/* ===========================
   CSS RESET
=========================== */

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

/* ===========================
   CSS VARIABLES
=========================== */

:root {
  --bg-color: #f4f4f4;
  --card-color: #ffffff;
  --text-color: #333333;
  --primary-color: #4caf50;
  --primary-hover: #43a047;
  --border-color: #dddddd;
  --input-bg: #ffffff;
  --danger-color: #e53935;
  --danger-hover: #c62828;
}

/* ===========================
   GLOBAL
=========================== */

body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  padding: 30px;
}

main {
  max-width: 700px;
  margin: auto;
  background: var(--card-color);
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* ===========================
   HEADER
=========================== */

header {
  text-align: center;
  margin-bottom: 25px;
}

header h1 {
  margin-bottom: 10px;
}

header p {
  color: #777;
  margin-bottom: 15px;
}

#theme-toggle {
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: var(--primary-color);
  color: white;
  transition: 0.3s;
}

#theme-toggle:hover {
  background: var(--primary-hover);
}

/* ===========================
   FORM
=========================== */

#todo-form {
  display: flex;
  gap: 10px;
  align-items: center;
}

#todo-form label {
  font-weight: bold;
}

#todo-input {
  flex: 1;
}

input[type="text"] {
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text-color);
}

button {
  padding: 10px 16px;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  background: var(--primary-color);
  color: white;
  transition: 0.3s;
}

button:hover {
  background: var(--primary-hover);
}

/* ===========================
   SECTIONS
=========================== */

section {
  margin-top: 20px;
}

/* ===========================
   SEARCH
=========================== */

#search-section {
  display: flex;
  align-items: center;
  gap: 10px;
}

#search-input {
  flex: 1;
}

/* ===========================
   FILTERS
=========================== */

#filters {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.filter-button.active {
  background: #2196f3;
}

/* ===========================
   TASK LIST
=========================== */

#todo-list {
  list-style: none;
}

.todo-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  margin-top: 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.task-content {
  display: flex;
  align-items: center;
  gap: 10px;
}

.task-title.completed {
  text-decoration: line-through;
  color: gray;
}

.edit-input {
  width: 250px;
}

.task-actions {
  display: flex;
  gap: 8px;
}

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

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

.empty-message {
  text-align: center;
  padding: 20px;
  color: gray;
}

/* ===========================
   STATS
=========================== */

#stats {
  display: flex;
  justify-content: space-around;
  margin-top: 25px;
  font-weight: bold;
}
.stats-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  font-weight: bold;
  padding: 10px;
  border-top: 1px solid var(--border-color);
  margin-top: 20px;
}

.stats-container p {
  background: var(--bg-color);
  padding: 8px 12px;
  border-radius: 6px;
}
/* ===========================
   FOOTER
=========================== */
#clear-all {
  margin-top: 15px;
  background: var(--danger-color);
  color: white;
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  border: none;
  transition: 0.3s;
}

#clear-all:hover {
  background: var(--danger-hover);
}

footer {
  margin-top: 30px;
  text-align: center;
  color: gray;
}

/* ===========================
   DARK MODE
=========================== */

.dark-theme {
  --bg-color: #121212;
  --card-color: #1e1e1e;
  --text-color: #f5f5f5;
  --border-color: #333333;
  --input-bg: #2a2a2a;

  --primary-color: #4caf50;
  --primary-hover: #43a047;
}