@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
    --color-primary: 224 231 255; /* gray-200 */
    --color-background: 17 24 39;  /* gray-900 */
    --color-accent: 34 211 238;   /* cyan-400 */
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
    background-color: rgb(var(--color-background));
    color: rgb(var(--color-primary));
}

#header {
    background-color: transparent;
}

#header.scrolled {
    background-color: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

.nav-link {
    @apply text-gray-300 hover:text-white transition-colors duration-300 relative py-1;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: rgb(var(--color-accent));
    transition: width 0.3s ease-in-out;
}

.nav-link:hover::after {
    width: 100%;
}

.mobile-nav-link {
    @apply text-2xl text-gray-300 hover:text-white my-4 transition-colors duration-300;
}


.cursor {
    display: inline-block;
    width: 3px;
    height: 1em;
    background-color: rgb(var(--color-accent));
    margin-left: 8px;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.section-container {
    opacity: 0;
    transform: translateY(30px);
}

.section-title {
    @apply text-3xl md:text-4xl font-bold text-white mb-4 tracking-wide;
}

.section-subtitle {
    @apply max-w-3xl mx-auto text-gray-400 text-lg;
}

.scope-card, .insight-card {
    @apply bg-gray-800 rounded-xl p-8 transition-all duration-300 hover:shadow-lg hover:shadow-cyan-500/10 hover:-translate-y-2;
    border: 1px solid transparent;
}

.scope-card:hover, .insight-card:hover {
    border-color: rgba(var(--color-accent), 0.3);
}