/* ===== Section: Design Tokens & Theme ===== */
:root {
    --bg-body: #121418;
    --bg-nav: #181A1F;
    --bg-panel: #1E2126;
    --bg-input: #282C34;
    --bg-item: #22252B;
    --bg-hover: #323640;
    
    --border-color: #333842;
    --border-focus: #4D7CFE;

    --text-primary: #F0F2F5;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    
    --color-primary: #4D7CFE;
    --color-primary-hover: #3b69ea;
    --color-success: #4CAF50;
    --color-warning: #FFC107;
    --color-danger: #FF5C5C;
    --color-rec: #FF5C5C;
    
    --rec-bar-bg: #181A1F;
    --rec-bar-border: #333842;

    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-sm: 4px;
    --header-height: 64px;
    --sidebar-width: 280px;
    
    --ease-cubic: cubic-bezier(0.215, 0.610, 0.355, 1.000);
}

body.theme-light {
    --bg-body: #F3F4F6;
    --bg-nav: #FFFFFF;
    --bg-panel: #FFFFFF;
    --bg-input: #F9FAFB;
    --bg-item: #F3F4F6;
    --bg-hover: #E5E7EB;
    --border-color: #E5E7EB;
    --text-primary: #111827;
    --text-secondary: #4B5563;
    --text-muted: #9CA3AF;
    
    --rec-bar-bg: #F8F9FA; 
    --rec-bar-border: #E2E8F0;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
}

/* Inputs & UI Elements */
input, select, textarea, button { font-family: inherit; font-size: 0.9rem; }

input[type="text"], input[type="search"], input[type="password"], input[type="number"], input[type="date"], select, textarea {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: border-color 0.2s;
    outline: none;
    width: 100%;
}
select:disabled, input:disabled { opacity: 0.5; cursor: not-allowed; background-color: var(--bg-item); color: var(--text-muted); }
input:focus, select:focus, textarea:focus { border-color: var(--color-primary); }

button {
    cursor: pointer; border: none; background: transparent;
    color: var(--text-secondary); border-radius: var(--radius-sm);
    padding: 8px; transition: all 0.2s;
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    font-weight: 500; white-space: nowrap;
}
button:hover { background-color: var(--bg-hover); color: var(--text-primary); }
button.primary { background-color: var(--color-primary); color: white; }
button.primary:hover { background-color: var(--color-primary-hover); }
button.primary.active { background-color: var(--color-success); }
button.primary.active:hover { background-color: #45a049; }
button.danger { color: var(--color-danger); }
button.danger:hover { background-color: rgba(255, 92, 92, 0.1); }
button.icon-btn { padding: 6px; }

.radio-group { display: flex; gap: 16px; align-items: center; height: 100%; }
.radio-group label { display: flex; align-items: center; gap: 6px; cursor: pointer; margin: 0; color: var(--text-primary); }
.radio-group input[type="radio"] { width: 16px; height: 16px; margin: 0; accent-color: var(--color-primary); }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 10px; }

.icon { width: 1.1em; height: 1.1em; fill: none; stroke: currentColor; stroke-width: 2; vertical-align: middle; flex-shrink: 0; }
.icon.fill { fill: currentColor; stroke: none; }

#app { display: flex; flex-direction: column; height: 100vh; }

.toolbar {
    min-height: var(--header-height); height: auto; background-color: var(--bg-nav);
    border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; padding: 8px 24px; gap: 12px; flex-shrink: 0; flex-wrap: wrap;
}
.logo { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin-right: 12px; white-space: nowrap; }
.toolbar-divider { width: 1px; height: 24px; background-color: var(--border-color); margin: 0 4px; }

/* User Profile Badge */
.user-profile { display: flex; align-items: center; gap: 8px; background: var(--bg-input); padding: 4px 12px; border-radius: 20px; border: 1px solid var(--border-color); font-size: 0.85rem; margin-right: 8px; }
.user-badge { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); }
.user-role-text { font-weight: 600; color: var(--text-primary); }

