@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600&display=swap");

:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #22c55e;
  --danger: #f43f5e;
  --high: #f97316;
  --low: #38bdf8;
  --border: #1f2937;
  --shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --chip: #1e293b;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  background: radial-gradient(120% 100% at 10% 20%, rgba(34, 197, 94, 0.15), transparent),
              radial-gradient(120% 100% at 80% 0%, rgba(56, 189, 248, 0.12), transparent),
              linear-gradient(180deg, #0b1220 0%, #0f172a 70%);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 32px 16px 48px;
}

.app {
  width: min(900px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 28px 18px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.header h1 {
  margin: 4px 0 0;
  font-size: 28px;
  letter-spacing: -0.02em;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.composer {
  display: grid;
  grid-template-columns: 1fr 120px 96px;
  gap: 10px;
  align-items: center;
  margin: 14px 0 12px;
}

input,
select,
button {
  font: inherit;
  color: var(--text);
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1220;
  padding: 12px 14px;
}

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

select {
  cursor: pointer;
}

.edit-input {
  background: #0b1220;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 8px;
}

button {
  cursor: pointer;
  border: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.2s ease;
}

button:active {
  transform: translateY(1px);
}

.primary {
  background: linear-gradient(120deg, var(--accent), #16a34a);
  color: #04230e;
  font-weight: 600;
  box-shadow: 0 12px 22px rgba(34, 197, 94, 0.2);
}

.ghost {
  background: var(--chip);
  color: var(--text);
  border: 1px solid var(--border);
}

.ghost.danger {
  color: var(--danger);
  border-color: rgba(244, 63, 94, 0.4);
}

.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin: 12px 0 6px;
}

.filters {
  display: flex;
  gap: 8px;
}

.chip {
  background: var(--chip);
  border: 1px solid var(--border);
  padding: 10px 14px;
}

.chip.active {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 10px 20px rgba(34, 197, 94, 0.18);
}

.todo-list {
  list-style: none;
  margin: 14px 0 10px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.howto {
  margin: 10px 0 14px;
  padding: 14px 16px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  background: rgba(30, 41, 59, 0.6);
}

.howto h2 {
  margin: 0 0 8px;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.howto ol {
  margin: 0 0 0 16px;
  padding: 0;
  color: var(--muted);
  line-height: 1.5;
}

.todo-item {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #0c1424;
}

.todo-item.completed {
  opacity: 0.65;
}

.todo-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.title {
  margin: 0;
  font-size: 16px;
  word-break: break-word;
}

.meta {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.priority {
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
  color: #0b1220;
}

.priority.high {
  background: var(--high);
}

.priority.normal {
  background: var(--accent);
}

.priority.low {
  background: var(--low);
}

.icon-btn {
  min-width: 40px;
  height: 36px;
  display: grid;
  place-items: center;
  padding: 0 10px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.35);
  transition: transform 0.1s ease, box-shadow 0.15s ease, filter 0.15s ease, border-color 0.2s ease;
}

.icon-btn:hover,
.icon-btn:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.45);
  filter: brightness(1.08);
  outline: none;
}

.icon-btn.edit-btn {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.22), rgba(34, 197, 94, 0.18));
  border-color: rgba(56, 189, 248, 0.4);
  color: #e0faff;
}

.icon-btn.edit-btn:hover,
.icon-btn.edit-btn:focus-visible {
  border-color: rgba(56, 189, 248, 0.7);
}

.icon-btn.delete-btn {
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.26), rgba(244, 63, 94, 0.16));
  border-color: rgba(244, 63, 94, 0.55);
  color: #ffe5ea;
}

.icon-btn.delete-btn:hover,
.icon-btn.delete-btn:focus-visible {
  border-color: rgba(244, 63, 94, 0.8);
  filter: brightness(1.12);
}

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}

.hint {
  margin: 0;
}

@media (max-width: 680px) {
  .composer {
    grid-template-columns: 1fr;
  }

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

  .todo-item {
    grid-template-columns: auto 1fr auto;
    grid-template-areas:
      "check title actions"
      "check meta actions";
    align-items: start;
  }

  .title {
    grid-area: title;
  }

  .meta {
    grid-area: meta;
  }
}