/* ============================================================
   Task Tracker — Premium Dark-Mode Stylesheet
   ============================================================ */

/* ---- Design tokens ---- */
:root {
  --color-bg: #0d0f1a;
  --color-surface: rgba(255, 255, 255, 0.05);
  --color-surface-hover: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-focus: rgba(130, 100, 255, 0.7);

  --color-text-primary: #e8eaf6;
  --color-text-secondary: #9599b3;
  --color-text-muted: #5c6080;

  --color-accent: #7c6aff;
  --color-accent-glow: rgba(124, 106, 255, 0.35);
  --color-accent-light: #a594ff;

  --color-success: #34d399;
  --color-danger: #f87171;
  --color-danger-glow: rgba(248, 113, 113, 0.25);
  --color-warning: #fbbf24;

  --color-orb-1: rgba(124, 106, 255, 0.18);
  --color-orb-2: rgba(56, 189, 248, 0.12);
  --color-orb-3: rgba(52, 211, 153, 0.10);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255,255,255,0.06);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 20px var(--color-accent-glow);

  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---- Reset & base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---- Background orbs ---- */
.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 12s ease-in-out infinite alternate;
}

.orb-1 {
  width: 500px; height: 500px;
  top: -120px; left: -100px;
  background: var(--color-orb-1);
  animation-duration: 14s;
}

.orb-2 {
  width: 400px; height: 400px;
  bottom: -80px; right: -60px;
  background: var(--color-orb-2);
  animation-duration: 10s;
  animation-delay: -3s;
}

.orb-3 {
  width: 300px; height: 300px;
  top: 50%; left: 60%;
  background: var(--color-orb-3);
  animation-duration: 16s;
  animation-delay: -7s;
}

@keyframes float {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, 20px) scale(1.06); }
}

/* ---- Container ---- */
.container {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ---- Header ---- */
.app-header {
  text-align: center;
  padding: 2rem 0 0.5rem;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.logo-icon { font-size: 2rem; }

.app-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #e8eaf6 0%, var(--color-accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.app-subtitle {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.badge {
  display: inline-block;
  padding: 0.15em 0.55em;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-accent), #a594ff);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

/* ---- Stats bar ---- */
.stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1rem 2rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-glass);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
  transition: transform var(--transition-fast);
  display: block;
}

.stat-value.bump {
  animation: bump 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes bump {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.3); }
  100% { transform: scale(1); }
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.stat-divider {
  width: 1px;
  height: 2rem;
  background: var(--color-border);
}

/* ---- Add task form ---- */
.add-task-section {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.add-task-form {
  display: flex;
  gap: 0.75rem;
}

.task-input {
  flex: 1;
  height: 48px;
  padding: 0 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.task-input::placeholder { color: var(--color-text-muted); }

.task-input:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.task-input.error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px var(--color-danger-glow);
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.input-error {
  font-size: 0.8rem;
  color: var(--color-danger);
  min-height: 1.2em;
  padding-left: 0.25rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0 1.2rem;
  height: 48px;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.btn:active { transform: scale(0.96); }

.btn-icon { font-size: 1.15em; font-weight: 400; }

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), #a594ff);
  color: #fff;
  box-shadow: 0 4px 14px var(--color-accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px var(--color-accent-glow);
  transform: translateY(-1px);
}

.btn-danger {
  background: rgba(248, 113, 113, 0.12);
  color: var(--color-danger);
  border: 1px solid rgba(248, 113, 113, 0.25);
}

.btn-danger:hover {
  background: rgba(248, 113, 113, 0.2);
  box-shadow: 0 4px 16px var(--color-danger-glow);
  transform: translateY(-1px);
}

.btn-icon-sm {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.btn-icon-sm:hover {
  background: var(--color-danger-glow);
  color: var(--color-danger);
}

/* ---- Task list ---- */
.task-list-section { min-height: 60px; }

.task-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  animation: slide-in var(--transition-slow) backwards;
}

.task-item:hover {
  background: var(--color-surface-hover);
  transform: translateX(2px);
  box-shadow: var(--shadow-glass);
}

@keyframes slide-in {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.task-item.removing {
  animation: remove-out 0.3s ease forwards;
}

@keyframes remove-out {
  to { opacity: 0; transform: scale(0.95) translateX(-10px); max-height: 0; margin: 0; padding: 0; }
}

/* Checkbox */
.task-checkbox {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  appearance: none;
  -webkit-appearance: none;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.task-checkbox:hover { border-color: var(--color-accent); }

.task-checkbox:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.task-checkbox:checked::after {
  content: '✓';
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Task text */
.task-text {
  flex: 1;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  word-break: break-word;
  transition: color var(--transition-fast), text-decoration var(--transition-fast);
}

.task-item.done .task-text {
  color: var(--color-text-muted);
  text-decoration: line-through;
}

/* Task meta */
.task-meta {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ---- Empty state ---- */
.empty-state {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 3rem 1rem;
  text-align: center;
}

.empty-state.visible { display: flex; }

.empty-icon { font-size: 3rem; opacity: 0.4; }

.empty-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.empty-hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: 28ch;
}

/* ---- Actions footer ---- */
.task-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---- WebMCP status ---- */
.webmcp-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-text-muted);
  flex-shrink: 0;
}

.webmcp-status.active .status-dot {
  background: var(--color-success);
  box-shadow: 0 0 6px var(--color-success);
  animation: pulse 2s ease infinite;
}

.webmcp-status.active .status-label { color: var(--color-success); }

.webmcp-status.inactive .status-dot { background: var(--color-danger); }
.webmcp-status.inactive .status-label { color: var(--color-danger); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* ---- Agent toast ---- */
.agent-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(calc(100% + 2rem));
  background: rgba(20, 22, 40, 0.95);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-glass);
  white-space: nowrap;
  max-width: calc(100vw - 2rem);
  overflow: hidden;
  text-overflow: ellipsis;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.35s ease;
  opacity: 0;
  z-index: 100;
}

.agent-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  .add-task-form { flex-direction: column; }
  .btn-primary { width: 100%; justify-content: center; }
  .stats-bar { padding: 0.75rem 1rem; gap: 1rem; }
  .stat-value { font-size: 1.3rem; }
}