:root {
    --text: #1d1d1f;
    --muted: #6e6e73;
    --bg: #ffffff;
    --section: #f5f5f7;
    --accent: #0071e3;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial;
    color: var(--text);
    background: var(--bg);
}

/* NAV */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.nav-link {
    color: var(--muted);
}

.nav-link:hover {
    color: var(--text);
}

/* HERO */
.hero {
    padding: 140px 0 100px;
    text-align: center;
    background: linear-gradient(to bottom, #ffffff, #f5f5f7);
}

.hero h1 {
    font-size: 56px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.hero p {
    font-size: 22px;
    color: var(--muted);
    max-width: 720px;
    margin: 20px auto;
}

.btn-primary {
    background: var(--accent);
    border: none;
    border-radius: 999px;
    padding: 10px 22px;
}

.btn-secondary {
    border-radius: 999px;
    padding: 10px 22px;
    border: 1px solid #d2d2d7;
    background: transparent;
}

/* SECTIONS */
section {
    padding: 90px 0;
}

.section-dark {
    background: var(--section);
}

.section-title {
    font-size: 40px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 10px;
}

.section-sub {
    text-align: center;
    color: var(--muted);
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 50px;
}

/* CARDS */
.card {
    border: none;
    border-radius: 20px;
    background: #fff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    padding: 30px;
    height: 100%;
}

.muted {
    color: var(--muted);
}

/* FLOW */
.flow {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    text-align: center;
}

.flow div {
    max-width: 260px;
}

/* CAROUSEL */
.carousel-caption {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    padding: 1rem 0.75rem 0.75rem 0.75rem;
    left: 15%;
    right: 15%;
    bottom: 2rem;
    font-size: 0.95rem;
    text-align: left;
}

.carousel-caption h5 {
    font-size: 1.15rem;
    color: #fff !important;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
    margin-bottom: 0.3em;
}

.carousel-caption p {
    font-size: 0.95rem;
    color: #fff !important;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
    margin-bottom: 0;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    filter: invert(1);
    opacity: 0.85;
}

footer {
    padding: 60px 0;
    text-align: center;
    color: var(--muted);
    border-top: 1px solid #eaeaea;
}