:root {
  color-scheme: light dark;
  --teal: #0f766e;
  --teal-strong: #0b5e57;
  --on-teal: #ffffff;
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-2: #f8fafb;
  --text: #16201f;
  --text-soft: #5b6b6a;
  --line: #e2e8e7;
  --line-strong: #cbd6d4;
  --danger: #d64545;
  --shadow: 0 1px 2px rgba(16,32,31,.05), 0 8px 24px rgba(16,32,31,.06);
  --radius: 14px;
  --radius-sm: 10px;
  --tap: 44px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --teal: #2dd4bf;
    --teal-strong: #5eead4;
    --on-teal: #06201d;
    --bg: #0c1413;
    --surface: #131e1d;
    --surface-2: #182625;
    --text: #e7efee;
    --text-soft: #9fb2b0;
    --line: #243433;
    --line-strong: #34504d;
    --danger: #ff6b6b;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
[hidden] { display: none !important; }

/* ---------- Botoes ---------- */
.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font: inherit;
  font-weight: 600;
  min-height: var(--tap);
  padding: 0 16px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background .15s, border-color .15s, transform .05s, opacity .15s;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid color-mix(in srgb, var(--teal) 50%, transparent); outline-offset: 2px; }
.btn-primary { background: var(--teal); color: var(--on-teal); }
.btn-primary:hover { background: var(--teal-strong); }
.btn-ghost { background: transparent; color: var(--text-soft); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn[disabled] { opacity: .55; cursor: default; }

input[type="text"], input[type="email"], textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
  width: 100%;
}
input:focus-visible, textarea:focus-visible {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal) 25%, transparent);
}

/* ---------- Login ---------- */
.login {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  gap: 20px;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px;
  width: 100%;
  max-width: 420px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { color: var(--teal); display: inline-flex; }
.login-card h1 { font-size: 1.5rem; margin: 0; letter-spacing: -.01em; }
.login-sub { color: var(--text-soft); margin: 14px 0 22px; }
.field-label { display: block; font-size: .85rem; font-weight: 600; color: var(--text-soft); margin-bottom: 6px; }
#login-form button { width: 100%; margin-top: 14px; }
.login-msg { margin: 16px 0 0; font-size: .95rem; min-height: 1.2em; }
.login-msg.ok { color: var(--teal); }
.login-msg.err { color: var(--danger); }
.login-foot { color: var(--text-soft); font-size: .85rem; }

/* ---------- Topo ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);
}
.topbar-in {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
}
.brand-sm strong { font-size: 1.05rem; letter-spacing: -.01em; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.who { color: var(--text-soft); font-size: .9rem; max-width: 38vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.btn-ghost { min-height: 38px; padding: 0 12px; }

.tabs {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  gap: 4px;
  padding: 0 12px 10px;
  overflow-x: auto;
}
.tab {
  appearance: none;
  background: transparent;
  border: none;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  color: var(--text-soft);
  padding: 8px 16px;
  min-height: 40px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, color .15s;
}
.tab:hover { background: var(--surface-2); color: var(--text); }
.tab[aria-selected="true"] { background: var(--teal); color: var(--on-teal); }
.tab:focus-visible { outline: 3px solid color-mix(in srgb, var(--teal) 50%, transparent); outline-offset: 2px; }

/* ---------- Conteudo ---------- */
.content { max-width: 760px; margin: 0 auto; padding: 18px 16px 80px; }
.add-row { display: flex; gap: 10px; margin-bottom: 18px; align-items: center; flex-wrap: wrap; }
.add-row input[type="text"] { flex: 1; min-width: 0; }
.file-label { cursor: pointer; }
.upload-state { color: var(--text-soft); font-size: .9rem; }
.empty { color: var(--text-soft); text-align: center; padding: 40px 16px; }

/* ---------- Tarefas ---------- */
.tasks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.task {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.task-main { display: flex; align-items: center; gap: 12px; padding: 10px 12px; }

/* Pisco */
.check {
  flex: none;
  width: 26px; height: 26px;
  border-radius: 8px;
  border: 2px solid var(--line-strong);
  background: var(--surface);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background .15s, border-color .15s;
  padding: 0;
}
.check svg { width: 16px; height: 16px; opacity: 0; transform: scale(.5); transition: opacity .15s, transform .15s; }
.check[aria-checked="true"] { background: var(--teal); border-color: var(--teal); color: var(--on-teal); }
.check[aria-checked="true"] svg { opacity: 1; transform: scale(1); }
.check:focus-visible { outline: 3px solid color-mix(in srgb, var(--teal) 50%, transparent); outline-offset: 2px; }

.task-title {
  flex: 1;
  border: none;
  background: transparent;
  padding: 6px 4px;
  font-size: 1.02rem;
  min-width: 0;
}
.task-title:focus-visible { box-shadow: none; outline: none; border-bottom: 2px solid var(--teal); border-radius: 0; }
.task.done .task-title { text-decoration: line-through; color: var(--text-soft); }

.task-tools { display: flex; align-items: center; gap: 2px; flex: none; }
.icon-btn {
  appearance: none; background: transparent; border: none;
  width: 36px; height: 36px; border-radius: 8px;
  color: var(--text-soft); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn:focus-visible { outline: 3px solid color-mix(in srgb, var(--teal) 50%, transparent); outline-offset: 1px; }
.icon-btn.active { color: var(--teal); background: color-mix(in srgb, var(--teal) 12%, transparent); }
.icon-btn svg { width: 19px; height: 19px; }
.icon-btn.danger:hover { color: var(--danger); }

/* Paleta de cores */
.task-extra { border-top: 1px solid var(--line); padding: 0 12px; max-height: 0; overflow: hidden; transition: max-height .2s ease, padding .2s ease; }
.task-extra.open { max-height: 320px; padding: 12px; }
.palette { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 10px; }
.swatch {
  width: 28px; height: 28px; border-radius: 50%;
  border: 2px solid var(--line); cursor: pointer; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
}
.swatch.sel { box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--teal); }
.swatch.clear { background: var(--surface); color: var(--text-soft); font-size: 12px; }
.swatch:focus-visible { outline: 3px solid color-mix(in srgb, var(--teal) 50%, transparent); outline-offset: 2px; }
.note-area { width: 100%; min-height: 72px; resize: vertical; }
.note-label { display: block; font-size: .82rem; font-weight: 600; color: var(--text-soft); margin: 4px 0 6px; }

/* ---------- Documentos ---------- */
.docs { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.doc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
}
.doc-icon { flex: none; color: var(--teal); display: inline-flex; }
.doc-info { flex: 1; min-width: 0; }
.doc-name { font-weight: 600; word-break: break-word; }
.doc-meta { color: var(--text-soft); font-size: .82rem; margin-top: 2px; }
.doc-actions { display: flex; gap: 2px; flex: none; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%; bottom: 24px;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .92rem;
  box-shadow: var(--shadow);
  z-index: 50;
  max-width: 90vw;
}

@media (max-width: 480px) {
  .who { max-width: 30vw; }
  .task-title { font-size: 1rem; }
}