:root {
    /* --- 全域背景與文字 --- */
    --bg-color: #f8f9fa; /* 稍微帶灰的白 */
    --text-main: #24292f;
    --text-sub: #57606a;
    --accent: #0969da;
    
    /* --- Code Window (Light Mode) --- */
    --window-bg: rgba(255, 255, 255, 0.65); /* 白色的玻璃 */
    --window-border: rgba(31, 35, 40, 0.15);
    --window-header: rgba(230, 230, 230, 0.7);
    --window-title: #57606a;
    --window-text: #24292f;
    
    /* JSON 語法高亮 (Light Mode) */
    --json-key: #b35900;
    --json-string: #116329;
    --json-comment: #6e7781;
    
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    /* --- 全域背景與文字 --- */
    --bg-color: #0d1117;
    --text-main: #e6edf3;
    --text-sub: #8b949e;
    --accent: #3fb950;
    
    /* --- Code Window (Dark Mode) --- */
    --window-bg: rgba(22, 27, 34, 0.7); /* 深色的玻璃 */
    --window-border: rgba(240, 246, 252, 0.1);
    --window-header: rgba(30, 35, 40, 0.6);
    --window-title: #8b949e;
    --window-text: #e6edf3;
    
    /* JSON 語法高亮 (Dark Mode) */
    --json-key: #ff9f43;
    --json-string: #3fb950;
    --json-comment: #8b949e;
}

* { box-sizing: border-box; }

body {
    font-family: 'JetBrains Mono', 'Noto Sans JP', monospace;
    margin: 0;
    padding: 0;
    line-height: 1.8;
    color: var(--text-main);
    
    /* --- 背景設定與流動動畫 (主要修改處) --- */
    background-color: var(--bg-color);
    
    /* 定義兩個顏色的光暈：左上藍色、右下綠色 */
    background-image: 
        radial-gradient(at 0% 0%, rgba(9, 105, 218, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(39, 201, 63, 0.15) 0px, transparent 50%);
        
    /* 放大背景尺寸以允許移動 */
    background-size: 140% 140%;
    
    /* 啟動呼吸動畫 */
    animation: bg-flow 15s ease-in-out infinite alternate;
    
    transition: background-color var(--transition), color var(--transition);
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

/* Dark Mode 的背景光暈調整 (更適合暗黑環境) */
[data-theme="dark"] body {
    background-image: 
        radial-gradient(at 0% 0%, rgba(56, 139, 253, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(46, 160, 67, 0.1) 0px, transparent 50%);
}

/* 背景動畫關鍵影格 */
@keyframes bg-flow {
    0% {
        background-position: 0% 0%;
        background-size: 120% 120%;
    }
    100% {
        background-position: 100% 100%;
        background-size: 140% 140%;
    }
}

.container {
    width: 100%;
    max-width: 800px;
    padding: 4rem 2rem;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.theme-toggle {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    opacity: 0.8;
    transition: opacity 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}
.theme-toggle:hover { opacity: 1; }

header {
    margin-bottom: 3rem;
    text-align: center;
    width: 100%;
}

@media (max-width: 600px) {
    header { margin-top: 2rem; }
}

h1 {
    font-weight: 700;
    letter-spacing: 0.05em;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.subtitle {
    color: var(--text-sub);
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
}

footer {
    margin-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-sub);
    font-family: 'JetBrains Mono', monospace;
    text-align: center;
    opacity: 0.7;
    width: 100%;
}

/* --- Typing Animation --- */
.typing-text {
    display: inline-block;
    border-right: 5px solid var(--accent);
    white-space: nowrap;
    margin: 0 auto;
    letter-spacing: 0.05em;
    font-family: 'JetBrains Mono', monospace; 
    clip-path: inset(0 100% 0 0); 
    animation: typing 3.5s steps(36, end) forwards, blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { clip-path: inset(0 100% 0 0); }
    to { clip-path: inset(0 0 0 0); }
}

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--accent); }
}


/* --- JSON Window --- */
.code-window {
    /* 使用變數 */
    background-color: var(--window-bg) !important;
    border: 1px solid var(--window-border);
    
    /* 這裡的模糊效果會因為有流動背景而變得非常漂亮 */
    backdrop-filter: blur(12px); 
    -webkit-backdrop-filter: blur(12px);
    
    border-radius: 12px; 
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    
    margin-bottom: 1rem;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    width: fit-content;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    display: block;
    overflow: hidden;
}

.window-header {
    background-color: var(--window-header);
    padding: 10px 15px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--window-border);
    width: 100%;
}

.code-window:hover {
    transform: translateY(-5px); 
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .code-window:hover {
    box-shadow: 0 30px 60px rgba(0, 255, 65, 0.15);
    border-color: rgba(63, 185, 80, 0.5); 
}

.traffic-lights { display: flex; gap: 8px; }
.traffic-light {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px; 
    font-weight: bold;
    color: rgba(0, 0, 0, 0); 
    transition: color 0.2s, filter 0.2s;
    cursor: pointer;
}
.traffic-light.red { background-color: #ff5f56; }
.traffic-light.yellow { background-color: #ffbd2e; }
.traffic-light.green { background-color: #27c93f; }

