.customer-mail-layout {
    display: grid;
    grid-template-columns: minmax(320px, 1fr) minmax(360px, 1fr);
    gap: 24px;
}

.customer-mail-card {
    background: var(--panel-bg, #fff);
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 18px;
    padding: 24px;
}

.customer-mail-card h2 {
    margin-top: 0;
}

.customer-mail-form {
    display: grid;
    gap: 16px;
}

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

.customer-mail-field label {
    font-weight: 600;
}

.customer-mail-field input,
.customer-mail-field textarea {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid rgba(148, 163, 184, 0.45);
    border-radius: 10px;
    padding: 11px 12px;
    font: inherit;
    background: transparent;
    color: inherit;
}

.customer-mail-field textarea {
    min-height: 220px;
    resize: vertical;
}

.customer-mail-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.customer-mail-status {
    min-height: 24px;
    margin-top: 12px;
}

.customer-mail-status[data-type="success"] {
    color: #15803d;
}

.customer-mail-status[data-type="error"] {
    color: #b91c1c;
}

.customer-mail-sent-list {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}

.customer-mail-message {
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 12px;
    padding: 14px;
}

.customer-mail-message-top {
    display: flex;
    justify-content: space-between;
    gap: 16px;
}

.customer-mail-message-top span,
.customer-mail-recipient,
.customer-mail-message-status {
    opacity: 0.75;
    font-size: 0.9rem;
}

.customer-mail-recipient,
.customer-mail-message-status {
    margin-top: 6px;
}

.customer-mail-empty {
    opacity: 0.7;
    padding: 20px 0;
}

@media (max-width: 900px) {
    .customer-mail-layout {
        grid-template-columns: 1fr;
    }
}

#customerMailView {
    display: none;
}

#customerMailView.active {
    display: block;
}

.customer-mail-page-header {
    margin-bottom: 24px;
}

.customer-mail-page-header h1 {
    margin-bottom: 6px;
}

.customer-mail-page-header p {
    margin: 0;
    opacity: 0.72;
}

.customer-mail-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.customer-mail-card-header h2 {
    margin-bottom: 4px;
}

.customer-mail-card-header p {
    margin: 0;
    opacity: 0.7;
}

/* HFS mail – dark theme fix */
.customer-mail-card {
    background: #0f1b2d;
    color: #f8fafc;
    border-color: rgba(148, 163, 184, 0.22);
}

.customer-mail-card h2,
.customer-mail-card label,
.customer-mail-card strong,
.customer-mail-page-header h1 {
    color: #f8fafc;
}

.customer-mail-card p,
.customer-mail-recipient,
.customer-mail-message-status,
.customer-mail-message-top span {
    color: #94a3b8;
    opacity: 1;
}

.customer-mail-field input,
.customer-mail-field textarea {
    background: #172437;
    color: #f8fafc;
    border-color: #334155;
}

.customer-mail-field input::placeholder,
.customer-mail-field textarea::placeholder {
    color: #94a3b8;
}

.customer-mail-message {
    background: #111f32;
    border-color: #2b3b52;
}

.customer-mail-empty {
    color: #94a3b8;
}

#refreshCustomerMailBtn {
    color: #f8fafc;
}

.customer-mail-inbox-card {
    margin-bottom: 24px;
}

.customer-mail-inbox-layout {
    display: grid;
    grid-template-columns: minmax(280px, 360px) 1fr;
    gap: 18px;
    margin-top: 18px;
    min-height: 360px;
}

.customer-mail-inbox-list {
    display: grid;
    align-content: start;
    gap: 8px;
}

.customer-inbox-item {
    display: grid;
    gap: 5px;
    width: 100%;
    padding: 13px 14px;
    border: 1px solid #2b3b52;
    border-radius: 10px;
    background: #111f32;
    color: #f8fafc;
    text-align: left;
    cursor: pointer;
}

.customer-inbox-item:hover,
.customer-inbox-item.active {
    background: #172a42;
    border-color: #3b82f6;
}

.customer-inbox-item.unread {
    border-left: 4px solid #3b82f6;
}

.customer-inbox-item span,
.customer-inbox-item small {
    color: #94a3b8;
}

.customer-mail-reader {
    background: #111f32;
    border: 1px solid #2b3b52;
    border-radius: 12px;
    padding: 20px;
    color: #f8fafc;
}

.customer-mail-reader h3 {
    margin-top: 0;
    font-size: 1.25rem;
}

.customer-mail-reader-meta {
    display: grid;
    gap: 6px;
    padding-bottom: 16px;
    margin-bottom: 18px;
    border-bottom: 1px solid #2b3b52;
    color: #cbd5e1;
}

.customer-mail-reader-body {
    margin: 0;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    font: inherit;
    line-height: 1.6;
    color: #e2e8f0;
}

.customer-mail-reader-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    border: 1px dashed #334155;
    border-radius: 12px;
    color: #94a3b8;
}

@media (max-width: 900px) {
    .customer-mail-inbox-layout {
        grid-template-columns: 1fr;
    }
}

.customer-mail-reader-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 18px;
}

.customer-mail-delete {
    margin-left: auto;
    border-color: rgba(239, 68, 68, 0.55);
    color: #fca5a5;
}

.customer-mail-delete:hover {
    background: rgba(239, 68, 68, 0.12);
    border-color: #ef4444;
}