.search-wrapper { position: relative; }
.search-wrapper .icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.9em; }
.search-wrapper input { padding-left: 32px; width: 220px; }

.main-content { display: flex; flex-grow: 1; overflow: hidden; }
.sidebar-tree {
    width: var(--sidebar-width); background-color: var(--bg-nav);
    border-right: 1px solid var(--border-color); padding: 20px 12px; overflow-y: auto; flex-shrink: 0;
}
.sidebar-title { font-size: 0.75rem; text-transform: uppercase; color: var(--text-muted); letter-spacing: 1px; margin-bottom: 12px; padding-left: 8px; font-weight: 600; }

.tree-node {
    display: flex; align-items: center; padding: 8px 12px; margin-bottom: 2px;
    border-radius: var(--radius-sm); cursor: pointer; color: var(--text-secondary);
    transition: 0.15s; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tree-node:hover { background-color: var(--bg-hover); color: var(--text-primary); }
.tree-node.active { background-color: rgba(77, 124, 254, 0.15); color: var(--color-primary); font-weight: 600; }
.tree-node .icon { margin-right: 8px; opacity: 0.7; width: 16px; height: 16px; }
.tree-node.active .icon { opacity: 1; }
.tree-node[data-type="building"] { padding-left: 24px; }
.tree-node[data-type="classroom"] { padding-left: 44px; font-size: 0.9rem; }
.tree-toggle-icon { margin-left: -16px; margin-right: 4px; width: 12px; transition: transform 0.2s; }
.tree-node.expanded .tree-toggle-icon { transform: rotate(90deg); }

.dashboard { flex-grow: 1; padding: 24px; overflow-y: auto; background-color: var(--bg-body); }
.dashboard-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border-color); }
.dashboard-title { font-size: 1.5rem; font-weight: 700; margin: 0; }
.dashboard-stats { color: var(--text-muted); }

/* Card Grid */
.card-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }

.group-container { margin-bottom: 32px; }
.group-header { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; gap: 8px; }

.room-card {
    background-color: var(--bg-panel); border: 1px solid var(--border-color);
    border-radius: var(--radius-md); padding: 16px; display: flex; flex-direction: column; gap: 12px;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.room-card.visible { opacity: 1; }
.room-card:hover { border-color: #4B5563; transform: translateY(-2px); box-shadow: 0 10px 20px -5px rgba(0,0,0,0.3); }

.card-header { display: flex; justify-content: space-between; align-items: center; }
.card-title { font-size: 1.1rem; font-weight: 600; margin: 0; }
.card-location { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

.card-checkbox {
    position: relative;
    display: inline-block;
    cursor: pointer;
    user-select: none;
}

.card-checkbox input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    width: 0;
    height: 0;
}

.card-checkbox span {
    position: relative;
    display: inline-block;
    width: 20px;
    height: 20px;
    background-color: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.card-checkbox:hover span {
    border-color: var(--color-primary);
    background-color: var(--bg-hover);
}

.card-checkbox input[type="checkbox"]:checked + span {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.card-checkbox input[type="checkbox"]:checked + span::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.status-dot {
    display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px;
    background-color: #444;
    box-shadow: inset 0 0 2px rgba(0,0,0,0.5);
    transition: all 0.3s;
}
.status-dot.online { background-color: var(--color-success); box-shadow: 0 0 6px var(--color-success); }
.status-dot.offline { background-color: #dc2626; box-shadow: 0 0 6px rgba(220, 38, 38, 0.5); }

.card-body { flex-grow: 1; font-size: 0.85rem; color: var(--text-secondary); display: flex; flex-direction: column; gap: 4px; }
.info-row { display: flex; justify-content: space-between; align-items: center; min-height: 24px; }
.info-row-left { display: flex; align-items: center; }
.info-row strong { color: var(--text-primary); font-family: monospace; font-size: 0.8rem; }

