:root {
    --void-purple: #12012C;
    --entangle-cyan: #00FFFF;
    --ice-silver: #E8E8E8;
    --neuron-gold: #FFD700;
    --dark-bg: #090118;
    --glass-bg: rgba(18, 1, 44, 0.7);
    --border-cyan: rgba(0, 255, 255, 0.3);
}

body {
    background-color: var(--dark-bg);
    color: var(--ice-silver);
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

/* 虹彩金屬質感文字 */
.iridescent-text {
    background: linear-gradient(45deg, #00FFFF, #FF00FF, #FFD700, #00FFFF);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: iridescent 10s ease infinite;
}

@keyframes iridescent {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 背景量子隧道效應脈衝 */
body::before {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(18, 1, 44, 0) 0%, rgba(9, 1, 24, 1) 100%);
    pointer-events: none;
    z-index: -1;
}

.quantum-pulse {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(0, 255, 255, 0.05) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.2); opacity: 0.6; }
}

/* Navbar 客製化 */
.navbar {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-cyan);
}

.navbar-brand, .nav-link {
    color: var(--entangle-cyan) !important;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.nav-link:hover {
    color: var(--neuron-gold) !important;
    text-shadow: 0 0 10px var(--neuron-gold);
}

/* 按鈕位元翻轉效果 */
.btn-quantum {
    background: transparent;
    border: 1px solid var(--entangle-cyan);
    color: var(--entangle-cyan);
    padding: 10px 25px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
    text-transform: uppercase;
    font-weight: bold;
    border-radius: 0;
}

.btn-quantum:hover {
    background: var(--entangle-cyan);
    color: var(--void-purple);
    box-shadow: 0 0 20px var(--entangle-cyan);
}

/* 玻璃擬態卡片 */
.quantum-card {
    background: var(--glass-bg);
    border: 1px solid var(--border-cyan);
    padding: 2rem;
    border-radius: 0;
    transition: transform 0.3s, box-shadow 0.3s;
    height: 100%;
}

.quantum-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.2);
    border-color: var(--entangle-cyan);
}

/* Footer */
footer {
    border-top: 1px solid var(--border-cyan);
    padding: 40px 0;
    background: var(--void-purple);
    font-size: 0.8rem;
    color: rgba(232, 232, 232, 0.5);
}

.navbar-toggler {
    border-color: var(--entangle-cyan);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 32 32' xmlns='http://www.w3.org/2000/svg'%3维护%3Cpath stroke='rgba(0, 255, 255, 1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 8h24M4 16h24M4 24h24'/%3E%3C/svg%3E");
}