/* ============================================
   JSONLab - UI Components (Material You)
   ============================================ */

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  user-select: none;
  min-height: 36px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--brand-primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--brand-primary-hover);
  color: white;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
  text-decoration: none;
}

.btn-gradient {
  background: var(--brand-gradient);
  color: white;
}

.btn-gradient:hover:not(:disabled) {
  color: white;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: 0.8125rem;
  min-height: 32px;
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: 0.9375rem;
  min-height: 44px;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border-radius: var(--radius-full);
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

.btn-block {
  width: 100%;
}

/* ===== Cards ===== */
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.card-hover:hover {
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card-link:hover {
  text-decoration: none;
  color: inherit;
}

/* ===== Tool card (homepage) ===== */
.tool-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.tool-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: inherit;
}

.tool-card .tool-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--bg-secondary);
  color: var(--brand-primary);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
}

.tool-card h3 {
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.tool-card p {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin: 0;
  line-height: 1.6;
}

.tool-card .tool-tag {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  font-size: 0.6875rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-error { background: var(--error-bg); color: var(--error); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-brand { background: var(--bg-selected); color: var(--brand-primary); }

/* ===== Form controls ===== */
.input, .textarea, .select {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input:focus, .textarea:focus, .select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(91,106,191,0.12);
}

.textarea {
  resize: vertical;
  min-height: 80px;
  font-family: var(--font-mono);
  line-height: 1.6;
}

.label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.helper-text {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

/* ===== Toggle switch ===== */
.toggle {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle .slider {
  position: absolute;
  inset: 0;
  background: var(--border-secondary);
  border-radius: var(--radius-full);
  transition: background var(--transition-base);
  cursor: pointer;
}

.toggle .slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.toggle input:checked + .slider {
  background: var(--brand-primary);
}

.toggle input:checked + .slider::before {
  transform: translateX(18px);
}

/* ===== Alert ===== */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid;
  font-size: 0.8125rem;
}

.alert-success { background: var(--success-bg); border-color: var(--success-border); color: var(--success); }
.alert-warning { background: var(--warning-bg); border-color: var(--warning-border); color: var(--warning); }
.alert-error { background: var(--error-bg); border-color: var(--error-border); color: var(--error); }
.alert-info { background: var(--info-bg); border-color: var(--info-border); color: var(--info); }

.alert svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-primary);
  margin-bottom: var(--space-5);
  overflow-x: auto;
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-tertiary);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--brand-primary);
  border-bottom-color: var(--brand-primary);
}

/* ===== Dropdown ===== */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-2);
  min-width: 200px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  display: none;
  z-index: var(--z-dropdown);
}

.dropdown.open .dropdown-menu {
  display: block;
}

.dropdown-menu a, .dropdown-menu button {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  text-align: left;
}

.dropdown-menu a:hover, .dropdown-menu button:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  text-decoration: none;
}

/* ===== Toast notifications ===== */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: var(--z-toast);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.8125rem;
  color: var(--text-primary);
  min-width: 240px;
  max-width: 360px;
  pointer-events: auto;
  animation: toast-in var(--transition-base);
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--error); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info { border-left: 3px solid var(--info); }

.toast.removing {
  animation: toast-out var(--transition-base) forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(8px); }
}

/* ===== Command Palette ===== */
.cmd-palette-backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--z-command-palette);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  animation: fade-in 150ms ease;
}

.cmd-palette-backdrop.open {
  display: flex;
}

.cmd-palette {
  width: 100%;
  max-width: 560px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
  animation: cmd-in var(--transition-base);
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes cmd-in {
  from { opacity: 0; transform: scale(0.98) translateY(-4px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.cmd-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-primary);
}

.cmd-input-wrap svg {
  width: 20px;
  height: 20px;
  color: var(--text-tertiary);
}

.cmd-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.cmd-input::placeholder { color: var(--text-tertiary); }

.cmd-results {
  max-height: 50vh;
  overflow-y: auto;
  padding: var(--space-2);
}

.cmd-group-label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  padding: var(--space-3) var(--space-3) var(--space-1);
}

.cmd-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-primary);
  text-decoration: none;
  transition: background var(--transition-fast);
}

.cmd-item:hover, .cmd-item.active {
  background: var(--bg-hover);
  text-decoration: none;
  color: inherit;
}

.cmd-item .cmd-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: var(--bg-secondary);
  color: var(--brand-primary);
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  flex-shrink: 0;
}

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

.cmd-item .cmd-title {
  font-size: 0.875rem;
  font-weight: 500;
  margin: 0;
}

.cmd-item .cmd-desc {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin: 0;
}

.cmd-item .cmd-shortcut {
  font-size: 0.6875rem;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.cmd-empty {
  padding: var(--space-8);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.8125rem;
}

