:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #22263a;
  --accent: #5b8dee;
  --accent-hover: #3a6fdb;
  --danger: #e05c5c;
  --danger-hover: #c44040;
  --text: #e8eaf0;
  --text-muted: #7a7f9a;
  --border: #2c3050;
  --success: #3ecf8e;
  --error: #e05c5c;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  text-align: center;
}

header h1 { font-size: 2rem; letter-spacing: -0.5px; }
header .tagline { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.25rem; }

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

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.mt { margin-top: 1.5rem; }

textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
  margin-bottom: 0.75rem;
  transition: border-color 0.2s;
}

textarea:focus { outline: none; border-color: var(--accent); }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  margin-bottom: 0.75rem;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(91,141,238,0.07);
}

.drop-zone input[type="file"] { display: none; }
.drop-icon { font-size: 2rem; display: block; margin-bottom: 0.5rem; }
.drop-zone p { color: var(--text-muted); font-size: 0.9rem; }

.file-name-preview {
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  min-height: 1.2em;
  word-break: break-all;
}

.hint { color: var(--text-muted); font-size: 0.8rem; margin-top: 0.5rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.55rem 1.2rem;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}

.btn:active { transform: scale(0.97); }

.btn-primary { background: var(--accent); color: #fff; width: 100%; text-align: center; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-copy { background: var(--surface2); color: var(--accent); border: 1px solid var(--border); }
.btn-copy:hover { background: var(--border); }

.btn-sm { padding: 0.3rem 0.75rem; font-size: 0.8rem; }

/* Item lists */
.item-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }

.item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.item-body { flex: 1; min-width: 0; }

.snippet {
  font-family: 'Cascadia Code', 'Fira Mono', monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 5em;
  overflow: hidden;
  color: var(--text);
}

.filename {
  font-weight: 500;
  word-break: break-all;
}

.meta {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.item-actions {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex-shrink: 0;
}

.inline-form { display: inline; }

/* Flash messages */
.flash-container { margin-bottom: 1.5rem; display: flex; flex-direction: column; gap: 0.5rem; }

.flash {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: opacity 1s ease;
}

.flash-success { background: rgba(62,207,142,0.15); border: 1px solid var(--success); color: var(--success); }
.flash-error   { background: rgba(224,92,92,0.15);  border: 1px solid var(--error);   color: var(--error); }

.empty {
  text-align: center;
  color: var(--text-muted);
  margin-top: 3rem;
  font-size: 1rem;
}