/* ---------- Theme tokens ---------- */
:root {
  --bg-1: #fff7f3;
  --bg-2: #ffe8ef;
  --bg-3: #e7f0ff;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: #ffffff;
  --text: #2a2350;
  --text-muted: #5b5478;
  --primary: #ff6f9c;
  --primary-strong: #d24b7c;
  --accent: #5fc4ff;
  --accent-2: #ffd166;
  --success: #3ec28c;
  --border: rgba(42, 35, 80, 0.12);
  --shadow: 0 8px 28px rgba(82, 64, 138, 0.12);
  --radius: 14px;
  --radius-lg: 22px;
  --focus: 0 0 0 3px rgba(95, 196, 255, 0.55);
  color-scheme: light;
}

:root[data-theme='dark'],
:root[data-theme='auto'] {
  /* dark fallback overridden by media query below */
}

@media (prefers-color-scheme: dark) {
  :root[data-theme='auto'] {
    --bg-1: #1f1638;
    --bg-2: #2a1c4a;
    --bg-3: #112038;
    --surface: rgba(40, 28, 70, 0.7);
    --surface-strong: #2c2150;
    --text: #f3eefb;
    --text-muted: #b9b0d8;
    --primary: #ff95b8;
    --primary-strong: #ffb6cf;
    --accent: #7cd8ff;
    --accent-2: #ffd98a;
    --success: #6cdcae;
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
    color-scheme: dark;
  }
}

:root[data-theme='dark'] {
  --bg-1: #1f1638;
  --bg-2: #2a1c4a;
  --bg-3: #112038;
  --surface: rgba(40, 28, 70, 0.7);
  --surface-strong: #2c2150;
  --text: #f3eefb;
  --text-muted: #b9b0d8;
  --primary: #ff95b8;
  --primary-strong: #ffb6cf;
  --accent: #7cd8ff;
  --accent-2: #ffd98a;
  --success: #6cdcae;
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family:
    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
    Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 600px at 90% -10%, var(--bg-2), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, var(--bg-3), transparent 60%),
    var(--bg-1);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus);
  border-radius: 8px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Layout ---------- */
.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.app-header h1 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw + 1rem, 2.4rem);
  letter-spacing: -0.01em;
  background: linear-gradient(110deg, var(--primary-strong), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  margin: 0.15rem 0 0.75rem;
  color: var(--text-muted);
}

.controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.theme-select select,
.reset-btn,
.check-all-btn,
.add-form input,
.add-form select,
.add-form button {
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
  box-shadow: var(--shadow);
}

.reset-btn {
  background: linear-gradient(120deg, var(--accent-2), var(--primary));
  color: #2a2350;
  font-weight: 600;
  border: none;
}

.reset-btn:hover {
  filter: brightness(1.05);
}

.check-all-btn {
  background: linear-gradient(120deg, var(--success), var(--accent));
  color: #2a2350;
  font-weight: 600;
  border: none;
}

.check-all-btn:hover {
  filter: brightness(1.05);
}

/* ---------- Suitcase ---------- */
.suitcase {
  position: relative;
  background: var(--surface);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow);
}

.suitcase-body {
  position: relative;
  width: 84px;
  height: 64px;
  border-radius: 10px;
  background: linear-gradient(160deg, var(--primary), var(--accent));
  box-shadow: inset 0 -6px 0 rgba(0, 0, 0, 0.12);
  flex-shrink: 0;
}

.suitcase-handle {
  position: absolute;
  top: -10px;
  left: 50%;
  width: 38px;
  height: 14px;
  transform: translateX(-50%);
  border: 4px solid var(--text);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  opacity: 0.65;
}

.suitcase-stripe {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 6px;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.5);
}

.suitcase-count {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.suitcase-count strong {
  color: var(--text);
  font-size: 1.4rem;
}

.suitcase.bump .suitcase-body {
  animation: suitcase-bump 0.45s cubic-bezier(0.2, 0.8, 0.3, 1.4);
}

@keyframes suitcase-bump {
  0% { transform: scale(1); }
  35% { transform: scale(1.12) rotate(-2deg); }
  70% { transform: scale(0.97) rotate(1deg); }
  100% { transform: scale(1); }
}

/* ---------- Add form ---------- */
.add-form {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.add-form input {
  flex: 1 1 12rem;
  text-transform: lowercase;
}

.add-form button {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  border: none;
}

.add-form button:hover {
  background: var(--primary-strong);
}

/* ---------- Lists ---------- */
.list {
  background: var(--surface);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
}

.list h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.list-must-have h2::before { content: '⭐'; }
.list-nice-to-have h2::before { content: '✨'; }

.item-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius);
  transition: background-color 150ms ease;
}

.item:hover {
  background: rgba(255, 255, 255, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root[data-theme='auto'] .item:hover {
    background: rgba(255, 255, 255, 0.06);
  }
}

:root[data-theme='dark'] .item:hover {
  background: rgba(255, 255, 255, 0.06);
}

.item input[type='checkbox'] {
  width: 1.2rem;
  height: 1.2rem;
  accent-color: var(--primary);
  flex-shrink: 0;
}

.item label {
  flex: 1;
  cursor: pointer;
  user-select: none;
}

.item.checked label {
  text-decoration: line-through;
  color: var(--text-muted);
}

.empty {
  color: var(--text-muted);
  font-style: italic;
  padding: 0.4rem 0.6rem;
}

.remove-btn {
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1;
}

.remove-btn:hover {
  background: rgba(255, 0, 80, 0.12);
  color: var(--primary-strong);
}

.error {
  padding: 1rem;
  text-align: center;
  color: var(--primary-strong);
}

/* ---------- Animation ghost ---------- */
.ghost {
  position: fixed;
  z-index: 9999;
  pointer-events: none;
  transition: transform 600ms cubic-bezier(0.4, 0, 0.2, 1), opacity 600ms ease;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.45rem 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

@media (prefers-reduced-motion: reduce) {
  .suitcase.bump .suitcase-body {
    animation: none;
  }
  .ghost {
    transition: none;
  }
}

/* ---------- Footer ---------- */
.app-footer {
  text-align: center;
  padding: 1rem 0 0.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.app-footer p {
  margin: 0;
}

.app-footer a {
  color: var(--text-muted);
  text-decoration: none;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

.app-footer a:hover {
  color: var(--primary);
  text-decoration: underline;
}