:root {
  --bg: #0f1115;
  --card-bg: #1a1d24;
  --text: #e8e8ea;
  --muted: #8a8f98;
  --accent: #4f8cff;
  --error: #ff5c5c;
  --border: #2a2d35;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.screen { min-height: 100vh; }
.hidden { display: none !important; }

#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 360px;
}

.card h1 { margin-top: 0; }

form { display: flex; flex-direction: column; gap: 12px; }

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

input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
}

button {
  background: var(--accent);
  border: none;
  border-radius: 6px;
  padding: 10px 12px;
  color: white;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
}

button:hover { opacity: 0.9; }

.error {
  color: var(--error);
  font-size: 13px;
  min-height: 18px;
  margin: 4px 0 0;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.upload-area {
  padding: 24px;
  border-bottom: 1px solid var(--border);
}

#file-list {
  list-style: none;
  padding: 0 24px;
  margin: 0;
}

#file-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

#file-list button {
  margin-left: 8px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}