:root {
    --carbon-black: #121212;
    --warning-orange: #FF8C00;
    --signal-grey: #E0E0E0;
    --path-green: #32CD32;
    --dark-grey: #1e1e1e;
    --border-grey: #333333;
}

body {
    background-color: var(--carbon-black);
    color: var(--signal-grey);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.mono-font {
    font-family: 'Fira Code', 'Courier New', monospace;
}

/* 導覽列樣式 */
.navbar {
    background-color: rgba(18, 18, 18, 0.95);
    border-bottom: 1px solid var(--border-grey);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 800;
    color: var(--warning-orange) !important;
    letter-spacing: 1px;
}

.nav-link {
    color: var(--signal-grey) !important;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    margin: 0 10px;
    transition: color 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--warning-orange) !important;
}

/* 按鈕樣式 */
.btn-flux {
    background-color: transparent;
    border: 1px solid var(--warning-orange);
    color: var(--warning-orange);
    border-radius: 0;
    padding: 10px 25px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all 0.3s;
}

.btn-flux:hover {
    background-color: var(--warning-orange);
    color: var(--carbon-black);
}

/* 卡片與模組化結構 */
.flux-card {
    background-color: var(--dark-grey);
    border-left: 4px solid var(--warning-orange);
    padding: 30px;
    margin-bottom: 30px;
    transition: transform 0.3s;
}

.flux-card:hover {
    transform: translateY(-5px);
}

.section-title {
    color: var(--warning-orange);
    text-transform: uppercase;
    font-weight: 800;
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--warning-orange);
}

/* 掃描線效果 */
.scanline {
    width: 100%;
    height: 100px;
    z-index: 7;
    background: linear-gradient(0deg, rgba(0, 0, 0, 0) 0%, rgba(255, 140, 0, 0.05) 50%, rgba(0, 0, 0, 0) 100%);
    opacity: 0.1;
    position: absolute;
    bottom: 100%;
    animation: scanline 8s linear infinite;
}

@keyframes scanline {
    0% { bottom: 100%; }
    100% { bottom: -100%; }
}

/* 頁尾樣式 */
footer {
    background-color: #0a0a0a;
    border-top: 1px solid var(--border-grey);
    padding: 60px 0 30px;
}

.footer-logo {
    color: var(--warning-orange);
    font-weight: 800;
    font-size: 1.5rem;
}

.footer-link {
    color: #888;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-link:hover {
    color: var(--warning-orange);
}