:root {
  --bg: #f4efe6;
  --bg-accent: #e8dcc8;
  --panel: rgba(255, 251, 245, 0.9);
  --line: #d6c4aa;
  --text: #241d17;
  --muted: #716457;
  --primary: #b44b26;
  --primary-dark: #8d381a;
  --secondary: #245f66;
  --secondary-dark: #183f43;
  --ghost: #ece3d4;
  --success: #2c6b4a;
  --danger: #aa3727;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Noto Serif KR", serif;
  background:
    radial-gradient(circle at top left, rgba(180, 75, 38, 0.18), transparent 30%),
    radial-gradient(circle at right bottom, rgba(36, 95, 102, 0.15), transparent 28%),
    linear-gradient(180deg, var(--bg), var(--bg-accent));
}

.shell {
  width: min(960px, calc(100% - 32px));
  margin: 36px auto 48px;
}

.hero {
  padding: 12px 4px 24px;
}

.eyebrow,
h1,
h2,
.action,
.upload-button {
  font-family: "Space Grotesk", sans-serif;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(34px, 6vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.hero-copy {
  margin: 18px 0 0;
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.panel {
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: 0 22px 60px rgba(39, 28, 18, 0.08);
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.panel-head {
  margin-bottom: 18px;
}

.panel-head h2 {
  margin: 0 0 6px;
  font-size: 24px;
}

.panel-head p {
  margin: 0;
  color: var(--muted);
}

.field-label {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.source-box,
.result-box {
  width: 100%;
  min-height: 320px;
  padding: 18px;
  border: 1px solid var(--line);
  background: #fffdf9;
  color: var(--text);
  resize: vertical;
  font: inherit;
  font-size: 16px;
  line-height: 1.7;
}

.upload-row,
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.upload-row {
  margin-top: 18px;
}

.file-name {
  color: var(--muted);
  font-size: 14px;
}

.quality-note,
.quality-badge,
.verification-summary {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.quality-note,
.quality-badge {
  display: inline-block;
  margin-top: 18px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
}

.verification-summary {
  margin: 10px 0 16px;
}

.action-row {
  margin-top: 22px;
}

.upload-button,
.action {
  border: 0;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease, background 120ms ease;
}

.upload-button,
.action {
  padding: 14px 18px;
  font-size: 15px;
}

.upload-button:hover,
.action:hover {
  transform: translateY(-1px);
}

.primary {
  background: var(--primary);
  color: #fff8f2;
}

.primary:hover {
  background: var(--primary-dark);
}

.secondary {
  background: var(--secondary);
  color: #eef8f8;
}

.secondary:hover {
  background: var(--secondary-dark);
}

.ghost,
.upload-button {
  background: var(--ghost);
  color: var(--text);
}

.status-message {
  min-height: 24px;
  margin: 16px 0 0;
  color: var(--muted);
}

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

.status-message.success {
  color: var(--success);
}

.action:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

@media (max-width: 720px) {
  .shell {
    width: min(100% - 20px, 960px);
    margin-top: 20px;
  }

  .panel {
    padding: 18px;
  }

  .source-box,
  .result-box {
    min-height: 260px;
  }

  .action-row > *,
  .upload-row > * {
    width: 100%;
  }
}