/* ════════════════════════════════════════════════════════════
   Founder section — open-letter layout
   ════════════════════════════════════════════════════════════ */
.cf-sec {
    position: relative;
    padding: 110px 0 120px;
    overflow: hidden;
    background: #f5f4f0;
    color: #1a1a1a;
}
.cf-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 50% 40% at 12% 0%, rgba(232, 52, 122, 0.06), transparent 60%),
        radial-gradient(ellipse 60% 40% at 88% 100%, rgba(205, 160, 127, 0.10), transparent 70%);
}
.cf-vline {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: rgba(205, 160, 127, 0.5);
}
.cf-vline-l { left: 16px; }
.cf-vline-r { right: 16px; }

.cf-shell {
    position: relative;
    z-index: 1;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}
@media (min-width: 768px)  { .cf-shell { padding: 0 48px; } }
@media (min-width: 1024px) { .cf-shell { padding: 0 64px; } }

/* ─── Header ─── */
.cf-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    margin-bottom: 56px;
}
.cf-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 7px 14px;
    border-radius: 999px;
    background: rgba(232, 52, 122, 0.1);
    border: 1px solid rgba(232, 52, 122, 0.28);
    font-size: 11px; font-weight: 700;
    letter-spacing: 0.18em; text-transform: uppercase;
    color: #b91c5c;
    width: fit-content;
}
.cf-eyebrow-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: #e8347a;
    box-shadow: 0 0 0 0 rgba(232, 52, 122, 0.7);
    animation: cfPing 1.8s ease-out infinite;
}
@keyframes cfPing {
    0%   { box-shadow: 0 0 0 0 rgba(232, 52, 122, 0.55); }
    70%  { box-shadow: 0 0 0 10px rgba(232, 52, 122, 0); }
    100% { box-shadow: 0 0 0 0 rgba(232, 52, 122, 0); }
}
.cf-title {
    font-size: clamp(38px, 5.4vw, 64px);
    font-weight: 500;
    line-height: 1.05;
    letter-spacing: -0.025em;
    color: #1a1a1a;
    margin: 0;
}
.cf-title em {
    font-style: italic;
    font-weight: 400;
    font-family: "PlayfairDisplay", "Times New Roman", serif;
    background: linear-gradient(135deg, #e8347a 0%, #cda07f 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ─── The letter ─── */
.cf-letter {
    position: relative;
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    background: #fff;
    border: 1px solid rgba(205, 160, 127, 0.28);
    border-radius: 28px;
    padding: 36px 28px;
    box-shadow: 0 30px 70px -32px rgba(42, 42, 42, 0.22);
}
@media (min-width: 768px) {
    .cf-letter {
        grid-template-columns: 200px 1fr;
        gap: 48px;
        padding: 56px 56px;
    }
}

.cf-letter-author {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
}
@media (min-width: 768px) {
    .cf-letter-author { align-items: flex-start; text-align: left; gap: 8px; }
}
.cf-letter-photo {
    width: 136px;
    height: 136px;
    border-radius: 50%;
    overflow: hidden;
    background: #f5f4f0;
    box-shadow: 0 18px 38px -16px rgba(232, 52, 122, 0.32);
    margin-bottom: 8px;
}
@media (min-width: 768px) {
    .cf-letter-photo { width: 168px; height: 168px; }
}
.cf-letter-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cf-letter-name {
    font-size: 16px;
    font-weight: 700;
    color: #1a1a1a;
    letter-spacing: -0.01em;
}
.cf-letter-role {
    font-size: 13px;
    color: rgba(42, 42, 42, 0.55);
    font-weight: 400;
}

.cf-letter-body {
    position: relative;
    font-family: "PlayfairDisplay", "Times New Roman", serif;
}
.cf-quote-mark {
    position: absolute;
    top: -28px;
    left: -10px;
    font-family: "PlayfairDisplay", "Times New Roman", serif;
    font-size: 92px;
    line-height: 1;
    color: rgba(232, 52, 122, 0.18);
    pointer-events: none;
    user-select: none;
}
.cf-letter-body p {
    margin: 0 0 18px;
    font-size: 18px;
    line-height: 1.65;
    color: rgba(42, 42, 42, 0.88);
    font-weight: 400;
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
@media (min-width: 768px) {
    .cf-letter-body p { font-size: 19px; }
}
.cf-letter-body p strong { color: #1a1a1a; font-weight: 600; }
.cf-letter-body p em { font-style: italic; color: #b91c5c; }
.cf-lead {
    font-size: 21px !important;
    line-height: 1.5 !important;
    color: #1a1a1a !important;
    letter-spacing: -0.005em;
    font-weight: 400 !important;
}
@media (min-width: 768px) {
    .cf-lead { font-size: 24px !important; }
}

/* Signature */
.cf-signature {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px dashed rgba(205, 160, 127, 0.45);
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.cf-signature-script {
    font-family: "PlayfairDisplay", "Times New Roman", serif;
    font-style: italic;
    font-size: 32px;
    line-height: 1;
    background: linear-gradient(135deg, #e8347a 0%, #cda07f 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.cf-signature-meta {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 11.5px;
    color: rgba(42, 42, 42, 0.5);
}
.cf-signature-tick { color: #15803d; font-weight: 600; }

/* Promise card */
.cf-promise {
    margin-top: 24px;
    padding: 20px 22px 22px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(232, 52, 122, 0.06) 0%, rgba(205, 160, 127, 0.10) 100%);
    border: 1px solid rgba(232, 52, 122, 0.22);
    position: relative;
}
.cf-promise-tag {
    display: inline-block;
    margin-bottom: 6px;
    padding: 3px 10px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid rgba(232, 52, 122, 0.3);
    color: #b91c5c;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}
.cf-promise p {
    margin: 0 !important;
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
    font-size: 15px !important;
    line-height: 1.5 !important;
    color: #1a1a1a !important;
    font-weight: 400 !important;
}
.cf-promise p strong { color: #b91c5c; font-weight: 700; }

/* CTA row */
.cf-cta-row {
    margin-top: 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.cf-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 15px 26px;
    border-radius: 999px;
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.005em;
    text-decoration: none;
    transition: all 0.22s ease;
    box-shadow: 0 18px 38px -16px rgba(232, 52, 122, 0.32);
}
.cf-cta-btn svg { width: 16px; height: 16px; transition: transform 0.22s; }
.cf-cta-btn:hover {
    background: linear-gradient(135deg, #e8347a 0%, #cda07f 100%);
    transform: translateY(-2px);
    box-shadow: 0 22px 44px -14px rgba(232, 52, 122, 0.55);
}
.cf-cta-btn:hover svg { transform: translateX(4px); }
.cf-cta-note {
    font-size: 12.5px;
    color: rgba(42, 42, 42, 0.55);
    font-style: italic;
}

/* Mobile */
@media (max-width: 640px) {
    .cf-sec { padding: 80px 0 90px; }
    .cf-letter { padding: 40px 24px; }
    .cf-letter-body p { font-size: 16.5px; }
    .cf-lead { font-size: 18px !important; }
}