/* ================= 时光留言板样式 =================
 * 颜色全部使用 CSS 变量；变量的具体值由 JSP 根据 web.xml 配置输出。
 * 这里的默认值只在诊断页、错误页等没有主题的页面上生效。
 */
:root {
    --theme-bg: #f4f6f8;
    --theme-text: #1f2a33;
    --theme-accent: #2f7d5b;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--theme-bg);
    /* 时段背景：在主题底色上叠加一层主题强调色的光晕 */
    background-image: radial-gradient(circle at 85% 0%, color-mix(in srgb, var(--theme-accent) 35%, transparent), transparent 45%);
    background-attachment: fixed;
    color: var(--theme-text);
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.7;
}
a { color: var(--theme-accent); }

/* 页头：时段 · 主题 · 站点名 */
.board-header { border-bottom: 3px solid var(--theme-accent); position: relative; overflow: hidden; background: #111; color: #f5f5f5; }
.board-header-inner { max-width: 1100px; margin: 0 auto; padding: 28px 20px 24px; position: relative; z-index: 1; }
.board-header h1 { margin: 6px 0 14px; font-size: 32px; letter-spacing: 1px; }
.board-period { display: flex; flex-wrap: wrap; gap: 8px 16px; margin: 0; font-size: 14px; opacity: 0.9; }
.period-badge { padding: 0 10px; border-radius: 999px; background: var(--theme-accent); color: var(--theme-bg); font-weight: bold; }
.board-nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.board-nav a { text-decoration: none; padding-bottom: 2px; color: #ddd; }
.board-nav a:hover, .board-nav a.active { color: var(--theme-accent); border-bottom: 2px solid var(--theme-accent); }

/* 页头右侧的太阳/月亮装饰：形状随时段变化，颜色仍来自主题变量 */
.board-header::after {
    content: "";
    position: absolute;
    right: 8%;
    top: 22px;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--theme-accent);
    opacity: 0.85;
}
.period-dawn .board-header::after { top: 70px; opacity: 0.6; }
.period-dusk .board-header::after { top: 60px; opacity: 0.7; }
.period-night .board-header::after { background: transparent; box-shadow: 16px -8px 0 0 var(--theme-accent); }

.board-main { max-width: 1100px; margin: 0 auto; padding: 24px 20px 40px; }
.board-columns { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 20px; align-items: start; }
@media (max-width: 860px) { .board-columns { grid-template-columns: minmax(0, 1fr); } }

.card {
    margin-bottom: 20px;
    padding: 20px 22px;
    border: 1px solid color-mix(in srgb, var(--theme-text) 18%, transparent);
    background: color-mix(in srgb, var(--theme-bg) 96%, var(--theme-text));
    border-radius: 2px;
}
.card h2 { margin: 0 0 12px; font-size: 19px; }
.card h3 { margin: 18px 0 8px; font-size: 15px; }

.notice { padding: 10px 14px; margin: 0 0 14px; border-radius: 4px; border-left: 4px solid; overflow-wrap: anywhere; }
.notice-success { border-color: var(--theme-accent); background: color-mix(in srgb, var(--theme-accent) 14%, transparent); }
.notice-error { border-color: #c0392b; background: color-mix(in srgb, #c0392b 14%, transparent); }
.notice-info { border-color: var(--theme-text); background: color-mix(in srgb, var(--theme-text) 8%, transparent); }

.counter-list { display: flex; flex-wrap: wrap; gap: 8px 28px; list-style: none; margin: 8px 0 0; padding: 0; font-size: 13px; }
.memory-card { border-left: 3px solid var(--theme-accent); }
.memory-card p { margin: 0 0 8px; }
.site-brand { letter-spacing: 2px; font-weight: bold; color: var(--theme-accent); }

