html { 
    scroll-behavior: smooth;  
}

html, body {
  font-family: serif;
}

:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --link-color: #1a0dab;
    --button-bg: #e0e0e0;
    --button-text: #333333;
    --transition-time: 0.3s;
}

.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #f0f0f0;
    --button-bg: #333333;
    --button-text: #f0f0f0;
    --link-color: #0099ff;
}

a {
    color: var(--link-color);
    transition: color var(--transition-time);
}

.top-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: stretch;
    margin-bottom: 12px;
    width: 100%;
    box-sizing: border-box;
    padding: 0 8px;
}

.top-controls > .top-link {
    flex: 1 1 calc(25% - 8px);
    min-width: 100px;
    display: flex;
    align-items: stretch;
}

.top-controls > .top-link .button-func {
    width: 100%;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
}

@media (max-width: 768px) {
    .top-controls > .top-link {
        flex: 1 1 calc(50% - 5px);
    }
}

@media (max-width: 480px) {
    .top-controls {
        gap: 6px;
        padding: 0 4px;
    }
    
    .top-controls > .top-link {
        flex: 1 1 100%;
        min-width: auto;
    }
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: 
        background-color var(--transition-time),
        color var(--transition-time);
}

@media (prefers-color-scheme: dark) {
    html:not(.dark-mode) {
        --bg-color: #ffffff;
        --text-color: #000000;
    }
}

.button-link {
    font-size: 18px;
    padding: 12px 16px;
    font-family: serif;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--border-color, #999);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    box-sizing: border-box;
    text-align: left;
    margin: 8px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 56px;
    transition: background-color var(--transition-time), color var(--transition-time), border-color var(--transition-time);
}

.button-2-link {
    font-size: 18px;
    padding: 12px 16px;
    font-family: serif;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--border-color, #999);
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    width: calc(50% - 10px);
    box-sizing: border-box;
    text-align: left;
    margin: 8px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 56px;
    transition: background-color var(--transition-time), color var(--transition-time), border-color var(--transition-time);
}

.button-3-link {
    font-size: 18px;
    padding: 12px 16px;
    font-family: serif;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--border-color, #999);
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    width: calc(33.333333333333333333333333333333333333333333333333% - 10px);
    box-sizing: border-box;
    text-align: left;
    margin: 8px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 56px;
    transition: background-color var(--transition-time), color var(--transition-time), border-color var(--transition-time);
}

.button-link img {
    width: 40px;
    height: auto;
    vertical-align: middle;
    margin-right: 10px;
}

a > .button-link,
a > .button-func {
    text-decoration: none;
}

a {
    text-decoration: none;
}


.button-func {
    font-size: 16px;
    padding: 12px 16px;
    font-family: serif;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid #999;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background-color var(--transition-time), color var(--transition-time), border-color var(--transition-time);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.button-func:hover {
    background-color: color-mix(in srgb, var(--button-bg) 85%, #000 15%);
}

table {
    font-family: serif;
    border-collapse: collapse;
    width: 100%;
}

td, th {
    border: 1px solid #696969;
    text-align: left;
    padding: 8px;
}

th {
    background-color: var(--bg-color);
    transition: background-color var(--transition-time), color var(--transition-time);
}

.sheet-btn {
    font-size: 18px;
    padding: 10px 14px;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--border-color, #999);
    border-radius: 8px;
    cursor: pointer;
    font-family: serif;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    box-sizing: border-box;
    margin: 6px 0;
    transition: background-color var(--transition-time), color var(--transition-time), border-color var(--transition-time);
}

.sheet-btn:hover {
    background-color: color-mix(in srgb, var(--button-bg) 85%, #000 15%);
}

.sheet-2-btn {
    font-size: 18px;
    padding: 10px 14px;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: 1px solid var(--border-color, #999);
    border-radius: 8px;
    cursor: pointer;
    font-family: serif;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: top;
    box-sizing: border-box;
    margin: 5px;  
    width: calc(50% - 10px);
    word-break: break-word;
    transition: background-color var(--transition-time), color var(--transition-time), border-color var(--transition-time);
}

.sheet-2-btn:hover {
    background-color: color-mix(in srgb, var(--button-bg) 85%, #000 15%);
}

.popup {
    display: none;
    position: fixed;
    z-index: 999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.popup-content {
    background-color: white;
    background: var(--bg-color, white);
    position: relative;
    margin: 10% auto;
    padding: 20px;
    width: 90%;
    max-width: 500px;
    max-height: 50vh;
    overflow-y: auto;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 20px;
    cursor: pointer;
    color: #aaa;
}

.close-btn:hover {
    color: #000;
}

.responsive-table-wrapper {
    width: 100%;
    overflow-x: auto;     
    -webkit-overflow-scrolling: touch; 
    margin-top: 20px;
}

summary {
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary h2::before {
  content: "▸ ";
}

details[open] summary h2::before {
  content: "▾ ";
}