:root {
  --bg-color: #0b1325;
  --bg-deep: #060b16;
  --bg-soft: #101a2f;
  --text-main: #e2e8f0;
  --text-sub: #94a3b8;
  --accent-color: #60a5fa;
  --accent-strong: #bfdbfe;
  --panel: rgba(255, 255, 255, 0.05);
  --panel-strong: rgba(17, 28, 49, 0.94);
  --line: rgba(255, 255, 255, 0.10);
  --error: #fda4af;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  --radius-lg: 28px;
  --radius-md: 18px;
  --max-width: 1180px;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  margin: 0;
  color: var(--text-main);
  background:
    radial-gradient(circle at 18% 0%, rgba(96, 165, 250, 0.12), transparent 34%),
    linear-gradient(180deg, var(--bg-color) 0%, #0d172b 55%, var(--bg-color) 100%);
  font-family: "Zen Kaku Gothic New", sans-serif;
  line-height: 1.9;
}

body.modal-open {
  overflow: hidden;
}

button,
input,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 5000;
  padding: 10px 14px;
  color: var(--bg-color);
  background: var(--text-main);
  border-radius: 8px;
  transform: translateY(-160%);
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--header-height);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(11, 19, 37, 0.86);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}

.header-inner {
  width: min(calc(100% - 40px), var(--max-width));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1;
}

.site-logo__main {
  font-family: "Noto Serif JP", serif;
  font-size: 1.14rem;
  letter-spacing: 0.18em;
}

.site-logo__sub {
  margin-top: 7px;
  color: var(--text-sub);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
}

.header-actions {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 22px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header-link {
  position: relative;
  color: var(--text-sub);
  font-size: 0.86rem;
  text-decoration: none;
}

.header-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 100%;
  height: 1px;
  background: var(--accent-color);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.header-link:hover,
.header-link:focus-visible {
  color: var(--text-main);
}

.header-link:hover::after,
.header-link:focus-visible::after {
  transform: scaleX(1);
}

.language-switcher {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px;
  background: rgba(3, 9, 19, 0.72);
  border: 1px solid rgba(147, 197, 253, 0.3);
  border-radius: 999px;
}

.language-switcher__button {
  appearance: none;
  -webkit-appearance: none;
  min-width: 38px;
  min-height: 34px;
  padding: 0 9px;
  color: var(--text-main);
  background: rgba(11, 19, 37, 0.82);
  border: 1px solid rgba(147, 197, 253, 0.16);
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.language-switcher__button[aria-pressed="true"] {
  color: var(--bg-color);
  background: var(--accent-color);
  border-color: rgba(191, 219, 254, 0.78);
}

.language-switcher__button:hover:not([aria-pressed="true"]) {
  color: var(--accent-strong);
  background: rgba(30, 58, 95, 0.72);
  border-color: rgba(147, 197, 253, 0.42);
}

.language-switcher__button:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-height) + 80px) 24px 150px;
  background:
    linear-gradient(180deg, rgba(5, 10, 22, 0.22), rgba(5, 10, 22, 0.54)),
    radial-gradient(circle at 50% 26%, rgba(76, 131, 199, 0.18), transparent 30%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  z-index: 4;
  height: 24%;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--bg-color));
}

.star-field,
.submission-scene__stars {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.8;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.95) 0 1px, transparent 1.5px),
    radial-gradient(circle, rgba(191,219,254,0.9) 0 1px, transparent 1.6px),
    radial-gradient(circle, rgba(255,255,255,0.6) 0 0.8px, transparent 1.3px);
  background-size: 140px 140px, 220px 220px, 90px 90px;
  background-position: 0 0, 44px 70px, 18px 28px;
  animation: starsDrift 30s linear infinite;
}

@keyframes starsDrift {
  to { background-position: 140px 80px, 264px 160px, 108px 86px; }
}

.moon {
  position: absolute;
  top: 17%;
  right: 13%;
  width: clamp(90px, 12vw, 150px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: #d9e7fb;
  box-shadow: 0 0 70px rgba(191, 219, 254, 0.28);
  opacity: 0.82;
}

.moon::after {
  content: "";
  position: absolute;
  inset: -7% 19% 7% -5%;
  border-radius: 50%;
  background: #091225;
}

.sea,
.scroll-guide {
  z-index: 2;
}

.hero__content {
  position: relative;
  z-index: 2;
  width: min(860px, 100%);
  text-align: center;
}