/* 表单 */
.message-form label, .filter-form label { display: block; font-weight: bold; margin: 12px 0 4px; }
.filter-form label { display: inline; margin: 0 4px 0 0; }
.message-form input, .message-form select, .message-form textarea, .filter-form select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid color-mix(in srgb, var(--theme-text) 35%, transparent);
    border-radius: 4px;
    background: var(--theme-bg);
    color: var(--theme-text);
    font: inherit;
}
.filter-form { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 12px; }
.filter-form select { width: auto; }
.message-form textarea { resize: vertical; }
.field-error { margin: 4px 0 0; color: #c0392b; font-size: 13px; }
.form-hint { margin: 10px 0 0; font-size: 13px; opacity: 0.75; }
.char-counter { float: right; font-size: 12px; opacity: 0.7; }
.board-button {
    margin-top: 14px;
    padding: 8px 22px;
    border: 2px solid var(--theme-accent);
    border-radius: 4px;
    background: var(--theme-accent);
    color: var(--theme-bg);
    font: inherit;
    font-weight: bold;
    cursor: pointer;
}
.board-button:hover { background: transparent; color: var(--theme-accent); }
.board-button.small { margin-top: 0; padding: 4px 14px; }

/* 留言列表 */
.list-summary { margin: 0 0 8px; font-size: 13px; opacity: 0.8; }
.message-list { list-style: none; margin: 0; padding: 0; }
.message-item { padding: 12px 0; border-top: 1px dashed color-mix(in srgb, var(--theme-text) 25%, transparent); }
.message-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; font-size: 13px; }
.message-nickname { font-size: 15px; overflow-wrap: anywhere; }
.tag { padding: 0 8px; border: 1px solid var(--theme-accent); border-radius: 999px; color: var(--theme-accent); }
.message-meta time { opacity: 0.7; }
/* pre-wrap 保留换行；转义后的 <script> 会原样显示为文字 */
.message-content { margin: 6px 0 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.empty-list { opacity: 0.7; }

/* 看板 */
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; text-align: center; }
.stat-grid > div { padding: 10px; border-radius: 4px; background: color-mix(in srgb, var(--theme-accent) 12%, transparent); }
.stat-number { display: block; font-size: 30px; font-weight: bold; color: var(--theme-accent); }
.dashboard-note { font-size: 12px; opacity: 0.75; margin: 10px 0 0; }
.heat-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.heat-table th { text-align: left; font-weight: normal; padding: 4px 6px 4px 0; white-space: nowrap; }
.heat-table tr.current th { font-weight: bold; color: var(--theme-accent); }
.bar-cell { width: 100%; padding-left: 12px; }
.bar { display: block; height: 10px; min-width: 0; border-radius: 5px; background: var(--theme-accent); }
.bar-count { padding-left: 6px; white-space: nowrap; text-align: right; }

/* 诊断区 */
.diagnostics dl { margin: 0; font-size: 13px; }
.diagnostics dt { font-weight: bold; margin-top: 8px; }
.diagnostics dd { margin: 0; overflow-wrap: anywhere; font-family: Consolas, monospace; }

.board-footer { text-align: center; font-size: 12px; opacity: 0.7; padding: 0 20px 30px; }

/* 诊断页、错误页通用 */
.plain-page { max-width: 1000px; margin: 0 auto; padding: 30px 20px 50px; }
.plain-page h1 { font-size: 26px; margin: 0 0 6px; }
.data-table { width: 100%; border-collapse: collapse; margin: 10px 0 18px; font-size: 14px; }
.data-table th, .data-table td { padding: 8px 10px; border: 1px solid color-mix(in srgb, var(--theme-text) 22%, transparent); text-align: left; vertical-align: top; overflow-wrap: anywhere; }
.data-table th { background: color-mix(in srgb, var(--theme-accent) 12%, transparent); }
.data-table code, .stack-trace { font-family: Consolas, monospace; font-size: 13px; }
.stack-trace { white-space: pre-wrap; overflow-wrap: anywhere; padding: 12px; border-radius: 4px; background: color-mix(in srgb, var(--theme-text) 8%, transparent); }
.explain { padding: 12px 16px; border-left: 4px solid var(--theme-accent); background: color-mix(in srgb, var(--theme-accent) 8%, transparent); }

/* 小屏幕上导航和筛选自然换行，表单不撑宽页面。 */
@media (max-width: 520px) {
    .board-header h1 { font-size: 25px; }
    .board-header::after { opacity: 0.25; right: 20px; }
    .board-main { padding: 18px 14px 28px; }
    .card { padding: 18px 16px; }
    .board-period { font-size: 12px; }
    .board-nav { gap: 8px 16px; font-size: 13px; }
    .filter-form select { min-width: 0; max-width: 100%; }
}