/* style.css - Boundary X: Object Detection (Fully Responsive & Sticky) */

:root {
  /* Palette */
  --primary: #000000;       
  --primary-hover: #333333; 
  --accent-grey: #F8F9FA;   
  --border-color: #D1D5DB;  
  
  --bg-color: #FFFFFF;      
  --text-main: #111111;     
  --text-sub: #666666;      
  
  --danger: #EA4335;        
  --success: #137333;       
  
  /* Shapes */
  --radius-pill: 50px;      
  --radius-card: 16px;      
  
  --font-family: 'Pretendard', -apple-system, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-family);
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  background: #000000;
  border-bottom: 1px solid #333;
  padding: 1rem 5vw;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: padding 0.3s ease;
}

.title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: font-size 0.3s ease;
}

.title img {
  height: 28px;
  width: auto;
  transition: height 0.3s ease;
}

.back-button {
  text-decoration: none;
  color: #FFFFFF;
  border: 1px solid #FFFFFF;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-pill);
  transition: all 0.2s;
}

.back-button:hover {
  background: #FFFFFF;
  color: #000000;
}

/* Main Layout */
main {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

/* Canvas Container */
.canvas-container { 
    width: 100%;
    max-width: 400px;
    aspect-ratio: 4/3; 
    border-radius: var(--radius-card);
    overflow: hidden;
    background: #000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    position: relative;
    flex-shrink: 0;
}

canvas { 
    display: block; 
    width: 100% !important; 
    height: 100% !important; 
    object-fit: contain; 
}

/* Controls */
.controls {
  width: 100%;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.control-group {
  background: var(--accent-grey);
  padding: 2.5rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-color);
}

.control-group h3 {
  background: transparent;
  color: #000000;
  border-left: 6px solid #000000;
  padding-left: 1rem;
  font-size: 1.3rem;
  font-weight: 800; 
  margin-bottom: 1rem;
  line-height: 1.1;
  display: flex;
  align-items: center;
}

.control-group p {
  color: var(--text-sub);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

/* Buttons */
.button-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  cursor: pointer;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.9rem 1.5rem;
  border-radius: var(--radius-pill);
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-width: 140px;
}

.start-button {
  background-color: var(--primary);
  color: white;
}
.start-button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

.stop-button {
  background-color: white;
  color: var(--danger);
  border: 1px solid var(--border-color);
}
.stop-button:hover {
  background-color: #FFF5F5;
  border-color: var(--danger);
}

input, select {
  width: 100%;
  padding: 0.9rem 1.2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  font-size: 1rem;
  background: #FFFFFF;
  color: var(--text-main);
  outline: none;
  margin-bottom: 10px;
}

input:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(0,0,0,0.1);
}

/* Selected Object Tags */
.selected-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  min-height: 40px; 
}

.tag-item {
  display: inline-flex;
  align-items: center;
  background-color: #000;
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  animation: fadeIn 0.3s ease;
}

.tag-remove {
  margin-left: 8px;
  cursor: pointer;
  color: #FE818D;
  font-weight: bold;
  font-size: 1.1rem;
  line-height: 1;
}
.tag-remove:hover {
  color: #ffb3b9;
}

/* Data Info Box Style */
.data-info-box {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.2rem;
  margin-bottom: 1rem;
}

.info-title {
  font-size: 1rem !important;
  color: #333 !important;
  margin-bottom: 0.5rem !important;
}

.info-desc {
  font-size: 0.9rem !important;
  color: #666 !important;
  margin-bottom: 1rem !important;
  text-align: left !important;
}

.info-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.info-tags span {
  background: #F1F3F4;
  color: #333;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-family: 'Pretendard', sans-serif;
  font-weight: 500;
}

/* Status & Data Display */
#bluetoothStatus {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-card);
  font-size: 1rem;
  text-align: center;
  font-weight: 700;
  background-color: #F1F3F4;
  color: #333;
  border: 1px solid var(--border-color);
}

.status-connected {
  background-color: #E6F4EA !important;
  color: var(--success) !important;
  border-color: var(--success) !important;
}

