.chat-sidebar {
    background: #ffffff;
    border-right: 1px solid rgba(0, 0, 0, 0.06);
    min-height: 100vh;
    min-height: 100dvh;
    min-width: 0;
    overflow: hidden;
}

html[data-theme="dark"] .chat-sidebar {
    background: var(--chat-bg-sidebar);
    border-right-color: var(--chat-border);
}

.chat-sidebar__inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 14px 12px;
    gap: 8px;
    padding-top: calc(14px + var(--chat-safe-top));
}

.chat-sidebar__brand {
    padding: 4px 4px 8px;
}

.chat-sidebar__brand-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.chat-sidebar__logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.04em;
    color: var(--chat-brand);
    padding-inline-start: 4px;
    text-transform: lowercase;
}

.chat-sidebar__mark {
    width: 28px;
    height: 28px;
    border-radius: 9px;
    display: inline-grid;
    place-items: center;
    background: linear-gradient(145deg, #2563eb, #1e40af);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    box-shadow: 0 6px 14px rgba(37, 99, 235, 0.28);
}

.chat-sidebar__brand-actions {
    display: flex;
    align-items: center;
    gap: 2px;
}

.chat-search {
    padding: 0 4px 8px;
}

.chat-search__input {
    width: 100%;
    min-height: 40px;
    border-radius: 12px;
    border: 1px solid var(--chat-border-strong);
    background: var(--chat-bg-elevated);
    color: var(--chat-text);
    padding: 0 12px;
    outline: none;
}

.chat-search__input:focus {
    border-color: var(--chat-accent);
    box-shadow: 0 0 0 3px var(--chat-accent-soft);
}

.chat-nav {
    padding: 0 2px;
}

.chat-nav__list {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.chat-nav__item {
    display: flex;
    align-items: center;
    gap: 11px;
    min-height: 40px;
    padding: 0 12px;
    border-radius: var(--chat-radius-md);
    color: var(--chat-text);
    transition: background var(--chat-transition);
}

.chat-nav__item:hover {
    background: var(--chat-bg-hover);
}

.chat-nav__item.is-active {
    background: var(--chat-bg-elevated);
    box-shadow: var(--chat-shadow-soft);
    font-weight: 600;
}

.chat-nav__icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--chat-text-secondary);
}

.chat-nav__item.is-active .chat-nav__icon {
    color: var(--chat-accent);
}

.chat-nav__label {
    font-size: 14px;
}

.chat-sidebar__scroll {
    flex: 1;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 10px 4px 8px 2px;
    min-height: 0;
    -webkit-overflow-scrolling: touch;
}


.chat-section + .chat-section {
    margin-top: 16px;
}

.chat-section.is-collapsed .chat-section__list {
    display: none;
}

.chat-section__title {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.01em;
    text-transform: none;
    color: var(--chat-text-muted);
    padding: 6px 12px 6px;
}

.chat-section__title--toggle {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    text-align: start;
    cursor: pointer;
}

.chat-section__title--toggle .ui-icon {
    color: var(--chat-text-muted);
    transition: transform 180ms ease;
}

.chat-section.is-collapsed .chat-section__title--toggle .ui-icon {
    transform: rotate(-90deg);
}

.chat-section__list {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.chat-section__empty {
    padding: 10px 12px;
    color: var(--chat-text-muted);
    font-size: 13px;
}

.chat-conv {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    min-height: 36px;
    border-radius: 10px;
    transition: background 120ms ease;
}

.chat-conv:hover,
.chat-conv.is-active,
.chat-conv.is-menu-open {
    background: var(--chat-bg-hover);
}

.chat-conv__main {
    display: grid;
    grid-template-columns: 18px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    min-height: 36px;
    padding: 0 4px 0 10px;
    min-width: 0;
}

.chat-conv__icon {
    color: var(--chat-text-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.chat-conv__title {
    font-size: 14px;
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: var(--chat-font);
    color: var(--chat-text);
}

