:root {
      --bg-black: #0b0c10;
      --bg-card: #141620;
      --blue-primary: #2563eb;
      --blue-hover: #1d4ed8;
      --border-color: #1f2330;
      --text-main: #ffffff;
      --text-muted: #8892b0;
      --danger: #dc2626;
      --success: #16a34a;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Plus Jakarta Sans', sans-serif;
  letter-spacing: -0.04em;
}

body {
  background-color: var(--bg-black);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 3rem 1rem;
}

header {
  width: 100%;
  max-width: 550px;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--blue-primary);
  margin-bottom: 0.25rem;
}

header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.container {
  width: 100%;
  max-width: 550px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1.25rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--blue-primary);
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  background-color: var(--bg-black);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.6rem 0.8rem;
  color: var(--text-main);
  font-size: 0.95rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--blue-primary);
}

textarea.form-control {
  resize: none;
  min-height: 80px;
}

.btn {
  width: 100%;
  background-color: var(--blue-primary);
  color: var(--text-main);
  border: none;
  border-radius: 4px;
  padding: 0.7rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover {
  background-color: var(--blue-hover);
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.task-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.9rem;
  background-color: var(--bg-black);
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.checkbox-container {
  display: flex;
  align-items: center;
  height: 20px;
}

.task-checkbox {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--blue-primary);
  cursor: pointer;
}

.task-content {
  flex-grow: 1;
}

.task-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.task-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.task-completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-completed .task-desc {
  color: #525252;
}

.btn-delete {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.2rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.btn-delete:hover {
  color: var(--danger);
}

.empty-state {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Status Info */
.status-msg {
  font-size: 0.85rem;
  padding: 0.5rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  display: none;
  font-weight: 500;
}

.status-success {
  background-color: rgba(22, 163, 74, 0.1);
  border: 1px solid var(--success);
  color: var(--success);
  display: block;
}

.status-danger {
  background-color: rgba(220, 38, 38, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
  display: block;
}