:root {
  --page-bg: #f6efe3;
  --shape-a: #f3d8a7;
  --shape-b: #c8d9cf;
  --shape-c: #f0cdbd;
  --card-bg: rgba(255, 250, 243, 0.94);
  --card-border: #d7c8b3;
  --divider: #efe3d4;
  --text: #13281e;
  --muted: #6f6d63;
  --headline: #8f6a2f;
  --button: #d77243;
  --button-hover: #c66334;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--page-bg);
}

body {
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  border-radius: 999px;
  pointer-events: none;
  filter: blur(2px);
  opacity: 0.9;
}

body::before {
  top: -8rem;
  left: -10rem;
  width: 28rem;
  height: 28rem;
  background: var(--shape-a);
}

body::after {
  right: -6rem;
  top: 4rem;
  width: 24rem;
  height: 24rem;
  background: var(--shape-b);
}

.page-shell {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  padding: 4.5rem 2rem 5rem;
}

.page-shell::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 28rem;
  height: 28rem;
  border-radius: 999px;
  background: var(--shape-c);
  z-index: 0;
}

.hero,
.card-grid {
  position: relative;
  z-index: 1;
}

.hero {
  margin-bottom: 3rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3rem, 7vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: #53685c;
  font-size: 1.55rem;
  font-weight: 600;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  align-items: start;
}

.reader-card {
  background: var(--card-bg);
  border: 3px solid var(--card-border);
  border-radius: 2.5rem;
  padding: 2.3rem 2.35rem 2.5rem;
  backdrop-filter: blur(6px);
  min-height: 34rem;
}

.reader-card h2,
.preview-area h3 {
  margin: 0;
  color: var(--headline);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  font-size: 1.85rem;
}

.card-topline {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.card-topline p,
.timezone-note {
  margin: 0;
  color: #788078;
  font-size: 1.45rem;
  font-weight: 600;
}

.timezone-note {
  margin-top: 0.75rem;
  color: #55705d;
}

.selection-area {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem 1.4rem;
}

.selector-block {
  display: grid;
  gap: 0.5rem;
}

.selector-label {
  color: #8b755d;
  font-size: 1.15rem;
  font-weight: 700;
}

.selector-block input {
  width: 100%;
  border: 2px solid var(--card-border);
  border-radius: 1.2rem;
  padding: 1rem 1.1rem;
  background: #fffaf3;
  color: var(--text);
  font: inherit;
  font-size: 1.75rem;
  font-weight: 700;
}

.selector-block input:focus {
  outline: 3px solid rgba(215, 114, 67, 0.18);
  border-color: var(--button);
}

.convert-button {
  grid-column: 1 / -1;
  border: 0;
  border-radius: 1.45rem;
  padding: 1.2rem 1.5rem;
  background: var(--button);
  color: #fffaf3;
  font: inherit;
  font-size: 2rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease;
}

.convert-button:hover {
  background: var(--button-hover);
}

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

.selection-divider {
  margin-top: 1.35rem;
}

.preview-area {
  margin-top: 1.35rem;
}

.preview-area h3 {
  color: #55705d;
}

.reading-stack {
  margin-top: 2.3rem;
}

.reading-stack-preview {
  margin-top: 1.7rem;
}

.reading-row {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  align-items: center;
  gap: 1.35rem;
  min-height: 8.5rem;
}

.reading-row-romaji {
  align-items: start;
}

.reading-label {
  margin: 0;
  color: #7d6a55;
  font-size: 1.95rem;
  font-weight: 700;
}

.reading-value {
  margin: 0;
  color: var(--text);
  white-space: pre-line;
}

.reading-value-universal {
  font-size: clamp(2rem, 3.2vw, 3.3rem);
  font-weight: 800;
}

.reading-value-japanese {
  font-size: clamp(1.9rem, 3vw, 3rem);
  font-weight: 800;
}

.reading-value-romaji {
  color: #5e4437;
  font-size: clamp(1.8rem, 2.8vw, 2.7rem);
  font-weight: 800;
  line-height: 1.32;
}

.reading-divider {
  height: 4px;
  width: 100%;
  border-radius: 999px;
  background: var(--divider);
}

@media (max-width: 1100px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .reader-card {
    min-height: unset;
  }
}

@media (max-width: 720px) {
  .page-shell {
    padding: 3rem 1rem 4rem;
  }

  .eyebrow {
    font-size: 1.1rem;
  }

  .reader-card {
    border-radius: 1.8rem;
    padding: 1.5rem 1.2rem 1.7rem;
  }

  .selection-area {
    grid-template-columns: 1fr;
  }

  .reading-row {
    grid-template-columns: 1fr;
    gap: 0.6rem;
    min-height: unset;
    padding: 1rem 0;
  }

  .reading-label {
    font-size: 1.45rem;
  }

  .reading-value-universal,
  .reading-value-japanese,
  .reading-value-romaji {
    font-size: 1.85rem;
  }
}