*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg-deep: #06080f;
  --panel: rgba(8, 14, 26, 0.78);
  --panel-glass: rgba(255, 255, 255, 0.03);
  --panel-glass-border: rgba(255, 255, 255, 0.12);
  --panel-strong: rgba(10, 18, 32, 0.92);
  --panel-border: rgba(120, 170, 255, 0.14);
  --panel-glow: rgba(80, 160, 255, 0.08);
  --text: #eef3fb;
  --text-muted: #8fa3bf;
  --green: #45d483;
  --green-dim: rgba(69, 212, 131, 0.14);
  --red: #ff6b6b;
  --red-dim: rgba(255, 107, 107, 0.14);
  --blue: #5eb3ff;
  --blue-dim: rgba(94, 179, 255, 0.16);
  --accent: #4a9eff;
  --radius: 12px;
  --font: "SF Pro Display", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg-deep);
  color: var(--text);
  font-family: var(--font);
}

.video-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.video-bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(30, 60, 120, 0.12), transparent 40%),
    linear-gradient(180deg, rgba(4, 8, 16, 0.25) 0%, rgba(4, 8, 16, 0.45) 100%);
}

.app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 28px 12px;
}

.brand-title {
  margin: 0;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
  text-shadow: 0 0 24px rgba(94, 179, 255, 0.25);
}

.brand-title span {
  display: block;
  font-size: 0.55em;
  letter-spacing: 0.35em;
  color: var(--text-muted);
  margin-top: 4px;
}

.top-meta {
  padding: 8px 14px;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: rgba(8, 14, 26, 0.55);
  color: var(--text-muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 8px 14px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 18px;
  padding: 0 28px 28px;
  min-height: 0;
}

.panel {
  background: var(--panel-glass);
  border: 1px solid var(--panel-glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.06) inset,
    0 12px 32px rgba(0, 0, 0, 0.15);
}

.editor .panel,
.notebook-panel,
.empty-state.panel,
.sidebar.panel {
  background: var(--panel-glass);
  border: 1px solid var(--panel-glass-border);
  backdrop-filter: blur(6px);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.06) inset,
    0 12px 32px rgba(0, 0, 0, 0.15);
}

.notebook-panel .panel-header,
.notebook-panel .form-footer {
  border-color: rgba(255, 255, 255, 0.12);
}

.notebook-panel input,
.notebook-panel textarea,
.notebook-panel .toggle-btn,
.sidebar input {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.1);
}

.notebook-panel input:focus,
.notebook-panel textarea:focus,
.sidebar input:focus {
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.06);
}

.sidebar {
  display: flex;
  flex-direction: column;
  padding: 18px;
  min-height: 0;
}

.panel-label {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.search-wrap {
  margin: 14px 0;
}

.search-wrap input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
}

.search-wrap input::placeholder {
  color: rgba(143, 163, 191, 0.65);
}

.note-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  flex: 1;
}

.note-item {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  padding: 12px;
  border-radius: 10px;
  cursor: pointer;
  margin-bottom: 8px;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.note-item:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.1);
}

.note-item.active {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.04);
}

.note-item-title {
  display: block;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text);
}

.note-item-meta {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.68rem;
  margin-left: 6px;
  letter-spacing: 0.04em;
}

.badge-open {
  background: var(--green-dim);
  color: var(--green);
  border: 1px solid rgba(69, 212, 131, 0.25);
}

.badge-closed {
  background: var(--red-dim);
  color: var(--red);
  border: 1px solid rgba(255, 107, 107, 0.25);
}

.editor {
  min-height: 0;
  overflow-y: auto;
}

.empty-state {
  height: 100%;
  min-height: 420px;
  display: grid;
  place-items: center;
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
}

.empty-state strong {
  color: var(--blue);
}

.notebook-panel {
  padding: 22px 24px 20px;
  max-width: 820px;
}

.panel-header {
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--panel-border);
}

.panel-tag {
  display: inline-block;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 8px;
}

.panel-header h2 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.24em;
  font-weight: 600;
  color: var(--text);
}

.form-section {
  margin-bottom: 22px;
}

.section-title {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.form-grid.three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

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

label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 12px 14px;
  font: inherit;
  background: rgba(0, 0, 0, 0.32);
  color: var(--text);
}

textarea {
  resize: vertical;
  min-height: 130px;
  line-height: 1.65;
}

input::placeholder,
textarea::placeholder {
  color: rgba(143, 163, 191, 0.55);
}

input:focus,
textarea:focus {
  outline: none;
  border-color: rgba(94, 179, 255, 0.55);
  box-shadow: 0 0 0 3px rgba(94, 179, 255, 0.12);
}

.toggle-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.toggle-btn {
  padding: 11px 10px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: rgba(0, 0, 0, 0.28);
  color: var(--text-muted);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.toggle-btn:hover {
  border-color: rgba(120, 170, 255, 0.25);
  color: var(--text);
}

.toggle-btn.active[data-value="open"] {
  background: var(--green-dim);
  border-color: rgba(69, 212, 131, 0.45);
  color: var(--green);
  box-shadow: 0 0 16px rgba(69, 212, 131, 0.12);
}

.toggle-btn.active[data-value="closed"] {
  background: var(--red-dim);
  border-color: rgba(255, 107, 107, 0.4);
  color: var(--red);
  box-shadow: 0 0 16px rgba(255, 107, 107, 0.1);
}

.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 8px;
  padding-top: 18px;
  border-top: 1px solid var(--panel-border);
}

.note-date {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.actions {
  display: flex;
  gap: 10px;
}

.btn {
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
  padding: 10px 16px;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.btn-accent {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(8px);
  box-shadow: 0 0 16px rgba(255, 255, 255, 0.04);
}

.btn-accent:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.32);
}

.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: rgba(255, 107, 107, 0.35);
}

.btn-danger:hover {
  background: var(--red-dim);
}

.read-only-badge {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 8px 10px;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  padding: 20px;
}

.modal-card {
  width: min(400px, 92vw);
  padding: 24px;
}

.modal-card h3 {
  margin: 0 0 8px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.modal-card p {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.modal-card input {
  width: 100%;
  margin-bottom: 16px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.modal-error {
  margin-top: 12px;
  color: var(--red);
  font-size: 0.85rem;
  text-align: center;
}

input:read-only,
textarea:read-only {
  opacity: 0.92;
  cursor: default;
}

.hidden {
  display: none !important;
}

@media (max-width: 960px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .sidebar {
    max-height: 38vh;
  }

  .form-grid.three {
    grid-template-columns: 1fr;
  }

  .top-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}