:root {
  --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-press: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-fast: 180ms;
  --motion-mid: 320ms;
  --motion-slow: 620ms;
  --surface-glass: rgba(255, 255, 255, 0.68);
  --surface-strong: rgba(255, 255, 255, 0.86);
  --premium-shadow: 0 28px 86px rgba(53, 30, 43, 0.14);
  --premium-shadow-hover: 0 34px 100px rgba(53, 30, 43, 0.2);
  --ring: rgba(211, 49, 116, 0.34);
}

* {
  letter-spacing: 0;
}

html {
  scroll-padding-top: 24px;
}

body {
  background:
    linear-gradient(118deg, rgba(255, 255, 255, 0.92) 0 16%, transparent 16% 100%),
    repeating-linear-gradient(90deg, rgba(90, 41, 66, 0.028) 0 1px, transparent 1px 86px),
    linear-gradient(180deg, #fff7f7 0%, #fffaf4 52%, #f6fbf7 100%);
}

button,
a,
input {
  touch-action: manipulation;
}

button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 4px;
}

.name-control input:focus-visible {
  outline: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 999px;
  color: white;
  background: var(--plum);
  font-weight: 800;
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform var(--motion-fast) var(--ease-soft);
}

.skip-link:focus {
  transform: translateY(0);
}

.soft-wash {
  background:
    radial-gradient(circle at 18% 22%, rgba(239, 199, 104, 0.14), transparent 28%),
    radial-gradient(circle at 82% 4%, rgba(127, 153, 137, 0.12), transparent 24%),
    linear-gradient(115deg, rgba(255, 255, 255, 0.24), transparent 58%);
}

.cursor-light {
  transform: translate3d(var(--cursor-light-x, -50vw), var(--cursor-light-y, -50vh), 0) translate3d(-50%, -50%, 0);
}

.auth-screen,
.letter-hero,
.chapter-card,
.letter-page,
.answer-modal section {
  backdrop-filter: blur(18px);
}

.auth-screen.is-visible .auth-panel {
  animation: panel-arrive 760ms var(--ease-soft) both;
}

.auth-panel {
  border-color: rgba(90, 41, 66, 0.16);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--premium-shadow);
}

.auth-panel h1 {
  color: #371325;
  font-weight: 800;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.44);
}

.auth-panel .kicker {
  color: #a51d50;
}

.name-control {
  border-color: rgba(211, 49, 116, 0.24);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.96);
  transition:
    border-color var(--motion-mid) var(--ease-soft),
    box-shadow var(--motion-mid) var(--ease-soft),
    transform var(--motion-mid) var(--ease-soft);
}

.name-control:focus-within {
  border-color: rgba(211, 49, 116, 0.34);
  outline: 0;
  box-shadow:
    0 0 0 4px rgba(211, 49, 116, 0.1),
    0 22px 58px rgba(211, 49, 116, 0.16);
  transform: translateY(-1px);
}

.name-control input {
  border-radius: inherit;
}

.name-control button,
.primary-action,
.secondary-action,
.progress-nav button {
  position: relative;
  overflow: hidden;
  transition:
    transform var(--motion-fast) var(--ease-press),
    box-shadow var(--motion-mid) var(--ease-soft),
    border-color var(--motion-mid) var(--ease-soft),
    background var(--motion-mid) var(--ease-soft),
    color var(--motion-mid) var(--ease-soft),
    opacity var(--motion-mid) var(--ease-soft);
}

.modal-close {
  overflow: hidden;
  transition:
    transform var(--motion-fast) var(--ease-press),
    box-shadow var(--motion-mid) var(--ease-soft),
    border-color var(--motion-mid) var(--ease-soft),
    background var(--motion-mid) var(--ease-soft),
    color var(--motion-mid) var(--ease-soft),
    opacity var(--motion-mid) var(--ease-soft);
}

.auth-return {
  overflow: visible;
  transition:
    transform var(--motion-fast) var(--ease-press),
    box-shadow var(--motion-mid) var(--ease-soft),
    border-color var(--motion-mid) var(--ease-soft),
    background var(--motion-mid) var(--ease-soft),
    opacity var(--motion-mid) var(--ease-soft);
}

.auth-return:hover {
  border-color: rgba(211, 49, 116, 0.24);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 18px 52px rgba(90, 41, 66, 0.16);
  transform: translateY(-1px);
}

