@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600&display=swap');

body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: radial-gradient(circle at 20% 20%, #2b2d3a 0%, #1d1f2b 35%, #141520 70%);
    font-family: 'Fira Code', monospace;
    transition: background 0.5s ease;
}

.window {
    background-color: #282a36;
    border-radius: 12px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.65);
    width: auto;
    min-width: 720px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.5s ease;
}

.title-bar {
    background-color: #1f2030;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #11121a;
    position: relative;
}

.buttons {
    display: flex;
    gap: 8px;
}

.btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}
.btn:hover { transform: scale(1.1); }

.close { background-color: #ff5555; }
.minimize { background-color: #f1fa8c; }
.maximize { background-color: #50fa7b; }

.filename {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    color: #d6d7e0;
    font-size: 13px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-weight: 600;
    letter-spacing: 0.2px;
    transition: all 0.3s ease;
}

.code-area {
    padding: 20px 26px;
    color: #f8f8f2;
    font-size: 15px;
    line-height: 1.35; 
    white-space: pre;
    font-feature-settings: "liga" on;
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: linear-gradient(180deg, rgba(68, 71, 90, 0.28) 0%, rgba(40, 42, 54, 0.65) 100%);
    min-height: 300px;
    transition: all 0.5s ease;
}

/* === 语法高亮 === */
.comment { color: #6272a4; font-style: italic; }
.kw-storage { color: #bd93f9; } 
.kw-def     { color: #ff79c6; } 
.kw-access  { color: #ff5555; } 
.type { color: #f1fa8c; }
.string { color: #50fa7b; }
.macro-error { color: #ff5555; font-weight: bold; }
.attr { color: #8be9fd; }
.paren { color: #8be9fd; } 
.brace { color: #f1fa8c; } 
.bracket-sq { color: #8be9fd; } 
.semicolon { color: #d6d7e0; } 

/* Git Diff 头部与符号 */
.header-pre { color: #ffb86c; font-weight: bold; }
.header-cur { color: #8be9fd; font-weight: bold; }
.sep { color: #54576b; margin-right: 12px; opacity: 0.8; }

.diff-add { color: #50fa7b; font-weight: bold; } 
.diff-del { color: #ff5555; font-weight: bold; } 
.diff-neutral { color: #6b7086; } 

/* Self 关键字高亮 */
.self-kw { color: #8be9fd; font-style: italic; }
.self-prop { color: #bd93f9; }

/* 行号 */
.line-num {
    display: inline-block;
    width: 22px;
    color: #6d7181;
    text-align: right;
    margin-right: 10px;
    user-select: none;
    font-size: 12px;
    opacity: 0.6;
    transition: all 0.3s ease;
}

/* 悬浮来源提示 */
.code-line {
    position: relative;
    display: block;
    padding-right: 170px;
    transition: all 0.3s ease;
}
.code-line::after {
    content: attr(data-source);
    position: absolute;
    right: 0;
    top: 0;
    color: #9ea0a6;
    font-size: 12px;
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.18s ease;
    pointer-events: none;
    white-space: pre;
    max-width: 46ch;
    overflow: hidden;
    text-overflow: ellipsis;
}
.code-line:hover::after { opacity: 1; }