:root {
    --bg-dark: #050508;
    --text-main: #f0f0f5;
    --text-muted: #9494a0;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --accent: #e0e0e0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Background Canvas */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(5, 5, 8, 0.7);
    border-bottom: 1px solid var(--glass-border);
    padding: 1.5rem 5%;
}

.logo {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #fff;
}

/* Main Layout */
main {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding: 0 5%;
}

section {
    width: 100%;
    max-width: 1100px;
    padding: 8rem 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Typography & Headers */
.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 600;
    margin-bottom: 3.5rem;
    letter-spacing: -0.02em;
}

/* 1. Hero */
#hero {
    min-height: 100vh;
    text-align: center;
    align-items: center;
    padding-top: 12rem;
}

#hero h1 {
    font-size: clamp(2.8rem, 6vw, 5.5rem);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 2rem;
    background: linear-gradient(180deg, #ffffff 0%, #a0a0b0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    max-width: 950px;
}

#hero .subtitle {
    font-size: clamp(1.2rem, 2vw, 1.4rem);
    color: var(--text-muted);
    font-weight: 400;
    max-width: 750px;
}

/* Cards & Glassmorphism */
.soft-glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), background 0.4s ease;
}

.soft-glass:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.05);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.card {
    padding: 3rem 2.5rem;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.card p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Method Segment */
.content-block {
    padding: 4.5rem;
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--text-muted);
    line-height: 1.8;
}

.content-block strong {
    color: #fff;
    font-weight: 500;
}

/* Umbrella Segment */
#umbrella .description {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-muted);
    max-width: 850px;
    line-height: 1.8;
}

/* Audience List */
.list-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.list-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 16px;
    font-weight: 400;
    font-size: 1.15rem;
    color: #fff;
    transition: background 0.3s ease;
}

.list-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Vision / Footer */
#vision {
    padding-bottom: 12rem;
    text-align: center;
    align-items: center;
}

.closing-vision {
    font-size: clamp(1.3rem, 3vw, 2.2rem);
    font-weight: 300;
    color: #fff;
    max-width: 1000px;
    line-height: 1.5;
    letter-spacing: -0.01em;
}

/* Reveal Animations */
.smooth-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.smooth-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .content-block {
        padding: 2.5rem;
    }
    .list-cards {
        grid-template-columns: 1fr;
    }
    .section-title {
        margin-bottom: 2rem;
    }
}