.status-error {
  background-color: #FCE8E6 !important;
  color: var(--danger) !important;
  border-color: var(--danger) !important;
}

.data-display {
  font-family: 'Pretendard', sans-serif !important; 
  background: #000;
  color: #0f0;
  padding: 1.2rem;
  border-radius: 12px;
  font-size: 1rem;
  text-align: center;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* Custom Black Range Slider */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 10px;
  border-radius: 5px;
  background: #D1D5DB;
  outline: none;
  margin: 10px 0;
  padding: 0;
  border: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #000000;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  transition: transform 0.2s;
  margin-top: -1px;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

/* Footer Style */
footer {
  background-color: #000000;
  color: #FFFFFF;
  padding: 4rem 5vw 4rem;
  border-top: 1px solid #222;
  margin-top: auto;
  font-size: 0.9rem;
}

.footer-container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 4rem;
}

.footer-info {
  flex: 1;
  min-width: 280px;
  display: flex;
  flex-direction: column;
}

.footer-logo {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: #FFFFFF;
}

.slogan {
  font-size: 0.95rem;
  color: #CCCCCC;
  font-weight: 400;
  margin-bottom: 1.5rem;
  line-height: 1.5;
  word-break: keep-all;
}

address {
  font-style: normal;
  color: #888;
  line-height: 1.6;
}

.copyright {
  margin-top: 0.8rem;
  font-size: 0.8rem;
  color: #666;
}

.footer-links {
  display: flex;
  gap: 4rem;
  flex-wrap: wrap;
}

.link-column h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 1.2rem;
}

.link-column ul {
  list-style: none;
  padding: 0;
}

.link-column li {
  margin-bottom: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.link-column a {
  text-decoration: none;
  color: #CCCCCC;
  font-weight: 500;
  transition: color 0.2s;
}

.link-column a:hover {
  color: #FFFFFF;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.link-desc {
  font-size: 0.8rem;
  color: #666;
}

/* --- RESPONSIVE LAYOUT (3 Types) --- */

/* 1. PC & Tablet Layout (PC) */
@media (min-width: 768px) {
  main {
    flex-direction: row;       
    align-items: flex-start;   
    justify-content: center;   
    gap: 4rem;                 
  }

  .canvas-container {
    position: sticky; 
    top: 2rem;        
    width: 400px;
  }

  .controls {
    flex: 1;          
  }
}

/* 2. Mobile Portrait (세로 모드) */
@media (max-width: 767px) and (orientation: portrait) {
  header { padding: 0.8rem 1rem; }
  .title { font-size: 1rem; }
  .title img { height: 20px; }
  .back-button { font-size: 0.8rem; padding: 0.4rem 0.8rem; }
  
  .footer-top { flex-direction: column; gap: 3rem; }
  .footer-links { gap: 2.5rem; flex-direction: column; }
  
  main { padding: 1rem; gap: 1.5rem; }
  
  /* [Sticky] 세로 모드 플로팅 */
  .canvas-container {
    position: sticky;       
    top: 70px;             
    z-index: 90;           
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5); 
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 100%;
    margin-bottom: 1rem;
  }

  .control-group { padding: 1.5rem; }
  .button-group { flex-direction: column; }
  button { width: 100%; }
}

/* 3. Mobile Landscape (가로 모드) */
@media (max-width: 900px) and (orientation: landscape) {
  header { padding: 0.5rem 1rem; }
  
  main {
    flex-direction: row;      /* 좌우 배치 */
    align-items: flex-start;  /* 상단 정렬 (Sticky 필수 조건) */
    padding: 1rem;
    gap: 1.5rem;
  }

  /* [Sticky] 가로 모드 플로팅 */
  .canvas-container {
    position: sticky;        
    top: 80px;               /* 헤더 높이만큼 띄움 */
    z-index: 90;
    
    width: 45%;              /* 화면 절반 차지 */
    min-width: 300px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2); 
    margin-bottom: 0;
  }
  
  .controls {
    flex: 1;                 
    width: 50%;
  }

  .control-group { padding: 1rem; }
  .button-group { flex-direction: row; } 
  footer { display: none; } 
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}