/* ===== CSS Variables (Light / Dark) ===== */
:root {
  --bg-color: #f5f5f5;
  --text-color: #333;
  --result-color: #222;
  --btn-bg: #4CAF50;
  --btn-hover: #45a049;
  --toggle-bg: #333;
  --toggle-color: #fff;
  --card-bg: #fff;
  --card-shadow: rgba(0, 0, 0, 0.1);
  --genre-bg: #e8f5e9;
  --genre-color: #2e7d32;
  --reason-border: #e8c547;
  --reason-label: #b8960c;
  --reason-bg: rgba(0, 0, 0, 0.03);
  /* Stage 3 추가 변수 */
  --border-color: #e0e0e0;
  --surface-color: #fff;
  --muted-color: #888;
  --accent-color: #4CAF50;
  --hover-color: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] {
  --bg-color: #1a1a2e;
  --text-color: #e0e0e0;
  --result-color: #f0f0f0;
  --btn-bg: #4CAF50;
  --btn-hover: #45a049;
  --toggle-bg: #f0f0f0;
  --toggle-color: #1a1a2e;
  --card-bg: #16213e;
  --card-shadow: rgba(0, 0, 0, 0.4);
  --genre-bg: #1b5e20;
  --genre-color: #a5d6a7;
  --reason-border: #e8c547;
  --reason-label: #e8c547;
  --reason-bg: rgba(255, 255, 255, 0.05);
  /* Stage 3 추가 변수 */
  --border-color: #2a2a4a;
  --surface-color: #16213e;
  --muted-color: #8888aa;
  --accent-color: #4CAF50;
  --hover-color: rgba(255, 255, 255, 0.06);
}

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

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  text-align: center;
  padding: 60px 20px 40px;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
  min-height: 100vh;
}

h1 {
  margin-bottom: 24px;
  font-size: 2rem;
}

/* ===== Buttons ===== */
.btn-primary {
  padding: 12px 28px;
  font-size: 18px;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  background-color: var(--btn-bg);
  color: white;
  transition: background-color 0.2s;
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 10px 16px;
  font-size: 16px;
  background-color: var(--toggle-bg);
  color: var(--toggle-color);
  border: none;
  border-radius: 20px;
  cursor: pointer;
  transition: background-color 0.3s, color 0.3s;
  z-index: 100;
}

.theme-toggle:hover {
  opacity: 0.85;
}

/* ===== Movie Card ===== */
#result {
  margin-top: 32px;
  display: flex;
  justify-content: center;
}

.movie-card {
  background-color: var(--card-bg);
  border-radius: 16px;
  box-shadow: 0 4px 20px var(--card-shadow);
  overflow: hidden;
  max-width: 340px;
  width: 100%;
  text-align: left;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.movie-card img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  display: block;
}

.movie-card .card-body {
  padding: 16px 20px 20px;
}

.movie-card .movie-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--result-color);
  margin-bottom: 4px;
}

.movie-card .movie-year {
  font-size: 0.9rem;
  color: var(--text-color);
  opacity: 0.7;
  margin-bottom: 8px;
}

.movie-card .movie-overview {
  font-size: 0.85rem;
  color: var(--text-color);
  opacity: 0.8;
  line-height: 1.5;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.movie-card .genre-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.movie-card .genre-tag {
  background-color: var(--genre-bg);
  color: var(--genre-color);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ===== Recommendation Reason ===== */
.reason-box {
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--reason-bg);
  border-left: 3px solid var(--reason-border);
  border-radius: 4px;
}

.reason-label {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--reason-label);
  margin-bottom: 8px;
  text-transform: uppercase;
  font-weight: 700;
}

.reason-text {
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--text-color);
  white-space: pre-line;
}

.reason-loading {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-color);
  opacity: 0.5;
  font-style: italic;
}

/* ===== Placeholder / Message ===== */
.placeholder-msg {
  margin-top: 40px;
  font-size: 1.1rem;
  color: var(--text-color);
  opacity: 0.7;
}

/* ===== Loading Spinner ===== */
.spinner {
  margin: 40px auto 0;
  width: 40px;
  height: 40px;
  border: 4px solid var(--text-color);
  border-top-color: var(--btn-bg);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Retry Button ===== */
.btn-retry {
  margin-top: 20px;
}

/* ===== Error ===== */
.error-msg {
  margin-top: 40px;
  color: #e53935;
  font-size: 1rem;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
  body {
    padding: 50px 12px 30px;
  }

  h1 {
    font-size: 1.5rem;
  }

  .btn-primary {
    font-size: 16px;
    padding: 10px 22px;
  }

  .movie-card {
    max-width: 100%;
  }
}

/* =============================================
   STAGE 3: 맞춤 추천 스타일
   ============================================= */

/* 탭 바 */
.tab-bar {
  display: flex;
  justify-content: center;
  gap: 0;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.tab-btn {
  padding: 14px 32px;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted-color);
  transition: all 0.2s;
}

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

.tab-btn.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

/* 섹션 전환 */
.section {
  animation: fadeIn 0.3s ease-in;
}

.section.hidden {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 입력 폼 */
.preference-form {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: left;
}

.preference-form h2 {
  font-size: 24px;
  margin-bottom: 8px;
  text-align: center;
}

