:root {
  --paper: #f5f2ea;
  --paper-edge: #e8e3d6;
  --ink: #1a1a18;
  --ink-soft: #46443e;
  --ink-faint: #8a877c;
  --hairline: rgba(26, 26, 24, 0.18);
  --ensou-opacity: 0.05;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171613;
    --paper-edge: #201f1b;
    --ink: #ece8dd;
    --ink-soft: #c8c3b4;
    --ink-faint: #837e70;
    --hairline: rgba(236, 232, 221, 0.16);
    --ensou-opacity: 0.06;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6vh 5vw;
  background: var(--paper);
  background-image: radial-gradient(circle at 20% 15%, var(--paper-edge), transparent 55%), radial-gradient(circle at 85% 90%, var(--paper-edge), transparent 60%);
  color: var(--ink);
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  position: relative;
  overflow-x: hidden;
}

.ensou {
  position: fixed;
  top: 50%;
  left: 50%;
  width: min(90vw, 900px);
  height: min(90vw, 900px);
  transform: translate(-50%, -50%);
  color: var(--ink);
  opacity: var(--ensou-opacity);
  pointer-events: none;
  z-index: 0;
}

.card {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  background: var(--paper);
  border: 1px solid var(--hairline);
  box-shadow: 0 1px 0 var(--hairline);
  padding: clamp(1.75rem, 4vw, 3rem);
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 600;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.6rem;
}

h1 .kanji {
  font-size: 1.6em;
  line-height: 1;
}

.tagline {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  margin-bottom: 0.35rem;
}

textarea,
select {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--hairline);
  padding: 0.5rem 0.1rem;
  border-radius: 0;
}

textarea {
  resize: vertical;
  line-height: 1.6;
}

textarea:focus,
select:focus {
  outline: none;
  border-bottom-color: var(--ink);
}

.row {
  display: grid;
  grid-template-columns: 0.8fr 1.3fr 0.9fr;
  gap: 1rem;
  min-width: 0;
}

.row .field {
  min-width: 0;
}

.row select {
  text-overflow: ellipsis;
}

@media (max-width: 480px) {
  .row {
    grid-template-columns: 1fr;
  }
}

input[type="range"] {
  width: 100%;
  accent-color: var(--ink);
  background: transparent;
}

button {
  margin-top: 0.5rem;
  padding: 0.75rem 1rem;
  font-family: "Shippori Mincho", serif;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--paper);
  background: var(--ink);
  border: 1px solid var(--ink);
  cursor: pointer;
  transition:
    opacity 0.15s ease,
    transform 0.1s ease;
}

button:hover:not(:disabled) {
  opacity: 0.85;
}

button:active:not(:disabled) {
  transform: translateY(1px);
}

button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.status {
  margin: 0;
  min-height: 1.2em;
  font-size: 0.82rem;
  color: var(--ink-faint);
}

audio {
  width: 100%;
  filter: grayscale(1);
}

footer {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--hairline);
  text-align: center;
  font-size: 0.75rem;
  color: var(--ink-faint);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
}

footer a {
  color: var(--ink-soft);
}