:root {
  --pink: #f4c4d4;
  --blush: #f7d7c8;
  --lavender: #cbb6ef;
  --sky: #9ec7f2;
  --mint: #9ad9c6;
  --mint-soft: rgba(154, 217, 198, 0.42);
  --ink: #35323a;
  --ink-soft: #5d5863;
  --line: #d5d0da;
  --focus: #4fb8a6;
  --danger: #e05656;
  --paper: rgba(255, 255, 255, 0.72);
  --card: #f4f7ff;
  --shadow: 0 18px 40px rgba(120, 96, 160, 0.16);
  --radius: 22px;
  --max: 680px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(ellipse 70% 55% at 8% 0%, #ffd5e4 0%, transparent 58%),
    radial-gradient(ellipse 60% 50% at 100% 12%, #d8c4ff 0%, transparent 55%),
    radial-gradient(ellipse 80% 60% at 80% 100%, #9ec8f5 0%, transparent 60%),
    linear-gradient(165deg, #f8d5c8 0%, #e3c6ea 38%, #c9c0f0 68%, #b7d6f6 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255, 255, 255, 0.35) 3px,
    rgba(255, 255, 255, 0.35) 4px
  );
}

#app {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  padding: 36px 20px 64px;
}

.shell {
  width: min(100%, var(--max));
}

.hero-art {
  background: linear-gradient(180deg, #ffffff 0%, #eef3ff 58%, #e7edff 100%);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  padding: 12px 8px 0;
}

.hero-art svg {
  display: block;
  width: 100%;
  height: auto;
}

.headline {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 28px 4px 14px;
}

.headline h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #3a2d3c;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.35);
}

.megaphone {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  filter: drop-shadow(0 4px 8px rgba(90, 70, 130, 0.25));
}

.lead {
  margin: 0 4px 8px;
  color: #4a4250;
  font-size: 16px;
  line-height: 1.8;
}

.mark {
  display: inline;
  padding: 2px 8px;
  margin: 4px 0;
  border-radius: 6px;
  background: var(--mint-soft);
  color: #2c3340;
  text-shadow: none;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

  .hr {
  border: 0;
  height: 1px;
  margin: 28px 0 8px;
  background: rgba(58, 45, 60, 0.14);
}

.composer {
  margin-top: 8px;
  padding: 20px 22px 12px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.32);
}

.composer h2 {
  margin: 0 0 28px;
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
}

.field {
  margin: 0 0 28px;
}

.field label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 13px;
}

.line,
.area {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  outline: none;
  transition: border-color 180ms ease;
}

.line {
  height: 44px;
  padding: 8px 0;
  font-size: 16px;
}

.area {
  min-height: 168px;
  padding: 8px 0 16px;
  resize: vertical;
  line-height: 1.8;
  font-size: 16px;
}

.line:focus,
.area:focus {
  border-bottom-color: var(--focus);
}

.line[aria-invalid="true"],
.area[aria-invalid="true"] {
  border-bottom-color: var(--danger);
}

.line:disabled {
  color: var(--ink);
  opacity: 1;
}

.hint,
.error {
  min-height: 20px;
  margin: 8px 0 0;
  font-size: 13px;
}

.error {
  color: var(--danger);
}

.delays {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  min-height: 44px;
  padding: 8px 18px;
  border: 1px solid transparent;
  border-bottom: 2px solid rgba(53, 50, 58, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
  color: var(--ink-soft);
  font: inherit;
  font-size: 15px;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 160ms ease;
}

.chip:hover {
  background: rgba(255, 255, 255, 0.6);
}

.chip[aria-pressed="true"] {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.82);
  border-bottom-color: var(--focus);
}

.chip:focus-visible,
.send:focus-visible,
.ghost:focus-visible,
.mail-head:focus-visible {
  outline: 3px solid rgba(79, 184, 166, 0.45);
  outline-offset: 2px;
}

.send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 48px;
  margin-top: 8px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, #67d2c2 0%, #3eaea0 100%);
  color: #fff;
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.08em;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(62, 174, 160, 0.28);
  transition: transform 160ms ease, filter 160ms ease, opacity 160ms ease;
}

.send:hover {
  filter: brightness(1.04);
}

.send:active {
  transform: scale(0.98);
}

.send:disabled {
  opacity: 0.6;
  cursor: wait;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.6;
}

.steps li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.steps b {
  color: var(--focus);
  font-weight: 700;
}

.panel {
  margin-top: 28px;
  padding: 28px 24px;
  border-radius: 20px;
  background: var(--paper);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 24px;
}

.panel p {
  margin: 0 0 12px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.letter-paper {
  margin-top: 18px;
  padding: 28px 24px 32px;
  border-radius: 8px 8px 16px 16px;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(180deg, #f7efe4, #fff) border-box;
  box-shadow: 0 16px 36px rgba(90, 70, 40, 0.12);
  white-space: pre-wrap;
  line-height: 1.9;
}

.letter-paper .meta {
  margin-bottom: 18px;
  color: #8a7d70;
  font-size: 13px;
}

.ghost {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 8px;
  padding: 0;
  border: 0;
  background: none;
  color: #2b7d73;
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.status {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--mint-soft);
  color: #21584e;
  font-size: 13px;
}

.foot {
  margin: 28px 0 0;
  text-align: right;
  font-size: 13px;
}

.foot a {
  color: rgba(53, 50, 58, 0.55);
  text-decoration: none;
}

.foot a:hover,
.foot a:focus-visible {
  color: var(--ink);
  text-decoration: underline;
}

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

.admin-shell {
  width: min(100%, 860px);
}

.admin-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 22px;
}

.admin-kicker {
  margin: 0 0 6px;
  color: var(--ink-soft);
  letter-spacing: 0.12em;
  font-size: 13px;
}

.admin-top h1 {
  margin: 0;
  font-size: 28px;
}

.admin-tools {
  display: grid;
  gap: 16px;
  margin-bottom: 18px;
}

.admin-count {
  margin: 0 0 12px;
  color: var(--ink-soft);
  font-size: 14px;
}

.mail-card {
  margin: 0 0 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 10px 24px rgba(90, 70, 130, 0.08);
  overflow: hidden;
}

.mail-head {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 4px 14px;
  width: 100%;
  min-height: 48px;
  padding: 14px 16px;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.mail-status {
  grid-row: 1 / span 2;
  align-self: center;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--mint-soft);
  color: #21584e;
  font-size: 12px;
  text-align: center;
}

.mail-title {
  font-weight: 600;
}

.mail-email,
.mail-when {
  color: var(--ink-soft);
  font-size: 13px;
}

.mail-body {
  padding: 0 16px 16px;
}

.mail-meta {
  margin: 0 0 10px;
  color: var(--ink-soft);
  font-size: 13px;
}

@media (min-width: 720px) {
  .mail-head {
    grid-template-columns: 88px 1fr auto auto;
    align-items: center;
  }

  .mail-status {
    grid-row: auto;
  }
}

@media (min-width: 768px) {
  #app {
    padding: 48px 24px 80px;
    align-items: flex-start;
  }

  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

@media (max-width: 640px) {
  #app {
    padding: 16px 14px 48px;
  }

  .headline h1 {
    font-size: 26px;
  }

  .composer h2 {
    margin-bottom: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .chip,
  .send,
  .line,
  .area {
    transition: none;
  }
}