/* =========================================================================
   Chat Share Modal — minimalistic, modern, clean
   ========================================================================= */

.cs-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1100;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    padding: 16px;
}

.cs-overlay[hidden] {
    display: none !important;
}

.cs-overlay.cs-active {
    opacity: 1;
    visibility: visible;
}

.cs-modal {
    width: 100%;
    max-width: 520px;
    max-height: calc(100vh - 32px);
    background: var(--background-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18), 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: scale(0.97) translateY(8px);
    opacity: 0;
    transition: transform 0.2s ease, opacity 0.2s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.cs-overlay.cs-active .cs-modal {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.cs-modal.cs-busy {
    cursor: progress;
}

.cs-modal.cs-busy .cs-body,
.cs-modal.cs-busy .cs-footer {
    pointer-events: none;
}

/* ----- Header ----- */

.cs-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 22px 14px;
    border-bottom: 1px solid var(--border-color);
}

.cs-header-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.cs-title {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: -0.01em;
}

.cs-subtitle {
    margin: 0;
    font-size: 13px;
    color: var(--text-color-tertiary);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cs-icon-btn {
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: transparent;
    border: none;
    color: var(--text-color-tertiary);
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

@media (hover: hover) and (pointer: fine) {
    .cs-icon-btn:hover {
        background: var(--hover);
        color: var(--text-color);
    }
}

/* ----- Body ----- */

.cs-body {
    padding: 18px 22px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    overflow-y: auto;
    flex: 1;
}

.cs-section,
.cs-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cs-section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.cs-section-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-color-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ----- Empty state ----- */

.cs-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
    padding: 28px 16px 8px;
}

.cs-empty-icon {
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--hover);
    color: var(--text-color-secondary);
    margin-bottom: 6px;
}

.cs-empty-title {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
}

.cs-empty-desc {
    margin: 0;
    font-size: 13px;
    color: var(--text-color-tertiary);
    line-height: 1.45;
}

/* ----- Link card list ----- */

.cs-link-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.cs-link-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--background-color);
    transition: border-color 0.15s ease;
}

@media (hover: hover) and (pointer: fine) {
    .cs-link-card:hover {
        border-color: color-mix(in srgb, var(--text-color) 18%, var(--border-color));
    }
}

.cs-link-card-expired {
    border-color: color-mix(in srgb, var(--red, #dc2626) 35%, var(--border-color));
    background: color-mix(in srgb, var(--red, #dc2626) 4%, var(--background-color));
}

.cs-link-url-row {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--hover);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 4px 4px 4px 10px;
}

.cs-link-url {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    padding: 6px 0;
    font-size: 13px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    color: var(--text-color);
    outline: none;
    text-overflow: ellipsis;
}

.cs-link-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.cs-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-color-secondary);
    background: var(--hover);
    border: 1px solid transparent;
    line-height: 1.4;
    white-space: nowrap;
}

.cs-chip svg {
    flex-shrink: 0;
}

.cs-chip-muted {
    color: var(--text-color-tertiary);
    background: transparent;
    border-color: var(--border-color);
}

.cs-chip-danger {
    color: var(--red, #dc2626);
    background: color-mix(in srgb, var(--red, #dc2626) 12%, transparent);
}

.cs-link-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 2px;
    padding-top: 2px;
}

/* ----- Hidden attribute safety for flex children ----- */

.cs-section[hidden],
.cs-form[hidden],
.cs-empty[hidden],
.cs-link-list[hidden] {
    display: none !important;
}

/* ----- Form fields ----- */

.cs-field[hidden] {
    display: none !important;
}

.cs-field-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
}

.cs-radio-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cs-radio {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--background-color);
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

@media (hover: hover) and (pointer: fine) {
    .cs-radio:hover {
        border-color: color-mix(in srgb, var(--text-color) 25%, var(--border-color));
    }
}

.cs-radio input[type='radio'] {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    border: 1.5px solid var(--border-color);
    border-radius: 50%;
    background: var(--background-color);
    cursor: pointer;
    position: relative;
    transition: border-color 0.15s ease;
}

.cs-radio input[type='radio']:checked {
    border-color: var(--primary-color);
}

.cs-radio input[type='radio']:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    transform: translate(-50%, -50%);
}

.cs-radio:has(input[type='radio']:checked) {
    border-color: var(--primary-color);
    background: color-mix(in srgb, var(--primary-color) 6%, var(--background-color));
}

.cs-radio-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.cs-radio-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-color);
    line-height: 1.3;
}

.cs-radio-desc {
    font-size: 12px;
    color: var(--text-color-tertiary);
    line-height: 1.35;
}

/* ----- Toggle row + content ----- */

.cs-toggle-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--background-color);
    transition: border-color 0.15s ease;
}

.cs-toggle-row:has(input:checked) {
    border-color: color-mix(in srgb, var(--primary-color) 50%, var(--border-color));
    background: color-mix(in srgb, var(--primary-color) 4%, var(--background-color));
}

.cs-toggle-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.cs-toggle-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-color);
    line-height: 1.3;
}

.cs-toggle-desc {
    font-size: 12px;
    color: var(--text-color-tertiary);
    line-height: 1.4;
}

.cs-switch {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
    flex-shrink: 0;
}

.cs-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.cs-switch-slider {
    position: absolute;
    inset: 0;
    cursor: pointer;
    background: var(--border-color);
    border-radius: 999px;
    transition: background 0.18s ease;
}

.cs-switch-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    transition: transform 0.18s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
}

.cs-switch input:checked + .cs-switch-slider {
    background: var(--primary-color);
}

.cs-switch input:checked + .cs-switch-slider::before {
    transform: translateX(16px);
}

