/* ==============================================
   Canvas Distance Tracker - Styles
   ============================================== */

/* ----- 전역 스타일 ----- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 컬러 팔레트 */
    --primary-color: #4A90E2;
    --secondary-color: #7B68EE;
    --success-color: #50C878;
    --danger-color: #E74C3C;
    --bg-color: #F5F7FA;
    --text-color: #2C3E50;
    --border-color: #D1D8E0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* 간격 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ----- 헤더 ----- */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
    box-shadow: 0 2px 10px var(--shadow-color);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

header .subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* ----- 광고 영역 ----- */
.ad-container {
    max-width: 728px;
    margin: var(--spacing-md) auto;
    text-align: center;
}

.ad-placeholder {
    background-color: #E8EAF0;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    color: #8B95A5;
    font-size: 0.9rem;
}

/* ----- 캔버스 영역 ----- */
.canvas-wrapper {
    margin: var(--spacing-lg) 0;
}

.map-frame {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-color);
    overflow: hidden;
    height: 600px; /* 고정 높이 설정 */
}

/* 카카오맵 컨테이너 */
#kakaoMap {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#drawingCanvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 10; /* 지도보다 높게 설정 */
    pointer-events: none; /* 기본적으로 지도 인터랙션 허용 */
    background: transparent; /* 투명 배경 명시 */
}

#drawingCanvas.drawing {
    cursor: grabbing;
    pointer-events: auto; /* 그리기 모드에서만 캔버스 활성화 */
}

#drawingCanvas.disabled {
    cursor: not-allowed;
    opacity: 0.6;
    pointer-events: none;
}

/* ----- 컨트롤 패널 ----- */
.control-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.controls-left {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.controls-right {
    flex: 1;
    max-width: 400px;
}

/* ----- 버튼 ----- */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 2px 5px var(--shadow-color);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px var(--shadow-color);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-primary:hover {
    background-color: #3A7BC8;
}

.btn-secondary {
    background-color: #95A5A6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7F8C8D;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #45B369;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: 1.2rem;
}

/* ----- 스케일 컨트롤 ----- */
.scale-control {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.scale-control label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.label-icon {
    font-size: 1.2rem;
}

#scaleValue {
    color: var(--primary-color);
    font-weight: 700;
}

#scaleSlider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    outline: none;
    -webkit-appearance: none;
}

#scaleSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    border: 3px solid var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 5px var(--shadow-color);
}

#scaleSlider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    border: 3px solid var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 5px var(--shadow-color);
}

/* ----- 결과 패널 ----- */
.result-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.result-item {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #F8F9FA, #E9ECEF);
    border-radius: 8px;
    text-align: center;
    border-left: 4px solid var(--primary-color);
}

.result-highlight {
    background: linear-gradient(135deg, #E3F2FD, #BBDEFB);
    border-left-color: var(--secondary-color);
    border-left-width: 6px;
}

.result-label {
    display: block;
    font-size: 0.9rem;
    color: #6C757D;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.result-value {
    display: inline-block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-right: var(--spacing-xs);
}

.result-highlight .result-value {
    color: var(--secondary-color);
    font-size: 2.5rem;
}

.result-unit {
    font-size: 1rem;
    color: #6C757D;
    font-weight: 500;
}

/* ----- 사용 방법 안내 ----- */
.instructions {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.instructions h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.8rem;
}

.instructions ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.instructions li {
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
    line-height: 1.8;
}

.instructions strong {
    color: var(--secondary-color);
}

.tip {
    background-color: #FFF3CD;
    border-left: 4px solid #FFC107;
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-top: var(--spacing-md);
}

/* ----- 푸터 ----- */
footer {
    background-color: #2C3E50;
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
}

footer p {
    margin: var(--spacing-xs) 0;
}

.footer-links a {
    color: #BDC3C7;
    text-decoration: none;
    margin: 0 var(--spacing-sm);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* ----- 반응형 디자인 ----- */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    header .subtitle {
        font-size: 1rem;
    }
    
    .control-panel {
        flex-direction: column;
        align-items: stretch;
    }
    
    .controls-left {
        justify-content: center;
    }
    
    .controls-right {
        max-width: 100%;
    }
    
    .btn {
        flex: 1;
        justify-content: center;
    }
    
    .result-panel {
        grid-template-columns: 1fr;
    }
    
    .result-value {
        font-size: 1.5rem;
    }
    
    .result-highlight .result-value {
        font-size: 2rem;
    }
    
    #drawingCanvas {
        cursor: default;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .controls-left {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

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

.canvas-wrapper,
.control-panel,
.result-panel,
.instructions {
    animation: fadeIn 0.5s ease-out;
}

/* ----- 인쇄 스타일 ----- */
@media print {
    .ad-container,
    .control-panel,
    footer {
        display: none;
    }
    
    .map-frame {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}