/* Internship experience letter — self-contained formal document */
.cert-letter {
    --letter-navy: #0c2d6b;
    --letter-ink: #1a2332;
    --letter-muted: #5a6578;
    --letter-border: #d8dee9;
    --letter-serif: Georgia, "Times New Roman", Times, serif;
    --letter-sans: "Plus Jakarta Sans", system-ui, -apple-system, Segoe UI, sans-serif;

    box-sizing: border-box;
    width: 100%;
    max-width: 794px;
    margin: 0 auto;
    font-family: var(--letter-sans);
    color: var(--letter-ink);
}

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

.cert-letter__sheet {
    position: relative;
    width: 100%;
    background: #fff;
    color: var(--letter-ink);
    border: 1px solid var(--letter-border);
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.1);
    overflow: hidden;
    text-align: left;
}

.cert-letter__topbar {
    height: 5px;
    background: linear-gradient(90deg, #0c2d6b 0%, #4f46e5 55%, #0891b2 100%);
}

.cert-letter__head {
    display: flex !important;
    flex-direction: row !important;
    align-items: flex-start !important;
    justify-content: space-between !important;
    gap: 1.25rem;
    padding: 1.75rem 2.5rem 1.1rem;
}

.cert-letter__brand-block {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 0.85rem;
    min-width: 0;
}

.cert-letter__logo {
    width: 48px !important;
    height: 48px !important;
    max-width: 48px !important;
    max-height: 48px !important;
    object-fit: contain !important;
    flex-shrink: 0;
}

.cert-letter__brand {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--letter-navy);
    line-height: 1.15;
}

.cert-letter__tagline {
    margin: 0.15rem 0 0;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--letter-muted);
}

.cert-letter__contact {
    text-align: right;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--letter-muted);
    line-height: 1.45;
    flex-shrink: 0;
}

.cert-letter__contact p {
    margin: 0;
}

.cert-letter__head-rule {
    height: 1px;
    margin: 0 2.5rem 1.15rem;
    background: linear-gradient(90deg, var(--letter-navy), rgba(79, 70, 229, 0.35), transparent);
}

.cert-letter__meta-box {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 0.75rem;
    margin: 0 2.5rem 1.35rem;
    padding: 0.85rem 1.65rem;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
}

.cert-letter__meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.cert-letter__meta-item:last-child {
    text-align: right;
    align-items: flex-end;
}

.cert-letter__meta-label {
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #64748b;
}

.cert-letter__meta-value {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--letter-navy);
    word-break: break-word;
}

.cert-letter__content {
    padding: 0 2.5rem 0.5rem;
}

.cert-letter__subject {
    margin: 0 0 1rem;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--letter-navy);
    text-align: center;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e2e8f0;
}

.cert-letter__salutation {
    margin: 0 0 0.85rem;
    font-family: var(--letter-serif);
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--letter-ink);
}

.cert-letter__body {
    display: block;
}

.cert-letter__body p {
    margin: 0 0 0.85rem;
    font-family: var(--letter-serif);
    font-size: 0.92rem;
    line-height: 1.72;
    color: #2d3748;
    text-align: justify;
}

.cert-letter__body p:last-child {
    margin-bottom: 0;
}

.cert-letter__body strong {
    color: var(--letter-navy);
    font-weight: 700;
}

.cert-letter__closing {
    margin: 0.85rem 0 0;
    font-family: var(--letter-serif);
    font-size: 0.92rem;
    line-height: 1.65;
    color: #2d3748;
}

.cert-letter__footer {
    display: flex !important;
    flex-direction: row !important;
    align-items: flex-end !important;
    justify-content: space-between !important;
    gap: 1.25rem;
    margin: 1.5rem 2.5rem 0;
    padding: 0.25rem 0 0;
}

.cert-letter__sign {
    flex: 0 1 auto;
    max-width: 11rem;
}

.cert-letter__sign-for {
    margin: 0 0 0.35rem;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--letter-muted);
}

.cert-letter__sign-img {
    display: block !important;
    width: auto !important;
    height: auto !important;
    max-width: 120px !important;
    max-height: 42px !important;
    object-fit: contain !important;
    margin: 0 0 0.1rem !important;
}

.cert-letter__sign-line {
    display: block;
    width: 9rem;
    max-width: 100%;
    height: 1px;
    background: #64748b;
}

.cert-letter__sign-role {
    margin: 0.35rem 0 0;
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--letter-navy);
}

.cert-letter__sign-org {
    margin: 0.1rem 0 0;
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--letter-muted);
}

.cert-letter__seal {
    flex-shrink: 0;
    width: 68px;
    height: 68px;
    border-radius: 50%;
    border: 2px solid var(--letter-navy);
    display: flex !important;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.48rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--letter-navy);
    line-height: 1.25;
}

.cert-letter__fine-print {
    margin: 1.15rem 2.5rem 1.35rem;
    padding-top: 0.85rem;
    border-top: 1px solid #e2e8f0;
    font-size: 0.62rem;
    font-weight: 600;
    color: #94a3b8;
    text-align: center;
    line-height: 1.4;
}

.cert-letter__sheet--export {
    width: 794px !important;
    max-width: 794px !important;
    box-shadow: none !important;
}

.home-cert-showcase .cert-letter__sheet {
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
}

.home-cert-showcase__frame {
    background: linear-gradient(180deg, #eef2ff 0%, #f8fafc 100%);
    border-radius: 12px;
    padding: 1rem !important;
}

@media (max-width: 640px) {
    .cert-letter__head,
    .cert-letter__content,
    .cert-letter__footer,
    .cert-letter__fine-print {
        padding-left: 1.1rem;
        padding-right: 1.1rem;
    }

    .cert-letter__head {
        flex-direction: column !important;
        padding-top: 1.25rem;
    }

    .cert-letter__contact {
        text-align: left;
    }

    .cert-letter__head-rule,
    .cert-letter__meta-box {
        margin-left: 1.1rem;
        margin-right: 1.1rem;
    }

    .cert-letter__meta-box {
        grid-template-columns: 1fr !important;
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .cert-letter__meta-item:last-child {
        text-align: left;
        align-items: flex-start;
    }

    .cert-letter__footer {
        margin-left: 1.1rem;
        margin-right: 1.1rem;
        flex-direction: column !important;
        align-items: flex-start !important;
    }

    .cert-letter__body p {
        text-align: left;
        font-size: 0.86rem;
    }
}