/* CSS Variables for theming */
:root {
  --bg: #0f1226;
  --bg-soft: rgba(255,255,255,0.08);
  --card: rgba(255,255,255,0.12);
  --text: #e9ecf1;
  --muted: #b9c0cf;
  --accent: #7c6cff;
  --danger: #ff6b6b;
  --ring: rgba(124,108,255,0.45);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}
/* Light theme overrides */
[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-soft: rgba(0,0,0,0.04);
  --card: #ffffff;
  --text: #16181d;
  --muted: #586174;
  --accent: #6a5cff;
  --danger: #e05252;
  --ring: rgba(106,92,255,0.35);
  --shadow: 0 10px 25px rgba(16,24,40,0.12);
}

/* Basic page setup */
html, body {
  height: 100%;
}
body {
  margin: 0;
  font-family: system-ui, Inter, Arial;
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, #4a3cff44, transparent),
              radial-gradient(800px 600px at 110% 10%, #16b5ea35, transparent),
              linear-gradient(180deg, var(--bg) 0%, var(--bg) 100%);
  display: grid;
  place-items: center;
  padding: 24px;
}

/* Main app container */
.app {
  width: min(720px, 100%);
  background: var(--card);
  border-radius: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--bg-soft);
}

/* Top bar with brand and theme toggle */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  gap: 12px;
  border-bottom: 1px solid var(--bg-soft);
}

/* Brand section */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: conic-gradient(from 210deg, var(--accent), #5ee0ff, var(--accent));
  box-shadow: 0 8px 18px var(--ring);
}
h1 {
  font-size: 20px;
  margin: 0;
}
/* Icon button for theme toggle */
.icon-btn {
  border: 1px solid var(--bg-soft);
  background: #0000;
  color: var(--text);
  padding: 8px 10px;
  border-radius: 12px;
  cursor: pointer;
}
/* Main content wrapper */
.wrap {
  padding: 18px;
  display: grid;
  gap: 14px;
}

/* Add new task form */
.add-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
}
.input, .date-input {
  background: #0000;
  border: 1.5px solid var(--bg-soft);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 14px;
  outline: none;
}
.date-input {
  font-size: 14px;
}
.add-btn {
  background: var(--accent);
  color: white;
  border: 0;
  padding: 12px 16px;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 600;
}

/* Controls section with filters and count */
.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.pill {
  border: 1px solid var(--bg-soft);
  background: #0000;
  color: var(--text);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
}
.pill.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--ring);
}
.minor {
  color: var(--muted);
  font-size: 13px;
}

/* Todo list */
.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.item {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--bg-soft);
  border-radius: 14px;
  padding: 10px 12px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
}
.completed .text {
  text-decoration: line-through;
  color: var(--muted);
}
.due {
  font-size: 12px;
  color: var(--muted);
  margin-left: 8px;
}
.check input {
  width: 20px;
  height: 20px;
}
.del {
  border: 1px solid var(--bg-soft);
  background: none;
  color: var(--danger);
  padding: 6px 10px;
  border-radius: 10px;
  cursor: pointer;
}

/* Empty state message */
.empty {
  text-align: center;
  padding: 32px;
  border: 1px dashed var(--bg-soft);
  border-radius: 14px;
  color: var(--muted);
}

/* Mobile responsive adjustments */
@media (max-width: 520px) {
  .add-row {
    grid-template-columns: 1fr;
  }
}