/* --- Design System --- */
:root {
    --primary-color: #E50000;
    --text-color: #111111;
    --background-color: #FFFFFF;
    --accent-color: #C1C7CD;
    --surface-color: #F8F9FA;
    --border-radius: 0.25rem;
}

body {
    font-family: 'IBM Plex Sans', sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
}

h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.btn-primary:hover {
    background-color: #c40000;
    border-color: #c40000;
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--text-color);
    color: var(--text-color);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
}

.btn-secondary:hover {
    background-color: var(--text-color);
    color: var(--background-color);
}

.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://picsum.photos/seed/hero-bw-summit/1600/900') no-repeat center center;
    background-size: cover;
    color: var(--background-color);
    padding: 8rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 1rem auto;
}

.trust-strip {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.8;
}

.logo-strip img {
    max-height: 40px;
    filter: grayscale(100%) brightness(300%);
    opacity: 0.8;
    transition: all 0.3s ease;
}

.logo-strip img:hover {
    filter: none;
    opacity: 1;
}

.funding-progress {
    position: sticky;
    top: 0;
    z-index: 1020;
    background-color: var(--surface-color);
    padding: 1rem 0;
    border-bottom: 1px solid #e0e0e0;
}

.progress {
    height: 2rem;
    font-size: 1rem;
    border-radius: var(--border-radius);
}

.progress-bar {
    background-color: var(--primary-color);
}

.section {
    padding: 5rem 0;
}

.bchb-divider {
    height: 5px;
    background: linear-gradient(to right, #fff, #E50000, #fff, #E50000, #fff);
    border: 0;
    margin: 3rem 0;
}

.footer {
    background-color: var(--text-color);
    color: var(--background-color);
    padding: 3rem 0;
}

.footer a {
    color: var(--accent-color);
    text-decoration: none;
}

.footer a:hover {
    color: var(--background-color);
}