:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;--text-color: rgba(255, 255, 255, .87);--text-secondary: rgba(255, 255, 255, .5);--bg-color: #1a1a2e;--surface-color: #16213e;--border-color: #2d2d4a;--chart-grid: rgba(255, 255, 255, .12);--tooltip-bg: #1e1e3a;--tooltip-border: #3a3a5a;--select-bg: #16213e;--select-border: #3a3a5a;color:var(--text-color);background-color:var(--bg-color);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(prefers-color-scheme:light){:root{--text-color: #213547;--text-secondary: #666;--bg-color: #f0f4f8;--surface-color: #ffffff;--border-color: #d0d7de;--chart-grid: rgba(0, 0, 0, .08);--tooltip-bg: #ffffff;--tooltip-border: #d0d7de;--select-bg: #ffffff;--select-border: #ccc;color:var(--text-color);background-color:var(--bg-color)}}body{margin:0;min-width:320px;min-height:100vh}#root{max-width:1200px;margin:0 auto;padding:1px 1px 1px 3px}.app{display:flex;flex-direction:column;min-height:100vh}.app-header{padding:1px 0;border-bottom:1px solid var(--border-color);margin-bottom:1.5rem}.app-header h1{margin:0;font-size:1.75rem;color:var(--text-color)}.app-main{flex:1}.controls{margin-bottom:1.5rem}.controls-row{display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap}.prefecture-selector{display:flex;align-items:center;gap:.75rem}.prefecture-selector label{font-weight:500;color:var(--text-secondary);font-size:.95rem}.prefecture-selector select{padding:.5rem 1rem;font-size:1rem;font-family:inherit;border-radius:6px;border:1px solid var(--select-border);background-color:var(--select-bg);color:var(--text-color);cursor:pointer;outline:none;transition:border-color .2s}.prefecture-selector select:hover,.prefecture-selector select:focus{border-color:#646cff}.date-selector{display:flex;align-items:center;gap:.75rem}.radio-label{display:flex;align-items:center;gap:.3rem;font-size:.95rem;color:var(--text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none}.radio-label input[type=radio]{cursor:pointer;accent-color:#646cff}.date-input{padding:.5rem .75rem;font-size:1rem;font-family:inherit;border-radius:6px;border:1px solid var(--select-border);background-color:var(--select-bg);color:var(--text-color);width:4.5rem;outline:none;transition:border-color .2s,opacity .2s}.date-input:not(:disabled):hover,.date-input:not(:disabled):focus{border-color:#646cff}.date-input:disabled{opacity:.35;cursor:not-allowed}.chart-container{background-color:var(--surface-color);border-radius:12px;padding:1.5rem 0;border:1px solid var(--border-color)}.chart-title{margin:0 0 .25rem 8px;font-size:1.2rem;color:var(--text-color)}.chart-subtitle{margin:0 0 1rem 8px;font-size:.875rem;color:var(--text-secondary)}.weather-chart{width:100%}.precip-chart-container{margin-bottom:1rem}.chart-graph-wrapper{position:relative}.temp-diff-panel{position:absolute;top:24px;left:50%;transform:translate(-50%);z-index:10;pointer-events:none;display:flex;align-items:center;font-size:.82rem;font-weight:400;font-family:monospace;background:transparent}.temp-diff-left{display:flex;flex-direction:column;justify-content:center;align-items:flex-end;gap:.15rem;padding-right:.8rem}.temp-diff-center{width:.1rem}.temp-diff-right{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:.15rem;padding-left:0}.temp-max{color:#ef4444}.temp-min{color:#3b82f6}@media(min-width:768px){.temp-diff-left{padding-right:1.6rem}.temp-diff-center{width:.2rem}}.status-message{text-align:center;padding:3rem 1rem;color:var(--text-secondary);font-size:1rem}.status-message.error{color:#ef4444}@media(max-width:430px){.controls-row{flex-wrap:nowrap;gap:.4rem;overflow-x:auto;font-size:.85rem}.prefecture-selector label,.radio-label{font-size:.8rem}.prefecture-selector select{padding:.35rem .5rem;font-size:.8rem}.date-input{width:3.5rem;padding:.35rem .4rem;font-size:.8rem}}