.cmd-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  border-top: 1px solid var(--border-primary);
  font-size: 0.6875rem;
  color: var(--text-tertiary);
}

.cmd-footer kbd {
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  margin: 0 2px;
}

/* ===== Modal ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
  z-index: var(--z-modal);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  background: var(--bg-elevated);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: cmd-in var(--transition-base);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-primary);
}

.modal-header h3 {
  font-size: 1.0625rem;
}

.modal-body {
  padding: var(--space-5);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-5);
  border-top: 1px solid var(--border-primary);
}

/* ===== Stat block ===== */
.stat-block {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.stat-item {
  text-align: center;
  padding: var(--space-5) var(--space-4);
  background: var(--bg-elevated);
}

.stat-value {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.6875rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

/* ===== Skeleton loader ===== */
.skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== Divider ===== */
.divider {
  height: 1px;
  background: var(--border-primary);
  margin: var(--space-6) 0;
  border: none;
}

.divider-text {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-tertiary);
  font-size: 0.8125rem;
  margin: var(--space-6) 0;
}

.divider-text::before, .divider-text::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-primary);
}

/* ===== Progress ===== */
.progress {
  width: 100%;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--brand-gradient);
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

/* ===== Tooltip ===== */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.6875rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: var(--z-dropdown);
}

[data-tooltip]:hover::after {
  opacity: 1;
}

/* ===== Dark mode — Premium dark glass overrides ===== */
[data-theme="dark"] .btn-primary {
  background: var(--brand-primary);
  color: white;
}

[data-theme="dark"] .btn-primary:hover:not(:disabled) {
  background: var(--brand-primary-hover);
  box-shadow: 0 0 16px rgba(91,110,255,0.25);
}

[data-theme="dark"] .btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
}

[data-theme="dark"] .btn-secondary:hover:not(:disabled) {
  background: var(--bg-elevated);
  border-color: var(--border-secondary);
}

[data-theme="dark"] .btn-ghost {
  color: var(--text-secondary);
}

[data-theme="dark"] .btn-ghost:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

[data-theme="dark"] .card {
  background: var(--bg-card);
  border-color: var(--border-primary);
}

[data-theme="dark"] .card:hover {
  border-color: var(--border-secondary);
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .input,
[data-theme="dark"] .select,
[data-theme="dark"] textarea {
  background: var(--bg-input);
  border-color: var(--border-primary);
  color: var(--text-primary);
}

[data-theme="dark"] .input:focus,
[data-theme="dark"] .select:focus,
[data-theme="dark"] textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(91,110,255,0.15);
}

[data-theme="dark"] .badge {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

[data-theme="dark"] .toast {
  background: var(--bg-elevated);
  border-color: var(--border-primary);
}

[data-theme="dark"] .cmd-palette {
  background: var(--bg-elevated);
  border-color: var(--border-primary);
}

[data-theme="dark"] .cmd-palette-backdrop {
  background: rgba(0,0,0,0.7);
}

[data-theme="dark"] .tabs {
  border-bottom-color: var(--border-primary);
}

[data-theme="dark"] .tab.active {
  color: var(--brand-primary);
  border-bottom-color: var(--brand-primary);
}

[data-theme="dark"] .select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) .btn-primary {
    background: var(--brand-primary);
    color: white;
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .btn-primary:hover:not(:disabled) {
    background: var(--brand-primary-hover);
    box-shadow: 0 0 16px rgba(91,110,255,0.25);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .btn-secondary:hover:not(:disabled) {
    background: var(--bg-elevated);
    border-color: var(--border-secondary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .btn-ghost {
    color: var(--text-secondary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .btn-ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .card {
    background: var(--bg-card);
    border-color: var(--border-primary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .card:hover {
    border-color: var(--border-secondary);
    box-shadow: var(--shadow-lg);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .input,
  :root:not([data-theme="light"]):not([data-theme="dark"]) .select,
  :root:not([data-theme="light"]):not([data-theme="dark"]) textarea {
    background: var(--bg-input);
    border-color: var(--border-primary);
    color: var(--text-primary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .input:focus,
  :root:not([data-theme="light"]):not([data-theme="dark"]) .select:focus,
  :root:not([data-theme="light"]):not([data-theme="dark"]) textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(91,110,255,0.15);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .badge {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .toast {
    background: var(--bg-elevated);
    border-color: var(--border-primary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .cmd-palette {
    background: var(--bg-elevated);
    border-color: var(--border-primary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .cmd-palette-backdrop {
    background: rgba(0,0,0,0.7);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .tabs {
    border-bottom-color: var(--border-primary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .tab.active {
    color: var(--brand-primary);
    border-bottom-color: var(--brand-primary);
  }

  :root:not([data-theme="light"]):not([data-theme="dark"]) .select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  }
}