.auth-return:active {
  transform: translateY(0) scale(0.97);
}

.name-control button::after,
.primary-action::after,
.secondary-action::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background: linear-gradient(110deg, transparent 0 28%, rgba(255, 255, 255, 0.36) 48%, transparent 66% 100%);
  transform: translateX(-130%);
  transition: transform 640ms var(--ease-soft);
}

.name-control button:hover,
.primary-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 56px rgba(211, 49, 116, 0.3);
}

.secondary-action:hover,
.progress-nav button:hover,
.modal-close:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 34px rgba(90, 41, 66, 0.12);
}

.name-control button:hover::after,
.primary-action:hover::after,
.secondary-action:hover::after {
  transform: translateX(130%);
}

.name-control button:active,
.primary-action:active,
.secondary-action:active,
.progress-nav button:active,
.modal-close:active {
  transform: translateY(0) scale(0.98);
}

.primary-action[data-loading="true"],
.secondary-action[data-loading="true"] {
  pointer-events: none;
  opacity: 0.72;
}

.primary-action[data-loading="true"] span,
.secondary-action[data-loading="true"] span {
  opacity: 0;
}

.primary-action[data-loading="true"]::before,
.secondary-action[data-loading="true"]::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  margin: -9px 0 0 -9px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  content: "";
  animation: spin 760ms linear infinite;
}

.letter-hero {
  isolation: isolate;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255, 250, 248, 0.92) 0%, rgba(255, 250, 248, 0.76) 45%, rgba(255, 250, 248, 0.18) 100%),
    url("./assets/letter-commissioned-hero.webp") 52% center / cover;
  box-shadow: var(--premium-shadow);
  transform: perspective(1200px) rotateX(var(--tilt-y, 0deg)) rotateY(var(--tilt-x, 0deg));
  transition:
    transform var(--motion-mid) var(--ease-soft),
    box-shadow var(--motion-mid) var(--ease-soft);
}

.letter-hero::before {
  position: absolute;
  inset: 18px;
  z-index: -1;
  content: "";
  pointer-events: none;
  border: 1px solid rgba(90, 41, 66, 0.1);
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.34), rgba(255, 255, 255, 0.08));
}

.letter-hero::after {
  position: absolute;
  right: 32px;
  bottom: 31px;
  width: 72px;
  height: 72px;
  content: "";
  pointer-events: none;
  border: 1px solid rgba(90, 41, 66, 0.14);
  border-radius: 50%;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.52), rgba(255, 255, 255, 0.08)),
    radial-gradient(circle, rgba(211, 49, 116, 0.22), transparent 68%);
  box-shadow: inset 0 0 0 10px rgba(255, 255, 255, 0.16);
}

.letter-hero:hover {
  box-shadow: var(--premium-shadow-hover);
}

.letter-hero .chapter-mark,
.letter-hero h2,
.letter-hero p,
.letter-hero .primary-action,
.progress-nav {
  animation: letter-stagger 760ms var(--ease-soft) both;
}

.letter-hero h2 {
  animation-delay: 70ms;
  text-wrap: balance;
}

.letter-hero p:not(.chapter-mark) {
  animation-delay: 130ms;
}

.letter-hero .primary-action {
  animation-delay: 190ms;
}

.progress-nav {
  animation-delay: 250ms;
}

.progress-nav button {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.62);
}

.progress-nav button.is-active {
  box-shadow:
    0 12px 30px rgba(211, 49, 116, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.38);
}

.progress-nav button.is-active::before {
  position: absolute;
  inset: 7px;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.44);
  border-radius: inherit;
}

.chapter-card,
.letter-page {
  transform:
    perspective(1000px)
    translate3d(0, var(--lift, 0), 0)
    rotateX(var(--tilt-y, 0deg))
    rotateY(var(--tilt-x, 0deg));
  transition:
    opacity var(--motion-slow) var(--ease-soft),
    transform var(--motion-mid) var(--ease-soft),
    box-shadow var(--motion-mid) var(--ease-soft),
    border-color var(--motion-mid) var(--ease-soft);
}

.chapter-card {
  background: var(--surface-glass);
}

.chapter-card:hover {
  --lift: -4px;
  border-color: rgba(211, 49, 116, 0.18);
  box-shadow: var(--premium-shadow-hover);
}