.eyebrow,
.section-heading__en,
.submission-guide__label,
.preview-modal__eyebrow,
.submission-scene__eyebrow {
  margin: 0 0 18px;
  color: var(--accent-color);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.34em;
}

.hero h1 {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(3.1rem, 8vw, 6.8rem);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-indent: 0.16em;
  line-height: 1.25;
  text-shadow: 0 14px 44px rgba(0,0,0,0.48);
}

.hero__copy {
  margin: 32px auto 20px;
  color: var(--accent-strong);
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1rem, 2vw, 1.25rem);
  letter-spacing: 0.06em;
  line-height: 2.1;
}

.hero-actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(100%, 700px);
  margin-inline: auto;
  gap: 12px;
}

.hero-actions .button {
  width: 100%;
  min-width: 0;
  height: 100%;
  padding-inline: 12px;
  text-align: center;
  line-height: 1.45;
}

.publication-status {
  display: flex;
  align-items: center;
  justify-content: center;

  width: fit-content;
  max-width: min(100%, 760px);
  margin: 0 auto 28px;
  padding: 11px 20px;

  color: rgba(232, 241, 255, 0.94);
  background: rgba(8, 18, 37, 0.64);
  border: 1px solid rgba(191, 219, 254, 0.28);
  border-radius: 12px;

  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.7;
  letter-spacing: 0.02em;
  text-align: center;
  overflow-wrap: anywhere;

  box-shadow:
    0 0 18px rgba(96, 165, 250, 0.08),
    inset 0 0 0 1px rgba(255, 255, 255, 0.02);

  backdrop-filter: blur(6px);
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 25px;
  border: 1px solid transparent;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-2px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

.button--primary {
  color: var(--bg-color);
  background: var(--accent-color);
  box-shadow: 0 12px 34px rgba(96, 165, 250, 0.16);
}

.button--primary:hover:not(:disabled) {
  background: #93c5fd;
}

.button--ghost {
  color: var(--text-main);
  background: rgba(255,255,255,0.04);
  border-color: var(--line);
}

.button--ghost:hover:not(:disabled) {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.28);
}

.floating-letter {
  position: absolute;
  z-index: 3;
  width: 72px;
  aspect-ratio: 1.45;
  padding: 7px;
  border: 1px solid rgba(191, 219, 254, 0.26);
  background: rgba(221, 232, 246, 0.12);
  box-shadow: 0 20px 35px rgba(0,0,0,0.18);
  transform: rotate(-8deg);
  backdrop-filter: blur(3px);
  animation: letterFloat 7s ease-in-out infinite;
}

.floating-letter span {
  display: block;
  width: 100%;
  height: 1px;
  margin-top: 10px;
  background: rgba(226, 232, 240, 0.26);
  box-shadow: 0 7px 0 rgba(226, 232, 240, 0.18), 0 14px 0 rgba(226, 232, 240, 0.12);
}

.floating-letter--one {
  top: 28%;
  left: 9%;
}

.floating-letter--two {
  top: 62%;
  right: 12%;
  animation-delay: -2.4s;
  transform: rotate(10deg) scale(0.8);
}

.floating-letter--three {
  top: 72%;
  left: 22%;
  animation-delay: -4.1s;
  transform: rotate(4deg) scale(0.65);
}

@keyframes letterFloat {
  0%, 100% { translate: 0 0; rotate: -2deg; }
  50% { translate: 0 -18px; rotate: 3deg; }
}

.sea {
  position: absolute;
  inset: auto 0 0;
  z-index: 2;
  height: 29%;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(29, 72, 112, 0.15), rgba(4, 10, 21, 0.9));
}

.sea__wave {
  position: absolute;
  left: -10%;
  width: 120%;
  height: 90px;
  border-radius: 50%;
  border-top: 1px solid rgba(147, 197, 253, 0.26);
}

.sea__wave--back {
  top: 18px;
  animation: waveMove 8s ease-in-out infinite;
}

.sea__wave--front {
  top: 54px;
  opacity: 0.6;
  animation: waveMove 6s ease-in-out infinite reverse;
}

@keyframes waveMove {
  0%, 100% { transform: translateX(-2%) scaleY(0.9); }
  50% { transform: translateX(2%) scaleY(1.1); }
}

