:root{
  --bg: #f9f9fb;
  --panel: #ffffff;
  --muted: #666666;
  --text: #222222;
  --primary: #f7c948;        /* golden yellow */
  --primary-2: #f4b400;      /* deeper gold */
  --accent: #4cd964;         /* green accent */
  --danger: #ff4d4d;         /* bright red */
  --ring: rgba(247, 201, 72, .35);
  --shadow: 0 8px 22px rgba(0,0,0,.15), 0 2px 8px rgba(0,0,0,.08);
  --radius-xl: 18px;
  --radius-lg: 12px;
  --radius-md: 10px;
  --gap: 14px;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 700px at 20% -10%, #fff6d5 0%, transparent 60%),
              radial-gradient(1000px 600px at 120% 0%, #d8ffd8 0%, transparent 55%),
              var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  line-height: 1.45;
}

/* Screenreader-only */
.sr-only{
  position:absolute !important;
  width:1px;height:1px;
  padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0;
}

.app{
  width:min(900px, 92vw);
  margin: clamp(18px, 6vw, 54px) auto;
  background: linear-gradient(180deg, #fff7e6 0%, #f0fff4 100%);
  border: 1px solid rgba(0,0,0,.05);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  overflow: clip;
}

.app__header{
  padding: 28px clamp(18px, 4vw, 32px) 10px;
  border-bottom: 1px solid rgba(0,0,0,.08);
  background:
    radial-gradient(500px 200px at 0% 0%, rgba(247,201,72,.18), transparent 70%),
    radial-gradient(400px 200px at 100% 0%, rgba(76,217,100,.12), transparent 70%),
    linear-gradient(180deg, rgba(255,255,255,.5), rgba(255,255,255,0));
}
.app__header h1{
  margin:0 0 4px 0;
  letter-spacing: .4px;
  font-size: clamp(26px, 3.6vw, 34px);
  font-weight: 700;
}
.tagline{
  margin:0;
  color: var(--primary-2);
  font-size: clamp(12px, 2.2vw, 14px);
}

.composer{
  padding: 16px clamp(16px, 4vw, 32px) 8px;
}
#todo-form{
  display:flex;
  gap: var(--gap);
}
#task-input{
  flex:1;
  padding: 14px 16px;
  border-radius: var(--radius-lg);
  background: #fffdf0;
  color: var(--text);
  border: 1px solid transparent;
  outline: none;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.06);
}
#task-input::placeholder{ color: #999; }
#task-input:focus{
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--ring), inset 0 0 0 1px rgba(0,0,0,.06);
}

.btn{
  display:inline-flex; align-items:center; gap:10px;
  border:1px solid transparent;
  height:46px; padding: 0 16px;
  border-radius: var(--radius-md);
  cursor:pointer;
  font-weight: 600;
  letter-spacing:.2px;
  transition: transform .06s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, opacity .2s ease;
  user-select:none;
  white-space:nowrap;
}
.btn:active{ transform: translateY(1px) scale(.995); }
.btn i{ font-size: 14px; }

.btn--primary{
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-2) 100%);
  color:#fff;
  box-shadow: 0 6px 16px rgba(247,201,72,.35);
}
.btn--primary:hover{ filter: brightness(1.05); }

.btn--danger{
  background: linear-gradient(180deg, #ff6b6b 0%, #ff4444 100%);
  color:#fff;
}
.btn--danger:hover{ filter: brightness(1.05); }

.btn--ghost{
  background: transparent;
  color: var(--text);
  border-color: rgba(0,0,0,.12);
}
.btn--ghost:hover{ background: rgba(0,0,0,.06); }

.controls{
  display:flex; gap: var(--gap);
  align-items:center; justify-content: space-between;
  padding: 4px clamp(16px, 4vw, 32px) 12px;
  flex-wrap: wrap;
}
.filters{
  display:flex; gap: 8px;
  flex-wrap: wrap;
}
.chip{
  border:1px solid var(--primary-2);
  background: #fff8dc;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 999px;
  cursor:pointer;
  font-weight: 500;
}
.chip:hover{ border-color: var(--primary); }
.chip.is-active{
  background: linear-gradient(180deg, #ffe066, #ffd633);
  border-color: var(--primary);
  color: #222;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.06), 0 4px 16px rgba(247,201,72,.25);
}