.chat-conv__actions {
    display: inline-flex;
    align-items: center;
    gap: 0;
    padding-right: 4px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 120ms ease;
}

.chat-conv:hover .chat-conv__actions,
.chat-conv:focus-within .chat-conv__actions,
.chat-conv.is-menu-open .chat-conv__actions,
.chat-conv.is-active .chat-conv__actions {
    opacity: 1;
    pointer-events: auto;
}

.chat-conv__action {
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: var(--chat-text-secondary);
}

.chat-conv__action:hover {
    background: var(--chat-bg-active, color-mix(in srgb, var(--chat-text) 8%, transparent));
    color: var(--chat-text);
}

.chat-conv__more[aria-expanded="true"] {
    background: var(--chat-bg-active, color-mix(in srgb, var(--chat-text) 8%, transparent));
    color: var(--chat-text);
}

.chat-user {
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px solid var(--chat-border);
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-bottom: var(--chat-safe-bottom);
}

.chat-user__profile {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    text-align: start;
    padding: 8px;
    border-radius: var(--chat-radius-md);
}

.chat-user__profile:hover {
    background: var(--chat-bg-hover);
}

.chat-user__avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, #6366f1, #4338ca);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.chat-user__meta {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.chat-user__name {
    font-size: 13.5px;
    font-weight: 650;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-user__plan {
    font-size: 12px;
    color: var(--chat-text-muted);
}

.chat-user__row {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 8px;
}

.chat-user__theme {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    min-height: 40px;
    border: 1px solid var(--chat-border-strong);
    border-radius: var(--chat-radius-pill);
    background: var(--chat-bg-elevated);
    color: var(--chat-text);
    box-shadow: var(--chat-shadow-soft);
}

.chat-user__theme [data-theme-label] {
    display: none;
}

.chat-user__claim {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    min-height: 40px;
    border: 1px solid var(--chat-border-strong);
    border-radius: var(--chat-radius-pill);
    background: var(--chat-bg-elevated);
    font-size: 13px;
    font-weight: 600;
    color: var(--chat-text);
    box-shadow: var(--chat-shadow-soft);
}

.chat-user__claim:hover,
.chat-user__theme:hover {
    background: var(--chat-bg-hover);
}

@media (max-width: 900px) {
    .chat-conv {
        min-height: 40px;
    }

    .chat-conv__main {
        min-height: 40px;
    }

    .chat-conv__actions {
        opacity: 1;
        pointer-events: auto;
    }

    .chat-conv__action {
        width: 32px;
        height: 32px;
    }
}

/* Floating ChatGPT-style conversation menu (portaled to body) */
.chat-conv-menu {
    position: fixed;
    z-index: 100;
    width: 220px;
    padding: 6px;
    border-radius: 14px;
    background: var(--chat-bg-elevated);
    border: 1px solid var(--chat-border-strong);
    box-shadow:
        0 0 0 1px rgba(15, 23, 42, 0.02),
        0 10px 28px rgba(15, 23, 42, 0.14);
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.chat-conv-menu[hidden] {
    display: none !important;
}

.chat-conv-menu__item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    min-height: 40px;
    padding: 0 12px;
    border-radius: 10px;
    text-align: start;
    font-size: 14px;
    font-weight: 500;
    color: var(--chat-text);
}

.chat-conv-menu__item:hover,
.chat-conv-menu__item:focus-visible {
    background: var(--chat-bg-hover);
    outline: none;
}

.chat-conv-menu__icon {
    width: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--chat-text-secondary);
    flex-shrink: 0;
}

.chat-conv-menu__item.is-danger,
.chat-conv-menu__item.is-danger .chat-conv-menu__icon {
    color: var(--chat-danger, #ef4444);
}

.chat-conv-menu__sep {
    height: 1px;
    margin: 5px 8px;
    background: var(--chat-border);
}