.traffic-lights:hover .traffic-light {
    color: rgba(0, 0, 0, 0.5); 
}

.traffic-light.red::before { content: "✕"; }
.traffic-light.yellow::before { content: "−"; }
.traffic-light.green::before { content: "＋"; }

.traffic-light:hover {
    filter: brightness(0.8);
}


/*******-----------------紅色按鈕---------------*/
@keyframes tv-off-refined {
    0% { transform: scale(1, 1); filter: brightness(1) contrast(1) grayscale(0); }
    15% { filter: brightness(2) contrast(5) grayscale(1) opacity(0.8); transform: scale(1.02, 0.98); }
    35% { filter: brightness(1.5) contrast(10) grayscale(1); transform: scale(1.1, 0.01); }
    65% { filter: brightness(20); transform: scale(0.2, 0.01); opacity: 1; }
    100% { transform: scale(0, 0); opacity: 0; }
}

.tv-off-active {
    animation: tv-off-refined 1.2s cubic-bezier(0.19, 1, 0.22, 1) forwards !important;
    position: relative;
    overflow: hidden;
    pointer-events: none;
}

/* 雪花雜訊層 */
.tv-off-active::after {
    content: "";
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: 
        repeating-conic-gradient(#000 0% 1%, #fff 0% 2%, #000 0% 3%) 50% 50% / 2px 2px,
        repeating-conic-gradient(#fff 0% 1%, #000 0% 2%, #fff 0% 3%) 40% 40% / 3px 3px;
    opacity: 0;
    z-index: 100;
    animation: noise-flash 0.4s steps(2) infinite;
}

@keyframes noise-flash {
    0% { opacity: 0.3; }
    100% { opacity: 0.5; }
}


[data-theme="dark"] .traffic-light {
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .traffic-light.red { box-shadow: 0 0 8px rgba(255, 95, 86, 0.6); }
[data-theme="dark"] .traffic-light.yellow { box-shadow: 0 0 8px rgba(255, 189, 46, 0.6); }
[data-theme="dark"] .traffic-light.green { box-shadow: 0 0 8px rgba(39, 201, 63, 0.6); }

/* 點擊時的震動動畫 */
.traffic-light:active {
    animation: shake 0.2s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-2px); }
    75% { transform: translateX(2px); }
}


/**-----------------------*/

.window-title {
    margin-left: 15px;
    color: var(--window-title);
    font-size: 0.8rem;
    font-family: 'JetBrains Mono', monospace;
}

.window-body {
    padding: 20px 30px;
    overflow-x: auto;  
    color: var(--window-text);
    font-size: 0.95rem;
    line-height: 1.6;
    text-align: left;
}

.code-line {
    display: block;
    white-space: nowrap; 
    text-align: left;
}

.pl-1 { padding-left: 2ch; } 
.pl-2 { padding-left: 4ch; } 

/* JSON Highlights */
.json-key { color: var(--json-key); font-weight: 500; } 
.json-string { color: var(--json-string); } 
.json-comment { color: var(--json-comment); font-style: italic; }

.json-link {
    color: var(--json-string);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-thickness: 1px;
    transition: all 0.2s;
}
.json-link:hover {
    background-color: var(--json-string);
    color: var(--bg-color);
    text-decoration: none;
}

@media (max-width: 600px) {
    .container {
        padding: 2rem 1rem;
        align-items: stretch; 
    }
    
    .code-window {
        width: 100%; 
        margin: 0 0 2rem 0;
    }
    
    .window-body {
        padding: 15px;
    }
    
    .code-line {
        white-space: pre-wrap; 
        word-break: break-word;
    }
}



/* --- Terminal --- */
#terminal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 10, 10, 0.95); 
    z-index: 9999;
    padding: 2rem;
    font-family: 'JetBrains Mono', monospace;
    color: #01d335; 
    overflow-y: auto;
    backdrop-filter: blur(5px);
}

#terminal-overlay::before {
    content: " ";
    display: block;
    position: absolute;
    top: 0; left: 0; bottom: 0; right: 0;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), 
                linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    z-index: 10000;
    background-size: 100% 4px, 3px 100%;
    pointer-events: none; 
}

#terminal-overlay.open {
    display: block;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.terminal-content { max-width: 800px; margin: 0 auto; }
.terminal-output { margin-bottom: 1rem; white-space: pre-wrap; line-height: 1.6; }
.input-line { display: flex; align-items: center; }
.prompt { color: #a0a0a0; margin-right: 10px; font-weight: bold; }
#terminal-input { background: transparent; border: none; color: #01d335; font-family: 'JetBrains Mono', monospace; font-size: 1rem; flex: 1; outline: none; caret-color: #01d335; }
.cmd-result { color: #ffffff; margin-bottom: 1rem; opacity: 0.9; }
.cmd-error { color: #ff5555; margin-bottom: 1rem; }


.subtitle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px; 
    color: var(--text-sub);
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
}

.icon-link {
    color: var(--text-sub);
    text-decoration: none;
    transition: color var(--transition), transform 0.2s;
    display: inline-flex;
    align-items: center;
}

/* 滑鼠移上去 GitHub Icon 的效果 */
.icon-link:hover {
    color: var(--accent); 
    transform: translateY(-2px);
}

.separator {
    opacity: 0.5;
    margin: 0 2px;
}