.chapter-card.large {
  background:
    linear-gradient(145deg, rgba(255, 250, 246, 0.9), rgba(255, 255, 255, 0.68));
}

.chapter-card.tall {
  background:
    linear-gradient(150deg, rgba(243, 249, 244, 0.84), rgba(255, 255, 255, 0.66));
}

.commissioned-visual {
  position: relative;
  display: block;
  overflow: hidden;
  margin-top: 18px;
  border: 1px solid rgba(90, 41, 66, 0.12);
  border-radius: 18px;
  box-shadow: 0 20px 48px rgba(47, 32, 41, 0.12);
}

.commissioned-visual::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0.22), transparent 42%);
}

.commissioned-visual img {
  width: 100%;
  height: 190px;
  margin: 0;
  border-radius: 0;
  object-fit: cover;
  transform: scale(1.01);
  transition: transform 900ms var(--ease-soft);
}

.chapter-card.large:hover .commissioned-visual img {
  transform: scale(1.045);
}

.letter-page {
  content-visibility: auto;
  contain-intrinsic-size: 620px;
  background: var(--surface-strong);
}

.letter-page.is-current {
  border-color: rgba(211, 49, 116, 0.2);
  box-shadow: var(--premium-shadow-hover);
}

.promise-page,
.promise-text-page,
.decision-page {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 250, 244, 0.78)),
    linear-gradient(180deg, rgba(241, 247, 242, 0.66), rgba(255, 247, 238, 0.42));
}

.promise-page::after,
.promise-text-page::after,
.decision-page::after {
  position: absolute;
  right: clamp(24px, 5vw, 62px);
  bottom: clamp(24px, 5vw, 54px);
  width: 150px;
  height: 112px;
  content: "";
  pointer-events: none;
  opacity: 0.18;
  border: 1px solid var(--plum);
  border-radius: 14px;
  transform: rotate(-5deg);
  background:
    linear-gradient(26deg, transparent 49%, currentColor 50%, transparent 51%),
    linear-gradient(-26deg, transparent 49%, currentColor 50%, transparent 51%);
  color: var(--plum);
}

.promise-list li {
  transition:
    transform var(--motion-mid) var(--ease-soft),
    border-color var(--motion-mid) var(--ease-soft),
    box-shadow var(--motion-mid) var(--ease-soft);
}

.promise-list li:hover {
  transform: translateX(4px);
  border-color: rgba(211, 49, 116, 0.22);
  box-shadow: 0 12px 32px rgba(90, 41, 66, 0.08);
}

.video-frame,
.poem-card,
.audio-card {
  border: 1px solid rgba(90, 41, 66, 0.12);
}

.video-frame {
  position: relative;
  isolation: isolate;
  background:
    linear-gradient(145deg, rgba(38, 25, 33, 0.72), rgba(38, 25, 33, 0.24)),
    url("./assets/video-poster-letter.webp") center / cover;
}

.video-frame::before {
  position: absolute;
  inset: 14px;
  z-index: 1;
  content: "";
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 18px;
}

.video-frame video {
  position: relative;
  z-index: 0;
  background: transparent;
}

.audio-card {
  transition:
    transform var(--motion-mid) var(--ease-soft),
    box-shadow var(--motion-mid) var(--ease-soft);
}

.audio-card:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 18px 44px rgba(90, 41, 66, 0.12);
}

.answer-modal {
  background:
    radial-gradient(circle at 24% 18%, rgba(255, 156, 196, 0.18), transparent 30%),
    radial-gradient(circle at 78% 76%, rgba(239, 199, 104, 0.1), transparent 32%),
    rgba(47, 32, 41, 0.44);
  transition:
    opacity var(--motion-mid) var(--ease-soft),
    backdrop-filter var(--motion-mid) var(--ease-soft);
}

.message-modal {
  background:
    radial-gradient(circle at 74% 18%, rgba(255, 156, 196, 0.24), transparent 28%),
    radial-gradient(circle at 20% 78%, rgba(239, 199, 104, 0.12), transparent 32%),
    rgba(47, 32, 41, 0.46);
  transition:
    opacity var(--motion-mid) var(--ease-soft),
    backdrop-filter var(--motion-mid) var(--ease-soft);
}

.answer-modal section {
  display: grid;
  gap: 0;
  padding: clamp(34px, 5vw, 44px);
  transform: translateY(18px) scale(0.97);
  opacity: 0;
  transition:
    opacity var(--motion-mid) var(--ease-soft),
    transform var(--motion-mid) var(--ease-soft);
}

