:root {
  --bg-start: #0f0518;
  --bg-mid: #1a0b2e;
  --bg-end: #2d1b4e;
  --panel: rgba(45, 27, 78, 0.72);
  --panel-solid: #1e1135;
  --panel-hover: rgba(61, 35, 102, 0.85);
  --panel-border: rgba(167, 139, 250, 0.22);
  --text: #f5f3ff;
  --muted: #a78bfa;
  --accent: #c084fc;
  --accent-2: #8b5cf6;
  --accent-glow: rgba(192, 132, 252, 0.35);
  --danger: #f87171;
  --success: #34d399;
  --radius: 16px;
  --radius-sm: 10px;
  --gap: 22px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: radial-gradient(ellipse at top left, var(--bg-start) 0%, var(--bg-mid) 40%, var(--bg-end) 100%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.55;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 25%, rgba(139, 92, 246, 0.12) 0%, transparent 35%),
    radial-gradient(circle at 85% 75%, rgba(192, 132, 252, 0.10) 0%, transparent 35%);
  pointer-events: none;
  z-index: 0;
}

#app {
  position: relative;
  z-index: 1;
  max-width: 1300px;
  margin: 0 auto;
  padding: var(--gap);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--gap);
  padding: 18px 24px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), var(--shadow-glow);
  backdrop-filter: blur(16px);
}

header h1 {
  margin: 0;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#btnCreateSpace {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  padding: 0;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.38);
}

main {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--muted);
}
.empty-title { font-size: 1.4rem; font-weight: 600; margin-bottom: 10px; color: var(--text); }
.empty-meta { font-size: 0.95rem; }

.space-card {
  background: var(--panel);
  border-radius: var(--radius);
  padding: var(--gap);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  transition: border-color 180ms ease, box-shadow 180ms ease;
  cursor: pointer;
}

.space-card:hover {
  border-color: rgba(167, 139, 250, 0.35);
  box-shadow: var(--shadow), 0 0 28px rgba(139, 92, 246, 0.14);
}

.space-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.space-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.space-notes {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 18px;
}

.space-groups {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.group-card {
  background: rgba(30, 17, 53, 0.65);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  border: 1px solid rgba(167, 139, 250, 0.14);
  transition: border-color 150ms ease, transform 150ms ease;
}

.group-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.group-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.group-name {
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text);
}

.copy-group-btn {
  padding: 6px 12px;
  font-size: 0.78rem;
  background: rgba(139, 92, 246, 0.18);
  border: 1px solid rgba(167, 139, 250, 0.3);
  color: var(--accent);
  border-radius: 8px;
}

.copy-group-btn:hover {
  background: rgba(139, 92, 246, 0.3);
  color: var(--text);
}

.group-folders {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.group-folder {
  background: rgba(15, 5, 24, 0.35);
  border-radius: 8px;
  padding: 10px 12px;
  border: 1px solid rgba(167, 139, 250, 0.1);
}

.group-folder .folder-title { font-weight: 600; font-size: 0.92rem; }
.group-folder .folder-meta { font-size: 0.78rem; color: var(--muted); margin-top: 3px; }

button {
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  color: #fff;
  transition: transform 120ms ease, filter 120ms ease, box-shadow 120ms ease;
  white-space: nowrap;
}

button:hover { transform: translateY(-1px); filter: brightness(1.12); }
button:active { transform: translateY(0); }
button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  filter: none;
}

button.primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.32);
}

button.secondary {
  background: rgba(167, 139, 250, 0.12);
  border: 1px solid rgba(167, 139, 250, 0.28);
  color: var(--accent);
}

button.danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.25);
}

button.small { padding: 7px 12px; font-size: 0.8rem; }

.form-row { margin-bottom: 16px; }
.form-row:last-child { margin-bottom: 0; }

.form-row label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 7px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  background: rgba(15, 5, 24, 0.55);
  color: var(--text);
  border: 1px solid rgba(167, 139, 250, 0.22);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 0.96rem;
  font-family: inherit;
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  border-color: var(--accent);
  background: rgba(15, 5, 24, 0.75);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-row textarea { resize: vertical; }

