/* 기본 디자인 시스템 및 CSS 변수 선언 */
:root {
    --primary-color: #e50914;
    --primary-hover: #b80710;
    --background-color: #f0f2f5;
    --surface-color: #ffffff;
    --card-border: #e1e4e8;
    --text-color: #212529;
    --text-secondary: #4a5568;
    --input-bg: #ffffff;
    --input-border: #ccd1d9;
    
    /* 기상 위험군 테마 색상 */
    --color-very-cold: #007bff;
    --color-cold: #17a2b8;
    --color-comfortable: #28a745;
    --color-warm: #fd7e14;
    --color-hot: #dc3545;
    --color-extreme: #721c24;
}

/* 다크 모드 변수 재정의 */
[data-theme="dark"] {
    --background-color: #0f0f11;
    --surface-color: #1e1e24;
    --card-border: #2d2d35;
    --text-color: #f8f9fa;
    --text-secondary: #a0a5b1;
    --input-bg: #25252b;
    --input-border: #3d3d4a;
}

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

/* 페이지 전체 중앙 정렬 메커니즘 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Malgun Gothic", "맑은 고딕", helvetica, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px 10px;
    word-break: keep-all;
    transition: background-color 0.3s, color 0.3s;
}

.app-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
}

/* 헤더 스타일 */
header {
    background-color: var(--surface-color);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 20px;
    border: 1px solid var(--card-border);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

h1 {
    font-size: 1.6rem;
    color: var(--text-color);
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 메인 레이아웃 반응형 그리드 */
.main-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    align-items: start;
    margin-bottom: 20px;
}

@media (min-width: 850px) {
    .main-layout {
        grid-template-columns: 380px 1fr;
    }
}

/* 카드 컴포넌트 */
.card {
    background-color: var(--surface-color);
    border-radius: 12px;
    border: 1px solid var(--card-border);
    padding: 22px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
}

h2 {
    font-size: 1.25rem;
    margin-bottom: 18px;
    border-bottom: 2px solid var(--card-border);
    padding-bottom: 8px;
}

h3 {
    font-size: 1.05rem;
    margin-bottom: 15px;
}

/* 입력 폼 필드 스타일 */
.form-group {
    margin-bottom: 18px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.input-with-unit {
    display: flex;
    gap: 8px;
}

input[type="number"], select {
    width: 100%;
    padding: 10px 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-color);
    border-radius: 6px;
    font-size: 0.95rem;
}

.input-with-unit select {
    width: 95px;
}

.label-space {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.range-val {
    font-weight: bold;
    color: var(--primary-color);
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-group input[type="range"] {
    flex: 1;
    height: 6px;
    cursor: pointer;
}

.slider-group input[type="number"] {
    width: 75px;
}

/* 버튼 컴포넌트 시스템 */
.btn {
    padding: 11px 16px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    border: none;
    transition: background 0.15s, transform 0.1s;
    text-align: center;
}

.btn:active {
    transform: scale(0.98);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

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

.btn-secondary {
    background-color: #4a5568;
    color: #fff;
}
.btn-secondary:hover { background-color: #3a4352; }

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--input-border);
    color: var(--text-color);
}
.btn-outline:hover { background-color: var(--card-border); }

.form-actions {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 10px;
    margin-top: 22px;
}

.api-actions {
    margin-bottom: 15px;
}
.api-actions .btn { width: 100%; }

.api-status {
    padding: 8px 12px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 0.85rem;
    background-color: var(--background-color);
}

.error-msg {
    color: #dc3545;
    font-size: 0.8rem;
    margin-top: 4px;
    display: block;
}

/* 우측 결과창 영역 대시보드 */
.dashboard-layout {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.grid-2col {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 650px) {
    .grid-2col { grid-template-columns: 1fr 1fr; }
}

/* 결과 메인 전광판 스타일 */
.result-card {
    background: linear-gradient(135deg, #1e2022, #101113);
    color: #ffffff;
    border: none;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.badge {
    background-color: rgba(255,255,255,0.15);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.main-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 25px;
    margin: 20px 0;
}

.weather-icon { font-size: 3.8rem; }
.temp-box { display: flex; flex-direction: column; }
.temp-label { font-size: 0.9rem; color: #a0a5b1; }
.temp-value { font-size: 3.2rem; font-weight: 800; line-height: 1.1; }

.comfort-banner {
    padding: 10px;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    font-size: 1rem;
    background-color: rgba(255,255,255,0.08);
}

/* 세부 데이터 요약 표 */
.spec-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
}

.spec-table th, .spec-table td {
    padding: 9px 6px;
    border-bottom: 1px solid var(--card-border);
    text-align: left;
    font-size: 0.9rem;
}

.spec-table td:last-child { text-align: right; font-weight: 600; }
.bold { font-weight: bold; font-size: 1.05rem; }

.share-box { display: flex; gap: 8px; }
.share-box .btn { flex: 1; }

/* 원형 그래픽 미터 구성 */
.visualizers {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 15px;
    height: 120px;
}

.gauge-wrapper {
    flex: 2;
    position: relative;
}

.gauge-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding: 0 4px;
    margin-top: -5px;
}

#gauge-needle {
    transition: transform 0.6s cubic-bezier(0.1, 0.8, 0.3, 1);
}

.thermometer-container {
    flex: 0.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.thermometer-bar {
    width: 14px;
    height: 85px;
    background-color: var(--background-color);
    border-radius: 10px;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.thermometer-fill {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 50%;
    background-color: var(--primary-color);
    border-radius: 10px;
    transition: height 0.6s cubic-bezier(0.1, 0.8, 0.3, 1);
}

.thermometer-lbl { font-size: 0.7rem; color: var(--text-secondary); margin-top: 4px; }

/* 시뮬레이션 그래프 영역 */
.chart-container {
    width: 100%;
    overflow: hidden;
    background-color: var(--background-color);
    border-radius: 8px;
    padding: 12px 6px;
    display: flex;
    justify-content: center;
}

canvas {
    max-width: 100%;
    height: auto;
}

.chart-desc { font-size: 0.82rem; color: var(--text-secondary); margin-top: 8px; }

/* 내역 저장 테이블 구조 */
.table-responsive { width: 100%; overflow-x: auto; }
.history-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; margin-top: 10px; min-width: 500px; }
.history-table th, .history-table td { padding: 10px; border-bottom: 1px solid var(--card-border); text-align: left; }
.history-table th { background-color: var(--background-color); font-weight: 600; }
.center { text-align: center !important; color: var(--text-secondary); padding: 25px 0; }
.history-actions { margin-top: 12px; display: flex; justify-content: flex-end; }

/* 테마 변경 전용 버튼 */
.btn-theme {
    background: transparent;
    border: 1px solid var(--input-border);
    color: var(--text-color);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    font-weight: 600;
}

footer { text-align: center; margin-top: 30px; padding: 10px 0; color: var(--text-secondary); font-size: 0.8rem; }