:root {
    --bg-deep: #050508;       /* 深空黑 */
    --neon-cyan: #00f3ff;     /* 虫洞核心青色 */
    --neon-dim: rgba(0, 243, 255, 0.2); /* 暗淡光晕 */
    --text-main: #e0e6ed;     /* 银灰文字 */
    --accent-orange: #ff9900; /* 强调色 */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Courier New', 'Roboto Mono', monospace; /* 等宽字体，科技感 */
    background-color: var(--bg-deep);
    color: var(--text-main);
    padding-top: 70px;
    min-height: 100vh;
    /* 酷炫背景：网格线模拟全息空间 */
    background-image: 
        linear-gradient(var(--bg-deep) 0%, transparent 100%),
        linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 40px 40px, 40px 40px;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    /* 整体边框光晕 */
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
    border-left: 1px solid var(--neon-dim);
    border-right: 1px solid var(--neon-dim);
}

/* 顶部固定 Header */
header {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 800px;
    height: 70px;
    background: rgba(5, 5, 8, 0.85);
    backdrop-filter: blur(10px);     /* 毛玻璃特效 */
    z-index: 1000;
    border-bottom: 1px solid var(--neon-cyan);
    border-left: 1px solid var(--neon-dim);
    border-right: 1px solid var(--neon-dim);
    box-shadow: 0 5px 20px rgba(0, 243, 255, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 25px;
    height: 100%;
}

.logo-area {
    /* 黑色 Logo 反转为白色发光，如果是彩色 Logo 可删除此行 */
    filter: invert(1) drop-shadow(0 0 5px var(--neon-cyan)); 
    transition: transform 0.3s;
}

.logo-area:hover {
    transform: scale(1.05);
}

.logo-img {
    height: 45px;
    display: block;
    cursor: pointer;
}

.search-area {
    display: flex;
    align-items: center;
    background: rgba(0,0,0,0.5);
    border: 1px solid var(--neon-dim);
    border-radius: 4px;
    padding: 5px;
    transition: 0.3s;
}

.search-area:hover, .search-area:focus-within {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-dim);
}

#search-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--neon-cyan);
    padding: 5px;
    font-size: 14px;
    width: 120px;
    font-family: inherit;
}

#search-input::placeholder {
    color: rgba(0, 243, 255, 0.3);
}

.search-btn {
    background: var(--neon-dim);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    cursor: pointer;
    padding: 2px 8px;
    font-size: 12px;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: 0.2s;
}

.search-btn:hover {
    background: var(--neon-cyan);
    color: #000;
}

.dashed-line { display: none; }

/* 内容区域 */
#timeline {
    width: 100%;
    padding-bottom: 100px;
}

.day-block {
    position: relative;
    border-bottom: 1px dashed var(--neon-dim);
    min-height: 150px;
    transition: background 0.3s;
}

.day-block:hover {
    background: rgba(0, 243, 255, 0.02);
}

/* 日期吸附效果 */
.date-sticky {
    position: sticky;
    top: 70px;
    text-align: right;
    padding: 8px 15px;
    color: var(--neon-cyan);
    font-size: 14px;
    letter-spacing: 2px;
    text-shadow: 0 0 5px var(--neon-dim);
    background: linear-gradient(90deg, transparent, rgba(5, 5, 8, 0.95) 30%);
    backdrop-filter: blur(5px);
    z-index: 10;
    border-bottom: 1px solid var(--neon-dim);
}

.items-container {
    padding: 30px;
}

.item {
    margin-bottom: 30px;
    word-break: break-all;
    position: relative;
    line-height: 1.8;
    color: var(--text-main);
}

/* --- 图片样式修正版 (正常颜色) --- */
.item img {
    max-width: 100%;
    border: 1px solid var(--neon-dim);
    border-radius: 4px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.8);
    transition: all 0.3s ease;
    /* 默认稍微压暗一点点，保护眼睛，但不改色 */
    filter: brightness(0.85); 
}

.item img:hover {
    /* 悬停时高亮并辉光 */
    filter: brightness(1.1); 
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
    transform: scale(1.01);
}

.item a {
    color: var(--accent-orange);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-orange);
    transition: 0.2s;
}

.item a:hover {
    background: var(--accent-orange);
    color: #000;
}

/* 管理员按钮 */
.admin-controls {
    display: none;
    margin-top: 10px;
    text-align: right;
    opacity: 0.6;
    transition: opacity 0.3s;
}
.item:hover .admin-controls {
    opacity: 1;
}

.delete-btn {
    color: #ff4444;
    font-size: 12px;
    cursor: pointer;
    background: transparent;
    border: 1px solid #ff4444;
    padding: 2px 6px;
    text-transform: uppercase;
}
.delete-btn:hover {
    background: #ff4444;
    color: #fff;
    box-shadow: 0 0 10px rgba(255, 68, 68, 0.5);
}

body.admin-mode .admin-controls {
    display: block;
}

/* 弹窗样式 */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hidden { display: none; }

.modal-content {
    background: #0a0a10;
    padding: 2px; /* 渐变边框层 */
    background-image: linear-gradient(135deg, var(--neon-cyan), var(--bg-deep));
    border-radius: 6px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 0 30px rgba(0, 243, 255, 0.2);
}

.modal-inner {
    background: #050508;
    padding: 20px;
    border-radius: 4px;
}

.modal-content h3 {
    color: var(--neon-cyan);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-bottom: 1px solid var(--neon-dim);
    padding-bottom: 10px;
}

#preview-area {
    margin: 15px 0;
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--neon-dim);
    padding: 10px;
    color: var(--text-main);
    background: rgba(255,255,255,0.02);
}
#preview-area img { max-width: 100%; }

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    margin-top: 20px;
}

.modal-actions button {
    padding: 8px 20px;
    cursor: pointer;
    font-family: inherit;
    text-transform: uppercase;
    font-weight: bold;
    border: 1px solid transparent;
    transition: 0.3s;
}

#cancel-btn {
    background: transparent;
    border: 1px solid #555;
    color: #888;
}
#cancel-btn:hover {
    border-color: #fff;
    color: #fff;
}

#save-btn {
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-dim);
}
#save-btn:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 20px var(--neon-cyan);
}

/* =========================================
   新增：标题/备注功能样式
   ========================================= */

/* 弹窗里的标题输入框样式 */
#paste-title {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: none;
    border-bottom: 1px solid var(--neon-dim);
    color: var(--accent-orange); /* 用橙色突出标题输入 */
    padding: 10px 5px;
    margin-bottom: 10px;
    font-family: inherit;
    font-size: 16px;
    outline: none;
    transition: 0.3s;
}

#paste-title:focus {
    border-color: var(--neon-cyan);
    background: rgba(0, 243, 255, 0.05);
}

/* 列表显示时的标题样式 */
.item-title {
    color: var(--accent-orange);
    font-weight: bold;
    font-size: 1.1em;
    margin-bottom: 8px;
    padding-bottom: 5px;
    border-bottom: 1px dashed var(--neon-dim);
    letter-spacing: 1px;
}