:root {
  --bg-canvas: #f2f2eb;            
  --bg-card: #faffd1;              

  --todo-mint: #bbf8d8;            
  --todo-mint-dark: #235d45;
  --todo-border: #84e8b0;
  --todo-bg: #d8fbe6;

  --fix-pink: #ffb5b5;             
  --fix-pink-dark: #832727;
  --fix-border: #fca2a2;
  --fix-bg: #ffd8d8;

  --memo-purple: #b2b8ff;           
  --memo-purple-dark: #272e83;
  --memo-border: #a3aaff;
  --memo-bg: #dbe0ff;

  --text-main: #1d1d1d;
  --text-sub: #555555;
  --line-green: #48a068;          
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Segoe UI", sans-serif;
}

body {
  background-color: var(--bg-canvas);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.phone-card {
  width: 100%;
  max-width: 1000px; 
  height: auto;
  background-color: var(--bg-card);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  border-radius: 28px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 6px 8px 6px;
  font-size: 1.15rem;
  font-weight: bold;
  color: var(--text-main);
}

.site-footer {
  padding-top: 4px;
  color: var(--text-sub);
  font-size: 0.75rem;
  text-align: center;
}

.tab-menu {
  display: flex;
  gap: 8px;
  width: 100%;
  padding: 0;
}

.tab-btn {
  flex: 1;
  min-width: 0;
  padding: 10px 6px;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  text-align: center;
  opacity: 0.72;
}

.tab-btn.active {
  opacity: 1;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tab-btn:disabled {
  cursor: not-allowed;
}

.home-tab {
  background-color: #fff0c9;
  color: #74521a;
}

.todo-tab { 
  background-color: var(--todo-mint); 
  color: var(--todo-mint-dark); 
}

.fix-tab  { 
  background-color: var(--fix-pink); 
  color: var(--fix-pink-dark); 
}

.memo-tab { 
  background-color: var(--memo-purple); 
  color: var(--memo-purple-dark); 
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  border: none;
  background: transparent;
  padding: 0;
}

.page-content {
  flex: 1;
  display: none;
  flex-direction: column;
  height: min(78vh, 900px);
  min-height: 420px;
  border-radius: 20px;
  padding: 20px 16px;
  overflow-y: auto;
}

.page-content.active {
  display: flex;
}

#home-page {
  gap: 16px;
  justify-content: center;
  align-items: center;
  text-align: center;
  background-color: #fff7df;
  border: 2.5px solid #f3d58d;
}

.home-logo {
  display: block;
  width: min(100%, 320px);
  max-height: 34vh;
  object-fit: contain;
}

.home-welcome {
  width: min(100%, 420px);
}

.home-welcome h1 {
  margin-bottom: 12px;
  color: var(--text-main);
  font-size: 1.5rem;
}

.home-welcome p {
  color: var(--text-sub);
}

#todo-page { 
  background-color: var(--todo-bg); 
  border: 2.5px solid var(--todo-border); 
}

#fix-page  { 
  background-color: var(--fix-bg); 
  border: 2.5px solid var(--fix-border); 
}

#memo-page { 
  background-color: var(--memo-bg); 
  border: 2.5px solid var(--memo-border); 
}

.memo-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}

.clear-memo-btn {
  padding: 7px 12px;
  border: 1px solid rgba(39, 46, 131, 0.35);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.45);
  color: var(--memo-purple-dark);
  font-size: 0.9rem;
  cursor: pointer;
}

.clear-memo-btn:hover {
  background: rgba(255, 255, 255, 0.75);
}

.memo-textarea {
  flex: 1;
  width: 100%;
  min-height: 0;
  padding: 4px 8px;
  border: 0;
  outline: 0;
  resize: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 31px,
    rgba(39, 46, 131, 0.18) 31px,
    rgba(39, 46, 131, 0.18) 32px
  );
  color: var(--memo-purple-dark);
  font-size: 1rem;
  line-height: 32px;
}

.memo-textarea::placeholder {
  color: rgba(39, 46, 131, 0.55);
}

.item-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.item-row {
  display: flex;
  align-items: center; 
  gap: 12px;
  width: 100%;
}

.box-check {
  width: 20px;
  height: 20px;
  border: 2.5px solid var(--line-green);
  border-radius: 2px;
  cursor: pointer;
  background: transparent;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.box-check.checked::after {
  content: '✓';
  color: var(--line-green);
  font-weight: bold;
  font-size: 16px;
}

.line-input {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--line-green);
  padding: 4px 2px;
  font-size: 1rem;
  outline: none;
  color: var(--todo-mint-dark);
}

.item-row.fix-mode .line-input {
  border-bottom: 2px solid var(--fix-pink-dark);
  color: var(--fix-pink-dark);
}

.item-row.completed .line-input {
  text-decoration: line-through;
  opacity: 0.5;
}

.fix-box-check {
  width: 20px;
  height: 20px;
  border: 2.5px solid var(--fix-pink-dark);
  border-radius: 2px;
  cursor: pointer;
  background: transparent;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.fix-box-check.checked::after {
  content: '✓';
  color: var(--fix-pink-dark);
  font-weight: bold;
  font-size: 16px;
}

.memo-box-check {
  width: 20px;
  height: 20px;
  border: 2.5px solid var(--memo-purple-dark);
  border-radius: 2px;
  cursor: pointer;
  background: transparent;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.memo-box-check.checked::after {
  content: '✓';
  color: var(--memo-purple-dark);
  font-weight: bold;
  font-size: 16px;
}

.item-row.memo-mode .line-input {
  border-bottom-color: var(--memo-purple-dark);
  color: var(--memo-purple-dark);
}

@media (max-width: 480px) {
  body {
    padding: 12px;
  }

  .phone-card {
    padding: 16px 12px;
    border-radius: 20px;
  }

  .header {
    font-size: 0.95rem;
  }

  .tab-menu {
    gap: 5px;
  }

  .tab-btn {
    padding: 9px 3px;
    font-size: 0.85rem;
  }
}