* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background-color: #f6f7fb;
    color: #333;
    font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.6;
}

.page-header {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
    padding: 16px 16px 0 16px;
    /* background-color: #4f46e5; */
    color: #4f46e5;
}

.page-header h1 {
    margin: 0;
    font-size: 24px;
}

.page-header .subtitle {
    margin: 8px 0 0;
    opacity: 0.85;
    letter-spacing: 2px;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 16px 16px;
}

.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 16px 20px;
    margin-bottom: 20px;
}

.section-title {
    display: flex;
    align-items: center;
    margin: 0 0 12px;
    font-size: 20px;
    color: #222;
}

.mark {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 10px;
    flex: none;
}

.mark-googology { background-color: #8b5cf6; }
.mark-tools     { background-color: #3b82f6; }
.mark-games     { background-color: #ef4444; }
.mark-notes     { background-color: #10b981; }

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

.link-list li {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    padding: 10px 12px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.link-list li + li {
    margin-top: 4px;
}

.link-list li:hover {
    background-color: #f1f3f9;
}

.link-list a {
    color: #4f46e5;
    text-decoration: none;
    font-weight: 500;
}

.link-list a:hover {
    text-decoration: underline;
}

.tag {
    font-size: 12px;
    color: #6b7280;
    background-color: #eef0f4;
    border-radius: 10px;
    padding: 2px 10px;
    margin-left: 10px;
}

.tag-archived {
    background-color: #e5e7eb;
    color: #9ca3af;
}

.empty {
    margin: 4px 0 8px;
    color: #9ca3af;
    font-style: italic;
}

.page-footer {
    text-align: center;
    padding: 0px 16px 16px 16px;
    color: #9ca3af;
    font-size: 14px;
}

.page-footer p {
    margin: 0;
}

.page-footer a {
    color: #4f46e5;
}

/* ===== Ordinal Dice (tools/dice.html) ===== */
.dice-result {
    font-size: 22px;
    font-weight: 600;
    text-align: center;
    color: #4f46e5;
    word-break: break-all;
}

.dice-viz {
    position: relative;
}

#axis {
    display: block;
    width: 100%;
    height: 100px;
}

#labels {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    pointer-events: none;
}

.axis-label {
    position: absolute;
    top: 8px;
    font-size: 12px;
    color: #555;
    background: rgba(255, 255, 255, 0.9);
    padding: 0 4px;
    border-radius: 3px;
    white-space: nowrap;
}

.dice-viz-hint {
    margin-top: 8px;
    font-size: 12px;
    color: #9ca3af;
}

.dice-control {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: flex-end;
}

.dice-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
    color: #555;
}

.dice-field input[type="text"] {
    width: 220px;
    padding: 6px 8px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 14px;
}

.dice-field input[type="range"] {
    width: 220px;
}

#ratioVal {
    font-weight: 600;
    color: #4f46e5;
}

#roll {
    display: block;
    width: 120px;
    height: 40px;
    margin: 18px auto 4px;
    font-size: 16px;
    border: none;
    border-radius: 8px;
    background: #4f46e5;
    color: #fff;
    cursor: pointer;
}

#roll:hover {
    background: #4338ca;
}