:root {
    --deep-blue: #0f1c2e;
    --signal-red: #e53935;
    --accent-gold: #f5a623;
    --mist-gray: #f4f6fa;
    --card-dark: rgba(19, 33, 56, 0.85);
    --text-light: #f8fbff;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Noto Sans SC', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--mist-gray);
    color: #111827;
    line-height: 1.6;
}

.wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem 4rem;
}

header.hero {
    background: linear-gradient(135deg, #030917 0%, #14243d 35%, #07162b 100%);
    color: var(--text-light);
    padding: 4rem 1.5rem 5rem;
    position: relative;
    overflow: hidden;
}

header.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: url('https://upload.wikimedia.org/wikipedia/commons/e/ef/World_map_%28Mercator_projection%29.svg') center/cover;
    opacity: 0.08;
    pointer-events: none;
}

.hero-content {
    position: relative;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    margin: 0 0 1rem;
    font-weight: 900;
    letter-spacing: 0.05em;
}

.channel-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    padding: 0.6rem 1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(6px);
    margin-bottom: 1rem;
}

.channel-badge img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.6);
}

.channel-badge strong {
    font-size: 1rem;
    letter-spacing: 0.04em;
}

.hero p.sub {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    max-width: 520px;
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
}

.btn {
    border: none;
    padding: 0.95rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 999px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
    background-color: var(--signal-red);
    color: white;
    box-shadow: 0 10px 25px rgba(229, 57, 53, 0.35);
}

.btn.secondary {
    background-color: transparent;
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.45);
}

.btn:hover {
    transform: translateY(-2px);
}

.hero-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 2rem;
}

.hero-metrics span {
    font-size: 0.9rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.85;
}

section {
    margin-top: 4rem;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--deep-blue);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.card {
    background: white;
    border-radius: 18px;
    padding: 1.75rem;
    box-shadow: 0 15px 35px rgba(15, 28, 46, 0.08);
    position: relative;
    overflow: hidden;
}

.card::after {
    content: "";
    position: absolute;
    inset: auto auto 0 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--signal-red), var(--accent-gold));
}

.card h3 {
    margin-top: 0;
    font-size: 1.2rem;
    color: var(--deep-blue);
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.video-card {
    background: #101828;
    color: #f3f4f6;
    border-radius: 16px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    min-height: 260px;
}

.video-card .tag {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-gold);
}

.video-card button,
.video-card a.btn {
    align-self: flex-start;
    border: none;
    padding: 0.65rem 1.3rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    color: white;
    cursor: pointer;
    margin-top: auto;
    text-decoration: none;
}

.split {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    align-items: center;
}

.persona {
    background: var(--card-dark);
    color: var(--text-light);
    border-radius: 22px;
    padding: 2rem;
    box-shadow: 0 30px 45px rgba(7, 11, 18, 0.5);
}

.persona h3 {
    margin-top: 0;
    font-size: 1.8rem;
}

.persona ul {
    padding-left: 1.2rem;
}

.methodology {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.method-step {
    border-left: 4px solid var(--signal-red);
    padding: 1rem 1rem 1rem 1.25rem;
    background: #fff;
    border-radius: 12px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.6);
}

.community {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.community ul {
    padding-left: 1.2rem;
    margin: 0;
}

.whatsapp-card {
    background: var(--deep-blue);
    color: var(--text-light);
    border-radius: 18px;
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: 0 25px 45px rgba(6, 11, 20, 0.4);
}

.whatsapp-card a {
    text-decoration: none;
    text-align: center;
}

.btn.whatsapp {
    background: #25d366;
    color: #0c2912;
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.4);
}

form.newsletter {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

form.newsletter input {
    padding: 0.9rem 1rem;
    border-radius: 999px;
    border: 1px solid #c8d3e1;
    font-size: 1rem;
}

form.newsletter button {
    background: var(--deep-blue);
    color: white;
}

.faq {
    background: #fff;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(38, 51, 77, 0.1);
}

details {
    border-bottom: 1px solid #e1e7f0;
    padding: 1rem 0;
}

details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--deep-blue);
}

footer {
    background: #060b14;
    color: rgba(255, 255, 255, 0.85);
    padding: 2rem 1.5rem;
}

footer .footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-between;
}

footer a {
    color: #f5a623;
    text-decoration: none;
}

@media (max-width: 600px) {
    .hero-metrics {
    flex-direction: column;
    }
    .hero h1 {
    font-size: 2.2rem;
    }
}