*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #111827;
  color: #f9fafb;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ── */

.wrap { max-width: 560px; margin: 0 auto; padding: 2.5rem 1.25rem 5rem; }

/* ── Header ── */

.site-header {
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header h1 {
  font-size: .8125rem;
  font-weight: 500;
  color: #6c63ff;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-family: ui-monospace, monospace;
}
.header-nav { display: flex; gap: 1rem; align-items: center; }
.username {
  font-size: .75rem;
  color: #6b7280;
  font-family: ui-monospace, monospace;
}
.logout-btn {
  font-size: .75rem;
  font-family: ui-monospace, monospace;
  color: #4b5563;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.logout-btn:hover { color: #9ca3af; }

/* ── Login box ── */

.login-box {
  margin-top: 4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.btn-login {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: #6c63ff;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: .75rem 1.75rem;
  font-size: .9375rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s;
}
.btn-login:hover { background: #5a52e0; }
.btn-login:disabled { opacity: .5; cursor: not-allowed; }

/* ── Compose ── */

.compose { margin-bottom: 1.25rem; }
.compose-row {
  display: flex;
  gap: .5rem;
}
.compose-row input[type="text"] {
  flex: 1;
  background: #1f2937;
  border: 1px solid #374151;
  color: #f9fafb;
  border-radius: 8px;
  padding: .625rem .875rem;
  font-size: .9375rem;
  font-family: inherit;
  outline: none;
  transition: border-color .15s;
}
.compose-row input[type="text"]:focus { border-color: #6c63ff; }
.compose-row input[type="text"]::placeholder { color: #4b5563; }
.compose-row button[type="submit"] {
  background: #6c63ff;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: .625rem 1.125rem;
  font-size: .875rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s;
}
.compose-row button[type="submit"]:hover { background: #5a52e0; }
.compose-row button[type="submit"]:disabled { opacity: .5; cursor: not-allowed; }

/* ── Filters ── */

.filters {
  display: flex;
  gap: .25rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid #1f2937;
  padding-bottom: .5rem;
}
.filters a {
  font-size: .8125rem;
  color: #6b7280;
  text-decoration: none;
  padding: .25rem .625rem;
  border-radius: 4px;
  transition: color .15s;
}
.filters a:hover { color: #d1d5db; }
.filters a.active {
  color: #6c63ff;
  background: rgba(108, 99, 255, .12);
}

/* ── Todo list ── */

.todo-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .125rem;
}

.todo-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem .5rem;
  border-radius: 6px;
  transition: background .1s;
}
.todo-item:hover { background: #1f2937; }

.toggle-form, .delete-form { display: contents; }

.checkbox {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  color: inherit;
}

.todo-title {
  flex: 1;
  font-size: .9375rem;
  color: #e5e7eb;
  word-break: break-word;
}
.todo-item.done .todo-title {
  color: #4b5563;
  text-decoration: line-through;
}

.delete-btn {
  flex-shrink: 0;
  background: none;
  border: none;
  color: #374151;
  cursor: pointer;
  font-size: 1.125rem;
  padding: 0 .25rem;
  line-height: 1;
  opacity: 0;
  transition: color .15s, opacity .15s;
}
.todo-item:hover .delete-btn { opacity: 1; }
.delete-btn:hover { color: #f87171; }

/* ── Footer ── */

.todo-footer {
  margin-top: 1rem;
  font-size: .75rem;
  color: #4b5563;
  font-family: ui-monospace, monospace;
  padding-left: .5rem;
}

/* ── Empty state ── */

.empty {
  color: #374151;
  font-size: .875rem;
  padding: 2.5rem 0;
  text-align: center;
  list-style: none;
}

/* ── Error ── */

.error-msg {
  font-size: .8125rem;
  color: #f87171;
  margin-top: .5rem;
}

/* ── Auth pages ── */

.auth-box { max-width: 360px; }
.auth-box h2 { font-size: 1.125rem; font-weight: 600; margin-bottom: .5rem; }
.auth-box p { font-size: .875rem; color: #6b7280; margin-bottom: 1.5rem; line-height: 1.6; }

.field-group { display: flex; flex-direction: column; gap: .5rem; margin-bottom: 1rem; }
.field-group input {
  background: #1f2937;
  border: 1px solid #374151;
  color: #f9fafb;
  border-radius: 8px;
  padding: .625rem .875rem;
  font-size: .9375rem;
  font-family: inherit;
  outline: none;
  transition: border-color .15s;
}
.field-group input:focus { border-color: #6c63ff; }
.field-group input::placeholder { color: #4b5563; }

.btn {
  display: inline-block;
  background: #6c63ff;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: .625rem 1.375rem;
  font-size: .9375rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s;
}
.btn:hover { background: #5a52e0; }
.btn:disabled { opacity: .5; cursor: not-allowed; }