:root {
  color-scheme: light;
  --ink: #18201f;
  --muted: #62706c;
  --paper: #f7f4ee;
  --panel: #fffdf8;
  --line: #d9d1c4;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --shadow: 0 24px 70px rgba(24, 32, 31, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-serif, Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.14), transparent 34%),
    radial-gradient(circle at 80% 20%, rgba(209, 180, 112, 0.24), transparent 28%),
    var(--paper);
}

.shell {
  width: min(920px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  place-items: center;
  padding: 56px 0;
}

.panel {
  width: 100%;
  padding: clamp(28px, 6vw, 64px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.88);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 12px;
  font-family: ui-sans-serif, "Avenir Next", Helvetica, sans-serif;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

h1 {
  margin: 0;
  font-size: clamp(52px, 11vw, 112px);
  line-height: 0.9;
  font-weight: 700;
}

.lead {
  max-width: 640px;
  margin: 24px 0 34px;
  font-family: ui-sans-serif, "Avenir Next", Helvetica, sans-serif;
  font-size: clamp(16px, 2.2vw, 20px);
  line-height: 1.75;
  color: var(--muted);
}

.upload-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: stretch;
}

.file-picker {
  flex: 1 1 280px;
  display: grid;
  place-items: center start;
  min-height: 52px;
  padding: 0 16px;
  border: 1px dashed var(--accent);
  border-radius: 8px;
  font-family: ui-sans-serif, "Avenir Next", Helvetica, sans-serif;
  color: var(--accent-strong);
  cursor: pointer;
}

.file-picker input {
  width: 100%;
  margin-top: 8px;
  color: var(--muted);
}

button {
  min-height: 52px;
  padding: 0 22px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: 700 16px ui-sans-serif, "Avenir Next", Helvetica, sans-serif;
  cursor: pointer;
}

button:hover {
  background: var(--accent-strong);
}

.result {
  min-height: 132px;
  margin: 24px 0 0;
  padding: 18px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #111816;
  color: #d7fff6;
  font-size: 14px;
  line-height: 1.6;
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 20px, 920px);
    padding: 20px 0;
  }

  .panel {
    padding: 24px;
  }

  button {
    width: 100%;
  }
}