.card-footer { margin-top: 8px; padding-top: 12px; border-top: 1px solid var(--border-color); display: flex; justify-content: flex-end; align-items: center; }
.card-actions { display: flex; gap: 4px; align-items: center; }
.card-actions button { width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; }
.card-actions button.is-recording { color: var(--color-rec); animation: pulse-red 2s infinite; }
@keyframes pulse-red { 0% { opacity: 1; } 50% { opacity: 0.5; } 100% { opacity: 1; } }

/* Modal & Panel */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: flex; justify-content: center; align-items: center; z-index: 2000; opacity: 0; visibility: hidden; transition: all 0.3s; }
.modal-overlay.visible { opacity: 1; visibility: visible; }
.modal { background: var(--bg-panel); border: 1px solid var(--border-color); border-radius: var(--radius-lg); width: 90%; max-width: 650px; max-height: 90vh; display: flex; flex-direction: column; transform: scale(0.95); transition: transform 0.3s var(--ease-cubic); box-shadow: 0 20px 40px rgba(0,0,0,0.5); }
.modal-overlay.visible .modal { transform: scale(1); }
.modal-header { padding: 16px 24px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
.modal-body-scroll { padding: 24px; overflow-y: auto; flex-grow: 1; display: flex; flex-direction: column; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border-color); display: flex; justify-content: flex-end; gap: 12px; background: var(--bg-nav); border-radius: 0 0 var(--radius-lg) var(--radius-lg); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group label { font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); }
.form-tip { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* Side Panel */
.side-panel { 
    position: fixed; top: 0; right: 0; width: 600px; height: 100%; 
    background: var(--bg-body); border-left: 1px solid var(--border-color); 
    transform: translateX(100%); z-index: 1000; display: flex; flex-direction: column;
    transition: transform 0.3s var(--ease-cubic);
}
.side-panel.open { transform: translateX(0); }
.side-panel.resizing { transition: none; }

.panel-header { height: var(--header-height); padding: 0 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; background: var(--bg-nav); flex-shrink: 0; }
.resize-handle-side { position: absolute; left: 0; width: 5px; height: 100%; cursor: ew-resize; z-index: 10; }
.resize-handle-side:hover { background: var(--color-primary); }

.panel-body { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 20px; }
.panel-section { display: flex; flex-direction: column; gap: 8px; }
.panel-section-title { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); display: flex; justify-content: space-between; }

/* Responsive Iframe */
.panel-video-wrapper {
    position: relative; width: 100%; min-height: 200px;
    background: #000; border-radius: var(--radius-sm); 
    overflow: hidden; border: 1px solid var(--border-color);
    display: flex; align-items: flex-start; justify-content: flex-start;
}
.panel-video-wrapper iframe {
    border: none; margin: 0; padding: 0; display: block;
    flex-shrink: 0;
}

.panel-loader { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; background: rgba(0,0,0,0.8); color: white; z-index: 2; pointer-events: none;}
.spinner { width: 40px; height: 40px; border: 4px solid rgba(255,255,255,0.3); border-top-color: white; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Data Management Layout */
.data-mng-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; min-height: 400px; margin-bottom: 24px; }
.data-col-left { display: flex; flex-direction: column; gap: 20px; }
.data-col-right { display: flex; flex-direction: column; }
.data-list-container { display: flex; flex-direction: column; gap: 10px; flex: 1; min-height: 0; overflow: hidden; }
.data-list-header { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 4px; }
.data-search-input { background: var(--bg-input); border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 8px 12px; color: var(--text-primary); font-size: 0.9rem; width: 100%; }
.data-search-input:focus { border-color: var(--color-primary); outline: none; }