.answer-dialog {
  border-color: rgba(255, 255, 255, 0.74);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.97), rgba(255, 250, 246, 0.92)),
    radial-gradient(circle at 16% 0%, rgba(255, 156, 196, 0.12), transparent 36%);
}

.message-dialog {
  overflow: visible;
  border-color: rgba(255, 255, 255, 0.74);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.97), rgba(255, 250, 246, 0.92)),
    radial-gradient(circle at 15% 8%, rgba(255, 156, 196, 0.16), transparent 38%);
  transform: translateY(20px) scale(0.96);
  opacity: 0;
  transition:
    opacity var(--motion-mid) var(--ease-soft),
    transform var(--motion-mid) var(--ease-soft);
}

.message-modal.is-open .message-dialog {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.message-dialog .message-close {
  position: absolute !important;
  top: 22px;
  right: 22px;
  left: auto !important;
  display: grid;
  place-items: center;
}

.message-dialog::before {
  position: absolute;
  top: 0;
  right: clamp(24px, 4vw, 34px);
  left: clamp(24px, 4vw, 34px);
  height: 5px;
  border-radius: 0 0 999px 999px;
  content: "";
  background: linear-gradient(90deg, rgba(211, 49, 116, 0.18), rgba(238, 118, 94, 0.68), rgba(239, 199, 104, 0.28));
}

@media (max-height: 620px) {
  .message-dialog {
    overflow: auto;
  }
}

.message-field textarea {
  transition:
    border-color var(--motion-mid) var(--ease-soft),
    box-shadow var(--motion-mid) var(--ease-soft),
    background var(--motion-mid) var(--ease-soft);
}

.message-field textarea:hover {
  background: rgba(255, 255, 255, 0.9);
}

.answer-modal .modal-close {
  position: absolute !important;
  top: 18px;
  right: 18px;
  left: auto !important;
  z-index: 2;
  display: grid;
  place-items: center;
}

.answer-modal .chapter-mark {
  padding-right: 0;
}

.answer-modal.is-open section {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.reveal {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
}

.reveal.is-visible {
  opacity: 1;
  transform:
    perspective(1000px)
    translate3d(0, var(--lift, 0), 0)
    rotateX(var(--tilt-y, 0deg))
    rotateY(var(--tilt-x, 0deg));
}

.chapter-grid .reveal:nth-child(2) {
  transition-delay: 40ms;
}

.chapter-grid .reveal:nth-child(3) {
  transition-delay: 80ms;
}

.chapter-grid .reveal:nth-child(4) {
  transition-delay: 120ms;
}

.chapter-grid .reveal:nth-child(5) {
  transition-delay: 160ms;
}

.chapter-grid .reveal:nth-child(6) {
  transition-delay: 200ms;
}

@keyframes panel-arrive {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.98);
  }

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

@keyframes letter-stagger {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (max-width: 980px) {
  .letter-hero {
    background:
      linear-gradient(180deg, rgba(255, 250, 248, 0.88) 0%, rgba(255, 250, 248, 0.62) 52%, rgba(255, 250, 248, 0.2) 100%),
      url("./assets/letter-commissioned-hero.webp") 42% center / cover;
  }

  .letter-hero::after {
    right: 22px;
    bottom: 20px;
    width: 54px;
    height: 54px;
  }

  .commissioned-visual img {
    height: 210px;
  }

  .promise-page::after,
  .promise-text-page::after,
  .decision-page::after {
    width: 104px;
    height: 78px;
  }
}

@media (max-width: 520px) {
  .site-shell {
    padding: 14px;
  }

  .auth-panel,
  .letter-page {
    border-radius: 22px;
  }

  .letter-hero {
    min-height: 560px;
    border-radius: 24px;
  }

  .progress-nav {
    gap: 4px;
  }

  .progress-nav button {
    min-width: 44px;
    padding: 0;
  }

  .promise-list li:hover {
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal.is-visible,
  .letter-hero,
  .chapter-card,
  .letter-page,
  .answer-modal section,
  .message-dialog,
  .name-control button,
  .primary-action,
  .secondary-action,
  .progress-nav button,
  .promise-list li,
  .commissioned-visual img {
    animation: none !important;
    transition-duration: 0.01ms !important;
    transform: none !important;
  }
}