.search-wrap input{
  width: 240px; max-width: 70vw;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  background: #fffdf0;
  border: 1px solid var(--primary-2);
  color: var(--text);
}
.search-wrap input::placeholder{ color:#888; }
.search-wrap input:focus{
  outline:none;
  border-color: var(--primary-2);
  box-shadow: 0 0 0 3px var(--ring);
}

.list-wrap{
  padding: 6px clamp(12px, 4vw, 28px) 4px;
  min-height: 140px;
}
.task-list{
  list-style:none; padding:0; margin:0;
  display:flex; flex-direction: column; gap: 10px;
}
.task{
  display:grid;
  grid-template-columns: 28px 1fr auto;
  gap: 12px;
  align-items:center;
  padding: 12px 14px;
  background: linear-gradient(180deg, #ffffff, #fefae0);
  border:1px solid rgba(0,0,0,.08);
  border-radius: var(--radius-lg);
  box-shadow: 0 6px 12px rgba(0,0,0,.08);
  transform-origin: top left;
  animation: pop-in .18s ease-out both;
}
.task.exit{
  animation: fly-out .22s ease-in forwards;
}
.task__title{
  margin:0; color: var(--text);
  word-break: break-word;
}
.task__meta{
  display:flex; gap: 10px;
  font-size: 12px; color: var(--muted);
}
.task__actions{
  display:flex; gap: 8px; align-items:center;
}

.icon-btn{
  width:36px; height:36px;
  display:grid; place-items:center;
  border-radius: 10px;
  border:1px solid rgba(0,0,0,.12);
  background:#fff8dc; color: #444;
  cursor:pointer;
  transition: transform .06s ease, background .2s ease, border-color .2s ease, opacity .2s ease;
}
.icon-btn:hover{ background:#fff1b3; border-color: var(--primary-2); }
.icon-btn:active{ transform: translateY(1px) scale(.98); }
.icon-btn--complete{ border-color: rgba(76,217,100,.4); }
.icon-btn--delete{ border-color: rgba(255,77,77,.4); }

.checkbox{
  appearance: none;
  width: 20px; height: 20px;
  border-radius: 6px;
  background: #fffdf0;
  border:1px solid rgba(0,0,0,.2);
  display:grid; place-items:center;
  cursor:pointer;
  transition: background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.checkbox:checked{
  background: linear-gradient(180deg, var(--accent), #2ecc71);
  border-color: #2ecc71;
  box-shadow: 0 0 0 3px rgba(76,217,100,.28);
}
.checkbox:checked::after{
  content:"\f00c";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color:#fff;
  font-size: 12px;
}

.task.done .task__title{
  color: #999;
  text-decoration: line-through;
  text-decoration-thickness: 2px;
  text-decoration-color: rgba(0,0,0,.25);
}

.empty{
  text-align:center;
  color: var(--muted);
  padding: 24px 8px 10px;
}
.empty i{ font-size: 32px; display:block; margin-bottom: 6px; }
.hidden{ display:none !important; }

.app__footer{
  display:flex; align-items:center; justify-content: space-between;
  gap: 10px;
  padding: 14px clamp(14px, 4vw, 28px) 18px;
  border-top: 1px solid rgba(0,0,0,.08);
  background: linear-gradient(180deg, rgba(255,255,255,.5), rgba(255,255,255,0));
}
.status{ color: var(--muted); font-size: 14px; }
.actions{ display:flex; gap: 10px; flex-wrap: wrap; }

/* Animations */
@keyframes pop-in{
  from{ opacity:0; transform: translateY(-6px) scale(.98); }
  to{ opacity:1; transform: translateY(0) scale(1); }
}
@keyframes fly-out{
  to{ opacity:0; transform: translateX(8px) translateY(-6px) scale(.98); }
}

/* Responsive tweaks */
@media (max-width: 520px){
  .actions{ width:100%; justify-content: space-between; }
  .search-wrap input{ width: 100%; }
  #todo-form{ flex-wrap: wrap; }
  #add-btn{ width: 100%; justify-content: center; }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
}