:root {
    --bg: #0a0e14;
    --bg-card: #121a24;
    --border: #1e2a3a;
    --text: #e8edf4;
    --muted: #8b9cb3;
    --accent: #22c55e;
    --accent-dim: #16a34a;
    --warning: #fbbf24;
    --error: #f87171;
    --font: "DM Sans", system-ui, sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(34, 197, 94, 0.12), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(59, 130, 246, 0.06), transparent);
}

a {
    color: var(--accent);
}

.wrap {
    max-width: 720px;
    margin: 0 auto;
    padding: 2.5rem 1.25rem 4rem;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

header .lead {
    text-align: center;
}

.lead-stack {
    margin: 0.35rem auto 0;
    max-width: 38rem;
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
}

.lead-stack .lead {
    margin: 0;
    max-width: none;
    text-align: center;
}

.lead-accent {
    padding: 1rem 1.15rem;
    border-radius: 12px;
    border: 1px solid rgba(34, 197, 94, 0.25);
    background: rgba(34, 197, 94, 0.06);
    color: var(--text);
}

.lead-accent strong {
    color: inherit;
}

.brand-title {
    margin: 0 0 1rem;
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text);
}

.header-btc {
    display: block;
    width: 72px;
    height: auto;
    margin: 0 auto 1rem;
    border-radius: 50%;
    box-shadow: 0 8px 32px rgba(251, 191, 36, 0.15);
}

.ebook-pill {
    margin: 0 auto 1.25rem;
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--warning);
    border: 1px solid rgba(251, 191, 36, 0.4);
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    background: rgba(251, 191, 36, 0.08);
}

.lead strong {
    color: var(--text);
    font-weight: 600;
}

.hero-tagline {
    margin: 0 auto 1.35rem;
    max-width: 36rem;
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--muted);
    line-height: 1.5;
}

.card-intro {
    margin: 0 0 1.35rem;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.55;
}

.card-intro-highlight {
    color: var(--accent);
    font-weight: 600;
}

.card.card-contents h2 {
    font-size: 1.35rem;
    margin: 0 0 0.65rem;
    letter-spacing: -0.02em;
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    border-top: 1px solid var(--border);
}

.toc-list li {
    display: grid;
    gap: 0.35rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.toc-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.toc-title {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.02em;
}

.toc-desc {
    display: block;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--muted);
    padding-left: 0.65rem;
    border-left: 3px solid rgba(34, 197, 94, 0.35);
}

.badge {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid rgba(34, 197, 94, 0.35);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(1.75rem, 5vw, 2.35rem);
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 1rem;
}

.lead {
    color: var(--muted);
    font-size: 1.05rem;
    margin: 1rem auto 0;
    max-width: 34em;
    text-align: left;
    line-height: 1.65;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.75rem;
    margin-top: 2rem;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

.card h2 {
    font-size: 1.15rem;
    margin: 0 0 1rem;
}

.list {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--muted);
}

.list li {
    margin-bottom: 0.5rem;
}

.form-section {
    margin-top: 2rem;
}

.form-section h2 {
    font-size: 1.25rem;
    margin: 0 0 0.5rem;
}

.form-hint {
    color: var(--muted);
    font-size: 0.95rem;
    margin: 0 0 1.25rem;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

@media (min-width: 520px) {
    .form-row {
        flex-direction: row;
        align-items: stretch;
    }
}

input[type="email"] {
    flex: 1;
    padding: 0.9rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font: inherit;
}

input[type="email"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}

button[type="submit"] {
    padding: 0.9rem 1.5rem;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dim));
    color: #041109;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}

button[type="submit"]:hover {
    filter: brightness(1.05);
}

button[type="submit"]:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    filter: grayscale(0.15);
}

button[type="submit"]:disabled:hover {
    filter: grayscale(0.15);
}

.hp {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    width: 0;
}

.alert {
    padding: 0.85rem 1rem;
    border-radius: 10px;
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
}

.alert.ok {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.35);
    color: #86efac;
}

.alert.err {
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.35);
    color: #fecaca;
}

.tiny {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--muted);
}

footer {
    margin-top: 3rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--muted);
}

.policy-back {
    margin: 0 0 1rem;
    font-size: 0.95rem;
}

.policy-lead {
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

.policy-meta {
    margin: 0 0 1.25rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.policy-doc h2 {
    font-size: 1.1rem;
    margin: 1.65rem 0 0.5rem;
    color: var(--text);
}

.policy-doc h2:first-of-type {
    margin-top: 0;
}

.policy-doc h3 {
    font-size: 1rem;
    margin: 1.15rem 0 0.35rem;
    color: var(--text);
}

.policy-doc p {
    margin: 0.55rem 0 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.policy-doc ul {
    margin: 0.45rem 0 0;
    padding-left: 1.25rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.policy-doc li + li {
    margin-top: 0.35rem;
}

.policy-doc strong {
    color: var(--text);
}