.scroll-guide {
  position: absolute;
  bottom: 80px;
  z-index: 7;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-sub);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-decoration: none;
}
.turnstile-area {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.scroll-guide__line {
  width: 1px;
  height: 38px;
  background: linear-gradient(var(--accent-color), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { opacity: 0.35; transform: scaleY(0.65); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
}

.section {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 120px 0;
}

.section-heading {
  margin-bottom: 52px;
}

.section-heading h2,
.trust-panel h2 {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1.2rem, 1.3vw, 1.5rem);
  font-weight: 500;
  letter-spacing: 0.1em;
}

.section-heading__description {
  max-width: 700px;
  margin: 18px 0 0;
  color: var(--text-sub);
}

.submission-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1.35fr);
  gap: 34px;
  align-items: start;
}

.submission-guide {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  padding: 34px;
  color: var(--text-sub);
  background: linear-gradient(145deg, rgba(255,255,255,0.065), rgba(255,255,255,0.025));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.submission-guide h3 {
  margin: 0 0 18px;
  color: var(--text-main);
  font-family: "Noto Serif JP", serif;
  font-size: 1.45rem;
  font-weight: 500;
  line-height: 1.7;
}

.submission-facts {
  margin: 28px 0;
}

.submission-facts div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.submission-facts dt {
  color: var(--text-sub);
  font-size: 0.85rem;
}

.submission-facts dd {
  margin: 0;
  color: var(--accent-strong);
  font-family: "Noto Serif JP", serif;
  text-align: right;
}

.privacy-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 18px;
  background: rgba(96, 165, 250, 0.07);
  border: 1px solid rgba(96, 165, 250, 0.18);
  border-radius: 14px;
}

.privacy-note span {
  color: var(--accent-strong);
  font-size: 1.4rem;
}

.section--submission {
  padding-top: 70px;
}

.submission-section-stack {
  width: min(calc(100% - 40px), 860px);
  margin: 0 auto;
  padding: 70px 0 140px;
  filter: drop-shadow(var(--shadow));
}

.submission-section-stack > .section {
  width: 100%;
  margin: 0;
  padding: 0;
}

.submission-section-stack .submission-layout {
  width: 100%;
}

.privacy-note p {
  margin: 0;
  font-size: 0.88rem;
}

.letter-panel {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(17, 28, 49, 0.94), rgba(12, 21, 38, 0.98)),
    repeating-linear-gradient(0deg, transparent 0 42px, rgba(255,255,255,0.02) 43px);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.letter-panel::before {
  content: "";
  position: absolute;
  top: -90px;
  right: -80px;
  width: 230px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.16), transparent 68%);
  pointer-events: none;
}

.letter-panel__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 30px 22px;
  border-bottom: 1px solid var(--line);
}

.letter-panel__header p {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  letter-spacing: 0.08em;
}

.letter-panel__header span {
  display: block;
  margin-top: 3px;
  color: var(--text-sub);
  font-size: 0.76rem;
}

.letter-panel__header .draft-status {
  color: var(--text-sub);
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 0.74rem;
  letter-spacing: 0;
  white-space: nowrap;
}

#submissionForm {
  padding: 34px 30px 36px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.form-field + .form-field--body,
.form-field--body {
  margin-top: 24px;
}

.form-field label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 9px;
  color: var(--text-main);
  font-family: "Noto Serif JP", serif;
}

.field-required,
.field-optional {
  padding: 2px 8px;
  border-radius: 999px;
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 0.64rem;
  letter-spacing: 0.05em;
}

.field-required {
  color: var(--bg-color);
  background: var(--accent-strong);
}

.field-optional {
  color: var(--text-sub);
  border: 1px solid var(--line);
}

input[type="text"],
textarea {
  width: 100%;
  color: var(--text-main);
  background: rgba(3, 9, 19, 0.44);
  border: 1px solid var(--line);
  border-radius: 14px;
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"] {
  height: 52px;
  padding: 0 16px;
}

textarea {
  min-height: 320px;
  padding: 18px;
  line-height: 2;
  resize: vertical;
}

.form-field--manager-message textarea {
  min-height: 110px;
}

input[type="text"]::placeholder,
textarea::placeholder {
  color: #66748a;
}

input[type="text"]:focus,
textarea:focus {
  background: rgba(3, 9, 19, 0.65);
  border-color: rgba(96, 165, 250, 0.75);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.11);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: var(--error);
}

