/* ── 사이드바 본체 ───────────────────────────────────────────────────── */

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-w);
    z-index: 200;
    display: flex;
    flex-direction: column;
    background: rgba(7, 12, 28, 0.92);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border-right: 1px solid rgba(0, 212, 255, 0.08);
    box-shadow: 4px 0 40px rgba(0, 0, 0, 0.5), 1px 0 0 rgba(0, 212, 255, 0.05);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}

/* ── 브랜드 섹션 ─────────────────────────────────────────────────────── */

.sidebar__brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 16px;
    flex-shrink: 0;
}

.sidebar__logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow:
        0 0 0 1px rgba(0, 212, 255, 0.2),
        0 0 12px rgba(0, 212, 255, 0.15),
        0 4px 12px rgba(0, 0, 0, 0.4);
}

.sidebar__brand-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.sidebar__brand-name {
    margin: 0;
    font-family: 'Space Grotesk', 'Manrope', sans-serif;
    font-weight: 700;
    font-size: 15px;
    color: var(--text-bright);
    letter-spacing: 0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar__brand-sub {
    margin: 0;
    font-size: 9px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--neon-cyan);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── 구분선 ──────────────────────────────────────────────────────────── */

.sidebar__divider {
    height: 1px;
    background: var(--line, rgba(255, 255, 255, 0.1));
    margin: 8px 0;
    flex-shrink: 0;
}

/* ── 네비게이션 ──────────────────────────────────────────────────────── */

.sidebar__nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 4px 0;
    /* 스크롤바 숨김 */
    scrollbar-width: none;
}

.sidebar__nav::-webkit-scrollbar {
    display: none;
}

.sidebar__section-label {
    margin: 0;
    padding: 8px 24px 4px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-muted);
}

/* ── 네비게이션 아이템 ───────────────────────────────────────────────── */

.sidebar__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm, 12px);
    margin: 2px 10px;
    text-decoration: none;
    color: var(--text-dim);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-body, 'Manrope', sans-serif);
    border: 1px solid transparent;
    position: relative;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    overflow: hidden;
}

.sidebar__item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text, #f0ebe4);
    border-color: rgba(255, 255, 255, 0.08);
}

/* 활성 아이템 */
.sidebar__item.is-active {
    background: linear-gradient(90deg, rgba(0, 212, 255, 0.12) 0%, rgba(0, 212, 255, 0.04) 100%);
    border-color: rgba(0, 212, 255, 0.2);
    color: var(--text-bright);
}

/* 활성 아이템 좌측 네온 바 */
.sidebar__item.is-active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    bottom: 20%;
    width: 2px;
    background: var(--neon-cyan);
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 8px var(--neon-cyan), 0 0 16px rgba(0, 212, 255, 0.4);
}

/* ── 아이콘 ──────────────────────────────────────────────────────────── */

.sidebar__item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: inherit;
    transition: color 0.2s ease;
}

.sidebar__item.is-active .sidebar__item-icon {
    color: var(--neon-cyan);
}

/* ── 라벨 ────────────────────────────────────────────────────────────── */

.sidebar__item-label {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── 도트 인디케이터 ─────────────────────────────────────────────────── */

.sidebar__item-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--neon-cyan);
    box-shadow: 0 0 6px var(--neon-cyan);
    flex-shrink: 0;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.sidebar__item.is-active .sidebar__item-dot {
    opacity: 1;
}

/* ── 사이드바 푸터 ───────────────────────────────────────────────────── */

.sidebar__footer {
    flex-shrink: 0;
    margin-top: auto;
}

.sidebar__footer-content {
    padding: 12px 16px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar__status {
    display: flex;
    align-items: center;
    gap: 7px;
}

.sidebar__status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #34d399;
    box-shadow: 0 0 6px rgba(52, 211, 153, 0.8), 0 0 12px rgba(52, 211, 153, 0.4);
    flex-shrink: 0;
    animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 6px rgba(52, 211, 153, 0.8), 0 0 12px rgba(52, 211, 153, 0.4); }
    50% { opacity: 0.7; box-shadow: 0 0 3px rgba(52, 211, 153, 0.5), 0 0 6px rgba(52, 211, 153, 0.2); }
}

.sidebar__status-text {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.sidebar__version {
    margin: 0;
    font-size: 10px;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    letter-spacing: 0.05em;
    opacity: 0.6;
}

/* ── 모바일 토글 버튼 ────────────────────────────────────────────────── */

.sidebar-toggle {
    display: none;
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 201;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(7, 12, 28, 0.88);
    backdrop-filter: blur(12px) saturate(1.4);
    -webkit-backdrop-filter: blur(12px) saturate(1.4);
    cursor: pointer;
    padding: 0;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.sidebar-toggle:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.25);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.4), 0 0 8px rgba(0, 212, 255, 0.15);
}

.sidebar-toggle__icon {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 18px;
    height: 18px;
}

.sidebar-toggle__icon span {
    display: block;
    width: 16px;
    height: 1.5px;
    background: var(--text-bright, #ffffff);
    border-radius: 2px;
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.28s ease,
        width 0.28s ease;
    transform-origin: center;
}

.sidebar-toggle__icon.is-open span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}

.sidebar-toggle__icon.is-open span:nth-child(2) {
    opacity: 0;
    width: 0;
}

.sidebar-toggle__icon.is-open span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}

/* ── 오버레이 ────────────────────────────────────────────────────────── */

.sidebar__overlay {
    position: fixed;
    inset: 0;
    z-index: 199;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar__overlay.is-visible {
    opacity: 1;
    pointer-events: auto;
}

/* ── 모바일 반응형 ───────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
}