.cs-switch input:focus-visible + .cs-switch-slider {
    outline: 2px solid color-mix(in srgb, var(--primary-color) 60%, transparent);
    outline-offset: 2px;
}

.cs-switch input:disabled + .cs-switch-slider {
    opacity: 0.55;
    cursor: not-allowed;
}

.cs-toggle-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 10px 14px 0;
}

.cs-toggle-content[hidden] {
    display: none;
}

.cs-input {
    width: 100%;
    padding: 10px 12px;
    font-size: 13px;
    font-family: inherit;
    color: var(--text-color);
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    box-sizing: border-box;
}

.cs-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 18%, transparent);
}

.cs-input:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.cs-helper {
    margin: 0;
    font-size: 11.5px;
    color: var(--text-color-tertiary);
    line-height: 1.4;
}

.cs-field-error {
    margin: 0;
    font-size: 12px;
    color: var(--red, #dc2626);
    line-height: 1.4;
}

.cs-input-error {
    border-color: var(--red, #dc2626) !important;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--red, #dc2626) 18%, transparent) !important;
}

/* ----- Invite users ----- */

.cs-invite-field {
    gap: 10px;
}

.cs-invite-search {
    position: relative;
}

.cs-invite-search svg {
    position: absolute;
    left: 12px;
    top: 50%;
    width: 15px;
    height: 15px;
    color: var(--text-color-tertiary);
    transform: translateY(-50%);
    pointer-events: none;
}

.cs-invite-search-input {
    padding-left: 34px;
}

.cs-invite-user-list {
    max-height: 210px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--background-color);
}

.cs-invite-state {
    padding: 14px;
    font-size: 12.5px;
    color: var(--text-color-tertiary);
    text-align: center;
}

.cs-invite-user-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 0;
    border-bottom: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-color);
    font-family: inherit;
    text-align: left;
    cursor: pointer;
}

.cs-invite-user-item:last-child {
    border-bottom: 0;
}

@media (hover: hover) and (pointer: fine) {
    .cs-invite-user-item:hover {
        background: var(--hover);
    }
}

.cs-invite-user-item.is-selected {
    background: color-mix(in srgb, var(--primary-color) 8%, var(--background-color));
}

.cs-invite-avatar {
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--hover);
    color: var(--text-color-secondary);
    font-size: 11px;
    font-weight: 700;
}

.cs-invite-user-info {
    min-width: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.cs-invite-user-name,
.cs-invite-user-username {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cs-invite-user-name {
    font-size: 13px;
    font-weight: 600;
}

.cs-invite-user-username {
    font-size: 12px;
    color: var(--text-color-tertiary);
}

.cs-invite-check {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--primary-color);
    opacity: 0;
}

.cs-invite-user-item.is-selected .cs-invite-check {
    opacity: 1;
}

.cs-invite-selected {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cs-invite-selected[hidden] {
    display: none;
}

.cs-invite-selected-head {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-color-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.cs-invite-selected-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.cs-invite-selected-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    max-width: 100%;
    padding: 4px 7px;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: var(--hover);
    font-size: 12px;
    color: var(--text-color-secondary);
}

.cs-invite-selected-chip span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cs-invite-selected-chip button {
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: currentColor;
    cursor: pointer;
}

.cs-invite-selected-chip svg {
    width: 12px;
    height: 12px;
}

/* ----- Notice ----- */

.cs-notice {
    margin: 0;
    padding: 10px 12px;
    font-size: 12.5px;
    border-radius: 8px;
    border: 1px solid transparent;
    line-height: 1.4;
}

.cs-notice[aria-hidden="true"] {
    display: none;
}

.cs-notice-info {
    color: var(--text-color-secondary);
    background: var(--hover);
}

.cs-notice-error {
    color: var(--red, #dc2626);
    background: color-mix(in srgb, var(--red, #dc2626) 10%, transparent);
    border-color: color-mix(in srgb, var(--red, #dc2626) 35%, transparent);
}

/* ----- Footer ----- */

.cs-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 14px 22px 18px;
    border-top: 1px solid var(--border-color);
    background: var(--background-color);
}

.cs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
    line-height: 1.2;
    min-height: 36px;
}

.cs-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.cs-btn-primary {
    color: #fff;
    background: var(--primary-color);
}

@media (hover: hover) and (pointer: fine) {
    .cs-btn-primary:hover:not(:disabled) {
        background: color-mix(in srgb, black 8%, var(--primary-color));
    }
}

.cs-btn-ghost {
    color: var(--text-color-secondary);
    background: transparent;
    border-color: var(--border-color);
}

@media (hover: hover) and (pointer: fine) {
    .cs-btn-ghost:hover:not(:disabled) {
        background: var(--hover);
        color: var(--text-color);
        border-color: color-mix(in srgb, var(--text-color) 22%, var(--border-color));
    }
}

/* ----- Responsive ----- */

@media (max-width: 640px) {
    .cs-overlay {
        padding: 0;
        align-items: flex-end;
    }

    .cs-modal {
        max-width: 100%;
        max-height: 92vh;
        border-radius: 18px 18px 0 0;
        transform: translateY(20px);
    }

    .cs-overlay.cs-active .cs-modal {
        transform: translateY(0);
    }

    .cs-header {
        padding: 18px 18px 12px;
    }

    .cs-body {
        padding: 16px 18px;
    }

    .cs-footer {
        padding: 12px 18px 16px;
        flex-direction: column-reverse;
    }

    .cs-footer .cs-btn {
        width: 100%;
    }

    .cs-link-actions {
        flex-wrap: wrap;
    }
}