.form-description {
  color: var(--muted-color);
  font-size: 14px;
  margin-bottom: 32px;
  line-height: 1.6;
  text-align: center;
}

.form-group {
  margin-bottom: 28px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
}

.required {
  color: #ef4444;
  font-weight: normal;
}

/* 영화 검색창 */
.movie-search-wrap {
  position: relative;
}

.movie-search-wrap input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-color);
  color: var(--text-color);
  font-size: 15px;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.movie-search-wrap input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.movie-search-wrap input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 검색 드롭다운 */
.search-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--surface-color);
  border: 2px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 8px 8px;
  list-style: none;
  max-height: 300px;
  overflow-y: auto;
  margin-top: -6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.search-dropdown.hidden {
  display: none;
}

.search-dropdown li {
  padding: 12px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
  transition: background 0.15s;
}

.search-dropdown li:last-child {
  border-bottom: none;
}

.search-dropdown li:hover {
  background: var(--hover-color);
}

.search-dropdown li img {
  width: 36px;
  height: 54px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}

.search-dropdown li span {
  font-size: 14px;
  flex: 1;
}

/* 선택 카운터 */
.selection-counter {
  font-size: 13px;
  color: var(--muted-color);
  margin-top: 8px;
  margin-bottom: 12px;
}

/* 선택된 영화 리스트 */
.selected-movies-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.selected-movie-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px;
  border: 2px solid var(--border-color);
  border-radius: 10px;
  background: var(--surface-color);
  transition: border-color 0.2s;
}

.selected-movie-item:hover {
  border-color: var(--accent-color);
}

.selected-movie-item img {
  width: 48px;
  height: 72px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
}

.selected-movie-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.selected-movie-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
}

.reason-input {
  font-size: 13px;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-color);
  color: var(--text-color);
  width: 100%;
  resize: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.reason-input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.reason-input::placeholder {
  color: var(--muted-color);
}

.remove-movie-btn {
  background: none;
  border: none;
  color: var(--muted-color);
  cursor: pointer;
  font-size: 20px;
  padding: 4px 8px;
  flex-shrink: 0;
  transition: color 0.2s;
}

.remove-movie-btn:hover {
  color: #ef4444;
}

/* 비선호 텍스트 영역 */
.preference-form textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-color);
  color: var(--text-color);
  font-size: 14px;
  line-height: 1.6;
  resize: vertical;
  transition: border-color 0.2s;
  box-sizing: border-box;
  font-family: inherit;
}

.preference-form textarea:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* 맞춤 추천 버튼 (기존 .btn-primary 충돌 방지) */
.btn-personalized {
  width: 100%;
  padding: 16px;
  background: var(--btn-bg);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
  margin-top: 8px;
}

.btn-personalized:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-2px);
}

.btn-personalized:active:not(:disabled) {
  transform: translateY(0);
}

.btn-personalized:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.form-hint {
  font-size: 12px;
  color: var(--muted-color);
  text-align: center;
  margin-top: 8px;
}

/* 결과 화면 */
.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 20px;
}

.results-header h2 {
  font-size: 24px;
}

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

.btn-secondary {
  padding: 10px 20px;
  background: var(--surface-color);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.btn-secondary:hover {
  border-color: var(--accent-color);
  background: var(--hover-color);
}

/* 카드 그리드 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 맞춤 추천 카드 */
.personalized-card {
  border: 2px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface-color);
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: left;
}

.personalized-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--card-shadow);
  border-color: var(--accent-color);
}

.personalized-card img {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
}

.personalized-card-body {
  padding: 16px;
}

.personalized-card-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}

.personalized-card-meta {
  font-size: 12px;
  color: var(--muted-color);
  margin-bottom: 12px;
}

.star-rating {
  color: #f5c518;
  font-size: 16px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.expected-score {
  font-size: 13px;
  color: var(--muted-color);
  font-weight: 600;
}

.similarity-badge {
  display: inline-block;
  background: var(--accent-color);
  color: #fff;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  margin: 6px 0 4px;
}

.personalized-card-reason {
  font-size: 13px;
  color: var(--text-color);
  line-height: 1.7;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  margin-top: 8px;
}

/* 로딩 텍스트 */
.loading-text {
  text-align: center;
  color: var(--muted-color);
  font-size: 15px;
  padding: 60px 20px;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* =============================================
   Stage 7: 축 시각화 차트
   ============================================= */

.axes-chart {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
}

.axes-chart-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--muted-color);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 7px;
}

.axis-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 5px;
}

.axis-name {
  font-size: 10px;
  color: var(--muted-color);
  width: 74px;
  flex-shrink: 0;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.axis-bar-track {
  flex: 1;
  height: 5px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
}

.axis-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s ease;
}

.axis-high {
  background: #ff7043;
}

.axis-low {
  background: #42a5f5;
}

.axis-val {
  font-size: 10px;
  color: var(--muted-color);
  width: 26px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* Stage 3 반응형 */
@media (max-width: 768px) {
  .tab-btn {
    padding: 12px 20px;
    font-size: 14px;
  }

  .preference-form {
    padding: 0 16px;
  }

  .results-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
  }

  .selected-movie-item img {
    width: 40px;
    height: 60px;
  }
}