.field-meta {
  min-height: 27px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 6px;
  color: var(--text-sub);
  font-size: 0.74rem;
}

.field-meta p {
  margin: 0;
}

.field-error {
  margin: 5px 0 0;
  color: var(--error);
  font-size: 0.78rem;
  font-weight: 700;
}

.form-load-error {
  margin: 0 0 18px;
}

.rules-box {
  margin-top: 26px;
  padding: 18px;
  background: rgba(255,255,255,0.026);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.check-field {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  align-items: start;
  color: var(--text-sub);
  cursor: pointer;
}

.check-field input {
  width: 18px;
  height: 18px;
  margin: 6px 0 0;
  accent-color: var(--accent-color);
}

.turnstile-sample {
  margin-top: 22px;
  min-height: 76px;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: #f3f5f8;
  color: #253047;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 9px;
}

.turnstile-sample__check {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: white;
  background: #3975d1;
  border-radius: 6px;
  font-weight: 700;
}

.turnstile-sample p,
.turnstile-sample span {
  margin: 0;
}

.turnstile-sample p {
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.5;
}

.turnstile-sample span {
  display: block;
  color: #69748a;
  font-size: 0.7rem;
  line-height: 1.4;
}

.turnstile-sample strong {
  color: #4f5e77;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.sample-notice {
  margin: 14px 0 0;
  color: var(--text-sub);
  font-size: 0.76rem;
}

.form-actions {
  margin-top: 30px;
  display: flex;
  justify-content: flex-end;
  gap: 14px;
}

.section--letter-search,
.section--faq {
  padding: 0;
}

.letter-search-section,
.faq-section {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(17, 28, 49, 0.94), rgba(12, 21, 38, 0.98)),
    repeating-linear-gradient(0deg, transparent 0 42px, rgba(255,255,255,0.02) 43px);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent-color);
  border-top: 0;
  border-radius: 0;
  box-shadow: none;
}

.letter-search-section-summary,
.faq-section-summary,
.contact-section-summary,
.faq-question {
  list-style: none;
}

.letter-search-section-summary::-webkit-details-marker,
.faq-section-summary::-webkit-details-marker,
.contact-section-summary::-webkit-details-marker,
.faq-question::-webkit-details-marker {
  display: none;
}

.letter-search-section-summary,
.faq-section-summary,
.contact-section-summary {
  position: relative;
  min-height: 76px;
  display: flex;
  align-items: center;
  padding: 22px 64px 22px 30px;
  font-family: "Noto Serif JP", serif;
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.2s ease;
  caret-color: transparent;
  user-select: none;
}

.letter-search-section-summary:hover,
.faq-section-summary:hover,
.contact-section-summary:hover {
  background: rgba(255,255,255,0.035);
}

.letter-search-section-summary::after,
.faq-section-summary::after,
.contact-section-summary::after {
  content: "+";
  position: absolute;
  right: 30px;
  color: var(--accent-strong);
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 1.35rem;
  line-height: 1;
}

.letter-search-section[open] > .letter-search-section-summary,
.faq-section[open] > .faq-section-summary,
.contact-section[open] > .contact-section-summary {
  border-bottom: 1px solid var(--line);
}

.letter-search-section[open] > .letter-search-section-summary::after,
.faq-section[open] > .faq-section-summary::after,
.contact-section[open] > .contact-section-summary::after {
  content: "−";
}

.letter-search-section-summary:focus-visible,
.faq-section-summary:focus-visible,
.contact-section-summary:focus-visible,
.faq-question:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: -4px;
}

.letter-search-section-content {
  padding: 26px 30px 34px;
}

.letter-search-introduction {
  margin: 0 0 22px;
  color: var(--text-sub);
  font-size: 0.82rem;
}

.letter-search-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.letter-search-actions {
  margin-top: 24px;
  display: flex;
  justify-content: flex-end;
}

.letter-search-status,
.letter-search-error {
  margin-bottom: 0;
  white-space: pre-line;
}

.letter-search-status {
  min-height: 1.7em;
  margin-top: 16px;
  color: var(--text-sub);
  font-size: 0.78rem;
}

.faq-section-content {
  padding: 26px 30px 34px;
}

.faq-introduction,
.faq-status {
  color: var(--text-sub);
  font-size: 0.82rem;
}

