:root {
  --bg: #0f1419;
  --panel: #1a2030;
  --panel2: #232b40;
  --fg: #d8dee9;
  --muted: #8a93a6;
  --green: #6bcb77;
  --yellow: #ffd23f;
  --red: #ef476f;
  --blue: #4cc9f0;
  --border: #2d3650;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 30px;
}

.subtitle {
  color: var(--muted);
  margin: 0 0 32px;
}

code {
  background: #0b0f17;
  padding: 1px 6px;
  border-radius: 4px;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
  font-size: 0.92em;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 28px;
}

.card.error h1 {
  margin-top: 0;
  color: var(--red);
}

.upload-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field .label {
  font-weight: 600;
  font-size: 14px;
}

.field em {
  color: var(--muted);
  font-style: normal;
  font-weight: 400;
}

.field .hint {
  color: var(--muted);
  font-size: 12.5px;
}

input[type="file"],
input[type="text"] {
  background: var(--panel2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
}

input[type="text"]:focus,
input[type="file"]:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(76, 201, 240, 0.15);
}

.btn-primary,
.btn-secondary {
  display: inline-block;
  cursor: pointer;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  text-decoration: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--blue);
  color: #0b0f17;
  align-self: flex-start;
}

.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-secondary {
  background: transparent;
  color: var(--blue);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--panel2);
}

.info h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

.info ul {
  padding-left: 20px;
}

.info li {
  margin: 4px 0;
}

.muted {
  color: var(--muted);
  font-size: 13px;
}