:root {
  --bg: #fafafa;
  --fg: #1c1c1c;
  --accent: #0078ff;
  --border: #ddd;
  --card-bg: #fff;
  --shadow: rgba(0,0,0,0.08);
}
body.dark {
  --bg: #121212;
  --fg: #e0e0e0;
  --accent: #66aaff;
  --border: #333;
  --card-bg: #1e1e1e;
  --shadow: rgba(255,255,255,0.06);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', sans-serif;
  transition: background .3s, color .3s;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  box-shadow: 0 1px 4px var(--shadow);
  background: var(--card-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.toggle-container {
  position: absolute;
  right: 2rem;
}
.theme-toggle {
  display: none;
}
.toggle-label {
  display: inline-block;
  width: 50px;
  height: 26px;
  background: var(--border);
  border-radius: 26px;
  position: relative;
  cursor: pointer;
  transition: background .3s;
}
.toggle-ball {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--fg);
  transition: transform .3s;
}
.theme-toggle:checked + .toggle-label {
  background: var(--accent);
}
.theme-toggle:checked + .toggle-label .toggle-ball {
  transform: translateX(24px);
}

.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: 0 1px 3px var(--shadow);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

h1, h2 {
  text-align: center;
  margin: 0 0 1rem 0;
  font-weight: 500;
}

input, button {
  font: inherit;
  padding: .5rem .8rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--fg);
  background: var(--card-bg);
  transition: border .2s;
}
input:focus, button:focus { outline: none; border-color: var(--accent); }

button.primary, input.primary {
  background: var(--accent);
  color: #fff;
  border: none;
}
button.danger {
  background: #dc3545;
  color: #fff;
  border: none;
}

.file-box {
  border: 1px dashed var(--border);
  border-radius: 6px;
  padding: 1rem;
  margin: 1rem 0;
  background: var(--bg);
  min-height: 60px;
}

.file-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .6rem 1rem;
  margin-bottom: .6rem;
  box-shadow: 0 1px 2px var(--shadow);
}

.file-item input[type="text"] {
  justify-self: end;
  width: 180px;
  text-align: right;
}

.actions {
  text-align: center;
  margin: 3rem 0;
}
.hidden { display: none; }