.faq-introduction {
  margin: 0 0 22px;
}

.faq-status {
  margin: 0;
  white-space: pre-line;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  overflow: hidden;
  background: rgba(3, 9, 19, 0.28);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.faq-question {
  position: relative;
  min-height: 62px;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 24px;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  cursor: pointer;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.faq-toggle {
  color: var(--accent-strong);
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1;
  text-align: center;
}

.faq-toggle::before {
  content: "+";
}

.faq-item[open] .faq-toggle::before {
  content: "−";
}

.faq-badge {
  width: 28px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  color: var(--bg-color);
  background: var(--accent-strong);
  border-radius: 50%;
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  line-height: 1;
}

.faq-answer {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  margin: 0 16px;
  padding: 18px 0 22px 18px;
  color: var(--text-sub);
  border-top: 1px solid var(--line);
}

.faq-answer-content {
  min-width: 0;
  overflow-wrap: anywhere;
  line-height: 1.9;
}

.faq-answer-content p {
  margin: 0;
  white-space: pre-line;
}

.faq-answer-content p + p {
  margin-top: 1em;
}

.faq-answer-content a {
  color: var(--accent-strong);
  text-decoration: underline;
  text-decoration-color: rgba(191, 219, 254, 0.55);
  text-underline-offset: 0.18em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.faq-answer-content a:hover {
  color: var(--text-main);
  text-decoration-color: currentColor;
}

.faq-answer-content a:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
  border-radius: 2px;
}

.section--trust {
  padding: 0;
}

.trust-panel {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0;
  text-align: left;
  background:
    linear-gradient(180deg, rgba(17, 28, 49, 0.94), rgba(12, 21, 38, 0.98)),
    repeating-linear-gradient(0deg, transparent 0 42px, rgba(255,255,255,0.02) 43px);
  border: 1px solid var(--line);
  border-top: 0;
  border-left: 4px solid var(--accent-color);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: none;
}

.contact-section-content {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  padding: 34px 30px 36px;
}

.contact-section-content .button {
  align-self: flex-end;
}

.trust-panel .section-heading__en {
  margin-bottom: 3px;
  color: var(--text-sub);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.trust-panel h2 {
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.trust-panel h2 + p {
  max-width: none;
  margin: 18px 0 0;
  color: var(--text-sub);
  font-size: 0.76rem;
}

.submission-section-stack .letter-panel {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: none;
}

.site-footer {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 28px 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-sub);
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
}

.site-footer a {
  color: var(--text-main);
  font-family: "Noto Serif JP", serif;
  text-decoration: none;
  letter-spacing: 0.16em;
}

.site-footer__copyright {
  margin: 0;
  white-space: nowrap;
}

.site-footer__pending-count {
  margin-left: 0.25em;
  font-size: 0.9em;
  opacity: 0.72;
}

.letter-search-modal {
  width: min(720px, calc(100% - 30px));
  max-height: 88svh;
  padding: 0;
  overflow: hidden;
  color: var(--text-main);
  background: linear-gradient(145deg, rgba(17, 28, 49, 0.99), rgba(8, 15, 29, 0.99));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: scale(0.95) translateY(12px);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.letter-search-modal.is-visible {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.letter-search-modal::backdrop {
  background: rgba(0,0,0,0.76);
  backdrop-filter: blur(8px);
}

.letter-search-modal__inner {
  max-height: 88svh;
  display: flex;
  flex-direction: column;
}

.letter-search-modal__header {
  flex: 0 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 28px 20px;
  border-bottom: 1px solid var(--line);
}

.letter-search-modal__header h2 {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 500;
}

.letter-search-results {
  min-height: 0;
  display: grid;
  gap: 14px;
  padding: 24px 28px 28px;
  overflow-y: auto;
}

.letter-search-result {
  padding: 18px 20px;
  background: rgba(3, 9, 19, 0.34);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.letter-search-result__id-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.letter-search-result p {
  margin: 0;
  overflow-wrap: anywhere;
}

.letter-search-result p + p {
  margin-top: 8px;
}

.letter-search-result__label {
  color: var(--text-sub);
}

.letter-search-copy-button {
  flex: 0 0 auto;
  padding: 5px 10px;
  color: var(--accent-strong);
  background: rgba(96, 165, 250, 0.08);
  border: 1px solid rgba(191, 219, 254, 0.2);
  border-radius: 7px;
  font-size: 0.72rem;
  cursor: pointer;
}

