:root {
    --bg-deep-blue: #0D1B2A;
    --ionizing-blue: #00E5FF;
    --neutron-gray: #455A64;
    --decay-green: #76FF03;
    --text-white: #E0E1DD;
    --glow-blue: rgba(0, 229, 255, 0.5);
}

body {
    background-color: var(--bg-deep-blue);
    color: var(--text-white);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden;
}

.mono-font {
    font-family: 'JetBrains Mono', 'Courier New', Courier, monospace;
}

/* 導覽列樣式 */
.navbar {
    background-color: rgba(13, 27, 42, 0.95);
    border-bottom: 1px solid var(--ionizing-blue);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    color: var(--ionizing-blue) !important;
    font-weight: 800;
    letter-spacing: 2px;
}

.nav-link {
    color: var(--text-white) !important;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

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

/* 原子美學按鈕 */
.btn-atomic {
    background: transparent;
    border: 1px solid var(--ionizing-blue);
    color: var(--ionizing-blue);
    padding: 10px 25px;
    border-radius: 0;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.btn-atomic:hover {
    background: var(--ionizing-blue);
    color: var(--bg-deep-blue);
    box-shadow: 0 0 20px var(--glow-blue);
}

/* 切倫科夫輻射動效背景 */
.cherenkov-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 50% 50%, #1B263B 0%, #0D1B2A 100%);
}

.cherenkov-glow {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--ionizing-blue);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--ionizing-blue);
    animation: pulse-glow 4s infinite;
}

@keyframes pulse-glow {
    0% { opacity: 0.1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
    100% { opacity: 0.1; transform: scale(1); }
}

/* 頁尾 */
footer {
    border-top: 1px solid var(--neutron-gray);
    padding: 50px 0;
    background: #0b141d;
}

.footer-domain {
    color: var(--ionizing-blue);
    font-size: 0.8rem;
}