/* ============================================================
   id-nav-chatbot — 샛강역 내비 모바일 웹 앱 스타일시트
   ============================================================ */

/* ── CSS 변수 ──────────────────────────────────────────────── */
:root {
  --color-primary:    #FF6B35;
  --color-primary-dk: #e05a25;
  --color-secondary:  #004E89;
  --color-secondary-lt: #1a6fad;
  --color-bg:         #f8f9fa;
  --color-surface:    #ffffff;
  --color-border:     #dee2e6;
  --color-text:       #212529;
  --color-text-muted: #6c757d;
  --color-success:    #28a745;
  --color-warning:    #ffc107;
  --color-info:       #17a2b8;
  --color-traveled:   #4A90D9;
  --color-route:      #FF6B35;

  --header-height:    56px;
  --tab-height:       44px;
  --bottom-bar-height: 60px;
  --border-radius:    8px;
  --shadow-sm:        0 1px 3px rgba(0,0,0,0.12);
  --shadow-md:        0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg:        0 8px 24px rgba(0,0,0,0.18);

  --transition-fast:  0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow:  0.35s ease;
}

/* ── 리셋 & 기본 ────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Noto Sans KR', 'Segoe UI', sans-serif;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

/* ── 앱 컨테이너 ─────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 430px;
  margin: 0 auto;
  background: var(--color-surface);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

/* ── 상단 헤더 ───────────────────────────────────────────────── */
#app-header {
  height: var(--header-height);
  background: var(--color-secondary);
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
  flex-shrink: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

#app-header .app-title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
  flex: 1;
}

#app-header .status-badge {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 20px;
  background: rgba(255,255,255,0.15);
  white-space: nowrap;
}

#app-header .status-badge.active {
  background: var(--color-primary);
}

#app-header .status-badge.scanning {
  background: var(--color-warning);
  color: var(--color-text);
}

/* ── 지도 영역 (입면도 + 평면도 분할, 스크롤 허용) ─────────── */
#map-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--color-bg);
  min-height: 0;
  -webkit-overflow-scrolling: touch;
}

/* 수직약도 (항상 상단 표시, 고정 높이) */
#elev-panel {
  flex: 0 0 auto;
  min-height: 210px;
  border-bottom: 3px solid var(--color-secondary);
  background: var(--color-surface);
}

#elev-panel .map-container {
  overflow: visible;
}

#elev-panel .map-container img {
  width: 100%;
  height: auto;
  display: block;
}

/* 평면도 탭 바 */
#floor-tabs {
  display: flex;
  height: 40px;
  background: var(--color-secondary);
  flex-shrink: 0;
}

.floor-tab-btn {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
  padding: 0 4px;
  letter-spacing: -0.2px;
}

.floor-tab-btn.active {
  color: #fff;
}

.floor-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 16%;
  right: 16%;
  height: 3px;
  background: var(--color-primary);
  border-radius: 3px 3px 0 0;
}

/* 평면도 패널 컨테이너 */
#floor-panel {
  flex: 0 0 auto;
  min-height: 320px;
  position: relative;
}

.map-panel {
  display: none;
  flex-direction: column;
}

.map-panel.active {
  display: flex;
}

/* 지도 이미지 + SVG 오버레이 컨테이너 */
.map-container {
  position: relative;
  width: 100%;
  flex: 1;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.map-container img,
.map-container object,
.map-container .svg-wrapper {
  display: block;
  width: 100%;
  height: auto;
  touch-action: pan-x pan-y pinch-zoom;
}

/* SVG inline 직접 embed용 */
.map-container svg {
  display: block;
  width: 100%;
  height: auto;
}

/* 경로 SVG 오버레이 — 지도 위에 절대 위치 */
.path-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

/* ── 경로 안내 정보 바 ─────────────────────────────────────── */
#nav-info-bar {
  background: linear-gradient(135deg, #003d70, var(--color-secondary));
  color: #fff;
  padding: 10px 16px;
  display: none;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  border-top: 2px solid var(--color-primary);
}

#nav-info-bar.visible {
  display: flex;
}

#nav-info-bar .nav-info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

#nav-info-bar .nav-info-label {
  font-size: 10px;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#nav-info-bar .nav-info-value {
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 140px;
}

#nav-info-bar .nav-distance {
  margin-left: auto;
  text-align: right;
}

#nav-info-bar .distance-value {
  font-size: 26px;
  font-weight: 800;
  color: #FFB347;
  line-height: 1;
}

#nav-info-bar .distance-unit {
  font-size: 12px;
  font-weight: 600;
  opacity: 0.85;
}

/* ── 하단 고정 바 ────────────────────────────────────────────── */
#bottom-bar {
  height: var(--bottom-bar-height);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
  z-index: 50;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.08);
}

/* 교통약자 토글 */
.mobility-toggle-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.mobility-toggle-label {
  font-size: 12px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* iOS 스타일 토글 스위치 */
.toggle-switch {
  position: relative;
  width: 44px;
  height: 26px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: #ccc;
  border-radius: 26px;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--color-primary);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(18px);
}

/* 도착지 선택 버튼 */
#dest-select-btn {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--border-radius);
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-fast), transform 0.1s;
  box-shadow: var(--shadow-sm);
}

#dest-select-btn:active {
  background: var(--color-primary-dk);
  transform: scale(0.97);
}

#dest-select-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
}

/* QR 스캔 버튼 */
#qr-scan-btn {
  background: var(--color-surface);
  color: var(--color-secondary);
  border: 1.5px solid var(--color-secondary);
  border-radius: var(--border-radius);
  padding: 9px 14px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 5px;
}