.input-with-button {
  display: flex;
  gap: 10px;
  align-items: center;
}

.input-with-button input { flex: 1; }

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 18px 0 10px;
}

.panel-header h4 { margin: 0; color: var(--accent); font-size: 1rem; }

.folders-list { display: flex; flex-direction: column; gap: 10px; }

.folder-card {
  background: rgba(30, 17, 53, 0.65);
  border-radius: 8px;
  padding: 12px 14px;
  cursor: pointer;
  border: 1px solid rgba(167, 139, 250, 0.14);
  transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.folder-card:hover {
  background: var(--panel-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.folder-card .folder-title { font-weight: 600; font-size: 0.98rem; }
.folder-card .folder-meta { font-size: 0.8rem; color: var(--muted); margin-top: 4px; }

.folder-card .folder-group {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(139, 92, 246, 0.22);
  color: var(--accent);
  padding: 3px 8px;
  border-radius: 999px;
  margin-top: 6px;
}

.folder-tag {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fbbf24;
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.4);
  border-radius: 999px;
  padding: 3px 10px;
}

.group-folder.main-folder {
  border-color: rgba(139, 92, 246, 0.45);
  background: rgba(139, 92, 246, 0.12);
}

.group-folder.main-folder .folder-title {
  color: #e9d5ff;
}

.modal-actions, .panel-header, .actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.modal-actions { margin-top: 22px; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 4, 18, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 18px;
  backdrop-filter: blur(6px);
}

.modal.hidden { display: none; }

.modal-content {
  position: relative;
  background: linear-gradient(180deg, rgba(45, 27, 78, 0.95) 0%, rgba(26, 11, 46, 0.95) 100%);
  border-radius: var(--radius);
  padding: var(--gap);
  width: 100%;
  max-width: 640px;
  max-height: 88vh;
  overflow-y: auto;
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow), 0 0 60px rgba(139, 92, 246, 0.22);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--accent);
}

button.close {
  background: transparent;
  border: 1px solid rgba(167, 139, 250, 0.25);
  color: var(--muted);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 1.35rem;
  line-height: 1;
}

button.close:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(167, 139, 250, 0.12);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(167, 139, 250, 0.2);
  font-size: 0.85rem;
  color: var(--muted);
  background: rgba(15, 5, 24, 0.65);
  pointer-events: none;
  transition: opacity 280ms ease, border-color 180ms ease, color 180ms ease;
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
}

.status-pill.error {
  color: #fecaca;
  border-color: rgba(248, 113, 113, 0.4);
  background: rgba(127, 29, 29, 0.4);
  pointer-events: auto;
  cursor: pointer;
}

.status-pill.success {
  color: #a7f3d0;
  border-color: rgba(52, 211, 153, 0.35);
  background: rgba(6, 78, 59, 0.35);
}

.breadcrumbs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 14px 0 10px;
  font-size: 0.85rem;
  color: var(--muted);
  align-items: center;
}

.breadcrumbs span { cursor: pointer; color: var(--accent); transition: color 120ms ease; }
.breadcrumbs span:hover { color: var(--text); text-decoration: underline; }

.browser-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
  max-height: 340px;
  overflow-y: auto;
  padding: 4px;
}

.browser-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: rgba(15, 5, 24, 0.35);
  border: 1px solid transparent;
  transition: background 150ms ease, border-color 150ms ease;
}

.browser-item:hover {
  background: rgba(139, 92, 246, 0.16);
  border-color: rgba(167, 139, 250, 0.3);
}

.browser-item .icon { font-size: 1.2rem; }

.hidden { display: none !important; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: rgba(15, 5, 24, 0.4); border-radius: 4px; }
::-webkit-scrollbar-thumb { background: rgba(139, 92, 246, 0.35); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(139, 92, 246, 0.55); }

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}