/* ============================================================
   xPulse Chat – layout.css
   App Shell · Sidebar · Top Bar · Main · Mobile Overlay
   ============================================================ */

/* ── App ── */
#app {
    height: 100dvh;
    min-height: 100dvh;
    animation: fadeIn 0.3s ease both;
}

#app.layout-fullscreen {
    display: flex;
    flex-direction: column;
}

#app.layout-shell {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: 1fr;
    grid-template-areas: "sidebar main";
}

/* ── Sidebar ── */
#sidebar {
    grid-area: sidebar;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    background: var(--bg);
    height: 100dvh;
    overflow: hidden;
    transition: transform 0.25s ease;
}

.sidebar-logo {
    padding: 0.9rem 1.1rem 0.75rem;
    font-family: var(--serif);
    font-size: 1.15rem;
    font-weight: 300;
    color: var(--accent);
    letter-spacing: -0.01em;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-logo-img {
    height: 28px;
    width: auto;
    display: block;
}

.sidebar-logo-brand {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    min-width: 0;
}

.sidebar-logo-name {
    font-family: var(--serif);
    font-size: 1rem;
    font-weight: 300;
    color: var(--text);
    letter-spacing: -0.01em;
    white-space: nowrap;
}
/* "xPulse" gedimmt, "Chat" in accent – analog zur Brand-Konzeption */
.sidebar-logo-name::before {
    content: '';
}

.sidebar-logo-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 18px;
    cursor: pointer;
    padding: 0.1rem;
    line-height: 1;
    transition: color 0.15s;
}
.sidebar-logo-close:hover { color: var(--text); }

.sidebar-peers-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.1rem 0.4rem;
    flex-shrink: 0;
}

.sidebar-section-label {
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.sidebar-btn-add {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-family: var(--mono);
    font-size: 14px;
    width: 22px;
    height: 22px;
    cursor: pointer;
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: border-color 0.15s, color 0.15s;
    flex-shrink: 0;
}
.sidebar-btn-add:hover { border-color: var(--accent); color: var(--accent); }

.sidebar-peers-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.25rem 0.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.sidebar-peers-list::-webkit-scrollbar { width: 3px; }
.sidebar-peers-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.sidebar-peer-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem;
    border-radius: 2px;
    cursor: pointer;
    transition: background 0.15s;
    border: 1px solid transparent;
}
.sidebar-peer-item:hover  { background: var(--surface); border-color: var(--border); }
.sidebar-peer-item.active { background: var(--surface); border-color: var(--accent); }

.sidebar-peer-avatar {
    width: 26px;
    height: 26px;
    border-radius: 2px;
    background: var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    flex-shrink: 0;
    position: relative;
}

.sidebar-peer-login {
    font-size: 12px;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    cursor: pointer;
}

.sidebar-peer-detail {
    display: none;
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 14px;
    cursor: pointer;
    padding: 0 0.15rem;
    line-height: 1;
    flex-shrink: 0;
    transition: color 0.15s;
}
.sidebar-peer-detail:hover { color: var(--accent); }
.sidebar-peer-item:hover .sidebar-peer-detail { display: block; }

/* Touch devices: always show detail button (no hover) */
@media (hover: none) {
    .sidebar-peer-detail { display: block; }
}

.sidebar-peer-chat-badge {
    display: none;
    font-size: 11px;
    line-height: 1;
    flex-shrink: 0;
    opacity: 0.9;
}
.sidebar-peer-chat-badge.active { display: block; }

.sidebar-peers-empty {
    padding: 1rem 0.5rem;
    font-size: 11px;
    color: var(--text-dim);
    text-align: center;
    line-height: 1.8;
}

.sidebar-footer {
    border-top: 1px solid var(--border);
    padding: 0.75rem 1.1rem;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.sidebar-footer-toggle,
.sidebar-footer-collapse {
    display: none;
}

.sidebar-footer-links {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.sidebar-footer-link {
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.15s;
}
.sidebar-footer-link:hover { color: var(--accent); }

.sidebar-footer-version {
    border-top: 1px solid var(--border);
    padding-top: 0.75rem;
}

.sidebar-version-pill {
    display: flex;
    justify-content: center;
}
.sidebar-version-pill a {
    font-size: 10px;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    text-decoration: none;
    border: 1px solid var(--border);
    border-radius: 2px;
    padding: 0.15rem 0.6rem;
    transition: border-color 0.15s, color 0.15s;
}
.sidebar-version-pill a:hover { border-color: var(--accent2); color: var(--accent2); }

