@media(prefers-color-scheme:dark){:root{--primary-color:#4a6fa5;--secondary-color:#64b5f6;--accent-color:#ff6b6b;--text-color:#e0e0e0;--light-bg:#121212;--white:#1e1e1e;--dark-bg:#0a0a0a;--dark-text:#fff;--shadow:0 4px 15px rgba(0,0,0,0.5);--border-radius:8px;--transition:all .3s ease;--surface-elevation-1:#1e1e1e;--surface-elevation-2:#252525;--border-color:#404040;--hover-overlay:rgba(255,255,255,0.08);--disabled-color:#5a5a5a}body{background-color:var(--light-bg);color:var(--text-color);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.hero{color:var(--text-color)}.card{background:var(--surface-elevation-1);color:var(--text-color);border:1px solid var(--border-color);box-shadow:var(--shadow)}.dark-section{background:var(--dark-bg);color:var(--dark-text)}.hero{background:linear-gradient(135deg,#1a365d 0,#2c5282 50%,#4a6fa5 100%)}header{background:var(--surface-elevation-1);border-bottom:1px solid var(--border-color)}.nav-menu a{color:var(--text-color)}.nav-menu a:hover,.nav-menu a:focus,.nav-menu a[aria-current="page"]{background:var(--secondary-color);color:var(--white)}.contrast-item{border:1px solid var(--border-color)}.bw-contrast{background:linear-gradient(135deg,#1a1a1a,#e0e0e0);color:#fff;text-shadow:1px 1px 2px rgba(0,0,0,0.8)}.image-container img{filter:brightness(0.9) contrast(1.1);border-color:var(--border-color)}.conclusion{border-left-color:var(--secondary-color);background:rgba(100,181,246,0.1)}a:not(.cta-button){color:var(--secondary-color)}a:not(.cta-button):hover{border-bottom-style:solid}.cta-button{background:var(--accent-color);color:var(--white)}.cta-button:hover,.cta-button:focus{background:#ff5252;box-shadow:0 6px 16px rgba(255,82,82,0.4)}.list li{border-bottom-color:var(--border-color)}.section-title{color:var(--secondary-color);text-shadow:0 2px 4px rgba(0,0,0,0.3)}.dark-section .section-title{color:var(--dark-text)}.logo{color:var(--secondary-color)}footer{color:white}}