.guestbook-section {
    position: relative;
}

.guestbook-shell {
    display: grid;
    grid-template-columns: minmax(0, 0.86fr) minmax(300px, 0.52fr);
    gap: 18px;
    align-items: start;
}

.guestbook-intro {
    display: grid;
    gap: 18px;
}

.guestbook-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.guestbook-card,
.guestbook-empty,
.guestbook-form-card {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.52);
    border-radius: 24px;
    box-shadow: 0 18px 42px rgba(77, 52, 29, 0.08);
}

.guestbook-card {
    display: grid;
    gap: 14px;
    min-height: 168px;
    padding: 18px;
}

.guestbook-card-head {
    display: flex;
    align-items: center;
    gap: 12px;
}

.guestbook-avatar {
    width: 42px;
    height: 42px;
    border-radius: 999px;
    display: inline-grid;
    place-items: center;
    flex: 0 0 auto;
    background: #1f1914;
    color: #fffaf5;
    font-family: "Cormorant Garamond", "Noto Serif SC", serif;
    font-size: 1.34rem;
    font-weight: 700;
}

.guestbook-card strong,
.guestbook-empty strong,
.guestbook-form-card strong {
    display: block;
    color: var(--text, var(--ink));
}

.guestbook-card time,
.guestbook-empty span,
.guestbook-note,
.guestbook-status {
    color: var(--muted);
    font-size: 0.86rem;
}

.guestbook-card p {
    margin: 0;
    color: var(--text, var(--ink));
    line-height: 1.7;
    overflow-wrap: anywhere;
}

.guestbook-empty {
    min-height: 168px;
    display: grid;
    align-content: center;
    gap: 8px;
    padding: 22px;
}

.guestbook-form-card {
    position: sticky;
    top: 92px;
    padding: 20px;
}

.guestbook-form-card form {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.guestbook-field {
    display: grid;
    gap: 7px;
}

.guestbook-field span {
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 800;
}

.guestbook-field input,
.guestbook-field textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255, 250, 245, 0.78);
    color: var(--text, var(--ink));
    font: inherit;
    line-height: 1.5;
    padding: 12px 13px;
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.guestbook-field textarea {
    min-height: 132px;
    resize: vertical;
}

.guestbook-field input:focus,
.guestbook-field textarea:focus {
    border-color: var(--accent, var(--green));
    background: rgba(255, 250, 245, 0.96);
    box-shadow: 0 0 0 4px rgba(128, 83, 63, 0.1);
}

.guestbook-field input:disabled,
.guestbook-field textarea:disabled {
    cursor: not-allowed;
    opacity: 0.62;
}

.guestbook-submit {
    border: 0;
    border-radius: 999px;
    background: var(--text, var(--ink));
    color: #fffaf5;
    cursor: pointer;
    font: inherit;
    font-weight: 800;
    padding: 12px 16px;
    transition: transform 160ms ease, opacity 160ms ease, box-shadow 160ms ease;
}

.guestbook-submit:hover,
.guestbook-submit:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 18px 38px rgba(77, 52, 29, 0.14);
}

.guestbook-submit:disabled {
    cursor: not-allowed;
    opacity: 0.58;
    transform: none;
    box-shadow: none;
}

.guestbook-note {
    margin: 0;
    line-height: 1.55;
}

.guestbook-status {
    min-height: 1.4em;
    margin: 0;
}

.guestbook-status[data-tone="success"] {
    color: #4f714b;
}

.guestbook-status[data-tone="error"] {
    color: #9b4f43;
}

@media (max-width: 980px) {
    .guestbook-shell,
    .guestbook-list {
        grid-template-columns: 1fr;
    }

    .guestbook-form-card {
        position: static;
    }
}

@media (max-width: 520px) {
    .guestbook-card,
    .guestbook-empty,
    .guestbook-form-card {
        border-radius: 20px;
        padding: 16px;
    }

    .guestbook-card {
        min-height: auto;
    }
}