.data-manage-modal { width: 900px; height: 600px; max-width: 900px; max-height: 600px; }
.data-manage-modal .modal-body-scroll { overflow: hidden; }
.data-list-box { background: var(--bg-panel); border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow-y: auto; overflow-x: hidden; padding: 8px; flex: 1 1 0; min-height: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; align-content: start; }
.data-item { display: flex; justify-content: space-between; align-items: center; background: var(--bg-item); padding: 8px 12px; border-radius: 4px; margin-bottom: 0; color: var(--text-primary); transition: all 0.2s; border: none; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08); height: 40px; min-height: 40px; max-height: 40px; flex-shrink: 0; }
.data-item:hover { background: var(--bg-hover); box-shadow: 0 2px 4px rgba(0, 0, 0, 0.12); }
body.theme-light .data-item { box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05); }
body.theme-light .data-item:hover { box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08); }
.data-item.new-item { animation: itemAppear 0.4s ease-out; }
@keyframes itemAppear {
    0% { opacity: 0; transform: translateY(-10px) scale(0.95); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}
.data-item .data-item-name { flex: 1; padding: 4px 8px; border-radius: 4px; transition: all 0.2s; cursor: default; min-width: 0; }
.data-item.editing { background: var(--bg-hover); }
.data-item.editing .data-item-name { width: 100%; }
.data-item.editing .edit-input { width: 100%; padding: 4px 8px; background: var(--bg-input); border: 1px solid var(--border-focus); border-radius: 4px; color: var(--text-primary); font-size: 0.9rem; outline: none; }
.data-item.editing .edit-input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(77, 124, 254, 0.2); }
.data-item .btn-group { display: flex; gap: 4px; opacity: 0; transition: opacity 0.2s; }
.data-item:hover .btn-group,
.data-item.editing .btn-group { opacity: 1; }
.data-item .action-btn { padding: 4px 8px; color: var(--text-secondary); border-radius: 4px; font-size: 0.85rem; min-width: 28px; display: flex; align-items: center; justify-content: center; }
.data-item .action-btn:hover { color: var(--color-primary); background: rgba(77, 124, 254, 0.1); }
.data-item .edit-btn { color: var(--color-primary); }
.data-item .edit-btn:hover { background: rgba(77, 124, 254, 0.15); }
.data-item .save-btn { color: var(--color-success); font-weight: 600; }
.data-item .save-btn:hover { background: rgba(76, 175, 80, 0.15); }
.data-item .cancel-btn { color: var(--text-muted); }
.data-item .cancel-btn:hover { background: rgba(107, 114, 128, 0.15); }
.data-item .delete-btn { color: var(--color-danger); padding: 4px 8px; border-radius: 4px; font-size: 0.85rem; min-width: 28px; display: flex; align-items: center; justify-content: center; }
.data-item .delete-btn:hover { background: rgba(255, 92, 92, 0.15); }

.tab-nav { display: flex; border-bottom: 1px solid var(--border-color); margin-bottom: 20px; overflow-x: auto; }
.tab-btn { padding: 12px 20px; border-radius: 0; color: var(--text-secondary); border-bottom: 2px solid transparent; white-space: nowrap; }
.tab-btn.active { color: var(--color-primary); border-bottom-color: var(--color-primary); font-weight: 600; }
.tab-content { display: none; flex: 1; min-height: 0; }
.tab-content.active { display: flex; flex-direction: column; }

/* Login Overlay */
.login-overlay { position: fixed; inset: 0; background: var(--bg-body); z-index: 3000; display: flex; justify-content: center; align-items: center; opacity: 0; visibility: hidden; transition: opacity 0.5s; }
.login-overlay.visible { opacity: 1; visibility: visible; }
.login-box { width: 400px; background: var(--bg-panel); padding: 40px; border-radius: var(--radius-lg); border: 1px solid var(--border-color); box-shadow: 0 20px 50px rgba(0,0,0,0.5); text-align: center; }
.login-title { font-size: 1.8rem; font-weight: 700; margin-bottom: 30px; color: var(--text-primary); }
.login-form-group { margin-bottom: 16px; text-align: left; }
.login-form-group label { display: block; margin-bottom: 8px; color: var(--text-secondary); font-size: 0.85rem; }

