@import url('https://fonts.googleapis.com/css2?family=Heebo:wght@400;500;600;700;800&display=swap');

:root {
  --accent: #5274dd;
  --accent-hover: #3f60c8;
  --accent-soft: #eef2ff;
  --accent-glow: #dce9ff;
  --surface: rgba(255, 255, 255, .86);
  --surface-strong: #fff;
  --border: #e4e9f2;
  --danger: #e45565;
  font-family: 'Heebo', Arial, sans-serif;
  color: #172033;
  background: #f5f7fb;
}
body.theme-red {
  --accent: #e5484d;
  --accent-hover: #c92f36;
  --accent-soft: #fff0f1;
  --accent-glow: #ffd9dc;
  --danger: #b4232b;
}
body.theme-purple {
  --accent: #8b5cf6;
  --accent-hover: #7347d9;
  --accent-soft: #f3efff;
  --accent-glow: #e5d8ff;
  --danger: #e45565;
}
body.theme-blue {
  --accent: #5274dd;
  --accent-hover: #3f60c8;
  --accent-soft: #eef2ff;
  --accent-glow: #dce9ff;
  --danger: #e45565;
}
body.theme-green {
  --accent: #18a058;
  --accent-hover: #128048;
  --accent-soft: #eaf8f0;
  --accent-glow: #c8f0d8;
  --danger: #d14343;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 85% 0%, var(--accent-glow) 0, transparent 30%), linear-gradient(180deg, #f8faff 0%, #eef3f8 100%); }
.app { width: min(100% - 32px, 720px); margin: 0 auto; padding: 64px 0 72px; }
.hero { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 28px; }
.eyebrow { color: var(--accent); font-size: .82rem; font-weight: 800; margin: 0 0 6px; text-transform: uppercase; }
h1 { font-size: clamp(2rem, 6vw, 3rem); line-height: 1.15; margin: 0; letter-spacing: 0; }
.subtitle { color: #687386; margin: 10px 0 0; font-size: 1.05rem; }
.date { color: #687386; font-size: .9rem; white-space: nowrap; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 8px 12px; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 18px; box-shadow: 0 18px 45px #243b6314; backdrop-filter: blur(12px); }
form { display: flex; gap: 10px; }
input { min-width: 0; flex: 1; background: var(--surface-strong); border: 1px solid #dfe5ef; border-radius: 12px; padding: 14px 16px; font: inherit; font-size: 1rem; outline: 0; transition: .2s; }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
button { border: 0; cursor: pointer; font: inherit; transition: .2s; }
form button { background: var(--accent); color: #fff; border-radius: 12px; padding: 0 22px; font-weight: 800; white-space: nowrap; box-shadow: 0 10px 22px color-mix(in srgb, var(--accent) 24%, transparent); }
form button:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 12px 26px color-mix(in srgb, var(--accent) 30%, transparent); }
.toolbar { display: flex; justify-content: space-between; align-items: center; color: #7b8494; font-size: .9rem; margin-top: 18px; }
.filters { display: flex; gap: 4px; }
.filter { background: transparent; color: #7b8494; padding: 6px 10px; border-radius: 8px; }
.filter:hover, .filter.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.task-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 12px; }
.task { background: var(--surface-strong); border: 1px solid var(--border); border-right: 5px solid var(--accent); border-radius: 12px; display: flex; align-items: center; gap: 12px; padding: 15px 16px; box-shadow: 0 8px 22px #243b630a; }
.task:hover { transform: translateY(-1px); box-shadow: 0 12px 28px #243b6310; }
.task.completed .task-text { color: #9da5b2; text-decoration: line-through; }
.check { width: 22px; height: 22px; flex: 0 0 22px; border: 2px solid #cbd3e1; border-radius: 50%; background: #fff; }
.check:hover { border-color: var(--accent); }
.completed .check { background: var(--accent); border-color: var(--accent); position: relative; }
.completed .check::after { content: '✓'; color: #fff; font-size: 14px; position: absolute; inset: -2px 0 0; text-align: center; }
.task-text { flex: 1; overflow-wrap: anywhere; }
.delete { color: #aab2c0; background: transparent; border-radius: 8px; font-size: 1.2rem; padding: 3px 7px; }
.delete:hover { color: var(--danger); background: #fff1f2; }
.empty-state { text-align: center; color: #7b8494; padding: 55px 20px; }
.empty-icon { width: 56px; height: 56px; margin: 0 auto 14px; display: grid; place-items: center; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-size: 1.7rem; box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 12%, transparent); }
.empty-state h2 { color: #344055; margin: 0; font-size: 1.25rem; }
.empty-state p { margin: 6px 0; }
.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; }
@media (max-width: 560px) { .app { padding-top: 32px; } .hero { display: block; } .date { margin-top: 10px; } form { flex-direction: column; } form button { padding: 12px; } .toolbar { align-items: flex-start; gap: 12px; flex-direction: column-reverse; } }