.letter-search-copy-button:hover,
.letter-search-copy-button:focus-visible {
  background: rgba(96, 165, 250, 0.16);
  border-color: rgba(191, 219, 254, 0.38);
}

.preview-modal {
  width: min(780px, calc(100% - 30px));
  max-height: 88svh;
  padding: 0;
  overflow: hidden;
  color: var(--text-main);
  background: linear-gradient(145deg, rgba(17, 28, 49, 0.99), rgba(8, 15, 29, 0.99));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: scale(0.95) translateY(12px);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.preview-modal.is-visible {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.preview-modal::backdrop {
  background: rgba(0,0,0,0.76);
  backdrop-filter: blur(8px);
}

.preview-modal__inner {
  max-height: 88svh;
  display: flex;
  flex-direction: column;
}

.preview-modal__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 28px 20px;
  border-bottom: 1px solid var(--line);
}

.preview-modal__header h2 {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 500;
}

.modal-close {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  color: var(--text-main);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.35rem;
}

.letter-preview {
  margin: 26px 28px 0;
  padding: 34px;
  overflow-y: auto;
  color: #233047;
  background:
    linear-gradient(rgba(250, 247, 239, 0.97), rgba(239, 235, 224, 0.97)),
    repeating-linear-gradient(0deg, transparent 0 34px, rgba(35, 48, 71, 0.05) 35px);
  border-radius: 16px;
  box-shadow: inset 0 0 0 1px rgba(35,48,71,0.08);
}

.letter-preview__to,
.letter-preview__sender {
  font-family: "Noto Serif JP", serif;
}

.letter-preview__to {
  margin: 0 0 24px;
  color: #68758a;
  font-size: 0.86rem;
}

.letter-preview h3 {
  margin: 0 0 24px;
  font-family: "Noto Serif JP", serif;
  font-size: 1.45rem;
  font-weight: 600;
}

.letter-preview__body {
  min-height: 180px;
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-family: "Noto Serif JP", serif;
  line-height: 2.15;
}

.letter-preview__sender {
  margin: 30px 0 0;
  text-align: right;
}

.letter-preview__manager-message {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(35, 48, 71, 0.18);
}

.letter-preview__manager-label {
  margin: 0 0 8px;
  color: #68758a;
  font-size: 0.78rem;
  font-weight: 700;
}

#previewMessageToManager {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.8;
}

.preview-modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 14px;
  padding: 22px 28px 28px;
}

.submission-scene {
  position: fixed;
  inset: 0;
  z-index: 4000;
  display: grid;
  place-items: center;
  overflow: hidden;
  visibility: hidden;
  opacity: 0;
  background:
    radial-gradient(circle at 50% 20%, rgba(70, 125, 190, 0.18), transparent 30%),
    linear-gradient(180deg, #071020, #050914);
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.submission-scene.is-active {
  visibility: visible;
  opacity: 1;
}

.submission-scene__content {
  position: relative;
  z-index: 3;
  width: min(760px, calc(100% - 34px));
  text-align: center;
}

.envelope {
  position: relative;
  width: 150px;
  aspect-ratio: 1.45;
  margin: 0 auto 36px;
  background: #dce8f7;
  border-radius: 4px;
  box-shadow: 0 22px 55px rgba(0,0,0,0.38), 0 0 45px rgba(147,197,253,0.12);
  transform: rotate(-4deg);
}

.envelope::before,
.envelope::after {
  content: "";
  position: absolute;
  inset: 0;
  border-style: solid;
}

.envelope::before {
  border-width: 52px 75px;
  border-color: transparent #c7d7eb #b5c9e2 #c7d7eb;
}

.envelope::after {
  border-width: 52px 75px;
  border-color: #e8f0fb transparent transparent transparent;
  transform-origin: top;
}

.envelope__flap {
  position: absolute;
  inset: 0;
}

.submission-scene.is-sending .envelope {
  animation: envelopeSail 2.2s ease-in-out forwards;
}
.field-label-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 9px;
}

.field-label-row label {
  margin-bottom: 0;
}

.field-help-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 12px;

  color: #f7a9d8;
  background: rgba(43, 1, 35, 0.12);
  border: 1px solid rgba(234, 109, 209, 0.48);
  border-radius: 999px;

  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;

  box-shadow: 0 0 14px rgba(245, 158, 11, 0.08);