.d-none { display: none !important; }
.mt-1 { margin-top: 16px; }

/* Recorder Monitor Bar */
.rec-monitor-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    background: var(--rec-bar-bg);
    border: 1px solid var(--rec-bar-border);
    border-radius: var(--radius-sm);
    margin-top: 8px;
    font-size: 0.75rem;
    min-width: 0; /* flex 축소 허용 */
    overflow: visible; /* 볼륨 바가 항상 보이도록 */
    flex-wrap: nowrap; /* 줄바꿈 방지 */
}

.rec-timer {
    font-family: monospace;
    color: var(--text-primary);
    font-weight: 600;
    min-width: 60px;
    flex-shrink: 1; /* 공간이 부족하면 축소 가능 */
    white-space: nowrap;
}

.rec-divider {
    width: 1px;
    height: 20px;
    background: var(--rec-bar-border);
    flex-shrink: 0; /* 구분선은 크기 고정 */
}

.live-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--color-danger);
    font-weight: 600;
    font-size: 0.7rem;
}

.live-indicator .icon {
    width: 14px;
    height: 14px;
}
/* 레코더 컨트롤 그룹 정렬 */
.rec-controls {
    display: flex;
    gap: 4px; /* 버튼 사이 간격 */
    align-items: center;
    background: var(--bg-input); /* 버튼 그룹의 배경 (선택사항) */
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    flex-shrink: 1; /* 공간이 부족하면 축소 가능 */
}

/* 개별 버튼 스타일 */
.rec-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;  /* 버튼 크기 조정 */
    height: 24px;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-muted); /* 기본 아이콘 색상 */
    flex-shrink: 0; /* 버튼은 최소 크기 유지 */
}

/* 버튼 호버 효과 */
/* .rec-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
} */

/* 아이콘 크기 강제 고정 */
.rec-btn .icon {
    width: 14px !important; /* 내부 아이콘은 조금 작게 설정하여 여백 확보 */
    height: 14px !important;
    transition: all 0.2s ease;
}

/* 활성화 상태 (Active) 디자인 - 하드웨어 느낌 강조 */
.rec-btn.active {
    background: var(--bg-hover);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.3);
}

/* 1. 녹화 중 (Streaming) - 빨간색 */
.rec-btn[data-action="rec-start"].active {
    color: var(--color-danger);
    filter: drop-shadow(0 0 4px rgba(255, 92, 92, 0.4));
}

/* 2. 일시정지 (Paused) - 주황색/노란색 */
.rec-btn[data-action="rec-pause"].active {
    color: var(--color-warning);
    filter: drop-shadow(0 0 4px rgba(255, 193, 7, 0.4));
}

/* 3. 정지 (Ready/Waiting) - 밝은 흰색/회색 */
.rec-btn[data-action="rec-stop"].active {
    color: var(--text-primary);
    filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.2));
}

/* 녹화 중일 때 깜빡이는 애니메이션 (선택 사항) */
.rec-btn[data-action="rec-start"].active .icon {
    animation: rec-blink 1.5s infinite;
}

@keyframes rec-blink {
    0% { opacity: 1; }
    50% { opacity: 0.4; }
    100% { opacity: 1; }
}


.live-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    padding: 3px 6px;
    border-radius: 4px;
    color: var(--text-muted);
    background: rgba(0,0,0,0.08);
    flex-shrink: 1; /* 공간이 부족하면 축소 가능 */
    white-space: nowrap; /* 텍스트 줄바꿈 방지 */
}

.live-indicator .icon {
    width: 16px;
    height: 16px;
    display: block;
    transform: translateY(-1px);
    opacity: 0.6;
}

/* === LIVE ON === */
.live-indicator.streaming {
    color: var(--color-danger);
    background: rgba(255, 92, 92, 0.12);
    box-shadow: 0 0 8px rgba(255, 92, 92, 0.4);
}

.live-indicator.streaming .icon {
    opacity: 1;
    animation: live-blink 1.2s ease-in-out infinite;
}