#qr-scan-btn:active {
  background: var(--color-secondary);
  color: #fff;
}

/* ── 도착지 선택 패널 (슬라이드업) ─────────────────────────── */
#dest-panel {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-radius: 16px 16px 0 0;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  transform: translateY(100%);
  transition: transform var(--transition-slow);
  max-height: 80%;
  display: flex;
  flex-direction: column;
}

#dest-panel.open {
  transform: translateY(0);
}

#dest-panel-header {
  padding: 12px 16px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

/* 드래그 핸들 */
#dest-panel-header::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
}

#dest-panel-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

#dest-panel-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--color-bg);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--color-text-muted);
  transition: background var(--transition-fast);
}

#dest-panel-close:active {
  background: var(--color-border);
}

/* 도착지 목록 스크롤 영역 */
#dest-list {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px 0 env(safe-area-inset-bottom, 16px);
  flex: 1;
}

/* 아코디언 섹션 */
.dest-section {
  border-bottom: 1px solid var(--color-border);
}

.dest-section:last-child {
  border-bottom: none;
}

.dest-section-header {
  display: flex;
  align-items: center;
  padding: 12px 16px 8px;
  cursor: pointer;
  user-select: none;
  gap: 8px;
}

.dest-section-header .section-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.dest-section-header .section-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex: 1;
}

.dest-section-header .section-chevron {
  font-size: 12px;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.dest-section.collapsed .section-chevron {
  transform: rotate(-90deg);
}

.dest-section-items {
  overflow: hidden;
  transition: max-height var(--transition-normal);
  max-height: 500px;
}

.dest-section.collapsed .dest-section-items {
  max-height: 0;
}

/* 도착지 항목 */
.dest-item {
  display: flex;
  align-items: center;
  padding: 13px 16px 13px 40px;
  cursor: pointer;
  transition: background var(--transition-fast);
  gap: 10px;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
}

.dest-item:active {
  background: var(--color-bg);
}

.dest-item .dest-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.dest-item .dest-info {
  flex: 1;
  min-width: 0;
}

.dest-item .dest-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.dest-item .dest-floor {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 1px;
}

.dest-item .dest-arrow {
  font-size: 14px;
  color: var(--color-primary);
  flex-shrink: 0;
}

/* ── QR 카메라 섹션 ─────────────────────────────────────────── */
#qr-section {
  position: absolute;
  inset: 0;
  background: #000;
  z-index: 300;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#qr-section.active {
  display: flex;
}

#qr-video {
  width: 100%;
  max-height: 70%;
  object-fit: cover;
}

#qr-canvas {
  display: none;
}

.qr-overlay-frame {
  position: absolute;
  width: 220px;
  height: 220px;
  border: 3px solid var(--color-primary);
  border-radius: 12px;
  box-shadow: 0 0 0 9999px rgba(0,0,0,0.5);
}

.qr-scan-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  animation: scan-line 2s ease-in-out infinite;
}

@keyframes scan-line {
  0%   { top: 0; }
  50%  { top: calc(100% - 2px); }
  100% { top: 0; }
}

.qr-hint-text {
  color: #fff;
  font-size: 13px;
  margin-top: 24px;
  opacity: 0.8;
}

#qr-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(255,255,255,0.2);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── 로딩 오버레이 ───────────────────────────────────────────── */
#loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.85);
  z-index: 400;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

#loading-overlay.visible {
  display: flex;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ── 토스트 알림 ─────────────────────────────────────────────── */
#toast-container {
  position: absolute;
  bottom: calc(var(--bottom-bar-height) + 12px);
  left: 12px;
  right: 12px;
  z-index: 500;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--color-text);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--border-radius);
  font-size: 13px;
  box-shadow: var(--shadow-md);
  animation: toast-in 0.25s ease, toast-out 0.25s ease 2.75s forwards;
  pointer-events: auto;
}

.toast.success { background: var(--color-success); }
.toast.error   { background: #dc3545; }
.toast.info    { background: var(--color-secondary); }

@keyframes toast-in {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

@keyframes toast-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

/* ── 배경 스크림 (패널 열릴 때) ─────────────────────────────── */
#scrim {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 150;
  display: none;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

#scrim.visible {
  display: block;
  opacity: 1;
}

/* ── 초기 진입 안내 화면 ──────────────────────────────────────── */
#welcome-screen {
  position: absolute;
  inset: 0;
  background: var(--color-secondary);
  z-index: 600;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px;
  text-align: center;
  gap: 20px;
}

#welcome-screen.hidden {
  display: none;
}

.welcome-logo {
  font-size: 48px;
}

.welcome-title {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
}

.welcome-subtitle {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
}

.welcome-hint {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
  padding: 12px 20px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--border-radius);
  background: rgba(255,255,255,0.05);
}

/* ── 안전 영역 대응 ─────────────────────────────────────────── */
@supports (padding: env(safe-area-inset-bottom)) {
  #bottom-bar {
    padding-bottom: calc(8px + env(safe-area-inset-bottom));
    height: calc(var(--bottom-bar-height) + env(safe-area-inset-bottom));
  }
}

/* ── 큰 화면 대응 (데스크탑 미리보기) ──────────────────────── */
@media (min-width: 431px) {
  body {
    background: #e9ecef;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: auto;
  }

  #app {
    height: 812px;
    border-radius: 20px;
    overflow: hidden;
  }
}