:root {
    --bg-dark: #1B263B;
    --accent-green: #00FF87;
    --accent-purple: #7B2CBF;
    --text-white: #E0E1DD;
    --grid-line: rgba(224, 225, 221, 0.1);
}

body {
    background-color: var(--bg-dark);
    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', monospace;
}

.navbar {
    background-color: rgba(27, 38, 59, 0.95);
    border-bottom: 1px solid var(--accent-green);
    backdrop-filter: blur(10px);
}

.navbar-brand, .nav-link {
    color: var(--text-white) !important;
}

.nav-link:hover {
    color: var(--accent-green) !important;
}

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at center, #2c3e50 0%, #1B263B 100%);
    overflow: hidden;
}

/* 網格背景效果 */
.grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 0;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 255, 135, 0.2);
    color: var(--text-white);
    transition: all 0.3s ease;
}

.card:hover {
    border-color: var(--accent-green);
    box-shadow: 0 0 15px rgba(0, 255, 135, 0.3);
}

.text-accent-green { color: var(--accent-green); }
.text-accent-purple { color: var(--accent-purple); }

.btn-outline-accent {
    border: 1px solid var(--accent-green);
    color: var(--accent-green);
}

.btn-outline-accent:hover {
    background-color: var(--accent-green);
    color: var(--bg-dark);
}

footer {
    border-top: 1px solid var(--grid-line);
    padding: 40px 0;
    background: #0d131d;
}

/* 動態波形動畫模擬 */
@keyframes wave {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.wave-container {
    position: absolute;
    bottom: 0;
    width: 200%;
    height: 100px;
    opacity: 0.3;
    pointer-events: none;
}