@font-face {
  font-family: "KanjiStrokeOrders";
  src: url("./assets/KanjiStrokeOrders_v4.005.ttf") format("truetype");
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #0a0d12;
  --bg-accent: #111722;
  --panel: rgba(16, 21, 31, 0.82);
  --panel-border: rgba(204, 222, 255, 0.1);
  --text: #edf2f8;
  --muted: rgba(237, 242, 248, 0.62);
  --soft: rgba(237, 242, 248, 0.4);
  --accent: #a5e4cf;
  --accent-strong: #d8fff1;
  --button: rgba(165, 228, 207, 0.14);
  --button-hover: rgba(165, 228, 207, 0.24);
  --input-bg: rgba(255, 255, 255, 0.04);
  --warning: #f0c674;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

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

body {
  background:
    radial-gradient(circle at top, rgba(165, 228, 207, 0.08), transparent 32%),
    radial-gradient(circle at 20% 10%, rgba(102, 180, 255, 0.08), transparent 26%),
    linear-gradient(180deg, var(--bg-accent) 0%, var(--bg) 58%);
  color: var(--text);
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Hiragino Mincho ProN", serif;
}

button,
input {
  font: inherit;
}

.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;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.stage {
  position: relative;
  flex: 1;
  display: grid;
  place-items: center;
  padding: 4.5rem 1.25rem 1.5rem;
}

.render-frame {
  position: relative;
  z-index: 1;
  width: min(100%, 1100px);
  min-height: 45vh;
}

.render-track {
  width: 100%;
  min-height: 45vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.render-output {
  --render-size: 320px;
  --render-gap: 1rem;
  display: grid;
  grid-template-columns: repeat(var(--render-columns, 1), minmax(0, var(--render-size)));
  grid-auto-rows: var(--render-size);
  justify-content: center;
  align-content: center;
  justify-items: center;
  gap: var(--render-gap);
  width: max-content;
  max-width: 100%;
  margin: 0 auto;
}

.render-char {
  width: var(--render-size);
  height: var(--render-size);
  display: grid;
  place-items: center;
  font-family: "KanjiStrokeOrders", "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: calc(var(--render-size) * 0.9);
  line-height: 1;
  color: var(--text);
  text-shadow: 0 0 18px rgba(255, 255, 255, 0.06);
}

.empty-state {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(calc(100% - 2.5rem), 28rem);
  transform: translate(-50%, -50%);
  margin: 0;
  text-align: center;
  color: var(--muted);
  font-size: clamp(0.95rem, 0.85rem + 0.4vw, 1.15rem);
  line-height: 1.55;
  transition: opacity 140ms ease;
}

.stage.has-content .empty-state {
  opacity: 0;
  pointer-events: none;
}

.controls {
  position: sticky;
  bottom: 0;
  padding: 0 1rem 1rem;
}

.control-bar {
  width: min(100%, 50rem);
  margin-left: auto;
  margin-right: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.9rem;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.word-input {
  width: 100%;
  min-width: 30ch;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.95rem 1.15rem;
  background: var(--input-bg);
  color: var(--text);
  outline: none;
  transition: border-color 140ms ease, background-color 140ms ease;
}

.word-input::placeholder {
  color: var(--soft);
}

.word-input:focus {
  border-color: rgba(165, 228, 207, 0.34);
  background: rgba(255, 255, 255, 0.06);
}

.action-button {
  appearance: none;
  border: 1px solid rgba(165, 228, 207, 0.24);
  border-radius: 999px;
  padding: 0.95rem 1.1rem;
  background: var(--button);
  color: var(--accent-strong);
  cursor: pointer;
  transition: background-color 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.action-button:hover,
.action-button:focus-visible {
  background: var(--button-hover);
  border-color: rgba(165, 228, 207, 0.42);
}

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

.action-button-secondary {
  color: var(--text);
}

.feedback {
  width: min(100%, 50rem);
  margin-left: auto;
  margin-right: auto;
  min-height: 1.5rem;
  margin-top: 0.7rem;
  margin-bottom: 0;
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
}

.feedback.is-warning {
  color: var(--warning);
}

.feedback.is-error {
  color: #f2a7a7;
}

@media (max-width: 720px) {
  .stage {
    padding-top: 2rem;
  }

  .render-frame {
    min-height: 40vh;
  }

  .render-track {
    min-height: 40vh;
    padding: 0.5rem;
  }

  .control-bar {
    width: 100%;
    grid-template-columns: 1fr;
    border-radius: 28px;
  }

  .action-button {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .controls {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
    padding-bottom: 0.75rem;
  }

  .control-bar {
    padding: 0.75rem;
    gap: 0.6rem;
  }

  .word-input,
  .action-button {
    padding-top: 0.88rem;
    padding-bottom: 0.88rem;
  }
}