/* 미세 깜빡임 (크기 변화 없음) */
@keyframes live-blink {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

.icon-btn-new-window {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    width: 32px;
    height: 32px;
}

.icon-btn-new-window .favicon-icon {
    width: 18px !important;
    height: 18px !important;
    max-width: 18px !important;
    max-height: 18px !important;
    filter: grayscale(100%) brightness(0.5) contrast(0.8);
    opacity: 0.6;
    transition: filter 0.2s, opacity 0.2s;
    object-fit: contain;
    display: block;
}

.icon-btn-new-window:hover .favicon-icon {
    filter: grayscale(0%) brightness(1) contrast(1);
    opacity: 1;
}

.audio-meter {
    display: flex;
    gap: 3px;
    align-items: flex-end;
    height: 20px;
    margin-left: auto;
    flex-shrink: 0; /* 볼륨 바는 절대 축소하지 않음 */
    /* 오디오 7 레벨 기준 최소 크기: 7개 세그먼트(5px) + 6개 gap(3px) = 35px + 18px = 53px */
    min-width: 53px;
    flex-grow: 0; /* 확장하지 않음 */
}

.meter-seg {
    width: 5px;
    height: 16px;
    background: var(--border-color);
    border-radius: 2px;
    transition: background-color 0.2s, opacity 0.2s;
    flex-shrink: 0; /* 각 세그먼트는 크기 고정 */
}

.meter-seg.active {
    transition: background 0.2s, opacity 0.2s;
}

/* 오디오 레벨에 따른 그라데이션 색상 */
.meter-seg[data-level="1"].active { background: #4CAF50; }
.meter-seg[data-level="2"].active { background: #66BB6A; }
.meter-seg[data-level="3"].active { background: #81C784; }
.meter-seg[data-level="4"].active { background: #FFC107; }
.meter-seg[data-level="5"].active { background: #FFA726; }
.meter-seg[data-level="6"].active { background: #FF7043; }
.meter-seg[data-level="7"].active { background: var(--color-danger); }

/* 저장공간 바 스타일 */
.storage-bar-container {
    margin-top: 10px;
    padding: 8px 10px;
    background: var(--bg-item);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.storage-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    font-size: 0.75rem;
}

.storage-label {
    color: var(--text-muted);
    font-weight: 500;
}

.storage-value {
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.storage-bar {
    height: 6px;
    background: var(--bg-panel);
    border-radius: 3px;
    overflow: hidden;
}

.storage-bar-used {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease, background-color 0.3s ease;
}

.storage-bar-used.good {
    background: linear-gradient(90deg, #4CAF50, #66BB6A);
}

.storage-bar-used.caution {
    background: linear-gradient(90deg, #FFC107, #FFD54F);
}

.storage-bar-used.warning {
    background: linear-gradient(90deg, #FF9800, #FFB74D);
}

.storage-bar-used.critical {
    background: linear-gradient(90deg, #F44336, #E57373);
    animation: pulse-storage 1.5s ease-in-out infinite;
}

@keyframes pulse-storage {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* 저장장치 없음 상태 */
.storage-bar-container.no-storage {
    opacity: 0.7;
}

.storage-value.no-storage-text {
    color: var(--text-muted);
    font-style: italic;
}

.storage-bar-empty {
    height: 100%;
    width: 100%;
    background: repeating-linear-gradient(
        -45deg,
        var(--border-color),
        var(--border-color) 4px,
        transparent 4px,
        transparent 8px
    );
    border-radius: 3px;
}

[data-action="open-panel"], 
[data-action="open-panel"] * {
    /* 버튼 내부의 모든 요소(SVG, Path)가 클릭을 무시하고 버튼으로 이벤트를 넘깁니다 */
    pointer-events: none; 
}

/* 다만 버튼 자체는 클릭을 받아야 하므로 아래와 같이 설정합니다 */
button[data-action] {
    pointer-events: auto !important;
}