  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.field-help-button:hover,
.field-help-button:focus-visible {
  color: #fff3c4;
  background: rgba(245, 158, 11, 0.2);
  border-color: rgba(251, 191, 36, 0.8);
  box-shadow: 0 0 18px rgba(245, 158, 11, 0.18);
  transform: translateY(-1px);
}

.letter-rules-modal {
  width: min(760px, calc(100% - 30px));
  max-height: 82svh;
  padding: 0;
  color: var(--text-main);
  background:
    linear-gradient(
      145deg,
      rgba(17, 28, 49, 0.99),
      rgba(8, 15, 29, 0.99)
    );
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: scale(0.95) translateY(12px);
  transition:
    opacity 0.28s ease,
    transform 0.28s ease;
}

.letter-rules-modal.is-visible {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.letter-rules-modal::backdrop {
  background: rgba(0, 0, 0, 0.76);
  backdrop-filter: blur(8px);
}

.letter-rules-modal__inner {
  max-height: 82svh;
  display: flex;
  flex-direction: column;
}

.letter-rules-modal__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 28px 20px;
  border-bottom: 1px solid var(--line);
}

.letter-rules-modal__header h2 {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 500;
}

.letter-rules-modal__eyebrow {
  margin: 0 0 6px;
  color: var(--accent-color);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
}

.letter-rules-modal__content {
  padding: 26px 28px 34px;
  overflow-y: auto;
  color: var(--text-sub);
}

.letter-guidelines > p {
  margin: 0 0 20px;
}

.letter-guidelines ul {
  margin: 0 0 24px;
  padding-left: 1.5em;
}

.letter-guidelines li + li {
  margin-top: 10px;
}

.letter-rules-modal__loading,
.letter-rules-modal__error {
  margin: 0;
  text-align: center;
}

.letter-rules-modal__error {
  color: var(--error);
}

@keyframes envelopeSail {
  0% { transform: translateY(0) rotate(-4deg) scale(1); opacity: 1; }
  55% { transform: translateY(-35px) rotate(4deg) scale(0.92); opacity: 1; }
  100% { transform: translateY(220px) rotate(-7deg) scale(0.55); opacity: 0; }
}

.submission-scene__status {
  margin: 0;
  color: var(--accent-strong);
  font-family: "Noto Serif JP", serif;
  letter-spacing: 0.08em;
}

.submission-scene__result[hidden] {
  display: none;
}

.submission-scene__result h2 {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  font-weight: 500;
  line-height: 1.6;
}

.submission-scene__result > p:not(.submission-scene__eyebrow) {
  margin: 18px 0 30px;
  color: var(--text-sub);
}
.field-label-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 9px;
}

.field-label-row label {
  margin-bottom: 0;
}


.submission-sea {
  position: absolute;
  inset: auto 0 0;
  z-index: 2;
  height: 32%;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(96,165,250,0.2), transparent 36%),
    linear-gradient(180deg, rgba(13, 50, 87, 0.46), rgba(3, 8, 17, 0.97));
}
.hero-watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(72vw, 760px);
  height: auto;

  transform: translate(-50%, -50%);

  opacity: 0.13;
  mix-blend-mode: screen;

  pointer-events: none;
  user-select: none;

  z-index: 1;
}
.submission-sea::before,
.submission-sea::after {
  content: "";
  position: absolute;
  top: 18px;
  left: -10%;
  width: 120%;
  height: 80px;
  border-top: 1px solid rgba(147, 197, 253, 0.35);
  border-radius: 50%;
  animation: waveMove 7s ease-in-out infinite;
}

.submission-sea::after {
  top: 54px;
  opacity: 0.5;
  animation-direction: reverse;
  animation-duration: 5s;
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

::selection {
  color: var(--text-main);
  background: rgba(96, 165, 250, 0.35);
}

.field-note {
  display: block;
  margin-top: 6px;
  color: var(--text-sub);
  font-size: 0.9rem;
  font-weight: 400;
  line-height: 1.7;
}

.field-note--multiline > span {
  display: block;
}

@media (max-width: 900px) {
  .header-actions {
    gap: 14px;
  }

  .header-nav {
    gap: 14px;
  }

  .header-link {
    font-size: 0.78rem;
  }

  .submission-layout {
    grid-template-columns: 1fr;
  }

  .submission-guide {
    position: static;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

