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

:root {
  --bg: #ece7df;
  --card-bg: #f8f3ec;
  --card-border: #d8cfc2;
  --text-main: #1f1a17;
  --text-secondary: #665f58;
  --text-muted: #8b857f;

  --priority-bg: #fbe9e2;
  --priority-text: #b4542f;

  --status-bg: #fdf3df;
  --status-text: #9a650d;

  --tag-bg: #ebe4db;
  --tag-text: #5f5851;

  --description-bg: #f2ebe2;

  --edit-bg: #1f1a17;
  --edit-text: #ffffff;

  --delete-bg: #fff7f5;
  --delete-text: #b33f2e;
  --delete-border: #efc8c0;

  --focus: #2563eb;
  --shadow: 0 10px 30px rgba(31, 26, 23, 0.08);
  --radius: 18px;
  --radius-sm: 10px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "DM Sans", Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text-main);
}

.page {
  width: 100%;
  padding: 24px 16px 40px;
}

.page-title {
  margin: 0 0 18px;
  text-align: center;
  font-size: 1.8rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.todo-card {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  overflow: hidden;
}

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

.todo-card.completed .todo-description {
  opacity: 0.8;
}

.todo-card.completed .status-badge {
  background: #e7f6ec;
  color: #2f7a4b;
}

.todo-main {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.todo-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
}

.todo-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
  accent-color: #2f6fed;
  flex-shrink: 0;
}

.todo-toggle label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.todo-content {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.todo-title {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  word-break: break-word;
}

.todo-description {
  margin: 0;
  padding: 14px 16px;
  font-size: 0.89rem;
  background: var(--description-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  line-height: 1.65;
  word-break: break-word;
}

.todo-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.priority-badge {
  background: var(--priority-bg);
  color: var(--priority-text);
}

.status-badge {
  background: var(--status-bg);
  color: var(--status-text);
}

.todo-time-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.todo-due-date,
.todo-time-remaining {
  font-size: 0.89rem;
  color: var(--text-secondary);
}

.todo-time-remaining {
  font-size: 0.89rem;
  font-weight: 700;
  color: var(--text-main);
}

.todo-footer {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--card-border);
}

.todo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag {
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 0.82rem;
  font-weight: 600;
}

.todo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.action-button {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 16px;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    opacity 0.15s ease,
    background-color 0.15s ease;
}

.edit-button {
  font-size: 0.89rem;
  background: var(--edit-bg);
  color: var(--edit-text);
}

.delete-button {
  font-size: 0.89rem;
  background: var(--delete-bg);
  color: var(--delete-text);
  border-color: var(--delete-border);
}

.action-button:hover {
  opacity: 0.92;
}

.action-button:active {
  transform: scale(0.98);
}

input[type="checkbox"]:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.todo-meta {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.priority-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--priority-text);
  flex-shrink: 0;
  display: inline-block;
}

.todo-status-control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.todo-status-control-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.todo-status-control {
  width: 100%;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: #fff;
  padding: 12px 14px;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-main) 50%),
    linear-gradient(135deg, var(--text-main) 50%, transparent 50%);
  background-position:
    calc(100% - 20px) calc(50% - 3px),
    calc(100% - 14px) calc(50% - 3px);
  background-size:
    6px 6px,
    6px 6px;
  background-repeat: no-repeat;
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.todo-status-control:hover {
  border-color: #b9ae9f;
}

.todo-status-control:focus-visible {
  outline: none;
  border-color: var(--focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.todo-description-wrapper {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.todo-collapsible-section {
  overflow: hidden;
  transition: max-height 0.25s ease;
}

.todo-collapsible-section.collapsed {
  max-height: 60px;
}

.expand-toggle {
  align-self: flex-start;
  border: none;
  background: transparent;
  padding: 0;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--priority-text);
  cursor: pointer;
}

.todo-overdue-indicator {
  display: none;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--delete-text);
}

.todo-overdue-indicator.visible {
  display: inline-flex;
}

.todo-edit-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 24px;
  padding: 24px 0 0;
  border-top: 1px solid var(--card-border);
}

.hidden {
  display: none;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
  font-size: 0.95rem;
  color: var(--text-main);
  background: #fff;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.form-group input:focus-visible,
.form-group textarea:focus-visible,
.form-group select:focus-visible {
  outline: none;
  border-color: var(--focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.5;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.todo-edit-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 4px;
}

.todo-card.overdue {
  border-color: #e3b0a8;
}

.todo-card.overdue .todo-time-remaining {
  color: var(--delete-text);
}

.todo-card.in-progress .status-badge {
  background: #e8f1ff;
  color: #2754a6;
}

.todo-card.high-priority .priority-indicator {
  background: #d63c2f;
}

.todo-card.medium-priority .priority-indicator {
  background: #d08a2f;
}

.todo-card.low-priority .priority-indicator {
  background: #2f7a4b;
}

@media (min-width: 640px) {
  .page {
    padding: 42px 20px 56px;
  }

  .todo-card {
    padding: 26px;
  }

  .page-title {
    margin-bottom: 24px;
  }

  .todo-meta {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
  }

  .todo-status-control-group {
    min-width: 180px;
  }

  .form-row {
    flex-direction: row;
  }

  .form-row .form-group {
    flex: 1;
  }
}