/* ===== Left Toolbar ===== */
#toolbar {
    position: absolute;
    top: 50%;
    left: 12px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.toolbar-btn {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    padding: 0;
    transition: all 0.15s;
}

.toolbar-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.toolbar-btn.active {
    background: var(--accent);
    color: #fff;
}

.toolbar-btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.toolbar-btn .material-symbols-outlined {
    font-size: 20px;
    line-height: 1;
    font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
}

.toolbar-separator {
    width: 26px;
    height: 1px;
    background: var(--border-color);
    margin: 3px auto;
}

/* ===== Top Bar ===== */
#top-bar {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 4px 10px;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    font-size: 12px;
    color: var(--text-secondary);
}

#top-bar .zoom-display {
    display: none; /* zoom now in zoom-bar */
}
#top-bar .zoom-display:hover {
    color: var(--text-primary);
}

.top-bar-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    padding: 0;
}
.top-bar-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.top-bar-btn svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.top-bar-btn .material-symbols-outlined {
    font-size: 18px;
    line-height: 1;
    font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
}

/* ===== Bottom Zoom Bar ===== */
#zoom-bar {
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 4px 10px;
    z-index: 200;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    font-size: 12px;
    color: var(--text-secondary);
    user-select: none;
}

.zoom-display {
    min-width: 52px;
    text-align: center;
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary);
}
.zoom-display:hover {
    color: var(--text-primary);
}

.zoom-bar-btn {
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    transition: background 0.12s;
}
.zoom-bar-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.zoom-bar-btn svg {
    width: 14px;
    height: 14px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
}
.zoom-bar-btn .material-symbols-outlined {
    font-size: 18px;
    line-height: 1;
    font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
}