/* ── Main ── */
#main {
    grid-area: main;
    display: flex;
    flex-direction: column;
    height: 100dvh;
    overflow: hidden;
    min-width: 0;
}

/* ── Top Bar ── */
#topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.2rem;
    height: var(--topbar-height);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 0.75rem;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
    flex: 1;
}

#btn-hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 18px;
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    flex-shrink: 0;
    transition: color 0.15s;
}
#btn-hamburger:hover { color: var(--text); }

.topbar-title {
    font-size: 13px;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar-status {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 11px;
    color: var(--text-dim);
    flex-shrink: 0;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    position: relative;
}

/* ── Content ── */
#content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* ── Utility ── */
.hidden { display: none !important; }

/* sidebar-peers-empty uses flex when visible */
.sidebar-peers-empty:not(.hidden) { display: flex; flex-direction: column; }
#sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 99;
    animation: fadeIn 0.2s ease both;
}
#sidebar-backdrop.open { display: block; }

/* ── Mobile ── */
@media (max-width: 767px) {
    #app.layout-shell {
        grid-template-columns: 1fr;
        grid-template-areas: "main";
    }

    #sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: var(--sidebar-width);
        height: 100dvh;
        z-index: 100;
        transform: translateX(-100%);
    }
    #sidebar.open { transform: translateX(0); }

    .sidebar-logo-close { display: flex; }
    #btn-hamburger      { display: flex; }

    /* Mobile: Name nur sichtbar wenn Sidebar als Overlay offen */
    #sidebar:not(.open) .sidebar-logo-name { display: none; }

    .sidebar-footer {
        padding: 0.45rem 0.9rem calc(0.45rem + env(safe-area-inset-bottom));
        gap: 0.2rem;
    }

    .sidebar-footer-toggle {
        display: flex;
        width: 100%;
        justify-content: center;
        align-items: center;
        background: none;
        border: 0;
        color: var(--text-dim);
        font-family: var(--mono);
        font-size: 16px;
        line-height: 1;
        padding: 0.2rem 0;
        cursor: pointer;
    }
    .sidebar-footer-toggle:focus-visible,
    .sidebar-footer-collapse:focus-visible {
        outline: 1px solid var(--muted);
        outline-offset: 2px;
    }
    .sidebar-footer[data-expanded="true"] .sidebar-footer-toggle {
        display: none;
    }

    .sidebar-footer-panel {
        display: none;
        flex-direction: column;
        align-items: center;
        gap: 0.45rem;
    }
    .sidebar-footer[data-expanded="true"] .sidebar-footer-panel {
        display: flex;
    }

    .sidebar-footer-links {
        gap: 0;
        row-gap: 0.35rem;
    }
    .sidebar-footer-link + .sidebar-footer-link::before {
        content: "·";
        color: #666;
        margin: 0 0.45rem;
    }

    .sidebar-footer-collapse {
        display: inline-flex;
        background: none;
        border: 0;
        color: var(--text-dim);
        font-family: var(--mono);
        font-size: 16px;
        line-height: 1;
        padding: 0.1rem 0.45rem;
        cursor: pointer;
    }

    .sidebar-footer-version {
        margin-top: 0.2rem;
    }
}

/* ── Info Modal (Desktop, eingeloggt) ── */

.info-modal {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    z-index: 50;
    animation: fadeIn 0.2s ease both;
}

.info-modal.hidden { display: none; }

.info-modal-box {
    position: relative;
    background: var(--bg);
    border-left: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    width: min(420px, 90vw);
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideInRight 0.2s ease both;
}

@keyframes slideInRight {
    from { transform: translateX(32px); opacity: 0; }
    to   { transform: translateX(0);    opacity: 1; }
}

.info-modal-close {
    position: absolute;
    top: 0.75rem;
    right: 0.9rem;
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 16px;
    cursor: pointer;
    padding: 0.2rem;
    line-height: 1;
    z-index: 1;
    transition: color 0.15s;
}
.info-modal-close:hover { color: var(--text); }

#info-modal-content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Mobile: kein Modal – Info geht fullscreen */
@media (max-width: 767px) {
    .info-modal { display: none !important; }
}