/* 调色板与变量 */
:root{--c-primary:#4f8ef7;--c-primary-600:#337cf5;--c-primary-50:#eef5ff;--c-text:#222;--c-muted:#6b7280;--c-border:#e6e9f2;--c-shadow:rgba(22,31,56,.08);--c-danger:#e5484d;--c-danger-600:#d13a3f;}

/***** 基础 *****/
*{box-sizing:border-box}
html,body{height:100%}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;margin:0;background:#f6f7fb;color:var(--c-text);} 

/***** 布局 *****/
.container{max-width:980px;margin:0 auto;padding:20px;}
.header{display:flex;gap:12px;align-items:center;justify-content:space-between;margin-bottom:16px;}

/***** 头部按钮与通用按钮 *****/
.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border:1px solid #d0d4e0;border-radius:10px;background:#fff;color:#4a4a4a;text-decoration:none;transition:all .2s ease;line-height:1;font-size:14px;}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 14px var(--c-shadow);} 
button{cursor:pointer}
button.primary,.btn.primary{background:var(--c-primary);border-color:var(--c-primary);color:#fff;border-radius:10px;}
button.primary:hover,.btn.primary:hover{background:var(--c-primary-600);border-color:var(--c-primary-600);} 
/* 统一主按钮尺寸与对齐，确保与 .btn.primary 一致 */
button.primary{display:inline-flex;align-items:center;padding:9px 14px;line-height:1;font-size:14px;border:1px solid var(--c-primary);}
.btn.ghost{background:transparent;border-color:#d0d4e0;color:#333}
.btn.ghost:hover{background:#fff}
.btn.danger{background:var(--c-danger);border-color:var(--c-danger);color:#fff}
.btn.danger:hover{background:var(--c-danger-600);border-color:var(--c-danger-600)}

/***** 搜索区 *****/
.search{display:flex;gap:10px;margin:6px 0 14px 0}
input[type=text], input[type=datetime-local], input[type=password]{padding:11px 12px;border:1px solid #ccd3e0;border-radius:10px;min-width:260px;background:#fff;outline:none;transition:border-color .2s ease, box-shadow .2s ease, transform .05s ease;}
input[type=text]:focus, input[type=datetime-local]:focus, input[type=password]:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(79,142,247,.15)}
input[type=text]:hover, input[type=datetime-local]:hover, input[type=password]:hover{transform:translateY(-1px)}

/***** 列表卡片 *****/
.list{display:flex;flex-direction:column;gap:12px;}
.item{padding:16px;border:1px solid var(--c-border);border-radius:14px;background:#fff;box-shadow:0 8px 18px var(--c-shadow);} 
.item:hover{box-shadow:0 12px 26px var(--c-shadow)}
.item .actions{display:flex;align-items:center;gap:8px}
.item .actions a{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border-radius:8px;background:var(--c-primary-50);color:var(--c-primary);text-decoration:none;border:1px solid #dfe6ff;font-size:15px;line-height:1}
.item .actions a:hover{filter:brightness(1.02)}
/* 删除按钮样式，强制设置尺寸为53.6×33.6 */
.btn-link{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border-radius:8px;background:var(--c-primary-50);color:var(--c-primary);text-decoration:none;border:1px solid #dfe6ff;cursor:pointer;margin:0;vertical-align:top;box-sizing:border-box;font-size:15px;line-height:1}
.btn-link:hover{filter:brightness(1.02)}
/* 确保form元素不影响按钮尺寸 */
.item .actions form{display:inline-flex!important;margin:0!important;padding:0!important;border:none!important;background:none!important}
.badge{display:inline-block;background:#eef2ff;border:1px solid #dfe6ff;border-radius:999px;padding:3px 10px;margin-right:6px;font-size:12px;color:#3558f2}
.content-preview{color:#555;font-size:13px;margin:6px 0;line-height:1.4;max-width:100%;overflow:hidden}
.media-icon{display:inline-block;margin-right:6px;font-size:14px;vertical-align:middle}
.media-preview{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}
.media-item{flex-shrink:0}
.preview-thumb{width:240px;height:160px;object-fit:cover;border-radius:6px;border:1px solid #eee}
.preview-audio{width:200px;height:32px}
.preview-video{width:240px;height:160px;object-fit:cover;border-radius:6px;border:1px solid #eee}

