-inset-top)) 0 max(22px, env(safe-area-inset-bottom));
  }

  .flip-book-topbar {
    margin-bottom: 10px;
    padding: 0 4px;
  }

  .flip-book-topbar .panel-kicker {
    font-size: 0.68rem;
    letter-spacing: 0.16em;
  }

  .flip-lock {
    padding: 18px;
  }

  .flip-lock-card {
    gap: 14px;
  }

  .flip-lock-copy,
  .flip-lock-error {
    font-size: 0.94rem;
  }

  .flip-page-inner {
    min-height: auto;
    padding: 4vh 4vw 2vh;
    justify-content: center;
  }

  .flip-pages,
  .flip-page,
  .flip-page.is-active {
    min-height: auto;
  }

  .flip-page {
    position: absolute;
  }

  .flip-page.is-active {
    position: relative;
  }

  .flip-title {
    font-size: 1.92rem;
    max-width: 11ch;
    margin-bottom: 14px;
  }

  .flip-subtitle {
    font-size: 1.34rem;
    max-width: 12ch;
    margin-bottom: 14px;
  }

  .flip-text {
    font-size: 0.94rem;
    line-height: 1.82;
    width: min(100%, 19.5rem);
    margin-bottom: 12px;
  }

  .flip-audio-box {
    width: min(100%, 19.5rem);
    margin-top: 18px;
    gap: 10px;
  }

  .flip-start-button,
  .flip-lock-form .button,
  .story-player-actions-center .button {
    width: 100%;
    min-width: 0;
  }

  .story-audio-status {
    font-size: 0.9rem;
    line-height: 1.7;
    width: min(100%, 19.5rem);
  }

  .flip-photo-grid {
    width: min(100%, 17.5rem);
    margin-top: 8px;
  }

  .flip-photo-grid .gallery-item figcaption {
    font-size: 0.86rem;
  }

  .flip-controls {
    gap: 12px;
    margin-top: 8px;
  }

  .flip-gesture-tip {
    margin-top: 4px;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
  }

  .flip-arrow {
    width: 48px;
    height: 48px;
  }

  .flip-player {
    width: min(100%, 19.5rem);
    margin-top: 16px;
  }

  .flip-player audio {
    width: 100%;
  }

  .story-shell {
    width: min(100% - 16px, 1120px);
  }

  .site-shell {
    width: min(100% - 16px, 1180px);
    padding:
      max(14px, env(safe-area-inset-top))
      0
      max(28px, env(safe-area-inset-bottom));
  }

  .hero-card,
  .panel,
  .countdown-card {
    border-radius: 22px;
  }

  .hero-card,
  .countdown-card {
    padding: 24px 16px;
  }

  .panel {
    padding: 20px 16px;
  }

  .hero-title {
    font-size: 2.15rem;
  }

  .story-title {
    font-size: 2.2rem;
  }

  .story-frame {
    padding: 22px 18px;
  }

  .story-actions,
  .story-player-actions {
    flex-direction: column;
  }

  .story-actions .button,
  .story-player-actions .button {
    width: 100%;
  }

  .story-step-card {
    padding: 18px 16px;
  }

  .story-paragraph-emphasis {
    font-size: 1.45rem;
  }

  .countdown-title {
    font-size: 1.95rem;
    line-height: 1.3;
    margin-bottom: 12px;
  }

  .hero-copy,
  .countdown-copy,
  .panel p,
  .music-tip,
  #countdownStatus,
  .gallery-item figcaption {
    font-size: 0.95rem;
    line-height: 1.7;
  }

  .button {
    width: 100%;
    min-height: 46px;
  }

  .hero-actions,
  .countdown-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .content-grid {
    margin-top: 16px;
    gap: 16px;
  }

  .gallery-grid {
    gap: 12px;
  }

  .countdown-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin: 22px 0 18px;
  }

  .time-block {
    min-width: 0;
    width: 100%;
    padding: 16px 12px;
    border-radius: 18px;
  }

  .time-block::before {
    inset: 7px;
    border-radius: 14px;
  }

  .time-block::after {
    left: 12px;
    right: 12px;
  }

  .time-note {
    margin-bottom: 10px;
    padding: 3px 8px;
    font-size: 0.64rem;
    letter-spacing: 0.12em;
  }

  .time-value {
    font-size: 2.15rem;
  }

  .time-label {
    margin-top: 8px;
    font-size: 0.82rem;
    letter-spacing: 0.14em;
  }
}

@media (max-width: 390px) {
  .flip-page-inner {
    min-height: auto;
    padding: 3.5vh 3.5vw 1.5vh;
  }

  .flip-title {
    font-size: 1.72rem;
  }

  .flip-subtitle {
    font-size: 1.24rem;
  }

  .flip-text {
    width: min(100%, 17.25rem);
    font-size: 0.91rem;
  }

  .flip-audio-box,
  .story-audio-status,
  .flip-player {
    width: min(100%, 17.25rem);
  }

  .flip-photo-grid {
    width: min(100%, 15.75rem);
  }

  .flip-arrow {
    width: 44px;
    height: 44px;
  }

  .site-shell {
    width: min(100% - 12px, 1180px);
  }

  .hero-card,
  .countdown-card,
  .panel {
    border-radius: 18px;
  }

  .hero-title {
    font-size: 1.9rem;
  }

  .countdown-title {
    font-size: 1.7rem;
  }

  .eyebrow,
  .panel-kicker,
  .time-label {
    letter-spacing: 0.14em;
  }

  .countdown-copy {
    font-size: 0.9rem;
  }

  .time-value {
    font-size: 1.95rem;
  }

  .countdown-board {
    gap: 8px;
  }

  .time-block {
    padding: 14px 10px;
    border-radius: 16px;
  }

  .time-note {
    font-size: 0.58rem;
  }
}