:root {
    --bg-black: #0D0D0D;
    --pulse-purple: #BB86FC;
    --phase-gold: #CFD8DC;
    --wave-blue: #03DAC6;
    --text-gray: #A0A0A0;
    --border-color: #333333;
}

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

.mono-font {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

.navbar {
    background-color: rgba(13, 13, 13, 0.95);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

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

.nav-link {
    color: #FFFFFF !important;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0 10px;
    transition: color 0.3s ease;
}

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

.hero-section {
    padding: 150px 0 100px;
    position: relative;
    overflow: hidden;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 50px;
    border-left: 4px solid var(--pulse-purple);
    padding-left: 20px;
}

.card {
    background-color: #1A1A1A;
    border: 1px solid var(--border-color);
    border-radius: 0;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    border-color: var(--pulse-purple);
    transform: translateY(-5px);
}

.footer {
    padding: 50px 0;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-gray);
}

/* 聲波背景動畫 */
.wave-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.3;
}

.btn-outline-primary {
    color: var(--pulse-purple);
    border-color: var(--pulse-purple);
    border-radius: 0;
}

.btn-outline-primary:hover {
    background-color: var(--pulse-purple);
    border-color: var(--pulse-purple);
    color: #000;
}

.tech-label {
    font-size: 0.7rem;
    color: var(--wave-blue);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
    display: block;
}