/***** 图片查看器 *****/
.image-viewer-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.8);z-index:9999;display:flex;align-items:center;justify-content:center;padding:20px}
.image-viewer-content{background:#fff;border-radius:12px;max-width:90vw;max-height:90vh;overflow:hidden;box-shadow:0 20px 40px rgba(0,0,0,.3)}
.image-viewer-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid #eee;background:#f8f9fa}
.image-viewer-counter{font-weight:500;color:#333;font-size:14px}
.image-viewer-close{background:none;border:none;font-size:24px;cursor:pointer;color:#666;padding:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center}
.image-viewer-close:hover{color:#333}
.image-viewer-body{position:relative;display:flex;align-items:center;justify-content:center;background:#000}
.image-viewer-img{max-width:100%;max-height:calc(90vh - 60px);object-fit:contain;display:block}
/* 将左右按钮放到图片外侧（遮罩两侧中线位置） */
.image-viewer-nav{position:fixed;top:50%;transform:translateY(-50%);background:rgba(0,0,0,.55);border:none;color:#fff;font-size:28px;font-weight:700;cursor:pointer;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(0,0,0,.35);transition:all .2s ease;z-index:10000}
.image-viewer-nav:hover{background:rgba(0,0,0,.7);transform:translateY(-50%) scale(1.06)}
.image-viewer-nav:active{transform:translateY(-50%) scale(0.98)}
.image-viewer-nav:disabled{opacity:.35;cursor:not-allowed;transform:translateY(-50%)}
.image-viewer-nav:disabled:hover{background:rgba(0,0,0,.55);transform:translateY(-50%)}
.image-viewer-prev{left:24px}
.image-viewer-next{right:24px}
.image-viewer-prev::before{content:'<'}
.image-viewer-next::before{content:'>'}

/***** 视频播放器 *****/
.video-viewer-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.8);z-index:9999;display:flex;align-items:center;justify-content:center;padding:20px}
.video-viewer-content{background:#000;border-radius:12px;max-width:90vw;max-height:90vh;overflow:hidden;box-shadow:0 20px 40px rgba(0,0,0,.5)}
.video-viewer-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:rgba(0,0,0,.8);color:#fff}
.video-viewer-title{font-weight:500;color:#fff}
.video-viewer-close{background:none;border:none;font-size:24px;cursor:pointer;color:#ccc;padding:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center}
.video-viewer-close:hover{color:#fff}
.video-viewer-video{max-width:100%;max-height:calc(90vh - 60px);display:block}
.note{color:var(--c-muted);font-size:12px;margin-top:4px}

/***** 富文本编辑 *****/
#content{min-height:260px;border:1px solid #dfe3ee;border-radius:12px;padding:12px;background:#fff;}
#content:focus{outline:none;box-shadow:0 0 0 3px rgba(79,142,247,.12)}
#content img{max-width:100%;border-radius:8px}
/* 编辑器内媒体操作条（基础改进） */
.editor-media{position:relative;display:inline-block}
.editor-media .editor-media-toolbar{position:absolute;top:6px;right:6px;display:flex;gap:6px;background:rgba(0,0,0,.6);padding:4px 6px;border-radius:999px;opacity:0;pointer-events:none;transition:opacity .15s ease;z-index:10}
.editor-media:hover .editor-media-toolbar,.editor-media.show-toolbar .editor-media-toolbar{opacity:1;pointer-events:auto}
.editor-media .editor-media-action{display:inline-flex;align-items:center;justify-content:center;height:30px;padding:0 12px;border:0;border-radius:999px;background:#fff;color:#333;font-size:13px;line-height:1;text-decoration:none;cursor:pointer}
.editor-media .editor-media-action.danger{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca}

/***** 到期/提醒 *****/
.due{background:#fff7f7;border:1px solid #ffdede}
.banner{background:#fff4e5;border:1px solid #ffd7a8;color:#a05000;padding:10px 12px;border-radius:10px;margin-bottom:12px;}

/***** 分页 *****/
.pager{margin-top:6px}
.pager a,.pager strong{display:inline-block;margin-right:8px;padding:6px 10px;border-radius:999px;border:1px solid var(--c-border);background:#fff;text-decoration:none;color:#556}
.pager strong{background:var(--c-primary);border-color:var(--c-primary);color:#fff}

/***** 登录页 *****/
.login-box{max-width:420px;margin:80px auto 0 auto;background:#fff;border:1px solid var(--c-border);border-radius:14px;padding:18px 20px;box-shadow:0 18px 36px var(--c-shadow)}
.login-box h1{font-size:20px;margin:0 0 12px 0}
.login-box .actions{margin-top:12px}

/***** 细节 *****/
a{color:inherit}

/***** 响应式：平板（<= 992px） *****/
@media (max-width: 992px){
.container{padding:16px}
.search{gap:8px}
.item{padding:14px;border-radius:12px}
#content{min-height:240px}
}

/***** 响应式：手机（<= 600px） *****/
@media (max-width: 600px){
.container{padding:14px}
.header{flex-wrap:wrap;gap:10px}
.search{flex-direction:column;gap:10px}
.search input[type=text]{min-width:100%;width:100%}
.search button{width:100%}
.btn{padding:9px 12px}
.list{gap:10px}
.item{padding:12px;border-radius:12px}
.item .actions{margin-top:6px}
.item .actions a,.item .actions .btn-link{padding:8px 14px;font-size:15px}
#content{min-height:220px}
.login-box{margin:40px auto 0 auto;padding:16px}
.image-viewer-nav{font-size:20px;padding:8px 12px}
.image-viewer-prev{left:10px}
.image-viewer-next{right:10px}
.image-viewer-content{max-width:95vw;max-height:95vh}
}