  .field-row .form-field + .form-field {
    margin-top: 8px;
  }
}

@media (max-width: 760px) {
  .header-nav {
    display: none;
  }
}

@media (max-width: 620px) {
  :root {
    --header-height: 68px;
  }
  .hero-watermark {
    width: 110vw;
    opacity: 0.1;
  }
  .header-inner,
  .section,
  .site-footer {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .header-actions {
    margin-left: auto;
  }

  .submission-section-stack {
    width: min(calc(100% - 28px), 860px);
    padding: 88px 0;
  }

  .header-link {
    display: none;
  }

  .header-nav {
    display: none;
  }

  .language-switcher__button {
    min-width: 40px;
    min-height: 38px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    width: min(100%, 320px);
    margin-inline: auto;
    gap: 10px;
  }

  .hero-actions .button {
    width: 100%;
    min-width: 0;
    min-height: 50px;
    padding-inline: 16px;
    text-align: center;
    line-height: 1.45;
  }

  .hero {
    padding-inline: 16px;
  }

  .hero h1 {
    font-size: clamp(2.8rem, 15vw, 4.6rem);
    letter-spacing: 0.08em;
    text-indent: 0.08em;
  }

  .hero__copy br {
    display: none;
  }

  .publication-status {
    width: 100%;
    max-width: 100%;
    padding: 10px 14px;

    font-size: 0.86rem;
    line-height: 1.65;
    border-radius: 12px;
  }

  .moon {
    top: 16%;
    right: -6%;
  }

  .floating-letter--one {
    left: -18px;
  }

  .floating-letter--two {
    right: -24px;
  }

  .section {
    padding: 88px 0;
  }

  .section-heading {
    margin-bottom: 36px;
  }

  .submission-guide,
  #submissionForm {
    padding: 24px 20px;
  }

  .letter-panel__header {
    padding: 20px;
  }

  .letter-panel__header {
    flex-direction: column;
  }

  textarea {
    min-height: 280px;
  }

  .turnstile-sample {
    grid-template-columns: 38px 1fr;
  }

  .turnstile-sample strong {
    display: none;
  }

  .form-actions,
  .preview-modal__actions {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .form-actions .button,
  .preview-modal__actions .button,
  .submission-scene__result .button {
    width: 100%;
  }

  .preview-modal {
    width: calc(100% - 22px);
  }

  .preview-modal__header,
  .preview-modal__actions {
    padding-inline: 18px;
  }

  .letter-preview {
    margin-inline: 18px;
    padding: 24px 20px;
  }

  .faq-section-summary,
  .letter-search-section-summary,
  .contact-section-summary {
    min-height: 68px;
    padding: 18px 52px 18px 20px;
  }

  .faq-section-summary::after,
  .letter-search-section-summary::after,
  .contact-section-summary::after {
    right: 20px;
  }

  .letter-search-section-content,
  .faq-section-content {
    padding: 22px 20px 26px;
  }

  .letter-search-fields {
    grid-template-columns: 1fr;
  }

  .letter-search-actions .button {
    width: 100%;
  }

  .letter-search-modal {
    width: calc(100% - 22px);
  }

  .letter-search-modal__header,
  .letter-search-results {
    padding-inline: 18px;
  }

  .letter-search-result__id-row {
    align-items: flex-start;
  }

  .faq-question {
    grid-template-columns: 28px minmax(0, 1fr) 20px;
    gap: 10px;
    padding: 14px 12px;
  }

  .faq-answer {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 10px;
    margin-inline: 12px;
    padding-left: 8px;
  }

  .contact-section-content {
    padding: 24px 20px;
  }

  .contact-section-content .button {
    width: 100%;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 380px) {
  .hero-actions {
    grid-template-columns: 1fr;
  }
}
.submission-layout--single {
  grid-template-columns: minmax(0, 860px);
  justify-content: center;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}
@media (max-width: 620px) {
  .field-label-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  html[lang="en"] .hero__copy {
    font-size: 0.98rem;
    line-height: 1.8;
  }

  html[lang="en"] .letter-panel__header .draft-status {
    white-space: normal;
  }

  .letter-rules-modal {
    width: calc(100% - 22px);
    max-height: 88svh;
  }

  .letter-rules-modal__inner {
    max-height: 88svh;
  }

  .letter-rules-modal__header,
  .letter-rules-modal__content {
    padding-inline: 18px;
  }
}